WorldWideScience

Sample records for subperiosteal dental implants

  1. 21 CFR 872.3645 - Subperiosteal implant material.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Subperiosteal implant material. 872.3645 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3645 Subperiosteal implant material. (a) Identification. Subperiosteal implant material is a device composed of titanium or cobalt chrome molybdenum...

  2. Osseointegration of subperiosteal implants using bovine bone substitute and various membranes

    DEFF Research Database (Denmark)

    Aaboe, Merete; Schou, S.; Hjørting-Hansen, E.

    2000-01-01

    Osseointegration, subperiosteal implant, bone substitute, bovine bone, guided bone, regeneration, histology, rabbits......Osseointegration, subperiosteal implant, bone substitute, bovine bone, guided bone, regeneration, histology, rabbits...

  3. Dental Implant Surgery

    Science.gov (United States)

    ... to find out more. Dental Implant Surgery Dental Implant Surgery Dental implant surgery is, of course, surgery, and is ... to find out more. Dental Implant Surgery Dental Implant Surgery Dental implant surgery is, of course, surgery, and is ...

  4. Osseointegration of subperiosteal implant via guided tissue regeneration. A pilot study

    DEFF Research Database (Denmark)

    Hjørting-Hansen, E; Helbo, M; Aaboe, M

    1995-01-01

    The principle of guided tissue regeneration was applied in an attempt to generate bone to cover a subperiosteal implant. Titanium frame works, casted on individual impressions of the anterior surface of the tibia of 4 Copenhagen White rabbits, were stabilized to the tibia by microscrews, and half...

  5. Sub-Periosteal Dissection with Denture-Guided Epithelial Regeneration: A Novel Method for Peri-Implant Soft Tissue Management in Reconstructed Mandibles.

    Science.gov (United States)

    Kumar, Vinay V; Jacob, P C; Kuriakose, Moni A

    2016-12-01

    In patients with reconstructed mandibles using free fibula flaps, management of soft tissues around implants supporting dental rehabilitation, is often a clinical problem. The aim of this paper is to describe a new technique, namely "Sub-periosteal dissection and denture-guided epithelial regeneration (SD-DGER)", as a method of peri-implant soft tissue management in these patients. The technique consists of performing a subperiosteal dissection with creation of buccal and lingual flaps. These flaps form the buccal and lingual vestibule. Implants are placed and an interim denture is immediately loaded onto the implants to guide the regenerated epithelium. A keratinized mucosal layer is formed on the bare fibula bone in six months time. This technique was successful in producing fixed keratinized epithelial tissue around implants in patients with mandibles reconstructed using the free fibula flap in patients who did not undergo radiotherapy. The sub-periosteal dissection with denture guided epithelial regeneration is a predictable form of peri-implant soft tissue management in selected patients with reconstructed jaws.

  6. Nanotechnology and Dental Implants

    OpenAIRE

    Sandrine Lavenus; Guy Louarn; Pierre Layrolle

    2010-01-01

    The long-term clinical success of dental implants is related to their early osseointegration. This paper reviews the different steps of the interactions between biological fluids, cells, tissues, and surfaces of implants. Immediately following implantation, implants are in contact with proteins and platelets from blood. The differentiation of mesenchymal stem cells will then condition the peri-implant tissue healing. Direct bone-to-implant contact is desired for a biomechanical anchoring of i...

  7. Dental Implant Systems

    Science.gov (United States)

    Oshida, Yoshiki; Tuna, Elif B.; Aktören, Oya; Gençay, Koray

    2010-01-01

    Among various dental materials and their successful applications, a dental implant is a good example of the integrated system of science and technology involved in multiple disciplines including surface chemistry and physics, biomechanics, from macro-scale to nano-scale manufacturing technologies and surface engineering. As many other dental materials and devices, there are crucial requirements taken upon on dental implants systems, since surface of dental implants is directly in contact with vital hard/soft tissue and is subjected to chemical as well as mechanical bio-environments. Such requirements should, at least, include biological compatibility, mechanical compatibility, and morphological compatibility to surrounding vital tissues. In this review, based on carefully selected about 500 published articles, these requirements plus MRI compatibility are firstly reviewed, followed by surface texturing methods in details. Normally dental implants are placed to lost tooth/teeth location(s) in adult patients whose skeleton and bony growth have already completed. However, there are some controversial issues for placing dental implants in growing patients. This point has been, in most of dental articles, overlooked. This review, therefore, throws a deliberate sight on this point. Concluding this review, we are proposing a novel implant system that integrates materials science and up-dated surface technology to improve dental implant systems exhibiting bio- and mechano-functionalities. PMID:20480036

  8. Smoking and dental implants

    OpenAIRE

    Kasat, V.; Ladda, R

    2012-01-01

    Smoking is a prevalent behaviour in the population. The aim of this review is to bring to light the effects of smoking on dental implants. These facts will assist dental professionals when implants are planned in tobacco users. A search of “PubMed” was made with the key words “dental implant,” “nicotine,” “smoking,” “tobacco,” and “osseointegration.” Also, publications on tobacco control by the Government of India were considered. For review, only those articles published from 1988 onward in ...

  9. Optimization of dental implantation

    Science.gov (United States)

    Dol, Aleksandr V.; Ivanov, Dmitriy V.

    2017-02-01

    Modern dentistry can not exist without dental implantation. This work is devoted to study of the "bone-implant" system and to optimization of dental prostheses installation. Modern non-invasive methods such as MRI an 3D-scanning as well as numerical calculations and 3D-prototyping allow to optimize all of stages of dental prosthetics. An integrated approach to the planning of implant surgery can significantly reduce the risk of complications in the first few days after treatment, and throughout the period of operation of the prosthesis.

  10. Titanium and polyether ether ketone (PEEK) patient-specific sub-periosteal implants: two novel approaches for rehabilitation of the severely atrophic anterior maxillary ridge.

    Science.gov (United States)

    Mounir, M; Atef, M; Abou-Elfetouh, A; Hakam, M M

    2017-12-01

    The aim of this study was to assess two new protocols for single-stage rehabilitation of the severely atrophic maxillary ridge using customized porous titanium or polyether ether ketone (PEEK) sub-periosteal implants. Ten patients with a severely atrophic anterior maxillary alveolar ridge were divided randomly into two groups (five patients in each) to receive customized sub-periosteal implants fabricated via CAD/CAM technology: group 1, porous titanium implants; group 2, PEEK implants. Prosthetic loading with fixed acrylic bridges was performed 1 month postoperative. The implants were followed-up for 12 months and evaluated for the presence of any sign of radiographic bone resorption, mobility, infection, prosthetic fracture, or implant exposure. The immediate postoperative period was uneventful except for one case complicated by wound dehiscence in group 1. At 12 months, all implants were functionally stable and the patients were comfortable with the prostheses. No signs of radiographic bone resorption, mobility, infection, or prosthetic fracture were observed. Within the limitations of this study, the application of customized porous titanium and PEEK sub-periosteal implants produced through CAD/CAM technology appears to be an acceptable method for single-stage prosthetic rehabilitation of the severely atrophic edentulous anterior maxilla. This study was awarded the best case study at the academy of osseintegration annual meeting 2017, Orlando, Florida. Copyright © 2017 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  11. Dental implants: A review.

    Science.gov (United States)

    Guillaume, B

    2016-12-01

    A high number of patients have one or more missing tooth and it is estimated that one in four American subjects over the age of 74 have lost all their natural teeth. Many options exist to replace missing teeth but dental implants have become one of the most used biomaterial to replace one (or more) missing tooth over the last decades. Contemporary dental implants made with titanium have been proven safe and effective in large series of patients. This review considers the main historical facts concerned with dental implants and present the different critical factors that will ensure a good osseo-integration that will ensure a stable prosthesis anchorage. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  12. [Osteoradionecrosis and dental implants].

    Science.gov (United States)

    Ben Slama, L; Hasni, W; De Labrouhe, C; Bado, F; Bertrand, J-C

    2008-12-01

    Osteoradionecrosis (ORN) is a severe complication of radiation therapy (RT). A triggering factor is frequently present. It is often a dental, periodental, or surgical traumatism. We report the case of a bilateral ORN: the first lesion appeared 3months after the end of RT around the osteosynthesis plate and was treated by mandibular resection. The second lesion appeared 40months after RT on the opposite side, due to peri-implantitis. Dental implants had been inserted 10years before cancer therapy. No case of ORN in post-implantation RT had been previously reported. A 75-year-old woman was admitted for a squamous cell carcinoma of the right cheek extending to the intermaxillary commissure, the maxillary tuberosity, the soft palate, the lingual junction, and the vestibule up to the second premolar area. There was no suspicious lymph node. She had undergone dental implant procedure 15 and 10 years before, respectively, one in the second premolar position of the right maxilla and four in the premolar and molar left mandible area. All of them were osseo-integrated and charged. A trans-mandibular buccopharyngectomy with modified radical neck dissection was performed, completed by RT. The total dose of irradiation was 65Gy in the oral cavity and 45Gy on cervical and supraclavicular areas. Delayed mucosal healing was observed on the right mandible and ORN appeared in this area 3months after the end of irradiation. Mandibular resection was necessary. Later, the right maxillary implant was lost, and multiple dental extractions were required. Forty months after RT, peri-implantitis was observed on the left side of the mandible, complicated by ORN and pathological fracture. No surgical reconstruction could be performed because of the patient's age and state. The patient was carrying a complete removable maxillary prosthesis on latest follow-up. This was the first case of ORN on dental implants placed before RT. RT is a risk factor of implant failure, a relatively rare and

  13. Dental Implant Surgery

    Science.gov (United States)

    ... upper jaw protrude into one of your sinus cavities How you prepare Because dental implants require one or more surgical procedures, you ... can take several months, helps provide a solid base for your new artificial tooth ... teeth. Placing the abutment When osseointegration is complete, you ...

  14. Optimization of dental implant treatment

    National Research Council Canada - National Science Library

    Dmitriy V. Ivanov; Aleksandr V. Dol; Dmitriy A. Smirnov

    2016-01-01

    Aim ― Modern dentistry cannot exist without dental implantation. The lifetime of the installed implants depends on condition of the bone and on the quality of the treatment planning and surgery technique...

  15. [The impact of dental implants

    NARCIS (Netherlands)

    Meijer, G.J.

    2013-01-01

    The importance of the introduction of dental implants can only be understood when the historical context is clarified. In the past, the main treatment carried out by dentists consisted of filling or, in unfortunate cases, removal of painful teeth. Only since the introduction of dental implants did

  16. DEALING WITH DENTAL IMPLANT FAILURES

    Science.gov (United States)

    Levin, Liran

    2008-01-01

    An implant-supported restoration offers a predictable treatment for tooth replacement. Reported success rates for dental implants are high. Nevertheless, failures that mandate immediate implant removal do occur. The consequences of implant removal jeopardize the clinician's efforts to accomplish satisfactory function and esthetics. For the patient, this usually involves further cost and additional procedures. The aim of this paper is to describe different methods and treatment modalities to deal with dental implant failure. The main topics for discussion include identifying the failing implant, implants replacing failed implants at the exact site, and the use of other restorative options. When an implant fails, a tailor made treatment plan should be provided to each patient according to all relevant variables. Patients should be informed regarding all possible treatment modalities following implant failure and give their consent to the most appropriate treatment option for them. PMID:19089213

  17. Dealing with dental implant failures

    Directory of Open Access Journals (Sweden)

    Liran Levin

    2008-06-01

    Full Text Available An implant-supported restoration offers a predictable treatment for tooth replacement. Reported success rates for dental implants are high. Nevertheless, failures that mandate immediate implant removal do occur. The consequences of implant removal jeopardize the clinician's efforts to accomplish satisfactory function and esthetics. For the patient, this usually involves further cost and additional procedures. The aim of this paper is to describe different methods and treatment modalities to deal with dental implant failure. The main topics for discussion include identifying the failing implant, implants replacing failed implants at the exact site, and the use of other restorative options.When an implant fails, a tailor made treatment plan should be provided to each patient according to all relevant variables. Patients should be informed regarding all possible treatment modalities following implant failure and give their consent to the most appropriate treatment option for them.

  18. Current trends in dental implants

    OpenAIRE

    Gaviria, Laura; Salcido, John Paul; Guda, Teja; Ong, Joo L.

    2014-01-01

    Tooth loss is very a very common problem; therefore, the use of dental implants is also a common practice. Although research on dental implant designs, materials and techniques has increased in the past few years and is expected to expand in the future, there is still a lot of work involved in the use of better biomaterials, implant design, surface modification and functionalization of surfaces to improve the long-term outcomes of the treatment. This paper provides a brief history and evoluti...

  19. Biomimetic approach to dental implants.

    Science.gov (United States)

    Kim, Tae-Il; Jang, Jun-Hyeog; Kim, Hae-Won; Knowles, Jonathan C; Ku, Young

    2008-01-01

    Titanium, as an implant material, is regarded to be durable and biocompatible, which allows functional replacement of missing teeth. Successful dental implantation depends on an osseointegration phenomenon, a direct structural and functional binding reaction between bone and implant. It is well known that physicochemical characteristics of the dental implant surface, such as roughness, topography, chemistry, and electrical charge affect the biological reactions occurring at the interface of tissue and implant. Therefore, considerable efforts have been made to modify the surface of titanium implants which are based on mechanical, physical and chemical treatments. Recently, biological molecules were introduced onto the surface of implants to stimulate osteogenic cells in the early stage of implantation and consequently accelerate bone formation around implant and subsequent rapid implant stabilization. A range of extracellular matrix components, designed peptides, and growth factors have been proposed as the biological moiety. In this review, we address several issues related to the biology of dental implants and discuss biomimetic modification of the implant surface as a novel approach to obtain successful osseointegration.

  20. ADVANCED DENTAL IMPLANT PLACEMENT TECHNIQUES

    Directory of Open Access Journals (Sweden)

    Alex M. GREENBERG

    2017-12-01

    Full Text Available The availability of in office Cone Beam CT (CBCT scanners, dental implant planning software, CAD CAM milling, and rapid printing technologies allow for the precise placement of dental implants and immediate prosthetic temporization. These technologies allow for flapless implant placement, or open flap bone reduction for “All on 4” techniques with improved preoperative planning and intraoperative performance. CBCT permits practitioners in an office setting with powerful diagnostic capabilities for the evaluation of bone quality and quantity, as well as dental and osseous pathology essential for better informed dental implant treatment. CBCT provides the convenience of in office imaging and decreased radiation exposure. Rapid printing technologies provide decreased time and high accuracy for bone model and surgical guide fabrication.

  1. [Dental implants in tooth grinders].

    Science.gov (United States)

    Lobbezoo, F; Brouwers, J E; Cune, M S; Naeije, M

    2004-03-01

    Bruxism (tooth grinding and clenching) is generally considered a contraindication for dental implants, although the evidence is usually based on clinical experience only. So far, studies to the possible cause-and-effect relationship between bruxism and implant failure do not yield consistent and specific outcomes. This is partly due to the large variation in the technical and the biological aspects of the investigations. Although there is still no proof that bruxism causes overload of dental implants and their suprastructures, a careful approach is recommended. Practical advices as to minimize the chance of implant failure are given. Besides the recommendation to reduce or eliminate bruxism itself, these advices concern the number and dimensions of the implants, the design of the occlusion and articulation patterns, and the use of a hard nightguard.

  2. Recent advances in dental implants.

    Science.gov (United States)

    Hong, Do Gia Khang; Oh, Ji-Hyeon

    2017-12-01

    Dental implants are a common treatment for the loss of teeth. This paper summarizes current knowledge on implant surfaces, immediate loading versus conventional loading, short implants, sinus lifting, and custom implants using three-dimensional printing. Most of the implant surface modifications showed good osseointegration results. Regarding biomolecular coatings, which have been recently developed and studied, good results were observed in animal experiments. Immediate loading had similar clinical outcomes compared to conventional loading and can be used as a successful treatment because it has the advantage of reducing treatment times and providing early function and aesthetics. Short implants showed similar clinical outcomes compared to standard implants. A variety of sinus augmentation techniques, grafting materials, and alternative techniques, such as tilted implants, zygomatic implants, and short implants, can be used. With the development of new technologies in three-dimension and computer-aided design/computer-aided manufacturing (CAD/CAM) customized implants can be used as an alternative to conventional implant designs. However, there are limitations due to the lack of long-term studies or clinical studies. A long-term clinical trial and a more predictive study are needed.

  3. Awareness of dental implants among dental patients in Nigeria ...

    African Journals Online (AJOL)

    The aim of this study was to determine the level of awareness of dental implant in Nigerian patients and their willingness to choose dental implant as a tooth replacement option. A survey was conducted among patients presenting for dental treatment in 3 teaching hospitals and private dental clinics in 3 urban cities of ...

  4. Zirconia dental implants: a literature review

    National Research Council Canada - National Science Library

    Özkurt, Zeynep; Kazazoğlu, Ender

    2011-01-01

    Titanium and titanium alloys are widely used for fabrication of dental implants. Because of potential immunologic and possible esthetic compromises with titanium implants, novel implant technologies are being developed...

  5. Subperiosteal midface-lift.

    Science.gov (United States)

    Patrocinio, Lucas G; Patrocinio, Tomas G; Patrocinio, Jose A

    2013-06-01

    The subperiosteal midface-lift has benefited from significant technological advances in medicine. The endoscope now allows extensive subperiosteal undermining of facial soft tissue through minimal access incisions. Improved understanding of facial anatomy and the facial aging process now allow repositioning and remodeling of the soft tissue envelope with excellent aesthetic results. The subperiosteal midface-lift by a temporal approach is a procedure designed to rejuvenate the middle third of the face. After subperiosteal detachment, the soft tissues of the cheek, jowls, lateral canthus, and inferior orbital rim can be lifted to reestablish their youthful relationship with the underlying skeleton. It is a technique that produces satisfactory cosmetic results in most cases, causing malar augmentation, nasolabial fold improvement, and mild jowl improvement. We describe our preferred technique in detail and discuss its indications, complications, advantages, and limitations. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

  6. Dental implants in oral cancer reconstruction.

    Science.gov (United States)

    Kim, D David; Ghali, G E

    2011-05-01

    Endosseous implants have revolutionized dental prosthetic rehabilitation, providing a reliable, a stable, and an aesthetic option for dental reconstruction. Dental implants have similarly improved the functionality of reconstructions following cancer surgery. The use of dental implants in oral cancer reconstruction can be divided into 2 categories: (1), for retention of a prosthetic device, for example, palatal obturator, used as the primary means of maxillary reconstruction, and (2), for dental rehabilitation after bony reconstruction of the jaws. This article discusses these different uses of endosseous implants in patients with head and neck cancer. Copyright © 2011 Elsevier Inc. All rights reserved.

  7. Systemic Assessment of Patients Undergoing Dental Implant ...

    African Journals Online (AJOL)

    Background: Procedure‑related and patient‑related factors influence the prognosis of dental implants to a major extent. Hence, we aimed to evaluate and analyze various systemic factors in patients receiving dental implants. Materials and Methods: Fifty‑one patients were included in the study, in which a total of 110 dental ...

  8. Bacteremia following dental implant surgery: Preliminary results

    OpenAIRE

    Bölükbas, Nilüfer; Özdemi, Tayfun; Öksüz, Lütfiye; Gürler, Nezahat

    2011-01-01

    Objectives: The aims of this study were to investigate the incidence of bacteremia, bacteriology and antibiotic susceptibility against to causative bacteria associated with dental implant installation. Study Design: 30 generally healthy patients were enrolled in this study. Blood samples were collected at baseline and at 30 minutes after dental implant installation and 24 hours after dental implant surgery. Blood samples were cultured in a BACTEC system. The isolated bacteria were identified ...

  9. Dental Implants: Plasma polymerization for antibacterial coatings

    OpenAIRE

    Buxadera Palomero, Judit; Canal Barnils, Cristina; Gil Mur, Francisco Javier; Rodríguez Rius, Daniel

    2016-01-01

    Dental implants are widely used to overcome tooth loss. The material of choice for this application is titanium, due to its excellent mechanical properties, high corrosion resistance, and high biocompatibility. Despite the high success rate of titanium dental implants, there are a significant number of failures due to the infection of the surrounding tissues. The best way to avoid infections related to the use of dental implants is to achieve an antibacterial surface, either by physical or ch...

  10. R&D on dental implants breakage

    Science.gov (United States)

    Croitoru, Sorin Mihai; Popovici, Ion Alexandru

    2017-09-01

    Most used dental implants for human dental prostheses are of two steps type: first step means implantation and, after several months healing and osseointegration, second step is prosthesis fixture. For sure, dental implants and prostheses are meant to last for a lifetime. Still, there are unfortunate cases when dental implants break. This paper studies two steps dental implants breakage and proposes a set of instruments for replacement and restoration of the broken implant. First part of the paper sets the input data of the study: structure of the studied two steps dental implants based on two Romanian patents and values of the loading forces found in practice and specialty papers. In the second part of the paper, using DEFORM 2D™ FEM simulation software, worst case scenarios of loading dental implants are studied in order to determine which zones and components of the dental implant set are affected (broken). Last part of the paper is dedicated to design and presentation of a set for extracting and cutting tools used to restore the broken implant set.

  11. New dental implant selection criterion based on implant design.

    Science.gov (United States)

    El-Anwar, Mohamed I; El-Zawahry, Mohamed M; Ibraheem, Eman M; Nassani, Mohammad Zakaria; ElGabry, Hisham

    2017-01-01

    A comparative study between threaded and plain dental implant designs was performed to find out a new criterion for dental implant selection. Several dental implant designs with a systematic increase in diameter and length were positioned in a cylindrical-shaped bone section and analyzed using finite element method. Four loading types were tested on different dental implant designs; tension of 50 N, compression of 100 N, bending of 20 N, and torque of 2 Nm, to derive design curves. Better stress distribution on both spongy and cortical bone was noted with an increase in dental implant diameter and length. With the increase in dental implant side area, a stress reduction in the surrounding bones was observed, where threaded dental implants showed better behavior over the plain ones. Increasing value of ratio between dental implant side area and its cross-sectional area reduces stresses transferred to cortical and spongy bones. The use of implants with higher ratio of side area to cross-section area, especially with weak jaw bone, is recommended.

  12. Surgical Templates for Dental Implant Positioning; Current ...

    African Journals Online (AJOL)

    applicability of surgical templates used in the placement of dental implants. KEYWORDS: Dental implants, surgical templates, surgical procedure, stent. Access this .... ended up with the identification of basic three‑fabrication design concepts; (1) ... surgical guide on mounted diagnostic models of patient's mouth. He also ...

  13. Systemic Assessment of Patients Undergoing Dental Implant ...

    African Journals Online (AJOL)

    These days, dental implants are becoming routinely used as a treatment option for rehabilitation of lost teeth. Conventionally, it is only after the completion of bone healing that the dental implants are loaded into the bone. Bone healing time is approximately 3 months and. 6 months for the mandible and maxilla, respectively.

  14. Head and neck cancer, dental implants, and dental oncology.

    Science.gov (United States)

    Garg, Arun; Guez, Ghislaine

    2011-01-01

    Head and neck cancer is a real presence in the dental-implant world--patients who undergo surgery, chemotherapy, and/or radiation often seek the assistance of dental-implant practitioners to restore them to better function; other patients who have had implants in place for years will return with questions regarding how their treatment will be affected by the presence of their dental implant. As oral-cancer treatment modalities are rapidly changing, practitioners struggle to keep up with the literature surrounding this important subset of the dental-implant population. This month, we look at the numbers of patients suffering from oral cancers, consider the different treatment options for patients with oral cancers, and investigate the role that implants play in improving therapeutic outcomes or changing treatment course.

  15. Relation between bruxism and dental implants

    OpenAIRE

    Torcato, Leonardo Bueno [UNESP; Zuim,Paulo Renato Junqueira; Brandini, Daniela Atili; Falcón-Antenucci, Rosse Mary [UNESP

    2014-01-01

    OBJECTIVE: The aim of this study was to gather information and discuss the predictability of implant-supported prostheses in patients with bruxism by performing a literature review.METHODS: In order to select the studies included in this review, a detailed search was performed in PubMed and Medlinedatabases, using the following key words: bruxism, dental implants, implant supported prosthesis, and dental restoration failure. Items that were included are: case reports, randomized controlled tr...

  16. Surgical Templates for Dental Implant Positioning; Current ...

    African Journals Online (AJOL)

    Surgical templates for dental implant. 5. Nigerian Journal of Surgery. Jan‑Jun 2015 | Volume 21 | Issue 1. 18. Tarlow JL. Fabrication of an implant surgical stent for the edentulous mandible. J Prosthet Dent 1992;67:217‑8. 19. Stellino G, Morgano SM, Imbelloni A. A dual‑purpose, implant stent made from a provisional fixed ...

  17. Bone manipulation procedures in dental implants.

    Science.gov (United States)

    Mittal, Yuvika; Jindal, Govind; Garg, Sandeep

    2016-01-01

    The use of dental implants for the rehabilitation of missing teeth has broadened the treatment options for patients and clinicians equally. As a result of advances in research in implant design, materials, and techniques, the use of dental implants has increased dramatically in the past two decades and is expected to expand further in the future. Success of dental implants depends largely on the quality and quantity of the available bone in the recipient site. This however may be compromised or unavailable due to tumor, trauma, periodontal disease, etc., which in turn necessitates the need for additional bone manipulation. This review outlines the various bone manipulation techniques that are used to achieve a predictable long-term success of dental implants.

  18. Oral squamous cell carcinoma around dental implants.

    Science.gov (United States)

    Czerninski, Rakefet; Kaplan, Ilana; Almoznino, Galit; Maly, Alexander; Regev, Eran

    2006-10-01

    It is well documented that oral squamous cell carcinoma (OSCC) is related to risk factors such as smoking and alcohol consumption as well as premalignant lesions and conditions such as leukoplakia, oral lichen planus (OLP), and previous malignancy of the upper respiratory system and gastrointestinal tract. Osseointegrated dental implants are rarely reported in association with OSCC. This article presents 2 cases of OSCC adjacent to dental implants in patients at risk for oral cancer--1 was a heavy smoker with OLP; the other had a history of previous oral and colon cancer. Six additional cases of malignancy adjacent to dental implants were retrieved from the literature; the majority of cases had at least 1 recognized risk factor for oral cancer. Although such cases are rarely reported, patients at risk for oral cancer, especially those with multiple existing risk factors, that present with failing dental implants should be thoroughly evaluated to rule out the presence of malignancy disguised as peri-implant disease.

  19. Osseoperception in Dental Implants: A Systematic Review.

    Science.gov (United States)

    Mishra, Sunil Kumar; Chowdhary, Ramesh; Chrcanovic, Bruno Ramos; Brånemark, Per-Ingvar

    2016-04-01

    Replacement of lost teeth has significant functional and psychosocial effects. The capability of osseointegrated dental implants to transmit a certain amount of sensibility is still unclear. The phenomenon of developing a certain amount of tactile sensibility through osseointegrated dental implants is called osseoperception. The aim of this article is to evaluate the available literature to find osseoperception associated with dental implants. To identify suitable literature, an electronic search was performed using Medline and PubMed database. Articles published in English and articles whose abstract is available in English were included. The articles included in the review were based on osseoperception, tactile sensation, and neurophysiological mechanoreceptors in relation to dental implants. Articles on peri-implantitis and infection-related sensitivity were not included. Review articles without the original data were excluded, although references to potentially pertinent articles were noted for further follow-up. The phenomenon of osseoperception remains a matter of debate, so the search strategy mainly focused on articles on osseoperception and tactile sensibility of dental implants. This review presents the histological, neurophysiological, and psychophysical evidence of osseoperception and also the role of mechanoreceptors in osseoperception. The literature on osseoperception in dental implants is very scarce. The initial literature search resulted in 90 articles, of which 81 articles that fulfilled the inclusion criteria were included in this systematic review. Patients restored with implant-supported prostheses reported improved tactile and motor function when compared with patients wearing complete dentures. © 2016 by the American College of Prosthodontists.

  20. Ultrasonic evaluation of dental implant osseointegration.

    Science.gov (United States)

    Vayron, Romain; Soffer, Emmanuel; Anagnostou, Fani; Haïat, Guillaume

    2014-11-07

    Dental implants are widely used for oral rehabilitation. However, there remain risks of failure which are difficult to anticipate and depend on the implant osseointegration. The objective of this in vivo study is to determine the variation of the echographic ultrasonic response of a dental implant to bone healing around the implant interface. Twenty one dental implants were inserted in the femur of seven New Zealand white rabbits. Two animals were sacrificed after a healing duration of two weeks, three animals after six weeks and six animals after eleven weeks. The 10 MHz ultrasonic response of the implant was measured just after the implantation using a dedicated device positioned at the emerging surface of each dental implant. The measurements were realized again before the sacrifice with the same device. An indicator I˜ was derived based on the amplitude of the rf signal obtained for each configuration. The bone-Implant Contact (BIC) ratio was determined by histological analyses. The average value of the relative variation of the indicator I˜ obtained after initial surgery and after the corresponding healing period varies between 7% and 40%. A Kruskal-Wallis test (pdental implant varies significantly as a function of healing time, which paves the way for the development of a new quantitative ultrasound (QUS) method in oral implantology. Copyright © 2014 Elsevier Ltd. All rights reserved.

  1. Techniques for dental implant nanosurface modifications

    National Research Council Canada - National Science Library

    Pachauri, Preeti; Bathala, Lakshmana Rao; Sangur, Rajashekar

    2014-01-01

    .... The objective of this review article is to summarize the role of nanotopography on titanium dental implant surfaces in order to improve osseointegration and various techniques that can generate...

  2. Diagnostic Imaging for Dental Implant Therapy

    Directory of Open Access Journals (Sweden)

    Aishwarya Nagarajan

    2014-01-01

    Full Text Available Dental implant is a device made of alloplastic (foreign material implanted into the jaw bone beneath the mucosal layer to support a fixed or removable dental prosthesis. Dental implants are gaining immense popularity and wide acceptance because they not only replace lost teeth but also provide permanent restorations that do not interfere with oral function or speech or compromise the self-esteem of a patient. Appropriate treatment planning for replacement of lost teeth is required and imaging plays a pivotal role to ensure a satisfactory outcome. The development of pre-surgical imaging techniques and surgical templates helps the dentist place the implants with relative ease. This article focuses on various types of imaging modalities that have a pivotal role in implant therapy.

  3. LOCAL COMPLICATIONS OCCURRING DURING DENTAL IMPLANTATION

    Directory of Open Access Journals (Sweden)

    Tihomir Georgiev

    2010-11-01

    Full Text Available With regard to the emergence of new concepts in dental treatment involving placement of dental implants and the significance of therapeutic treatment of the intrusion in their complications. The purpose of the article is to make a review of the problems and to point out options for their treatment.

  4. Biofilm and dental implant: The microbial link

    Science.gov (United States)

    Dhir, Sangeeta

    2013-01-01

    Mouth provides a congenial environment for the growth of the microorganisms as compared to any other part of the human body by exhibiting an ideal nonshedding surface. Dental plaque happens to be a diverse community of the microorganisms found on the tooth surface. Periodontal disease and the peri-implant disease are specific infections that are originating from these resident microbial species when the balance between the host and the microbial pathogenicity gets disrupted. This review discusses the biofilms in relation to the peri-implant region, factors affecting its presence, and the associated treatment to manage this complex microbial colony. Search Methodology: Electronic search of the medline was done with the search words: Implants and biofilms/dental biofilm formation/microbiology at implant abutment interface/surface free energy/roughness and implant, periimplantitis/local drug delivery and dental implant. Hand search across the journals – clinical oral implant research, implant dentistry, journal of dental research, international journal of oral implantology, journal of prosthetic dentistry, perioodntology 2000, journal of periodontology were performed. The articles included in the review comprised of in vivo studies, in vivo (animal and human) studies, abstracts, review articles. PMID:23633764

  5. Dental implants in the medically compromised patient

    National Research Council Canada - National Science Library

    Diz, Pedro; Scully, Crispian; Sanz, Mariano

    2013-01-01

    .... The degree of systemic disease-control may be far more important that the nature of the disorder itself, and individualized medical control should be established prior to implant therapy, since in many of these patients the quality of life and functional benefits from dental implants may outweigh any risks.

  6. Dental Implants in Patients with Sjogren's Syndrome

    NARCIS (Netherlands)

    Korfage, Anke; Raghoebar, Gerry M; Arends, Suzanne; Meiners, Petra M; Visser, Anita; Kroese, Frans Gm; Bootsma, Hendrika; Vissink, Arjan

    2016-01-01

    Background: Limited evidence is available for applying dental implants in Sjogren's syndrome (SS) patients. Purpose: This study aims to retrospectively assess clinical outcome of implant therapy in a cohort of well-classified patients with SS. Materials and Methods: All SS patients attending the

  7. Biofilm and dental implant: The microbial link

    Directory of Open Access Journals (Sweden)

    Sangeeta Dhir

    2013-01-01

    Full Text Available Mouth provides a congenial environment for the growth of the microorganisms as compared to any other part of the human body by exhibiting an ideal nonshedding surface. Dental plaque happens to be a diverse community of the microorganisms found on the tooth surface. Periodontal disease and the peri-implant disease are specific infections that are originating from these resident microbial species when the balance between the host and the microbial pathogenicity gets disrupted. This review discusses the biofilms in relation to the peri-implant region, factors affecting its presence, and the associated treatment to manage this complex microbial colony. Search Methodology: Electronic search of the medline was done with the search words: Implants and biofilms/dental biofilm formation/microbiology at implant abutment interface/surface free energy/roughness and implant, periimplantitis/local drug delivery and dental implant. Hand search across the journals - clinical oral implant research, implant dentistry, journal of dental research, international journal of oral implantology, journal of prosthetic dentistry, perioodntology 2000, journal of periodontology were performed. The articles included in the review comprised of in vivo studies, in vivo (animal and human studies, abstracts, review articles.

  8. Biofilm and dental implant: The microbial link.

    Science.gov (United States)

    Dhir, Sangeeta

    2013-01-01

    Mouth provides a congenial environment for the growth of the microorganisms as compared to any other part of the human body by exhibiting an ideal nonshedding surface. Dental plaque happens to be a diverse community of the microorganisms found on the tooth surface. Periodontal disease and the peri-implant disease are specific infections that are originating from these resident microbial species when the balance between the host and the microbial pathogenicity gets disrupted. This review discusses the biofilms in relation to the peri-implant region, factors affecting its presence, and the associated treatment to manage this complex microbial colony. Search Methodology: Electronic search of the medline was done with the search words: Implants and biofilms/dental biofilm formation/microbiology at implant abutment interface/surface free energy/roughness and implant, periimplantitis/local drug delivery and dental implant. Hand search across the journals - clinical oral implant research, implant dentistry, journal of dental research, international journal of oral implantology, journal of prosthetic dentistry, perioodntology 2000, journal of periodontology were performed. The articles included in the review comprised of in vivo studies, in vivo (animal and human) studies, abstracts, review articles.

  9. Surgical Templates for Dental Implant Positioning; Current ...

    African Journals Online (AJOL)

    Dental implants have been used in a variety of different forms for many years. Since the mid‑20th century, there has been an increase in interest in the implant process for the replacement of missing teeth. Branemark was one of the initial pioneers who applied scientifically based research techniques to develop an ...

  10. Factors Influencing Early Dental Implant Failures.

    Science.gov (United States)

    Chrcanovic, B R; Kisch, J; Albrektsson, T; Wennerberg, A

    2016-08-01

    The purpose of the present study was to assess the influence of local and systemic factors on the occurrence of dental implant failures up to the second-stage surgery (abutment connection). This retrospective study is based on 2,670 patients who received 10,096 implants and were consecutively treated with implant-supported prostheses between 1980 and 2014 at 1 specialist clinic. Several anatomic-, patient-, health-, and implant-related factors were collected. Descriptive statistics were used to describe the patients and implants. Univariate and multivariate logistic regression models were used at the patient level as well as the implant level to evaluate the effect of explanatory variables on the failure of implants up to abutment connection. A generalized estimating equation method was used for the implant-level analysis to account for the fact that repeated observations (several implants) were available for a single patient. Overall, 642 implants (6.36%) failed, of which 176 (1.74%) in 139 patients were lost up to second-stage surgery. The distribution of implants in sites of different bone quantities and qualities was quite similar between implants lost up to and after abutment connection. Smoking and the intake of antidepressants were the statistically significant predictors in the multivariate model (ClinicalTrials.gov NCT02369562). © International & American Associations for Dental Research 2016.

  11. 21 CFR 872.3640 - Endosseous dental implant.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Endosseous dental implant. 872.3640 Section 872...) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3640 Endosseous dental implant. (a) Identification. An endosseous dental implant is a device made of a material such as titanium or titanium alloy, that...

  12. 21 CFR 872.3980 - Endosseous dental implant accessories.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Endosseous dental implant accessories. 872.3980... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3980 Endosseous dental implant accessories. (a) Identification. Endosseous dental implant accessories are manually powered devices intended...

  13. 21 CFR 872.3630 - Endosseous dental implant abutment.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Endosseous dental implant abutment. 872.3630... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3630 Endosseous dental implant abutment. (a) Identification. An endosseous dental implant abutment is a premanufactured prosthetic component...

  14. Dental implants in patients with bruxing habits.

    Science.gov (United States)

    Lobbezoo, F; Brouwers, J E I G; Cune, M S; Naeije, M

    2006-02-01

    Bruxism (teeth grinding and clenching) is generally considered a contraindication for dental implants, although the evidence for this is usually based on clinical experience only. So far, studies to the possible cause-and-effect relationship between bruxism and implant failure do not yield consistent and specific outcomes. This is partly because of the large variation in the literature in terms of both the technical aspects and the biological aspects of the study material. Although there is still no proof for the suggestion that bruxism causes an overload of dental implants and of their suprastructures, a careful approach is recommended. There are a few practical guidelines as to minimize the chance of implant failure. Besides the recommendation to reduce or eliminate bruxism itself, these guidelines concern the number and dimensions of the implants, the design of the occlusion and articulation patterns, and the protection of the final result with a hard occlusal stabilization splint (night guard).

  15. Micromotion of Dental Implants: Basic Mechanical Considerations

    Directory of Open Access Journals (Sweden)

    Werner Winter

    2013-01-01

    Full Text Available Micromotion of dental implants may interfere with the process of osseointegration. Using three different types of virtual biomechanical models, varying contact types between implant and bone were simulated, and implant deformation, bone deformation, and stress at the implant-bone interface were recorded under an axial load of 200 N, which reflects a common biting force. Without friction between implant and bone, a symmetric loading situation of the bone with maximum loading and displacement at the apex of the implant was recorded. The addition of threads led to a decrease in loading and displacement at the apical part, but loading and displacement were also observed at the vertical walls of the implants. Introducing friction between implant and bone decreased global displacement. In a force fit situation, load transfer predominantly occurred in the cervical area of the implant. For freshly inserted implants, micromotion was constant along the vertical walls of the implant, whereas, for osseointegrated implants, the distribution of micromotion depended on the location. In the cervical aspect some minor micromotion in the range of 0.75 μm could be found, while at the most apical part almost no relative displacement between implant and bone occurred.

  16. 78 FR 2647 - Dental Devices; Reclassification of Blade-Form Endosseous Dental Implant

    Science.gov (United States)

    2013-01-14

    ...-Form Endosseous Dental Implant AGENCY: Food and Drug Administration, HHS. ACTION: Proposed order... dental implant, a preamendments class III device, into class II (special controls). On its own initiative... published a proposed rule for classification of endosseous dental implants (without distinguishing implants...

  17. Methods to measure stability of dental implants

    Directory of Open Access Journals (Sweden)

    Shruti Digholkar

    2014-01-01

    Full Text Available Dental implant treatment is an excellent option for prosthetic restoration that is associated with high success rates. Implant stability is essential for a good outcome. The clinical assessment of osseointegration is based on mechanical stability rather than histological criteria, considering primary stability (absence of mobility in bone bed after implant insertion and secondary stability (bone formation and remodeling at implant-bone interface. However, due to the invasive nature of the histological methods various other methods have been proposed: Radiographs, the surgeon′s perception, Insertion torque (cutting torque analysis, seating torque, reverse torque testing, percussion testing, impact hammer method, pulsed oscillation waveform, implant mobility checker, Periotest, resonance frequency analysis. This review focuses on the methods currently available for the evaluation of implant stability.

  18. Correction parameters in conventional dental radiography for dental implant

    Directory of Open Access Journals (Sweden)

    Barunawaty Yunus

    2009-12-01

    Full Text Available Background: Radiographic imaging as a supportive diagnostic tool is the essential component in treatment planning for dental implant. It help dentist to access target area of implant due to recommendation of many inventions in making radiographic imaging previously. Along with the progress of science and technology, the increasing demand of easier and simpler treatment method, a modern radiographic diagnostic for dental implant is needed. In fact, Makassar, especially in Faculty of Dentistry Hasanuddin University, has only a conventional dental radiography. Researcher wants to optimize the equipment that is used to obtain parameters of the jaw that has been corrected to get accurate dental implant. Purpose: This study aimed to see the difference of radiographic imaging of dental implant size which is going to be placed in patient before and after correction. Method: The type of research is analytical observational with cross sectional design. Sampling method is non random sampling. The amount of samples is 30 people, male and female, aged 20–50 years old. The correction value is evaluated from the parameter result of width, height, and thick of the jaw that were corrected with a metal ball by using conventional dental radiography to see the accuracy. Data is analyzed using SPSS 14 for Windows program with T-test analysis. Result: The result that is obtained by T-Test analysis results with significant value which p<0.05 in the width and height of panoramic radiography technique, the width and height of periapical radiography technique, and the thick of occlusal radiography technique before and after correction. Conclusion: It can be concluded that there is a significant difference before and after the results of panoramic, periapical, and occlusal radiography is corrected.

  19. Dental implant infection and decontaimination

    OpenAIRE

    Mongra, Avtar Chander

    2012-01-01

    The ability of bacteria to adhere titanium implant surfaces has been confirmed in various studies. Elimination of bacteria from the implant surface is necessary in order to terminate the source of infection and disrupt the formation of bio-film. Biomaterial therapies using fibers, gels, and beads to deliver antibiotics have been used in the treatment of Peri-implantitis..There is possibility of development of recombinant protein using r -DNA technology and using the application of tissue engi...

  20. Failure analysis of fractured dental zirconia implants.

    Science.gov (United States)

    Gahlert, M; Burtscher, D; Grunert, I; Kniha, H; Steinhauser, E

    2012-03-01

    The purpose of the present study was the macroscopic and microscopic failure analysis of fractured zirconia dental implants. Thirteen fractured one-piece zirconia implants (Z-Look3) out of 170 inserted implants with an average in situ period of 36.75±5.34 months (range from 20 to 56 months, median 38 months) were prepared for macroscopic and microscopic (scanning electron microscopy [SEM]) failure analysis. These 170 implants were inserted in 79 patients. The patient histories were compared with fracture incidences to identify the reasons for the failure of the implants. Twelve of these fractured implants had a diameter of 3.25 mm and one implant had a diameter of 4 mm. All fractured implants were located in the anterior side of the maxilla and mandibula. The patient with the fracture of the 4 mm diameter implant was adversely affected by strong bruxism. By failure analysis (SEM), it could be demonstrated that in all cases, mechanical overloading caused the fracture of the implants. Inhomogeneities and internal defects of the ceramic material could be excluded, but notches and scratches due to sandblasting of the surface led to local stress concentrations that led to the mentioned mechanical overloading by bending loads. The present study identified a fracture rate of nearly 10% within a follow-up period of 36.75 months after prosthetic loading. Ninety-two per cent of the fractured implants were so-called diameter reduced implants (diameter 3.25 mm). These diameter reduced implants cannot be recommended for further clinical use. Improvement of the ceramic material and modification of the implant geometry has to be carried out to reduce the failure rate of small-sized ceramic implants. Nevertheless, due to the lack of appropriate laboratory testing, only clinical studies will demonstrate clearly whether and how far the failure rate can be reduced. © 2011 John Wiley & Sons A/S.

  1. Porous Titanium for Dental Implant Applications

    Directory of Open Access Journals (Sweden)

    Zena J. Wally

    2015-10-01

    Full Text Available Recently, an increasing amount of research has focused on the biological and mechanical behavior of highly porous structures of metallic biomaterials, as implant materials for dental implants. Particularly, pure titanium and its alloys are typically used due to their outstanding mechanical and biological properties. However, these materials have high stiffness (Young’s modulus in comparison to that of the host bone, which necessitates careful implant design to ensure appropriate distribution of stresses to the adjoining bone, to avoid stress-shielding or overloading, both of which lead to bone resorption. Additionally, many coating and roughening techniques are used to improve cell and bone-bonding to the implant surface. To date, several studies have revealed that porous geometry may be a promising alternative to bulk structures for dental implant applications. This review aims to summarize the evidence in the literature for the importance of porosity in the integration of dental implants with bone tissue and the different fabrication methods currently being investigated. In particular, additive manufacturing shows promise as a technique to control pore size and shape for optimum biological properties.

  2. Comparative Clinical Study of Conventional Dental Implants and Mini Dental Implants for Mandibular Overdentures: A Randomized Clinical Trial.

    Science.gov (United States)

    Aunmeungtong, Weerapan; Kumchai, Thongnard; Strietzel, Frank P; Reichart, Peter A; Khongkhunthian, Pathawee

    2017-04-01

    Dental implant-retained overdentures have been chosen as the treatment of choice for complete mandibular removable dentures. Dental implants, such as mini dental implants, and components for retaining overdentures, are commercially available. However, comparative clinical studies comparing mini dental implants and conventional dental implants using different attachment for implant-retained overdentures have not been well documented. To compare the clinical outcomes of using two mini dental implants with Equator ® attachments, four mini dental implants with Equator attachments, or two conventional dental implants with ball attachments, by means of a randomized clinical trial. Sixty patients received implant-retained mandibular overdentures in the interforaminal region. The patients were divided into three groups. In Groups 1 and 2, two and four mini dental implants, respectively, were placed and immediately loaded by overdentures, using Equator ® attachments. In Group 3, conventional implants were placed. After osseointegration, the implants were loaded by overdentures, using ball attachments. The study distribution was randomized and double-blinded. Outcome measures included changes in radiological peri-implant bone level from surgery to 12 months postinsertion, prosthodontic complications and patient satisfaction. The cumulative survival rate in the three clinical groups after one year was 100%. There was no significant difference (p dental implants with Equator attachments. However, there was a significant difference in marginal bone loss and patient satisfaction between those receiving mini dental implants with Equator attachments and conventional dental implants with ball attachments. The marginal bone resorption in Group 3 was significantly higher than in Groups 1 and 2 (p dental implants can be immediately used successfully for retaining lower complete dentures, as shown after a 1-year follow up. © 2016 Wiley Periodicals, Inc.

  3. Dental implants from functionally graded materials.

    Science.gov (United States)

    Mehrali, Mehdi; Shirazi, Farid Seyed; Mehrali, Mohammad; Metselaar, Hendrik Simon Cornelis; Kadri, Nahrizul Adib Bin; Osman, Noor Azuan Abu

    2013-10-01

    Functionally graded material (FGM) is a heterogeneous composite material including a number of constituents that exhibit a compositional gradient from one surface of the material to the other subsequently, resulting in a material with continuously varying properties in the thickness direction. FGMs are gaining attention for biomedical applications, especially for implants, owing to their reported superior composition. Dental implants can be functionally graded to create an optimized mechanical behavior and achieve the intended biocompatibility and osseointegration improvement. This review presents a comprehensive summary of biomaterials and manufacturing techniques researchers employ throughout the world. Generally, FGM and FGM porous biomaterials are more difficult to fabricate than uniform or homogenous biomaterials. Therefore, our discussion is intended to give the readers about successful and obstacles fabrication of FGM and porous FGM in dental implants that will bring state-of-the-art technology to the bedside and develop quality of life and present standards of care. Copyright © 2013 Wiley Periodicals, Inc.

  4. PEEK with Reinforced Materials and Modifications for Dental Implant Applications

    Directory of Open Access Journals (Sweden)

    Fitria Rahmitasari

    2017-12-01

    Full Text Available Polyetheretherketone (PEEK is a semi-crystalline linear polycyclic thermoplastic that has been proposed as a substitute for metals in biomaterials. PEEK can also be applied to dental implant materials as a superstructure, implant abutment, or implant body. This article summarizes the current research on PEEK applications in dental implants, especially for the improvement of PEEK surface and body modifications. Although various benchmark reports on the reinforcement and surface modifications of PEEK are available, few clinical trials using PEEK for dental implant bodies have been published. Controlled clinical trials, especially for the use of PEEK in implant abutment and implant bodies, are necessary.

  5. "Dental implant radiology" - Emerging concepts in planning implants

    Directory of Open Access Journals (Sweden)

    Amara Swapna Lingam

    2013-01-01

    Full Text Available Dental radiology has long played an exciting and critical diagnostic role in dentistry. This has been never truer than now with the rapidly expanding array of imaging modalities. Radiography offers the sole method of (non-surgical analysis of bone required for implant therapy. The choice of when to image, along with which imaging modality to use, depends on a combination of factors including determination of the bone quality and quantity to establish the most favorable position of implant placement, detection of the presence or absence of pathoses and accessibility at a reasonable cost to the patient. In addition, exposing patients to radiation dose as low as reasonably achievable should always be considered when selecting radiographic examinations. This article, reviews the current concepts on implant planning using different radiographic techniques and their applicability to facilitate the clinician′s work in successful implant placement.

  6. Morphofunctional aspects of dental implants.

    Science.gov (United States)

    Meyer, Georg; Fanghänel, Jochen; Proff, Peter

    2012-03-20

    Although oral implantology is among the most beneficial developments of modern dentistry, the widely spread opinion that the long-term outcome of implants is superior to that of natural teeth has been refuted. To evade uncritical extractions, the morphofunctional properties of natural teeth and implant-supported restorations are compared from a proprioceptive and occlusal trauma perspective. The periodontal ligament of natural teeth provides the central nerve system with feedback for sensory perception and motor control. Conversely, the lack of such proprioception causes lower tactile sensitivity and less coordinated masticatory muscle activity in implant-borne restorations and makes them more prone to occlusal overload and possible subsequent failure. Moreover, occlusal anomalies may be conducive to parafunctional activity, craniomandibular disorder, tinnitus, and headache. Oral implantology, therefore, has to take appropriate account of occlusal conditions and the biomechanical and neuromuscular aspects of masticatory function. Copyright © 2011. Published by Elsevier GmbH.

  7. The feasibility of immediately loading dental implants in edentulous jaws

    OpenAIRE

    Henningsen, Anders; Smeets, Ralf; Wahidi, Aria; Kluwe, Lan; Kornmann, Frank; Heiland, Max; Gerlach, Till

    2016-01-01

    Purpose Immediate loading of dental implants has been proved to be feasible in partially edentulous jaws. The purpose of this retrospective investigation was to assess the feasibility of immediately loading dental implants in fully edentulous jaws. Methods A total of 24 patients aged between 53 and 89 years received a total of 154 implants in their edentulous maxillae or mandibles. Among the implants, 45 were set in fresh extracted sockets and 109 in consolidated alveolar bones. The implants ...

  8. Public perceptions of dental implants: a qualitative study.

    Science.gov (United States)

    Wang, Guihua; Gao, Xiaoli; Lo, Edward C M

    2015-07-01

    Dental implants have become a popular option for treating partially dentate or edentulous patients. Information on dental implants is widely available in the public domain and is disseminated through industries and dental practitioners at various levels/disciplines. This qualitative study aimed to evaluate the public's information acquisition and their perceptions of dental implants and the effects of these on their care-seeking and decision making. A purposive sample of 28 adults were recruited to join six focus groups. To be eligible, one must be 35-64 years of age, had never been engaged in dentally related jobs, had at least one missing tooth, and had heard about dental implant but never received dental implant or entered into any dental consultation regarding dental implants. All of the focus groups discussions were transcribed verbatim and subjected to thematic content analysis following a grounded theory approach. Participants acquired information on dental implants through various means, such as patient information boards, printed advertisements, social media, and personal connections. They expected dental implants to restore the patients' appearance, functions, and quality of life to absolute normality. They regarded dental implants as a panacea for all cases of missing teeth, overestimated their functions and longevity, and underestimated the expertise needed to carry out the clinical procedures. They were deterred from seeking dental implant treatment by the high price, invasive procedures, risks, and complications. Members of the public were exposed to information of varying quality and had some unrealistic expectations regarding dental implants. Such perceptions may shape their care-seeking behaviours and decision-making processes in one way or another. The views and experiences gathered in this qualitative study could assist clinicians to better understand the public's perspectives, facilitate constructive patient-dentist communication, and contribute

  9. Dental implants in medically complex patients-a retrospective study.

    Science.gov (United States)

    Manor, Yifat; Simon, Roy; Haim, Doron; Garfunkel, Adi; Moses, Ofer

    2017-03-01

    Dental implant insertion for oral rehabilitation is a worldwide procedure for healthy and medically compromised patients. The impact of systemic disease risks on the outcome of implant therapy is unclear, since there are few if any published randomized controlled trials (RCTs). The objective of this study is to investigate the rate of complications and failures following dental implantation in medically compromised patients in order to elucidate risk factors and prevent them. A retrospective cohort study was conducted from patient files treated with dental implantation between the years 2008-2014. The study group consisted of medically complex patients while the control group consisted of healthy patients. Preoperative, intraoperative, and post operative clinical details were retrieved from patients' files. The survival rate and the success rate of the dental implants were evaluated clinically and radiographically. A total of 204 patients (1003 dental implants) were included in the research, in the study group, 93 patients with 528 dental implants and in the control group, 111 patients with 475 dental implants. No significant differences were found between the groups regarding implant failures or complications. The failure rate of dental implants among the patients was 11.8 % in the study group and 16.2 % in the control group (P = 0.04). It was found that patients with a higher number of implants (mean 6.8) had failures compared with patients with a lower number of implants (mean 4.2) regardless of their health status (P dental implantation in medically complex patients and in healthy patients. Medically complex patients can undergo dental implantation. There are similar rates of complications and failures of dental implants in medically complex patients and in healthy patients.

  10. Biofilm and dental implant: The microbial link

    OpenAIRE

    Dhir, Sangeeta

    2013-01-01

    Mouth provides a congenial environment for the growth of the microorganisms as compared to any other part of the human body by exhibiting an ideal nonshedding surface. Dental plaque happens to be a diverse community of the microorganisms found on the tooth surface. Periodontal disease and the peri-implant disease are specific infections that are originating from these resident microbial species when the balance between the host and the microbial pathogenicity gets disrupted. This review discu...

  11. Dental implant superstructures by superplastic forming

    Energy Technology Data Exchange (ETDEWEB)

    Curtis, R.V.; Garriga-Majo, D.; Soo, S.; Pagliaria, D. [Kings Coll., London (United Kingdom). Dept. of Dental Biomaterials Science; Juszczyk, A.S.; Walter, J.D. [Kings Coll., London (United Kingdom). Dept. of Prosthetic Dentistry

    2001-07-01

    A novel application of superplastic forming is described for the production of fixed-bridge dental implant superstructures. Finite element analysis (FEA) has shown that Ti-6Al-4V sheet would be a suitable candidate material for the design of a fixed-bridge dental implant superstructure. Traditionally superstructures are cast in gold alloy onto pre-machined gold alloy cylinders but castings are often quite bulky and 25% of castings do not fit accurately (1) which means that sectioning and soldering is required to obtain a fit that is clinically acceptable and will not prejudice the integrity of the commercially pure cp-titanium implants osseointegrated with the bone. Superplastic forming is shown to be a forming technique that would allow the production of strong, light-weight components of thin section with low residual stress that could be suitable for such applications. Considerable cost savings over traditional dental techniques can be achieved using a low-cost ceramic die material. The properties of these die materials are optimised so that suitable components can be produced. Satisfactory hot strength is demonstrated and thermal properties are matched to those of the titanium alloy for accurate fit of the prosthesis. (orig.)

  12. Assessment of Final Year Dental Students' Views of Science Education in Dental Implants

    Directory of Open Access Journals (Sweden)

    MajidReza Mokhtari

    2012-01-01

    Full Text Available Introduction: The aim of the present study was to evaluate the dental student's concepts about dental implant education which can be used in dentistry doctorate curriculum revision and could be useful for professors of periodontology, prosthodontics and maxillofacial surgery.Materials & Methods: This was an educational research which was conducted in Mashhad dental school in 2011 and 58 end year dental students were participated in this study and filled out questionnaires about dental implant education and the concepts of these students about theoretical and practical aspects of dental implant education were evaluated.Results: A total of 98.27% of the students were agreed about education of simple implant surgery so that they could put a simple implant and 87.94% of the students were agreed about education of dental implant as a single course credit and about creation of a dental educational group, 96.56% were agreed. About dental implant educational topics, the most educational need was education of principles of implant surgery followed by education of putting a simple frontal implant, and the least, was introduction and history of dental implants.Conclusions: Because of necessity of development for new sciences in order to promote health in the society, education of dental implant for general dentistry students and revision of general dentistry curriculum seems necessary.

  13. Medicolegal implications of dental implant therapy.

    Science.gov (United States)

    Rees, Jonathan

    2013-04-01

    Despite the recent economic downturn, the dental implant market continues to grow year on year. Many more dentists are involved in the placement restoration of dental implants and dental implants are being placed in an extended range of clinical scenarios. Dental implant therapy remains a high risk area for the inexperienced interns of civil negligence claims and General Dental Council hearings. Risk can be mitigated by:• Ensuring appropriate indemnity • Complying with the published requirements for training • Maintaining detailed and extensive clinical records • Completing the initial phases of history, examination and investigations robustly • Recording a diagnosis • Providing a bespoke written treatment plan that includes details of the need for treatment, the treatment options (the risks and benefits), the phases of treatment, the costs of treatment,the expected normal sequelae of surgery, the risks and complications of implant therapy and the requirement for future maintenance. The provision of treatment that is different in nature or extent to that agreed can result in a breach of contract as well as a claim for negligence • Engaging sufficiently with the patient to obtain consent • Providing written postoperative instructions detailing emergency arrangements, patients who are anxious or in pain may not retain oral information • Making a frank disclosure of complication or collateral damage • Considering referral at an early stage particularly if reparative surgery is required. The stress of complications or failure may impair a dentist's normally sound judgement; there may be financial pressure, or concerns regarding reputation. In some cases, dentists avoid making a frank disclosure, feel obliged to undertake complicated reparative surgery, fail to make a timely referral, fail to respond appropriately to patient's concerns and in some cases attempt to alter the clinical records.However, in the best of hands and without negligence

  14. Is Dental Implantation Indicated in Patients with Oral Mucosal Diseases

    OpenAIRE

    Kalogirou Eleni-Marina; Sklavounou Alexandra

    2017-01-01

    Background/Aim: Dental implants are a reliable treatment choice for rehabilitation of healthy patients as well as subjects with several systemic conditions. Patients with oral mucosal diseases often exhibit oral mucosal fragility and dryness, erosions, blisters, ulcers or microstomia that complicate the use of removable dentures and emphasize the need for dental implants. The aim of the current study is to review the pertinent literature regarding the dental implantation prospects for patient...

  15. Correlation between radiographic analysis of alveolar bone density around dental implant and resonance frequency of dental implant

    Science.gov (United States)

    Prawoko, S. S.; Nelwan, L. C.; Odang, R. W.; Kusdhany, L. S.

    2017-08-01

    The histomorphometric test is the gold standard for dental implant stability quantification; however, it is invasive, and therefore, it is inapplicable to clinical patients. Consequently, accurate and objective alternative methods are required. Resonance frequency analysis (RFA) and digital radiographic analysis are noninvasive methods with excellent objectivity and reproducibility. To analyze the correlation between the radiographic analysis of alveolar bone density around a dental implant and the resonance frequency of the dental implant. Digital radiographic images for 35 samples were obtained, and the resonance frequency of the dental implant was acquired using Osstell ISQ immediately after dental implant placement and on third-month follow-up. The alveolar bone density around the dental implant was subsequently analyzed using SIDEXIS-XG software. No significant correlation was reported between the alveolar bone density around the dental implant and the resonance frequency of the dental implant (r = -0.102 at baseline, r = 0.146 at follow-up, p > 0.05). However, the alveolar bone density and resonance frequency showed a significant difference throughout the healing period (p = 0.005 and p = 0.000, respectively). Conclusion: Digital dental radiographs and Osstell ISQ showed excellent objectivity and reproducibility in quantifying dental implant stability. Nonetheless, no significant correlation was observed between the results obtained using these two methods.

  16. Evaluating mechanical properties and degradation of YTZP dental implants

    Energy Technology Data Exchange (ETDEWEB)

    Sevilla, Pablo, E-mail: pablo.sevilla@upc.edu [Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia (Spain); Sandino, Clara; Arciniegas, Milena [Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia (Spain); Martinez-Gomis, Jordi; Peraire, Maria [Department of Prosthodontics, Faculty of Odontology, University of Barcelona (Spain); Gil, Francisco Javier [Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia (Spain)

    2010-01-01

    Lately new biomedical grade yttria stabilized zirconia (YTZP) dental implants have appeared in the implantology market. This material has better aesthetical properties than conventional titanium used for implants but long term behaviour of these new implants is not yet well known. The aim of this paper is to quantify the mechanical response of YTZP dental implants previously degraded under different time conditions and compare the toughness and fatigue strength with titanium implants. Mechanical response has been studied by means of mechanical testing following the ISO 14801 for Standards for dental implants and by finite element analysis. Accelerated hydrothermal degradation has been achieved by means of water vapour and studied by X-ray diffraction and nanoindentation tests. The results show that the degradation suffered by YTZP dental implants will not have a significant effect on the mechanical behaviour. Otherwise the fracture toughness of YTZP ceramics is still insufficient in certain implantation conditions.

  17. [Dental Implant Treatment in Patients Receiving Anti-resorptive Agents.

    Science.gov (United States)

    Kuroshima, Shinichiro

    Dental implant treatment is one of the most reliable therapeutic options for replacing missing teeth. In 2003, it was demonstrated that osteonecrosis of the jaw(ONJ)occurred in patients taking bisphosphonates(BRONJ). Recently, ONJ has also been demonstrated to occur in patients taking anti-receptor activator of nuclear factor-kappaB ligand antibody(denosumab:DRONJ). However, the precise mechanisms of ONJ remain unclear and definitive treatment strategies for ONJ have not been developed. There has been little information regarding the relationship between ONJ and dental implant treatment. However, a recent systematic review indicated that dental implant treatment is a triggering factor for BRONJ. The aim of this study was to provide the most current information on dental implant treatment in patients receiving anti-resorptive agents. A literature search has suggested that implant treatment becomes a risk factor for BRONJ around dental implants. Implantitis may also be a risk factor for BRONJ around dental implants. No available information regarding DRONJ around dental implants was noted. Hence, caution should be exercised when dental implant treatment is carried out in the patients taking anti-resorptive agents such as bisphosphonates and denosumab.

  18. The medically compromised patient: Are dental implants a feasible option?

    Science.gov (United States)

    Vissink, A; Spijkervet, Fkl; Raghoebar, G M

    2018-03-01

    In healthy subjects, dental implants have evolved to be a common therapy to solve problems related to stability and retention of dentures as well as to replace failing teeth. Although dental implants are applied in medically compromised patients, it is often not well known whether this therapy is also feasible in these patients, whether the risk of implant failure and developing peri-implantitis is increased, and what specific preventive measures, if any, have to be taken when applying dental implants in these patients. Generally speaking, as was the conclusion by the leading review of Diz, Scully, and Sanz on placement of dental implants in medically compromised patients (J Dent, 41, 2013, 195), in a few disorders implant survival may be lower, and the risk of a compromised peri-implant health and its related complications be greater, but the degree of systemic disease control outweighs the nature of the disorder rather than the risk accompanying dental implant treatment. So, as dental implant treatment is accompanied by significant functional benefits and improved oral health-related quality of life, dental implant therapy is a feasible treatment in almost any medically compromised patient when the required preventive measures are taken and follow-up care is at a high level. © 2018 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. All rights reserved.

  19. Tissue response: biomaterials, dental implants, and compromised osseous tissue.

    Science.gov (United States)

    Babu RS, Arvind; Ogle, Orrett

    2015-04-01

    Tissue response represents an important feature in biocompatibility in implant procedures. This review article highlights the fundamental characteristics of tissue response after the implant procedure. This article also highlights the tissue response in compromised osseous conditions. Understanding the histologic events after dental implants in normal and abnormal bone reinforces the concept of case selection in dental implants. Copyright © 2015 Elsevier Inc. All rights reserved.

  20. [Occlusion patterns of dental arches containing implant-supported restoration].

    Science.gov (United States)

    Arutiunov, S D; Panin, A M; Antonik, M M; Iun, T E; Adamian, R A; Shirokov, I Iu

    2012-01-01

    An experimental and clinical study was carried out on 76 patients with implant-supported restorations in the posterior zones of the lower jaw, divided in two groups (with no signs of bone resorption around the implants and with resorption signs) and one control group. The results of the study allowed optimizing the angulation of dental implants, providing an opportunity for individual positioning of dental implant in the mandible depending on the direction of functional load.

  1. Osseointegration of dental implants in Macaca fascicularis

    Science.gov (United States)

    Dewi, R. S.; Odang, R. W.; Odelia, L.

    2017-08-01

    Osseointegration is an important factor in determining the success of a dental implant. It can be assessed from the osseointegration that occurs between the implant and the bone. The implant stability is determined by the osseous support at the implant-bone interface, which is commonly evaluated by histomorphometric analysis. This study aimed to evaluate whether the osseointegration level measured by a Low Resonance Frequency Analyzer (LRFA) gave results as good as those obtained by histomorphometric examination. Six male Macaca fascicularis were used in this study. In each animal, two types of loading were performed: immediate and delayed loading. Clinical examination and LRFA measurement were performed to determine osseointegration at the first and second weeks and at the first, second, third, and fourth months. After four months, histomorphometric examination was performed. The relationship between the histomorphometric examination and LRFA measurement was compared using the Pearson correlation coefficient. There was no significant difference in the osseointegration between immediate loading and delayed loading (p > 0.05) The bone-implant contact percentage in the first group did not differ significantly from that in the second group. Statistical analysis showed that there was a strong correlation between LRFA measurement and histomorphometric examination. Osseointegration could be evaluated through LRFA measurement as well as through histomorphometric examination.

  2. Icariin: Can an herbal extract enhance dental implant outcomes?

    Directory of Open Access Journals (Sweden)

    Qiang Wang

    2012-01-01

    Full Text Available Introduction: The success rate of dental implant is closely related to three aspects including supporting bone before implantation, osseointegration process, and prevention of peri-implantitis after implantation. Icariin is one of the traditional Chinese herbal medicines to treat impotence, improve sexual function, and enhance immune function. Recently, there are abundant evidences showing that icariin can strengthen bones, enhance bone healing, inhibit osteopenia, and inhibit inflammation. The Hypothesis: We hypothesize that Icariin may be applied clinically to strengthen and accelerate osseointegration of dental implants, inhibit the peri-implantitis, and shorten the rehabilitation time. Evaluation of the Hypothesis: Limited success has been achieved to help implant surgery in spite of much effort. The application of icariin might be a potential method to improve the success rate of dental implant, contributing greatly to implant dentistry.

  3. Oral rehabilitation with dental implants after cancer treatment.

    Science.gov (United States)

    Barrowman, R A; Wilson, P R; Wiesenfeld, D

    2011-06-01

    Patients who undergo surgical management of oral cancer may greatly benefit from an implant-supported prosthesis. This study reports on the clinical experience of dental implant placement in patients following resection of oral cancer over a 15-year period. Controversies including the use of dental implants in irradiated tissues, and hyperbaric oxygen treatment will also be discussed. Thirty-one patients who had dental implants placed as part of their oral rehabilitation between 1992 and 2007 were investigated. Demographic data and factors including implant survival, type of prosthesis provided, radiotherapy and the hyperbaric oxygen therapy were analysed. In this retrospective study, there was a retention rate of 110 implants from a total of 115 implants placed. A high rate of implant retention was found, with 5 implant failures from a total of 115 implants placed. The 5 failed implants occurred in free flap bone that had been irradiated. Dental implants provide an important role in the oral rehabilitation of oral cancer patients. There may be an increased risk of implant failure in free flap bone that has been irradiated. © 2011 Australian Dental Association.

  4. Oral rehabilitation with dental implants in oligodontia patients

    NARCIS (Netherlands)

    Finnema, KJ; Raghoebar, GM; Meijer, HJA; Vissink, A

    2005-01-01

    Purpose: The aim of this retrospective report was to evaluate the treatment outcome of oral rehabilitation with dental implants in oligodontia patients. Materials and Methods: Thirteen oligodontia patients treated with dental implants were examined clinically and radiographically (follow-up 3 +/- 2

  5. Microcomputed Tomography-Based Assessment of Retrieved Dental Implants

    NARCIS (Netherlands)

    Narra, N.; Antalainen, A.K.; Zipprich, H.; Sandor, G.K.; Wolff, J.

    2015-01-01

    PURPOSE: The aim of this study was to demonstrate the potential of microcomputed tomography (micro-CT) technology in the assessment of retrieved dental implants. Cases are presented to illustrate the value of micro-CT imaging techniques in determining possible mechanical causes for dental implant

  6. Microcomputed tomography-based assessment of retrieved dental implants

    NARCIS (Netherlands)

    Narra, N.; Antalainen, A.K.; Zipprich, H.; Sándor, G.K.; Wolff, J.

    2015-01-01

    Purpose: The aim of this study was to demonstrate the potential of microcomputed tomography (micro-CT) technology in the assessment of retrieved dental implants. Cases are presented to illustrate the value of micro-CT imaging techniques in determining possible mechanical causes for dental implant

  7. Short dental implants versus standard dental implants placed in the posterior jaws: A systematic review and meta-analysis.

    Science.gov (United States)

    Lemos, Cleidiel Aparecido Araujo; Ferro-Alves, Marcio Luiz; Okamoto, Roberta; Mendonça, Marcos Rogério; Pellizzer, Eduardo Piza

    2016-04-01

    The purpose of the present systematic review and meta-analysis was to compare short implants (equal or less than 8mm) versus standard implants (larger than 8mm) placed in posterior regions of maxilla and mandible, evaluating survival rates of implants, marginal bone loss, complications and prosthesis failures. This review has been registered at PROSPERO under the number CRD42015016588. Main search terms were used in combination: dental implant, short implant, short dental implants, short dental implants posterior, short dental implants maxilla, and short dental implants mandible. An electronic search for data published up until September/2015 was undertaken using the PubMed/Medline, Embase and The Cochrane Library databases. Eligibility criteria included clinical human studies, randomized controlled trials and/or prospective studies, which evaluated short implants in comparison to standard implants in the same study. The search identified 1460 references, after inclusion criteria 13 studies were assessed for eligibility. A total of 1269 patients, who had received a total of 2631 dental implants. The results showed that there was no significant difference of implants survival (P=.24; RR:1.35; CI: 0.82-2.22), marginal bone loss (P=.06; MD: -0.20; CI: -0.41 to 0.00), complications (P=.08; RR:0.54; CI: 0.27-1.09) and prosthesis failures (P=.92; RR:0.96; CI: 0.44-2.09). Short implants are considered a predictable treatment for posterior jaws. However, short implants with length less than 8 mm (4-7 mm) should be used with caution because they present greater risks to failures compared to standard implants. Short implants are frequently placed in the posterior area in order to avoid complementary surgical procedures. However, clinicians need to be aware that short implants with length less than 8mm present greater risk of failures. Copyright © 2016. Published by Elsevier Ltd.

  8. Soft tissue sealing around dental implants based on histological interpretation.

    Science.gov (United States)

    Atsuta, Ikiru; Ayukawa, Yasunori; Kondo, Ryosuke; Oshiro, Wakana; Matsuura, Yuri; Furuhashi, Akihiro; Tsukiyama, Yoshihiro; Koyano, Kiyoshi

    2016-01-01

    The aim of this study was to provide an overview on the biology and soft tissue sealing around dental implants and teeth. This is a narrative review performed through scientific articles published between 1977 and 2014, indexed in MEDLINE and PubMed databases. The study selected articles that focused on epithelial sealing around dental implant or teeth with cell biology and histology of soft tissue. Implant therapy has been widely applied in dental rehabilitation for many years, with predictable long-term results. The longevity and functionality of dental implants is dependent on both osseointegration around the implant body and the establishment of a soft tissue barrier that protects the underlying hard tissue structures and the implant itself. The health and stability of the peri-implant mucosa also affects the esthetics of the implant. The healing and maintenance of the epithelial and connective tissues around implants are increasingly recognized as being fundamental to implant success. However, there has been little research into the function or formation of the soft tissue seal around dental implants, and the roles of this unique mucosal interface remain unclear. This narrative review explores the extent of the current knowledge of soft tissue barriers around implants from both a basic and clinical perspective, and aims to consolidate this knowledge and highlight the most pertinent questions relating to this area of research. Copyright © 2015 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.

  9. [The influence of dental implant surface on osseointegration: review].

    Science.gov (United States)

    Livne, S; Marku-Cohen, S; Harel, N; Piek, D; Ormianer, Z

    2012-01-01

    Dental implant therapy is a prevalent and successful treatment, based on research and clinical experience. Ossointegration is the main factor that responsible for success or failure, initially of the implant, and in some cases followed with the whole treatment failure. The osseointegration process is influenced by several factors, among them the surface texture. Dental implants are available with different surface modifications that have been developed for enhancing clinical performances. This paper reviews the main treatments used for changing dental titanium implant surfaces, and compare the clinical performance of different types of implants. Based on existent literature, modified implant surface improves significantly the ability to achive optimise bone-implant contact and improve osseointegration. This review did not find any significant major differences between the surface modifications in use this days in terms of survival and success of specific implant. There are several methods that are no longer in use, due to poor clinical performance in the past.

  10. Subperiosteal leiomyosarcoma of the tibia

    Energy Technology Data Exchange (ETDEWEB)

    Narvaez, J.A. [Hospital Universitari de Bellvitge, Department of Radiology, Barcelona (Spain); Hospital Universitari de Bellvitge, Department of MR Imaging, Institut de Diagnostic per la Imatge, Barcelona (Spain); Lama, E. De; Ortega, R. [Hospital Universitari de Bellvitge, Department of Radiology, Barcelona (Spain); Portabella, F. [Hospital Universitari de Bellvitge, Department of Orthopedic Surgery, Barcelona (Spain); Condom, E. [Hospital Universitari de Bellvitge, Department of Pathology, Barcelona (Spain)

    2005-01-01

    Primary leiomyosarcoma of bone is a rare malignant tumor of smooth muscle. We report a case of low-grade subperiosteal primary bone leiomyosarcoma in the tibial diaphysis, which radiologically appeared to be osteoid osteoma. A 35-year-old man presented with a several-year history of a palpable hard nodule in the distal left leg, which had enlarged and become painful over the previous 2 years. Radiographs showed solid periosteal reaction with a well-defined lytic lesion in the posteromedial cortical border of the left tibial diaphysis. Computed tomography demonstrated a small, well-defined lytic lesion, not calcified, in a subperiosteal location, surrounded by solid periosteal bone formation. The lesion was excised en bloc and the histological diagnosis of a low-grade leiomyosarcoma was made. To the best of our knowledge, the surface location of primary bone leiomyosarcoma has not been previously described in the literature. (orig.)

  11. Investigation of the Effects of Abutment and Implant Length on Stability of Short Dental Implants

    Directory of Open Access Journals (Sweden)

    Eda OZYILMAZ

    2015-01-01

    Full Text Available The use of dental implants to solve different problems in dentistry has been growing rapidly. The success rates of dental implants are also very important for patients. Depending on the bone level of patients, short dental implants are very popular and widely used by many dentists. Although many dentists are using short dental implants frequently, It can be guessed that there can be stability problems because of crown to implant ratios. In this study, it is aimed to find out the effects of dental implant and abutment lengths on stability of short dental implants. 3 different short dental implant design made with the use of Solidworks 2013. Abutment lengths were 3,5 mm, 4 mm, 4,5 mm, 5 mm and implant lengths were 5 mm, 6 mm, 7 mm for each model. Human mandible model is transferred from Computed Tomography. Then, each implant model is mounted to modeled mandible and Finite Element Analysis is performed for each model. In order to see the effects of implant number on stability, we performed same analysis by placing 4 implants to the mandible

  12. Primary oral squamous cell carcinoma arising around dental osseointegrated implants mimicking peri-implantitis

    OpenAIRE

    Eguía Del Valle, Asier; Martínez-Conde Llamosas, Rafael; López Vicente, José; Uribarri Etxebarria, Agurne; Aguirre Urízar, José Manuel

    2008-01-01

    Prosthodontic rehabilitation using dental implants has become a common practice in dentistry at the present time. The number of complications related to dental osseointegrated implants has increased according to the generalization of its use along the last decade. Among the most common of these complications are chronic inflammatory conditions affecting both hard and soft tissues around dental implants. Although severe complications are uncommon, in recent years several cases of oral squa...

  13. Idiopathic facial pain related with dental implantation

    Directory of Open Access Journals (Sweden)

    Tae-Geon Kwon

    2016-06-01

    Full Text Available Chronic pain after dental implantation is rare but difficult issue for the implant practitioner. Patients with chronic pain who had been performed previous implant surgery or related surgical intervention sometimes accompany with psychological problem and difficult to adequately manage. According to the International Classification of Headache Disorders (ICHD 3rd eds, Cepalagia 2013, painful neuropathies and other facial pains are subdivided into the 12 subcategories; 13.1. Trigeminal neuralgia; 13.2 Glossopharyngeal neuralgia; 13.3 Nervus intermedius (facial nerve neuralgia; 13.4 Occipital neuralgia; 13.5 Optic neuritis; 13.6 Headache attributed to ischaemic ocular motor nerve palsy; 13.7 Tolosa-Hunt syndrome; 13.8 Paratrigeminal oculo-sympathetic (Raeder’s syndrome; 13.9 Recurrent painful ophthalmoplegic neuropathy; 13.10 Burning Mouth Syndrome (BMS; 13.11 Persistent Idiopathic Facial Pain (PIFP; 13.12 Central neuropathic pain. Chronic orofacial pain after dental implant surgery can be largely into the two main categories that can be frequently encountered in clinical basis ; 1 Neuropathic pain, 2 Idiopathic pain. If there is no direct evidence of the nerve injury related with the implant surgery, the clinician need to consider the central cause of pain instead of the peripheral cause of the pain. There might be several possibilities; 1 Anaesthesia dolorosa, 2 Central post-stroke pain, 3 Facial pain attributed to multiple sclerosis, 4 Persistent idiopathic facial pain (PIFP, 5 Burning mouth syndrome. In this presentation, Persistent idiopathic facial pain (PIFP, the disease entity that can be frequently encountered in the clinic would be discussed. Persistent idiopathic facial pain (PIFP can be defined as “persistent facial and/or oral pain, with varying presentations but recurring daily for more than 2 hours per day over more than 3 months, in the absence of clinical neurological deficit”. ‘Atypical’ pain is a diagnosis of

  14. Management of dental implant fractures. A case history.

    Science.gov (United States)

    Al Quran, Firas A M; Rashan, Bashar A; Al-Dwairi, Ziad N

    2009-01-01

    The widespread use of endosseous osseointegrated implants to replace missing natural teeth increases the chances of implant complications and failures, despite the high initial success rate reported in the literature. Implant fracture is one possible complication that results in ultimate failure of the dental implant. Such a complication poses a management crisis even for the most experienced clinician. This article reports on a case of implant fracture, its possible causes, and how the case was managed.

  15. Immediate X delayed loading dental implants: An overview

    OpenAIRE

    Perez, Luciano Elias da Cruz; Reis, José Mauricio dos Santos Nunes [UNESP; Segalla, José Claudio Martins [UNESP; Pinelli, Ligia Antunes Pereira [UNESP; Silva, Regina Helena Barbosa Tavares da [UNESP

    2007-01-01

    The aim of this investigation was to accomplish an overview about the principles of the indication and of the success parameters involving immediate and delayed loading dental implants procedures. Studies about the philosophies (immediate and delayed loading dental implants) and their clinical indications will be discussed in order to overview the rules for the clinical success in both techniques. In addition, studies regarding the criteria for immediate loading implants as primary stabilizat...

  16. Assessment of Patients Referred to Specialty Dental Hospitals for Dental Implant Procedure: A Retrospective Cohort Analysis.

    Science.gov (United States)

    Thukral, Rishi; Kumar, Anuj; Prasant, M C; Punjabi, Krunal M; Paliwal, Aparna; Patel, Kunal

    2016-06-01

    One of the most common and effective ways of replacing missing teeth is by dental implants. Both quality and quantity of bone along with the area of implant placement govern the prognosis of the implant procedure. Certain risk factors predispose the implant treatment to high failure rate. Hence, we assessed the implant patients who were referred from private practitioners to the specialty hospitals from 2010 to 2014. All the patients being referred from private clinics to the specialty dental hospital for the purpose of prosthetic rehabilitation by dental implants from June 2010 to July 2014 were included in the present study. Skilled oral and maxillofacial surgeons were appointed for performing the implant surgical procedures. Prosthetic rehabilitation was done after 6 to 8 weeks and after 10 to 14 weeks in implant cases without and with bone augmentation procedures respectively. Distribution of dental implants based on the indications, location, dimension of augmentation procedure, and complication of implants was analyzed and assessed for the level of significance. Of the patients, 712 were females, while the remaining were males. Most of the patients were in the age group of 50 to 59 years. As compared with completely edentulous patients, most of the patients required rehabilitation by a single implant. Maximum dental implants were placed in maxillary premolar region and mandibular first molar region. Over 1,000 cases in this study required rehabilitation by augmentation procedure. Partially edentulous patients are most commonly referred to specialized dental hospitals for prosthetic rehabilitation by dental implants, mostly with the purpose of implant placement. Failure rate can be minimized by following strict patient selection protocols along with following a standard surgical criterion. Following standard surgical protocols and strict treatment planning, prognosis of the dental implant procedures can be improved to a greater extent, thereby increasing its

  17. Knowledge and attitude of elderly persons towards dental implants.

    Science.gov (United States)

    Müller, Frauke; Salem, Kamel; Barbezat, Cindy; Herrmann, François R; Schimmel, Martin

    2012-06-01

    Despite their unrivalled place in restorative treatment, dental implants are still scarcely used in elderly patients. The aim of this survey was therefore to identify potential barriers for accepting an implant treatment. Participants were recruited from a geriatric hospital, two long-term-care facilities and a private clinic. The final study sample comprised 92 persons, 61 women and 31 men with an average age of 81.2 ± 8.0 years. In a semi-structured interview, the participants' knowledge of implants and attitude towards a hypothetical treatment with dental implants were evaluated. Twenty-seven participants had never heard of dental implants, and another 13 participants could not describe them. The strongest apprehensions against implants were cost, lack of perceived necessity and old age. Univariate and multiple linear regression analysis identified being women, type and quality of denture, having little knowledge on implants and being hospitalised as the risk factors for refusing implants. However, old age as such was not associated with a negative attitude. The acceptance of dental implants in the elderly population might be increased by providing further information and promoting oral health in general. Regardless of the age, dental implants should be placed when patients are still in good health and live independently. © 2011 The Gerodontology Society and John Wiley & Sons A/S.

  18. Evaluation of dental implant insertion torque using a manual ratchet.

    Science.gov (United States)

    Goswami, M M; Kumar, Mukul; Vats, Abhinav; Bansal, A S

    2015-12-01

    Dental implant insertion torque is crucial for the success of the implant and the prosthesis. This in-vivo study was undertaken to determine the average insertion torque being applied to the dental implant while surgically placing it with a non-calibrated manual ratchet. Three dental surgeons placed a total of 45 dental implants (Touareg, ADIN, Afula, Israel) in 42 selected patients. Each surgeon placed 15 implants. Standardised protocols were followed to prepare the site to place the dental implant. Each implant was placed using a manual non-calibrated implant ratchet first. Once the implant was nearly placed, a manual calibrated torque gauge ratchet was used to place the implant in its final position and at that instance, the maximum final torque applied was noted on the torque gauge scale. The mean dental implant insertion torque applied by three surgeons using a non-calibrated manual ratchet was estimated to be 63.26 Ncm with a standard error of 6.80 i.e. (63.26 + 6.8), which was significantly higher than the baseline of 35 Ncm (p dental implant torque applied by Surgeon 1, 2 and 3, respectively, was 65.93 Ncm, 62.60 Ncm and 62.13 Ncm and this difference amongst them was found to be statistically insignificant (p > 0.05) and each of them had reached more than the baseline level of 35 Ncm individually and significantly (p < 0.0001). Without the use of torque measuring devices, an average surgeon may achieve an average insertion torque of 63.26 + 6.8 Ncm.

  19. Comparing Short Dental Implants to Standard Dental Implants: Protocol for a Systematic Review.

    Science.gov (United States)

    Rokn, Amir Reza; Keshtkar, Abbasali; Monzavi, Abbas; Hashemi, Kazem; Bitaraf, Tahereh

    2018-01-18

    Short dental implants have been proposed as a simpler, cheaper, and faster alternative for the rehabilitation of atrophic edentulous areas to avoid the disadvantages of surgical techniques for increasing bone volume. This review will compare short implants (4 to 8 mm) to standard implants (larger than 8 mm) in edentulous jaws, evaluating on the basis of marginal bone loss (MBL), survival rate, complications, and prosthesis failure. We will electronically search for randomized controlled trials comparing short dental implants to standard dental implants in the following databases: PubMed, Web of Science, EMBASE, Scopus, the Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov with English language restrictions. We will manually search the reference lists of relevant reviews and the included articles in this review. The following journals will also be searched: European Journal of Oral Implantology, Clinical Oral Implants Research, and Clinical Implant Dentistry and Related Research. Two reviewers will independently perform the study selection, data extraction and quality assessment (using the Cochrane Collaboration tool) of included studies. All meta-analysis procedures including appropriate effect size combination, sub-group analysis, meta-regression, assessing publication or reporting bias will be performed using Stata (Statacorp, TEXAS) version 12.1. Short implant effectiveness will be assessed using the mean difference of MBL in terms of weighted mean difference (WMD) and standardized mean difference (SMD) using Cohen's method. The combined effect size measures in addition to the related 95% confidence intervals will be estimated by a fixed effect model. The heterogeneity of the related effect size will be assessed using a Q Cochrane test and I2 measure. The MBL will be presented by a standardized mean difference with a 95% confidence interval. The survival rate of implants, prostheses failures, and complications will be reported using a risk

  20. BISPHOSPHONATE-RELATED OSTEONECROSIS OF THE JAW AND DENTAL IMPLANTS

    Directory of Open Access Journals (Sweden)

    Ala Hassan A. Qamheya

    2016-01-01

    Full Text Available Bisphosphonate (BP is one of the possible riskfactors in the osteonecrosis of the jaw (ON J. Surgical interventions during or after the course of treatment by using BPs may expose the patient under this risk. Animal studies, human studies, case reports, and systematic reviews are used to show the relationship between the use of bisphosphonates and dental implants. In this review data about bisphosphonaterelated osteonecrosis of the jaw (BRON J: incidence, prevention and treatment modalities for the patients who are scheduled for dental implant treatment plan and who have been already treated by dental implants will be investigated. Various views for the relationship between dental implants and bisphosphonates will be analyzed depending on the multifactors: duration, route of uptake, dosage of the drug and patient’s other medications that affect the effects of bisphosphonate. All patients treated with this drug must be informed about the risk of implant loss or possibility of osteonecrosis.

  1. Dental Implant Length and Diameter: A Proposed Classification Scheme.

    Science.gov (United States)

    Al-Johany, Sulieman S; Al Amri, Mohammad D; Alsaeed, Suliman; Alalola, Bassam

    2017-04-01

    To propose a length-and-diameter-based classification scheme for dental implants to standardize terminology in the dental literature and communication between interested parties. This study was mainly based on searching two major resources: published scientific research papers and 14 of the most popular dental implant manufacturers. Indexed databases were searched from January 2004 up to and including February 2016 using the keywords "dental implant length" and "dental implant diameter." Retrieved titles and abstracts were screened, and related full-text articles were reviewed. Full-text articles that clearly stated the terms and measurements of implants used were included and considered for proposing this classification scheme. The initial search for implant diameter and length yielded 1007 and 936 articles, respectively. A total of 85 studies (41 about diameter, 44 about length) were selected and reviewed. The remaining studies (966 about diameter, 892 about length) that did not abide by the eligibility criteria were excluded. The terms "long," "short," "standard," "wide," and "narrow" were the most commonly used terms in the literature. A classification scheme for implants by diameter and length was proposed. Indexed publications contain a variety of terms used by authors to describe diameter and length of dental implants without conformity and standardization. The classification scheme proposed in this article could serve as a reference for interested parties. © 2016 by the American College of Prosthodontists.

  2. Is old age a risk factor for dental implants?

    Directory of Open Access Journals (Sweden)

    Kazunori Ikebe

    2009-05-01

    Full Text Available Patient's condition is distinctly different among individuals especially in the elderly. Dental implant failure seems to be a multi-factorial problem; therefore, it is unclear that aging itself is a risk factor for the placement of implants. This review reorders and discusses age-related risk factors for the success of dental implants. In dental implant treatment, chronological age by itself is suggested as one of the risk factors for success, but it would not be a contraindication. In general, reserved capacity of bone and soft tissue make it possible to establish osseointegration in the long run. Rather than aging itself, the specific nature of the disease process, such as osteoporosis or diabetes, and local bone quality and quantity at the implant site, mostly related to aging, are more important for successful dental implant treatment. This review revealed a shortage of published data for the survival and success of dental implants in older patients. More studies useful for evidence-based decision making are needed to assess the survival and success of dental implants for aged patients with a compromised condition.

  3. Straightforward Case of Dental Implant in General Dentistry

    Directory of Open Access Journals (Sweden)

    Aji P. Tjikman

    2013-07-01

    Full Text Available Dental implant has become a fast developing and dynamic field in dental practice. It is acknowledged as a predictable treatment modality with high clinical success rates. Conventional fixed prostheses are no longer considered to be the first choice of treatment for replacing a missing tooth. Despite the increasing number of patients requesting dental implant treatments, there are only some clinicians who are offering implant therapy in their daily practice. The International team for Implantology described a straightforward case as a simple case such as implant placements in adquate soft and hard tissue conditions and single-tooth restorations in a non-aesthetic zone. A review of the current literature discussed the implementation of implant dentistry in universities worldwide into their curriculum for both undergraduate and postgraduate programs in general dentistry. The European consensus in implant dentistry education concluded that it is desirable to include the surgical technique for implant placement for straightforward cases into the dental curriculum. The levels and limitations to which the various aspects of implant dentistry and related skills are taught to be determined by the academic community. This review aimed at promoting awareness amongst dental practitioners and institutions in Indonesia of the shifting treatment paradigm in the maangement of a missing tooth. Hence clinicians will be able to include implant dentistry in the treatment planning of their patients and also undertake a significant part in the execution of such treatments.

  4. Surface treatments of titanium dental implants for rapid osseointegration.

    Science.gov (United States)

    Le Guéhennec, L; Soueidan, A; Layrolle, P; Amouriq, Y

    2007-07-01

    The osseointegration rate of titanium dental implants is related to their composition and surface roughness. Rough-surfaced implants favor both bone anchoring and biomechanical stability. Osteoconductive calcium phosphate coatings promote bone healing and apposition, leading to the rapid biological fixation of implants. The different methods used for increasing surface roughness or applying osteoconductive coatings to titanium dental implants are reviewed. Surface treatments, such as titanium plasma-spraying, grit-blasting, acid-etching, anodization or calcium phosphate coatings, and their corresponding surface morphologies and properties are described. Most of these surfaces are commercially available and have proven clinical efficacy (>95% over 5 years). The precise role of surface chemistry and topography on the early events in dental implant osseointegration remain poorly understood. In addition, comparative clinical studies with different implant surfaces are rarely performed. The future of dental implantology should aim to develop surfaces with controlled and standardized topography or chemistry. This approach will be the only way to understand the interactions between proteins, cells and tissues, and implant surfaces. The local release of bone stimulating or resorptive drugs in the peri-implant region may also respond to difficult clinical situations with poor bone quality and quantity. These therapeutic strategies should ultimately enhance the osseointegration process of dental implants for their immediate loading and long-term success.

  5. Transnasal Endoscopy Removal of Dislodged Dental Implant: A Case Report.

    Science.gov (United States)

    Lim, Daniel; Parumo, Rosliza; Chai, Ma Bee; Shanmuganathan, Jothi

    2017-06-01

    Displacement of dental implants into the maxillary sinus is a rare complication. This article presents a case of displaced dental implant into maxillary sinus. Retrieval of the dental implant from left maxillary sinus was performed via endoscopic sinus surgery. This case highlighted a delayed referral of a 53-year-old male by a general dental practitioner for management of a dislodged dental implant into the left maxillary antrum. The implant was dislodged during placement of a healing abutment 4 months after implant insertion to replace missing 25. Cone beam computerized tomography revealed the displaced implant was located at the ostium of the left nose. A sudden change in sinonasal pressure when the patient took a deep breath during the procedure may have created a negative pressure and suction effect causing the implant to be dislodged and embedded at the ostium. In view of its position, a referral to an otorhinolaryngologist was made for endoscopic removal of the displaced implant. This case also highlighted the need for inter disciplinary cooperation in the management of such a complication for the best interest of the patients.

  6. From brain to bridge: masticatory function and dental implants.

    Science.gov (United States)

    Trulsson, M; van der Bilt, A; Carlsson, G E; Gotfredsen, K; Larsson, P; Müller, F; Sessle, B J; Svensson, P

    2012-11-01

    Masticatory function is an important aspect of oral health, and oral rehabilitation should aim to maintain or restore adequate function. The present qualitative review is the joint effort of a group of clinicians and researchers with experiences ranging from basic and clinical oral neuroscience to management of patients with dental implants. The aim is to provide a short summary for the clinician of the many aspects related to masticatory function (including quality of life) and rehabilitation with dental implants. While there are many reviews on the tissue responses to dental implants and technical aspects, the functional aspects have received relatively little focus. © 2012 Blackwell Publishing Ltd.

  7. Mecanobiología de la interfase hueso-implante dental Mechanobiology of bone-dental implant interphase

    Directory of Open Access Journals (Sweden)

    Juan Carlos Vanegas Acosta

    2010-03-01

    Full Text Available La osteointegración es la conexión estructural y funcional entre el hueso y un implante. Cuando un implante se inserta en el hueso, se crea la denominada interfase hueso-implante, una zona de unión entre la superficie del biomaterial del implante y el hueso circundante. La cicatrización de esta interfase depende de las condiciones biológicas del hueso, las características de diseño del implante y la distribución de cargas entre hueso e implante. En este artículo se hace una revisión del proceso de cicatrización de la interfase hueso-implante para el caso de un implante dental. El objetivo es describir la secuencia de eventos biológicos iniciados con la lesión causada por la inserción del implante y que concluyen con la formación de nuevo hueso en la interfase. Esta descripción incluye una novedosa clasificación de los fenómenos mecánicos que intervienen durante el proceso de cicatrización de los tejidos lesionados. Esta descripción mecanobiológica de la interfase hueso-implante dental se utiliza para determinar las características más relevantes a tener en cuenta en la formulación de un modelo matemático de la osteointegración de implantes dentales.The osteointegration is the structural and functional connection between bone and implant. When an implant is inserted in bone, it creates the so-called bone-implant interphase, a joint zone between implant biomaterial surface and the surrounding bone. The healing of this interphase depends on bone biological conditions, characteristic of implant design and the distribution of loads between bone and implant. The aim of present article is to review of healing process of bone-implant interphase for a dental implant and also to describe the sequence of biological events beginning with lesion caused by implant insertion and leading to the formation of a new bone in the interphase. This description includes a novel classification of mechanical phenomena present in the healing

  8. Primary oral squamous cell carcinoma arising around dental osseointegrated implants mimicking peri-implantitis.

    Science.gov (United States)

    Eguia del Valle, Asier; Martínez-Conde Llamosas, Rafael; López Vicente, José; Uribarri Etxebarria, Agurne; Aguirre Urizar, José Manuel

    2008-08-01

    Prosthodontic rehabilitation using dental implants has become a common practice in dentistry at the present time. The number of complications related to dental osseointegrated implants has increased according to the generalization of its use along the last decade. Among the most common of these complications are chronic inflammatory conditions affecting both hard and soft tissues around dental implants. Although severe complications are uncommon, in recent years several cases of oral squamous cell carcinoma adjacent to dental implants have been published. In this paper we present a new unusual case of primary oral squamous cell carcinoma arising around a dental fixed prosthesis over osseointegrated implants in a 76 male patient with no previous history of malignance and no risk factors related to oral cancer.

  9. The Emergency Dental Appointment: Restorative Emergencies Part 2 - Dental Implant Related Problems.

    Science.gov (United States)

    Kalsi, Harpoonam; Rodriguez, Jose M; Darbar, Ulpee; Bavisha, Kalpesh

    2017-05-01

    This is the second paper in a two-part series discussing the management of common restorative dental emergencies. The first paper focussed upon problems relating to conventional fixed and removable restorations, and this paper discusses the management of common dental implant related emergencies. With dental implant treatment becoming an increasingly popular method of replacing missing teeth, it is very likely that dentists working in general practice will routinely come across patients who have previously undergone this form of treatment, even if they themselves are not directly involved in placing or restoring dental implants. This paper is aimed at general dental practitioners (GDPs) who have some experience in managing dental implants, and those who want to gain further insight into how such situations may be managed.

  10. The relationship between panoramic indices and dental implant failure

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Hyun Jung; Yi, Won Jin; Heo, Min Suk; Lee, Jin Koo; Lee, Sam Sun; Choi, Soon Chul [Seoul National University College of Medicine, Seoul (Korea, Republic of); An, Chang Hyeon [Kyungpook National University College of Medicine, Taegu (Korea, Republic of)

    2004-03-15

    Several panoramic indices have been suggested to assess bone quality from the morphology and width of mandibular cortex on panoramic radiography. The purpose of this study was to compare dental implant failure group with control group in panoramic mandibular index (PMI), mandibular cortical index (MCI), and gonion index (GI) and to determine the effect of these panoramic indices on dental implant failure. A case-control study was designed. Test group (n = 42) consisted of the patients who had their implants extracted because of peri-implantitis. Control group (n = 139) consisted of the patients who retained their implants over one year without any pathologic changes and had been followed up periodically. They had dental implants installed in their mandibles without bone augmentation surgery from 1991 to 2001. The following measures were collected for each patients: 1) PMI, MCI, and GI were measured twice at one-week interval on preoperative panoramic views; and 2) age, sex, implant length, implant type, installed location, occluding dentition state, and complication were investigated from the chart record. The PMI showed moderate level of repeatability. The intra-observer agreement of MCI and GI were good. There was statistically significant difference in PMI between two groups. There were significant different patterns of distribution of MCI and GI between two groups. Among the panoramic indices, PMI and MCI showed significant correlation with dental implant failure. Panoramic indices can be used as reference data in estimating bone quality of edentulous patients who are to have implants installed in their mandibles.

  11. Is Dental Implantation Indicated in Patients with Oral Mucosal Diseases

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    Kalogirou Eleni-Marina

    2017-07-01

    Full Text Available Background/Aim: Dental implants are a reliable treatment choice for rehabilitation of healthy patients as well as subjects with several systemic conditions. Patients with oral mucosal diseases often exhibit oral mucosal fragility and dryness, erosions, blisters, ulcers or microstomia that complicate the use of removable dentures and emphasize the need for dental implants. The aim of the current study is to review the pertinent literature regarding the dental implantation prospects for patients with oral mucosal diseases. Material and Method: The English literature was searched through PubMed and Google Scholar electronic databases with key words: dental implants, oral mucosal diseases, oral lichen planus (OLP, epidermolysis bullosa (EB, Sjögren’s syndrome (SS, cicatricial pemphigoid, bullous pemphigoid, pemphigus vulgaris, scleroderma/systemic sclerosis, lupus erythematosus, leukoplakia, oral potentially malignant disorders, oral premalignant lesions, oral cancer and oral squamous cell carcinoma (SCC. Results: Literature review revealed dental implantation in patients with OLP (14 articles, EB (11 articles, pemphigus vulgaris (1 article, SS (14 articles, systemic sclerosis (11 articles, systemic lupus erythematosus (3 articles and oral SCC development associated with leukoplakia (5 articles. No articles regarding dental implants in patients with pemphigoid or leukoplakia without SCC development were identified. Most articles were case-reports, while only a few retrospective, prospective or observational studies were identified. Conclusions: Dental implants represent an acceptable treatment option with a high success rate in patients with chronic mucocutaneous and autoimmune diseases with oral manifestations, such as OLP, SS, EB and systemic sclerosis. Patients with oral possibly malignant disorders should be closely monitored to rule out the development of periimplant malignancy. Further studies with long follow-up, clinical and radiographic

  12. [Osseointegration of dental implants after radiotherapy for oral cancer].

    Science.gov (United States)

    Nagy, Judit; Seres, László; Novák, Péter; Nagy, Katalin

    2009-02-01

    The goal of rehabilitation following radical surgery and radiotherapy for oral cancer is the restoration of oral functions and aesthetics. Osseointegrated implants improve prosthesis stability. Previous radiotherapy was originally considered a contraindication for implant placement. The aim of this study was to evaluate the survival of dental implants following radiotherapy. Nine oral cancer patients who had undergone radical surgery and radiotherapy were selected. A total of 23 implants were inserted. Twenty-one implants (91.3%) have been functioning without discomfort or infection. This study shows that osseointegrated implants should be considered part of the treatment plan for the rehabilitation of oral cancer patients after radiotherapy.

  13. Automated dental implantation using image-guided robotics: registration results.

    Science.gov (United States)

    Sun, Xiaoyan; McKenzie, Frederic D; Bawab, Sebastian; Li, Jiang; Yoon, Yongki; Huang, Jen-K

    2011-09-01

    One of the most important factors affecting the outcome of dental implantation is the accurate insertion of the implant into the patient's jaw bone, which requires a high degree of anatomical accuracy. With the accuracy and stability of robots, image-guided robotics is expected to provide more reliable and successful outcomes for dental implantation. Here, we proposed the use of a robot for drilling the implant site in preparation for the insertion of the implant. An image-guided robotic system for automated dental implantation is described in this paper. Patient-specific 3D models are reconstructed from preoperative Cone-beam CT images, and implantation planning is performed with these virtual models. A two-step registration procedure is applied to transform the preoperative plan of the implant insertion into intra-operative operations of the robot with the help of a Coordinate Measurement Machine (CMM). Experiments are carried out with a phantom that is generated from the patient-specific 3D model. Fiducial Registration Error (FRE) and Target Registration Error (TRE) values are calculated to evaluate the accuracy of the registration procedure. FRE values are less than 0.30 mm. Final TRE values after the two-step registration are 1.42 ± 0.70 mm (N = 5). The registration results of an automated dental implantation system using image-guided robotics are reported in this paper. Phantom experiments show that the practice of robot in the dental implantation is feasible and the system accuracy is comparable to other similar systems for dental implantation.

  14. Research on dental implant and its industrialization stage

    Science.gov (United States)

    Dongjoon, Yang; Sukyoung, Kim

    2017-02-01

    Bone cell attachment to Ti implant surfaces is the most concerned issue in the clinical implant dentistry. Many attempts to achieve the fast and strong integration between bone and implant have been tried in many ways, such as selection of materials (for example, Ti, ZrO2), shape design of implant (for example, soft tissue level, bone level, taped or conical, etc), and surface modification of implants (for example, roughed. coated, hybrid), etc. Among them, a major consideration is the surface design of dental implants. The surface with proper structural characteristics promotes or induces the desirable responses of cells and tissues. To obtain such surface which has desirable cell and tissue response, a variety of surface modification techniques has been developed and employed for many years. In this review, the method and trend of surface modification will be introduced and explained in terms of the surface topography and chemistry of dental implants.

  15. Implantes dentales en pacientes adultos postrauma dentoalveolar. Estudio descriptivo

    Directory of Open Access Journals (Sweden)

    Edgardo González

    2016-04-01

    Conclusiones: En este estudio se presenta un protocolo establecido y se establece la necesidad de un diagnóstico detallado para planificar la rehabilitación mediante implantes dentales posterior a un trauma con un equipo multidisciplinario.

  16. The feasibility of immediately loading dental implants in edentulous jaws.

    Science.gov (United States)

    Henningsen, Anders; Smeets, Ralf; Wahidi, Aria; Kluwe, Lan; Kornmann, Frank; Heiland, Max; Gerlach, Till

    2016-08-01

    Immediate loading of dental implants has been proved to be feasible in partially edentulous jaws. The purpose of this retrospective investigation was to assess the feasibility of immediately loading dental implants in fully edentulous jaws. A total of 24 patients aged between 53 and 89 years received a total of 154 implants in their edentulous maxillae or mandibles. Among the implants, 45 were set in fresh extracted sockets and 109 in consolidated alveolar bones. The implants were provisionally managed with chair-side made provisional resin bridges and exposed to immediate loading. Implants were followed up for 1-8 years, including radiographic imaging. Marginal bone levels were evaluated based on radiographic imaging. A total of 148 out of the 154 implants survived over the follow-up period of 1 to 8 years, giving a survival rate of 96%. The time or region of the implantation, the pre-implant augmentation, and the length and diameter of the implants had no statistically significant influence on the survival or the success rate. The marginal bone level remained stable with only minimal loss of 0.3 mm after 60 months of loading. Within the limitations of this study, immediate loading is feasible for dental implants in edentulous jaws.

  17. The feasibility of immediately loading dental implants in edentulous jaws

    Science.gov (United States)

    2016-01-01

    Purpose Immediate loading of dental implants has been proved to be feasible in partially edentulous jaws. The purpose of this retrospective investigation was to assess the feasibility of immediately loading dental implants in fully edentulous jaws. Methods A total of 24 patients aged between 53 and 89 years received a total of 154 implants in their edentulous maxillae or mandibles. Among the implants, 45 were set in fresh extracted sockets and 109 in consolidated alveolar bones. The implants were provisionally managed with chair-side made provisional resin bridges and exposed to immediate loading. Implants were followed up for 1–8 years, including radiographic imaging. Marginal bone levels were evaluated based on radiographic imaging. Results A total of 148 out of the 154 implants survived over the follow-up period of 1 to 8 years, giving a survival rate of 96%. The time or region of the implantation, the pre-implant augmentation, and the length and diameter of the implants had no statistically significant influence on the survival or the success rate. The marginal bone level remained stable with only minimal loss of 0.3 mm after 60 months of loading. Conclusions Within the limitations of this study, immediate loading is feasible for dental implants in edentulous jaws. PMID:27588213

  18. The Role of Occlusion in the Dental Implant and Peri-implant Condition: A Review.

    Science.gov (United States)

    Graves, Carmen V; Harrel, Steve K; Rossmann, Jeffrey A; Kerns, David; Gonzalez, Jorge A; Kontogiorgos, Elias D; Al-Hashimi, Ibtisam; Abraham, Celeste

    2016-01-01

    Dental implants have become a widely used dental treatment approach. It is important to identify factors that can be detrimental to dental implants and the peri-implant complex. There is controversy regarding whether occlusion plays a role in the implant and peri-implant condition. The present study aims to review the scientific literature regarding this topic. Animal and human studies, and previous reviews on the topic are included and presented. There is a wide heterogeneity among study designs. Several articles demonstrated that occlusion and occlusion overload could detrimentally affect the peri-implant condition, while other articles did not support these results. More studies are needed to help understand the mechanisms by which occlusion might play a role in the peri-implant condition.

  19. Novel surface coating materials for endodontic dental implant

    Energy Technology Data Exchange (ETDEWEB)

    Fathi, M.H. [Isfahan Univ. of Technology, Materials Engineering Dept., Isfahan (Iran, Islamic Republic of); Mortazavi, V.; Moosavi, S.B. [Isfahan Univ. of Medical Sciences, Faculty of Dentistry, Isfahan (Iran, Islamic Republic of)

    2003-07-01

    The aim of this study was to design and produce novel coating materials in order to obtain two goals including; improvement of the corrosion behavior of metallic dental endodontic implant and the bone osteointegration simultaneously. Stainless steel 316L (SS) was used as a metallic substrate and a novel Hydroxyapatite/Titanium (HA/Ti) composite coating was prepared on it. Structural characterization techniques including XRD, SEM and EDX were utilized to investigate the microstructure and morphology of the coating. Electrochemical tests were performed in physiological solutions in order to determine and compare the corrosion behavior of the coated and uncoated specimens as an indication of biocompatibility. Two types of endodontic implants including; SS with and without (HA/Ti) composite coating were prepared and subsequently implanted in the mandibular canine of 20 cats after completion of root canal treatment and osseous preparation. After a healing period of 4 months, osteointegration evaluation and histopathological interpretation was carried out using SEM and optical microscopy. Results indicate that the novel HA/Ti composite coating improves the corrosion behavior and biocompatibility of SS endodontic dental implant. The clinical evaluation (in vivo test) results showed that there was significant difference in osteointegration between coated and uncoated endodontic dental implants and average bone osteointegration of coated implants were more than uncoated implants. The histopathological results and bone tissue response to the coated implants was acceptable and it was concluded that HA/Ti composite coated SS could be used as well as an endodontic dental implant. (author)

  20. CLINICAL CONSIDERATIONS OF DENTAL IMPLANT SYSTEM IN IMMEDIATE LOADING IMPLANT CASES

    Directory of Open Access Journals (Sweden)

    Carolina Damayanti Marpaung

    2015-06-01

    Full Text Available Immediate loading of dental implant has been researched intensively in the development of Branemark’s early concept of 2 stages implant placement. This was embarked from both patients and practiitioner’s convenience towards a simpler protocol and shorter time frame. Many recent researchers later found that micromotions derived from occlusal loading for a certain degree, instead of resulting a fibrous tissue encapsulation, can enhance the osseointegration process. Dental Implant system enhancement towards maximizing the primary stability held a key factor in Branemark’s concept development. Surgical protocol and implant design was found to give a significant contribution to the prognosis of immediate-loading implants.

  1. COMPARATIVE CHARACTERISTICS OF MATERIALS USED IN DENTAL IMPLANTATION

    Directory of Open Access Journals (Sweden)

    A. A. Yegorov

    2014-01-01

    Full Text Available The objective of the research is a review of some characteristics of dental implants’ products and an analysis of prospects of using them in modern medicine.Dental implantation as a high-technology method of restoring the natural anatomical structure has no competitors at present. The advantages of dental implants consist in their high operational dependability, a longer life time, a higher functionality and a lesser rate of complications as compared to the use of complete or bridge prostheses.The materials used in dental implantation for this purpose are rather diverse. Doctors using them rely on extensive clinical experience, a developed industry of accessory materials, instruments, that is everything that ensures comfortable work and conveniences for the patient.At the same time, the data mentioned in the article testify to the effect that ceramic implants as compared to titanium alloy implants have comparable or better indices. This is guaranteed, for example, by the requirements of the new international standard ISO6474-2:2012: first-rate strength and wear resistance; thermal stability and corrosion resistance; ceramics’ four point bending strength over 750 MPa.The result of the conducted analysis is a review of using various materials in dental implantation. The author compares the aesthetic indices and durability of titanium or metal alloy implants to those of ceramic ones. The comparison shows that, under the current level of ceramic materials’ structural property, it is actual for dentistry to develop its own methodological approaches in relation to a wide use of ceramic implants and creation of various ceramic mono-implants with the purpose of improving the results of treatment of patients, suffering from secondary partial or complete adentia accompanied by bone tissue deficiency, by applying the methods of dental implantation.

  2. Implant Education Programs in North American Dental Schools.

    Science.gov (United States)

    Arbree, Nancy S.; Chapman, Robert J.

    1991-01-01

    A survey of 52 dental schools found that dental implant techniques were taught in 34 pre- and 34 postdoctoral curricula, involving mostly prosthodontics and oral surgery departments, with periodontology departments lagging behind. Most predoctoral programs did not have research involvement. Cooperation among specialties is recommended over implant…

  3. CO2 laser surface treatment of failed dental implants for re-implantation: an animal study.

    Science.gov (United States)

    Kasraei, Shahin; Torkzaban, Parviz; Shams, Bahar; Hosseinipanah, Seyed Mohammad; Farhadian, Maryam

    2016-07-01

    The aim of the present study was to evaluate the success rate of failed implants re-implanted after surface treatment with CO2 laser. Despite the widespread use of dental implants, there are many incidents of failures. It is believed that lasers can be applied to decontaminate the implant surface without damaging the implant. Ten dental implants that had failed for various reasons other than fracture or surface abrasion were subjected to CO2 laser surface treatment and randomly placed in the maxillae of dogs. Three failed implants were also placed as the negative controls after irrigation with saline solution without laser surface treatment. The stability of the implants was evaluated by the use of the Periotest values (PTVs) on the first day after surgery and at 1, 3, and 6 months post-operatively. The mean PTVs of treated implants increased at the first month interval, indicating a decrease in implant stability due to inflammation followed by healing of the tissue. At 3 and 6 months, the mean PTVs decreased compared to the 1-month interval (P implant stability. The mean PTVs increased in the negative control group compared to baseline (P implants were significantly lower than control group at 3 and 6 months after implant placement (P implantation of failed implants in Jack Russell Terrier dogs after CO2 laser surface debridement is associated with a high success rate in terms of implant stability.

  4. Niobium based coatings for dental implants

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, G., E-mail: enggiova@hotmail.com [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Circuito Exterior s/n, CU, Mexico D.F. 04510 (Mexico); Facultad de Quimica, Departamento de Ingenieria Quimica, Universidad Nacional Autonoma de Mexico, Mexico D.F. 04510 (Mexico); Rodil, S.E. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Circuito Exterior s/n, CU, Mexico D.F. 04510 (Mexico); Arzate, H. [Laboratorio de Biologia Celular y Molecular, Facultad de Odontologia, Universidad Nacional Autonoma de Mexico, CU, Mexico D.F. 04510 (Mexico); Muhl, S. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Circuito Exterior s/n, CU, Mexico D.F. 04510 (Mexico); Olaya, J.J. [Unidad de Materiales, Departamento de Ingenieria Mecanica y Mecatronica, Universidad Nacional de Colombia, Cra. 30 45-03 Bogota (Colombia)

    2011-01-15

    Niobium based thin films were deposited on stainless steel (SS) substrates to evaluate them as possible biocompatible surfaces that might improve the biocompatibility and extend the life time of stainless steel dental implants. Niobium nitride and niobium oxide thin films were deposited by reactive unbalanced magnetron sputtering under standard deposition conditions without substrate bias or heating. The biocompatibility of the surfaces was evaluated by testing the cellular adhesion and viability/proliferation of human cementoblasts during different culture times, up to 7 days. The response of the films was compared to the bare substrate and pieces of Ti6Al4V; the most commonly used implant material for orthopedics and osteo-synthesis applications. The physicochemical properties of the films were evaluated by different means; X-ray diffraction, Rutherford backscattering spectroscopy and contact angle measurements. The results suggested that the niobium oxide films were amorphous and of stoichiometric Nb{sub 2}O{sub 5} (a-Nb{sub 2}O{sub 5}), while the niobium nitride films were crystalline in the FCC phase (c-NbN) and were also stoichiometric with an Nb to N ratio of one. The biological evaluation showed that the biocompatibility of the SS could be improved by any of the two films, but neither was better than the Ti6Al4V alloy. On the other hand, comparing the two films, the c-NbN seemed to be a better surface than the oxide in terms of the adhesion and proliferation of human cemetoblasts.

  5. Assessment of the Survival of Dental Implants in Irradiated Jaws ...

    African Journals Online (AJOL)

    Artificial prosthesis has certain side‑effects such as having the capability of producing xerostomia, mucositis, and altering the healing process in irradiated tissues. Dental implants avoid these side‑effects to a much extent but successfully placing implants in patients treated for oral cancer is itself a difficult task because some.

  6. Assessment of the survival of dental implants in irradiated jaws ...

    African Journals Online (AJOL)

    Background: In patients undergoing head and neck surgery for various pathologic conditions, implants are one of the best restorative options and are increasing widely used. Therefore, we evaluated the success of dental implants in the irradiated jaws of patients following treatment of oral cancer oral cancer treated patients ...

  7. Assessment of the Survival of Dental Implants in Irradiated Jaws ...

    African Journals Online (AJOL)

    Materials and Methods: Data of oral cancer treated patients was collected retrospectively from 2002 to. 2008. We took 46 oral cancer treated patients in ..... Reintsema H. Benefits of dental implants installed during ablative tumour surgery in oral cancer patients: A prospective 5-year clinical trial. Clin Oral Implants Res 2010 ...

  8. Dental Implant Patients and Their Satisfaction with Treatment.

    Science.gov (United States)

    Tawares, Mary; And Others

    1990-01-01

    The study developed a profile of dental implant patients from 38 private practices to document characteristics of endosseous implant recipients of the past 10 years. Data were then analyzed using multivariate techniques to examine the relationship between these characteristics and patient-reported outcomes. Patients tended to have high incomes and…

  9. Imunohistological aspects of the tissue around dental implants

    Science.gov (United States)

    Nimigean, Victor; Nimigean, Vanda R.; Sǎlǎvǎstru, Dan I.; Moraru, Simona; BuÅ£incu, Lavinia; Ivaşcu, Roxana V.; Poll, Alexandru

    2016-03-01

    Objectives: study of soft and hard tissues around implants. Material and methods: For the immunohistochemical and histological study of the implant/soft tissue interface, we examined pieces of peri-implant mucosa harvested from 35 patients. The implant/bone interface was assessed using histologic and histomorphometric examination of hard tissues around unloaded, early loaded or delayed loaded dental implants with pre-established design, with a sandblasted and acid-etched surface, placed both in extraction sockets, or after bone healing following tooth removal. This study was performed on 9 common race dogs. Results: The histological study of the implant/soft tissue interface showed regenerative modifications and moderate chronic subepithelial inflammatory reactions. Immunohistochemical evaluation of the soft tissue biopsies revealed the presence of specific immunocompetent cells and proteins of the matrix metalloproteinase (MMP) expression. Bone-implants contacts were more obvious in the apical half of the implants and at the edges of the threads, than between them. A mature, lamelliform bone containing lacunae with osteocytes and lack of connective tissue were noticed around implants that were late placed and loaded. The new-formed bone was also abundant in the crestal zone, not only in the apical part of the implants. Conclusions: A thorough understanding of the microstructure of dental implant/soft and hard tissue interface will improve the longevity of osseointegrated implants.

  10. Differences in knowledge related to dental implants between patients with and without a treatment history of dental implants.

    Science.gov (United States)

    Ken, Yukawa; Tachikawa, Noriko; Kasugai, Shohei

    2017-09-01

    This aim of this study was to investigate the differences between patients with and without a treatment history of dental implants by use of a questionnaire survey in order to determine the information that is required for patients undergoing dental implants. The questionnaires were given to 4512 patients who visited the Tokyo Medical and Dental University Hospital for oral implants between January 2012 and December 2014, and 2972 (66%) valid questionnaires were collected. There were 857 patients with a treatment history of dental implants and 2115 patients without. "Preservation of an adjacent tooth" was the reason that 32% of these patients chose implant therapy, and the patients without treatment history were significantly higher than the patients with one. Significantly, more patients without a treatment history of dental implants selected the after-effects of surgery and pain after surgery as their main concerns for implant therapy compared to those with a treatment history. In the question "Pain after surgery," the patients without treatment history did not know significantly lower than the patients with one. Patients without a treatment history of dental implants placed more importance on the preservation of healthy teeth. Because patients, in particular those without a treatment history of dental implants, are anxious about surgery, we should provide them with more information on treatment than we already do and explain the risks of treatment to them. To keep the credence between doctors and patients, informed consent and patient education on treatment are six important concerns. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  11. Can degradation products released from dental implants affect peri-implant tissues?

    Science.gov (United States)

    Noronha Oliveira, M; Schunemann, W V H; Mathew, M T; Henriques, B; Magini, R S; Teughels, W; Souza, J C M

    2017-08-02

    This study aimed to assess the literature available on the effects, on peri-implant tissues, of degradation products released from dental implants as a consequence of therapeutic treatment for peri-implantitis and/or of wear-corrosion of titanium. A literature review of the PubMed medline database was performed up to December 31, 2016. The following search terms were used: "titanium wear and dental implant"; "titanium corrosion and dental implant"; "bio-tribocorrosion"; "peri-implantitis"; "treatment of peri-implantitis"; "titanium particles release and dental implant"; and "titanium ion release and dental implant". The keywords were applied to the database in different combinations without limits of time period or type of work. In addition, the reference lists of relevant articles were searched for further studies. Seventy-nine relevant scientific articles on the topic were retrieved. The results showed that pro-inflammatory cytokines, infiltration of inflammatory response cells and activation of the osteoclasts activity are stimulated in peri-implant tissues in the presence of metal particles and ions. Moreover, degenerative changes were reported in macrophages and neutrophils that phagocytosed titanium microparticles, and mutations occurred in human cells cultured in medium containing titanium-based nanoparticles. Debris released from the degradation of dental implants has cytotoxic and genotoxic potential for peri-implant tissues. Thus, the amount and physicochemical properties of the degradation products determine the magnitude of the detrimental effect on peri-implant tissues. © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  12. Systematic review on success of narrow-diameter dental implants.

    Science.gov (United States)

    Klein, Marc O; Schiegnitz, Eik; Al-Nawas, Bilal

    2014-01-01

    The aim of this systematic review was to determine the survival and success rates of narrow-diameter implants (NDI) in different clinical indications compared to standard diameter implants. Implant diameters were categorized into categories 1 (implant diameters implant diameters 3 to 3.25 mm (Category 2), and 16 articles reporting on implant diameters 3.3 to 3.5 mm (Category 3). The quality of the studies was mostly low with a high risk of bias. Dental implants implants) were one-piece in the edentulous arch and non-loaded frontal region with survival rates between 90.9% and 100%. For dental implants with a diameter between 3.0 and 3.25 mm, most were two-piece implants inserted into narrow tooth gaps without loading and in the frontal region. Survival rates for these implants ranged between 93.8% and 100%. Implants of 3.3 to 3.5 mm were two-piece and were also used in the load-bearing posterior region. Survival rates were between 88.9% and 100%, and success rates ranged between 91.4% and 97.6%. A meta-analysis was conducted for NDI (3.3 to 3.5 mm), which showed no statistically significant difference in implant survival compared to conventional implants with an odds ratio of 1.16 (0.7 to 1.69). Narrow-diameter implants of 3.3 to 3.5 mm are well documented in all indications including load-bearing posterior regions. Smaller implants of 3.0 to 3.25 mm in diameter are well documented only for single-tooth non-load-bearing regions. Mini-implants 1 year and information on patient specific risk factors (bruxism, restoration type) are also missing.

  13. A new, simple implant-level impression technique for dental implants in limited interproximal space.

    Science.gov (United States)

    Saboury, Aboulfazl; Hadi, Alireza

    2012-06-01

    Making an implant-level impression when implants are placed in limited interproximal space or compromising angulations can be a time-consuming procedure. This article presents a new method for developing a master cast for two implants clinically placed convergent and very close to each other. The technique consists of making an implant-level impression using a transfer jig fabricated on dental abutments. © 2012 by the American College of Prosthodontists.

  14. Recubrimientos antibacterianos basados en silicio para implantes dentales

    OpenAIRE

    Pallá Rubio, Beatriz

    2016-01-01

    232 p. El uso de implantes dentales en odontología está tan extendido hoy en día, que ya nadie discute su relevancia. Su tasa de éxitos es elevada (debido al criterio de selección de pacientes), si bien un porcentaje cercano al 10% de los implantes debe ser eliminado, por problemas de osteointegración, o por la aparición de infecciones, considerándose esto último hoy en día, la principal causa del fallo de los implantes dentales. Sin embargo, una gran parte de la investigación destinada a ...

  15. [Current dental implant design and its clinical importance].

    Science.gov (United States)

    Ye, Lin

    2017-02-01

    The development of clinical implant dentistry was intensively affected by dental implant design improvement and innovation, which brought about new concept, even milestone-like changes of clinical protocol. The current improvements of dental implant design and their clinical importance could be highlighted as followings: 1) The implant apical design influences the implant preliminary stability in immediate implant. The apical 3-5 mm design of implant makes implant stable in immediate implant, because this part would be screwed into alveolar bone through fresh socket, the other part of implant could not be tightly screwed in the socket because of smaller implant diameter. Implant apical form, screw design, self-taping of apical part would be essential for immediate implant. 2) The enough preliminary stability of implant makes immediate prosthesis possible. When osseointegration does not occur, the implant stability comes from a mechanical anchorage, which depends on implant form, screw thread and self-taping design. 3) Implant neck design may have influence for soft tissue recession in esthetic zone. The implant with large shoulder would not be selected for the esthetic area. The platform design may be more favorable in the area. 4) The connection design between implant and abutment is thought a very important structure in implant long-term stability. Moose taper and "tube in tube" were well documented structure design in 20-year clinical practice in Peking University. 5) In last 15 years, the plenty studies showed the platform design of implant had positive influence in implant marginal bone level. Whatever in single implant restoration or multi-implant prosthesis. 6) The digital technology makes clinical work more precise and high-tech. This would be a trend in implant dentistry. New generation of chair-side digital computer-aided design/computer-aided manufacturing makes immediate prosthesis without conventional impression possible. 7) New abutment design have

  16. Cooling profile following prosthetic preparation of 1-piece dental implants.

    Science.gov (United States)

    Cohen, Omer; Gabay, Eran; Machtei, Eli E

    2010-01-01

    The aim of this study was to evaluate the effect of water irrigation on heat dissipation kinetics following abutment preparation of 1-piece dental implants. UNO 1-piece dental implants were mounted on Plexiglas apparatus clamping the implant at the collar. T-type thermocouple was attached to the first thread of the implant and recorded thermal changes at 100 millisecond intervals. Implants were prepared using highspeed dental turbine at 400,000 RPM with a coarse diamond bur. Once temperature reached 47 degrees C, abutment preparation was discontinued. Thirty implants were divided into 2 groups. Group A: Passive cooling without water irrigation. Group B: Cooling with turbine's water spray adjacent to the implant (30 mL/min). The following parameters were measured: T47 (time from peak temperature to 47 degrees C), T50%, T75% (time until the temperature amplitude decayed by 50% and 75%, respectively), dTemp50%/dt decay, and dTemp75%/dt decay (cooling rate measured at 50% and 75% of amplitude decay, respectively). Water spray irrigation significantly reduced T47 (1.37+/-0.29 seconds vs 19.97+/-3.06 seconds, Pspray irrigation also increased cooling capacity ninefold: dTemp50%/dt decay (4.14+/-0.61 degrees C/s vs 0.48+/-0.06 degrees C/s, Pspray adjacent to the abutment following the cessation of implant preparation might prove beneficial for rapid cooling of the implant.

  17. Impact of Dental Implant Surface Modifications on Osseointegration

    Directory of Open Access Journals (Sweden)

    Ralf Smeets

    2016-01-01

    Full Text Available Objective. The aim of this paper is to review different surface modifications of dental implants and their effect on osseointegration. Common marketed as well as experimental surface modifications are discussed. Discussion. The major challenge for contemporary dental implantologists is to provide oral rehabilitation to patients with healthy bone conditions asking for rapid loading protocols or to patients with quantitatively or qualitatively compromised bone. These charging conditions require advances in implant surface design. The elucidation of bone healing physiology has driven investigators to engineer implant surfaces that closely mimic natural bone characteristics. This paper provides a comprehensive overview of surface modifications that beneficially alter the topography, hydrophilicity, and outer coating of dental implants in order to enhance osseointegration in healthy as well as in compromised bone. In the first part, this paper discusses dental implants that have been successfully used for a number of years focusing on sandblasting, acid-etching, and hydrophilic surface textures. Hereafter, new techniques like Discrete Crystalline Deposition, laser ablation, and surface coatings with proteins, drugs, or growth factors are presented. Conclusion. Major advancements have been made in developing novel surfaces of dental implants. These innovations set the stage for rehabilitating patients with high success and predictable survival rates even in challenging conditions.

  18. Impact of Different Surgeons on Dental Implant Failure.

    Science.gov (United States)

    Chrcanovic, Bruno Ramos; Kisch, Jenö; Albrektsson, Tomas; Wennerberg, Ann

    To assess the influence of several factors on the prevalence of dental implant failure, with special consideration of the placement of implants by different dental surgeons. This retrospective study is based on 2,670 patients who received 10,096 implants at one specialist clinic. Only the data of patients and implants treated by surgeons who had inserted a minimum of 200 implants at the clinic were included. Kaplan-Meier curves were stratified with respect to the individual surgeon. A generalized estimating equation (GEE) method was used to account for the fact that repeated observations (several implants) were placed in a single patient. The factors bone quantity, bone quality, implant location, implant surface, and implant system were analyzed with descriptive statistics separately for each individual surgeon. A total of 10 surgeons were eligible. The differences between the survival curves of each individual were statistically significant. The multivariate GEE model showed the following variables to be statistically significant: surgeon, bruxism, intake of antidepressants, location, implant length, and implant system. The surgeon with the highest absolute number of failures was also the one who inserted the most implants in sites of poor bone and used turned implants in most cases, whereas the surgeon with the lowest absolute number of failures used mainly modern implants. Separate survival analyses of turned and modern implants stratified for the individual surgeon showed statistically significant differences in cumulative survival. Different levels of failure incidence could be observed between the surgeons, occasionally reaching significant levels. Although a direct causal relationship could not be ascertained, the results of the present study suggest that the surgeons' technique, skills, and/or judgment may negatively influence implant survival rates.

  19. Dental implants for severely atrophied jaws due to ectodermal dysplasia

    Directory of Open Access Journals (Sweden)

    Preetha Balaji

    2015-01-01

    Full Text Available The aim was to present the successful esthetical and functional rehabilitation of partial anodontia in a case of severe ectodermal dysplasia with complete atrophy of the jaws. A 17-year-old male with Class III malocclusion with partial anodontia sought dental implant treatment. His expectation was that of Class I occlusion. The challenge in the case was to match the expectation, reality, and the clinical possibilities. Ridge augmentation was performed with a combination of rib graft and recombinant human bone morphogenetic protein-2. Simultaneously, 6 implants (Nobel Biocare™ - Tapered Groovy were placed in maxillary arch and 10 in the mandible. Simultaneous placement ensured faster and better osseointegration though a mild compromise of the primary stability was observed initially. After adequate healing, Customized Zirconia Procera™ system was used to build the framework. Zirconia crown was cemented to the framework. Radiological and clinical evidence of osseointegration was observed in all 16 dental implants. Successful conversion of Class III to Class I occlusion was achieved with the combination of preprosthetic alveolar ridge augmentation, Procera™ Implant Bridge system. Abnormal angulations and or placement of dental implants would result in failure of the implant. Hence conversion of Class III to Class I occlusion needs complete and complex treatment planning so that the entire masticatory apparatus is sufficiently remodeled. Planning should consider the resultant vectors that would otherwise result in failure of framework or compromise the secondary stability of the dental implant during function. A successful case of rehabilitation of complex partial anodontia is presented.

  20. Short dental implants: an emerging concept in implant treatment.

    Science.gov (United States)

    Al-Hashedi, Ashwaq Ali; Taiyeb Ali, Tara Bai; Yunus, Norsiah

    2014-06-01

    Short implants have been advocated as a treatment option in many clinical situations where the use of conventional implants is limited. This review outlines the effectiveness and clinical outcomes of using short implants as a valid treatment option in the rehabilitation of edentulous atrophic alveolar ridges. Initially, an electronic search was performed on the following databases: Medline, PubMed, Embase, Cochrane Database of Systematic Reviews, and DARE using key words from January 1990 until May 2012. An additional hand search was included for the relevant articles in the following journals: International Journal of Oral and Maxillofacial Implants, Clinical Oral Implants Research, Journal of Clinical Periodontology, International Journal of Periodontics, Journal of Periodontology, and Clinical Implant Dentistry and Related Research. Any relevant papers from the journals' references were hand searched. Articles were included if they provided detailed data on implant length, reported survival rates, mentioned measures for implant failure, were in the English language, involved human subjects, and researched implants inserted in healed atrophic ridges with a follow-up period of at least 1 year after implant-prosthesis loading. Short implants demonstrated a high rate of success in the replacement of missing teeth in especially atrophic alveolar ridges. The advanced technology and improvement of the implant surfaces have encouraged the success of short implants to a comparable level to that of standard implants. However, further randomized controlled clinical trials and prospective studies with longer follow-up periods are needed.

  1. Flapless dental implant surgery: a retrospective study of 1,241 consecutive implants.

    Science.gov (United States)

    Doan, Nghiem Van Trong; Du, Zhibin; Reher, Peter; Xiao, Yin

    2014-01-01

    The purpose of this study was to identify retrospectively the predictors of implant survival when the flapless protocol was used in two private dental practices. The collected data were initially computer searched to identify the patients; later, a hand search of patient records was carried out to identify all flapless implants consecutively inserted over the last 10 years. The demographic information gathered on statistical predictors included age, sex, periodontal and peri-implantitis status, smoking, details of implants inserted, implant locations, placement time after extraction, use of simultaneous guided hard and soft tissue regeneration procedures, loading protocols, type of prosthesis, and treatment outcomes (implant survival and complications). Excluded were any implants that required flaps or simultaneous guided hard and soft tissue regeneration procedures, and implants narrower than 3.25 mm. A total of 1,241 implants had been placed in 472 patients. Life table analysis indicated cumulative 5-year and 10-year implant survival rates of 97.9% and 96.5%, respectively. Most of the failed implants occurred in the posterior maxilla (54%) in type 4 bone (74.0%), and 55.0% of failed implants had been placed in smokers. Flapless dental implant surgery can yield an implant survival rate comparable to that reported in other studies using traditional flap techniques.

  2. Survival of dental implants placed in sites of previously failed implants.

    Science.gov (United States)

    Chrcanovic, Bruno R; Kisch, Jenö; Albrektsson, Tomas; Wennerberg, Ann

    2017-11-01

    To assess the survival of dental implants placed in sites of previously failed implants and to explore the possible factors that might affect the outcome of this reimplantation procedure. Patients that had failed dental implants, which were replaced with the same implant type at the same site, were included. Descriptive statistics were used to describe the patients and implants; survival analysis was also performed. The effect of systemic, environmental, and local factors on the survival of the reoperated implants was evaluated. 175 of 10,096 implants in 98 patients were replaced by another implant at the same location (159, 14, and 2 implants at second, third, and fourth surgeries, respectively). Newly replaced implants were generally of similar diameter but of shorter length compared to the previously placed fixtures. A statistically significant greater percentage of lost implants were placed in sites with low bone quantity. There was a statistically significant difference (P = 0.032) in the survival rates between implants that were inserted for the first time (94%) and implants that replaced the ones lost (73%). There was a statistically higher failure rate of the reoperated implants for patients taking antidepressants and antithrombotic agents. Dental implants replacing failed implants had lower survival rates than the rates reported for the previous attempts of implant placement. It is suggested that a site-specific negative effect may possibly be associated with this phenomenon, as well as the intake of antidepressants and antithrombotic agents. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  3. Peripheral Giant Cell Granuloma Associated With Dental Implants.

    Science.gov (United States)

    Scarano, Antonio; Lorusso, Carmen; Mortellaro, Carmen; Limongelli, Luisa; Tempesta, Angela; Favia, Gianfranco

    2018-01-04

    Peripheral giant cell granuloma (PGCG) is a nonneoplastic lesion of the oral mucosa arising on the buccal or lingual attached gingiva or alveolar mucosa and the crest of the edentulous alveolar ridge and contains numerous giant cells. This case series describes 3 cases regarding the clinical and surgical management of PGCG associated with dental implants. This case series presents 3 patients, mean age 36 years, who showed a pedunculated painless lesion associated with dental implants that radiographically appeared as an osseous rarefaction corresponding the implants. Histological examination provided the diagnosis of PGCG. The treatment approach consisted in a surgical complete resection of the lesion and implant removal. After 1-year-follow-up, all the investigated cases did not show signs of recurrence. A correct diagnosis and an appropriate surgical treatment of peri-implant giant cell granuloma are very important aspects for proper management of the lesion.

  4. Surface Modifications and Their Effects on Titanium Dental Implants

    Science.gov (United States)

    Jemat, A.; Ghazali, M. J.; Razali, M.; Otsuka, Y.

    2015-01-01

    This review covers several basic methodologies of surface treatment and their effects on titanium (Ti) implants. The importance of each treatment and its effects will be discussed in detail in order to compare their effectiveness in promoting osseointegration. Published literature for the last 18 years was selected with the use of keywords like titanium dental implant, surface roughness, coating, and osseointegration. Significant surface roughness played an important role in providing effective surface for bone implant contact, cell proliferation, and removal torque, despite having good mechanical properties. Overall, published studies indicated that an acid etched surface-modified and a coating application on commercial pure titanium implant was most preferable in producing the good surface roughness. Thus, a combination of a good surface roughness and mechanical properties of titanium could lead to successful dental implants. PMID:26436097

  5. [Dental implantation at the maxilla with autologous bone transplantation].

    Science.gov (United States)

    Vajdovich, I; Bandula, M; Tóth, Z

    2001-06-01

    In the Department of Maxillofacial and Oral Surgery of County Hospital of Szentes, different types of bone losses of the maxillary alveolar ridge have been treated since 1 March, 1990. The applied surgical procedures were the following: 1. 394 patients were treated with GBR technique and 567 DenTi implants were inserted for these patients. 2. In 47 cases autogenous bone grafts were harvested from mandibular cortica and 78 DenTi implants were placed. Altogether 14 implants were lost; the success rate was 97.81% in the period between 1 March, 1990 and 31 January, 2001. 3. The severely resorbed maxillary alveolar ridge was replaced by rigid autogenous bone graft harvested from the ilium or from tibia. The bone graft was fixed with implants to the recipient surface. This method was applied in 36 cases from 1 February, 1992 until 31 January, 2001. 147 DenTi implants were inserted and 7 of them were lost. The success rate was 97.28%. Our results have indicated that the dental implants had accelerated the remodelling process of the transplanted autogenous bone and the success rate of the simultaneously performed dental implants were comparable to that of the two stage procedures in which dental implants were inserted several weeks following bone grafting. Based on our long-term favourable clinical experience this technique has been proven to be an excellent method for correcting and replacing the lost maxillary alveolar ridges as well as the circumscribed alveolar bony defects.

  6. Rehabilitation with dental implants of oral cancer patients.

    Science.gov (United States)

    Werkmeister, R; Szulczewski, D; Walteros-Benz, P; Joos, U

    1999-02-01

    The aim of this study was to evaluate the risks and complications of rehabilitation with dental implants after tumour surgery and radiotherapy. After a disease-free survival of 18 months, 29 patients who had undergone oral cancer treatment were rehabilitated with dental implants. The complication rate of implants in irradiated, non-irradiated and grafted bone was analyzed at least 3 years after implant placement. In the healing period, 28.6% of the implants in irradiated bone and 8.4% in non-irradiated bone showed soft tissue complications. Of the implants, 26.7% in the irradiated and 14.7% in the non-irradiated mandibular bone were lost in the first 36 months after placement. Thirty-one point two percent of implants inserted in non-irradiated bone grafts were affected and did not osseointegrate. Of 109 inserted implants, 70 were suitable for prosthetic rehabilitation. There are high complication rates after implant placement in oral cancer patients. Irradiation adversely affects soft tissue healing. Osseointegration is frequently disturbed, especially when implants were placed in non-vascularized bone grafts.

  7. Biomechanical evaluation of subcrestal dental implants with different bone anchorages

    Directory of Open Access Journals (Sweden)

    Bruno Salles SOTTO-MAIOR

    2014-08-01

    Full Text Available This study evaluated the biomechanical influence of apical bone anchorage on a single subcrestal dental implant using three-dimensional finite element analysis (FEA. Four different bone anchorage designs were simulated on a posterior maxillary segment using one implant with platform switching and internal Morse taper connection as follows: 2 mm subcrestal placement with (SW or without (SO the implant apex engaged into the cortical bone or position at bone level with anchorage only in the crestal cortical (BO bone or with bicortical fixation (BW. Each implant received a premolar crown, and all models were loaded with 200 N to simulate centric and eccentric occlusion. The peak tensile and compressive stress and strain were calculated at the crestal cortical, trabecular, and apical cortical bone. The vertical and horizontal implant displacements were measured at the platform level. FEA indicated that subcrestal placement (SW and SO created lower stress and strain in the crestal cortical bone compared with crestal placement (BO and BW models. The SW model exhibited lesser vertical and horizontal implant micromovement compared with the SO and BO models under eccentric loading; however, stress and strain were higher in the apical cortical bone. The BW model exhibited the lowest implant displacement. These results indicate that subcrestal placement decreases the stress in the crestal cortical bone of dental implants, regardless of apical anchorage; however, apical cortical anchorage can be effective in limiting implant displacement. Further studies are required to evaluate the effects of possible remodeling around the apex on the success of subcrestal implants.

  8. Electrochemical disinfection of dental implants--a proof of concept.

    Directory of Open Access Journals (Sweden)

    Dirk Mohn

    Full Text Available BACKGROUND: Peri-implantitis has gained significant clinical attention in recent years. This disease is an inflammatory reaction to microorganisms around dental implants. Due to the limited accessibility, non-invasive antimicrobial strategies are of high interest. An unexpected approach to implant disinfection may evolve from electrolysis. Given the electrical conductivity of titanium implants, alkalinity or active oxidants can be generated in body fluids. We investigated the use of dental titanium implants as electrodes for the local generation of disinfectants. Our hypothesis was that electrolysis can reduce viable counts of adhering bacteria, and that this reduction should be greater if active oxidative species are generated. METHODOLOGY/PRINCIPAL FINDINGS: As model systems, dental implants, covered with a mono-species biofilm of Escherichia coli C43, were placed in photographic gelatin prepared with physiological saline. Implants were treated by a continuous current of 0-10 mA for 15 minutes. The reduction of viable counts was investigated on cathodes and anodes. In separate experiments, the local change in pH was visualized using color indicators embedded in the gelatin. Oxidative species were qualitatively detected by potassium iodide-starch paper. The in situ generated alkaline environment around cathodic implants caused a reduction of up to 2 orders of magnitude in viable E. coli counts. On anodic implants, in contrast to cathodic counterparts, oxidative species were detected. Here, a current of merely 7.5 mA caused complete kill of the bacteria. CONCLUSIONS/SIGNIFICANCE: This laboratory study shows that electrochemical treatment may provide access to a new way to decontaminate dental implants in situ.

  9. Factors influencing the fracture of dental implants.

    Science.gov (United States)

    Chrcanovic, Bruno Ramos; Kisch, Jenö; Albrektsson, Tomas; Wennerberg, Ann

    2018-02-01

    Implant fractures are rare but offer a challenging clinical situation. To determine the prevalence of implant fracture and the possible risk factors predisposing an implant to a higher fracture risk. This retrospective study is based on 2670 patients consecutively treated with implant-supported prostheses. Anatomical-, patient-, and implant-related factors were collected. Descriptive statistics and survival analyses were performed. Generalized estimating equations (GEE) evaluated the effect of explanatory variables on implant fracture. Forty-four implants (out of 10 099; 0.44%) fractured. The mean ± standard deviation time for fracture to occur was 95.1 ± 58.5 months (min-max, 3.8-294.7). Half of the occurrences of fracture happened between 2 and 8 years after implantation. Five factors had a statistically significant influence on the fracture of implants (increase/decrease in fracture probability): use of higher grades of titanium (decrease 72.9%), bruxism (increase 1819.5%), direct adjacency to cantilever (increase 247.6%), every 1 mm increase in implant length (increase 22.3%), every 1 mm increase in implant diameter (decrease 96.9%). It is suggested that 5 factors could influence the incidence of implant fractures: grade of titanium, implant diameter and length, cantilever, bruxism. © 2017 Wiley Periodicals, Inc.

  10. Fractographic analysis of fractured dental implant components

    Directory of Open Access Journals (Sweden)

    Chih-Ling Chang

    2013-03-01

    Conclusion: To avoid implant fracture, certain underlying mechanical risk factors should be noted such as patients with a habit of bruxism, bridgework with a cantilever design, or two implants installed in a line in the posterior mandible.

  11. Predoctoral Dental Students' Perceptions of Dental Implant Training: Effect of Preclinical Simulation and Clinical Experience.

    Science.gov (United States)

    Prasad, Soni; Bansal, Naveen

    2017-04-01

    The aims of this study were to assess 1) differences in perceptions of dental implant training between dental students who received didactic training alone (control group) and those who received didactic plus simulation training (test group); 2) differences in response between students with and without clinical experience in implant dentistry; and 3) the interaction effect of simulation training and clinical experience on students' satisfaction. A survey was distributed to the control group in 2014 and to the test group in 2015; both groups were at the same U.S. dental school. Data were collected on confidence levels with various implant restorative procedures along with overall satisfaction and number of implant restorations performed by each student. The response rate was 78.7% in the control group and 81.3% in the test group. In the control group, 85.7% of students reported being satisfied with implant training compared to 90.8% of students in the test group. The interaction effect of simulation training and clinical experience on overall student satisfaction was OR=1.5 at 95% CI: 0.8, 3.0. The students who had clinical experience with implant restorative procedures had significantly greater satisfaction than those who did not (OR=4.8, 95% CI: 2.1, 11.1, pstudents' confidence and satisfaction levels with implant education: they were almost five times more satisfied with implant training when clinical experience in implant restorative procedures was a part of their implant education.

  12. A Retrospective Analysis of Dental Implants Replacing Failed Implants in Grafted Maxillary Sinus: A Case Series.

    Science.gov (United States)

    Manor, Yifat; Chaushu, Gavriel; Lorean, Adi; Mijiritzky, Eithan

    2015-01-01

    To evaluate the survival rate of dental implants replacing failed implants in grafted maxillary sinuses using the lateral approach vs nongrafted posterior maxillae. A retrospective analysis was conducted to study the survival of secondary dental implants inserted in the posterior maxilla in previously failed implant sites between the years 2000 and 2010. The study group consisted of patients who had also undergone maxillary sinus augmentation, and the control group consisted of patients in whom implants in the posterior maxilla had failed. Clinical and demographic data were analyzed using a structured form. Seventy-five patients with a total of 75 replaced implants were included in the study. The study group comprised 40 patients and the control group, 35 patients. None of the replaced implants in the study group failed, resulting in an overall survival of 100%; three replaced implants in the control group failed (92% survival). The main reason for the primary implant removal was lack of osseointegration (35 [87.5%] of 40 study group implants and 23 [65.7%] of 35 control group implants [P = .027]). The difference between the groups with regard to the timing of primary implant failure was statistically significant. The study group had more early failures of the primary implant than did the control group (77% vs 62%; P = .038). Dental implants replaced in the posterior maxilla had a high survival rate. A higher rate of survival was found in augmented maxillary sinus sites. Within the limits of the present study, it can be concluded that previous implant failures in the grafted maxillary sinus should not discourage practitioners from a second attempt.

  13. Evaluation of the Effects of Dental Implants on Oral Lesions.

    Science.gov (United States)

    Agha-Hosseini, Farzaneh; Rohani, Bita

    2015-05-01

    To determine whether dental implants impress oral lesions, and to evaluate the nature of their effect on the lesions. A comprehensive search was done via Google and PubMed for articles (including case reports and literature reviews) containing the keywords 'oral squamous cell carcinoma' (OSCC), 'oral lichen planus' (OLP), 'lichenoid contact reaction' (LCR), 'osseointegrated implants', and 'dental implants' , in the last 10 years (2002-2012). The study included 24 articles involving patients with dental implants, and some oral lesions (e.g. oral lichen planus and oral squamous cell carcinoma) or with a history of lesions. In these publications, there is evidence suggesting the possibility of emergence, exacerbation, recurrence, or even malignant transformation of the oral lesions after implant placement in some cases. Based on our review of the literature, implant treatment does not seem to be completely safe under any circumstances, but may have some complications in subjects with certain diseases (e.g. oral lesions, autoimmune diseases, malignancies, allergic reactions, etc.). Therefore prior to treatment, patients should be fully informed of the risks. Implant treatment is best done with caution in patients with cancer or mucocutaneous disorders.

  14. Prevention and treatment of peri-implant diseases : Cleaning of titanium dental implant surfaces

    NARCIS (Netherlands)

    Louropoulou, A.

    2017-01-01

    The research presented in this thesis assessed the effect of variable instruments on differed titanium dental implant surfaces. Furthermore, a clinical guideline was developed and recommendations are made regarding the diagnosis, prevention and treatment of peri-implant diseases. Air abrasive

  15. Implant Insertion Torque: Its Role in Achieving Primary Stability of Restorable Dental Implants.

    Science.gov (United States)

    Greenstein, Gary; Cavallaro, John

    2017-02-01

    A literature review was conducted to determine the role of insertion torque in attaining primary stability of dental implants. The review is comprised of articles that discussed the amount of torque needed to achieve primary implant stability in healed ridges and fresh extraction sockets prior to immediate implant loading. Studies were appraised that addressed the effects of minimum and maximum forces that can be used to successfully place implants. The minimum torque that can be employed to attain primary stability is undefined. Forces ≥30 Ncm are routinely used to place implants into healed ridges and fresh extraction sockets prior to immediate loading of implants. Increased insertion torque (≥50 Ncm) reduces micromotion and does not appear to damage bone. In general, the healing process after implant insertion provides a degree of biologic stability that is similar whether implants are placed with high or low initial insertion torque. Primary stability is desirable when placing implants, but the absence of micromotion is what facilitates predictable implant osseointegration. Increased insertion torque helps achieve primary stability by reducing implant micromotion. Furthermore, tactile information provided by the first surgical twist drill can aid in selecting the initial insertion torque to achieve predictable stability of inserted dental implants.

  16. Oral Squamous Cell Carcinoma Associated with a Dental Implant: a case report and literature review

    OpenAIRE

    Moshref, Mohammad; Jamilian, Abdolreza; Lotfi, Ali; Showkatbakhsh,Rahman

    2011-01-01

    Objectives: Prosthodontic rehabilitation using dental implants has become a common practice in dentistry at the present time. Although severe complications related to dental osseointegrated implants are uncommon, in recent years several cases of oral squamous cell carcinoma adjacent to dental implants have been published. Study Design: A 67-year-old edentulous woman developed an oral squamous cell carcinoma around right mandibular implant about 12 months after receiving dental imp...

  17. Precision of Dental Implant Digitization Using Intraoral Scanners.

    Science.gov (United States)

    Flügge, Tabea V; Att, Wael; Metzger, Marc C; Nelson, Katja

    2016-01-01

    The digitization of scanbodies on dental implants is required to use computer-aided design/computer-assisted manufacture processes for implant prosthetics. Little is known about the accuracy of scanbody digitization with intraoral scanners and dental lab scanners. This study aimed to examine the precision of different intraoral digital impression systems as well as a dental lab scanner using commercially available implant scanbodies. Two study models with a different number and distribution of dental implant scanbodies were produced from conventional implant impressions. The study models were scanned using three different intraoral scanners (iTero, Cadent; Trios, 3Shape; and True Definition, 3M ESPE) and a dental lab scanner (D250, 3Shape). For each study model, 10 scans were performed per scanner to produce repeated measurements for the calculation of precision. The distance and angulation between the respective scanbodies were measured. The results of each scanning system were compared using analysis of variance, and post hoc Tukey test was conducted for a pairwise comparison of scanning devices. The precision values of the scanbodies varied according to the distance between the scanbodies and the scanning device. A distance of a single tooth space and a jaw-traversing distance between scanbodies produced significantly different results for distance and angle measurements between the scanning systems (P < .05). The precision of intraoral scanners and the dental lab scanner was significantly different. The precision of intraoral scanners decreased with an increasing distance between the scanbodies, whereas the precision of the dental lab scanner was independent of the distance between the scanbodies.

  18. Postradiotherapy Dental Implant Insertion Into Bone Grafts Harvested From Nonirradiated Tissue: Case Reports.

    Science.gov (United States)

    Kimoto, Akira; Shibuya, Yasuyuki; Kobayashi, Masaki; Akashi, Masaya; Hasegawa, Takumi; Suzuki, Hiroaki; Komori, Takahide

    2016-10-01

    Prostheses and dental implants are often used to aid oral rehabilitation after surgery (with/without radiotherapy) for oral cancer. However, some studies have reported that the insertion of dental implants into irradiated bone results in a higher frequency of implant failure than the insertion of such implants in nonirradiated bone. This report describes the cases of 4 patients with oral cancer who underwent surgery and radiotherapy (total dose: 50-86 Gy) and then had dental implants inserted within the irradiated area. In each case, an ilium bone graft or a latissimus dorsi myocutaneous flap containing scapular bone was transferred to the dental implant site before the insertion of the implants. Twenty-three implants were inserted. After loading, 2 implants were lost, and 21 remained stable. In patients who have undergone radiotherapy for oral cancer, transferring bone grafts harvested from nonirradiated tissue to the irradiated site before implant insertion might help to improve dental implant survival rates.

  19. Biomechanical analysis and comparison of 12 dental implant systems using 3D finite element study.

    Science.gov (United States)

    Liang, Rui; Guo, Weihua; Qiao, Xiangchen; Wen, Hailin; Yu, Mei; Tang, Wei; Liu, Lei; Wei, Yongtao; Tian, Weidong

    2015-01-01

    Finite element analysis plays an important role in dental implant design. The objective of this study was to show the effect of the overall geometry of dental implants on their biomechanics after implantation. In this study, 12 dental implants, with the same length, diameter and screw design, were simulated from different implant systems. Numerical model of right mandibular incisor bone segment was generated from CT data. The von-Mises stress distributions and the total deformation distributions under vertical/lateral load were compared for each implant by scores ranking method. The implants with cylindrical shapes had highest scores. Results indicated that cylindrical shape represented better geometry over taper implant. This study is helpful in choosing the optimal dental implant for clinical application and also contributes to individual implant design. Our study could also provide reference for choice and modification of dental implant in any other insertion sites and bone qualities.

  20. Consistency of Dental Hygiene Therapy Utilizing Various Dental Hygiene Instrumentation and Its Effect on Peri-implant Health and Survival of Dental Implants: A Retrospective Study.

    Science.gov (United States)

    Hoerler, Sarah B; Nietz, Sandra K; Zook, Victoria L; Lohse, Christine M; Salinas, Thomas J; Carr, Alan B; Assad, Daniel A

    The purpose of this retrospective study was to provide practice-based evidence to determine if the consistency of dental hygiene therapy, despite utilizing instrumentation literature that has proven to cause alterations to implant surfaces, affects peri-implant health or survival. The study sample comprised patients with implant-supported full-arch fixed dental prostheses who were distributed into two groups. The consistent hygiene group patients had dental hygiene therapy at a minimum biannually and were exposed to at least three dental hygiene instrument materials. The inconsistent hygiene group patients had dental hygiene therapy at a minimum once every 3 to 10 years and were exposed to at least three dental hygiene instrument materials. Years of survival free of soft tissue pathology and/or implant failure were estimated. Continuous features were summarized with medians, interquartile ranges (IQRs), and ranges; categorical features were summarized with frequency counts and percentages. Among 48 patients in the consistent hygiene group, 11 patients experienced soft tissue pathology or implant failure at a median of 11.3 years; among 99 patients in the inconsistent hygiene group, 17 patients experienced soft tissue pathology or implant failure at a median of 4.8 years. The survival free of soft tissue pathology or implant failure rate at 5 years was 94% for the consistent hygiene group and 91% for the inconsistent hygiene group. The survival free of soft tissue pathology or implant failure rate at 20 years was 70% for the consistent hygiene group and 79% for the inconsistent hygiene group (P = .91). Although no statistical differences were found between the groups, this practice-based evidence suggests more consistent dental hygiene therapy increases the median in years in which soft tissue pathology or implant failure is present.

  1. Bite force and dental implant treatment: a short review

    Directory of Open Access Journals (Sweden)

    Flanagan D

    2017-06-01

    Full Text Available Dennis Flanagan1,2 1Department of Dental Medicine, Implantology LUdeS Foundation, Ricasoli, Malta; 2Private Practice, Willimantic, CT, USA Abstract: Dental implants are placed endosseously, and the bone is the ultimate bearer of the occlusal load. Patients are not uniform in the maximum bite force they can generate. The occlusal biting load in the posterior jaw is usually about three times of that found in the anterior. It is possible for supporting implants to be overloaded by the patients’ biting force, resulting in bone loss and failure of the fixture. Bite force measurement may be an important parameter when planning dental implant treatment. Some patients can generate extreme biting loads that may cause a luxation of the fixture and subsequent loss of osseointegration. A patient with low biting force may be able to have a successful long-term outcome even with poor anatomical bone qualities. Patients with a high bite force capability may have an increased risk for late component fracture or implant failure. There is no correlation of any bite force value that would indicate any overload of a given implant in a given osseous site. Nonetheless, after bite force measurement, a qualitative judgement may be made by the clinician for the selection of an implant diameter and length and prosthetic design. Keywords: occlusal load, newtons, oral function, force, sensor, software

  2. Stress Distribution Around Dental Implants Placed at Different Depths.

    Science.gov (United States)

    Zanardi, Piero Rocha; Stegun, Roberto Chaib; Sesma, Newton; Costa, Bruno; Shibli, Jamil Awad; Laganá, Dalva Cruz

    2015-10-01

    The progressive bone loss at the neck of dental implant is a clinical concern since it affects the maintenance of dental aesthetics. The current study evaluated the influence of insertion depth, prosthetic connection, and type of loading on the stress distribution around dental implants, using photoelastic evaluation. A total of three blocks of photoelastic resin for each type of implant connection (external hexagon, external hexagon flattened, internal hexagon, and Morse taper) were built. Each block differed in the position of the implant platform in relative to the upper margin of the block: I (2 mm below), II (at the same level), and III (2 mm above). A force of 100 N was applied to both straight and tilted abutments. Totally, 4 selected points were evaluated at 1 side of the implant. Quantitative data were collected for the statistical analysis. A multiple linear regression showed the relation between the stress distribution and the insertion depth. For all the implant types, both with straight and tilted abutments, group I presented the lowest stress concentration around the fixture when compared with group II and III (P < 0.05). Within the limitations of this study, it could be concluded that the deeper the insertion, the lower the stress concentration.

  3. Bruxism and Dental Implants: A Meta-Analysis.

    Science.gov (United States)

    Chrcanovic, Bruno Ramos; Albrektsson, Tomas; Wennerberg, Ann

    2015-10-01

    To test the null hypothesis of no difference in the implant failure rates, postoperative infection, and marginal bone loss after the insertion of dental implants in bruxers compared with the insertion in non-bruxers against the alternative hypothesis of a difference. An electronic search was undertaken in June 2014. Eligibility criteria included clinical studies, either randomized or not. Ten publications were included with a total of 760 implants inserted in bruxers (49 failures; 6.45%) and 2989 in non-bruxers (109 failures; 3.65%). Due to lack of information, meta-analyses for the outcomes "postoperative infection" and "marginal bone loss" were not possible. A risk ratio of 2.93 was found (95% confidence interval, 1.48-5.81; P = 0.002). These results cannot suggest that the insertion of dental implants in bruxers affects the implant failure rates due to a limited number of published studies, all characterized by a low level of specificity, and most of them deal with a limited number of cases without a control group. Therefore, the real effect of bruxing habits on the osseointegration and survival of endosteal dental implants is still not well established.

  4. Update in dental implant periapical surgery.

    Science.gov (United States)

    Peñarrocha Diago, Miguel; Boronat López, Araceli; Lamas Pelayo, Joana

    2006-08-01

    Implant periapical lesions are infectious-inflammatory alterations surrounding an implant apex, and can be caused by a number of situations--including contamination at instrumentation, overheating of bone, and the prior existence of bone pathology. The diagnosis is based on the clinical manifestations and radiological findings, where a radiotransparency can be seen at periapical level. The lesions are classified according to their evolutive stage as either acute (non-suppurated and suppurated) or chronic (or periapical abscess). The management of implant periapical lesions comprises periapical surgery with curettage and irrigation in the acute phase, or implant extraction when the bone surface is affected and/or primary fixation is lost (chronic phase).

  5. Medication-Related Osteonecrosis of the Jaw Around Dental Implants: Implant Surgery-Triggered or Implant Presence-Triggered Osteonecrosis?

    Science.gov (United States)

    Giovannacci, Ilaria; Meleti, Marco; Manfredi, Maddalena; Mortellaro, Carmen; Greco Lucchina, Alberta; Bonanini, Mauro; Vescovi, Paolo

    2016-05-01

    Dentoalveolar surgery including tooth extractions and dental implants placement is considered the major risk factor for developing medication-related osteonecrosis of the jaw (MRONJ).In this study, a patient series of MRONJ around dental implants were carefully analyzed to describe the findings and to assess the possible risk factors. Fifteen patients with peri-implant bone osteonecrosis were selected out of a group of 250 patients (6%). Patients were divided into 2 groups according to the temporal relationship. Group 1 (G1)-necrosis immediately after implant placement (from 2 to 10 months) and defined as "implant surgery-triggered" MRONJ. Group 2-necrosis distant (from 1 to 15 years) from implant placement and defined as "implant presence-triggered" MRONJ. Epidemiological and pharmacological variables were recorded as well as specific data about osteonecrosis and dental implants. G1 included 6 patients: 5 (83.4%) treated with oral bisphosphonates (BPs) for osteoporosis and 1 (16.6%) with intravenous BPs for breast cancer. Mean duration of BP therapy (BPT) was 83.7 months. G2 included 9 patients: 8 patients (88.89%) treated with intravenous BPs for malignant disease and 1 (11.11%) with oral BPs for osteoporosis. Data confirms that not only surgical insertion of dental implants is a potential risk factor for the development of osteonecrosis but also the presence itself of the implant into the bone can be associated with this disease. Therefore, it is necessary to inform of the increased risk for MRONJ also the patients who have already osteointegrated implants and are going to start the BPT.The risk is lower for patients receiving oral BPs but it exists and seems to be higher if the implant is located in the posterior areas, if the duration of BPT is more than 3 years and if the patient is under corticosteroid therapy.

  6. Design of dental implants, influence on the osteogenesis and fixation.

    Science.gov (United States)

    Vasconcellos, Luana M R; Oliveira, Marize V; Graça, Mário L A; Vasconcellos, Luis G O; Cairo, Carlos A A; Carvalho, Yasmin R

    2008-08-01

    The fixation and the bone ingrowth at the interface of porous cylindrical implants (total porosity of 37% and average pores diameter of 480 microm) were compared in vivo to rough cylindrical implants (R (a) = 5.3 microm), both of commercially pure titanium, made by powder metallurgy. The implants were inserted into the tibias of 20 rabbits and the animals were sacrificed 4 and 8 weeks after surgery. The percentage of bone-implant contact observed in porous implant was significantly larger than in the rough ones for all of sacrifice periods, respectively, 57% vs. 46% after 4 weeks, and 59% vs. 50% after 8 weeks. The mechanical tests showed a significant increase in the shear strength of the porous implants for the two analyzed periods, 4 and 8 weeks (14 and 20 MPa), when compared with rough ones (4 and 13 MPa). These results suggest that porous implants improve the contact at the implant-bone interface and increase the fixation to the bone, improving the osseointegration. Thus, the porous implant might be an alternative to dental implant in less favorable conditions, and appear to be better fixed to bone, offering promising alternatives.

  7. Evaluation of bone loss in antibacterial coated dental implants: An experimental study in dogs

    DEFF Research Database (Denmark)

    Gallardo, Maria Godoy; Manzanares-Céspedes, Maria Cristina; Sevilla, Pablo

    2016-01-01

    The aim of this study was to evaluate the in vivo effect of antibacterial modified dental implants in the first stages of peri-implantitis. Thirty dental implants were inserted in the mandibular premolar sites of 5 beagle dogs. Sites were randomly assigned to Ti (untreated implants, 10 units), Ti...

  8. Knowledge and awareness of dental implants among elderly people in Croatia.

    Science.gov (United States)

    Kranjcic, Josip; Mikus, Anja; Mehulic, Ketij; Vojvodic, Denis

    2015-01-01

    The use of inserted dental implants is growing every day in order to improve retention and stability of complete removable dental prostheses (RDPs), especially in the mandible. Therefore, the aim of this study was to examine the knowledge and awareness of dental implants among elderly people wearing complete RDPs. This study, based on answers from a questionnaire designed for the purpose of this study, included 301 participants wearing complete RDPs from elderly care homes with average age of 74 years. The awareness of dental implants was statistically significantly (p dental implants (56.5%; p dental implants (56.1%; p dental implants (59.4%; p dental implants (82.4%; p dental implants, this did not mean they were well informed about the implant insertion procedure and the costs for such a treatment. In conclusion, awareness of dental implants in studied participants was insufficient. The results reinforce the need for better education and the provision of proper information to elderly people about dental implants and implant treatment options. © 2014 by the American College of Prosthodontists.

  9. Tilted versus axially placed dental implants: a meta-analysis.

    Science.gov (United States)

    Chrcanovic, Bruno Ramos; Albrektsson, Tomas; Wennerberg, Ann

    2015-02-01

    The purpose of the present review was to test the null hypothesis of no difference in the implant failure rate, marginal bone loss, and postoperative infection for patients being rehabilitated by tilted or by axially placed dental implants, against the alternative hypothesis of a difference. An electronic search without time or language restrictions was undertaken in July 2014. Eligibility criteria included clinical human studies, either randomised or not, interventional or observational. The estimates of an intervention were expressed in risk ratio (RR) and mean difference (MD) in millimetres. The search strategy resulted in 44 publications. A total of 5029 dental implants were tilted (82 failures; 1.63%), and 5732 implants were axially placed (104 failures; 1.81%). The difference between the procedures did not significantly affect the implant failure rates (P=0.40), with a RR of 1.14 (95% CI 0.84-1.56). A statistically significant difference was found for implant failures when studies evaluating implants inserted in maxillae only were pooled (RR 1.70, 95% CI 1.05-2.74; P=0.03), the same not happening for the mandible (RR 0.77, 95% CI 0.39-1.52; P=0.45). There were no apparent significant effects of tilted dental implants on the occurrence of marginal bone loss (MD 0.03, 95% CI -0.03 to 0.08; P=0.32). Due to lack of satisfactory information, meta-analysis for the outcome 'postoperative infection' was not performed. It is suggested that the differences in angulation of dental implants might not affect the implant survival or the marginal bone loss. The reliability and validity of the data collected and the potential for biases and confounding factors are some of the shortcomings of the present study. The question whether tilted implants are more at risk for failure than axially placed implants has received increasing attention in the last years. As the philosophies of treatment alter over time, a periodic review of the different concepts is necessary to refine

  10. Dental student perceptions of predoctoral implant education and plans for providing implant treatment.

    Science.gov (United States)

    Yuan, Judy Chia-Chun; Kaste, Linda M; Lee, Damian J; Harlow, Rand F; Knoernschild, Kent L; Campbell, Stephen D; Sukotjo, Cortino

    2011-06-01

    This study aims to identify dental students' perceptions of pre-patient care laboratory exercises (PCLEs) and clinical experiences that influence their future plans for providing implant care. One of two questionnaires was administered to dental student classes at one dental school (D2: Survey 1; D3 and D4: Survey 2). Future plans as graduates to provide implant diagnosis and treatment planning (DxTP), restoration of single-tooth implants (STIs), and implant-retained overdentures (IODs) were cross-sectionally assessed along with potential influences such as PCLE, clinical experiences, gender, and class. The majority of students planned to provide implant services after graduation (DxTP 68.9 percent; STI 61.2 percent; IOD 62.1 percent). Bivariately, males reflected more preparedness from PCLEs than females (p=.002) and the D2 students more than D3 and D4 students (pimplant therapy. However, this varied by gender and class. These findings indicate that PCLEs are important for their influence on students' future plans to provide implant therapy. However, further studies are needed to validate actual PCLEs and clinical implant practices (both longitudinally and for other schools) and to determine educational interventions to optimize the provision of implant care.

  11. Immediate loading of dental implants: review of the literature.

    Science.gov (United States)

    Joshi, Nikhil; Joshi, Mahasweta; Angadi, Prabhakar

    2011-01-01

    This study was conducted with the objective of examining and elaborating on the latest trends in the immediate loading of dental implants. It reviewed the materials and different techniques employed in immediate/early loading of implants in studies published since 2008. Articles were selected on the basis of a PubMed search that included controlled clinical studies of immediate loading of dental implants from the year 2008 onward. The inclusion criteria were a minimum of 10 patients in each group and a clinical follow-up period of at least 1 year. The technique of immediately loaded implants has become more predictable; researchers are exploring novel ways of employing the technique with fewer implants, zygomatic implants, and surface modification of implants. The prosthetic phase of immediate loading also has been simplified. In particular, the results of immediate loading in the maxilla have become more predictable and the selection criteria of patients and location for immediate loading have become more liberal, as envisaged in this review.

  12. Soft tissue wound healing around teeth and dental implants.

    Science.gov (United States)

    Sculean, Anton; Gruber, Reinhard; Bosshardt, Dieter D

    2014-04-01

    To provide an overview on the biology and soft tissue wound healing around teeth and dental implants. This narrative review focuses on cell biology and histology of soft tissue wounds around natural teeth and dental implants. The available data indicate that: (a) Oral wounds follow a similar pattern. (b) The tissue specificities of the gingival, alveolar and palatal mucosa appear to be innately and not necessarily functionally determined. (c) The granulation tissue originating from the periodontal ligament or from connective tissue originally covered by keratinized epithelium has the potential to induce keratinization. However, it also appears that deep palatal connective tissue may not have the same potential to induce keratinization as the palatal connective tissue originating from an immediately subepithelial area. (d) Epithelial healing following non-surgical and surgical periodontal therapy appears to be completed after a period of 7–14 days. Structural integrity of a maturing wound between a denuded root surface and a soft tissue flap is achieved at approximately 14-days post-surgery. (e) The formation of the biological width and maturation of the barrier function around transmucosal implants requires 6–8 weeks of healing. (f) The established peri-implant soft connective tissue resembles a scar tissue in composition, fibre orientation, and vasculature. (g) The peri-implant junctional epithelium may reach a greater final length under certain conditions such as implants placed into fresh extraction sockets versus conventional implant procedures in healed sites. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  13. Immediate dental implant placement in the aesthetic zone

    NARCIS (Netherlands)

    Slagter, Kirsten Willemijn

    2016-01-01

    After pulling a tooth when aesthetics play a role, there is a tendency to place a dental implant immediately after pulling the tooth, preferably in combination with a temporary crown. This tendency is probably related to evolving society factors, with more demanding patients and a wish for an

  14. Impact Of Dental Anxiety On The Decision To Have Implant Treatment.

    Science.gov (United States)

    Lalabonova, Christina K

    2015-01-01

    Dental implants are increasingly used in modern dentistry as anchors for prosthetic restorations. Anxiety is a complex phenomenon which can become a risk factor for suppression of many functions of the body. The aim of this study was to investigate the effect dental anxiety exerts on the choice of method of treatment by patients wanting to have dental implants. The study included 174 patients that were referred to us for dental implants placement because of partial or total loss of teeth. Their dental anxiety was measured using the Dental Anxiety Scale (DAS) proposed by Norman Corah. The patients decided to have or refused to have treatment with dental implants either because they had dental anxiety or gave other reasons. Distribution of patients by level of anxiety was as follows: 33% were anxiety free, in 34% the dental anxiety was moderate, 25% had severe anxiety, and 8% experienced an extremely severe anxiety. Dental fear was given as a reason for refusal of treatment by 24.1% of the patients wanting to have dental implants. Of the patients wanting to have dental implants, 40.8% decided to proceed with the treatment; these patients exhibited low dental anxiety. The decision to have dental treatment with implants is affected by the patient's level of dental anxiety. Only those with low level of dental anxiety decide to proceed with such a treatment. The mild anxiety some patients experience is beneficial as it eliminates a risk factor that may hinder the process of osseointegration.

  15. Influence of implant/abutment joint designs on abutment screw loosening in a dental implant system.

    Science.gov (United States)

    Kitagawa, Tsuyoshi; Tanimoto, Yasuhiro; Odaki, Misako; Nemoto, Kimiya; Aida, Masahiro

    2005-11-01

    The objective of this study was to investigate the influence of implant/abutment joint designs on abutment screw loosening in a dental implant system, using nonlinear dynamic analysis of the finite element method (FEM). This finite element simulation study used two dental implant systems: the Ankylos implant system (Degusa Dental, Hanau, German) with a taper joint (taper joint-type model), and the Bränemark implant system (Nobel Biocare, Gothenburg, Sweden) with an external hex joint (external hex joint-type model). The nonlinear dynamic analysis was performed using three-dimensional finite element analysis. In comparing the movement of the taper type-joint model and external hex type-joint model, it was found that the external hex type-joint model had greater movement than the taper type-joint model. The external hex joint-type model showed rotation movement, whereas the movement of the taper joint-type model showed no rotation. It was concluded that the nonlinear dynamic analysis used in this study clearly demonstrated the differences in rotation of components in dental implant systems with taper or external hex joints. Copyright (c) 2005 Wiley Periodicals, Inc.

  16. Comparison of two multiaxial fatigue models applied to dental implants

    Directory of Open Access Journals (Sweden)

    JM. Ayllon

    2015-07-01

    Full Text Available This paper presents two multiaxial fatigue life prediction models applied to a commercial dental implant. One model is called Variable Initiation Length Model and takes into account both the crack initiation and propagation phases. The second model combines the Theory of Critical Distance with a critical plane damage model to characterise the initiation and initial propagation of micro/meso cracks in the material. This paper discusses which material properties are necessary for the implementation of these models and how to obtain them in the laboratory from simple test specimens. It also describes the FE models developed for the stress/strain and stress intensity factor characterisation in the implant. The results of applying both life prediction models are compared with experimental results arising from the application of ISO-14801 standard to a commercial dental implant.

  17. Intraoral radiography and dental implant restoration.

    Science.gov (United States)

    Wadhwani, Chandurp P K; Schuler, Ralf; Taylor, Stuart; Chen, Curtis S K

    2012-08-01

    The usefulness of IOR has been described along with its limitations when considering implant restorations. One major issue is the alignment of the incident x-rays so that they are consistently perpendicular to the implant body, to provide the most reliable information possible. Other limitations include inconsistencies as a result of the inability to verify the nature and extent of bone around an implant, which is subject to variation as a result of type of bone and site. Where implants are concerned, as a diagnostic tool IOR should be considered as part of a multitude of tests-including probing, mobility, symptoms, and other soft-tissue evaluations. It must be emphasized that IOR cannot be relied upon as being the sole diagnostic test.

  18. A Survey of Dental Implant Instruction in Predoctoral Dental Curricula in North America.

    Science.gov (United States)

    Kihara, Hidemichi; Sun, Jie; Sakai, Maiko; Nagai, Shigemi; Da Silva, John

    2017-09-01

    The aim of this study was to investigate the extent and forms of predoctoral implant dentistry instruction in North American dental schools and to identify future directions and challenges. The survey collected data on curriculum content, departmental oversight, techniques, and materials, as well as current problems to be solved. The 30-question survey was sent in 2012 to the dean or administrator in charge of the predoctoral curriculum of all 73 dental schools in the U.S. and Canada at the time; four reminders were sent. Forty-seven schools responded, for a response rate of 64%. Of the 47 responding schools, 46 (98%) offered didactic instruction (mean of 17 hours); 87% had a laboratory component (mean of 14.46 hours); and 57% had a clinical requirement. In the responding schools, students had an average of 1.85 implant restorative cases and 0.61 surgical cases. Forty-two of the schools (89%) had implemented observation of implant surgery and/or assisting with implant surgery in their curricula. Major challenges reported in implementing a comprehensive predoctoral implant curriculum included expense of implant systems to the schools and to patients, shortage of predoctoral cases, and lack of curriculum time and trained faculty. These results show that implant education for predoctoral dental students continues to expand, with a trend towards more preclinical exercises and clinical experiences and fewer didactic courses.

  19. The Ukrainian Dental Market: Characteristics of Demand for Services in the Segment of Dental Implantation

    Directory of Open Access Journals (Sweden)

    Slipchenko Tetiana O.

    2017-05-01

    Full Text Available The article is aimed at analyzing the market for dental services in Ukraine in the implantology segment, studying the demand factors for these services and developing a system of measures to manage the demand for dental implantation services. It has been proven that the market for dental services according to a complex of its attributes is more in line with the type of market of monopolistic competition. One of the promising ways of developing the dental market is to transform producers of dental services into the vertically integrated holdings. As one of the specific features of the dental services market is allocated the asymmetry of information, which leads to a conflict between the medical and economic interests of dentists. The price and non-price factors of demand for dental implantation services were determined, the prime cost structure of a dental service was analyzed. The characteristic attributes of a medical service have been defined as consistently defined actions or a complex of actions by medical personnel aimed at prevention, diagnosis, treatment, and rehabilitation, which have a self-contained complete meaning and a certain price.

  20. Long-term evaluations of teeth and dental implants during dental maintenance period.

    Science.gov (United States)

    Yoon, Da-Le; Kim, Yong-Gun; Cho, Jin-Hyun; Lee, Jae-Mok; Lee, Sang-Kyu

    2017-06-01

    This study was designed to evaluate the teeth and dental implants during dental maintenance therapy over 3 years in different conditions after periodontal and dental prosthetic treatment. 166 patients received maintenance therapy. 59 patients were treated with 2% minocycline-HCl ointment as local drug delivery (LDD) (L group) and 107 patients were treated without LDD (NL group). Clinical data was collected in maintenance period for evaluation. Patients were classified into groups depending on the application of LDD with maintenance therapy, the type of dental treatment before maintenance period (Pre-Tx), the frequency (F-MT), and regularity (R-MT) of maintenance therapy. The numbers of lost teeth (N-teeth, P=.003) and newly placed dental implants (N-implants, P=.022) are significantly different according to Pre-Tx. F-MT among patients who received surgical dental treatment before maintenance period showed statistical differences in N-teeth (P=.041), but not in N-implants (P=.564). All of the patients in L group showed high F-MT (F-MT1). In NL group, there were no statistical differences in N-teeth or N-implants according to F-MT or R-MT. In F-MT1 group, application of LDD made N-teeth significantly different from both Pre-Tx groups while no significant difference could be found in N-implant. Independent t-test and one-way ANOVA were selected for statistical analysis. The regular maintenance therapy and LDD can be effective for teeth during maintenance period. It is not only pharmacological efficacy in decreasing bacterial species that makes LDD a useful adjunct. Application of LDD also motivates patients to take adequate check-ups in the aspects of both frequency and regularity.

  1. Design optimization of a radial functionally graded dental implant.

    Science.gov (United States)

    Ichim, Paul I; Hu, Xiaozhi; Bazen, Jennifer J; Yi, Wei

    2016-01-01

    In this work, we use FEA to test the hypothesis that a low-modulus coating of a cylindrical zirconia dental implant would reduce the stresses in the peri-implant bone and we use design optimization and the rule of mixture to estimate the elastic modulus and the porosity of the coating that provides optimal stress shielding. We show that a low-modulus coating of a dental implant significantly reduces the maximum stresses in the peri-implant bone without affecting the average stresses thus creating a potentially favorable biomechanical environment. Our results suggest that a resilient coating is capable of reducing the maximum compressive and tensile stresses in the peri-implant bone by up to 50% and the average stresses in the peri-implant bone by up to 15%. We further show that a transitional gradient between the high-modulus core and the low-modulus coating is not necessary and for a considered zirconia/HA composite the optimal thickness of the coating is 100 µ with its optimal elastic at the lowest value considered of 45 GPa. © 2015 Wiley Periodicals, Inc.

  2. Bite force and dental implant treatment: a short review

    Science.gov (United States)

    Flanagan, Dennis

    2017-01-01

    Dental implants are placed endosseously, and the bone is the ultimate bearer of the occlusal load. Patients are not uniform in the maximum bite force they can generate. The occlusal biting load in the posterior jaw is usually about three times of that found in the anterior. It is possible for supporting implants to be overloaded by the patients’ biting force, resulting in bone loss and failure of the fixture. Bite force measurement may be an important parameter when planning dental implant treatment. Some patients can generate extreme biting loads that may cause a luxation of the fixture and subsequent loss of osseointegration. A patient with low biting force may be able to have a successful long-term outcome even with poor anatomical bone qualities. Patients with a high bite force capability may have an increased risk for late component fracture or implant failure. There is no correlation of any bite force value that would indicate any overload of a given implant in a given osseous site. Nonetheless, after bite force measurement, a qualitative judgement may be made by the clinician for the selection of an implant diameter and length and prosthetic design. PMID:28721107

  3. Mechanical and Spectroscopic Analysis of Retrieved/Failed Dental Implants

    Directory of Open Access Journals (Sweden)

    Umer Daood

    2017-11-01

    Full Text Available The purpose of this study was to examine surface alterations and bone formation on the surface of failed dental implants (Straumann [ST] and TiUnite [TiUn] removed due to any biological reason. In addition, failure analysis was performed to test mechanical properties. Dental implants (n = 38 from two manufacturers were collected and subjected to chemical cleaning. The presence of newly formed hydroxyapatite bone around failed implants was evaluated using micro-Raman spectroscopy. Scanning electron microscopy was used to identify surface defects. Mechanical testing was performed using a Minneapolis servo-hydraulic system (MTS along with indentation using a universal testing machine and average values were recorded. A statistical analysis of mechanical properties was done using an unpaired t test, and correlation between observed defects was evaluated using Chi-square (p = 0.05. Apatite-formation was evident in both implants, but was found qualitatively more in the ST group. No significant difference was found in indentation between the two groups (p > 0.05. The percentage of “no defects” was significantly lower in the ST group (71%. Crack-like and full-crack defects were observed in 49% and 39% of TiUn. The ST group showed 11,061 cycles to failure as compared with 10,021 cycles in the TiUnite group. Implant failure mechanisms are complex with a combination of mechanical and biological reasons and these factors are variable with different implant systems.

  4. Fatigue failure of dental implants in simulated intraoral media.

    Science.gov (United States)

    Shemtov-Yona, K; Rittel, D

    2016-09-01

    Metallic dental implants are exposed to various intraoral environments and repetitive loads during service. Relatively few studies have systematically addressed the potential influence of the environment on the mechanical integrity of the implants, which is therefore the subject of this study. Four media (groups) were selected for room temperature testing, namely dry air, saliva substitute, same with 250ppm of fluoride, and saline solution (0.9%). Monolithic Ti-6Al-4V implants were loaded until fracture, using random spectrum loading. The study reveals that the only aggressive medium of all is the saline solution, as it shortens significantly the spectrum fatigue life of the implants. The quantitative scanning electron fractographic analysis indicates that all the tested implants grew fatigue cracks of similar lengths prior to catastrophic fracture. However, the average crack growth rate in the saline medium was found to largely exceed that in other media, suggesting a decreased fracture toughness. The notion of a characteristic timescale for environmental degradation was proposed to explain the results of our spectrum tests that blend randomly low and high cycle fatigue. Random spectrum fatigue testing is powerful technique to assess and compare the mechanical performance of dental implants for various designs and/or environments. Copyright © 2016 Elsevier Ltd. All rights reserved.

  5. Immediate loading of dental implants in the edentulous maxilla.

    Science.gov (United States)

    Eccellente, Tammaro; Piombino, Michele; Piattelli, Adriano; D'Alimonte, Emanuela; Perrotti, Vittoria; Iezzi, Giovanna

    2011-04-01

    Immediate loading of dental implants in the edentulous mandible has proven to be an effective, reliable, and predictable procedure. There is little long-term data available on similar treatments in the edentulous maxilla. The aim of the present study was to clinically evaluate edentulous maxilla rehabilitation with removable prostheses supported by the Ankylos SynCone (Dentsply-Friadent) system. The treatment method was based on immediate loading of four implants in the completely edentulous maxilla. A total of 180 implants were inserted in 45 patients. Dentures were placed on and retained by prefabricated conical crowns that were inserted into the existing denture base by direct intraoral polymerization immediately after surgery and supported by corresponding conical primary implant abutments. During the observation period, two implants (1.11%) were removed due to the lack of osseointegration. One implant was removed due to peri-implantitis, and one other (0.55%) implant was removed because of a fracture after 6 months of function. The overall implant survival rate was 97.77%, while the prosthesis survival rate was 100%. Swelling or suppuration was not observed. After a total observation period of 26.7 months (range 12 to 54 months), all implants had healthy peri-implant soft tissue that showed low values of clinical parameters. Only seven implants (3.97%) presented a sulcus bleeding index of 3. This method facilitates edentulous maxilla rehabilitation with removable prostheses. The conical crown concept presented resulted in stable complete-denture retention, reduced denture base, and improved oral hygiene.

  6. Reconstruction of mandibular vertical defects for dental implants with autogenous bone block grafts using a tunnel approach: clinical study of 50 cases.

    Science.gov (United States)

    Restoy-Lozano, A; Dominguez-Mompell, J L; Infante-Cossio, P; Lara-Chao, J; Espin-Galvez, F; Lopez-Pizarro, V

    2015-11-01

    The objective of this study was to evaluate the outcomes of mandibular vertical defect reconstruction with autologous bone and the use of a sub-periosteal tunnel approach in preparation for dental implant insertion. Forty-three consecutive patients with an atrophic posterior mandible were reconstructed using this method. Two thin laminae of cortical bone, obtained by splitting blocks harvested from the retromolar area, were fixed in a box-like framework containing cancellous and particulate bone. The goal was to achieve an alveolar ridge width of ≥5.5mm and an effective bone height (EBH) of ≥10.5mm for dental implant insertion (≥3.4mm diameter, ≥9.5mm length). Fifty reconstruction procedures were performed. The mean EBH was 7.1±1.3mm pre-treatment and 12.3±1.1mm post-treatment (mean increase 5.2±1.4mm). Complete graft loss was recorded in two cases; the remaining complications were minor. After a mean consolidation period of 3.5 months, 96 dental implants were placed. No failure of osseointegration was observed at follow-up (mean 32.9 months). The average bone height reduction was 0.9mm (graft vertical resorption 17.4%). Reconstruction of posterior mandibular vertical defects using two autogenous cortical bone blocks with particulate bone between them, combined with a tunnelling technique, provided good healing with no wound dehiscence and minimum resorption of the grafted bone, favouring a substantial vertical bone gain. Copyright © 2015 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  7. Biomechanical Behavior of the Dental Implant Macrodesign.

    Science.gov (United States)

    Lima de Andrade, Camila; Carvalho, Marco Aurélio; Bordin, Dimorvan; da Silva, Wander José; Del Bel Cury, Altair Antoninha; Sotto-Maior, Bruno Salles

    The aim of this study was to evaluate the influence of implant macrodesign when using different types of collar and thread designs on stress/strain distributions in a maxillary bone site. Six groups were obtained from the combination of two collar designs (smooth and microthread) and three thread shapes (square, trapezoidal, and triangular) in external hexagon implants (4 × 10 mm) supporting a single zirconia crown in the maxillary first molar region. A 200-N axial occlusal load was applied to the crown, and measurements were made of the von Mises stress (σ vM ) for the implant, and tensile stress (σ max ), shear stress (τ max ), and strain (ε max ) for the surrounding bone using tridimensional finite element analysis. The main effects of each level of the two factors investigated (collar and thread designs) were evaluated by one-way analysis of variance (ANOVA) at a 5% significance level. Collar design was the main factor of influence on von Mises stress in the implant and stresses/strain in the cortical bone, while thread design was the main factor of influence on stresses in the trabecular bone (P collar design able to produce more favorable stress/strain distribution was the microthreaded design for the cortical bone. For the trabecular bone, the triangular thread shape had the lowest stresses and strain values among the square and trapezoidal implants. Stress/strain distribution patterns were influenced by collar design in the implant and cortical bone, and by thread design in the trabecular bone. Microthreads and triangular thread-shape designs presented improved biomechanical behavior in posterior maxillary bone when compared with the smooth collar design and trapezoidal and square-shaped threads.

  8. Subperiosteal osteoid osteoma: radiographic and pathologic manifestations

    Energy Technology Data Exchange (ETDEWEB)

    Shankman, S. [Department of Radiology, Hospital for Joint Diseases/OI, 301 East 17th Street, New York, NY 10003 (United States); Desai, P. [Department of Pathology, Hospital for Joint Diseases/OI, 301 East 17th Street, New York, NY 10003 (United States); Beltran, J. [Department of Radiology, Hospital for Joint Diseases/OI, 301 East 17th Street, New York, NY 10003 (United States)

    1997-08-01

    Objective.To demonstrate the radiologic and pathologic manifestations of osteoid osteoma arising beneath the periosteum, on the surface of the bone. Design. One hundred and sixty osteoid osteomas were seen over a 30-year period. The radiologic, pathologic and operative findings of those that were subperiosteal were reviewed. Patients. Eleven patients with subperiosteal osteoid osteoma were reviewed. The patients ranged in age from 13 to 36 years with a mean of 24 years. Eight were male and three were female. Results and conclusion. Eleven subperiosteal lesions were studied. The reactive periostitis of four lesions was atypical and misleading. Four lesions had features similar to the more common intracortical variety. Three lesions occurring within the joint like other intra-articular lesions were barely seen on plain radiographs. Bone scan and CT scan were virtually diagnostic. The histopathology of these lesions was also atypical though not misleading. In conclusion, subperiosteal osteoid osteoma is a rare lesion with atypical radiographic and histopathologic features. The unusual reactive periostitis seen in several extra-articular cases may suggest other diagnoses. (orig.). With 4 figs., 2 tabs.

  9. [Dental implants following trauma in young adults].

    Science.gov (United States)

    Kohavi, D; Dikapua, L; Rosenfeld, P; Tarazi, E

    2003-07-01

    Various statistics have shown that avulsion (total displacement of tooth out of its socket) following traumatic injuries is relatively infrequent, ranging from 0.5 to 16% of traumatic injuries in the permanent dentition. The maxillary central incisors are the most frequently avulsed teeth. Avulsion of teeth occurs most often in children from 7 to 9 years of age, when the permanent incisors are erupting. Most frequently, avulsion involves a single tooth; but multiple avulsion are occasionally encountered. Fractures of the alveolar socket wall are often associate with avulsion. After the tooth is lost, an almost certain sequelae is the rapid resorption of alveolar bone. In many cases, only a very thin crestal bony lamella remains after healing of the alveolus, with clinically obvious horizontal and vertical depressions. In a young patient missing an anterior tooth, the operator may find implant insertion, in the proper anatomical position, difficult or impossible, because of inadequate bone volume. This situation aggravates with time because of continuous resorption and relative growth of the adjacent alveolar bone around the teeth. New and predictable bone augmentation techniques allow compensation for bone reduction while waiting for completion of growth. In cases of localized ridge augmentation, the amount of initial bone volume and its shape dictate whether implant insertion and bone augmentation will be performed simultaneously. The indications for this approach are: sufficient bone volume to achieve initial implant stability and a predictably high success rate for the augmentation. When bone volume and shape do not allow for initial stability, there is indication for a staged approach, in which the bone is initially augmented, the results are evaluated and the implant is then inserted. The first stage, the bone regeneration phase, may last between 8-10 months. The second, the implant integration period, may take an additional 6-8 months. The effect of growth on

  10. Allergic contact dermatitis caused by titanium screws and dental implants.

    Science.gov (United States)

    Hosoki, Maki; Nishigawa, Keisuke; Miyamoto, Youji; Ohe, Go; Matsuka, Yoshizo

    2016-07-01

    Titanium has been considered to be a non-allergenic material. However, several studies have reported cases of metal allergy caused by titanium-containing materials. We describe a 69-year-old male for whom significant pathologic findings around dental implants had never been observed. He exhibited allergic symptoms (eczema) after orthopedic surgery. The titanium screws used in the orthopedic surgery that he underwent were removed 1 year later, but the eczema remained. After removal of dental implants, the eczema disappeared completely. Titanium is used not only for medical applications such as plastic surgery and/or dental implants, but also for paints, white pigments, photocatalysts, and various types of everyday goods. Most of the usage of titanium is in the form of titanium dioxide. This rapid expansion of titanium-containing products has increased percutaneous and permucosal exposure of titanium to the population. In general, allergic risk of titanium material is smaller than that of other metal materials. However, we suggest that pre-implant patients should be asked about a history of hypersensitivity reactions to metals, and patch testing should be recommended to patients who have experienced such reactions. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  11. Dynamics of dental implants and orthodontics in today's periodontal prosthesis.

    Science.gov (United States)

    Cheng, Y M

    2000-03-01

    Periodontal prosthesis refers to multidisciplinary efforts to stop disease progression, correct deformities created by dental diseases, and establish a therapeutic occlusion to restore the form and function of the masticatory system. These efforts are critical for the long-term prognosis and maintenance of the guarded teeth and the overall prosthesis. This article presents a functionally and esthetically challenging case, which illustrates a multidisciplinary approach--specifically implantology and orthodontics--and how they impact on each other during treatment. The role and importance of dental implants and orthodontics in setting up a case is illustrated in this article.

  12. Progressive immediate loading of a perforated maxillary sinus dental implant: a case report

    OpenAIRE

    Al-Juboori, Mohammed Jasim

    2015-01-01

    Mohammed Jasim Al-Juboori Department of Oral Surgery, MAHSA University, Kuala Lumpur, Malaysia Abstract: The displacement of a dental implant into the maxillary sinus may lead to implant failure due to exposure of the apical third or the tip of the implant beyond the bone, resulting in soft tissue growth. This case report discusses dental implant placement in the upper first molar area with maxillary sinus involvement of approximately 2 mm. A new technique for progressive implant loading was...

  13. The effect of radiotherapy on survival of dental implants in head and neck cancer patients

    OpenAIRE

    Shugaa-Addin, Bassam; Al-Shamiri, Hashem M.; Al-Maweri, Sadeq A.; Tarakji, Bassel

    2016-01-01

    Objectives To explore the current literature of the survival of dental implants in irradiated head and neck cancer patients considering the role of implant location, bone augmentation, dose of radiation and timing of implant placement. Study Design Pubmed search was conducted to identify articles published between January 2000 and December 2014 and presenting data of dental implant survival with radiotherapy in head and neck cancer patients. Studies on animal subjects and craniofacial implant...

  14. Management of a patient suffering with Cherubism with dental implants.

    Science.gov (United States)

    Dewan, Karun; Bishop, Karl

    2011-06-01

    Cherubism is a rare non-neoplastic, fibro-osseous hereditary disorder characterized by bilateral expansion of the maxilla and mandible producing a characteristic facial appearance. It can affect the facial and dental growth of the individual and often results in gross aesthetic and functional deficiencies. The teeth may also be displaced or submerged and these problems can often compromise successful restorative rehabilitation. This paper describes the restorative management of an adult patient with Cherubism involving a fixed implant retained mandibular restoration. The care utilized 3D planning software and implant insertion guides to facilitate an early loading protocol and the use of optimum bone quality/volume areas.

  15. Noninvasive method for retrieval of broken dental implant abutment screw

    Directory of Open Access Journals (Sweden)

    Jagadish Reddy Gooty

    2014-01-01

    Full Text Available Dental implants made of titanium for replacement of missing teeth are widely used because of ease of technical procedure and high success rate, but are not free of complications and may fail. Fracturing of the prosthetic screw continues to be a problem in restorative practice and great challenge to remove the fractured screw conservatively. This case report describes and demonstrates the technique of using an ultrasonic scaler in the removal of the fracture screw fragment as a noninvasive method without damaging the hex of implants.

  16. Oral rehabilitation of segmental mandibulectomy patient with osseointegrated dental implant

    Directory of Open Access Journals (Sweden)

    Archana Singh

    2014-01-01

    Full Text Available Surgical management of oral cancer lesions results in explicit aesthetic and functional disfigurement, including facial deformity, loss of hard and soft tissue, impaired speech, swallowing and mastication, which modify the patient′s self-image and quality-of-life. Recent advances in head and neck reconstruction techniques and dental implant based prosthetic rehabilitation may significantly improve the quality-of-life and self-esteem for such post-surgery patients. This clinical report describes rehabilitation of oral cancer patient having segmental mandibulectomy with implant-supported fixed partial denture.

  17. A new concept for implant-borne dental rehabilitation; how to overcome the biological weak-spot of conventional dental implants?

    Science.gov (United States)

    Gellrich, Nils-Claudius; Rahlf, Björn; Zimmerer, Rüdiger; Pott, Philipp-Cornelius; Rana, Majeed

    2017-09-29

    Every endosseous dental implant is dependent on an adequate amount and quality of peri-implant hard and soft tissues and their fully functional interaction. The dental implant could fail in cases of insufficient bone and soft tissues or due to a violation of the soft to hard tissues to implant shoulder interface with arising of a secondary bone loss. To overcome this biological weak-spot, we designed a new implant that allows for multi vector endosseous anchorage around the individual underlying bone, which has to be scanned by computed tomography (CT) or Cone beam CT (CBCT) technique to allow for planning the implant. We developed a workflow to digitally engineer this customized implant made up of two planning steps. First, the implant posts are designed by prosthodontic-driven backward planning, and a wireframe-style framework is designed on the individual bony surface of the recipient site. Next, the two pieces are digitally fused and manufactured as a single piece implant using the SLM technique (selective laser melting) and titanium-alloy-powder. Preoperative FEM-stress-test of the individual implant is possible before it is inserted sterile in an out-patient procedure. Unlike any other historical or current dental implant protocol, our newly developed "individual patient solutions dental" follows the principle of a fully functional and rigid osteosynthesis technology and offers a quick solution for an implant-borne dental rehabilitation in difficult conditions of soft and hard tissues.

  18. The bone-implant interface of dental implants in humans on the atomic scale.

    Science.gov (United States)

    Sundell, Gustav; Dahlin, Christer; Andersson, Martin; Thuvander, Mattias

    2017-01-15

    Osseointegration of dental implants occurs on a hierarchy of length scales down to the atomic level. A deeper understanding of the complex processes that take place at the surface of an implant on the smallest scale is of interest for the development of improved biomaterials. To date, transmission electron microscopy (TEM) has been utilized for examination of the bone-implant interface, providing details on the nanometer level. In this study we show that TEM imaging can be complemented with atom probe tomography (APT) to reveal the chemical composition of a Ti-based dental implant in a human jaw on the atomic level of resolution. As the atom probe technique has equal sensitivity for all elements, it allows for 3 dimensional characterizations of osseointegrated interfaces with unprecedented resolution. The APT reconstructions reveal a Ca-enriched zone in the immediate vicinity of the implant surface. A surface oxide of some 5nm thickness was measured on the titanium implant, with a sub-stoichiometric composition with respect to TiO2. Minor incorporation of Ca into the thin oxide film was also evident. We conclude that the APT technique is capable of revealing chemical information from the bone-implant interface in 3D with unprecedented resolution, thus providing important insights into the mechanisms behind osseointegration. Osseointegration of dental implants occurs on a hierarchy of length scales down to the atomic level. A deeper understanding of the complex processes that take place at the surface of an implant on the smallest scale is of interest for the development of improved biomaterials. To date, transmission electron microscopy (TEM) has been utilized for examination of the bone-implant interface, providing details on the nanometer level. In this study we show that TEM imaging can be complemented with atom probe tomography (APT) to reveal the chemical composition of a Ti-based dental implant in a human jaw on the atomic level of resolution. Correlative

  19. Surface characterization of titanium based dental implants; Caracterizacao de implantes odontologicos a base de titanio

    Energy Technology Data Exchange (ETDEWEB)

    Castilho, Guilherme Augusto Alcaraz

    2006-07-01

    Dental implantology uses metallic devices made of commercially pure titanium in order to replace lost teeth. Titanium presents favorable characteristics as bio material and modern implants are capable of integrate, witch is the union between bone and implant without fibrous tissue development. Three of the major Brazilian implant manufacturers were chosen to join the study. A foreign manufacturer participated as standard. The manufacturers had three specimens of each implant with two different surface finishing, as machined and porous, submitted to analysis. Surface chemical composition and implant morphology were analyzed by X-ray photoelectron spectroscopy (XP S), scanning electron microscopy (SEM) and microprobe. Implant surface is mainly composed of titanium, oxygen and carbon. Few contaminants commonly present on implant surface were found on samples. Superficial oxide layer is basically composed of titanium dioxide (TiO{sub 2}), another oxides as Ti O and Ti{sub 2}O{sub 3} were also found in small amount. Carbon on implant surface was attributed to manufacturing process. Nitrogen, Phosphorous and Silicon appeared in smaller concentration on surface. There was no surface discrepancy among foreign and Brazilian made implants. SEM images were made on different magnification, 35 X to 3500 X, and showed similarity among as machined implants. Porous surface finishing implants presented distinct morphology. This result was attributed to differences on manufacturing process. Implant bioactivity was accessed through immersion on simulated body solution (SBF) in order to verify formation of an hydroxyapatite (HA) layer on surface. Samples were divided on three groups according to immersion time: G1 (7 days), G2 (14 days), G3 (21 days), and deep in SBF solution at 37 deg C. After being removed from solution, XPS analyses were made and then implants have been submitted to microprobe analysis. XPS showed some components of SBF solution on sample surface but microprobe

  20. Complications of dental implants: identification, frequency, and associated risk factors.

    Science.gov (United States)

    McDermott, Nancy E; Chuang, Sung-Kiang; Woo, Valerie V; Dodson, Thomas B

    2003-01-01

    This study sought to identify the types, frequencies, and risk factors associated with complications following placement of dental implants. It was hypothesized that one or more factors could be identified that are associated with an increased risk for complications and may be modified by the clinician to enhance outcome. A retrospective cohort study design was used that included patients who received Bicon implants (Bicon, Boston, MA) between 1992 and 2000. Predictor variables were grouped into demographic, medical history, implant-specific, anatomic, prosthetic, and reconstructive categories. Complications were grouped into inflammatory, prosthetic, operative, and major or minor categories. Cox proportional hazards regression models were developed to identify risk factors for complications. The sample was composed of 677 patients. The overall frequency of implant complications was 13.9% (10.2% inflammatory, 2.7% prosthetic, 1.0% operative), of which 53% were minor. The multivariate Cox model revealed that smoking, use of 1-stage implants, and reconstructive procedures were statistically associated with an increased risk for overall complications (P < or = .05). The median duration of follow-up was 13.1 months (range 0 to 85.6 months). A lower frequency of complications was found compared to mean frequencies calculated from past reports. Investigations examining the influence of smoking and reconstructive procedures on implant complications are recommended. Of the 3 factors associated with an increased risk for complications, tobacco use and implant staging may be modified by the clinician to enhance outcome.

  1. Intraoral radiographs texture analysis for dental implant planning.

    Science.gov (United States)

    Mundim, Mayara B V; Dias, Danilo R; Costa, Ronaldo M; Leles, Cláudio R; Azevedo-Marques, Paulo M; Ribeiro-Rotta, Rejane F

    2016-11-01

    Computer vision extracts features or attributes from images improving diagnosis accuracy and aiding in clinical decisions. This study aims to investigate the feasibility of using texture analysis of periapical radiograph images as a tool for dental implant treatment planning. Periapical radiograph images of 127 jawbone sites were obtained before and after implant placement. From the superimposition of the pre- and post-implant images, four regions of interest (ROI) were delineated on the pre-implant images for each implant site: mesial, distal and apical peri-implant areas and a central area. Each ROI was analysed using Matlab® software and seven image attributes were extracted: mean grey level (MGL), standard deviation of grey levels (SDGL), coefficient of variation (CV), entropy (En), contrast, correlation (Cor) and angular second moment (ASM). Images were grouped by bone types-Lekholm and Zarb classification (1,2,3,4). Peak insertion torque (PIT) and resonance frequency analysis (RFA) were recorded during implant placement. Differences among groups were tested for each image attribute. Agreement between measurements of the peri-implant ROIs and overall ROI (peri-implant + central area) was tested, as well as the association between primary stability measures (PIT and RFA) and texture attributes. Differences among bone type groups were found for MGL (p = 0.035), SDGL (p = 0.024), CV (p  0.93), except for ASM (ρ = 0.62). Texture attributes were significantly associated with the implant stability measures. Texture analysis of periapical radiographs may be a reliable non-invasive quantitative method for the assessment of jawbone and prediction of implant stability, with potential clinical applications. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  2. Fractographic analysis of fractured dental implant components

    OpenAIRE

    Chang, Chih-Ling; Lu, Hsien-Kun; Ou, Keng-Liang; Su, Peng-Yu; Chen, Chung-Ming

    2013-01-01

    Background/purpose: This study investigated in seven patients the main causes of accidental fractures of various implant components. Materials and methods: We used a scanning electron microscope and transmission electron microscope to observe the fracture interfaces of four fixtures, six abutment screws, and nine gold screws retrieved from patients with prosthetic problems. Results: In all fixtures and some abutment screws, parafunctional force and a cantilever design ultimately resulte...

  3. Biomechanical determinants of the stability of dental implants: influence of the bone-implant interface properties.

    Science.gov (United States)

    Mathieu, Vincent; Vayron, Romain; Richard, Gilles; Lambert, Grégory; Naili, Salah; Meningaud, Jean-Paul; Haiat, Guillaume

    2014-01-03

    Dental implants are now widely used for the replacement of missing teeth in fully or partially edentulous patients and for cranial reconstructions. However, risks of failure, which may have dramatic consequences, are still experienced and remain difficult to anticipate. The stability of biomaterials inserted in bone tissue depends on multiscale phenomena of biomechanical (bone-implant interlocking) and of biological (mechanotransduction) natures. The objective of this review is to provide an overview of the biomechanical behavior of the bone-dental implant interface as a function of its environment by considering in silico, ex vivo and in vivo studies including animal models as well as clinical studies. The biomechanical determinants of osseointegration phenomena are related to bone remodeling in the vicinity of the implants (adaptation of the bone structure to accommodate the presence of a biomaterial). Aspects related to the description of the interface and to its space-time multiscale nature will first be reviewed. Then, the various approaches used in the literature to measure implant stability and the bone-implant interface properties in vitro and in vivo will be described. Quantitative ultrasound methods are promising because they are cheap, non invasive and because of their lower spatial resolution around the implant compared to other biomechanical approaches. © 2013 Published by Elsevier Ltd.

  4. Can dental implants osseointegrate in oral cancer patients?

    Science.gov (United States)

    Jokstad, Asbjorn

    2011-01-01

    Medline from 1986 to September 2010. Hand-searching of unspecified journals over an unspecified period of time. Clinical studies, though not confined to a particular type (e.g. randomised controlled trial), involving patients having undergone radio- and chemotherapy following oral cancer surgery. Only those articles published in English were included. No details are given of the number of reviewers, of any quality assessment of the included papers, nor of how they proposed to synthesise the data or conduct subgroup and sensitivity analysis. A narrative report of findings from 21 included studies. No report is made of the types of study, nor their quality. In 16 studies that examined whether dental implants osseointegrated following radiation, between 68% and 100% did (no confidence intervals reported). Studies ranged in duration from 2 months to 13 years. Dental implants can osseointegrate and remain functionally stable in patients having undergone oral cancer therapy.

  5. Oral squamous cell carcinoma arising around osseointegrated dental implants.

    Science.gov (United States)

    Javed, Fawad; Al-Askar, Mansour; Qayyum, Faisal; Wang, Hom-Lay; Al-Hezaimi, Khalid

    2012-08-01

    This literature review investigates the occurrence of oral squamous cell carcinoma (OSCC) around osseointegrated dental implants (DI). Databases were searched from 1989 up to and including November 2011. The eligibility criteria were as follows: (1) original studies, (2) clinical studies and case reports, (3) reference lists of the relevant original and review articles, (4) intervention: occurrence of OSSC around osseointegrated DI, and (5) articles published only in English language. Fourteen studies were included. In nine studies, the dental implant patients with diagnosed OSCC had previously been exposed to cancer. In five studies, the patients presented with a history of habitual tobacco smoking and alcohol consumption. OSCC is more likely to arise around osseointegrated DI in patients with a previous history of cancer. However, the role of other factors including tobacco and alcohol usage cannot be disregarded.

  6. Analyzing dental occlusion for implants: Tekscan's TScan III.

    Science.gov (United States)

    Garg, Arun K

    2007-09-01

    Though no single, specific occlusal pattern has been developed that is ideal for oral implantology, research suggests some general criteria for deciding on a particular occlusal pattern that will help reduce cuspal interferences and lessen horizontal or lateral forces on the fixtures. Anticipated occlusal and chewing forces need to be taken under consideration for any implant-supported prosthesis. In addition, opposing dentition, as well as potential parafunctional mandibular movements, should be noted. Tekscan's T-Scan Occlusal Analysis System can help clinicians meet the needs of their patients for reliable measurements of occlusal biting forces. The T-Scan III System is Tekscan's most recent attempt to help dental clinicians obtain consistent and useful occlusal data for the placement, analysis, and repair of dental implants.

  7. Clinical Outcomes of Zirconia Dental Implants: A Systematic Review

    Science.gov (United States)

    Pieralli, S; Kohal, R J; Jung, R E; Vach, K; Spies, B C

    2017-01-01

    To determine the survival rate and marginal bone loss (MBL) of zirconia dental implants restored with single crowns or fixed dental prostheses. An electronic search was conducted up to November 2015 (without any restriction regarding the publication time) through the databases MEDLINE (PubMed), Cochrane Library, and EMBASE to identify randomized controlled clinical trials and prospective clinical trials including >15 patients. Primary outcomes were survival rate and MBL. Furthermore, the influence of several covariates on MBL was evaluated. Qualitative assessment and statistical analyses were performed. This review was conducted according to preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines for systematic reviews. With the applied search strategy, 4,196 titles could be identified. After a screening procedure, 2 randomized controlled clinical trials and 7 prospective clinical trials remained for analyses. In these trials, a total of 326 patients received 398 implants. The follow-up ranged from 12 to 60 mo. Implant loss was mostly reported within the first year, especially within the healing period. Thereafter, nearly constant survival curves could be observed. Therefore, separate meta-analyses were performed for the first and subsequent years, resulting in an implant survival rate of 95.6% (95% confidence interval: 93.3% to 97.9%) after 12 mo and, thereafter, an expected decrease of 0.05% per year (0.25% after 5 y). Additionally, a meta-analysis was conducted for the mean MBL after 12 mo, resulting in 0.79 mm (95% confidence interval: 0.73 to 0.86 mm). Implant bulk material and design, restoration type, and the application of minor augmentation procedures during surgery, as well as the modes of temporization and loading, had no statistically significant influence on MBL. The short-term cumulative survival rates and the MBL of zirconia implants in the presented systematic review are promising. However, additional data are still

  8. Evaluating the Effectiveness of Biomaterial Removal from Dental Implant Drills

    Science.gov (United States)

    2016-06-13

    2 ABSTRACT Multiple studies question the efficacy of cleaning and sterilizing protocols for multi-use dental burs and endodontic files. The...US Army, among other institutions, implemented a single use policy for burs and endodontic files; included in this policy are implant osteotomy...vitro study examined 160 Biomet 3iTM drills of two configurations imaged with SEM at 30X magnification . Eighty drills were used to conduct osteotomies

  9. Oral rehabilitation with dental implants in irradiated patients: a meta-analysis on implant survival.

    Science.gov (United States)

    Schiegnitz, E; Al-Nawas, B; Kämmerer, P W; Grötz, K A

    2014-04-01

    The aim of this comprehensive literature review is to provide recommendations and guidelines for dental implant therapy in patients with a history of radiation in the head and neck region. For the first time, a meta-analysis comparing the implant survival in irradiated and non-irradiated patients was performed. An extensive electronic search in the electronic databases of the National Library of Medicine was conducted for articles published between January 1990 and January 2013 to identify literature presenting survival data on the topic of dental implants in patients receiving radiotherapy for head and neck cancer. Review and meta-analysis were performed according to Preferred Reporting Items for Systematic Review and Meta-Analyses statement. For meta-analysis, only studies with a mean follow-up of at least 5 years were included. After screening 529 abstracts from the electronic database, we included 31 studies in qualitative and 8 in quantitative synthesis. The mean implant survival rate of all examined studies was 83 % (range, 34-100 %). Meta-analysis of the current literature (2007-2013) revealed no statistically significant difference in implant survival between non-irradiated native bone and irradiated native bone (odds ratio [OR], 1.44; confidence interval [CI], 0.67-3.1). In contrast, meta-analysis of the literature of the years 1990-2006 showed a significant difference in implant survival between non-irradiated and irradiated patients ([OR], 2.12; [CI], 1.69-2.65) with a higher implant survival in the non-irradiated bone. Meta-analysis of the implant survival regarding bone origin indicated a statistically significant higher implant survival in the irradiated native bone compared to the irradiated grafted bone ([OR], 1.82; [CI], 1.14-2.90). Within the limits of this meta-analytic approach to the literature, this study describes for the first time a comparable implant survival in non-irradiated and irradiated native bone in the current literature. Grafted

  10. Dental implant surfaces after insertion in bone: an in vitro study in four commercial implant systems.

    Science.gov (United States)

    Deppe, Herbert; Wolff, Carolina; Bauer, Florian; Ruthenberg, Ricarda; Sculean, Anton; Mücke, Thomas

    2017-10-24

    Primary healing of dental implants is influenced by their surface morphology. However, little is known about any alterations in morphology during their insertion. Therefore, the aim of this study was to evaluate the surface morphology of four different implant systems, following their insertion in porcine jaw bones. Four fresh porcine mandible specimens were used. Six new implants of four systems (Ankylos® 4.5 × 14 mm, Frialit Synchro® 4.5 × 15 mm, NobelReplace ® Tapered Groovy RP 4.3 × 13 mm, Straumann SLA® Bone Level 3.3 × 14 mm) were inserted, whereas one implant of each system served as a control. After their removal, implants were cleaned in an ultrasonic bath. All 28 implants were examined quantitatively by 3D confocal microscopy for surface characteristics. In the evaluated zones, implants of the Ankylos, Frialit, and Straumann systems showed mostly a reduction of the mean surface roughness Sa, the maximal surface roughness Sz, and the developed surface area ratio Sdr; Nobel implants showed an increase in these parameters. With respect to all three parameters Sa, Sz, and Sdr, statistical analysis revealed that differences between the four systems were highly significant in the apical region of implants. Controls showed no morphologic alterations. The insertion process had an impact on the surface of all four implant systems. Anodized implant surface modification seems to result in more alterations compared with subtractive surface modifications. Therefore, surgical planning should take into consideration the choice of surface treatment because the characteristics of the implants may be modified during the installation process. The given information is of value for daily implantation practice and the course of osseointegration.

  11. Titanium Nitride and Nitrogen Ion Implanted Coated Dental Materials

    Directory of Open Access Journals (Sweden)

    David W. Berzins

    2012-07-01

    Full Text Available Titanium nitride and/or nitrogen ion implanted coated dental materials have been investigated since the mid-1980s and considered in various applications in dentistry such as implants, abutments, orthodontic wires, endodontic files, periodontal/oral hygiene instruments, and casting alloys for fixed restorations. Multiple methodologies have been employed to create the coatings, but detailed structural analysis of the coatings is generally lacking in the dental literature. Depending on application, the purpose of the coating is to provide increased surface hardness, abrasion/wear resistance, esthetics, and corrosion resistance, lower friction, as well as greater beneficial interaction with adjacent biological and material substrates. While many studies have reported on the achievement of these properties, a consensus is not always clear. Additionally, few studies have been conducted to assess the efficacy of the coatings in a clinical setting. Overall, titanium nitride and/or nitrogen ion implanted coated dental materials potentially offer advantages over uncoated counterparts, but more investigation is needed to document the structure of the coatings and their clinical effectiveness.

  12. Comprehensive rehabilitation using dental implants in generalized aggressive periodontitis

    Directory of Open Access Journals (Sweden)

    Asha Ramesh

    2017-01-01

    Full Text Available Generalized aggressive periodontitis (GAP is a debilitating form of the disease and it results in deteriorating effects on the esthetic and functional aspects of the oral cavity. This case report describes the comprehensive rehabilitation of GAP patient using dental implants. The treatment planning involved thorough scaling and root planning (SRP with oral hygiene instructions. The patient was motivated to adhere to a strict oral hygiene regimen following which periodontal flap surgery employing guided tissue regeneration and bone grafts was performed. Bacterial culture for anaerobic microorganisms was done using a gas pack pre- and postperiodontal treatment to confirm the effectiveness of the periodontal treatment regimen and also to proceed with dental implant placement. The rigorous maintenance program ensured the stability of the periodontium following which immediate placement of dental implants in the maxillary and mandibular anterior region was done. The fixed metal-ceramic prosthesis was fabricated in a step-by-step process and the patient was recalled on a periodic basis over a 3-year follow-up duration. This case is a testimonial to the postperiodontal treatment long-term stability with excellent patient cooperation and strict maintenance protocol.

  13. Pansinusitis y afectación intracraneal por implante dental Pansinusitis and intracranial impact of a dental implant

    OpenAIRE

    Josep Rubio-Palau; Jordi García-Linares; Javier Gutiérrez-Santamaría; Juan Antonio Hueto-Madrid; Mitchel Chávez-Gatty; Eduard Ferrés-Padró

    2012-01-01

    Las sinusitis odontógenas son una patología relativamente frecuente causada por infecciones dentales, quistes periapicales así como tras procedimientos bucodentales como una endodoncia, una elevación sinusal o la colocación de un implante. A continuación se presenta un caso extremo de una pansinusitis derecha con fistulización a espacio epidural causada por un implante osteointegrado. Ante la sospecha de una sinusitis maxilar de origen odontogénico se debe iniciar rápidamente un tratamiento a...

  14. Associated lesions of peri-implant mucosa in immediate versus delayed loading of dental implants.

    Science.gov (United States)

    Iliescu, Alexandru Andrei; Zurac, Sabina Andrada; Nicolae, Vasile; Iliescu, Mihaela Georgiana; Perlea, Paula

    2017-01-01

    Currently, immediate loading of dental implants is very attractive as a standard protocol for prosthetic restorations in edentulous patients. The aim of this study is to find out the intimate peri-implant mucosa response depending on timing of implant loading, immediate or delayed. Fifty-one screw implants Alpha Bio (Alpha-Bio Tec, Israel) were inserted in 42 partially edentulous patients according to standardized surgical techniques. At six months of loading, samples of peri-implant mucosa were harvested from 27 immediate loaded, respectively 24 delayed loaded implants, and subjected to microscopic examination. Peri-implant mucosa in both loadings revealed a continuous and stable stratified squamous epithelium with moderate acanthosis and slight hyperkeratosis. Severe fibrosis and tendency to scar-like lesions were present mainly in immediate loading. Slight to moderate density of inflammatory chronic cell populations of non-uniform feature was common to both loading protocols. As compared to lymphocytes, higher scores of plasma cells were encountered in immediate loading. In immediate and delayed loading, the peri-implant mucosa as a new generated structure does not reveal different tissue responses. After six month of prosthetic loading, the healthy peri-implant mucosa is compatible with fibrosis and minor chronic inflammatory reactions.

  15. Effects of Dental Implant-abutment Interfaces on the Reliability of Implant Systems

    Directory of Open Access Journals (Sweden)

    Zhang Xiao

    2016-01-01

    Full Text Available In this paper, by analyzing the effects of two different kinds of implant-abutment connection interfaces under the same working condition on the mechanical and fatigue performances of the implant system as well as on the surrounding bones, we intend to study such effects on the reliability of the implants and provide a theoretical basis for the design and clinical application of dental implant systems. For the purpose, we adopt a 3-D modeling method to establish the model, and use FEA (finite element analysis to carry out static mechanic and fatigue analysis on the implant system and its surrounding bones; then we make the two implant systems, and carry out fatigue tests on a dynamic fatigue testing machine to verify the FEA results. After comparing the results from the two different systems, we find that the stress distribution and fatigue safety factor of the system which has deeper axial matching of the taper connection are better than those of the other system, that is to say, between the two major elements of a implant system, the axial length of the connecting taper and the size of the hexagon, the former has greater effects than the latter. When the axial matching is deeper, the stress distribution of the implant system will be better, the fatigue safety factor will be higher, and the implant system will be more reliable.

  16. Osseointegration of standard and mini dental implants: a histomorphometric comparison.

    Science.gov (United States)

    Dhaliwal, Jagjit S; Albuquerque, Rubens F; Murshed, Monzur; Feine, Jocelyne S

    2017-12-01

    Mini dental implants (MDIs) are becoming increasingly popular for rehabilitation of edentulous patients because of their several advantages. However, there is a lack of evidence on the osseointegration potential of the MDIs. The objective of the study was to histomorphometrically evaluate and compare bone apposition on the surface of MDIs and standard implants in a rabbit model. Nine New Zealand white rabbits were used for the study to meet statistical criteria for adequate power. Total 18 3M ™ ESPE ™ MDIs and 18 standard implants (Ankylos ® Friadent, Dentsply) were inserted randomly into the tibia of rabbits (four implants per rabbit); animals were sacrificed after a 6-week healing period. The specimens were retrieved en bloc and preserved in 10% formaldehyde solution. Specimens were prepared for embedding in a light cure acrylic resin (Technovit 9100). The most central sagittal histological sections (30-40 μm thick) were obtained using a Leica SP 1600 saw microtome. After staining, the Leica DM2000 microscope was used, the images were captured using Olympus DP72 camera and associated software. Bone implant contact (BIC) was measured using Infinity Analyze software. All implants were osseointegrated. Histologic measures show mineralized bone matrix in intimate contact with the implant surface in both groups. The median BIC was 57.5% (IQR 9.0) in the MDI group and 55.0% (IQR 4.5) in the control group (P > 0.05, Mann-Whitney test). There were no statistical differences in osseointegration at 6 weeks between MDIs and standard implants in rabbit tibias. Based on these results, it is concluded that osseointegration of MDIs is similar to that of standard implants.

  17. Numerical simulation of the remodelling process of trabecular architecture around dental implants.

    Science.gov (United States)

    Wang, Chao; Wang, Lizhen; Liu, Xiaoyu; Fan, Yubo

    2014-01-01

    Dental implants may alter the mechanical environment in the jawbone, thereby causing remodelling and adaptation of the surrounding trabecular bone tissues. To improve the efficacy of dental implant systems, it is necessary to consider the effect of bone remodelling on the performance of the prosthetic systems. In this study, finite element simulations were implemented to predict the evolution of microarchitecture around four implant systems using a previously developed model that combines both adaptive and microdamage-based mechano-sensory mechanisms in bone remodelling process. Changes in the trabecular architecture around dental implants were mainly focused. The simulation results indicate that the orientational and ladder-like architecture around the implants predicted herein is in good agreement with those observed in animal experiments and clinical observations. The proposed algorithms were shown to be effective in simulating the remodelling process of trabecular architecture around dental implant systems. In addition, the architectural features around four typical dental implant systems in alveolar bone were evaluated comparatively.

  18. Prevalence and risk factors for peri-implant diseases in Japanese adult dental patients

    National Research Council Canada - National Science Library

    Ogata, Yorimasa; Nakayama, Yohei; Tatsumi, Junichi; Kubota, Takehiko; Sato, Shuichi; Nishida, Tetsuya; Takeuchi, Yasuo; Onitsuka, Tokuya; Sakagami, Ryuji; Nozaki, Takenori; Murakami, Shinya; Matsubara, Naritoshi; Tanaka, Maki; Yoshino, Toshiaki; Ota, Junya; Nakagawa, Taneaki; Ishihara, Yuichi; Ito, Taichi; Saito, Atsushi; Yamaki, Keiko; Matsuzaki, Etsuko; Hidaka, Toshirou; Sasaki, Daisuke; Yaegashi, Takashi; Yasuda, Tadashi; Shibutani, Toshiaki; Noguchi, Kazuyuki; Araki, Hisao; Ikumi, Noriharu; Aoyama, Yukihiko; Kogai, Hideki; Nemoto, Kenji; Deguchi, Shinji; Takiguchi, Takashi; Yamamoto, Matsuo; Inokuchi, Keita; Ito, Takatoshi; Kado, Takashi; Furuichi, Yasushi; Kanazashi, Mikimoto; Gomi, Kazuhiro; Takagi, Yukie; Kubokawa, Keita; Yoshinari, Nobuo; Hasegawa, Yoshiaki; Hirose, Tetsushi; Sase, Toshinaga; Arita, Hirokazu; Kodama, Toshiro; Shin, Kitetsu; Izumi, Yuichi; Yoshie, Hiromasa

    We investigated the prevalences and risk factors for peri-implant diseases in Japanese adult dental patients attending a follow-up visit at dental hospitals or clinics as part of their maintenance program...

  19. Prevalence and risk factors for peri-implant diseases in Japanese adult dental patients

    National Research Council Canada - National Science Library

    Ogata, Yorimasa; Nakayama, Yohei; Tatsumi, Junichi; Kubota, Takehiko; Sato, Shuichi; Nishida, Tetsuya; Takeuchi, Yasuo; Onitsuka, Tokuya; Sakagami, Ryuji; Nozaki, Takenori; Murakami, Shinya; Matsubara, Naritoshi; Tanaka, Maki; Yoshino, Toshiaki; Ota, Junya; Nakagawa, Taneaki; Ishihara, Yuichi; Ito, Taichi; Saito, Atsushi; Yamaki, Keiko; Matsuzaki, Etsuko; Hidaka, Toshirou; Sasaki, Daisuke; Yaegashi, Takashi; Yasuda, Tadashi; Shibutani, Toshiaki; Noguchi, Kazuyuki; Araki, Hisao; Ikumi, Noriharu; Aoyama, Yukihiko; Kogai, Hideki; Nemoto, Kenji; Deguchi, Shinji; Takiguchi, Takashi; Yamamoto, Matsuo; Inokuchi, Keita; Ito, Takatoshi; Kado, Takashi; Furuichi, Yasushi; Kanazashi, Mikimoto; Gomi, Kazuhiro; Takagi, Yukie; Kubokawa, Keita; Yoshinari, Nobuo; Hasegawa, Yoshiaki; Hirose, Tetsushi; Sase, Toshinaga; Arita, Hirokazu; Kodama, Toshiro; Shin, Kitetsu; Izumi, Yuichi; Yoshie, Hiromasa

    2016-01-01

    We investigated the prevalences and risk factors for peri-implant diseases in Japanese adult dental patients attending a follow-up visit at dental hospitals or clinics as part of their maintenance program...

  20. Bacterial communities associated with apical periodontitis and dental implant failure

    Directory of Open Access Journals (Sweden)

    Simon Dingsdag

    2016-11-01

    Full Text Available Background: Previously, we demonstrated that bacteria reside in apparently healed alveolar bone, using culture and Sanger sequencing techniques. Bacteria in apparently healed alveolar bone may have a role in peri-implantitis and dental implant failure. Objective: To compare bacterial communities associated with apical periodontitis, those colonising a failed implant and alveolar bone with reference biofilm samples from healthy teeth. Methods and results: The study consisted of 196 samples collected from 40 patients undergoing routine dental implant insertion or rehabilitation. The bacterial 16S ribosomal DNA sequences were amplified. Samples yielding sufficient polymerase chain reaction product for further molecular analyses were subjected to terminal restriction fragment length polymorphism (T-RFLP; 31 samples and next generation DNA sequencing (454 GS FLX Titanium; 8 samples. T-RFLP analysis revealed that the bacterial communities in diseased tissues were more similar to each other (p<0.049 than those from the healthy reference samples. Next generation sequencing detected 13 bacterial phyla and 373 putative bacterial species, revealing an increased abundance of Gram-negative [Prevotella, Fusobacterium (p<0.004, Treponema, Veillonellaceae, TG5 (Synergistetes] bacteria and a decreased abundance of Gram-positive [(Actinomyces, Corynebacterium (p<0.008] bacteria in the diseased tissue samples (n=5 relative to reference supragingival healthy samples (n=3. Conclusion: Increased abundances of Prevotella, Fusobacterium and TG5 (Synergistetes were associated with apical periodontitis and a failed implant. A larger sample set is needed to confirm these trends and to better define the processes of bacterial pathogenesis in implant failure and apical periodontitis. The application of combined culture-based, microscopic and molecular technique-based approaches is suggested for future studies.

  1. Bacterial communities associated with apical periodontitis and dental implant failure

    Science.gov (United States)

    Dingsdag, Simon; Nelson, Stephen; Coleman, Nicholas V.

    2016-01-01

    Background Previously, we demonstrated that bacteria reside in apparently healed alveolar bone, using culture and Sanger sequencing techniques. Bacteria in apparently healed alveolar bone may have a role in peri-implantitis and dental implant failure. Objective To compare bacterial communities associated with apical periodontitis, those colonising a failed implant and alveolar bone with reference biofilm samples from healthy teeth. Methods and results The study consisted of 196 samples collected from 40 patients undergoing routine dental implant insertion or rehabilitation. The bacterial 16S ribosomal DNA sequences were amplified. Samples yielding sufficient polymerase chain reaction product for further molecular analyses were subjected to terminal restriction fragment length polymorphism (T-RFLP; 31 samples) and next generation DNA sequencing (454 GS FLX Titanium; 8 samples). T-RFLP analysis revealed that the bacterial communities in diseased tissues were more similar to each other (p<0.049) than those from the healthy reference samples. Next generation sequencing detected 13 bacterial phyla and 373 putative bacterial species, revealing an increased abundance of Gram-negative [Prevotella, Fusobacterium (p<0.004), Treponema, Veillonellaceae, TG5 (Synergistetes)] bacteria and a decreased abundance of Gram-positive [(Actinomyces, Corynebacterium (p<0.008)] bacteria in the diseased tissue samples (n=5) relative to reference supragingival healthy samples (n=3). Conclusion Increased abundances of Prevotella, Fusobacterium and TG5 (Synergistetes) were associated with apical periodontitis and a failed implant. A larger sample set is needed to confirm these trends and to better define the processes of bacterial pathogenesis in implant failure and apical periodontitis. The application of combined culture-based, microscopic and molecular technique-based approaches is suggested for future studies. PMID:27834171

  2. Evidence-based considerations for removable prosthodontic and dental implant occlusion: a literature review.

    Science.gov (United States)

    Taylor, Thomas D; Wiens, Jonathan; Carr, Alan

    2005-12-01

    The dental literature is filled with discussions of dental occlusion, occlusal schemes, philosophies, and methods to correct and restore the diseased, worn, or damaged occlusion. Traditionally, these discussions have been empirical in nature and not based on scientific evidence. Due to the empirical nature of the literature, the study of occlusion has been extremely complex and troublesome to both pre- and post-doctoral students. The introduction of osseointegrated implants has further complicated the situation. Dentists may apply the principles of occlusion for the natural dentition directly to implant-supported and retained restorations. Although this may be successful, this rationale may result in overly complex or simplified treatment protocols and outcomes. There is an emerging body of scientific literature related to dental implant therapy that may be useful in formulating treatment protocols and prosthesis designs for implant-supported restorations. This review focuses on some of the "classic" removable prosthodontic literature and the currently available scientific literature involving removable prosthodontic occlusion and dental implant occlusion. The authors reviewed the English peer-reviewed literature prior to 1996 in as comprehensive manner as possible, and material after 1996 was reviewed electronically using MEDLINE. Electronic searches of the literature were performed in MEDLINE using key words-animal studies, case series, clinical trials, cohort studies, complete denture occlusion, dental implant function, dental implant occlusion, dental implant occlusion research, dental implant functional loading, dental implants, dental occlusion, dental occlusion research, denture function, denture occlusion, dentures, implant function, implant functional loading, implant occlusion, occlusion, and removable partial denture occlusion-in various combinations to obtain potential references for review. A total of 5447 English language titles were obtained, many of

  3. Finite element analysis (FEA) of dental implant fixture for mechanical stability and rapid osseointegration

    Science.gov (United States)

    Tabassum, Shafia; Murtaza, Ahmar; Ali, Hasan; Uddin, Zia Mohy; Zehra, Syedah Sadaf

    2017-10-01

    For rapid osseointegration of dental implant fixtures, various surface treatments including plasma spraying, hydroxyapatite coating, acid-etching, and surface grooving are used. However undesirable effects such as chemical modifications, loss of mechanical properties, prolonged processing times and post production treatment steps are often associated with these techniques. The osseointegration rate of the dental implants can be promoted by increasing the surface area of the dental implant, thus increasing the bone cells - implant material contact and allow bone tissues to grow rapidly. Additive Manufacturing (AM) techniques can be used to fabricate dental implant fixtures with desirable surface area in a single step manufacturing process. AM allows the use of Computer Aided Designing (CAD) for customised rapid prototyping of components with precise control over geometry. In this study, the dental implant fixture that replaces the tooth root was designed on commercially available software COMSOL. Nickel - titanium alloy was selected as build materials for dental implant. The geometry of the dental fixture was varied by changing the interspacing distance (thread pitch) and number of threads to increase the total surface area. Three different microstructures were introduced on the surface of dental implant. The designed models were used to examine the effect of changing geometries on the total surface area. Finite Element Analysis (FEA) was performed to investigate the effect of changing geometries on the mechanical properties of the dental implant fixtures using stress analysis.

  4. Effect of surface contamination on osseointegration of dental implants surrounded by circumferential bone defects.

    LENUS (Irish Health Repository)

    Mohamed, Seif

    2010-05-01

    This study was designed to evaluate the effect of surface contamination on osseointegration of dental implants surrounded by a circumferential bone defect and to compare osseointegration around Osseotite with that around Nanotite implants.

  5. A study of the bone healing kinetics of plateau versus screw root design titanium dental implants.

    LENUS (Irish Health Repository)

    Leonard, Gary

    2009-03-01

    This study was designed to compare the bone healing process around plateau root from (PRF) and screw root from (SRF) titanium dental implants over the immediate 12 week healing period post implant placement.

  6. Pansinusitis y afectación intracraneal por implante dental Pansinusitis and intracranial impact of a dental implant

    Directory of Open Access Journals (Sweden)

    Josep Rubio-Palau

    2012-03-01

    Full Text Available Las sinusitis odontógenas son una patología relativamente frecuente causada por infecciones dentales, quistes periapicales así como tras procedimientos bucodentales como una endodoncia, una elevación sinusal o la colocación de un implante. A continuación se presenta un caso extremo de una pansinusitis derecha con fistulización a espacio epidural causada por un implante osteointegrado. Ante la sospecha de una sinusitis maxilar de origen odontogénico se debe iniciar rápidamente un tratamiento antibiótico correcto y un seguimiento estrecho ya que pueden tener consecuencias fatales como la pérdida de un ojo, abscesos cerebrales o incluso la muerte.Odontogenic sinusitis is a relatively common disease caused by dental infections, periapical cysts and oral procedures such as root canal, sinus lift or implant placement. We report an extreme case of a right pansinusitis with an epidural space fistula caused by osseointegrated implants. When maxillary sinusitis of odontogenic origin is suspected, we should quickly start effective antibiotic treatment and monitor the patient closely because odontogenic sinusitis can have serious consequences, such as the loss of an eye, brain abscess or death.

  7. Impact of dental implant insertion method on the peri-implant bone tissue: Experimental study

    Directory of Open Access Journals (Sweden)

    Stamatović Novak

    2013-01-01

    Full Text Available Background/Aim. The function of dental implants depends on their stability in bone tissue over extended period of time, i.e. on osseointegration. The process through which osseointegration is achieved depends on several factors, surgical insertion method being one of them. The aim of this study was to histopathologically compare the impact of the surgical method of implant insertion on the peri-implant bone tissue. Methods. The experiment was performed on 9 dogs. Eight weeks following the extraction of lower premolars implants were inserted using the one-stage method on the right mandibular side and two-stage method on the left side. Three months after implantation the animals were sacrificed. Three distinct regions of bone tissue were histopathologically analyzed, the results were scored and compared. Results. In the specimens of one-stage implants increased amount of collagen fibers was found in 5 specimens where tissue necrosis was also observed. Only moderate osteoblastic activity was found in 3 sections. The analysis of bone-to-implant contact region revealed statistically significantly better results regarding the amount of collagen tissue fibers for the implants inserted in the two-stage method (Wa = 59 105, α = 0.05. No necrosis and osteoblastic activity were observed. Conclusion. Better results were achieved by the two-stage method in bone-to-implant contact region regarding the amount of collagen tissue, while the results were identical regarding the osteoblastic activity and bone tissue necrosis. There was no difference between the methods in the bone-implant interface region. In the bone tissue adjacent to the implant the results were identical regarding the amount of collagen tissue, osteoblastic reaction and bone tissue necrosis, while better results were achieved by the two-stage method regarding the number of osteocytes.

  8. Comparative Evaluation of Osseointegration of Dental Endodontic Implants with and without Plasma- Sprayed Hydroxy apatite Coating

    OpenAIRE

    Moosavi SB.; Fathi MH. BS; MSC; Feizi Gh; Mortazavi V

    2001-01-01

    Bone osseointegration around dental implant can cause earlier stabilization and fixation of implant and reduce healing time. Hydroxyapatite coating can affect bone osseointegration and enhance its rates. The aim of this study was comparison of osseointegration between plasma sprayed hydroxyapatite coated and uncoated dental implants in cats. Four endodontic implants including, vitallium and two stainless steel with and without hydroxyapatite coating were prepared and placed in mandibular cani...

  9. Non-Destructive Analysis of Basic Surface Characteristics of Titanium Dental Implants Made by Miniature Machining

    Science.gov (United States)

    Babík, Ondrej; Czán, Andrej; Holubják, Jozef; Kameník, Roman; Pilc, Jozef

    2016-12-01

    One of the most best-known characteristic and important requirement of dental implant is made of biomaterials ability to create correct interaction between implant and human body. The most implemented material in manufacturing of dental implants is titanium of different grades of pureness. Since most of the implant surface is in direct contact with bone tissue, shape and integrity of said surface has great influence on the successful osseointegration. Among other characteristics of titanium that predetermine ideal biomaterial, it shows a high mechanical strength making precise machining miniature Increasingly difficult. The article is focused on evaluation of the resulting quality, integrity and characteristics of dental implants surface after machining.

  10. Soft tissue integration versus early biofilm formation on different dental implant materials

    NARCIS (Netherlands)

    Zhao, Bingran; van der Mei, Henderina; Subbiahdoss, Guruprakash; de Vries, Joop; Rustema-Abbing, Minie; Kuijer, Roel; Busscher, Henk J.; Qu-Ren, Yijin

    OBJECTIVE: Dental implants anchor in bone through a tight fit and osseo-integratable properties of the implant surfaces, while a protective soft tissue seal around the implants neck is needed to prevent bacterial destruction of the bone-implant interface. This tissue seal needs to form in the

  11. Immediate placement of dental implants in the esthetic zone : a systematic review and pooled analysis

    NARCIS (Netherlands)

    Slagter, Kirsten W; den Hartog, Laurens; Bakker, Nicolaas A; Vissink, Arjan; Meijer, Henny J A; Raghoebar, Gerry M

    Background: Research interest on immediate placement of dental implants has shifted from implant survival toward optimal preservation of soft and hard tissues. The aim of this study is to systematically assess the condition of implant survival, peri-implant hard and soft tissue changes, esthetic

  12. 30-Year Outcomes of Dental Implants Supporting Mandibular Fixed Dental Prostheses: A Retrospective Review of 4 Cases.

    Science.gov (United States)

    Turkyilmaz, Ilser; Tözüm, Tolga F

    2015-10-01

    The aim of this study was to present the 30-year outcomes of 28 implants supporting mandibular screw-retained fixed dental prostheses (FDPs). Dental charts of the 4 patients were carefully reviewed, and it was noticed that they received 28 implants and 5 screw-retained FDPs in 1983 and 1984. The chief concerns raised by these patients were poor retention of their complete dentures and decreased masticatory function at the time of treatment planning. Each dental care they received was recorded in the last 30 years. Implant survival, radiographic, and prosthodontic examinations were performed. No implants were lost after 30 years, giving the implant a survival rate of 100%. The average marginal bone level was 2.6 ± 0.5 mm at the last recall appointment. Of the 5 FDPs delivered, 1 needed replacement, indicating a prosthesis survival rate of 80%. The patients needed 21 repairs such as replacement of denture teeth/gold screws and hard relining, and 19 adjustments such as occlusal adjustments and acrylic resin contouring, over 30 years. This clinical report shows that machined-surface dental implants can successfully support screw-retained fixed dental prostheses for over 30 years, making dental implants an important dental treatment alternative compared to the traditional prosthetic treatment methods.

  13. Mechanical basis for bone retention around dental implants.

    Science.gov (United States)

    Alexander, Harold; Ricci, John L; Hrico, George J

    2009-02-01

    This study, analytically, through finite element analysis, predicts the minimization of crestal bone stress resulting from implant collar surface treatment. A tapered dental implant design with (LL) and without (control, C) laser microgrooving surface treatment are evaluated. The LL implant has the same tapered body design and thread surface treatment as the C implant, but has a 2-mm wide collar that has been laser micromachined with 8 and 12 microm grooves in the lower 1.5 mm to enhance tissue attachment. In vivo animal and human studies previously demonstrated decreased crestal bone loss with the LL implant. Axial and side loading with two different collar/bone interfaces (nonbonded and bonded, to simulate the C and LL surfaces, respectively) are considered. For 80 N side load, the maximum crestal bone distortional stress around C is 91.9 MPa, while the maximum crestal bone stress around LL, 22.6 MPa, is significantly lower. Finite element analysis suggests that stress overload may be responsible for the loss of crestal bone. Attaching bone to the collar with LL is predicted to diminish this effect, benefiting crestal bone retention. Copyright 2007 Wiley Periodicals, Inc.

  14. Implant Survival between Endo-osseous Dental Implants in Immediate Loading, Delayed Loading, and Basal Immediate Loading Dental Implants a 3-Year Follow-up.

    Science.gov (United States)

    Garg, Ritesh; Mishra, Neha; Alexander, Mohan; Gupta, Sunil Kumar

    2017-01-01

    With introduction of the term "ossteointegration of dental implant" by Branemark, advancement in implantology from 1957 to 2017 has come a long way with modification in implant type and in loading time. This study aims to evaluate the survival of endo-osseous immediate loading (IL) implant and basal IL implants in atrophic jaws with objective to compare implant survival in atrophic jaws for full mouth rehabilitation between endo-osseous IL versus endo-osseous delayed loading (DL) versus basal IL during 3-year follow-up. Fifty-two (34 endo-osseous and 18 basal) implants were placed in 4 patients requiring full mouth rehabilitation in atrophic jaws. Case 1: Endo-osseous DL implants in upper and lower arch, Case 2: Endo-osseous IL implants in upper and lower arch, Case 3: Basal IL implant in upper and lower arch, and Case 4: Endo-osseous DL in upper arch and basal IL implant in the lower arch. Intraoperative evaluation was done on the basis of pain (visual analog scale [VAS]), operative time, and initial primary implant stability. Postoperative evaluation was done on pain (VAS), infection, radiographically successful implant (orthopantomogram), and patient satisfaction (Grade 0-10). All cases showed satisfactory results but more amount of intra- and post-operative pain was felt with immediate basal implants. We believe that clinicians should comply with patient requests, and for this reason, we agree with some authors to use minimally invasive techniques and to avoid when possible esthetic or functional problems associated with the use of removable prosthesis after teeth extractions.

  15. Early dental plaque formation on toothbrushed titanium implant surfaces.

    Science.gov (United States)

    Amarante, Evandro Scligliano; Chambrone, Leandro; Lotufo, Roberto Fraga Moreira; Lima, Luiz A

    2008-10-01

    To evaluate the qualitative and quantitative differences on dental plaque formation on two different roughness titanium implant surfaces, i.e. machined and titanium plasma sprayed, as well as the amount of plaque removal by regular toothbrushing after 72-hour plaque accumulation. Eight systemically healthy subjects were recruited from the patient pool of a private dental practice. All patients underwent oral hygiene instruction and full mouth prophylaxis. Subsequently, maxillary casts from all patients were obtained and removable 0.7 mm-thick acetate stents without occlusal contact points were fabricated to support four titanium specimens of 4 x 2 x 2 mm divided into two groups (machined and plasma sprayed). Subjects were instructed to wear the stents for 72 hours, full time, removing them only during regular oral hygiene. Subsequently, the appliances were immediately repositioned and then the test side was brushed for 20 seconds. At the end of the 72-hour period, the stents were removed and prepared for microbiological analysis. Both machined and plasma sprayed brushed surfaces presented statistically significant fewer bacteria than non-brushed surfaces. Similarly, regarding surface roughness, machined surfaces presented a total number of bacteria significantly smaller than those presented by plasma sprayed surfaces (P dental plaque than polished surfaces. Both brushed surfaces presented less plaque accumulation, however, implant brushing was more effective on machined surfaces.

  16. The acute orbit: Differentiation of orbital cellulitis from subperiosteal abscess by computerized tomography

    Energy Technology Data Exchange (ETDEWEB)

    Handler, L.C.; Davey, I.C. (Groote Schuur Hospital, Cape Town (South Africa). Dept. of Neuroradiology Cape Town Univ. (South Africa)); Hill, J.C.; Lauryssen, C. (Groote Schuur Hospital, Cape Town (South Africa). Dept. of Ophthalmology Cape Town Univ. (South Africa))

    1991-02-01

    A series of 65 patients suffering from acute inflammatory disease of the orbit was studied by CT. Ethmoiditis was the cause in the vast majority; trauma and dental extraction played a lesser role in causation. Orbital cellulitis was diagnosed in 17 and subperiosteal abscess in the remaining 48. It was not possible to differentiate 33 pus-containing abscesses from the six with inflammatory masses (phlegmons). The satisfactory response to aggressive medical treatment in those patients with inflammatory masses that were not drained justifies a more conservative approach; surgical drainage being reserved for those with a deterioration in proptosis, ocular movements or vision. Six abscesses arose de novo, of which some were in the orbital fat rather than the subperiosteal space. (orig.).

  17. Risk Factors associated with Dental Implant Failure: A Study of 302 Implants placed in a Regional Center.

    Science.gov (United States)

    Oztel, Mehmet; Bilski, Wojciech M; Bilski, Arthur

    2017-08-01

    The aim of this research is to determine which risk factors are associated with dental implant failure and survival. Data pertaining to patients who received one or more dental implants from 2011 to 2013 in a regional center were retrospectively reviewed. This included a total of 302 Biomet 3i NanoTite Tapered Certain implants placed in 177 patients. All patients were followed up until the end of 2015. This study found an overall success rate of 95%. Statistically significant factors that were found to affect implant survival were implant length, surgical technique, and presence of diabetes mellitus DM. Age, gender, body mass index (BMI), implant site, smoking, and variable operators were not found to have any significant implant on implant survival. This study has demonstrated that the incidence of implant failure and its complications is affected by a number of important factors that clinicians should consider when assessing patients. A follow-up study with a larger sample size, longer follow-up period, and details of the type of prosthetic rehabilitation would be beneficial in producing more definitive conclusions which may improve clinical practice. Dental implants play an important role in modern-day dental rehabilitation. It is vital that clinicians understand the impact of variable risk factors on implant survival. This study will add to the growing literature on the subject.

  18. Microscopic Study of Surface Microtopographic Characteristics of Dental Implants

    Science.gov (United States)

    Sezin, M.; Croharé, L.; Ibañez, J.C.

    2016-01-01

    Objective: To determine and compare the micro topographic characteristics of dental implants submitted to different surface treatments, using scanning electron microscopy (SEM). Materials and Methods: Implants were divided into 7 groups of 3 specimens each, according to the surface treatment used: group 1: Osseotite, BIOMET 3i; group 2: SLA surface, Institut Straumann AG; group 3: Oxalife surface, Tree-Oss implant; group 4: B&W implant surface; group 5: Q-implant surface; group 6: ML implant surface; group 7: RBM surface, Rosterdent implant. The surfaces were examined under SEM (Carl Zeiss FE-SEM-SIGMA). Image Proplus software was used to determine the number and mean diameter of pores per area unit (mm). The data obtained were analyzed with the Mann-Whitney test. A confocal laser microscope (LEXT-OLS4100 Olympus) was used to conduct the comparative study of surface roughness (Ra). Data were analyzed using Tukey's HSD test. Results: The largest average pore diameter calculated in microns was found in group 5 (3.45 µm+/-1.91) while the smallest in group 7 (1.47µm+/-1.29). Significant differences were observed among each one of the groups studied (p<0.05). The largest number of pores/mm2 was found in group 2 (229343) and the smallest number in group 4 (10937). Group 2 showed significant differences regarding the other groups (p<0.05). The greatest roughness (Ra) was observed in group 2 (0.975µm+/-0.115) and the smallest in group 4 (0.304µm+/-0.063). Group 2 was significantly different from the other groups (p<0.05). Conclusion: The micro topography observed in the different groups presented dissimilar and specific features, depending on the chemical treatment used for the surfaces.. PMID:27335615

  19. Finite element analysis for dental implants subjected to thermal loads

    Directory of Open Access Journals (Sweden)

    Mohamad Reza Khalili

    2013-10-01

    Full Text Available   Background and Aims: Dental implants have been studied for replacement of missing teeth for many years. Productivity of implants is extremely related to the stability and resistance under applied loads and the minimum stress in jaw bone. The purpose of this study was to study numerically the 3D model of implant under thermal loads.   Materials and Methods: Bone and the ITI implant were modeled in “Solidworks” software. To obtain the exact model, the bone was assumed as a linear orthotropic material. The implant system, including implant, abutment, framework and crown were modeled and located in the bone. After importing the model in Abaqus software, the material properties and boundary conditions and loads were applied and after meshing, the model was analyzed. In this analysis, the loads were applied in two steps. In the first step, the mechanical load was applied as tightening torque to the abutment and the abutment was tightened in the implant with 35 N.cm torque. In the second step, the thermal load originated from drinking cold and hot water was applied as thermal flux on the ceramic crown surface in this model.   Results: Thermal analysis results showed that the thermal gradient in the bone was about 5.5 and 4.9 degrees of centigrade in the case of drinking cold and hot water respectively , although the maximum gradient of the whole system was reduced to 14 degrees, which occurred, in the crown by drinking cold water.   Conclusion Thermal stresses were so small and it was because of the low thermal gradient. Maximum stresses occurred in the abutment were due to the tension preloads which were originated from the tightening torque.

  20. Prevalence of Dental Implants and Evaluation of Peri-implant Bone Levels in Patients Presenting to a Dental School: A Radiographic Cross-Sectional 2-Year Study.

    Science.gov (United States)

    Alkan, Eylem Ayhan; Mau, Lian Ping; Schoolfield, John; Guest, Gary F; Cochran, David L

    To evaluate the number of patients with dental implants who present to a dental school clinic for screening and to report the prevalence of peri-implant bone level change detected on digital panoramic radiographs of those subjects. Patient screening files for 9,422 patients over a 2-year period were examined to see how many patients presented with dental implants. Those patients with at least one implant were further evaluated by measuring the bone level on the mesial and distal sides of the implant using the screening radiograph. A total of 187 patients (2%) had at least one implant. In regard to implants, 423 were examined and 146 (33%) had no detectable bone loss defined as bone level below the top of the implant. When thresholds of bone loss were evaluated, 109 implants (25%) had ≥ 2 mm of bone loss on either the mesial or distal sides or both. The median bone loss was 1.74 mm for the 277 implants with detectable bone loss and 2.97 mm for the 109 implants that had ≥ 2 mm bone loss. Interestingly, patients who were ≥ 70 years of age had significantly (P = .03) more bone loss in the mandible compared with the maxilla, while patients who were 60 to 69 years of age had significantly greater loss in the maxilla. These data reveal that for patients presenting to the dental school for a screening over a 2-year period, 1.98% had one or more dental implants. Furthermore, those patients with implants had a minimum amount of bone loss as measured from the top of the implant.

  1. A study on setting of the fatigue limit of temporary dental implants.

    Science.gov (United States)

    Kim, M H; Cho, E J; Lee, J W; Kim, E K; Yoo, S H; Park, C W

    2017-07-01

    A temporary dental implant is a medical device which is temporarily used to support a prosthesis such as an artificial tooth used for restoring patient's masticatory function during implant treatment. It is implanted in the oral cavity to substitute for the role of tooth. Due to the aging and westernization of current Korean society, the number of tooth extraction and implantation procedures is increasing, leading to an increase in the use and development of temporary dental implants. Because an implant performs a masticatory function in place of a tooth, a dynamic load is repeatedly put on the implant. Thus, the fatigue of implants is reported to be the most common causes of the fracture thereof. According to the investigation and analysis of the current domestic and international standards, the standard for fatigue of implant fixtures is not separately specified. Although a test method for measuring the fatigue is suggested in an ISO standard, it is a standard for permanent dental implants. Most of the test standards for Korean manufacturers and importers apply 250 N or more based on the guidance for the safety and performance evaluation of dental implants. Therefore, this study is intended to figure out the fatigue standard which can be applied to temporary dental implants when measuring the fatigue according to the test method suggested in the permanent dental implant standard. The results determined that suitable fatigue standards of temporary dental implants should be provided by each manufacturer rather than applying 250 N. This study will be useful for the establishment of the fatigue standards and fatigue test methods of the manufacturers and importers of temporary dental implants.

  2. Stress and strain distribution in three different mini dental implant designs using in implant retained overdenture: a finite element analysis study.

    Science.gov (United States)

    Aunmeungtong, W; Khongkhunthian, P; Rungsiyakull, P

    2016-01-01

    Finite Element Analysis (FEA) has been used for prediction of stress and strain between dental implant components and bone in the implant design process. Purpose of this study was to characterize and analyze stress and strain distribution occurring in bone and implants and to compare stress and strain of three different implant designs. Three different mini dental implant designs were included in this study: 1. a mini dental implant with an internal implant-abutment connection (MDIi); 2. a mini dental implant with an external implant-abutment connection (MDIe); 3. a single piece mini dental implant (MDIs). All implant designs were scanned using micro-CT scans. The imaging details of the implants were used to simulate models for FEA. An artificial bone volume of 9×9 mm in size was constructed and each implant was placed separately at the center of each bone model. All bone-implant models were simulatively loaded under an axial compressive force of 100 N and a 45-degree force of 100 N loading at the top of the implants using computer software to evaluate stress and strain distribution. There was no difference in stress or strain between the three implant designs. The stress and strain occurring in all three mini dental implant designs were mainly localized at the cortical bone around the bone-implant interface. Oblique 45° loading caused increased deformation, magnitude and distribution of stress and strain in all implant models. Within the limits of this study, the average stress and strain in bone and implant models with MDIi were similar to those with MDIe and MDIs. The oblique 45° load played an important role in dramatically increased average stress and strain in all bone-implant models. Mini dental implants with external or internal connections have similar stress distribution to single piece mini dental implants. In clinical situations, the three types of mini dental implant should exhibit the same behavior to chewing force.

  3. State of the Art of Short Dental Implants: A Systematic Review of the Literature

    DEFF Research Database (Denmark)

    Neldam, Camilla Albeck; Pinholt, Else Marie

    2012-01-01

    of this study was systematically to evaluate publications concerning short dental implants defined as an implant with a length of =8 mm installed in the maxilla or in the mandible with special reference to implant type, survival rate, location of implant site, and observation time. Materials and Methods......: A Medline and a hand search were conducted to identify studies concerning short dental implants of length =8 mm published between 1992 and October 2009. The articles included in this study report data on implant length =8 mm, implant surface, registered region of installment, observation time, single tooth......Background: Short implants (=8 mm) are manufactured for use in atrophic regions of the jaws. As implant length in many studies has been proven to play a major role in implant survival it is indicated to evaluate survival of short implants in the present literature. Purpose: The purpose...

  4. Development and applications of porous tantalum trabecular metal-enhanced titanium dental implants.

    Science.gov (United States)

    Bencharit, Sompop; Byrd, Warren C; Altarawneh, Sandra; Hosseini, Bashir; Leong, Austin; Reside, Glenn; Morelli, Thiago; Offenbacher, Steven

    2014-12-01

    Porous tantalum trabecular metal has recently been incorporated in titanium dental implants as a new form of implant surface enhancement. However, there is little information on the applications of this material in implant dentistry. The purpose of this article is to summarize the contemporary concept on the applications of porous tantalum trabecular metal in implant dentistry. We therefore review the current literature on the basic science and clinical uses of this material. Porous tantalum metal is used to improve the contact between osseous structure and dental implants and therefore presumably facilitate osseointegration. Success of porous tantalum metal in orthopedic implants led to the incorporation of porous tantalum metal in the design of root-form endosseous titanium implants. The porous tantalum three-dimensional enhancement of titanium dental implant surface allows for combining bone ongrowth together with bone ingrowth, or osseoincorporation. While little is known about the biological aspect of the porous tantalum in the oral cavity, there seems to be several possible advantages of this implant design. This article reviews the biological aspects of porous tantalum-enhanced titanium dental implants, in particular the effects of anatomical consideration and oral environment to implant designs. We propose here possible clinical situations and applications for this type of dental implant. Advantages and disadvantages of the implants as well as needed future clinical studies are discussed. © 2013 Wiley Periodicals, Inc.

  5. Intricate Assessment and Evaluation of Dental Implants in Patients on Bisphosphonate Therapy: A Retrospective Analysis.

    Science.gov (United States)

    Suvarna, Suraj; Dutt, Poonam; Misra, Animesh; Usmani, Nausheen; Singh, Abhishek; Suvarna, Chandini

    2016-05-01

    Osteonecrosis is one of the prevalent side effects of bisphosphonate (BP) therapy in oral cancer patients. In case of patients with various oncologic lesions, standard guidelines contraindicate the use of dental implants if the patients are on BP therapy. Literature also quotes studies that emphasize on the safety of dental implants in patients on BP therapy. Hence, this study aimed to retrospectively evaluate the clinical outcome of dental implants in patients on BP therapy. In this retrospective analysis, a total of 140 dental implants in 112 patients were included. Inclusion criteria included only those patients who were on or had history of BP therapy. Calculation of implant failure and survival rate was done. Ten cases of implant failure occurred, giving a success rate of above 92%, which was comparable to the results found in previous studies in patients who were not on BP therapy. No significant risk of implant failure is seen in patients on BP therapy compared with other patients.

  6. Preliminary fabrication and characterization of electron beam melted Ti-6Al-4V customized dental implant.

    Science.gov (United States)

    Ramakrishnaiah, Ravikumar; Al Kheraif, Abdulaziz Abdullah; Mohammad, Ashfaq; Divakar, Darshan Devang; Kotha, Sunil Babu; Celur, Sree Lalita; Hashem, Mohamed I; Vallittu, Pekka K; Rehman, Ihtesham Ur

    2017-05-01

    The current study was aimed to fabricate customized root form dental implant using additive manufacturing technique for the replacement of missing teeth. The root form dental implant was designed using Geomagic™ and Magics™, the designed implant was directly manufactured by layering technique using ARCAM A2™ electron beam melting system by employing medical grade Ti-6Al-4V alloy powder. Furthermore, the fabricated implant was characterized in terms of certain clinically important parameters such as surface microstructure, surface topography, chemical purity and internal porosity. Results confirmed that, fabrication of customized dental implants using additive rapid manufacturing technology offers an attractive method to produce extremely pure form of customized titanium dental implants, the rough and porous surface texture obtained is expected to provide better initial implant stabilization and superior osseointegration.

  7. Incidence and Determinants of Dental Implant Failure: A Review of Electronic Health Records in a U.S. Dental School.

    Science.gov (United States)

    Hickin, Matthew Parker; Shariff, Jaffer A; Jennette, Philip J; Finkelstein, Joseph; Papapanou, Panos N

    2017-10-01

    The aim of this study was to use electronic health care records (EHRs) to examine retrospectively the incidence of and attributes associated with dental implant failures necessitating implant removal in a large cohort of patients treated in the student clinics of a U.S. dental school over three and a half years. EHRs were searched for all patients who received dental implants between July 1, 2011, and December 31, 2014. Characteristics of patients and implants that were actively removed due to irrevocable failure of any etiology ("failure cohort") during this period were compared to those of all other patients who received dental implants during the same time frame ("reference cohort"). Differences in the frequency distribution of various characteristics between the failure and reference cohorts were compared. Of a total 6,129 implants placed in 2,127 patients during the study period, 179 implants (2.9%) in 120 patients (5.6%) were removed. In the multivariate analysis, presence of a removable (OR=2.86) or fixed temporary prosthesis (OR=3.71) was statistically significantly associated with increased risk for implant failure. In contrast, antibiotic coverage (pre- and post-surgery OR=0.16; post-surgery only OR=0.38) and implants of certain manufacturers were associated with lower risk of implant failure. In this sizeable cohort of patients receiving care in dental student clinics, the review of EHRs facilitated identification of multiple variables associated with implant failure resulting in removal; however, these findings do not suggest causative relationships. The adopted analytical approach can enhance quality assurance measures and may contribute to the identification of true risk factors for dental implant failure.

  8. Toward optimizing dental implant performance: Surface characterization of Ti and TiZr implant materials.

    OpenAIRE

    Murphy, Matthew; Walczak, Monika; Thomas, Andrew; Silikas, Nick; Berner, S.; Lindsay, Robert

    2017-01-01

    ObjectiveTargeting understanding enhanced osseointegration kinetics, the goal of this study was to characterize the surface morphology and composition of Ti and TiZr dental implant substrates subjected to one of two surface treatments developed by Straumann. These two treatments are typically known as SLA and SLActive, with the latter resulting in more rapid osseointegration.MethodsA range of techniques was applied to characterize four different substrate/surface treatment combinations (TiSLA...

  9. Antibiotic-modified hydrogel coatings on titanium dental implants.

    Science.gov (United States)

    Cometa, S; Mattioli-Belmonte, M; Cafagna, D; Iatta, R; Ceci, E; De Giglio, E

    2012-01-01

    Implant-associated infections represent an occasional but serious problem in dental and/or orthopaedic surgery. A possible solution to prevent the initial bacterial adhesion may be the coating of the implant surface with a thin layer of antibiotic-loaded biocompatible polymer. Hydrogels are one of the promising and versatile materials as antibiotic controlled release systems. In this work, antibiotic-modified poly(ethylene-glycol diacrylate) hydrogel coatings on titanium substrates were prepared by electrochemical polymerization and tested against methicillin resistant Staphylococcus aureus (ATCC 33591). Two different methods to load vancomycin and ceftriaxone were used. We show that the proposed titanium coatings displayed an interesting antibacterial activity, however, further studies on their effective cytotoxicity will furnish evidence of their real clinical efficacy.

  10. The cost of dental implants as compared to that of conventional strategies

    NARCIS (Netherlands)

    van der Wijk, P; Bouma, J; van Waas, MAJ; van Oort, RP; Rutten, FFH

    1998-01-01

    The effectiveness of dental implants is widely studied, especially in terms of their clinical outcomes. However, from the policymaker's point of view, variables other than safety and efficacy such as the costs and effectiveness of dental implants as compared to other treatment alternatives, are

  11. Development and Applications of Porous Tantalum Trabecular Metal Enhanced Titanium Dental Implants

    Science.gov (United States)

    Bencharit, Sompop; Byrd, Warren C.; Altarawneh, Sandra; Hosseini, Bashir; Leong, Austin; Reside, Glenn; Morelli, Thiago; Offenbacher, Steven

    2013-01-01

    Statement of Problem Porous tantalum trabecular metal has recently been incorporated in titanium dental implants as a new form of implant surface enhancement. However, there is little information on the applications of this material in implant dentistry. Methods We, therefore review the current literature on the basic science and clinical uses of this material. Results Porous tantalum metal is used to improve the contact between osseous structure and dental implants; and therefore presumably facilitate osseointegration. Success of porous tantalum metal in orthopedic implants led to the incorporation of porous tantalum metal in the design of root-from endosseous titanium implants. The porous tantalum three-dimensional enhancement of titanium dental implant surface allows for combining bone ongrowth together with bone ingrowth, or osseoincorporation. While little is known about the biological aspect of the porous tantalum in the oral cavity, there seems to be several possible advantages of this implant design. This article reviews the biological aspects of porous tantalum enhanced titanium dental implants, in particular the effects of anatomical consideration and oral environment to implant designs. Conclusions We propose here possible clinical situations and applications for this type of dental implant. Advantages and disadvantages of the implants as well as needed future clinical studies are discussed. PMID:23527899

  12. Dental Implants in an Aged Population: Evaluation of Periodontal Health, Bone Loss, Implant Survival, and Quality of Life.

    Science.gov (United States)

    Becker, William; Hujoel, Philippe; Becker, Burton E; Wohrle, Peter

    2016-06-01

    To evaluate aged partially and fully edentulous patients who received dental implants and were maintained over time. Further, to determine how the partially and edentulous ageing populations (65 and above) with dental implants maintain bone levels, proper oral hygiene, and perceive benefits of dental implants. Since 1995, patients receiving dental implants have been prospectively entered into an Access-based computerized program (Triton Tacking System). Patient demographics (age, sex), bone quality, quantity, implant location, and type of surgery have been continuously entered into the database. The database was queried for patients receiving implants (first stage) between 66 and 93 years of age. Thirty-one patients were within this age group. Twenty-five patients returned to the clinic for periodontal and dental implant evaluation. The Periodontal Index was used to evaluate selected teeth in terms of probing depth, bleeding on probing, plaque accumulation, and mobility. Using NIH Image J, radiographs taken at second stage and last examination were measured for changes in interproximal bone levels. Once identified, each patient anomalously filled out an abbreviated quality of health life form. Due to small sample size, descriptive statistics were used to compare clinical findings. Fifteen males ranging from 78 to 84 (mean age 84 years) years and 16 females from 66 to 93 (mean age 83 years) (age range 66-93) were contacted by phone or mail and asked to return to our office for a re-examination. For this group, the first dental implants were placed in 1996 (n = initial two implants) and continuously recorded through 2013 (n = last seven implants). Thirty-one patients received a total of 84 implants. Two patients were edentulous, and the remaining were partially edentulous. Four implants were lost. Between implant placement and 6- to 7-year interval, 13 patients with 40 implants had a cumulative survival rate of 94.6%. Of the original group (n = 33), three

  13. Need of implant dentistry at undergraduate dental curriculum in Indian dental colleges

    Directory of Open Access Journals (Sweden)

    Ramesh Chowdhary

    2011-01-01

    Full Text Available Edentulism is the major problem in the developing countries, and is widely spread in the current population, although the prevalence is declining and incidence of tooth loss is decreasing in the developed nations. The prevalence of edentulism in India varies from 60% to 69% of 25 years and above age group. It is obvious that the number of lost teeth increases with age leading to an increase in prevalence of partially edentulous patients. From a biological point of view, the replacement of a single missing tooth with an implant rather than a three-unit fixed partial denture, and the implant-supported complete denture has been proved more efficient in improving the mastication and maintaining the bone for a longer time and also more cost-effective treatment. Many dental schools throughout Europe and America have to a various extent introduced implant dentistry as part of the compulsory undergraduate curriculum. Thus, it becomes more essential to introduce implant dentistry at undergraduate level in Indian dental schools to manage the higher percentage of edentulism.

  14. Pulsed Nd:YAG laser treatment for failing dental implants due to peri-implantitis

    Science.gov (United States)

    Nicholson, Dawn; Blodgett, Kris; Braga, Charles; Finkbeiner, Larry; Fourrier, Jeanne; George, John; Gregg, Robert; Honigman, Allen; Houser, Bruce; Lamas, William; Lehrman, Neal; Linden, Eric; McCarthy, Delwin; McCawley, Tom; McCormick, Randy; Marcus, Ed; Noraian, Kirk; Rubelman, Peter; Salama, Maurice; Saunders, Steven; Seamons, Brandon; Thein, David; Toms, Michael; Vassos, George; Harris, David M.

    2014-02-01

    A large percentage of dental implants experience complications, most commonly, infection leading to peri-implantitis and peri-mucositis, inflammatory disease involving pathogen contamination. It presents with radiographic findings of crestal bone loss. At this time there appears to be no compelling evidence for an effective intervention. The LANAP protocol is a FDA cleared surgical protocol that produces new attachment and bone regeneration when applied to periodontally infected natural teeth. The LANAP protocol and laser dosimetry have been modified to treat ailing and failing implants. Twenty-one clinicians who have been trained to perform the LANAP protocol and the LAPIPTM protocol have volunteered 26 LAPIP case reports. The time from implant to intervention ranges from 3 months to 16 years. Post-LAPIP radiographs range from 2-48 months. Ten cases were excluded for technical reasons. All 16 remaining cases provide radiographic evidence of increase in crestal bone mass around the implant and, when reported, probe depth reductions. All treating clinicians report control of the infection, reversal of bone loss and rescue of the incumbent implant. Although the success/failure rate cannot be judged from these data, any successes in this area deserve reporting and further study.

  15. Dental Implants - Perceiving Patients' Satisfaction in Relation to Clinical and Electromyography Study on Implant Patients.

    Directory of Open Access Journals (Sweden)

    Mohammad Khursheed Alam

    Full Text Available The aim of this study is to evaluate the satisfaction of patients with posterior implants in relation to the clinical success criteria and surface electromyography (sEMG findings of the masseter and temporalis muscles. Total 42 subjects were investigated. Twenty one subjects with posterior dental implants were interviewed using a questionnaire and the clinical success criteria were determined based on The International Congress of Oral Implantologists. The myofunction of the masticatory muscles were assessed using sEMG (21 subjects and compared to the control group of subjects without implants (21 subjects. Out of 21 subjects, all were satisfied with the aesthetics of their implant. Twenty of them (95.2% were satisfied with its function and stability. As for clinical criteria, 100% (50 of the implants were successful with no pain, mobility or exudates. sEMG findings showed that patients have significantly lower (p<0.01 basal or resting median power frequency but with muscle burst. During chewing, control subjects showed faster chewing action. There was no difference in reaction and recovery time of clenching for both groups. In conclusion, the satisfaction of implant patients was high, and which was in relation to the successful clinical success criteria and sEMG findings.

  16. Longevity of dental implants in type IV bone: a systematic review.

    Science.gov (United States)

    Goiato, M C; dos Santos, D M; Santiago, J F; Moreno, A; Pellizzer, E P

    2014-09-01

    Bone quality and quantity are important factors with regard to the survival rate of dental implants. The aim of this study was to conduct a systematic review of dental implants inserted in low-density bone and to determine the survival rate of dental implants with surface treatments over time. A systematic review of the literature was undertaken by two independent individuals; the Medline/PubMed database was searched for the period July 1975 to March 2013. Relevant reports on bone quality and osseointegration of dental implants were selected. The search retrieved 1018 references, and after inclusion and exclusion criteria were applied, 19 studies were selected for review. A total of 3937 patients, who had received a total of 12,465 dental implants, were analyzed. The survival rates of dental implants according to the bone density were: type I, 97.6%; type II, 96.2%; type III, 96.5%; and type IV, 88.8%. The survival rate of treated surface implants inserted in low-density bone was higher (97.1%) than that of machined surface implants (91.6%). Surface-treated dental implants inserted in low-density bone have a high survival rate and may be indicated for oral rehabilitation. However, more randomized studies are required to better evaluate this issue. Copyright © 2014 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  17. What do patients expect from treatment with Dental Implants? Perceptions, expectations and misconceptions: a multicenter study.

    Science.gov (United States)

    Yao, Jie; Li, Ming; Tang, Hua; Wang, Peng-Lai; Zhao, Yu-Xiao; McGrath, Colman; Mattheos, Nikos

    2017-03-01

    While research in terms of patient-centered care in implant therapy is growing, few studies have investigated patients' initial perceptions prior to consultation with the implant dentist. The aim of this cross-sectional study was to capture patients' initial information level, perceptions, as well as expectations from the implant therapy. A 34-item questionnaire was developed to investigate patients' preoperative information, perceptions and expectations from treatment with Dental Implants. The study was conducted in three locations (Hong Kong, SiChuan and JiangSu) during 2014-2015 with 277 patients. The main information source about implant therapy was the dentist or hygienist for less than half of the patients (n = 113, 42%). About 62.8% of participants considered that they were in general informed about implants, but only 17.7% felt confident with the information they had. More than 30% of the sample appeared to maintain dangerous misperceptions about Dental Implants: "Dental Implants require less care than natural teeth"; "Treatment with Dental Implants is appropriate for all patients with missing teeth"; "Dental Implants last longer than natural teeth"; and "Treatments with Dental Implants have no risks or complications." Patients were divided when asked whether "Dental Implants are as functional as natural teeth" (agreement frequency = 52.7%). Expectations from treatment outcome were commonly high, while there was a significant correlation between the overall mean of perception scores and outcome expectation scores (r = 0.32, P dental team would need to diagnose and correct prior to initiating implant treatment. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  18. Rehabilitation of surgically relocated integrated dental implants with and without bone morphogenesis protein-2.

    Science.gov (United States)

    Tremblay, Gilbert

    2013-08-01

    In the following case report, three osseointegrated implants placed in a dysfunctional and nonaesthetic position were successfully relocated with innovative surgical techniques were followed by a comprehensive dental rehabilitation. The goal of this report is to communicate the surgical techniques used to successfully relocate dental implants rather than replace them. Two techniques were used for these implants relocation. One technique consisted of displacing the integrated implant with some similarity to the alveolar distraction osteogenesis but without using the distraction device. The second surgical technique involved the displacement of the 2 adjacent implants, similarly to the first approach, except that an osseoinductive molecule, recombinant human bone morphogenetic protein-2, was used for guided bone growth. It was possible to relocate dental implants within bone blocs and rehabilitate them to adopt new dental abilities by complying with bone regeneration parameters. However, advanced treatment planning with computerized tomography scans, parametric software, and stereolithography models as well as guided surgery and bone regeneration products were used.

  19. Effects of Untreated Periodontitis on Osseointegration of Dental Implants in a Beagle Dog Model.

    Science.gov (United States)

    Lee, Daehyun; Sohn, Byungjin; Kim, Kyoung Hwa; Kim, Sungtae; Koo, Ki-Tae; Kim, Tae-Il; Seol, Yang-Jo; Lee, Yong-Moo; Rhyu, In-Chul; Ku, Young

    2016-10-01

    There have been previous studies on the relationship between periodontitis and peri-implantitis, but limited information is available on how periodontitis affects osseointegration and wound healing of newly placed dental implants adjacent to natural teeth. The objective of the present experiment is to evaluate healing around dental implants adjacent to teeth with untreated experimental periodontitis. The study included six male beagle dogs. Scaling and plaque control procedures were performed on three dogs (control group). In the other three dogs (experimental group), retraction cords and ligature wires were placed subgingivally around all premolars and the first molars. Induced experimental periodontitis was confirmed after 3 months. Each control or experimental group was divided into two subgroups depending on the timing of implant placement (immediate/delayed). Twelve dental implants (two implants for each dog) were placed immediately, and the other 12 dental implants (two implants for each dog) were placed 2 months after extraction. The animals were sacrificed 2 months after implant placement. Histologic and histometric analyses were performed. Four implants (three from the immediate placement group and one from the delayed placement group) failed in the experimental group. There were significant differences in the percentage of bone-to-implant contact and marginal bone volume density between the control and experimental groups. Both parameters were significantly lower in the experimental group than in the control group (P implants is associated with a higher failure rate compared with delayed placement. Untreated experimental periodontitis was correlated with compromised osseointegration in the implants with delayed placement.

  20. Metastases and primary tumors around dental implants: A literature review and case report of peri-implant pulmonary metastasis.

    Science.gov (United States)

    Pfammatter, Chantal; Lindenmüller, Irène Hitz; Lugli, Alessandro; Filippi, Andreas; Kühl, Sebastian

    2012-01-01

    To perform a literature review on peri-implant metastases and primary malignoma and report a case of a pulmonary metastasis around dental implants of the anterior mandibular jaw that mimicked peri-implantitis. A literature search of publications from June 1980 to June 2011 in the PubMed/Medline database was performed to collect information about the type, incidence, and localization of malignant primary tumors and metastases around dental implants and to evaluate potential risk factors. A descriptive statistic was performed based on the collected data with regard to the type and/or origin of tumor, its localization, and the patient's age and sex. A total of 1,795 articles were considered for evaluation. Peri-implant metastases are described in three articles, and peri-implant primary tumors were found in 14 publications. Of all peri-implant metastases, no associated risk factors are mentioned. Those of the peri-implant tumors are alterations of the peri-implant mucosa (such as oral lichen planus, verrucous leukoplakia, and ulcer). Most of the primary tumors are squamous cell carcinoma. The mean age of the patients with peri-implant metastases was 68 years; for the peri-implant primary tumors, it was 71 years. Peri-implant metastases and primary tumors are rare. Every untypical or refractory reaction to the treatment of peri-implantitis is suspicious for malignancy as long as the contrary remains unproven.

  1. Decontamination methods using a dental water jet and dental floss for microthreaded implant fixtures in regenerative periimplantitis treatment.

    Science.gov (United States)

    Park, Shin-Young; Kim, Kyoung-Hwa; Shin, Seung-Yun; Koo, Ki-Tae; Lee, Yong-Moo; Chung, Chong-Pyoung; Seol, Yang-Jo

    2015-06-01

    This study evaluated decontamination methods using a dental water jet and dental floss on microthreaded implants for regenerative periimplantitis therapy. In 6 beagle dogs, experimental periimplantitis was induced, and decontamination procedures, including manual saline irrigation (control group), saline irrigation using a dental water jet (group 1) and saline irrigation using a dental water jet with dental flossing (group 2), were performed. After in situ decontamination procedures, some of the implant fixtures (n = 4 per group) were retrieved for analysis by SEM, whereas other fixtures (n = 4 per group) underwent regenerative therapy. After 3 months of healing, the animals were killed. The SEM examination indicated that decontamination of the implant surfaces was the most effective in group 2, with no changes in implant surface morphology. The histological examination also revealed that group 2 achieved significantly greater amounts of newly formed bone (6.75 ± 2.19 mm; P = 0.018), reosseointegration (1.88 ± 1.79 mm; P = 0.038), and vertical bone fill (26.69 ± 18.42%; P = 0.039). Decontamination using a dental water jet and dental floss on microthreaded implants showed positive mechanical debridement effects and positive bone regeneration effects.

  2. A retrospective study on related factors affecting the survival rate of dental implants

    Science.gov (United States)

    Kang, Jeong-Kyung; Lee, Ki; Lee, Yong-Sang; Park, Pil-Kyoo

    2011-01-01

    PURPOSE The aim of this retrospective study is to analyze the relationship between local factors and survival rate of dental implant which had been installed and restored in Seoul Veterans Hospital dental center for past 10 years. And when the relationship is found out, it could be helpful to predict the prognosis of dental implants. MATERIALS AND METHODS A retrospective study of patients receiving root-shaped screw-type dental implants placed from January 2000 to December 2009 was conducted. 6385 implants were placed in 3755 patients. The following data were collected from the dental records and radiographs: patient's age, gender, implant type and surface, length, diameter, location of implant placement, bone quality, prosthesis type. The correlations between these data and survival rate were analyzed. Statistical analysis was performed with the use of Kaplan-Meier analysis, Chi-square test and odds ratio. RESULTS In all, 6385 implants were placed in 3755 patients (3120 male, 635 female; mean age 65 ± 10.58 years). 108 implants failed and the cumulative survival rate was 96.33%. There were significant differences in age, implant type and surface, length, location and prosthesis type (P.05). CONCLUSION Related factors such as age, implant type, length, location and prosthesis type had a significant effect on the implant survival. PMID:22259704

  3. The Antibacterial Properties and Biocompatibility of Silver and Hydroxyapatite Nanoparticles Coating on Dental Implants

    OpenAIRE

    Hadi, Sanna Dara

    2014-01-01

    Introduction: Infection associated with dental implants is the most common cause of their failure. The aim of this study was to discover a new coating for dental implants that has a good antibacterial and antibiofilm activity against an early colonizer on implant surfaces: Streptococcus sanguinis. Furthermore, the coating should have a good biocompatibility with bone. Methods: Different coatings were prepared on the surface of titanium alloy (Ti4Al6V) discs. Silver, titanium dioxid...

  4. Patient satisfaction relating to implant treatment by undergraduate and postgraduate dental students--a pilot study.

    LENUS (Irish Health Repository)

    Harrison, P

    2009-08-01

    Recordings of patient satisfaction with provision of dental implant treatment are scarce. This study aimed to evaluate satisfaction amongst patients attending for provision of implant treatment by training undergraduate and postgraduate students at Dublin Dental School and Hospital (DDSH). A questionnaire was formulated and distributed to 100 individuals randomly selected from records of patients who had received implant treatment via student clinics in the previous 5 years. The response rate was 68%. Results showed a high overall level of satisfaction with treatment received.

  5. Short dental implants in the posterior maxilla: a review of the literature.

    Science.gov (United States)

    Esfahrood, Zeinab Rezaei; Ahmadi, Loghman; Karami, Elahe; Asghari, Shima

    2017-04-01

    The purpose of this study was to perform a literature review of short implants in the posterior maxilla and to assess the influence of different factors on implant success rate. A comprehensive search was conducted to retrieve articles published from 2004 to 2015 using short dental implants with lengths less than 10 mm in the posterior maxilla with at least one year of follow-up. Twenty-four of 253 papers were selected, reviewed, and produced the following results. (1) The initial survival rate of short implants in the posterior maxilla was not related to implant width, surface, or design; however, the cumulative success rate of rough-surface short implants was higher than that of machined-surface implants especially in performance of edentulous dental implants of length dental implants may be an alternative approach with fewer biological complications. (3) The increased crown-to-implant (C/I) ratio and occlusal table (OT) values in short dental implants with favorable occlusal loading do not seem to cause peri-implant bone loss. Higher C/I ratio does not produce any negative influence on implant success. (4) Some approaches that decrease the stress in posterior short implants use an implant designed to increase bone-implant contact surface area, providing the patient with a mutually protected or canine guidance occlusion and splinting implants together with no cantilever load. The survival rate of short implants in the posterior edentulous maxilla is high, and applying short implants under strict clinical protocols seems to be a safe and predictable technique.

  6. Comparative Evaluation of Osseointegration of Dental Endodontic Implants with and without Plasma- Sprayed Hydroxy apatite Coating

    Directory of Open Access Journals (Sweden)

    Moosavi SB

    2001-05-01

    Full Text Available Bone osseointegration around dental implant can cause earlier stabilization and fixation of implant and reduce healing time. Hydroxyapatite coating can affect bone osseointegration and enhance its rates. The aim of this study was comparison of osseointegration between plasma sprayed hydroxyapatite coated and uncoated dental implants in cats. Four endodontic implants including, vitallium and two stainless steel with and without hydroxyapatite coating were prepared and placed in mandibular canines of 20 cats after completion of root canal treatment and osseous preparation. After a healing period of 4 months, investigation by scanning electron microscopy showed significant difference in ossointegration between coated and uncoated dental implants and average bone osseointegration of coated implants was more than uncoated implants.

  7. Modelado matemático de la oseointegración de un implante dental

    OpenAIRE

    Vanegas Acosta, Juan Carlos

    2010-01-01

    Un implante dental es una pieza de biomaterial que se inserta en el hueso de la mandíbula para reemplazar la raíz de un diente ausente. Con la colocación del implante en el hueso se crea una zona de unión entre la superficie del biomaterial del implante y el hueso circundante denominada interfase hueso-implante dental. La formación de nueva matriz ósea en esta interfase crea una conexión firme y duradera entre el hueso y el implante en un proceso denominado oseointegración. El éxito de este c...

  8. [Full dental rehabilitation of a patient with implantable cardioverter defibrillator].

    Science.gov (United States)

    Imre, Ildikó; Tóth, Zsuzsanna

    2012-06-01

    During dental rehabilitation of a patient with ICD, an upper telescope retained overdenture with acrylic baseplate and lower cantilever bridges were constructed. In the consultation following the anamnesis and the clinical examination, the cardiologist did not believe antibiotic profilaxis to be necessary, adding that it is advisable to avoid the use of ultrasonic depurator and electrocauter. Nowadays after saving the life the improving of patient's better quality of life is an important aspect. The risk of ICD-implantation is minimal however, not negligible, the patient can pursue a way of life free of limitation. According to the latest trends, the number of ICD-implantations will increase exponentially in the near future, due to the aging of the population, the simplification and safeness of implantation and the increase of patients who can be treated with the device. In case of arritmia or putative dysfunction, the latest ICD-s are able to send emergency alert to the arritmia centre with the help of an outer transmitter. Probably the system will completely change the follow-up of patients with ICD within the next few years, clinical researches of its efficiency are going on at present.

  9. Passive fit and accuracy of three dental implant impression techniques.

    Science.gov (United States)

    Al Quran, Firas A; Rashdan, Bashar A; Zomar, AbdelRahman A Abu; Weiner, Saul

    2012-02-01

    To reassess the accuracy of three impression techniques relative to the passive fit of the prosthesis. An edentulous maxillary cast was fabricated in epoxy resin with four dental implants embedded and secured with heat-cured acrylic resin. Three techniques were tested: closed tray, open tray nonsplinted, and open tray splinted. One light-cured custom acrylic tray was fabricated for each impression technique, and transfer copings were attached to the implants. Fifteen impressions for each technique were prepared with medium-bodied consistency polyether. Subsequently, the impressions were poured in type IV die stone. The distances between the implants were measured using a digital micrometer. The statistical analysis of the data was performed with ANOVA and a one-sample t test at a 95% confidence interval. The lowest mean difference in dimensional accuracy was found within the direct (open tray) splinted technique. Also, the one-sample t test showed that the direct splinted technique has the least statistical significant difference from direct nonsplinted and indirect (closed tray) techniques. All discrepancies were less than 100 Μm. Within the limitations of this study, the best accuracy of the definitive prosthesis was achieved when the impression copings were splinted with autopolymerized acrylic resin, sectioned, and rejoined. However, the errors associated with all of these techniques were less than 100 Μm, and based on the current definitions of passive fit, they all would be clinically acceptable.

  10. Attitudes of general dental practitioners towards implant dentistry in an environment with widespread provision of implant therapy.

    Science.gov (United States)

    Lang-Hua, Bich Hue; Lang, Niklaus P; Lo, Edward C M; McGrath, Colman P J

    2013-03-01

    To determine attitudes of general dental practitioners in a community where provision dental implants is a well-known treatment modality; and to identify variations in the attitudes with respect to dentists' factors, training factors and implant provision factors. A questionnaire survey to a random sample of registered dentists In Hong Kong was performed. Attitudes towards implant dentistry with respect to (i) perceived superiority of implant therapy, (ii) perceived outcomes of dental implant therapy, (iii) perceived complications & maintenance issues and (iv) placement issues were ascertained. In addition, information was collected on dentists' factors, training factors and implant provision factors. Variations in attitudes towards implant dentistry were explored in bivariate and regression analyses. Among eligible practitioners (n = 246), the response rate was 46.3%. Dentists perceived implants to be superior to conventional prostheses for the replacement of a single missing posterior tooth (80%, 67) and likewise, for the replacement of a single missing anterior tooth (67%, 67), P General Dental Practitioners (GDPs), their attitudes are not wholly in line with evidence-based knowledge. Variations in their attitudes existed with respect to dentist factors, training and experience issues. © 2012 John Wiley & Sons A/S.

  11. A novel implantation model for evaluation of bone healing response to dental implants: the goat iliac crest.

    NARCIS (Netherlands)

    Schouten, C.; Meijer, G.J.; Beucken, J.J.J.P. van den; Spauwen, P.H.M.; Jansen, J.A.

    2010-01-01

    OBJECTIVES: Despite the availability of numerous animal models for testing the biological performance of dental and orthopedic implants, the selection of a suitable model is complex. This paper presents a new model for objective and standardized evaluation of bone responses to implants using the

  12. Annual bone loss and success rates of dental implants based on radiographic measurements

    NARCIS (Netherlands)

    Geraets, W.; Zhang, L.; Liu, Y.; Wismeijer, D.

    2014-01-01

    Objectives: Bone loss around dental implants is generally measured by monitoring changes in marginal bone level using radiographs. After the first year of implantation, an implant should have <0.2 mm annual loss of marginal bone level to satisfy the criteria of success. However, the process of

  13. A critical review of dental implant materials with an emphasis on titanium versus zirconia

    NARCIS (Netherlands)

    Osman, R.B.; Swain, M.V.

    2015-01-01

    The goal of the current publication is to provide a comprehensive literature review on the topic of dental implant materials. The following paper focuses on conventional titanium implants and more recently introduced and increasingly popular zirconia implants. Major subtopics include the material

  14. Finite element analysis of the stress distributions in peri-implant bone in modified and standard-threaded dental implants

    Directory of Open Access Journals (Sweden)

    Serkan Dundar

    2016-01-01

    Full Text Available The aim of this study was to examine the stress distributions with three different loads in two different geometric and threaded types of dental implants by finite element analysis. For this purpose, two different implant models, Nobel Replace and Nobel Active (Nobel Biocare, Zurich, Switzerland, which are currently used in clinical cases, were constructed by using ANSYS Workbench 12.1. The stress distributions on components of the implant system under three different static loadings were analysed for the two models. The maximum stress values that occurred in all components were observed in FIII (300 N. The maximum stress values occurred in FIII (300 N when the Nobel Replace implant is used, whereas the lowest ones, in the case of FI (150 N loading in the Nobel Active implant. In all models, the maximum tensions were observed to be in the neck region of the implants. Increasing the connection between the implant and the bone surface may allow more uniform distribution of the forces of the dental implant and may protect the bone around the implant. Thus, the implant could remain in the mouth for longer periods. Variable-thread tapered implants can increase the implant and bone contact.

  15. Mechanical properties of bone tissues surrounding dental implant systems with different treatments and healing periods.

    Science.gov (United States)

    Kim, Do-Gyoon; Kwon, Hyun-Jung; Jeong, Yong-Hoon; Kosel, Erin; Lee, Damian J; Han, Jung-Suk; Kim, Hye-Lee; Kim, Dae-Joon

    2016-11-01

    The objective of the current study was to examine whether the nanoindentation parameters can assess the alteration of bone quality resulting from different degrees of bone remodeling between bone tissue ages around the dental implant interface with different treatments and healing periods. Dental implants were placed in mandibles of six male dogs. Treatment groups included: resorbable blast media-treated titanium (Ti) implants, alumina-blasted zirconia implants (ATZ), alumina-blasted zirconia implants applied with demineralized bone matrix (ATZ-D), and alumina-blasted zirconia implants applied with rhBMP-2 (ATZ-B). Nanoindentation modulus (E), hardness (H), viscosity (η), and viscoelastic creep (Creep/P max) were measured for new and old bone tissues adjacent to the implants at 3 and 6 weeks of post-implantation. A total of 945 indentations were conducted for 32 implant systems. Significantly lower E, H, and η but higher Creep/P max were measured for new bone tissues than old bone tissues, independent of treatments at both healing periods (p  0.568). ATZ-D and ATZ-B implants had the stiffer slope of correlation between E and Creep/P max of the new bone tissue than Ti implant (p implant can provide more detailed information to understand mechanical behavior of an implant system. Ability of energy absorption in the interfacial bone tissue can play a significant role in the long-term success of a dental implant system.

  16. Periodontal ligament formation around different types of dental titanium implants. I. The self-tapping screw type implant system

    DEFF Research Database (Denmark)

    Warrer, K; Karring, T; Gotfredsen, K

    1993-01-01

    The aim of this study was to determine if a periodontal ligament can form around self-tapping, screw type titanium dental implants. Implants were inserted in contact with the periodontal ligament of root tips retained in the mandibular jaws of 7 monkeys. In each side of the mandible, 1 premolar......, a periodontal ligament can form on self-tapping, screw type titanium dental implants in areas where a void is present between the surrounding bone and the implant at the time of insertion....... and 2 molars were removed in such a manner that in approximately half the cases, the root tips were retained. Following healing, the experimental areas were examined on radiographs, and sites were selected for the insertion of the implants, so that every second implant would have a close contact...

  17. Methods to Improve Osseointegration of Dental Implants in Low Quality (Type-IV Bone: An Overview

    Directory of Open Access Journals (Sweden)

    Hamdan S. Alghamdi

    2018-01-01

    Full Text Available Nowadays, dental implants have become more common treatment for replacing missing teeth and aim to improve chewing efficiency, physical health, and esthetics. The favorable clinical performance of dental implants has been attributed to their firm osseointegration, as introduced by Brånemark in 1965. Although the survival rate of dental implants over a 10-year observation has been reported to be higher than 90% in totally edentulous jaws, the clinical outcome of implant treatment is challenged in compromised (bone conditions, as are frequently present in elderly people. The biomechanical characteristics of bone in aged patients do not offer proper stability to implants, being similar to type-IV bone (Lekholm & Zarb classification, in which a decreased clinical fixation of implants has been clearly demonstrated. However, the search for improved osseointegration has continued forward for the new evolution of modern dental implants. This represents a continuum of developments spanning more than 20 years of research on implant related-factors including surgical techniques, implant design, and surface properties. The methods to enhance osseointegration of dental implants in low quality (type-IV bone are described in a general manner in this review.

  18. Methods to Improve Osseointegration of Dental Implants in Low Quality (Type-IV) Bone: An Overview.

    Science.gov (United States)

    Alghamdi, Hamdan S

    2018-01-13

    Nowadays, dental implants have become more common treatment for replacing missing teeth and aim to improve chewing efficiency, physical health, and esthetics. The favorable clinical performance of dental implants has been attributed to their firm osseointegration, as introduced by Brånemark in 1965. Although the survival rate of dental implants over a 10-year observation has been reported to be higher than 90% in totally edentulous jaws, the clinical outcome of implant treatment is challenged in compromised (bone) conditions, as are frequently present in elderly people. The biomechanical characteristics of bone in aged patients do not offer proper stability to implants, being similar to type-IV bone (Lekholm & Zarb classification), in which a decreased clinical fixation of implants has been clearly demonstrated. However, the search for improved osseointegration has continued forward for the new evolution of modern dental implants. This represents a continuum of developments spanning more than 20 years of research on implant related-factors including surgical techniques, implant design, and surface properties. The methods to enhance osseointegration of dental implants in low quality (type-IV) bone are described in a general manner in this review.

  19. Systemic assessment of patients undergoing dental implant surgeries: A trans- and post-operative analysis

    Directory of Open Access Journals (Sweden)

    Sanjay Byakodi

    2017-01-01

    Full Text Available Background: Procedure-related and patient-related factors influence the prognosis of dental implants to a major extent. Hence, we aimed to evaluate and analyze various systemic factors in patients receiving dental implants. Materials and Methods: Fifty-one patients were included in the study, in which a total of 110 dental implants were placed. Complete examination of the subjects was done before and after placement of dental implants. Implant surgery was planned, and osseointegrated dental implants were placed in the subjects. Postoperative evaluation of the dental implant patients was done after 3 weeks. Anxiety levels were determined using State-Trait Anxiety Inventory (STAI questionnaire on the surgery day and after 1 week of surgery. The participant describes how they feel at the moment by responding to twenty items as follows: (1 absolutely not, (2 slightly, (3 somewhat, or (4 very much. All the results were recorded and statistical analyzed by SPSS software. Results: Out of 51, 29 patients were males while 22 were females, with ratio of 1.32:1. Female patients' mean age was 50.18 years while male patients' mean age was 52.71 years, with statistically nonsignificant difference between them. Functional rehabilitation was the main purpose of choosing dental implants in more than 90% of the subjects. Diameter of 3.75 mm was the shortest implants to be placed in the present study, whereas in terms of length, 8.5 mm was the shortest length of dental implant used in the present study. Tooth area in which maximum implants were placed in our study was 36 tooth region. Maximum implants were placed in Type II bone quality (n = 38. Implants installed in the mandible were clamped more efficiently than implants placed in the maxilla (P < 0.001. The difference of average STAI-State subscore before and after the surgery was statistically significant (P < 0.05; significant. Conclusion: Mandibular dental implants show more clamping (torque than maxillary

  20. Use of Antibiotic Prophylaxis for Tooth Extractions, Dental Implants and Periodontal Surgical Procedures

    OpenAIRE

    Suda, KJ; Patel, Ursula C.; Henschel, Heather; Fitzpatrick, Margaret; Evans, Charlesnika

    2017-01-01

    Abstract Background Guidelines for dental procedure antibiotic prophylaxis have changed significantly, reducing the number of patients indicated to receive antibiotics. The primary objective was to determine the frequency and appropriateness of dental antibiotic prophylaxis at a VA dental clinic. Methods This was a cross-sectional study of patients undergoing tooth extractions, dental implants and periodontal procedures in 2015. These procedures are among the most common procedures with the p...

  1. Short dental implants: A scoping review of the literature for patients with head and neck cancer.

    Science.gov (United States)

    Edher, Faraj; Nguyen, Caroline T

    2017-09-16

    Dental implants can be essential in the rehabilitation of various cancer defects, but their ideal placement can be complicated by the limited dimensions of the available host bone. Surgical interventions developed to increase the amount of bone are not all predictable or successful and can sometimes be contraindicated. Short dental implants have been suggested as an alternative option in sites where longer implants are not possible. Whether they provide a successful treatment option is unclear. The purpose of this study was to review the literature on short dental implants and assess whether they are a viable definitive treatment option for rehabilitating cancer patients with deficient bone. A scoping review of the literature was performed, including a search of established periodontal textbooks for articles on short dental implants combined with a search of PubMed, MEDLINE, EMBASE, Web of Science, and Cochrane Database of Systematic Reviews. A search for all literature published before June 2016 was based on the following keywords: ['dental implants' OR 'dental implantation, endosseous' OR 'dental prosthesis, implant supported'] AND [short]. The minimum acceptable implant length has been considered to be 6 mm. The survival rates of short implants varied between 74% and 96% at 5 years, depending on factors such as the quality of the patient's bone, primary stability of the implant, clinician's learning curve, and implant surface. Short implants can achieve results similar to those of longer implants in augmented bone and offer a treatment alternative that could reduce the need for invasive surgery and associated morbidity and be safer and more economical. Short dental implants (6 mm to 8 mm) can be used successfully to support single or multiple fixed reconstructions or overdentures in atrophic maxillae and mandibles. The use of short dental implants lessens the need for advanced and complicated surgical bone augmentation procedures, which reduces complications

  2. Occurrence of trigeminocardiac reflex during dental implant surgery: An observational prospective study.

    Science.gov (United States)

    Huang, James I-Sheng; Yu, Hui-Chieh; Chang, Yu-Chao

    2017-10-01

    Trigeminocardiac reflex (TCR) is a clinical phenomenon that manifests as s sudden onset of hemodynamic perturbations. TCR has been reported in cranio-maxillofacial surgery resulting in severe medical risks. Monitoring the hemodynamic changes during cranio-maxillofacial surgery can provide important information to ensure the continuous evaluation of patient's physical conditions. This prospective observational study was conducted to determine the hemodynamic alterations related to the possibly of occurrence of TCR in patients during dental implant surgery. One hundred and thirty-five patients (69 males and 66 females) received dental implant placement were enrolled in this study. The hemodynamic changes were evaluated by monitoring heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), and pulse oximetry (SpO2). The above data were collected before, during, and after dental implant surgery. The data demonstrated that the minimal values of HR, SBP, and DBP as well as MABP decreased significantly during operation comparing with the corresponding values before operation (p dental implant placement in the mandible, patients received dental implant placement in the maxilla had more risks to confront with MABP reduction (OR = 3.98; 95% confidence interval: 1.12-13.2). A significant HR and BP reduction possibly due to TCR can occur during dental implant surgery. Therefore, the dentists should monitor the hemodynamic changes during dental implant surgery to prevent the possible occurrence of medical risks related to TCR. Copyright © 2017. Published by Elsevier B.V.

  3. Dental Implants in the Elderly Population: A Long-Term Follow-up.

    Science.gov (United States)

    Compton, Sharon M; Clark, Danielle; Chan, Stephanie; Kuc, Iris; Wubie, Berhanu A; Levin, Liran

    The objectives of this study were to evaluate implant survival and success in the elderly population and to assess indicators and risk factors for success or failure of dental implants in older adults (aged 60 years and older). This historical prospective study was developed from a cohort of patients born prior to 1950 who received dental implants in a single private dental office. Implant survival and marginal bone levels were recorded and analyzed with regard to different patient- and implant-related factors. The study examined 245 patient charts and 1,256 implants from one dental clinic. The mean age at the time of implant placement was 62.18 ± 8.6 years. Smoking was reported by 9.4% of the cohort studied. The overall survival rate of the implants was 92.9%; 7.1% of the implants had failed. Marginal bone loss depicted by exposed threads was evident in 23.3% of the implants. Presenting with generalized periodontal disease and/or severe periodontal disease negatively influenced the survival probability of the implant. Implants placed in areas where bone augmentation was performed prior to or during implant surgery did not have the same longevity compared with those that did not have augmentation prior to implantation. The overall findings concluded that implants can be successfully placed in older adults. A variety of factors are involved in the long-term success of the implant, and special consideration should be taken prior to placing implants in older adults to limit the influence of those risk factors.

  4. Dental Implantation of Atrophic Jaws Reconstructed with Iliac Bone Graft Crest - Outcome of Seven Cases.

    Science.gov (United States)

    Bllaca, Florian; Toci, Ervin

    2016-12-15

    Iliac bone grafts are used to augment alveolar ridges followed by subsequent dental implants in completely edentulous patients. In Albania the information about these issues is scarce. To describe the procedure of iliac bone grafts augmentation of alveolar ridges and evaluate the survival rate of dental implants in completely edentulous patients in Albania. Seven totally edentulous patients (three males, average age 45.9 years) presenting at Durrës Regional Hospital during 2008-2015 and seeking a solution to their problem through implantation procedures were included in the study. Patients were thoroughly examined, evaluated and the best augmentation procedure, using iliac crest bone grafts, and dental implantation technique was chosen. The number of dental implants placed was recorded and their survival rate was calculated. The most common intervention site was maxillae (in 71.4% of cases). Dental implants were installed six months after augmentation, all fixed on the very stable augmented alveolar ridge. On average between 20%-30% of bone grafts, volume was resorbed. Of 37 implants settled, 36 of them or 97.3% survived. Iliac bone grafts are a suitable augmentation source of bone in a patient suffering from complete edentulism in Albania. The survival rate of dental implants is very satisfactory.

  5. Immediate loading of subcrestally placed dental implants in anterior and premolar sites.

    Science.gov (United States)

    Henningsen, Anders; Smeets, Ralf; Köppen, Kai; Sehner, Susanne; Kornmann, Frank; Gröbe, Alexander; Heiland, Max; Gerlach, Till

    2017-11-01

    Immediate loading of dental implants has been evolving into an appropriate procedure for the treatment of partially edentulous jaws. The purpose of this study was to evaluate the clinical success and radiological outcome of immediately and delayed loaded dental implants in anterior and premolar sites. In this retrospective study, data of 163 individuals requiring tooth removal with subsequent implant placement in anterior and premolar sites were analyzed. Implants were immediately loaded by provisional acrylic resin bridges or loaded with delay. Implants were followed up annually for up to 9 years including intraoral radiographs. A total of 285 implants in 163 patients were placed. 218 implants were immediately loaded and 67 implants with delay. Fifteen implants failed during the follow-up period resulting in survival rates of 94.5% for immediate loading and 95.5% for delayed loading. After an initial decrease of 0.3 mm in the first 12 months the marginal bone level remained stable. No statistically significant differences were found in marginal bone loss between immediately and delayed loaded implants (P = 0.518, 95% CI). Within the limits of this study, immediate loading of immediately subcrestally placed dental implants in anterior and premolar sites is a reliable treatment option for dental rehabilitation. Copyright © 2017 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  6. Antimicrobial effects of three different treatment modalities on dental implant surfaces.

    Science.gov (United States)

    Larsen, Olav Inge; Enersen, Morten; Kristoffersen, Anne Karin; Wennerberg, Ann; Bunæs, Dagmar F; Lie, Stein Atle; Leknes, Knut N

    2017-10-03

    Resolution of peri-implant inflammation and re-osseointegration of peri-implantitis affected dental implants seem to be dependent on bacterial decontamination. The aims of the this study were to evaluate the antimicrobial effects of three different instrumentations on a micro-textured dental implant surface contaminated with an avirulent or a virulent Porphyromonas gingivalis strain and to determine alterations to the implant surface following instrumentation. Forty-five dental implants (Straumann SLA) were allocated to three treatment groups: Er:YAG laser, chitosan brush, and titanium curette (10 implants each), a positive (10 implants) and a negative (five implants) control. Each treatment group and the positive control were split into subgroups of five implants subsequently contaminated with either the avirulent or virulent P. gingivalis strain. The antimicrobial effect of instrumentation was evaluated using checkerboard DNA-DNA hybridization. Implant surface alterations were determined using a light interferometer. Instrumentation significantly reduced the number of attached P. gingivalis (pimplant surface micro-texture. Neither the Er:YAG laser nor the chitosan brush significantly altered the implant surface. The three instrumentations appear to have a similar potential to remove P. gingivalis. The titanium curette significantly altered the microstructure of the implant surface.

  7. Intraoral Digital Impressioning for Dental Implant Restorations Versus Traditional Implant Impression Techniques.

    Science.gov (United States)

    Wilk, Brian L

    2015-01-01

    Over the course of the past two to three decades, intraoral digital impression systems have gained acceptance due to high accuracy and ease of use as they have been incorporated into the fabrication of dental implant restorations. The use of intraoral digital impressions enables the clinician to produce accurate restorations without the unpleasant aspects of traditional impression materials and techniques. This article discusses the various types of digital impression systems and their accuracy compared to traditional impression techniques. The cost, time, and patient satisfaction components of both techniques will also be reviewed.

  8. Ritidoplastia subperiosteal: cinco anos de experiência Subperiosteal facelift: a 5-year experience

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    Lucas Gomes Patrocínio

    2006-10-01

    Full Text Available Na ritidoplastia clássica, o centro médio da face melhora pouco. A correção estética da ptose da proeminência malar, do acentuado sulco nasolabial e da linha do jaw, em grande parte dos casos, requer um acesso diferente, adotando a técnica de ritidoplastia subperiosteal. OBJETIVO: Demonstrar a casuística e avaliar os resultados e complicações com a técnica de ritidoplastia subperiosteal no nosso serviço. PACIENTES E MÉTODOS: De janeiro de 2001 a dezembro de 2005, 25 pacientes, entre 44 e 60 anos de idade, 24 do sexo feminino, foram submetidos à ritidoplastia subperiosteal. Retrospectivamente foram avaliados resultados e complicações. RESULTADOS: Destes, 20 apresentaram resultados satisfatórios, 4 apresentaram déficit estético notado tanto pelo paciente quanto pelo cirurgião e 1 apresentou déficit estético necessitando cirurgia revisional. Todos os pacientes apresentaram melhora do sulco nasolabial, eminência malar e melhor definição da linha do jaw. A cirurgia revisional foi necessária em um paciente que referia pouca melhora. Quatro pacientes apresentaram uma retração de pele na região malar em decorrência das suturas de suspensão. Um paciente apresentou paralisia transitória do ramo frontal do nervo facial. CONCLUSÃO: A ritidoplastia subperiosteal com acesso temporal se mostrou uma técnica que produz resultados satisfatórios na grande maioria dos casos.In classic rhytidectomy, there is little improvement in the center portion of the face. Aesthetic correction of malar prominence ptosis, accentuated nasolabial line, and jawl line, in most of the cases, require different approaches, such as the subperiosteal facelift. AIM: to show the cases and to evaluate the results and complications of subperiosteal facelift in the our service. PATIENTS AND METHODS: From January of 2001 to December of 2005, 25 patients, ranging from 44 to 60 years, 24 females, were submitted to subperiosteal facelift. Results and

  9. Biomechanical study of the bone tissue with dental implants interaction

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    Navrátil P.

    2011-12-01

    Full Text Available The article deals with the stress-strain analysis of human mandible in the physiological state and after the dental implant application. The evaluation is focused on assessing of the cancellous bone tissue modeling-level. Three cancellous bone model-types are assessed: Non-trabecular model with homogenous isotropic material, nontrabecular model with inhomogeneous material obtained from computer tomography data using CT Data Analysis software, and trabecular model built from mandible section image. Computational modeling was chosen as the most suitable solution method and the solution on two-dimensional level was carried out. The results show that strain is more preferable value than stress in case of evaluation of mechanical response in cancellous bone. The non-trabecular model with CT-obtained material model is not acceptable for stress-strain analysis of the cancellous bone for singularities occurring on interfaces of regions with different values of modulus of elasticity.

  10. In vitro biological outcome of laser application for modification or processing of titanium dental implants.

    Science.gov (United States)

    Hindy, Ahmed; Farahmand, Farzam; Tabatabaei, Fahimeh Sadat

    2017-07-01

    There are numerous functions for laser in modern implant dentistry including surface treatment, surface coating, and implant manufacturing. As laser application may potentially improve osseointegration of dental implants, we systematically reviewed the literature for in vitro biological responses to laser-modified or processed titanium dental implants. The literature was searched in PubMed, ISI Web, and Scopus, using keywords "titanium dental implants," "laser," "biocompatibility," and their synonyms. After screening the 136 references obtained, 28 articles met the inclusion criteria. We found that Nd:YAG laser was the most commonly used lasers in the treatment or processing of titanium dental implants. Most of the experiments used cell attachment and cell proliferation to investigate bioresponses of the implants. The most commonly used cells in these assays were osteoblast-like cells. Only one study was conducted in stem cells. These in vitro studies reported higher biocompatibility in laser-modified titanium implants. It seems that laser radiation plays a vital role in cell response to dental implants; however, it is necessary to accomplish more studies using different laser types and parameters on various cells to offer a more conclusive result.

  11. Influence of immediate loading on provisional restoration in dental implant stability

    Science.gov (United States)

    Ikbal, M.; Odang, R. W.; Indrasari, M.; Dewi, R. S.

    2017-08-01

    The success of dental implant treatment is determined by the primary stability at placement. One factor that could influence this stability is occlusal loading through provisional restoration. Two types of loading protocols are usually used: immediate and delayed loading. However, some controversies remain about the influence of occlusal loading on implant stability. Therefore, the influence of immediate loading on implant stability must be studied. An animal study was conducted by placing nine dental implants in the mandibular jaw of three Macaca fascicularis. Provisional restorations with various occlusal contacts (no, light, and normal contact) were placed on the implant. The implant stability was measured using the Ostell ISQ three times: immediately (baseline) and at the first and second months after implant placement. The implant stability between implants with no and normal occlusal contact as well as light and normal occlusal contact showed significant differences (p implant placement. However, no significant increase (p > 0.05) in implant stability was seen at the baseline and the first and second months after implant placement for all occlusal contact groups. Immediate loading influenced the implant stability, and provisional restoration of implant without occlusal contact showed the highest implant stability.

  12. Assessment of Various Risk Factors for Success of Delayed and Immediate Loaded Dental Implants: A Retrospective Analysis.

    Science.gov (United States)

    Prasant, M C; Thukral, Rishi; Kumar, Sachin; Sadrani, Sannishth M; Baxi, Harsh; Shah, Aditi

    2016-10-01

    Ever since its introduction in 1977, a minimum of few months of period is required for osseointegration to take place after dental implant surgery. With the passage of time and advancements in the fields of dental implant, this healing period is getting smaller and smaller. Immediate loading of dental implants is becoming a very popular procedure in the recent time. Hence, we retrospectively analyzed the various risk factors for the failure of delayed and immediate loaded dental implants. In the present study, retrospective analysis of all the patients was done who underwent dental implant surgeries either by immediate loading procedure or by delayed loading procedures. All the patients were divided broadly into two groups with one group containing patients in which delayed loaded dental implants were placed while other consisted of patients in whom immediate loaded dental implants were placed. All the patients in whom follow-up records were missing and who had past medical history of any systemic diseases were excluded from the present study. Evaluation of associated possible risk factors was done by classifying the predictable factors as primary and secondary factors. All the results were analyzed by Statistical Package for the Social Sciences (SPSS) software. Kaplan-Meier survival analyses and chi-square test were used for assessment of level of significance. In delayed and immediate group of dental implants, mean age of the patients was 54.2 and 54.8 years respectively. Statistically significant results were obtained while comparing the clinical parameters of the dental implants in both the groups while demographic parameters showed nonsignificant correlation. Significant higher risk of dental implant failure is associated with immediate loaded dental implants. Tobacco smoking, shorter implant size, and other risk factors play a significant role in predicting the success and failure of dental implants. Delayed loaded dental implant placement should be preferred

  13. [Three dimensional finite element analysis of biomechanical distribution of dental implants with immediate loading].

    Science.gov (United States)

    Han, Xue-Lian; Liu, Zong-Wei; Li, Yan-Tao

    2011-04-01

    To analyze the stress distribution of bone around the dental implants with lateral immediate loading of different angles by three dimensional finite element. An adult edentulous mandible was adopted for CT scanning. The CT image was imported to universal surgical integration system to establish a mandible three dimensional mesh model. The real shape of standard thread implant was simulated and the finite element model of mandible with dental implants for immediate loading was established. The models were immediately loaded with 150 N through the angle of 0 degrees, 10 degrees, 20 degrees, 30 degrees. The ANSYS 10.0 was used to analyze the Von Mises stress on the bone around dental implants. The accurate finite element model of mandible with dental implants for immediate loading was successfully established. The three dimensional finite element analytical results showed: Under axial load, the Von Mises stress of bone contact surface concentrated on the cortical bone of the implant cervix. The strain distribution was even, and centralized at the cortical bone of the implant cervix, cancellous bone of implant bottom and thread contact area. Under different lateral angle load, the Von Mises stress of bone contact surface also concentrated on the cortical bone of the implant cervix, but the maximum value was 4 times of the vertical loading, the strain distributed unevenly, mainly concentrated on the cortical bone of the implant cervix. With the load angle increased, the stress and the strain value also increased. When an axial force was immediately loaded, the stress value and the strain concentration value of bone interface around the dental implants are not apparently concentrated, the stress is distributed well. While a lateral force is loaded, the stress values and the strain concentration values of bone interface around the dental implants apparently increase and the strain are distributed unevenly.

  14. Experimental study on penetration of dental implants into the maxillary sinus in different depths

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    Weijian ZHONG

    2013-12-01

    Full Text Available The exposing of dental implant into the maxillary sinus combined with membrane perforation might increase risks of implant failure and sinus complications. Objective: The purpose of this study was to investigate the effects of the dental implant penetration into the maxillary sinus cavity in different depths on osseointegration and sinus health in a dog model. Material and Methods: Sixteen titanium implants were placed in the bilateral maxillary molar areas of eight adult mongrel dogs, which were randomly divided into four groups according to the different penetrating extents of implants into the sinus cavities (group A: 0 mm; group B: 1 mm; group C: 2 mm; group D: 3 mm. The block biopsies were harvested five months after surgery and evaluated by radiographic observation and histological analysis. Results: No signs of inflammatory reactions were observed in any maxillary sinus of the eight dogs. The tips of the implants with penetrating depth of 1 mm and 2 mm were found to be fully covered with newly formed membrane and partially with new bone. The tips of the implants with penetrating depth over 3 mm were exposed in the sinus cavity and showed no membrane or bone coverage. No significant differences were found among groups regarding implant stability, bone-to-implant contact (BIC and bone area in the implant threads (BA. Conclusions: Despite the protrusion extents, penetration of dental implant into the maxillary sinus with membrane perforation does not compromise the sinus health and the implant osseointegration in canine.

  15. Evaluation of implant-materials as cell carriers for dental stem cells under in vitro conditions.

    Science.gov (United States)

    Gosau, Martin; Viale-Bouroncle, Sandra; Eickhoff, Hannah; Prateeptongkum, Esthera; Reck, Anja; Götz, W; Klingelhöffer, Christoph; Müller, Steffen; Morsczeck, Christian

    2015-12-01

    Dental stem cells in combination with implant materials may become an alternative to autologous bone transplants. For tissue engineering different types of soft and rigid implant materials are available, but little is known about the viability and the osteogenic differentiation of dental stem cells on these different types of materials. According to previous studies we proposed that rigid bone substitute materials are superior to soft materials for dental tissue engineering. We evaluated the proliferation, the induction of apoptosis and the osteogenic differentiation of dental stem/progenitor cells on a synthetic bone-like material and on an allograft product. The soft materials silicone and polyacrylamide (PA) were used for comparison. Precursor cells from the dental follicle (DFCs) and progenitor cells from the dental apical papilla of retained third molar tooth (dNC-PCs) were applied as dental stem cells in our study. Both dental cell types attached and grew on rigid bone substitute materials, but they did not grow on soft materials. Moreover, rigid bone substitute materials only sustained the osteogenic differentiation of dental stem cells, although the allograft product induced apoptosis in both dental cell types. Remarkably, PA, silicone and the synthetic bone substitute material did not induce the apoptosis in dental cells. Our work supports the hypothesis that bone substitute materials are suitable for dental stem cell tissue engineering. Furthermore, we also suggest that the induction of apoptosis by bone substitute materials may not impair the proliferation and the differentiation of dental stem cells.

  16. Designing a safety checklist for dental implant placement: a Delphi study.

    Science.gov (United States)

    Christman, Adam; Schrader, Stuart; John, Vanchit; Zunt, Susan; Maupome, Gerardo; Prakasam, Sivaraman

    2014-02-01

    Complications during and after dental implant placement can be a hindrance to successful treatment. Checklists are emerging as useful tools in error reduction in various fields. The authors selected a Delphi panel to explore the appropriate clinical practices involved in implant placement, with the objective of formulating a safety checklist that would aid in reducing errors. The authors administered a Delphi method survey to an expert panel of 24 board-certified periodontists to determine if consensus existed regarding the critical steps involved in implant placement. They defined consensus as 90 percent agreement among participants. Using the Delphi data, the authors designed a safety checklist for implant placement. The panelists generated 20 consensus statements regarding essential steps in implant placement. The authors divided the statements into preoperative, intraoperative and postoperative phases. To determine the rationale for consensus decisions, the authors conducted a thematic qualitative analysis of responses to all open-ended questionnaire items, asking panel members how or why a particular procedure was performed. The panelists reached a consensus regarding the steps they considered critical in implant placement. Further research is needed to assess the acceptance and effectiveness of this type of checklist in a clinical setting. Practical Implications. The authors developed a checklist that may be useful in reducing errors in placement of dental implants. If effective, this checklist ultimately will aid in minimizing risk and increasing implant success rates, especially for inexperienced practitioners, dental students, surgical residents and dental implant trainees (that is, dentists undergoing training to place implants through continuing education courses).

  17. Atypical Case of Three Dental Implants Displaced into the Maxillary Sinus

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    João Felipe Bonatto Bruniera

    2015-01-01

    Full Text Available Oral rehabilitation with dental implants has become a routine treatment in contemporary dentistry. The displacement of dental implants into the sinus membrane, a complication related to the maxillary sinus, is one of the most common accidents reported in the literature. The treatment for this complication is the surgical removal of the implant. A 60-year-old woman with three dental implants displaced into the maxillary sinus (one implant displaced into the left maxillary sinus and two implants displaced into the right maxillary sinus underwent surgery for removal of the implants. The surgery to remove the implants was performed under local anesthesia through the Caldwell-Luc technique. The patient was subsequently administered antibiotic, anti-inflammatory, and analgesic drugs. The patient returned 7 days after the surgery for suture removal and is being regularly monitored to determine whether future rehabilitation of the edentulous area is necessary. In conclusion, surgical removal of the dental implant displaced into the maxillary sinus is the treatment of choice. This technique is appropriate because it allows the use of local anesthesia and provides direct visualization for the removal of the implants.

  18. Biofilm formation on dental restorative and implant materials.

    Science.gov (United States)

    Busscher, H J; Rinastiti, M; Siswomihardjo, W; van der Mei, H C

    2010-07-01

    Biomaterials for the restoration of oral function are prone to biofilm formation, affecting oral health. Oral bacteria adhere to hydrophobic and hydrophilic surfaces, but due to fluctuating shear, little biofilm accumulates on hydrophobic surfaces in vivo. More biofilm accumulates on rough than on smooth surfaces. Oral biofilms mostly consist of multiple bacterial strains, but Candida species are found on acrylic dentures. Biofilms on gold and amalgam in vivo are thick and fully covering, but barely viable. Biofilms on ceramics are thin and highly viable. Biofilms on composites and glass-ionomer cements cause surface deterioration, which enhances biofilm formation again. Residual monomer release from composites influences biofilm growth in vitro, but effects in vivo are less pronounced, probably due to the large volume of saliva into which compounds are released and its continuous refreshment. Similarly, conflicting results have been reported on effects of fluoride release from glass-ionomer cements. Finally, biomaterial-associated infection of implants and devices elsewhere in the body is compared with oral biofilm formation. Biomaterial modifications to discourage biofilm formation on implants and devices are critically discussed for possible applications in dentistry. It is concluded that, for dental applications, antimicrobial coatings killing bacteria upon contact are more promising than antimicrobial-releasing coatings.

  19. Evaluating the health economic implications and cost-effectiveness of dental implants: a literature review.

    Science.gov (United States)

    Vogel, Robert; Smith-Palmer, Jayne; Valentine, William

    2013-01-01

    To review the available literature on the costs and cost-effectiveness of dental implant-supported or -retained prostheses versus tooth-supported fixed partial denture restorations or mucosa-borne conventional complete or partial dentures. A systematic literature review of the PubMed, EMBASE, and Cochrane Library databases was conducted, restricted to studies published in English between November 2000 and November 2010. The searches returned a total of 381 unique hits, and a total of 14 studies on the long-term costs or cost-effectiveness of dental implants were included in the final review. A true systemic review was complicated by the heterogeneity of the conducted studies. For single-tooth replacement, dental implants were generally either cost saving or cost-effective in comparison with tooth replacement using traditional fixed dental prostheses. For patients with mandibular edentulism, dental implants were associated with higher initial costs in comparison with conventional mucosa-borne dentures. However, the consensus among most studies was that, over the long term, dental implants represent a cost-effective treatment option. Additionally, patient acceptance, satisfaction, and willingness to pay for dental implants were high, particularly in elderly edentulous patients. A trend toward improved overall health and decreased health care costs was also reported. For single-tooth replacement, a single implant was a cost-effective treatment option in comparison with a traditional three-unit fixed dental prosthesis. For the replacement of multiple teeth, dental implants (fixed or removable prostheses) were associated with higher initial costs but better improvements in oral health-related quality of life compared with other treatment options.

  20. Dental Implant Macro-Design Features Can Impact the Dynamics of Osseointegration.

    Science.gov (United States)

    Vivan Cardoso, Marcio; Vandamme, Katleen; Chaudhari, Amol; De Rycker, Judith; Van Meerbeek, Bart; Naert, Ignace; Duyck, Joke

    2015-08-01

    The purpose of this study was to compare the clinical performance of two dental implant types possessing a different macro-design in the in vivo pig model. Titanium Aadva(TM) implants (GC, Tokyo, Japan) were compared with OsseoSpeed(TM) implants (Astra, Mölndal, Sweden), with the Aadva implant displaying significant larger inter-thread dimensions than the OsseoSpeed implant. Implants were installed in the parietal bone of 12 domestic pigs and left for healing for either 1 or 3 months. Implant osseointegration was evaluated by quantitative histology (bone volume relative to the tissue volume [BV/TV]; bone-to-implant contact [BIC]) for distinct implant regions (collar, body, total implant length) with specific implant thread features. The Wilcoxon-Mann-Whitney nonparametric test with α = 0.05 was performed. An inferior amount of bone enveloping the Aadva implant compared with the OsseoSpeed implant was observed, in particular at the implant body part with its considerable inter-thread gaps (p design negatively affected the amount of bone in direct contact with the implant for this specific implant part (p design features can impact the dynamics of implant osseointegration. Consideration of specific implant macro-design features should be made relative to the biological and mechanical microenvironment. © 2013 Wiley Periodicals, Inc.

  1. Estimates of Hospital Based Emergency Department Visits due to Dental Implant Failures in the United States.

    Science.gov (United States)

    Elangovan, Satheesh; Allareddy, Veerasathpurush

    2016-06-01

    Objective of the current study is to provide nationally representative estimates of hospital based emergency department (ED) visits attributed to dental implant failures in the United States. The Nationwide Emergency Department sample for the years 2008-2010 was used. All ED visits with a diagnosis of "dental implant failures" were selected for analysis. Patient demographics were examined. Outcomes of interest included disposition status following the ED visit and ED charges. During the study period, a total of 1200 ED visits were due to dental implant failures. Most ED visits with dental implant failures occurred among those aged dental implant occurred in 31.7% of patients while post-osseointegration mechanical failure of dental implant occurred in 30.4% of patients. Following an ED visit, 82.8% were discharged routinely and 13.3% of patients were admitted as in-patients into the same hospital following the ED visit. The mean ED charge per visit was $1167. Highest proportions of these ED visits were comprised of those aged implant failures. Copyright © 2016 Elsevier Inc. All rights reserved.

  2. Identificación radiográfica de implantes dentales

    OpenAIRE

    Insua Brandariz, Ángel

    2012-01-01

    La identificación de implantes dentales en pacientes sin registros clínicos representa un problema importante y creciente debido a la movilidad de la población, al incremento del número de implantes colocados, así como al aumento del número de diseños y sistemas de implantes. Objetivos 1. Crear la primera base de datos donde se describan las características morfo-radiográficas de todos los tipos de implantes dentales. 2. Identificar morfológica y radiográficamente los implan...

  3. Persistent pain and neurosensory disturbance after dental implant surgery: pathophysiology, etiology, and diagnosis.

    Science.gov (United States)

    Al-Sabbagh, Mohanad; Okeson, Jeffrey P; Khalaf, Mohd W; Bhavsar, Ishita

    2015-01-01

    Many studies have documented the successful outcomes of dental implants, but have also reported the association of sensory disturbances with the surgical implant procedure. Postsurgical pain is a normal response to tissue injury, and usually resolves after the tissue heals. However, some patients who receive dental implants experience persistent pain even after normal healing. This article describes the basic anatomy and pathophysiology associated with nerve injury. The incidence and diagnosis of these problems, in addition to factors that result in the development of chronic persistent neuropathic pain and sensory disturbances associated with surgical implant placement, are discussed. Copyright © 2015 Elsevier Inc. All rights reserved.

  4. Systematic review of primary osseointegrated dental implants in head and neck oncology.

    Science.gov (United States)

    Barber, A J; Butterworth, C J; Rogers, S N

    2011-01-01

    The aim of this paper is to provide a systematic review of articles concerning primary osseointegrated dental implants in the head and neck oncology setting. We searched MEDLINE (1950 to March 2009) and Embase (1980 to March 2009) using the terms head and neck, oral, maxillofacial, craniofacial, jaws, mandible, maxilla, zygoma, dental implants, osseointegrated implants, implants, tumour, cancer, oncology, immediate, simultaneous, and primary. Two authors independently reviewed the abstracts, and all those written in the English language that referred to the placement of primary dental implants in patients with cancer of the head neck were included. Articles that referred to craniofacial or extraoral implants were excluded. Of 892 abstracts 83 were eligible for further consideration; the full articles were evaluated, and 41 that complied fully with the inclusion criteria are presented as a tabulated summary. There are three case reports, 13 reviews, and 25 clinical studies. Eight of the clinical studies refer solely to the insertion of dental implants at the time of primary oncological resection, and only two were of a prospective design. We have concisely summarised publications concerning primary dental implants, and our findings will help to inform head and neck cancer teams, particularly oncological surgeons, restorative dentists, and maxillofacial prosthodontists of the evidence base surrounding this approach to oral rehabilitation. Copyright © 2010 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  5. The psychosocial impacts of implantation on the dental aesthetics of missing anterior teeth patients.

    Science.gov (United States)

    Chen, P; Yu, S; Zhu, G

    2012-12-01

    The aim of the current study was to investigate the psychosocial impact of dental aesthetics among patients who received anterior implant-supported prostheses. The current study is a cross-sectional evaluation involving 115 individuals who had gone through treatment at the dental clinics of general hospitals. Participants completed the Chinese version of the psychosocial impact of dental aesthetics questionnaire (PIDAQ) before implantation and six months after crown restoration. Basic demographic information was recorded. Six months after implant crown restoration, participants were asked to self-assess their own oral aesthetics compared to before implantation. A total of 106 patients completed the study. PIDAQ scores correlated significantly with the self-assessment of the degree of oral aesthetics. Six months after crown restoration, the two factors (social impact and aesthetic attitude) decreased and the dental self-confidence score increased significantly compared to pre-implantation scores. Gender and education level significantly affected PIDAQ. Anterior implant-supported prostheses significantly affected the patients' psychosocial perception. Implantation of missing anterior teeth can significantly improve patients' negative psychosocial impact of dental aesthetics. Gender and education level are correlated with the degree of improvement. The PIDAQ can be used in assessing the psychosocial effects of implantation in missing anterior teeth.

  6. Intake of Proton Pump Inhibitors Is Associated with an Increased Risk of Dental Implant Failure.

    Science.gov (United States)

    Chrcanovic, Bruno Ramos; Kisch, Jenö; Albrektsson, Tomas; Wennerberg, Ann

    To investigate the association between the intake of proton pump inhibitors (PPIs) and the risk of dental implant failure. The present retrospective cohort study is based on patients consecutively treated between 1980 and 2014 with implant-supported/retained prostheses at one specialist clinic. Modern endosseous dental implants with cylindrical or conical design were included, and only complete cases were considered; ie, only those implants with information available for all variables measured were included in the regression model analysis. Zygomatic implants and implants detected in radiographies but without basic information about them in the patients' files were excluded from the study. Implant- and patient-related data were collected. Multilevel mixed-effects parametric survival analysis was used to test the association between PPI exposure (predictor variable) and risk of implant failure (outcome variable), adjusting for several potential confounders. A total of 3,559 implants were placed in 999 patients, with 178 implants reported as failures. The implant failure rates were 12.0% (30/250) for PPI users and 4.5% (148/3,309) for nonusers. A total of 45 out of 178 (25.3%) failed implants were lost up to abutment connection (6 in PPI users, 39 in nonusers), with an early-to-late failure ratio of 0.34:1. The intake of PPIs was shown to have a statistically significant negative effect for implant survival rate (HR 2.811; 95% CI: 1.139 to 6.937; P = .025). Bruxism, smoking, implant length, prophylactic antibiotic regimen, and implant location were also identified as factors with a statistically significant effect on the implant survival rate. This study suggests that the intake of PPIs may be associated with an increased risk of dental implant failure.

  7. Implant stability and marginal bone level of microgrooved zirconia dental implants: A 3-month experimental study on dogs

    Directory of Open Access Journals (Sweden)

    Delgado-Ruíz Rafael Arcesio

    2014-01-01

    Full Text Available Background/Aim. The modification of implant surfaces could affect mechanical implant stability as well as dynamics and quality of peri-implant bone healing. The aim of this 3-month experimental study in dogs was to investigate implant stability, marginal bone levels and bone tissue response to zirconia dental implants with two laser-micro-grooved intraosseous surfaces in comparison with nongrooved sandblasted zirconia and sandblasted, high-temperature etched titanium implants. Methods. Implant surface characterization was performed using optical interferometric profilometry and energy dispersive X-ray spectroscopy. A total of 96 implants (4 mm in diameter and 10 mm in length were inserted randomly in both sides of the lower jaw of 12 Fox Hound dogs divided into groups of 24 each: the control (titanium, the group A (sandblasted zirconia, the group B (sandblasted zirconia plus microgrooved neck and the group C (sandblasted zirconia plus all microgrooved. All the implants were immediately loaded. Insertion torque, periotest values, radiographic crestal bone level and removal torque were recorded during the 3-month follow-up. Qualitative scanning electon micro-scope (SEM analysis of the bone-implant interfaces of each group was performed. Results. Insertion torque values were higher in the group C and control implants (p the control > the group B > the group A (p the control > the group B > the group A (p < 0.05. SEM showed that implant surfaces of the groups B and C had an extra bone growth inside the microgrooves that corresponded to the shape and direction of the microgrooves. Conclusion. The addition of micro-grooves to the entire intraosseous surface of zirconia dental implants enhances primary and secondary implant stability, promotes bone tissue ingrowth and preserves crestal bone levels.

  8. [Clinical observation of alveolar bone status of ankylos dental implants with completion of restoration].

    Science.gov (United States)

    Chen, Tie; Li, Yinghua; Li, Zejian; Lai, Renfa

    2012-06-01

    To provide basis for clinical application of ANKYLOS dental implants by following up alveolar bone status of 318 pieces of restored ANKYLOS dental implants. Between February 2008 and August 2009, 170 patients with dentition defect underwent placement of ANKYLOS dental implants (318 pieces). There were 74 males (133 pieces) and 96 females (185 pieces) with an average age of 43.8 years (range, 23-68 years). After operation, the periapical X-ray films were taken to observe osseointegration around the neck of implant, alveolar bone resorption, and survival of implants. All patients were followed up at 6, 12, and 24 months after operation. There were 9 failure implants with a total dental implants survival rate of 97.17% (309/318): 3 at 6 months, 4 at 6-12 months, and 2 at 12-24 months, showing no significant difference in dental implants survival rate among 3 time points (chi2=0.470 3, P=0.492 8). New bone formed around the neck of implant in 4 cases at 6 months and in 31 cases at 12 months; at 6, 12, and 24 months, the bone increase was (0.392 7 +/- 0.217 4), (0.633 5 +/- 0.202 1), and (0.709 0 +/- 0.199 1) mm, respectively, showing significant differences among 3 time points (P ANKYLOS dental implant, alveolar bone status is good and the implant success rate is high during short-term follow-up. But further observation and study are required for long-term effectivness.

  9. Management of the Nasopalatine Canal and Foramen Associated With Dental Implant Therapy.

    Science.gov (United States)

    Cavallaro, John; Tsuji, Shota; Chiu, Tzu-Shan; Greenstein, Gary

    2016-06-01

    In some patients, the contents of the nasopalatine canal must be removed to facilitate placement of a dental implant into the canal. Reasons to enucleate the canal in preparation for a bone graft or a dental implant include inadvertent perforation into the canal when creating an osteotomy for an implant, severe atrophy of the maxilla, and a large foramen that precludes placing an implant into the desired location along the bony ridge. The authors searched the dental literature for clinical reports in humans that addressed placement of dental implants into or adjacent to the nasopalatine canal. They found that the nasopalatine canal is usually around 10-mm long and 4-mm wide and slants from the horizontal plane at a 66-degree angle, and there is considerable variation regarding these measurements. Several clinical reports demonstrate that the canal can be enucleated and bone grafted before successful implant placement. It is also possible to place an implant into the canal at the time of surgery and this procedure may or may not be combined with an adjunctive bone graft. Numerous case reports indicate there is usually no permanent loss of sensation of the anterior palate when an implant is placed into the nasopalatine canal. The authors concluded that placing an implant into the nasopalatine canal is a viable procedure as part of a surgical and prosthetic treatment plan when there is a dearth of alternate sites for implant placement. In patients with severe atrophy of the maxilla, combination syndrome, or who have a large or malpositioned nasopalatine canal, the canal can be used as a site to place a dental implant to support a fixed or removable dental prosthesis.

  10. Oral rehabilitation with dental implants and quality of life following mandibular reconstruction with free fibular flap.

    Science.gov (United States)

    Jacobsen, Hans-Christian; Wahnschaff, Falko; Trenkle, Thomas; Sieg, Peter; Hakim, Samer G

    2016-01-01

    Bony reconstruction of jaw defects using the free fibular flap and dental rehabilitation mostly requires insertion of dental implants within the transferred fibula bone. The aim of this paper was to discuss results of the implant stability with data on the possible benefit for the patient's quality of life after such treatment. For clinical outcome of implants, we evaluated 26 patients with a total number of 94 dental implants after a follow-up period of 12 to 132 months. A group of 38 patients who underwent mandibular reconstruction with free fibular flap could be included in the life-quality study. Evaluation included 23 patients with and 15 patients without implant-borne restoration. The quality of life was assessed using the standard QLQ C-30 questionnaire and the H&N35 module of the European Organisation for Research and Treatment of Cancer (EORTC). Of implants, 94.7 % were stable at the time of investigation and could be used for prosthesis. Patients with dental implants reported improvement of life quality along with better scores in most function and symptom scales; however, only values for global health status (QL2), absence of dyspnea (DY) and absence of feeding tube (HNFE) were significantly better than in the control group. Dental implant insertion in fibula grafts along with implant-borne restoration is a proven concept and might lead to improved quality of life following ablative surgery of the jaw. The effect on the quality of life is not as predictable as on the implant stability. Patients with bony defects of the jaw require bony reconstruction. This allows further masticatory rehabilitation using dental implants and might lead to improved quality of life.

  11. Toward optimizing dental implant performance: Surface characterization of Ti and TiZr implant materials.

    Science.gov (United States)

    Murphy, M; Walczak, M S; Thomas, A G; Silikas, N; Berner, S; Lindsay, R

    2017-01-01

    Targeting understanding enhanced osseointegration kinetics, the goal of this study was to characterize the surface morphology and composition of Ti and TiZr dental implant substrates subjected to one of two surface treatments developed by Straumann. These two treatments are typically known as SLA and SLActive, with the latter resulting in more rapid osseointegration. A range of techniques was applied to characterize four different substrate/surface treatment combinations (TiSLA, TiSLActive, TiZrSLA, and TiZrSLActive). Contact angle measurements established their hydrophilic/hydrophobic nature. Surface morphology was probed with scanning electron microscopy. X-ray diffraction, Raman μ-spectroscopy, and X-ray photoelectron spectroscopy were used to elucidate the composition of the near-surface region. Consistent with previous work, surface morphology was found to differ only at the nanoscale, with both SLActive substrates displaying nano-protrusions. Spectroscopic data indicate that all substrates exhibit surface films of titanium oxide displaying near TiO2 stoichiometry. Raman μ-spectroscopy reveals that amorphous TiO2 is most likely the only phase present on TiSLA, whilst rutile-TiO2 is also evidenced on TiSLActive, TiZrSLA, and TiZrSLActive. For TiZr alloy substrates, there is no evidence of discrete phases of oxidized Zr. X-ray photoelectron spectra demonstrate that all samples are terminated by adventitious carbon, with it being somewhat thicker (∼1nm) on TiSLA and TiZrSLA. Given previous in vivo studies, acquired data suggest that both nanoscale protrusions, and a thinner layer of adventitious carbon contribute to the more rapid osseointegration of SLActive dental implants. Composition of the surface oxide layer is apparently less important in determining osseointegration kinetics. Copyright © 2016 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

  12. Long-term evaluation of hollow screw and hollow cylinder dental implants : Clinical and radiographic results after 10 years

    NARCIS (Netherlands)

    Telleman, Gerdien; Meijer, Henny J. A.; Raghoebar, Gerry M.

    Background: In 1988, an implant manufacturer offered a new dental implant system, with a wide choice of hollow cylinder (HC) and hollow screw (HS) implants. The purpose of this retrospective study of HS and HC implants was to evaluate clinical and radiographic parameters of peri-implant tissue and

  13. Training standards in implant dentistry for general dental practitioners. A report.

    Science.gov (United States)

    Martin, Michael V

    2006-07-01

    In December 2005, the General Dental Council (GDC) convened a small working group to consider training standards for general dental practitioners (GDPs) who wish to practise implant dentistry. The membership of this group is given at the end of this report. The secretariat for the group was provided jointly by the GDC and the Faculty of General Dental Practice (UK). The remit of the group (which was independent of any organisation) was to consider what training standards would be necessary for a GDP before practising implant dentistry, to publish those standards, and then periodically to review them in the light of developments in implant dentistry. Such standards can be used not only by practitioners but also by the GDC in the consideration of patient complaints against dental practitioners who, allegedly, practise implant dentistry beyond the limits of their competence.

  14. Comparative Evaluation of Osseointegration of Dental Endodontic Implants with and without Plasma- Sprayed Hydroxy apatite Coating

    National Research Council Canada - National Science Library

    Moosavi SB; Fathi MH. BS; MSC; Feizi Gh; Mortazavi V

    2001-01-01

    ... treatment and osseous preparation. After a healing period of 4 months, investigation by scanning electron microscopy showed significant difference in ossointegration between coated and uncoated dental implants and average bone...

  15. Bruxism: overview of current knowledge and suggestions for dental implants planning

    NARCIS (Netherlands)

    Manfredini, D.; Bucci, M.B.; Sabattini, V.B.; Lobbezoo, F.

    2011-01-01

    Bruxism is commonly considered a detrimental motor activity, potentially causing overload of the stomatognathic structures and representing a risk factor for dental implant survival. The available literature does not provide evidence-based guidelines for the management of bruxers undergoing

  16. Caracterizacion metalografica de barras para sobredentaduras, elaboradas por sobrecolado de pilares para implantes dentales

    National Research Council Canada - National Science Library

    Castro, Irvin J; Valencia, Carlos H; Echeverri, Diana; Garzon, Herney; Molina, Anthony; Olave, Gilberto; Parra, Maritza

    2013-01-01

    Introduccion: la dificultad en el manejo de protesis totales convencionales en pacientes totalmente edentulos puede ser mejorada con el uso de sistemas de anclaje sobre implantes dentales para sobredentaduras...

  17. On-Site Surface Functionalization for Titanium Dental Implant with Nanotopography: Review and Outlook

    Directory of Open Access Journals (Sweden)

    Byung Gyu Kim

    2016-01-01

    Full Text Available Titanium (Ti has been the first choice of material for dental implant due to bonding ability to natural bone and great biocompatibility. Various types of surface roughness modification in nanoscale have been made as promising strategy for accelerating osseointegration of Ti dental implant. To have synergetic effect with nanotopography oriented favors in cell attachment, on-site surface functionalization with reproducibility of nanotopography is introduced as next strategy to further enhance cellular bioactivity. Extensive research has been conducted to investigate the potential of nanotopography preserved on-site surface functionalization for Ti dental implant. This review will discuss nonthermal atmospheric pressure plasma, ultraviolet, and low level of laser therapy on Ti dental implant with nanotopography as next generation of surface functionalization due to its abilities to induce superhydrophilicity or biofunctionality without change of nanotopography.

  18. The status of undergraduate implant education in dental schools outside the United States.

    Science.gov (United States)

    Seckinger, R J; Weintraub, A M; Berthold, P; Weintraub, G S

    1995-01-01

    Over the past 20 years the incorporation of implant dentistry into academia has been documented in some detail for North American dental schools but has not been pursued on an international level. In June of 1993, we surveyed 51 dental schools outside of the United States affiliated with the University of Pennsylvania School of Dental Medicine's Office of International Relations concerning their teaching involvement with implant dentistry. Results from the 44 (86 percent) responding schools suggest that implant dentistry is being incorporated into predoctoral curriculums. Industrialized countries were more inclined to provide implant education. Insufficient time and the thought that the predoctoral level was not the place for implant dentistry were cited as some of the reasons for not incorporating implant dentistry into the curriculum. Oral surgery, prosthodontics, and periodontics departments developed and administered the implant curriculum. Formats varied among schools with respect to allotted time, curricular placement, laboratory experience, and clinical participation. Didactic material most frequently presented included a historical overview, diagnosis and treatment planning, classification of dental implants, and surgical and prosthetic concepts. Clinical involvement varied from actual implant placement to observation of prosthodontic procedures. Results were categorized based on the TOEFL (Test of English as a Foreign Language) classification of countries in six regions.

  19. Viability of dental implants in head and neck irradiated patients: A systematic review.

    Science.gov (United States)

    Zen Filho, Edson Virgílio; Tolentino, Elen de Souza; Santos, Paulo Sérgio Silva

    2016-04-01

    The purpose of this systematic review was to evaluate the safety of dental implants placed in irradiated bone and to discuss their viability when placed post-radiotherapy (RT). A systematic review was performed to answer the questions: "Are dental implants in irradiated bone viable?" and "What are the main factors that influence the loss of implants in irradiated patients?" The search strategy resulted in 8 publications. A total of 331 patients received 1237 implants, with an overall failure rate of 9.53%. The osseointegration success rates ranged between 62.5% and 100%. The optimal time interval between irradiation and dental implantation varied from 6 to 15 months. The interval time between RT and implant placement and the radiation doses are not associated with significant implant failure rates. The placement of implants in irradiated bone is viable, and head and neck RT should not be considered as a contraindication for dental rehabilitation with implants. © 2015 Wiley Periodicals, Inc. Head Neck 38: E2229-E2240, 2016. © 2015 Wiley Periodicals, Inc.

  20. The provision of dental implants in the National Health Service Hospital dental services--a national questionnaire.

    Science.gov (United States)

    Butterworth, C J; Baxter, A M; Shaw, M J; Bradnock, G

    2001-01-27

    To assess the activity of consultants in restorative dentistry in the United Kingdom in the provision of osseointegrated dental implants within the National Health Service Hospital service and to evaluate their attitudes concerning the relevant medical and oral factors considered in patient selection for implant treatment. Anonymous postal questionnaire in the United Kingdom. Consultants in restorative dentistry. Out of the sample of 145, 109 consultants (75%) completed the questionnaire in 1999. 54 of the 109 consultants (49.5%) are involved in the provision of osseointegrated implant treatment, treating an average of 29 cases/year (range 2-150). However, over one third of the respondents treated 10 or less cases/year. 89% worked with oral surgeons as an implant team. 68% used Branemark (Nobel Biocare) implants as their main system. The majority of consultants felt that smoking, psychoses and previous irradiation were the most important medical factors that contra-indicated implant retained restorations whilst untreated periodontitis, poor oral hygiene and uncontrolled caries were the most important oral contra-indications. Many centres were experiencing significant problems with the funding of implant treatment with one centre receiving no funding. The implications for patient care and specialist training are discussed. There is a marked variation in the number of patients treated with endosseous dental implants within the United Kingdom National Health Service hospitals. Many consultants treat 10 or fewer patients each year. In the main, there is agreement about the factors that contra-indicate implant treatment; these are in line with national guidelines.

  1. A novel implantation model for evaluation of bone healing response to dental implants: the goat iliac crest.

    Science.gov (United States)

    Schouten, C; Meijer, G J; van den Beucken, J J J P; Spauwen, P H M; Jansen, J A

    2010-04-01

    Despite the availability of numerous animal models for testing the biological performance of dental and orthopedic implants, the selection of a suitable model is complex. This paper presents a new model for objective and standardized evaluation of bone responses to implants using the iliac crest in goats. The feasibility of the iliac crest model regarding anatomy and implant positioning was determined using two cadaveric specimens and the bone structure was evaluated and compared with that of the goat femoral condyle. Additionally, the validity of the model was tested by performing an in vivo study. By means of a rather simple, safe, fast and reproducible surgical procedure, the iliac crest in goats could be approached and allowed the implantation of maximally five dental implants per iliac crest. Because of the bilateral implantation possibility, statistical comparisons between groups on either side of the goat could be performed, resulting in a high statistical power, and hence a reduction in the number of animals required to obtain significant data. In terms of surgical approach, anatomy and implant positioning, the iliac crest is the preferred model over the femoral condyle model. The iliac crest implantation model is suitable for evaluation of the osteogenic response to bone implant materials and represents a justified and deliberate alternative to the already existing animal models.

  2. Variations in crestal cortical bone thickness at dental implant sites in different regions of the jawbone.

    Science.gov (United States)

    Ko, Yi-Chun; Huang, Heng-Li; Shen, Yen-Wen; Cai, Jyun-Yi; Fuh, Lih-Jyh; Hsu, Jui-Ting

    2017-06-01

    Dental implants have become reliable and predictable tools for treating missing teeth. The survival rate of dental implants is markedly influenced by the host bone quality and quantity of the jawbone. A better host bone provides higher initial stability of the dental implant, resulting in better osseointegration and a higher success rate. Host bone quality and quantity are determined by the crestal cortical bone thickness and inner cancellous bone density. The purpose of this study was to determine the crestal cortical bone thickness at dental implant sites in different regions of the jawbone through the use of dental cone-beam computed tomographic (CBCT) images. A total of 661 dental implant sites (81 in the anterior mandible, 122 in the anterior maxilla, 224 in the posterior mandible, and 234 in the posterior maxilla) were obtained from the jawbones of 173 humans. The data were subjected to statistical analysis to determine any correlation between crestal cortical bone thicknesses and jawbone regions using one-way analysis of variance with Tukey's post-test. The crestal cortical bone thicknesses at dental implant sites in the four regions decreased in the following order: posterior mandible (1.07 ± 0.47 mm, mean ± SD) >anterior mandible (0.99 ± 0.36 mm) >anterior maxilla (0.82 ± 0.30 mm) >posterior maxilla (0.75 ± 0.35 mm). The dental CBCT data demonstrate that crestal cortical bone thickness varies markedly between dental implant sites in the four regions of the jawbone. © 2017 Wiley Periodicals, Inc.

  3. ToF-SIMS Investigations on Dental Implant Materials and Adsorbed Protein Films

    OpenAIRE

    Bernsmann, Falk

    2007-01-01

    95 pages; In this work the two experimental dental implant materials FAT and FAW, made of fluoroapatite particles embedded in polymer matrices, and films of the proteins lysozyme, amylase and bovine serum albumin (BSA), adsorbed to the two dental implant materials, were investigated with time-of-flight secondary ion mass spectrometry (ToF-SIMS) and the multivariate data analysis technique discriminant principal component analysis (DPCA).

  4. Design improvement and dynamic finite element analysis of novel ITI dental implant under dynamic chewing loads.

    Science.gov (United States)

    Cheng, Yung-Chang; Lin, Deng-Huei; Jiang, Cho-Pei; Lee, Shyh-Yuan

    2015-01-01

    The main aim of this article was to introduce the application of a uniform design for experimental methods to drop the micromotion of a novel ITI dental implant model under the dynamic loads. Combining the characteristics of the traditional ITI and Nano-Tite implants, a new implant with concave holes has been constructed. Compared to the traditional ITI dental implant model, the micromotion of the new dental implant model was significantly reduced by explicit dynamic finite element analysis. From uniform design of experiments, the dynamic finite element analysis method was applied to caluculated the maximum micromotion of the full model. Finally, the chief design in all the experiment simulations which cause the minimum micromotion is picked as the advanced model of the design. Related to the original design, which was associated with a micromotion of 45.11 μm, the micromotion of the improved version was 31.37 μm, for an improvement rate of 30.5%.

  5. Dental implant survival in irradiated oral cancer patients: a systematic review of the literature.

    Science.gov (United States)

    Nooh, Nasser

    2013-01-01

    Oral cancer therapy with surgery and radiation is associated with comorbidities; this affects rehabilitation with osseointegrated dental implants. The aim of this systematic review was to evaluate the effect of radiation therapy on osseointegrated dental implant survival in oral cancer patients. A review of the literature published between 1990 and June 2012 was conducted. Pertinent studies evaluating the effect of radiation therapy on osseointegration of implants were identified through searches of PubMed, SCIRUS, and Google Scholar. Overall implant survival rates were compared with respect to timing of radiation (prior to or after implantation), site of implant placement (maxilla, mandible, vascularized free flaps, nonvascular bone grafts), radiation dose, time interval between radiation therapy and implant placement, and the effect of hyperbaric oxygen therapy. Thirty-eight articles were eligible for inclusion in the review. Overall implant survival rates with radiation therapy done pre- and postimplantation were 88.9% and 92.2%, respectively. In preimplantation radiation therapy, the implant survival rate was significantly higher for the mandible (93.3%) than for the maxilla (78.9%) or for grafted bone (87.5%). Similarly, the implant survival rate was higher when implants were placed in free flaps (89.3%) than in nonvascularized bone grafts (81.7%). While a radiation dose above 55 Gy significantly decreased implant survival, no significant relationship between increased implant survival and the remaining variables were found. There, was no significant difference in dental implant survival rates between preimplantation and postimplantation radiation therapy. The anatomical site of implant placement in preimplantation radiation therapy was the most pertinent variable affecting implant survival, with a better survival rate in the mandible compared to the maxilla and grafted bone.

  6. The Risk Factors in Early Failure of Dental Implants: a Retrospective Study

    Science.gov (United States)

    Mohajerani, Hassan; Roozbayani, Roozbeh; Taherian, Shahram; Tabrizi, Reza

    2017-01-01

    Statement of the Problem: Despite the low failure rate of dental implants, recognition of the risk factors can enhance the predictability of failure. Purpose: The aim of this study was to evaluate the risk factors for early implant failure. Materials and Method: This retrospective cohort study was conducted on two groups of patients, the patients with a failed implant before loading and those without a failed implant. Age, gender, implant type, implant surface, implant length, bone type, type of surgery (one- or two-stage) and immediate (fresh socket) or delayed placement of implant were the variables to be assessed in this study. Results: Out of the 1,093 evaluated implants, 73 cases (6.68%) failed in early stages. The two groups were significantly different in terms of implant surface, fresh socket placement, prophylactic use of antibiotics, and bone density (pimplant height, implant type (cylindrical or tapered) and one-stage or two-stage placement were not significantly different between the two groups (p> 0.05). Conclusion: It seems that prophylactic antibiotic therapy, implant surface, bone density and placement in fresh extraction socket may contribute to dental implant failure. PMID:29201974

  7. Evaluation of bone loss in antibacterial coated dental implants: An experimental study in dogs.

    Science.gov (United States)

    Godoy-Gallardo, Maria; Manzanares-Céspedes, Maria Cristina; Sevilla, Pablo; Nart, José; Manzanares, Norberto; Manero, José M; Gil, Francisco Javier; Boyd, Steven K; Rodríguez, Daniel

    2016-12-01

    The aim of this study was to evaluate the in vivo effect of antibacterial modified dental implants in the first stages of peri-implantitis. Thirty dental implants were inserted in the mandibular premolar sites of 5 beagle dogs. Sites were randomly assigned to Ti (untreated implants, 10units), Ti_Ag (silver electrodeposition treatment, 10units), and Ti_TSP (silanization treatment, 10units). Coated implants were characterized by scanning electron microscopy, interferometry and X-ray photoelectron spectroscopy. Two months after implant insertion, experimental peri-implantitis was initiated by ligature placement. Ligatures were removed 2months later, and plaque formation was allowed for 2 additional months. Clinical and radiographic analyses were performed during the study. Implant-tissue samples were prepared for micro computed tomography, backscattered scanning electron microscopy, histomorphometric and histological analyses and ion release measurements. X-ray, SEM and histology images showed that vertical bone resorption in treated implants was lower than in the control group (Pimplant surface. Histological analysis suggested an increase of peri-implant bone formation on silanized implants. However, the short post-ligature period was not enough to detect differences in clinical parameters among implant groups. Within the limits of this study, antibacterial surface treatments have a positive effect against bone resorption induced by peri-implantitis. Copyright © 2016 Elsevier B.V. All rights reserved.

  8. Effect on Bone Architecture of Marginal Grooves in Dental Implants Under Occlusal Loaded Conditions in Beagle Dogs.

    Science.gov (United States)

    Kato, Hatsumi; Kuroshima, Shinichiro; Inaba, Nao; Uto, Yusuke; Sawase, Takashi

    2018-02-01

    The aim of this study was to clarify whether marginal grooves on dental implants affect osseointegration, bone structure, and the alignment of collagen fibers to determine bone quality under loaded conditions. Anodized Ti-6Al-4V alloy dental implants, with and without marginal grooves (test and control implants, respectively), were used (3.7 × 8.0 mm). Fourth premolars and first molars of 6 beagle mandibles were extracted. Two control and test implants were placed in randomly selected healed sites at 12 weeks after tooth extraction. Screw-retained single crowns for first molars were fabricated. Euthanasia was performed at 8 weeks after the application of occlusal forces. Implant marginal bone level, bone to implant contact (BIC), bone structure around dental implants, and the alignment of collagen fibers determining bone quality were analyzed. The marginal bone level in test implants was significantly higher than that in control implants. Occlusal forces significantly increased BIC in test implants ( P = .007), whereas BIC did not change in control implants, irrespective of occlusal forces ( P = .303). Moreover, occlusal forces significantly increased BIC in test implants compared with control implants ( P = .032). Additionally, occlusal forces preferentially aligned collagen fibers in test implants, but not control implants. Hence, marginal grooves on dental implants have positive effects on increased osseointegration and adapted bone quality based on the preferential alignment of collagen fibers around dental implants under loaded conditions.

  9. Selective serotonin reuptake inhibitors and dental implant failure-A significant concern in elders?

    Science.gov (United States)

    Gupta, Bhumija; Acharya, Aneesha; Pelekos, Georgios; Gopalakrishnan, Dharmarajan; Kolokythas, Antonia

    2017-12-01

    Depression is a significantly prevalent health concern in geriatric populations. Selective serotonin reuptake inhibitor drugs (SSRI) are the most commonly prescribed antidepressant agents, with increasing rates of prescription. The present report aimed to present a concise review of the current understanding regarding SSRI effects on bone and dental implant outcomes. A broad-based review and summary of literature pertaining to the effects of SSRI on bone metabolism and on dental implant survival was performed. The available literature indicates that serotonin plays a significant role in bone metabolism and experimental reports demonstrate adverse impacts of SSRI on multiple pathways of bone metabolism. Early clinical reports suggest detrimental effects of SSRI on dental implant survival. The type of SSRI drug, dosage and host-related genetic and metabolic factors could be potential modulating factors. There is a paucity of data regarding SSRI usage and dental implant survival specific to geriatric cohorts. As older individuals comprise a high-risk group for both high oral rehabilitation and SSRI use, clinicians should be aware the potential association between SSRI and dental implant failures. Well-designed investigations specific to geriatric cohorts are essential to understand the implications of SSRI use on dental implant prognosis. © 2017 John Wiley & Sons A/S and The Gerodontology Association. Published by John Wiley & Sons Ltd.

  10. In situ microradioscopy and microtomography of fatigue-loaded dental two-piece implants.

    Science.gov (United States)

    Wiest, Wolfram; Zabler, Simon; Rack, Alexander; Fella, Christian; Balles, Andreas; Nelson, Katja; Schmelzeisen, Rainer; Hanke, Randolf

    2015-11-01

    Synchrotron real-time radioscopy and in situ microtomography are the only techniques providing direct visible information on a micrometre scale of local deformation in the implant-abutment connection (IAC) during and after cyclic loading. The microgap formation at the IAC has been subject to a number of studies as it has been proposed to be associated with long-term implant success. The next step in this scientific development is to focus on the in situ fatigue procedure of two-component dental implants. Therefore, an apparatus has been developed which is optimized for the in situ fatigue analysis of dental implants. This report demonstrates both the capability of in situ radioscopy and microtomography at the ID19 beamline for the study of cyclic deformation in dental implants. The first results show that it is possible to visualize fatigue loading of dental implants in real-time radioscopy in addition to the in situ fatigue tomography. For the latter, in situ microtomography is applied during the cyclic loading cycles in order to visualize the opening of the IAC microgap. These results concur with previous ex situ studies on similar systems. The setup allows for easily increasing the bending force, to simulate different chewing situations, and is, therefore, a versatile tool for examining the fatigue processes of dental implants and possibly other specimens.

  11. Reactive lesions of peri-implant mucosa associated with titanium dental implants: a report of 2 cases.

    Science.gov (United States)

    Olmedo, D G; Paparella, M L; Brandizzi, D; Cabrini, R L

    2010-05-01

    The aim of this study was to report 2 novel clinical cases of reactive lesions of the peri-implant mucosa associated with titanium dental implants where metal-like particles were observed histologically. In both cases, the lesions were diagnosed as epulis, based on clinical evidence. Extirpation biopsies were carried out. Case 1 was diagnosed as pyogenic granuloma and case 2 as peripheral giant cell granuloma. The presence of metal-like particles in the tissues suggests that the etiology of the lesions might be related to the corrosion process of the metal structure. This is the first case of pyogenic granuloma to be reported in association with dental implants. All clinical cases of soft tissue lesions associated with implants should be reported to contribute to the understanding of the etiology and pathogeny of these lesions. Copyright 2009 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  12. Nano-crystalline diamond-coated titanium dental implants - a histomorphometric study in adult domestic pigs.

    Science.gov (United States)

    Metzler, Philipp; von Wilmowsky, Cornelius; Stadlinger, Bernd; Zemann, Wolfgang; Schlegel, Karl Andreas; Rosiwal, Stephan; Rupprecht, Stephan

    2013-09-01

    Promising biomaterial characteristics of diamond-coatings in biomedicine have been described in the literature. However, there is a lack of knowledge about implant osseointegration of this surface modification compared to the currently used sandblasted acid-etched Ti-Al6-V4 implants. The aim of this study was to investigate the osseointegration of microwave plasma-chemical-vapour deposition (MWP-CVD) diamond-coated Ti-Al6-V4 dental implants after healing periods of 2 and 5 months. Twenty-four MWP-CVD diamond-coated and 24 un-coated dental titanium-alloy implants (Ankylos(®)) were placed in the frontal skull of eight adult domestic pigs. To evaluate the effects of the nano-structured surfaces on bone formation, a histomorphometric analysis was performed after 2 and 5 months of implant healing. Histomorphometry analysed the bone-to-implant contact (BIC). No significant difference in BIC for the diamond-coated implants in comparison to reference implants could be observed for both healing periods. Scanning electron microscopy revealed an adequate interface between the bone and the diamond surface. No delamination or particle-dissociation due to shearing forces could be detected. In this study, diamond-coated dental titanium-alloy implants and sandblasted acid-etched implants showed a comparable degree of osseointegration. Copyright © 2012 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  13. Bruxism and dental implant failures: a multilevel mixed effects parametric survival analysis approach.

    Science.gov (United States)

    Chrcanovic, B R; Kisch, J; Albrektsson, T; Wennerberg, A

    2016-11-01

    Recent studies have suggested that the insertion of dental implants in patients being diagnosed with bruxism negatively affected the implant failure rates. The aim of the present study was to investigate the association between the bruxism and the risk of dental implant failure. This retrospective study is based on 2670 patients who received 10 096 implants at one specialist clinic. Implant- and patient-related data were collected. Descriptive statistics were used to describe the patients and implants. Multilevel mixed effects parametric survival analysis was used to test the association between bruxism and risk of implant failure adjusting for several potential confounders. Criteria from a recent international consensus (Lobbezoo et al., J Oral Rehabil, 40, 2013, 2) and from the International Classification of Sleep Disorders (International classification of sleep disorders, revised: diagnostic and coding manual, American Academy of Sleep Medicine, Chicago, 2014) were used to define and diagnose the condition. The number of implants with information available for all variables totalled 3549, placed in 994 patients, with 179 implants reported as failures. The implant failure rates were 13·0% (24/185) for bruxers and 4·6% (155/3364) for non-bruxers (P bruxism was a statistically significantly risk factor to implant failure (HR 3·396; 95% CI 1·314, 8·777; P = 0·012), as well as implant length, implant diameter, implant surface, bone quantity D in relation to quantity A, bone quality 4 in relation to quality 1 (Lekholm and Zarb classification), smoking and the intake of proton pump inhibitors. It is suggested that the bruxism may be associated with an increased risk of dental implant failure. © 2016 John Wiley & Sons Ltd.

  14. A novel dual material mouthguard for patients with dental implants.

    Science.gov (United States)

    Miyahara, Takayuki; Dahlin, Christer; Galli, Silvia; Parsafar, Shima; Koizumi, Hiroyasu; Kasugai, Shohei

    2013-08-01

    Dental implant-supported reconstructions demonstrate significantly less physiological flexibility for loading and traumatic forces compared with a normal dentition because of their rigid integration with the adjacent bone. Ethylene vinyl acetate (EVA) material has become widely accepted as a mouthguard material; however, many studies indicate the necessity of improving the impact absorption ability by considering the design and developing new materials. The aim of this study was to compare the shock-absorbing ability of a novel dual component material comprising EVA and porous rubber with that of EVA alone. Three groups of samples were tested: Group 1 = EVA (thickness, 4 mm), Group 2 = type 1 material (2-mm thick porous rubber sheet sandwiched between two sheets of 1-mm thick EVA sheets), and Group 3 = type 2 material (1-mm thick porous rubber sheet sandwiched between EVA sheets with 1 and 2-mm thickness, respectively). Shock absorption was determined by means of a hammer impact testing device equipped with strain gauge, accelerator, and load cell. The value of shock-absorbing ability of group 2 (40.6 ± 12.5%) was significantly higher than those of group 1 (15.6 ± 2.1%) and group 3 (21.2 ± 9.2%). The material with thicker rubber sheet showed significantly higher shock-absorbing ability compared with that of the material with thinner rubber sheet. The novel dual material was superior to conventional EVA material in shock-absorbing ability depending on the thickness of porous rubber, and it may be potentially effective as mouthguard material, in particular, for patients wearing implant-supported constructions. © 2012 John Wiley & Sons A/S.

  15. Multifunctions of dual Zn/Mg ion co-implanted titanium on osteogenesis, angiogenesis and bacteria inhibition for dental implants.

    Science.gov (United States)

    Yu, Yiqiang; Jin, Guodong; Xue, Yang; Wang, Donghui; Liu, Xuanyong; Sun, Jiao

    2017-02-01

    In order to improve the osseointegration and long-term survival of dental implants, it is urgent to develop a multifunctional titanium surface which would simultaneously have osteogeneic, angiogeneic and antibacterial properties. In this study, a potential dental implant material-dual Zn/Mg ion co-implanted titanium (Zn/Mg-PIII) was developed via plasma immersion ion implantation (PIII). The Zn/Mg-PIII surfaces were found to promote initial adhesion and spreading of rat bone marrow mesenchymal stem cells (rBMSCs) via the upregulation of the gene expression of integrin α1 and integrin β1. More importantly, it was revealed that Zn/Mg-PIII could increase Zn 2+ and Mg 2+ concentrations in rBMSCs by promoting the influx of Zn 2+ and Mg 2+ and inhibiting the outflow of Zn 2+ , and then could enhance the transcription of Runx2 and the expression of ALP and OCN. Meanwhile, Mg 2+ ions from Zn/Mg-PIII increased Mg 2+ influx by upregulating the expression of MagT1 transporter in human umbilical vein endothelial cells (HUVECs), and then stimulated the transcription of VEGF and KDR via activation of hypoxia inducing factor (HIF)-1α, thus inducing angiogenesis. In addition to this, it was discovered that zinc in Zn/Mg-PIII had certain inhibitory effects on oral anaerobic bacteria (Pg, Fn and Sm). Finally, the Zn/Mg-PIII implants were implanted in rabbit femurs for 4 and 12weeks with Zn-PIII, Mg-PIII and pure titanium as controls. Micro-CT evaluation, sequential fluorescent labeling, histological analysis and push-out test consistently demonstrated that Zn/Mg-PIII implants exhibit superior capacities for enhancing bone formation, angiogenesis and osseointegration, while consequently increasing the bonding strength at bone-implant interfaces. All these results suggest that due to the multiple functions co-produced by zinc and magnesium, rapid osseointegration and sustained biomechanical stability are enhanced by the novel Zn/Mg-PIII implants, which have the potential

  16. Prognosis of implants and abutment teeth under combined tooth-implant-supported and solely implant-supported double-crown-retained removable dental prostheses.

    Science.gov (United States)

    Rammelsberg, Peter; Bernhart, Gunda; Lorenzo Bermejo, Justo; Schmitter, Marc; Schwarz, Stefanie

    2014-07-01

    Objective of this study was to evaluate the incidence of complications in dental implants and abutment teeth used for combined tooth-implant- and solely implant-supported double crown-retained removable dental prostheses (RDPs). Patients were selected from a prospective clinical study. Seventy-three RDPs retained by 234 implants and 107 abutment teeth were placed in 39 men and 22 women with a mean age of 65 years. Forty-five RDPs were located in the maxilla and 28 in the mandible. Thirty-four RDPs were solely implant-supported and 39 were combined tooth-implant-supported. Kaplan-Meier analysis was used to estimate success defined as survival without severe abutment-related complications, and Cox regression was used to isolate the most relevant prognostic risk factors. After a median observation period of 2.7 years for the RDPs, six implants failed and eleven implants were diagnosed with peri-implantitis. Four abutment teeth were extracted, and three abutment teeth showed severe complications requiring extended interventions. For both abutment teeth and implants, Kaplan-Meier analyses revealed a 5-year probability of success of 85% for solely implant-supported RDPs and 92% for combined tooth-implant-supported RDPs. Multiple Cox regression identified RDP location (P = 0.01), age (P = 0.01), and gender (P = 0.04) as prognostic risk factors for severe implant-related complications. Solely implant-supported RPDs showed a poorer prognosis, but the risk difference did not reach statistical significance. Preliminary data suggest that the combination of teeth and implants to support double crown-retained RDPs may result in a prognostic advantage. The present findings should be validated in independent studies. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  17. Assessment of metal artifact reduction around dental titanium implants in cone beam CT

    NARCIS (Netherlands)

    Parsa, A.; Ibrahim, N.; Hassan, B.; Syriopoulos, K.; van der Stelt, P.

    2014-01-01

    Objectives: The aim of this study was to investigate if the metal artefact reduction (MAR) tool used in the software of the ORTHOPANTOMOGRAPH® OP300 (Instrumentarium Dental, Tuusula, Finland) can improve the gray value levels in post-operative implant scans. Methods: 20 potential implant sites were

  18. Associations of Resonance Frequency Analysis with Dynamic Mechanical Analysis of Dental Implant Systems.

    Science.gov (United States)

    Kim, Do-Gyoon; Kwon, Hyun-Jung; Jeong, Yong-Hoon; Chien, Hua-Hong; Crance, Samantha; Agnew, Amanda M; Battula, Suneel; Lee, Jin Whan; Wen, Hai Bo

    2016-04-01

    Resonance frequency analysis (RFA) has been introduced as a noninvasive method to clinically estimate the stability of dental implant systems. The objective of this study was to examine whether implant stability quotient (ISQ) values of RFA can account for mechanical stability of the dental implant system, which is assessed using dynamic mechanical analysis (DMA). Fifty-seven screw-type titanium dental implants were placed in artificial polyurethane foams with seven different thicknesses (3.5 to 12 mm) and eight edentulous mandibles of human cadavers (four men and four women, 79.11 ± 13.48 years). After the ISQ values, insertion torque, and static stiffness of each implant system were measured, the DMA was performed to assess dynamic stiffness and viscoelastic tan δ. The ISQ value had strong positive correlations with thickness, insertion torque, static and dynamic stiffness, and a negative correlation with tan δ of implant systems in artificial bone blocks (r = 0.769 to 0.992, p implant systems in human mandibles (p dental implant system under the controlled condition of homogeneous density in simple dimensions. © 2015 Wiley Periodicals, Inc.

  19. Mandibular Overdentures Supported by 6-mm Dental Implants : A 1-Year Prospective Cohort Study

    NARCIS (Netherlands)

    Gulje, Felix; Raghoebar, Gerry M.; Ter Meulen, Jan-Willem P.; Vissink, Arjan; Meijer, Henny J. A.; Guljé, Felix

    Background: The extremely resorbed edentulous mandible, with a bone height of 8 mm or less, is still a challenge in implant dentistry. Recently, dental implants of 6 mm in length have been developed. Purpose: The purpose of this 1-year prospective cohort study was to evaluate treatment outcome of

  20. Clinical study on the primary stability of two dental implant systems with resonance frequency analysis.

    Science.gov (United States)

    Rabel, Annette; Köhler, Steffen Gerhard; Schmidt-Westhausen, Andrea Maria

    2007-09-01

    Primary stability has a major impact on the long-term success of dental implants. The aim of this study was to investigate the correlation of resonance frequency analysis (RFA) and insertion torque of self-tapping and non-self-tapping implants and their respective differences in primary stability. A group of 263 patients were treated with a total of 602 conically formed dental implants: 408 non-self-tapping Ankylos and 194 self-tapping Camlog. The maximum insertion torque during implant placement was recorded. Resonance frequency, measured as the implant stability quotient (ISQ), was assessed once immediately after insertion and twice 3 months later. Torque values of the non-self-tapping implants were significantly higher than those in the self-tapping group (p = 0.023). RFA did not show differences between the 2 groups (p = 0.956), but a correlation between ISQ values after implantation and 3 months after implant placement was measured (r = 0.712). Within the implant systems, no correlation between insertion torque and resonance frequency values could be determined (r = 0.305). Our study indicates that the ISQ values obtained from different implant systems are not comparable. The RFA does not appear suitable for the evaluation of implant stability when used as a single method. Higher insertion torque of the non-self-tapping implants appeared to confirm higher clinical primary stability.

  1. Progressive immediate loading of a perforated maxillary sinus dental implant: a case report

    Directory of Open Access Journals (Sweden)

    Al-Juboori MJ

    2015-01-01

    Full Text Available Mohammed Jasim Al-Juboori Department of Oral Surgery, MAHSA University, Kuala Lumpur, Malaysia Abstract: The displacement of a dental implant into the maxillary sinus may lead to implant failure due to exposure of the apical third or the tip of the implant beyond the bone, resulting in soft tissue growth. This case report discusses dental implant placement in the upper first molar area with maxillary sinus involvement of approximately 2 mm. A new technique for progressive implant loading was used, involving immediately loaded implants with maxillary sinus perforation and low primary stability. Follow-up was performed with resonance frequency analysis and compared with an implant placed adjacent in the upper second premolar area using a conventional delayed loading protocol. Implants with maxillary sinus involvement showed increasing stability during the healing period. We found that progressive implant loading may be a safe technique for the placement of immediately loaded implants with maxillary sinus involvement. Keywords: progressive implant loading, resonance frequency analysis, implant stability, provisional crown, bone density, maxillary sinus

  2. [Experimental study of dental implants with nanostructured non-resorbable coating integration into bone tissue].

    Science.gov (United States)

    Grigor'ian, A S; Khamraev, T K; Toporkova, A K; Amirov, A R

    2010-01-01

    In 2 dogs on both sides of mandible premolars were removed. In 3 months after dental alveolus healing intraosseous screwdriver dental implants (Konmet, Russia) were installed in the place of the removed teeth. Analogous operation was done on the contralateral side: the same type of implants were installed but with new nanostructured multifunctional biocompatible non-resorbable coating (MBNC) of the Ti-Ca-P-C-O-N composition. The animals were taken out of the experiment in 4 months after implants installation and implant-bone blocks were studied by SEM-method. According to the SEM-data in the region of the contact of implant-bone without new MBNC only fibrous connective tissue was formed. In case when MBNC was used the close welding of bone tissue with implant surface was observed that was considered as sign of osteointegration.

  3. Rehabilitation of Posterior Maxilla with Zygomatic and Dental Implant after Tumor Resection: A Case Report

    Directory of Open Access Journals (Sweden)

    Faysal Ugurlu

    2013-01-01

    Full Text Available Zygomatic implants have been used for dental rehabilitation in patients with insufficient bone in the posterior upper jaw, due to, for example, tumor resection, trauma, or atrophy. Zygomatic implants are an alternative to complex free or vascularized bone grafting and distraction osteogenesis. A 42-year-old male patient with a severe defect in the right posterior maxilla, starting from the first canine region, which had occurred after tumor resection 3 years earlier, was referred to our department. One zygomatic implant (Brenemark System, Nobel Biocare, Goteborg, Sweden to the zygoma and one dental implant to the canine region were placed. After a 5-month osseointegration period, a fixed denture was fabricated and adapted to the implants. Although the surgical and prosthetic procedures for zygoma implants are not easy, the final outcomes can be successful with appropriate planning.

  4. Dental implants in irradiated versus nonirradiated patients: A meta-analysis.

    Science.gov (United States)

    Chrcanovic, Bruno Ramos; Albrektsson, Tomas; Wennerberg, Ann

    2016-03-01

    The purpose of the present meta-analysis was to test the null hypothesis of no difference in dental implant failure rates, postoperative infection, and marginal bone loss for patients being rehabilitated by dental implants and being previously irradiated in the head and neck region versus nonirradiated patients against the alternative hypothesis of a difference. The study suggests that irradiation negatively affects the survival of implants, as well as the difference in implant location (maxilla vs mandible), but there is no statistically significant difference in survival when implants are inserted before or after 12 months after radiotherapy. The study failed to support the effectiveness of hyperbaric oxygen therapy in irradiated patients. It was observed that there was a tendency of lower survival rates of implants inserted in the patients submitted to higher irradiation doses. The results should be interpreted with caution because of the presence of uncontrolled confounding factors in the included studies. © 2015 Wiley Periodicals, Inc.

  5. Implant-Site Related and Patient-Based Factors With the Potential to Impact Patients' Satisfaction, Quality of Life Measures and Perceptions Toward Dental Implant Treatment.

    Science.gov (United States)

    Topçu, Ali Orkun; Yamalik, Nermin; Güncü, Güliz N; Tözüm, Tolga F; El, Hakan; Uysal, Serdar; Hersek, Nur

    2017-08-01

    The present study aimed at evaluating both the implant site-related and patient-based factors with the potential to affect the extent of patients' satisfaction and also their perceptions regarding dental implant treatment. Potential differences between the esthetic evaluations of dental patients and dental specialists were also considered. Implant-supported fixed prosthesis (n = 164) in 264 anterior esthetic implant sites were included. Patients' satisfaction, esthetic considerations, and perceptions toward dental implants, were evaluated by both Oral Health Impact Profile-14 (OHIP-14) questionnaire and visual analog scale. Pink Esthetic Score/White Esthetic Score were used for the professional esthetic evaluations of dental specialists. Overall patient satisfaction was high (87.42 ± 11.86). Compared with implant supported single-tooth restorations, patients with implant-supported bridges had lower OHIP scores (P = 0.001) and were relatively less satisfied with particular aspects of dental implant treatment (eg, cleanability, phonetics, surgical discomfort, and pretreatment information). Generally, type of prosthesis, history of soft/hard tissue augmentation, and reason for tooth loss had a clear impact on the extent of patients' satisfaction, esthetic considerations regarding treatment outcome, and their perceptions toward dental implant treatment (P implant-supported restorations generally provide with high levels of satisfaction and oral health-related quality of life.

  6. Electrochemical disinfection of dental implants--a proof of concept

    National Research Council Canada - National Science Library

    Mohn, Dirk; Zehnder, Matthias; Stark, Wendelin J; Imfeld, Thomas

    2011-01-01

    .... An unexpected approach to implant disinfection may evolve from electrolysis. Given the electrical conductivity of titanium implants, alkalinity or active oxidants can be generated in body fluids...

  7. Perioperative use of non-steroidal anti-inflammatory drugs might impair dental implant osseointegration.

    Science.gov (United States)

    Winnett, Brent; Tenenbaum, Howard C; Ganss, Ben; Jokstad, Asbjørn

    2016-02-01

    To appraise whether adverse biological events following oral implant placement may be associated with perioperative use of non-steroidal anti-inflammatory drugs (NSAIDs). All patients treated in a university faculty postgraduate dental clinic between 1979 and 2012 that had experienced a failing and surgically removed dental implant (292 implants in 168 patients) were contacted to solicit additional information about their present dental and medical status and frequency of current and past use of NSAIDs. Potential associations between perioperative NSAIDs use and the occurrence of adverse biological events were explored by the use of 2 × 2 tables and two-tailed Fisher's exact tests. One hundred and four patients with initially 468 implants had experienced 238 implant failures, of which 197 were due to failing osseointegration (42%). Sixty of the participants, initially with 273 implants, had used NSAIDs perioperatively and experienced 44% implant failures, versus 38% in the non-NSAID cohort. The NSAID cohort experienced 3.2 times more cases of radiographic bone loss greater than 30% of the vertical height of their remaining implants and 1.9 times more cases of cluster failures, defined as failure of 50% or more of the implant(s) placed. Notwithstanding that a retrospective study design is open to potential bias, the current data indicate that dental implant osseointegration may be affected negatively by an inhibitory effect of NSAIDs on bone healing in vulnerable patients. Future and better clinical studies than the current should be designed to appraise more precisely the potential effects of NSAIDs on implant osseointegration in study populations that are not limited by stringent medical inclusion and exclusion criteria. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  8. Desarrollo de recubrimientos híbridos osteoinductores para implantes dentales

    OpenAIRE

    Hernández Escolano, Miriam

    2012-01-01

    En la actualidad, en el desarrollo de implantes metálicos y, en particular el de los dentales, se necesitan métodos innovadores que permitan desarrollar nuevos procesos y materiales con mayor velocidad de osteointegración, para conseguir una unión hueso-implante óptima en todo tipo de pacientes, incluso en aquellos donde el uso de implantes dentales se desaconseja por tener mermada la capacidad para la regeneración ósea. El titanio y algunas de sus aleaciones son materiales reconocidos ...

  9. Immediate versus early loading of flapless placed dental implants: a systematic review.

    Science.gov (United States)

    Xu, Lin; Wang, Xiaodong; Zhang, Qin; Yang, Wen; Zhu, Wenjun; Zhao, Ke

    2014-10-01

    The flapless implant technique is a predictable procedure with several advantages and a high overall implant survival rate. Immediate loading and early loading have been widely used in dental implant therapies and provide improved esthetics, with enhanced function and comfort. However, the scientific support for immediate or early loading approaches for flapless-placed dental implants is unclear. The purpose of this systematic review was to assess the effectiveness and safety of the immediate versus early loading of dental implants with flapless placement. The Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, CNKI database, VIP database, WANFANG Database, and World Health Organization International Clinical Trials Registry Platform Search Portal were searched (up to October 2012). The systematic review included clinical randomized controlled trials that compared immediate with early loading of flapless-placed dental implants to replace missing teeth in adult participants who were partially or completely edentulous. The selection of included studies, data extraction, and assessment of the quality of the studies and evidence were conducted independently by 2 reviewers. Six articles that reported on 4 randomized controlled trials that involved 180 selected participants were included. The implant failure rate was from 0.0% to 3.3% in both immediate and early loading groups with flapless implantation. No statistically significant differences were found in implant failure rates, periimplant marginal bone-level changes, or complications between the 2 groups. More participants preferred immediate loading rather than waiting for nearly 2 months. Within the limitation of needing additional high-quality evidence, immediate and early loading of dental implants after flapless placement both demonstrated an acceptable short- to medium-term survival rate. Immediate loading seems more acceptable because of the time benefit. Copyright © 2014 Editorial Council for

  10. The effects of laser microtexturing of the dental implant collar on crestal bone levels and peri-implant health.

    Science.gov (United States)

    Botos, Spyros; Yousef, Hoda; Zweig, Barry; Flinton, Robert; Weiner, Saul

    2011-01-01

    Polished and machined collars have been advocated for dental implants to reduce plaque accumulation and crestal bone loss. More recent research has suggested that a roughened titanium surface promotes osseointegration and connective tissue attachment. The purpose of this research was to compare crestal bone height adjacent to implants with laser-microtextured and machined collars from two different implant systems. Four implants, two with laser-microtextured collars and two with machined collars, were placed in the anterior mandible to serve as overdenture abutments. They were placed in alternating order, and the distal microtextured- and machined-collar implants were loaded with ball abutments. The mesial implants were left unloaded. The distal implants were immediately loaded with prefabricated dentures. Plaque Index, Bleeding Index, and probing depths (PDs) were measured after 6 and 12 months for the loaded implants. Bone loss for both groups (loaded and unloaded) was evaluated via standardized radiographs. Plaque and bleeding values were similar for both implant types. The microtextured-collar implants showed shallower PDs (0.36 ± 0.5 mm and 0.43 ± 0.51 mm) than those with machined collars (1.14 ± 0.77 mm and 1.64 ± 0.93 mm; bone loss for both loaded (0.19 ± 0.15 mm and 0.42 ± 0.34 mm) and unloaded groups (0.15 ± 0.15 mm and 0.29 ± 0.20 mm) than the machined implants for both the loaded (0.72 ± 0.5 mm and 1.13 ± 0.61 mm) and unloaded groups (0.29 ± 0.28 mm and 0.55 ± 0.32 mm). Application of laser-microtextured grooves to the implant collar resulted in shallower PDs and less peri-implant crestal bone loss than that seen around implants with machined collars.

  11. Dental Implants With Immediate Loading Using Insertion Torque of 30 Ncm: A Systematic Review.

    Science.gov (United States)

    Douglas de Oliveira, Dhelfeson Willya; Lages, Frederico Santos; Lanza, Leonardo Avellar; Gomes, Alex Martins; Queiroz, Thallita Pereira; Costa, Fernando de Oliveira

    2016-10-01

    This study aimed to perform a review of the literature regarding the survival rate of dental implants with immediate loading using insertion torque of 30 Ncm. A systematic review was performed based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses and the Cochrane Handbook for Systematic Reviews of Interventions (PROSPERO CRD42014015323). The search was performed in the PubMed, Web of Science, Cochrane Library electronic, OVID, and Scielo databases. Manual searches were also performed. The articles identified were assessed independently by 3 researchers. Clinical trials reporting dental implants with immediate loading and 30 Ncm torque in patients ages 18 years or older were included. The searches yielded 589 studies. Six studies were included in the systematic review. The survival rate of dental implants was 96.8%. Three studies showed a low potential risk of bias. There is not strong evidence that insertion torque of 30 Ncm is enough for implant survival in cases of immediate loading.

  12. To what extent should dental implant placement be adopted as a standard for diabetic patients?

    Science.gov (United States)

    Alzahrani, Ahmed S.; Abed, Hassan H.

    2016-01-01

    Diabetes mellitus (DM) is considered one of the major chronic diseases in the world. Long-term hyperglycemia considerably affects the body tissues, and consequently, can lead to morbidity and mortality. Moreover, many oral complications have been observed with DM but little consideration in relation to the placement of dental implants has been investigated. Dental research has analyzed the relation of dental implants and bone osseointegration in diabetic patients. Theoretically, an impaired immune system and delayed wound healing of these patients might decrease the success rate of implant placement; however, with noticeable advances in evidence-based dentistry and statistically significant results, successful implant treatment could be achieved significantly in well-controlled diabetic patients. PMID:27761554

  13. In vivo osseointegration of dental implants with an antimicrobial peptide coating.

    Science.gov (United States)

    Chen, X; Zhou, X C; Liu, S; Wu, R F; Aparicio, C; Wu, J Y

    2017-05-01

    This study aimed to evaluate the in vivo osseointegration of implants with hydrophobic antimicrobial GL13K-peptide coating in rabbit femoral condyles by micro-CT and histological analysis. Six male Japanese Rabbits (4 months old and weighing 2.5 kg each) were included in this study. Twelve implants (3.75 mm wide, 7 mm long) were randomly distributed in two groups, with six implants in the experimental group coated with GL13K peptide and six implants in the control group without surface coating. Each implant in the test and the control group was randomly implanted in the left or right side of femoral condyles. On one side randomly-selected of the femur, each rabbit received a drill that was left without implant as control for the natural healing of bone. After 3 weeks of healing radiographic evaluation of the implant sites was taken. After 6 weeks of healing, rabbits were sacrificed for evaluation of the short-term osseointegration of the dental implants using digital radiography, micro-CT and histology analysis. To perform evaluation of osseointegration, implant location and group was double blinded for surgeon and histology/radiology researcher. Two rabbits died of wound infection in sites with non-coated implants 2 weeks after surgery. Thus, at least four rabbits per group survived after 6 weeks of healing. The wounds healed without suppuration and inflammation. No implant was loose after 6 weeks of healing. Radiography observations showed good osseointegration after 3 and 6 weeks postoperatively, which proved that the tissues followed a natural healing process. Micro-CT reconstruction and analysis showed that there was no statistically significant difference (P > 0.05) in volume of bone around the implant between implants coated with GL13K peptide and implants without coating. Histomorphometric analysis also showed that the mineralized bone area was no statistically different (P > 0.05) between implants coated with GL13K peptide and

  14. Immediately loaded mini dental implants as overdenture retainers: 1-Year cohort study of implant stability and peri-implant marginal bone level.

    Science.gov (United States)

    Šćepanović, Miodrag; Todorović, Aleksandar; Marković, Aleksa; Patrnogić, Vesna; Miličić, Biljana; Moufti, Adel M; Mišić, Tijana

    2015-05-01

    This 1-year cohort study investigated stability and peri-implant marginal bone level of immediately loaded mini dental implants used to retain overdentures. Each of 30 edentulous patients received 4 mini dental implants (1.8 mm × 13 mm) in the interforaminal mandibular region. The implants were immediately loaded with pre-made overdentures. Outcome measures included implant stability and bone resorption. Implant stability was measured using the Periotest Classic(®) device immediately after placement and on the 3rd and 6th weeks and the 4th, 6th and 12th months postoperatively. The peri-implant marginal bone level (PIBL) was evaluated at the implant's mesial and distal sides from the polished platform to the marginal crest. Radiographs were taken using a tailored film holder to reproducibly position the X-ray tube at the 6th week, 4th and 12th months postoperatively. The primary stability (Periotest value, PTV) measured -0.27 ± 3.41 on a scale of -8 to + 50 (lower PTV reflects higher stability). The secondary stability decreased significantly until week 6 (mean PTV = 7.61 ± 7.05) then increased significantly reaching (PTV = 6.17 ± 6.15) at 12 months. The mean PIBL measured -0.40 mm after 1 year of functional loading, with no statistically significant differences at the various follow-ups (p = 0.218). Mini dental implants placed into the interforaminal region could achieve a favorable primary stability for immediate loading. The follow-up Periotest values fluctuated, apparently reflecting the dynamics of bone remodeling, with the implants remaining clinically stable (98.3%) after 1 year of function. The 1-year bone resorption around immediately loaded MDIs is within the clinically acceptable range for standard implants. Copyright © 2014 Elsevier GmbH. All rights reserved.

  15. A Comparative and a Qualitative Analysis of Patient's Motivations, Expectations and Satisfaction with Dental Implants.

    Science.gov (United States)

    Walia, Komal; Belludi, Sphoorthi Anup; Kulkarni, Prasad; Darak, Praveen; Swamy, Shanmukha

    2016-04-01

    Dental Implants are the norm of today's prosthetic and restorative dentistry but, is it the answer for edentulism that can affect both individual's appearance and functioning, therefore having an impact on the psychological and the social well being of the person is an ongoing quest. Also, patient's beliefs and personal expectations for dental implants vary, which may influence the treatment outcome, thus emphasizing the importance of a good clinician-patient communication. Hence in this study a qualitative analysis was carried out with an earnest attempt to gain an insight into patient's motivations, personal expectations, satisfaction and impact of clinician's motivation for implant maintenance. To learn about patient's expectations and their level of satisfaction from dental implants. To know the impact of clinician's instructions and motivation for implant maintenance, with the patient's level of understanding and compare the level of motivation for implant maintenance and care provided by a dentist with Bachelor's degree to a dentist with a Master's degree. A 30 systemically healthy patients who had undergone implant treatment (aged 25-65 years) were considered and divided into two groups: Group A: 15 patients in whom implant placement was done by a dentist with Bachelor's degree (24 years, 18 years in general and implant practice respectively) and Group B: 15 patients in whom implant placement was done by a dentist with a Master's degree (Periodontics; 20 years,17 years in general and implant practice respectively). A qualitative analysis with the help of appropriate questionnaires comprising of multiple choice questions specifically designed for this purpose and few open ended questions was carried out with an earnest attempt to gain an insight into patient's motivations, personal expectations, satisfaction and impact of clinician's motivation for implant maintenance. Patients motivations for seeking implants and their expectations of treatment differed

  16. Efficacy of Octacalcium Phosphate Collagen Composite for Titanium Dental Implants in Dogs

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    Tadashi Kawai

    2018-02-01

    Full Text Available Background: Previous studies showed that octacalcium (OCP collagen composite (OCP/Col can be used to repair human jaw bone defects without any associated abnormalities. The present study investigated whether OCP/Col could be applied to dental implant treatment using a dog tooth extraction socket model. Methods: The premolars of dogs were extracted; each extraction socket was extended, and titanium dental implants were placed in each socket. OCP/Col was inserted in the space around a titanium dental implant. Autologous bone was used to fill the other sockets, while the untreated socket (i.e., no bone substitute material served as a control. Three months after the operation, these specimens were analyzed for the osseointegration of each bone substitute material with the surface of the titanium dental implant. Results: In histomorphometric analyses, the peri-implant bone areas (BA% and bone-implant contact (BIC% were measured. There was no difference in BA% or BIC% between OCP/Col and autologous bone. Conclusion: These results suggested that OCP/Col could be used for implant treatment as a bone substitute.

  17. Does the Implant Surgical Technique Affect the Primary and/or Secondary Stability of Dental Implants? A Systematic Review

    Science.gov (United States)

    Shadid, Rola Muhammed; Sadaqah, Nasrin Rushdi; Othman, Sahar Abdo

    2014-01-01

    Background. A number of surgical techniques for implant site preparation have been advocated to enhance the implant of primary and secondary stability. However, there is insufficient scientific evidence to support the association between the surgical technique and implant stability. Purpose. This review aimed to investigate the influence of different surgical techniques including the undersized drilling, the osteotome, the piezosurgery, the flapless procedure, and the bone stimulation by low-level laser therapy on the primary and/or secondary stability of dental implants. Materials and methods. A search of PubMed, Cochrane Library, and grey literature was performed. The inclusion criteria comprised observational clinical studies and randomized controlled trials (RCTs) conducted in patients who received dental implants for rehabilitation, studies that evaluated the association between the surgical technique and the implant primary and/or secondary stability. The articles selected were carefully read and classified as low, moderate, and high methodological quality and data of interest were tabulated. Results. Eight clinical studies were included then they were classified as moderate or high methodological quality and control of bias. Conclusions. There is a weak evidence suggesting that any of previously mentioned surgical techniques could influence the primary and/or secondary implant stability. PMID:25126094

  18. Does the Implant Surgical Technique Affect the Primary and/or Secondary Stability of Dental Implants? A Systematic Review

    Directory of Open Access Journals (Sweden)

    Rola Muhammed Shadid

    2014-01-01

    Full Text Available Background. A number of surgical techniques for implant site preparation have been advocated to enhance the implant of primary and secondary stability. However, there is insufficient scientific evidence to support the association between the surgical technique and implant stability. Purpose. This review aimed to investigate the influence of different surgical techniques including the undersized drilling, the osteotome, the piezosurgery, the flapless procedure, and the bone stimulation by low-level laser therapy on the primary and/or secondary stability of dental implants. Materials and methods. A search of PubMed, Cochrane Library, and grey literature was performed. The inclusion criteria comprised observational clinical studies and randomized controlled trials (RCTs conducted in patients who received dental implants for rehabilitation, studies that evaluated the association between the surgical technique and the implant primary and/or secondary stability. The articles selected were carefully read and classified as low, moderate, and high methodological quality and data of interest were tabulated. Results. Eight clinical studies were included then they were classified as moderate or high methodological quality and control of bias. Conclusions. There is a weak evidence suggesting that any of previously mentioned surgical techniques could influence the primary and/or secondary implant stability.

  19. Full mouth restoration on dental implants utilizing titanium laser-welded frameworks.

    Science.gov (United States)

    Schneider, Robert

    2009-01-01

    In today's dental literature, most frequently, esthetics are addressed with fixed restorations. This article will illustrate the opportunity to provide our patients with very good esthetic outcomes with a hopeless dentition utilizing dental implants, laser-welded titanium components, and characterized acrylic resin prostheses. The definitive prostheses provide excellent facial support, phonetics, esthetics, smile line, and function. The steps in such a treatment will be presented from the clinical to dental laboratory procedures. Incorporating newer technology into our patient treatment plans, which increasingly includes dental implants, may allow more time-efficient, esthetic, predictable, and reliable treatment. Laser-welded titanium frameworks offer many advantages for the patient, clinician, and dental technician, which are illustrated.

  20. Patients' perception about dental implant and bone graft surgery: A questionnaire-based survey

    Directory of Open Access Journals (Sweden)

    Neha Agrawal

    2017-01-01

    Full Text Available Introduction: The decision toward dental implant – an elective procedure in most cases depends on patients' preferences, values, as well as cost considerations. Patients' participation and codetermination, as well as realistic patient expectations, have been associated with improved subjective treatment outcomes, and health professionals are increasingly encouraged to involve their patients in treatment decisions. However, scientific data on patient expectations and motivation to choose or refuse dental implants are scarce. Aim: The aim of this study is to assess perception about the dental implant and bone graft surgery among patients seeking dental implants. Materials and Methods: A cross-sectional questionnaire study was carried out in OPD of Dental College, Aligarh. One hundred and twenty patients participated in this study. The patients were asked to answer a questionnaire on implant and bone graft surgery including cost and time concerns and second-opinion behavior. Descriptive statistics were calculated for the different variables, and absolute frequencies and percentages were evaluated. A value of P< 0.05 was selected as the threshold for statistical significance. Results: The highest priority was given to treatment predictability and avoidance of the removable dentures by the patients. On an average, the total treatment time was estimated to be 6 months. Patients' opinion regarding 10-year implant success rate was 81%. Autologous bone grafts was accepted by 61% of interviewees (the majority preferring the retromolar area. Young patients, especially males showed higher second opinion-seeking behavior. Conclusions: There is a growing interest in patients' perspectives and expectations of dental implants and bone graft surgeries. Patient expectations on implant success and predictability were found to be high.

  1. Reconstruction of the maxilla following hemimaxillectomy defects with scapular tip grafts and dental implants.

    Science.gov (United States)

    Mertens, Christian; Freudlsperger, Christian; Bodem, Jens; Engel, Michael; Hoffmann, Jürgen; Freier, Kolja

    2016-11-01

    Treatment of post-resective defects of the maxilla can be challenging and usually requires dental obturation or microvascular reconstruction. As compared to soft-tissue microvascular grafts, bone reconstruction can additionally allow for facial support and retention of dental implants. The aim of this study was to evaluate scapular tip grafts with respect to their applicability for maxillary reconstruction and their potential to retain dental implants for later dental rehabilitation. In this retrospective study, 14 patients with hemimaxillectomy defects were reconstructed with free scapular tip grafts, oriented horizontally, to rebuild the palate and alveolar ridge. After bone healing, three-dimensional virtual implant planning was performed, and a radiographic guide was fabricated to enable implant placement in the optimal anatomic and prosthetic position. All patients' mastication and speech were evaluated, along with the extent of defect closure, suitability of the graft sites for implant placement, and soft-tissue stability. Pre- and postsurgical radiographs were also evaluated. A good postoperative outcome was achieved in all patients, with complete closure of maxillary defects that were class II, according to the system of Brown and Shaw. Additional bone augmentation was necessary in two patients in order to increase vertical bone height. Patients were subsequently treated with 50 dental implants to retain dental prostheses. In all cases, additional soft-tissue surgery was necessary to achieve a long-term stable periimplant situation. No implants were lost during the mean observation period of 34 months. Due to its specific form, the scapular tip graft is well suited to reconstruct the palate and maxillary alveolar ridge and to enable subsequent implant-retained rehabilitation. Due to the limited bone volume, an accurate three-dimensional graft orientation is essential. Furthermore, most cases require additional soft-tissue surgery to achieve a long

  2. Floor-of-Mouth Hematoma Following Dental Implant Placement: Literature Review and Case Presentation.

    Science.gov (United States)

    Law, Catherine; Alam, Peyman; Borumandi, Farzad

    2017-11-01

    The authors provide a structured review of reported cases of floor-of-mouth hematoma during or after dental implantation and frequent causes and management and present a related case. An online search of the medical literature was conducted from 1990 through 2016. The following search terms were used: floor of mouth hematoma, sublingual hematoma, dental implant hematoma, implant in mandible, and complication of dental implant. Abstracts were screened for relevance to the aims of the review. Relevant reports in the English language were included and referenced. The articles were reviewed for patient demographics, implant location, coagulopathy, pre- or postoperative imaging, airway management, treatment of the hematoma, and management of the offending implant. The literature search identified 25 reported cases. Hemorrhage was caused by perforation of the lingual cortex in 84% of cases (n = 21). Airway obstruction resulted in emergency intubation or tracheostomy in 68% of patients (n = 17). Most cases (n = 18; 72%) required surgical management in the hospital setting. Management of the offending implant was reported inconsistently. Of 17 reported cases, 5 implants had to be removed, 9 remained in situ, and in 3 cases implant placement was abandoned. Only 1 case involved preoperative 3-dimensional (3D) imaging before implant insertion. The authors report on an additional case with a serious floor-of-mouth hematoma that required immediate surgical evacuation and hemostasis. Serious complications, such as floor-of-mouth hematoma after dental implant insertion, can occur, which could be life-threatening. Preoperative 3D imaging helps to visualize the individual mandibular shape, which could decrease the incidence of serious complications. If injury to vessels of the floor of the mouth cannot be confidently excluded, then further assessment and treatment are recommended before the patient is discharged. Copyright © 2017 American Association of Oral and

  3. Effects of biomechanical properties of the bone-implant interface on dental implant stability: from in silico approaches to the patient's mouth.

    Science.gov (United States)

    Haïat, Guillaume; Wang, Hom-Lay; Brunski, John

    2014-07-11

    Dental implants have become a routinely used technique in dentistry for replacing teeth. However, risks of failure are still experienced and remain difficult to anticipate. Multiscale phenomena occurring around the implant interface determine the implant outcome. The aim of this review is to provide an understanding of the biomechanical behavior of the interface between a dental implant and the region of bone adjacent to it (the bone-implant interface) as a function of the interface's environment. First, we describe the determinants of implant stability in relation to the different multiscale simulation approaches used to model the evolution of the bone-implant interface. Then, we review the various aspects of osseointegration in relation to implant stability. Next, we describe the different approaches used in the literature to measure implant stability in vitro and in vivo. Last, we review various factors affecting the evolution of the bone-implant interface properties.

  4. Osteoblast integration of dental implant materials after challenge by sub-gingival pathogens : a co-culture study in vitro

    NARCIS (Netherlands)

    Zhao, Bingran; van der Mei, Henny C; Rustema-Abbing, Minie; Busscher, Henk J; Ren, Yijin

    2015-01-01

    Sub-gingival anaerobic pathogens can colonize an implant surface to compromise osseointegration of dental implants once the soft tissue seal around the neck of an implant is broken. In vitro evaluations of implant materials are usually done in monoculture studies involving either tissue integration

  5. Two-stage dental implants inserted in a one-stage procedure : a prospective comparative clinical study

    NARCIS (Netherlands)

    Heijdenrijk, Kees

    2002-01-01

    The results of this study indicate that dental implants designed for a submerged implantation procedure can be used in a single-stage procedure and may be as predictable as one-stage implants. Although one-stage implant systems and two-stage.

  6. Finite element analysis of the biomechanical effects of PEEK dental implants on the peri-implant bone.

    Science.gov (United States)

    Schwitalla, A D; Abou-Emara, M; Spintig, T; Lackmann, J; Müller, W D

    2015-01-02

    Dental implants are mostly fabricated of titanium. Potential problems associated with these implants are discussed in the literature, for example, overloading of the jawbone during mastication due to the significant difference in the elastic moduli of titanium (110 GPa) and bone (≈1-30 GPa). Therefore poly-ether-ether-ketone (PEEK) could represent an alternative biomaterial (elastic modulus 3-4 GPa). Endolign(®) represents an implantable carbon fiber reinforced (CFR)-PEEK including parallel oriented endless carbon fibers. According to the manufacturer it has an elastic modulus of 150 GPa. PEEK compounds filled with powders show an elastic modulus around 4 GPa. The aim of the present finite element analysis was to point out the differences in the biomechanical behavior of a dental implant of Endolign(®) and a commercial powder-filled PEEK. Titanium served as control. These three materials were used for a platform-switched dental implant-abutment assembly, whereas Type 1 completely consisted of titanium, Type 2 of a powder-filled PEEK and Type 3 of Endolign(®). A force of 100 N was applied vertically and of 30° to the implant axis. All types showed a minimum safety factor regarding the yield strength of cortical bone. However, within the limits of this study the Type 2 implant showed higher stresses within the adjacent cortical bone than Type 1 and Type 3. These implant assemblies showed similar stress distributions. Endless carbon fibers give PEEK a high stability. Further investigations are necessary to evaluate whether there is a distinct amount of endless carbon fibers causing an optimal stress distribution behavior of CFR-PEEK. Copyright © 2014 Elsevier Ltd. All rights reserved.

  7. Biomechanical 3-Dimensional Finite Element Analysis of Obturator Protheses Retained with Zygomatic and Dental Implants in Maxillary Defects

    Science.gov (United States)

    Akay, Canan; Yaluğ, Suat

    2015-01-01

    Background The objective of this study was to investigate the stress distribution in the bone around zygomatic and dental implants for 3 different implant-retained obturator prostheses designs in a Aramany class IV maxillary defect using 3-dimensional finite element analysis (FEA). Material\\Methods A 3-dimensional finite element model of an Aramany class IV defect was created. Three different implant-retained obturator prostheses were modeled: model 1 with 1 zygomatic implant and 1 dental implant, model 2 with 1 zygomatic implant and 2 dental implants, and model 3 with 2 zygomatic implants. Locator attachments were used as a superstructure. A 150-N load was applied 3 different ways. Qualitative analysis was based on the scale of maximum principal stress; values obtained through quantitative analysis are expressed in MPa. Results In all loading conditions, model 3 (when compared models 1 and 2) showed the lowest maximum principal stress value. Model 3 is the most appropirate reconstruction in Aramany class IV maxillary defects. Two zygomatic implants can reduce the stresses in model 3. The distribution of stresses on prostheses were more rational with the help of zygoma implants, which can distribute the stresses on each part of the maxilla. Conclusions Aramany class IV obturator prosthesis placement of 2 zygomatic implants in each side of the maxilla is more advantageous than placement of dental implants. In the non-defective side, increasing the number of dental implants is not as suitable as zygomatic implants. PMID:25714086

  8. Biomechanical 3-dimensional finite element analysis of obturator protheses retained with zygomatic and dental implants in maxillary defects.

    Science.gov (United States)

    Akay, Canan; Yaluğ, Suat

    2015-02-25

    The objective of this study was to investigate the stress distribution in the bone around zygomatic and dental implants for 3 different implant-retained obturator prostheses designs in a Aramany class IV maxillary defect using 3-dimensional finite element analysis (FEA). A 3-dimensional finite element model of an Aramany class IV defect was created. Three different implant-retained obturator prostheses were modeled: model 1 with 1 zygomatic implant and 1 dental implant, model 2 with 1 zygomatic implant and 2 dental implants, and model 3 with 2 zygomatic implants. Locator attachments were used as a superstructure. A 150-N load was applied 3 different ways. Qualitative analysis was based on the scale of maximum principal stress; values obtained through quantitative analysis are expressed in MPa. In all loading conditions, model 3 (when compared models 1 and 2) showed the lowest maximum principal stress value. Model 3 is the most appropirate reconstruction in Aramany class IV maxillary defects. Two zygomatic implants can reduce the stresses in model 3. The distribution of stresses on prostheses were more rational with the help of zygoma implants, which can distribute the stresses on each part of the maxilla. Aramany class IV obturator prosthesis placement of 2 zygomatic implants in each side of the maxilla is more advantageous than placement of dental implants. In the non-defective side, increasing the number of dental implants is not as suitable as zygomatic implants.

  9. Squamous cell carcinoma in association with dental implants: an assessment of previously hypothesized carcinogenic mechanisms and a case report.

    Science.gov (United States)

    Bhatavadekar, Neel B

    2012-12-01

    Although dental implants have seen tremendous clinical success over the past few decades, there are some worrying reports in literature describing squamous cell carcinoma (SCC) in close association with dental implants. This article also provides a critical assessment of the published literature relating to the presence of carcinoma in association with dental implants, analyzing the previously published and hypothesized carcinogenic responses to an implant, to try and come to a conclusion regarding the plausibility and clinical risk for cancer formation in association with dental implants. An unusual case of an SCC noted in close proximity to a dental implant is also presented. A systematic search was conducted using Medline (PubMed), Cochrane Database, and Google Scholar with the search terms "cancer," "squamous cell carcinoma," "dental implant," "SCC," "peri-implantitis," "oral cancer," and "implantology" and using multiple combinations using Boolean operators "or" and "and." The search was not limited to dental literature; orthopedic and biomedical literature was also included. The results were then hand screened to pick out the relevant articles. In total, 14 previous published reports were found, where 24 dental implants were reported to be associated with SCC. Not all the reported patients had a history of cancer, but contributory factors such as smoking were found. An analysis of the biological plausibility of previously proposed carcinogenic mechanisms, such as corrosion, metallic ion release, and particulate debris, did not support the etiologic role for dental implants in cancer development, and the standardized incidence ratio was found to be extremely low (0.00017). Peri-implantitis should be assessed cautiously in patients receiving implants who have a previous history of cancer. Dental implants are a safe treatment modality based on the published data, and any change in surgical protocol is not mandated.

  10. In Vitro Laser Treatment Platform Construction with Dental Implant Thread Surface on Bacterial Adhesion for Peri-Implantitis

    Science.gov (United States)

    Mei, Hsiang-I; Liu, Tse-Ying; Lo, Lun-Jou

    2017-01-01

    This study constructs a standard in vitro laser treatment platform with dental implant thread surface on bacterial adhesion for peri-implantitis at different tooth positions. The standard clinical adult tooth jaw model was scanned to construct the digital model with 6 mm bone loss depth on behalf of serious peri-implantitis at the incisor, first premolar, and first molar. A cylindrical suite connected to the implant and each tooth root in the jaw model was designed as one experimental unit set to allow the suite to be replaced for individual bacterial adhesion. The digital peri-implantitis and suite models were exported to fulfill the physical model using ABS material in a 3D printer. A 3 mm diameter specimen implant on bacterial adhesion against Escherichia coli was performed for gram-negative bacteria. An Er:YAG laser, working with a chisel type glass tip, was moved from the buccal across the implant thread to the lingual for about 30 seconds per sample to verify the in vitro laser treatment platform. The result showed that the sterilization rate can reach 99.3% and the jaw model was not damaged after laser irradiation testing. This study concluded that using integrated image processing, reverse engineering, CAD system, and a 3D printer to construct a peri-implantitis model replacing the implant on bacterial adhesion and acceptable sterilization rate proved the feasibility of the proposed laser treatment platform. PMID:28791302

  11. In Vitro Laser Treatment Platform Construction with Dental Implant Thread Surface on Bacterial Adhesion for Peri-Implantitis

    Directory of Open Access Journals (Sweden)

    Hsien-Nan Kuo

    2017-01-01

    Full Text Available This study constructs a standard in vitro laser treatment platform with dental implant thread surface on bacterial adhesion for peri-implantitis at different tooth positions. The standard clinical adult tooth jaw model was scanned to construct the digital model with 6 mm bone loss depth on behalf of serious peri-implantitis at the incisor, first premolar, and first molar. A cylindrical suite connected to the implant and each tooth root in the jaw model was designed as one experimental unit set to allow the suite to be replaced for individual bacterial adhesion. The digital peri-implantitis and suite models were exported to fulfill the physical model using ABS material in a 3D printer. A 3 mm diameter specimen implant on bacterial adhesion against Escherichia coli was performed for gram-negative bacteria. An Er:YAG laser, working with a chisel type glass tip, was moved from the buccal across the implant thread to the lingual for about 30 seconds per sample to verify the in vitro laser treatment platform. The result showed that the sterilization rate can reach 99.3% and the jaw model was not damaged after laser irradiation testing. This study concluded that using integrated image processing, reverse engineering, CAD system, and a 3D printer to construct a peri-implantitis model replacing the implant on bacterial adhesion and acceptable sterilization rate proved the feasibility of the proposed laser treatment platform.

  12. The Relationship between Biofilm and Physical-Chemical Properties of Implant Abutment Materials for Successful Dental Implants

    Directory of Open Access Journals (Sweden)

    Erica Dorigatti de Avila

    2014-05-01

    Full Text Available The aim of this review was to investigate the relationship between biofilm and peri-implant disease, with an emphasis on the types of implant abutment surfaces. Individuals with periodontal disease typically have a large amount of pathogenic microorganisms in the periodontal pocket. If the individuals lose their teeth, these microorganisms remain viable inside the mouth and can directly influence peri-implant microbiota. Metal implants offer a suitable solution, but similarly, these remaining bacteria can adhere on abutment implant surfaces, induce peri-implantitis causing potential destruction of the alveolar bone near to the implant threads and cause the subsequent loss of the implant. Studies have demonstrated differences in biofilm formation on dental materials and these variations can be associated with both physical and chemical characteristics of the surfaces. In the case of partially edentulous patients affected by periodontal disease, the ideal type of implant abutments utilized should be one that adheres the least or negligible amounts of periodontopathogenic bacteria. Therefore, it is of clinically relevance to know how the bacteria behave on different types of surfaces in order to develop new materials and/or new types of treatment surfaces, which will reduce or inhibit adhesion of pathogenic microorganisms, and, thus, restrict the use of the abutments with indication propensity for bacterial adhesion.

  13. Bone augmentation with bioactive glass in three cases of dental implant placement.

    Science.gov (United States)

    Gatti, Antonietta M; Simonetti, Leopoldo A; Monari, Emanuela; Guidi, Stefano; Greenspan, David

    2006-04-01

    This study reports the clinical use of a bioactive bone graft material, PerioGlas, in the treatment of dental extraction sites before dental implant placement, to effect bone regeneration and to give early fixation to the implant.PerioGlas, granules, ranging from 90 to 710 mm, are implanted after tooth extraction in three patients; after 6 months bone biopsies were performed in the site of the glass implantation and observed under Electron Scanning Microscopy. All the granules showed a biodegradation involving precipitation of calcium phosphate that worked as a scaffold for osteoblasts colonization. All cases examined showed the bioactivity of PerioGlas granules resulting in new bone formation and biodegradation of the glass. After a two-year clinical follow-up all the implants were successfully loaded and appeared stable.

  14. Use of dental implants to improve unfavorable removable partial denture design.

    Science.gov (United States)

    Mijiritsky, Eitan; Ormianer, Zeev; Klinger, Avigdor; Mardinger, Ofer

    2005-10-01

    This study aimed to determine whether the use of a limited number of dental implants, with no rigid connection between implants and teeth and as few as possible prosthetic element requirements, is a viable solution for improving unfavorable removable partial dentures (RPD) design. Fifteen partially edentulous patients with an unfavorable number and distribution of abutment teeth were treated, each with a limited number of implants, from 1997 to 2004, resulting in an improved RPD design. Implant survival rate was 100%, and prosthetic complications were minor. All patients reported great satisfaction with the partial dentures and good chewing efficiency. The results indicate that the use of dental implants to improve unfavorable RPD design is a viable and cost-effective treatment modality.

  15. Measurement of Primary and Secondary Stability of Dental Implants by Resonance Frequency Analysis Method in Mandible

    Science.gov (United States)

    Shokri, Mehran; Daraeighadikolaei, Arash

    2013-01-01

    Background. There is no doubt that the success of the dental implants depends on the stability. The aim of this work was to measure the stability of dental implants prior to loading the implants, using a resonance frequency analysis (RFA) by Osstell mentor device. Methods. Ten healthy and nonsmoker patients over 40 years of age with at least six months of complete or partial edentulous mouth received screw-type dental implants by a 1-stage procedure. RFA measurements were obtained at surgery and 1, 2, 3, 4, 5, 7, and 11 weeks after the implant surgery. Results. Among fifteen implants, the lowest mean stability measurement was for the 4th week after surgery in all bone types. At placement, the mean ISQ obtained with the magnetic device was 77.2 with 95% confidence interval (CI) = 2.49, and then it decreased until the 4th week to 72.13 (95% CI = 2.88), and at the last measurement, the mean implant stability significantly (P value implant placement. These suggestions need to be further assessed through future studies. PMID:23737790

  16. Metal elements in tissue with dental peri-implantitis: a pilot study.

    Science.gov (United States)

    Fretwurst, Tobias; Buzanich, Guenter; Nahles, Susanne; Woelber, Johan Peter; Riesemeier, Heinrich; Nelson, Katja

    2016-09-01

    Dental peri-implantitis is characterized by a multifactorial etiology. The role of metal elements as an etiological factor for peri-implantitis is still unclear. The aim of this study was to investigate the incidence of metal elements in bone and mucosal tissues around dental Grade 4 CP titanium implants with signs of peri-implantitis in human patients. In this prospective pilot study, all patients were enrolled consecutively in two study centers. Bone and soft tissue samples of patients with peri-implantitis with indication for explantation were analyzed for the incidence of different elements (Ca, P, Ti, Fe) by means of synchrotron radiation X-ray fluorescence spectroscopy (SRXRF) and polarized light microscopy (PLM). The existence of macrophages and lymphocytes in the histologic specimens was analyzed. Biopsies of 12 patients (seven bone samples, five mucosal samples) were included and analyzed. In nine of the 12 samples (75%), the SRXRF examination revealed the existence of titanium (Ti) and an associated occurrence with Iron (Fe). Metal particles were detected in peri-implant soft tissue using PLM. In samples with increased titanium concentration, lymphocytes were detected, whereas M1 macrophages were predominantly seen in samples with metal particles. Titanium and Iron elements were found in soft and hard tissue biopsies retrieved from peri-implantitis sites. Further histologic and immunohistochemical studies need to clarify which specific immune reaction metal elements/particles induce in dental peri-implant tissue. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  17. Impact of dental implant length on early failure rates: a meta-analysis of observational studies.

    Science.gov (United States)

    Pommer, Bernhard; Frantal, Sophie; Willer, Jürgen; Posch, Martin; Watzek, Georg; Tepper, Gabor

    2011-09-01

    To test the null hypothesis of no difference in failure rates of short (minimum length: 7 mm) and longer dental implants (≥ 10 mm), a meta-analysis was performed on prospective observational trials. A systematic electronic and hand search was performed to identify eligible studies. Having additional data supplied by the authors, 54 publications were included (19,083 implants). In case of mandibular implants, the null hypothesis of no impact of reduced implant length on failure within the first year of prosthetic loading could not be rejected. A significant impact of implant length could be substantiated for short machined implants in the anterior [odds ratio (OR) 5.4] and posterior maxilla (OR 3.4), while short rough-surfaced implants demonstrated increased failure rates in the anterior maxillary sites. No influence of implant diameter and denture type on the failure rate of short implants could be revealed. In areas of reduced alveolar bone height the use of short dental implants may reduce the need for invasive bone augmentation procedures. © 2011 John Wiley & Sons A/S.

  18. Zirconia Dental Implants: Investigation of Clinical Parameters, Patient Satisfaction, and Microbial Contamination.

    Science.gov (United States)

    Holländer, Jens; Lorenz, Jonas; Stübinger, Stefan; Hölscher, Werner; Heidemann, Detlef; Ghanaati, Shahram; Sader, Robert

    2016-01-01

    In recent years, dental implants made from zirconia have been further developed and are considered a reliable treatment method for replacing missing teeth. The aim of this study was to analyze dental implants made from zirconia regarding their clinical performance compared with natural teeth (control). One hundred six zirconia implants in 38 adults were analyzed in a clinical study after 1 year of loading. The plaque index (PI), bleeding on probing (BOP), probing pocket depth (PPD), probing attachment level (PAL), and creeping or recession (CR/REC) of the gingiva were detected and compared with natural control teeth (CT). Furthermore, the papilla index (PAP), Periotest values (PTV), microbial colonization of the implant/dental sulcus fluid, and patient satisfaction were assessed. The survival rate was 100%. No statistical significance was observed between implants and teeth regarding BOP, PPD, and PAL. A statistical significance was detected regarding PI and CR/REC with significantly less plaque accumulation and recession in the study group. Mean PAP was 1.76 ± 0.55, whereas the mean PTV was -1.31 ± 2.24 (range from -5 to +6). A non-statistically significant higher colonization of periodontitis/peri-implantitis bacteria was observed in the implant group. The questionnaire showed that the majority of the patients were satisfied with the overall treatment. One-piece zirconia dental implants exhibited similar clinical results (BOP, PPD, and PAL) compared with natural teeth in regard to adhesion of plaque (PI) and creeping attachment (CR/REC); zirconia implants performed even better. The favorable results for PAL and CR/REC reflect the comparable low affinity of zirconia for plaque adhesion. Patient satisfaction indicated a high level of acceptance for zirconia implants. However, a long-term follow-up is needed to support these findings.

  19. Indications and contraindications of dental implants in medically compromised patients: update.

    Science.gov (United States)

    Gómez-de Diego, Rafael; Mang-de la Rosa, María del Rocío; Romero-Pérez, María-Jesús; Cutando-Soriano, Antonio; López-Valverde-Centeno, Antonio

    2014-09-01

    The aim of this study was to review the current scientific literature in order to analyse the indications and contraindications of dental implants in medically compromised patients. A reference research was carried out on PubMed using the key words "implant" AND (oral OR dental) AND (systemic disease OR medically compromised), in articles published between 1993 and 2013. The inclusion criteria were the following: clinical studies in which, at least, 10 patients were treated, consensus articles, reviewed articles and meta-analysis performed in humans treated with dental implants, and which included the disease diagnosis. A total of 64 articles were found, from which 16 met the inclusion criteria. Cardiac systemic diseases, diabetic endocrine pathologies or controlled metabolic disorders do not seem to be a total or partial contraindication to the placement of dental implants. Tobacco addiction, and head and neck radiotherapy are correlated to a higher loss of dental implants. Patients suffering from osteoporosis undergoing biphosphonates therapy show an increased risk of developing bone necrosis after an oral surgery, especially if the drugs are administered intravenously or they are associated to certain concomitant medication.

  20. A Critical Review of Dental Implant Materials with an Emphasis on Titanium versus Zirconia

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    Reham B. Osman

    2015-03-01

    Full Text Available The goal of the current publication is to provide a comprehensive literature review on the topic of dental implant materials. The following paper focuses on conventional titanium implants and more recently introduced and increasingly popular zirconia implants. Major subtopics include the material science and the clinical considerations involving both implant materials and the influence of their physical properties on the treatment outcome. Titanium remains the gold standard for the fabrication of oral implants, even though sensitivity does occur, though its clinical relevance is not yet clear. Zirconia implants may prove to be promising in the future; however, further in vitro and well-designed in vivo clinical studies are needed before such a recommendation can be made. Special considerations and technical experience are needed when dealing with zirconia implants to minimize the incidence of mechanical failure.

  1. Effect of Polyvinyl Siloxane Viscosity on Accuracy of Dental Implant Impressions

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    Ahmad Ghahremanloo

    2017-02-01

    Full Text Available Objectives: The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS.Materials and Methods: Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body and direct and indirect techniques (six groups were used, and seven impressions were obtained from each group (n=42. To measure the accuracy of impressions, drift, horizontal, and vertical angles of the implants, as well as the hex rotation of the implants in casts were evaluated using a digitizer device (1μm accuracy, in comparison with master arch. Data were analyzed using five-factor two-way ANOVA and Tukey’s post-hoc test.Results: The accuracy of impressions was assessed and the results showed that direct technique was not significantly different from indirect technique (P>0.05. Also, there were no significant differences between the mentioned viscosities except for the horizontal angle (P=0.006.Conclusions: Viscosity of impression materials is of high significance for the accuracy of dental impressions.Keywords: Dental Materials; Dental Implants; Dental Impression Technique; Viscosity; Vinyl Polysiloxane; Dimensional Measurement Accuracy

  2. A case of recovery of oral function with dental implants following facial bone trauma.

    Science.gov (United States)

    Kamoi, Hisahiro

    2012-01-01

    A 44-year-old woman had sustained facial lacerations, loss of several teeth, alveolar bone fracture, and severe vertical bone resorption in conjunction with a shattered alveolar bone and marked loss of intraoral function and facial disfigurement in a car accident. She underwent 9 surgical procedures by plastic surgeons to treat the facial lesions, including hold facial scar formation reduction surgery, reduction of fractures of the nasal and cheek bones, and bone transplants. To restore intraoral function and improve facial appearance, plastic surgeons transplanted a rib into the maxillary sinus while dental surgeons simultaneously inserted 5 dental implants. Eleven months after the dental implant surgery, a complete upper denture and a mandibular gingival ceramometal-casting crown were fitted. After insertion of the final prosthodontics, regular follow-up examinations were performed to check dental occlusion, oral hygiene, and the condition of the gingival tissue. In the years since the upper dental implants were fitted, there have been no bone resorption and no functional problems. Transplantation of rib bones is an effective method for maxillary reconstruction and remains effective even after the insertion of dental implants. The patient is extremely satisfied with the results. A means of maintaining oral health over the long term, and of motivating the patient to maintain oral health, should be established.

  3. Assessment of blinding success among dental implant clinical trials: A systematic review

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    Jafar Kolahi

    2015-01-01

    Full Text Available Introduction: It is widely believed that blinding is a cornerstone of randomized clinical trials and that significant bias may result from unsuccessful blinding. However, it is not enough to claim that a clinical trial is single- or double-blinded and that assessment of the success of blinding is ideal. The aim of this study was to evaluate the prevalence of assessment of blinding success among dental implant clinical trials and to introduce methods of blinding assessment to the implant research community. Methods: In November 2014, PubMed was searched by blinded and experienced researchers with the query "implant AND (blindFNx01 OR maskFNx01" using the following filters: (1 Article type: clinical trial; (2 Journal categories: dental journals; (3 Field: title/abstract. Consequently, title/abstract was reviewed in all relevant articles to find any attempt to assess the success of blinding in dental implant clinical trials. Results: The PubMed search results yielded 86 clinical trials. The point of interest is that when "blindFNx01 OR maskFNx01" was deleted from the query, the number of results increased to 1688 clinical trials. This shows that only 5% of dental implant clinical trials tried to use blinding. Disappointingly, we could not find any dental implant clinical trial reporting any attempt to assess the success of blinding. Conclusion: The current status of turning a blind eye to unblinding in dental implant clinical trials is not tolerable and needs to be improved. Researchers, protocol reviewers, local ethical committees, journal reviewers, and editors should make a concerted effort to incorporate, report, and publish such information to understand its potential impact on study results.

  4. In situ microradioscopy and microtomography of fatigue-loaded dental two-piece implants

    Energy Technology Data Exchange (ETDEWEB)

    Wiest, Wolfram; Zabler, Simon, E-mail: simon.zabler@physik.uni-wuerzburg.de [University of Würzburg (Germany); Rack, Alexander [European Synchrotron Radiation Facility (France); Fella, Christian; Balles, Andreas [University of Würzburg (Germany); Nelson, Katja; Schmelzeisen, Rainer [Medical Centre – University of Freiburg (Germany); Hanke, Randolf [University of Würzburg (Germany); Fraunhofer EZRT, Fürth (Germany)

    2015-10-09

    Results of a novel in situ microradiography and microtomography setup for the study of fatigue processes are presented. This setup is optimized for the requirements of dental implants and use at synchrotron imaging beamlines. Synchrotron real-time radioscopy and in situ microtomography are the only techniques providing direct visible information on a micrometre scale of local deformation in the implant–abutment connection (IAC) during and after cyclic loading. The microgap formation at the IAC has been subject to a number of studies as it has been proposed to be associated with long-term implant success. The next step in this scientific development is to focus on the in situ fatigue procedure of two-component dental implants. Therefore, an apparatus has been developed which is optimized for the in situ fatigue analysis of dental implants. This report demonstrates both the capability of in situ radioscopy and microtomography at the ID19 beamline for the study of cyclic deformation in dental implants. The first results show that it is possible to visualize fatigue loading of dental implants in real-time radioscopy in addition to the in situ fatigue tomography. For the latter, in situ microtomography is applied during the cyclic loading cycles in order to visualize the opening of the IAC microgap. These results concur with previous ex situ studies on similar systems. The setup allows for easily increasing the bending force, to simulate different chewing situations, and is, therefore, a versatile tool for examining the fatigue processes of dental implants and possibly other specimens.

  5. Survival of dental implants in patients with Down syndrome: A case series.

    Science.gov (United States)

    Limeres Posse, Jacobo; López Jiménez, Julian; Ruiz Villandiego, José C; Cutando Soriano, Antonio; Fernández Feijoo, Javier; Linazasoro Elorza, Maialen; Diniz Freitas, Márcio; Diz Dios, Pedro

    2016-12-01

    The need for tooth replacement in individuals with Down syndrome (DS) is explained by the high prevalence of dental agenesis and by the premature loss of teeth through severe periodontal disease. Dental implants may be the dental procedure of choice in some of these patients. The purpose of this clinical study was to analyze dental implant survival in a series of patients with DS. This was a multicenter, retrospective, observational study. Information on patients was gathered using a standardized questionnaire designed specifically for this study, including personal details, oral health status, information on the surgical and prosthetic phases, and follow-up visits. The questionnaire was sent to centers registered with the research network of the Spanish Society of Special Needs Dentistry (SEOENE). Patients with DS aged 18 years or older were included in the study if they had at least 1 dental implant and the corresponding prosthesis and had been followed up for at least a year. The study population was formed of 25 adult patients (13 men and 12 women) aged between 19 and 60 years. The interventions were performed by 5 different dental surgeons, usually under general anesthesia or deep sedation (n=17 patients). A total of 73 implants were inserted, 30 in the maxilla and 43 in the mandible, most commonly in the anterior region (n=51). The mean time to loading the implants was 4.1 ±1.3 months after surgery (range, 1 to 7 months). All patients completed prosthetic rehabilitation; the most frequent design used was the single fixed prosthesis (n=13 patients). A total of 17 (23.2%) implants failed in 8 (32%) patients; the majority (n=14 implants) failed in the postsurgical period before implant loading. The distribution by patients was 1 implant failure in 6 patients, 3 failures in 1 patient, and 8 failures in 1 patient. Dental implant survival is lower in individuals with DS than in the general population. The reasons for early implant failure in these patients have

  6. Subperiosteal Osteoid Osteoma of the Neck of Talus

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    Javed Ahmad Khan

    2009-01-01

    Full Text Available Juxta-articular, subperiosteal osteoid osteomas arising around the ankle are unusual. Tumors arising on the neck of the talus commonly produce symptoms mimicking monoarticular arthritis. Patients are usually treated for arthritis or ankle sprain, which often leads to a delay in definitive diagnosis. Here we present a case of osteoid osteoma of neck of talus which was presented as ankle pain. It puzzled us until MRI was done. Diagnostic dilemma and delay can be avoided by high index of suspicion. The patient was treated with open removal of the tumor. We also present brief review of literature about juxta-articular, subperiosteal osteoid osteoma which is uncommon from the typical osteoid osteoma occurring elsewhere in the body. Keywords: juxta-articular, subperiosteal, osteoid osteoma, talus neck

  7. The effect of bruxism on treatment planning for dental implants.

    Science.gov (United States)

    Misch, Carl E

    2002-09-01

    Bruxism is a potential risk factor for implant failure. Excessive force is the primary cause of late implant complications. An appreciation of the etiology of crestal bone loss, failure of implants, failure to retain implant restorations, and fracture of components will lead the practitioner to develop a treatment plan that reduces force on implants and their restorations. The forces are considered in terms of magnitude, duration, direction, type, and magnification. Once the dentist has identified the source(s) of additional force on the implant system, the treatment plan is altered to contend with and reduce the negative sequelae on the bone, implant, and final restoration. One viable approach is to increase the implant-bone surface area. Additional implants can be placed to decrease stress on any one implant, and implants in molar regions should have an increased width. Use of more and wider implants decreases the strain on the prosthesis and also dissipates stress to the bone, especially at the crest. The additional implants should be positioned with intent to eliminate cantilevers when possible. Greater surface area implant designs made of titanium alloy and with an external hex design can also prove advantageous. Anterior guidance in mandibular excursions further decreases force and eliminates or reduces lateral posterior force. Metal occlusal surfaces decrease the risk of porcelain fracture and do not require as much abutment reduction, which in turn enhances prosthesis retention. The retention of the final prosthesis or super-structure is also improved with additional implant abutments. Night guards designed with specific features also are a benefit to initially diagnose the influence of occlusal factors for the patient, and as importantly, to reduce the influence of extraneous stress on implants and implant-retained restorations.

  8. Peripheral giant cell granuloma associated with dental implants: clinical case and literature review.

    Science.gov (United States)

    Peñarrocha-Diago, Maria A; Cervera-Ballester, Juan; Maestre-Ferrín, Laura; Peñarrocha-Oltra, David

    2012-09-01

    Peripheral giant cell granuloma (PGCG) associated to dental implants is a very infrequent peri-implant soft-tissue complication, with only 11 cases recorded in the literature to date. The present study describes a 54-year-old woman presenting a swelling of the alveolar margin in the fourth quadrant in relation to a fixed prosthesis cemented over implants. Treatment consisted of complete resection of the lesion with implantoplasty of the exposed implant threads. The diagnosis of PGCG was confirmed by histological study, and no relapse has been recorded after 12 months of follow-up.

  9. Predictable dental rehabilitation in maxillomandibular reconstruction with free flaps. The role of implant guided surgery.

    Science.gov (United States)

    Cebrian-Carretero, José-Luis; Guiñales-Díaz de Cevallos, Jorge; Sobrino, José-Andrés; Yu, Tomás; Burgueño-García, Miguel

    2014-11-01

    The reconstruction of maxillomandibular defects secondary to oral cancer surgery, represent a great challenge for Maxillofacial surgeons. During the last decades the reconstructive surgery has experimented a big advance due to the development of the microsurgical techniques. At present, we are able to reconstruct complex defects using free flaps that provide both soft and bone tissue. Fibula, iliac crest and scapula free flaps have been the three classic options for the maxillomandibular reconstruction owing to the amount of bone that this flaps provide, allowing the posterior dental rehabilitation with implants. Today, our objective it is not only the aesthetic reconstruction, but also the functional reconstruction of the patients enhancing their life quality. Guided implant surgery in free flap reconstructed patients has become an essential tool, helping to define the exact position of the dental implant in the flap. In this way it is possible to look for the areas with better bone conditions, avoiding the osteosynthesis material used to fixate the flap with the native bone and deciding the best biomechanical option, in terms of number and situation of the implants, for the future dental prostheses. In summary, using the guided implant surgery, it is possible to design an exact and predictable dental implant rehabilitation in patients with oral cancer who are reconstructed with free microvascular flap, resulting in an optimal aesthetic and functional result.

  10. Finite element analysis of the dental implant using a topology optimization method.

    Science.gov (United States)

    Chang, Chih-Ling; Chen, Chen-Sheng; Huang, Chang-Hung; Hsu, Ming-Lun

    2012-09-01

    In recent years, many attempts have been made to optimize the shape of dental implants. The purpose of this study took advantage of the topology optimization in the finite element (FE) method to look for redundant material distribution on a dental threaded implant and redesigned a new implant macrogeometry with the evaluation of its biomechanical functions. Three-dimensional FE models were created of a first molar section of the maxilla and embedded with an implant, abutment and a superstructure by using the commercial software ANSYS 11.0. The final design of a new implant was shaped by topology optimization, and four FE models namely traditional implants with bonded (TB) and contact (TC) interfaces, and new implants with bonded (NB) and contact (NC) interfaces, were established. Material properties of compact and cancellous bone were modeled as fully orthotropy and transversely isotropy respectively. Oblique (200-N vertical and 40-N horizontal) occlusal loading was applied on the central and distal fossa of the crown. The FE model estimated that the volume of the new implant could be reduced by 17.9% of the traditional one and the biomechanical performances were similar, such as the stress of the implant, stress of the implant-bone complex, lower displacement, and greater stiffness than the traditional implant. The advantages of the new implant increased the space to allow more new bone ingrowth or assist in fusing more bone graft into the bone sustaining the implant stability and saved material. Its disadvantage was higher stress level compared with that of the traditional implant. Copyright © 2012 IPEM. Published by Elsevier Ltd. All rights reserved.

  11. Success rate of short dental implants supporting single crowns and fixed bridges.

    Science.gov (United States)

    Malmstrom, Hans; Gupta, Bhumija; Ghanem, Alexis; Cacciato, Rita; Ren, Yanfang; Romanos, Georgios E

    2016-09-01

    Bone grafts (sinus lift and/or ridge augmentation) may become an obstacle for some patients who desire implant treatment. The objective of this study was to evaluate the success of six- and eight-millimeters rough surface design short dental implants, for up to 2 years in function, when compared to conventional length (11 mm) implants. A total of 25.6-, 20.8- and 35.11-mm length implants were placed and restored in 30 subjects (11 males, 19 females) between the age of 22 and 80, following a standard protocol. Implant mobility, crestal bone loss as well as periodontal parameters were evaluated immediately after restoration placement, at 6, 12 and 24 months. There was one failure of one 6-mm implant during the healing phase and one restorative failure. The median crestal bone loss at 24 months was 0.45 mm for the 6-mm implants, 0.55 mm for the 8 mm implants and 0.65 mm for the 11-mm implants. The success rate for 6-mm implants was 97% and for 8-mm and 11-mm implants 100%. Based on this preliminary data, we conclude that rough surface design short dental implants (6 and 8 mm in length) have similar success rate when compared to 11-mm implants. Long-term data with larger number of implants and subjects are needed to confirm these results. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  12. [Dental implantation and soft tissue augmentation after ridge preservation in a molar site: a case report].

    Science.gov (United States)

    Zhao, L P; Zhan, Y L; Hu, W J; Wang, H J; Wei, Y P; Zhen, M; Xu, T; Liu, Y S

    2016-12-18

    For ideal implant rehabilitation, an adequate bone volume, optical implant position, and stable and healthy soft tissue are required. The reduction of alveolar bone and changes in its morphology subsequent to tooth extraction will result in insufficient amount of bone and adversely affect the ability to optimally place dental implants in edentulous sites. Preservation of alveolar bone volume through ridge preservation has been demonstrated to reduce the vertical and horizontal contraction of the alveolar bone crest after tooth extraction and reduce the need for additional bone augmentation procedures during implant placement. In this case, a patient presented with a mandible molar of severe periodontal disease, the tooth was removed as atraumatically as possible and the graft material of Bio-Oss was loosely placed in the alveolar socket without condensation and covered with Bio-Gide to reconstruct the defects of the alveolar ridge. Six months later, there were sufficient height and width of the alveolar ridge for the dental implant, avoiding the need of additional bone augmentation and reducing the complexity and unpredictability of the implant surgery. Soft tissue defects, such as gingival and connective tissue, played crucial roles in long-term implant success. Peri-implant plastic surgery facilitated development of healthy peri-implant structure able to withstand occlusal forces and mucogingival stress. Six months after the implant surgery, the keratinized gingiva was absent in the buccal of the implant and the vestibular groove was a little shallow. The free gingival graft technique was used to solve the vestibulum oris groove supersulcus and the absence of keratinized gingiva around the implant. The deepening of vestibular groove and broadening of keratinized gingiva were conducive to the long-term health and stability of the tissue surrounding the implant. Implant installation and prosthetic restoration showed favorable outcome after six months.

  13. Removal of a Dental Implant Displaced into the Maxillary Sinus by Means of the Bone Lid Technique

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    Pietro Fusari

    2013-01-01

    Full Text Available Background. Rehabilitation of edentulous jaws with implant-supported prosthesis has become a common practice among oral surgeons in the last three decades. This therapy presents a very low incidence of complications. One of them is the displacement of dental implants into the maxillary sinus. Dental implants, such as any other foreign body into the maxillary sinus, should be removed in order to prevent sinusitis. Methods. In this paper, we report a case of dental implant migrated in the maxillary sinus and removed by means of the bone lid technique. Results and Conclusion. The migration of dental implants into the maxillary sinus is rarely reported. Migrated implants should be considered for removal in order to prevent possible sinusal diseases. The implant has been removed without any complications, confirming the bone lid technique to be safe and reliable.

  14. Frequency of Dental Implants Placed in the Esthetic Zone in Dental Clinic of Tehran University: A Descriptive Study

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    Amir Alireza Rasouli Ghahroudi

    2016-08-01

    Full Text Available Objectives: Anterior maxilla, known as the esthetic zone, plays an important role in facial and smile esthetics. This study assessed the frequency of implant treatments in the esthetic zone of patients presenting to Dental Implant Department of Tehran University during 2002-2012.Materials and Methods: This descriptive study was conducted on dental records of patients receiving implant treatment during 2002-2012. Patient records were retrieved from the archives and patient demographics, implant characteristics, failure rate, prevalence of complications and implant systems were collected. The data were reported as frequency and percentage.Results: Of a total of 2,381 implants placed in the mentioned time period, 492 (20.8% had been placed in the anterior maxilla and 531 (22.3% had been placed in the anterior mandible from canine to canine.  Timing of implant placement was immediate in 12.0%, early in 0.5% and late in 87.4%. Survival rate was 99.1%. Rate of failure was 0.8%. Failure rate was 0.4% in the maxillary and 1.1% in the mandibular canine to canine region. Complications were reported in 10.1% of patients. Rate of complications was 18.3% in the maxillary canine to canine, 8.9% in the mandibular canine to canine, 18.1% in the maxillary first premolar to first premolar and 9.5% in the mandibular first premolar to first premolar. The frequency of bone grafts placed in these areas was 17.6%, 33.9%, 13.6%, 32.1% and 14.3%, respectively.Conclusion: Of implants placed in our center, around 20% were in the anterior maxilla, and delayed implant placement was the most commonly adopted technique.

  15. Crestal bone loss around submerged and nonsubmerged dental implants: A systematic review.

    Science.gov (United States)

    Al Amri, Mohammad D

    2016-05-01

    To my knowledge, there is no systematic review of crestal bone loss (CBL) around submerged and nonsubmerged dental implants. The purpose of this review was to systematically assess CBL around submerged and nonsubmerged dental implants. The addressed focused question was, "Does crestal and subcrestal placement of dental implants influence crestal bone levels?" Databases were searched from 1986 through October 2015 using different combinations of the following keywords: crestal, sub-crestal, bone loss, dental implant, submerged, and nonsubmerged. Reference lists of potentially relevant original and review articles were hand-searched to identify any further studies. Letters to the editor, case reports, commentaries, studies on platform-switched implants, and studies published in languages other than English were excluded. In total, 13 studies (6 human and 7 animal), which were performed at universities, were included. In the human studies, the number of participants ranged from 8 to 84 individuals. The follow-up period ranged from 1 to 5 years. CBL at the test sites ranged from 0.17 mm to 0.9 mm and at control sites from 0.02 mm to 1.4 mm. Five human studies reported no significant difference in CBL around implants placed at the test and control sites. All animal studies were performed in dogs with a mean age ranging from 1 to approximately 2 years. The follow-up period ranged from 2 to 6 months. Four animal studies reported no significant difference in CBL around submerged and nonsubmerged implants. No significant difference in CBL was found around submerged and nonsubmerged dental implants. Copyright © 2016 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.

  16. Survival analysis of dental implants and implant-retained prostheses in oral cancer patients up to 20 years.

    Science.gov (United States)

    Doll, Christian; Nack, Claudia; Raguse, Jan-Dirk; Stricker, Andres; Duttenhoefer, Fabian; Nelson, Katja; Nahles, Susanne

    2015-07-01

    The purpose of this study was to evaluate the long-term survival rate and potential influencing factors of dental implants and implant-retained prostheses in oral cancer patients who had undergone surgical tumor resection. In the present study, 157 patients (95 females and 62 males with a mean age of 53.7 years) with 830 implants were included. All patients were diagnosed with a malignant tumor in the oral cavity and had undergone ablative surgery. In 55 patients (292 implants), the surgical procedure was followed by an additional radiochemotherapy (RCT) before implant placement. Nicotine users who received RCT were excluded from this study. Patients were clinically examined every 6 or 12 months according to a standard procedure. Of the 830 examined implants, 450 were placed in the maxilla and 380 in the mandible. A total of 65 implants were lost, 36 in the maxilla and 29 in the mandible; of these, 42 implants (65%) were documented as lost due to the patient's death. The mean observation period was 121 months. The cumulative survival rate was 94.9% at 3 years and 92.5% at 7 years. With an observation period up to 20 years, the cumulative survival rate remained constant after 11 years with 90.8%. Age, gender, and localization (maxilla/mandible) of implants did not show any influence on the survival of the implants. However, radiochemotherapy was determined as a significant factor influencing the survival rate. The results of this study demonstrate that the survival rate of implants was significantly lower in oral cancer patients who had been treated by ablative surgery and additional radiochemotherapy than in patients without RCT. Since there is no significant difference in the mortality rate of patients with additional RCT compared to patients who underwent sole ablative surgery, the higher loss ratio is due to a late failure of osseointegration. Dental implants in oral cancer patients who had been treated by ablative surgery show a high and steady cumulative

  17. Dental Implant Stability Analysis and Investigating the Influence of Efective Factors on Bone-Implant Contact Applying Frictional Model of Contact

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    Atefi E

    2011-12-01

    Full Text Available Background and Aims: Relative displacement of the implant with respect to bone and quality of bone-implant contact play critical roles in the dental implant stability. The goal of this study was to investigate the dental implant stability using non-linear finite elements method. Therefore, bone-implant relative displacement due to applied force to the implant was calculated, and then an appropriate factor for defining quality of bone-implant contact was presented.Materials and Methods: In order to develop a three dimensional model and compare the results with clinical studies, computed tomography (CT scan data of a rabbit tibia was considered as a base. The model was exported to ABAQUS 6.9-1 to be analyzed using nonlinear finite elements method. Dynamic analysis was done on the model using the proper boundary condition and dynamic loads.Results: Force-displacement curves in bone-implant interface were nonlinear. Friction coefficient, which is a criterion for implant stability and relative displacement, approximately became doubled as the vertical contact force was halved. However, the friction coefficient decreased with reduction of coulomb frictional coefficient.Conclusion: Friction coefficient, which is calculated upon force-displacement curves, could be considered as a criterion to evaluate the dental implant stability. Decrease of the vertical contact force and also using rough surfaces improved the quality of bone-implant contact and stability of dental implant.

  18. Dental floss as a possible risk for the development of peri-implant disease: an observational study of 10 cases.

    Science.gov (United States)

    van Velzen, Frank J J; Lang, Niklaus P; Schulten, Engelbert A J M; Ten Bruggenkate, Christiaan M

    2016-05-01

    To report on a possible relationship between the use of dental floss or superfloss and the development of peri-implantitis. Ten patients with progressive peri-implantitis with an intensive oral hygiene protocol, which consisted of extensive professional supra- and submucosal cleaning, and not responding to this therapy were scheduled for examination. Plaque and bleeding indices and probing depth measurements were assessed, and radiographic examination was performed every two years. In all ten cases, remnants of dental floss were found around the neck and coronal part of a dental implant. After careful removal of these floss remnants and implant cleansing, a significant improvement in the peri-implant conditions in nine of ten cases was noted. In one case, peri-implant probing depth decreased substantially. However, bleeding on probing was still present. In vitro testing yielded that the application of various types of dental floss on the exposed rough implant surfaces may easily lead to tearing of floss fibers. This may result in the deposition of floss remnants on rough implant surfaces, which, in turn, may lead to the development of plaque-related peri-implant inflammation and, subsequently, bone loss. In case of exposed rough surfaces of the dental implant, the peri-implant conditions may be jeopardized by the application of dental floss, and hence, the utilization of interproximal brushes or toothpicks may be preferred for daily home care practices. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  19. Evaluation of design parameters of eight dental implant designs: A ...

    African Journals Online (AJOL)

    Aim: Implants could be considered predictable tools for replacing missing teeth or teeth that are irrational to treat. Implant macrodesign includes thread, body shape and thread design. Implant threads should be designed to maximize the delivery of optimal favorable stresses. The aim of this finite element model study was to ...

  20. Retrospective analysis of 56 edentulous dental arches restored with 344 single-stage implants using an immediate loading fixed provisional protocol: statistical predictors of implant failure.

    Science.gov (United States)

    Kinsel, Richard P; Liss, Mindy

    2007-01-01

    The purpose of this retrospective study was to evaluate the effects of implant dimensions, surface treatment, location in the dental arch, numbers of supporting implant abutments, surgical technique, and generally recognized risk factors on the survival of a series of single-stage Straumann dental implants placed into edentulous arches using an immediate loading protocol. Each patient received between 4 and 18 implants in one or both dental arches. Periapical radiographs were obtained over a 2- to 10-year follow-up period to evaluate crestal bone loss following insertion of the definitive metal-ceramic fixed prostheses. Univariate tests for failure rates as a function of age ( or = 60 years), gender, smoking, bone grafting, dental arch, surface type, anterior versus posterior, number of implants per arch, and surgical technique were made using Fisher exact tests. The Cochran-Armitage test for trend was used to evaluate the presence of a linear trend in failure rates regarding implant length and implant diameter. Logistic regression modeling was used to determine which, if any, of the aforementioned factors would predict patient and implant failure. A significance criterion of P = .05 was utilized. Data were collected for 344 single-stage implants placed into 56 edentulous arches (39 maxillae and 17 mandibles) of 43 patients and immediately loaded with a 1-piece provisional fixed prosthesis. A total of 16 implants failed to successfully integrate, for a survival rate of 95.3%. Increased rates of failure were associated with reduced implant length, placement in the posterior region of the jaw, increased implant diameter, and surface treatment. Implant length emerged as the sole significant predictor of implant failure. In this retrospective analysis of 56 consecutively treated edentulous arches with multiple single-stage dental implants loaded immediately, reduced implant length was the sole significant predictor of failure.

  1. Outcome after placement of tantalum porous engineered dental implants in fresh extraction sockets: a canine study.

    Science.gov (United States)

    Lee, Jin Whan; Wen, Hai Bo; Battula, Suneel; Akella, Rama; Collins, Michael; Romanos, Georgios E

    2015-01-01

    This study evaluated the stability and histologic proof of osseoincorporation of Trabecular Metal (TM) dental implants, which feature a tantalum-based porous midsection. A total of 48 TM implants (test group) and Tapered Screw-Vent implants (control group) were immediately placed bilaterally into mandibular extraction sockets in dogs. Resonance frequency analysis was performed at weeks 0, 2, 4, and 12 after implant placement. Histologic and histomorphometric evaluations of the implant interface were performed. Changes in mean implant stability quotients (ISQ) revealed no statistical differences between the test and control groups. Histologic analysis showed bone ingrowth into the porous tantalum structure of all test group implants. Histomorphometric analysis revealed an increased percentage of bone-to-implant contact between 4 and 8 weeks in both test and control groups. The porous sections of the test group exhibited significantly more new bone inside the pores at week 12 in comparison to weeks 2 and 4. No correlation was observed between ISQ and histomorphometric parameters. In a canine immediate extraction socket model, both test and control implants demonstrated comparable implant stability and bone-to-implant contact. Bone ingrowth was evident within the tantalum porous section of the test implants during the early healing.

  2. Bone ingrowth and initial stability of titanium and porous tantalum dental implants: a pilot canine study.

    Science.gov (United States)

    Kim, Do-Gyoon; Huja, Sarandeep S; Tee, Boon Ching; Larsen, Peter E; Kennedy, Kelly S; Chien, Hua-Hong; Lee, Jin Whan; Wen, Hai Bo

    2013-08-01

    To investigate if a dental implant system with a midsection covered by 3-dimensionally porous tantalum material would exhibit stability comparable with a traditional threaded titanium alloy implant system and whether bone would grow into the porous section. Three experimental and 3 control implants were placed in the individual mandibles of 8 dogs. Resonance frequency analysis assessed implant stability at 0, 2, 4, 8, and 12 weeks of healing. Histomorphometric and backscattered scanning electron microscopic analyses examined the presence of bone ingrowth into the experimental implant's porous section and bone-to-implant contact along the titanium surfaces of both implants. Implant stability did not significantly differ during 0 to 12 weeks of healing. Progressive tissue mineralization developed inside porous sections from weeks 2 to 12. Porous implants exhibited a combination of progressive osseointegration along their titanium surfaces and bone ingrowth inside their porous tantalum sections. Cortical and apical implant threads, combined with the porous section, were able to stabilize the experimental implant to the same degree as the fully threaded control implant.

  3. Experimental investigation of commercial small diameter dental implants in porcine mandibular segments.

    Science.gov (United States)

    Hasan, Istabrak; Heinemann, Friedhelm; Schwegmann, Monika; Keilig, Ludger; Stark, Helmut; Bourauel, Christoph

    2017-02-01

    Small diameter (mini) dental implants have become more popular in recent years as alternatives to classical implant treatment in clinical cases with critical bony situations. However, an in-depth scientific analysis of the mechanical and biomechanical effects of small diameter implants has not yet been published. The aim of the present study was to investigate experimentally different commercial mini implants by measuring their displacements under immediate loading. Twelve commercially available mini implants were measured. Implants were inserted into porcine mandibular segments and loaded by means of a predefined displacement of 0.5 mm of the loading system. The implants were loaded at an angle of 30° to the implant long axis using the self-developed biomechanical hexapod measurement system. Implant displacements were registered. The experimental results were compared to the numerical ones from a previous study. Measured implant displacements were within the range of 39-194 μm. A large variation in the displacements was obtained among the different implant systems due to the different designs and thread profiles. Comparing experimental and numerical results, the displacements that were obtained numerically were within the range of 79-347 μm. The different commercial mini implants showed acceptable primary stability and could be loaded immediately after their insertion.

  4. Analysis of risk factors for cluster behavior of dental implant failures.

    Science.gov (United States)

    Chrcanovic, Bruno Ramos; Kisch, Jenö; Albrektsson, Tomas; Wennerberg, Ann

    2017-08-01

    Some studies indicated that implant failures are commonly concentrated in few patients. To identify and analyze cluster behavior of dental implant failures among subjects of a retrospective study. This retrospective study included patients receiving at least three implants only. Patients presenting at least three implant failures were classified as presenting a cluster behavior. Univariate and multivariate logistic regression models and generalized estimating equations analysis evaluated the effect of explanatory variables on the cluster behavior. There were 1406 patients with three or more implants (8337 implants, 592 failures). Sixty-seven (4.77%) patients presented cluster behavior, with 56.8% of all implant failures. The intake of antidepressants and bruxism were identified as potential negative factors exerting a statistically significant influence on a cluster behavior at the patient-level. The negative factors at the implant-level were turned implants, short implants, poor bone quality, age of the patient, the intake of medicaments to reduce the acid gastric production, smoking, and bruxism. A cluster pattern among patients with implant failure is highly probable. Factors of interest as predictors for implant failures could be a number of systemic and local factors, although a direct causal relationship cannot be ascertained. © 2017 Wiley Periodicals, Inc.

  5. Mecanobiología de la interfase hueso-implante dental

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    Juan Carlos Vanegas Acosta

    2010-03-01

    Full Text Available La osteointegración es la conexión estructural y funcional entre el hueso y un implante. Cuando un implante se inserta en el hueso, se crea la denominada interfase hueso-implante, una zona de unión entre la superficie del biomaterial del implante y el hueso circundante. La cicatrización de esta interfase depende de las condiciones biológicas del hueso, las características de diseño del implante y la distribución de cargas entre hueso e implante. En este artículo se hace una revisión del proceso de cicatrización de la interfase hueso-implante para el caso de un implante dental. El objetivo es describir la secuencia de eventos biológicos iniciados con la lesión causada por la inserción del implante y que concluyen con la formación de nuevo hueso en la interfase. Esta descripción incluye una novedosa clasificación de los fenómenos mecánicos que intervienen durante el proceso de cicatrización de los tejidos lesionados. Esta descripción mecanobiológica de la interfase hueso-implante dental se utiliza para determinar las características más relevantes a tener en cuenta en la formulación de un modelo matemático de la osteointegración de implantes dentales.

  6. Random spectrum loading of dental implants: An alternative approach to functional performance assessment.

    Science.gov (United States)

    Shemtov-Yona, K; Rittel, D

    2016-09-01

    The fatigue performance of dental implants is usually assessed on the basis of cyclic S/N curves. This neither provides information on the anticipated service performance of the implant, nor does it allow for detailed comparisons between implants unless a thorough statistical analysis is performed, of the kind not currently required by certification standards. The notion of endurance limit is deemed to be of limited applicability, given unavoidable stress concentrations and random load excursions, that all characterize dental implants and their service conditions. We propose a completely different approach, based on random spectrum loading, as long used in aeronautical design. The implant is randomly loaded by a sequence of loads encompassing all load levels it would endure during its service life. This approach provides a quantitative and comparable estimate of its performance in terms of lifetime, based on the very fact that the implant will fracture sooner or later, instead of defining a fatigue endurance limit of limited practical application. Five commercial monolithic Ti-6Al-4V implants were tested under cyclic, and another 5 under spectrum loading conditions, at room temperature and dry air. The failure modes and fracture planes were identical for all implants. The approach is discussed, including its potential applications, for systematic, straightforward and reliable comparisons of various implant designs and environments, without the need for cumbersome statistical analyses. It is believed that spectrum loading can be considered for the generation of new standardization procedures and design applications. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. Prospective, 1-year observational study of double-threaded tapered body dental implants with immediate loading.

    Science.gov (United States)

    Kim, Tae Hyung; Knezevic, Alena; Jorgensen, Michael; Rich, Sandra; Nowzari, Hessam

    2015-07-01

    Unlike conventional loading protocols, the immediate loading of single implants has not been fully investigated. The purpose of this study was to assess the prosthetic and esthetic periimplant mucosal outcomes of immediately restored dental implants during a 1-year follow-up. Twenty participants meeting the established inclusion criteria received double-threaded, tapered body dental implants (SuperLine; Dentium). Implants were placed and stabilized at a minimum of 35 Ncm of torque and restored immediately after the surgery with interim restorations. These were replaced with definitive restorations 6 months after implant placement. Clinical measurements at each visit included resonance frequency analysis, the evaluation of the participants' oral health (gingival and plaque indices), and the esthetic outcome of the interim or definitive restoration. Implants placed in this clinical study had a 100% success rate. The oral health and esthetic outcomes were favorable for all participants. Double-threaded, tapered body dental implants that were placed and immediately restored with fixed interim prostheses and with definitive prostheses after 6 months remained stable and functional after 1 year. Copyright © 2015 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.

  8. Superior biofunctionality of dental implant fixtures uniformly coated with durable bioglass films by magnetron sputtering.

    Science.gov (United States)

    Popa, A C; Stan, G E; Enculescu, M; Tanase, C; Tulyaganov, D U; Ferreira, J M F

    2015-11-01

    Bioactive glasses are currently considered the suitable candidates to stir the quest for a new generation of osseous implants with superior biological/functional performance. In congruence with this vision, this contribution aims to introduce a reliable technological recipe for coating fairly complex 3D-shaped implants (e.g. dental screws) with uniform and mechanical resistant bioactive glass films by the radio-frequency magnetron sputtering method. The mechanical reliability of the bioactive glass films applied to real Ti dental implant fixtures has been evaluated by a procedure comprised of "cold" implantation in pig mandibular bone from a dead animal, followed by immediate tension-free extraction tests. The effects of the complex mechanical strains occurring during implantation were analysed by scanning electron microscopy coupled with electron dispersive spectroscopy. Extensive biocompatibility assays (MTS, immunofluorescence, Western blot) revealed that the bioactive glass films stimulated strong cellular adhesion and proliferation of human dental pulp stem cells, without promoting their differentiation. The ability of the implant coatings to conserve a healthy stem cell pool is promising to further endorse the fabrication of new osseointegration implant designs with extended lifetime. Copyright © 2015 Elsevier Ltd. All rights reserved.

  9. Biological aspects of dental implant; Current knowledge and perspectives in oral implantology

    Directory of Open Access Journals (Sweden)

    Sukant Sahoo

    2013-01-01

    Full Text Available The utilization of dental implants became a scientifically accepted treatment modality for the rehabilitation of fully and partially edentulous patients. The evolution of dental implants has completely changed dentistry. Implants can offer a number of benefits, from improved esthetics, to reducing bone loss, to improving denture retention for edentulous patients. Branemark et al., was the first person to examined submerged titanium implants with a machined surface in dogs and later called this procedure as osseointegration, which is now defined as "A direct structural and functional connection between ordered, living bone and the surface of a load-bearing implant." Commercially pure titanium is recognized today as a material of choice, since it is characterized by excellent biological and also good mechanical properties. In this comprehensive review, authors have sought to explore various biological aspects of dental implant as pertinent to clinical procedure so as to provide research foundation for the establishment of suitable strategies that can assist in successful implant therapy.

  10. The effect of mucosal cuff shrinkage around dental implants during healing abutment replacement.

    Science.gov (United States)

    Nissan, J; Zenziper, E; Rosner, O; Kolerman, R; Chaushu, L; Chaushu, G

    2015-10-01

    Soft tissue shrinkage during the course of restoring dental implants may result in biological and prosthodontic difficulties. This study was conducted to measure the continuous shrinkage of the mucosal cuff around dental implants following the removal of the healing abutment up to 60 s. Individuals treated with implant-supported fixed partial dentures were included. Implant data--location, type, length, diameter and healing abutments' dimensions--were recorded. Mucosal cuff shrinkage, following removal of the healing abutments, was measured in bucco-lingual direction at four time points--immediately after 20, 40 and 60 s. anova was used to for statistical analysis. Eighty-seven patients (49 women and 38 men) with a total of 311 implants were evaluated (120 maxilla; 191 mandible; 291 posterior segments; 20 anterior segments). Two-hundred and five (66%) implants displayed thick and 106 (34%) thin gingival biotype. Time was the sole statistically significant parameter affecting mucosal cuff shrinkage around dental implants (P < 0.001). From time 0 to 20, 40 and 60 s, the mean diameter changed from 4.1 to 4.07, 3.4 and 2.81 mm, respectively. The shrinkage was 1%, 17% and 31%, respectively. The gingival biotype had no statistically significant influence on mucosal cuff shrinkage (P = 0.672). Time required replacing a healing abutment with a prosthetic element should be minimised (up to 20/40 s), to avoid pain, discomfort and misfit. © 2015 John Wiley & Sons Ltd.

  11. Current status of implant prosthetics in Japan: a survey among certified dental lab technicians.

    Science.gov (United States)

    Hagiwara, Yoshiyuki; Narita, Tatsuya; Shioda, Yohei; Iwasaki, Keisuke; Ikeda, Takayuki; Namaki, Shunsuke; Salinas, Thomas J

    2015-12-01

    There are many implant cases in which dental technicians take initiative with regard to the design of implant prostheses, and to a certain extent, this area of care is one in which dentists do not necessarily play the leading role. Moreover, inadequate communication between dental technicians and dentists and insufficient instructions for technicians has been highlighted as issues in the past. The purpose of this questionnaire is to improve the quality of implant prostheses and thereby contribute to patient service by clarifying, among other aspects of treatment, problem areas and considerations in the fabrication of implant prostheses, conceptual-level knowledge, and awareness of prosthodontics on the part of the dentists in charge of treatment and methods for preventing prosthetic complications. A cross-sectional survey was given to 120 certified dental technicians. To facilitate coverage of a broad range of topics, we classified the survey content into the following four categories and included detailed questions for (1) the conditions under which implant technicians work, (2) implant fixed prostheses, (3) implant overdentures, and (4) prosthetic complications. Out of 120 surveys sent, 74 technicians responded resulting in a response rate of 61.6%. This survey served to clarify the current state of implant prosthodontics, issues, and considerations in the fabrication of implant prostheses, and the state of prosthetic complications and preventive initiatives, all from a laboratory perspective. The results of this survey suggested that, to fabricate prostheses with a high level of predictability, functional utility, and aesthetic satisfaction, it is necessary to reaffirm the importance for dentists to increase their prosthetic knowledge and work together with dental technicians to develop comprehensive treatment plans, implement an organized approach to prosthesis design, and accomplish occlusal reconstruction.

  12. The influence of smoking on 3-year clinical success of osseointegrated dental implants.

    Science.gov (United States)

    Lambert, P M; Morris, H F; Ochi, S

    2000-12-01

    Health risks associated with smoking have been exhaustively documented and include increased incidence of periodontal disease, greater risk of osteitis following oral surgery, and compromised wound healing due to hypoxia. Information related directly to dental implants, although limited, points to higher rates of implant failures among smokers than non-smokers. This paper reports on long-term clinical outcomes of osseointegrated dental implants placed in smokers and non-smokers in a longitudinal clinical study of endosseous dental implants. In 1990, the Dental Implant Clinical Research Group (DICRG) of the Department of Veterans Affairs (DVA) launched an 8-year, randomized, prospective clinical study of more than 2,900 endosseous dental implants in more than 800 patients at 32 study centers. Confounding variables, including smoking patterns, were recorded. For this report, new follow-up data were analyzed for two groups: 1) current smokers and 2) those who never smoked combined with those who quit. Most of the variables recorded for each implant were screened on a univariate basis as possible predictors associated with implant survival/failure. Those with P values less than 0.15 and those likely to be a factor of clinical importance were placed in a logistic regression equation and analyzed for a simultaneous effect on survival. A step-wise procedure was used to eliminate those variables that showed the least significance, until only those variables with a Wald chi-square of significance in the presence of others remained. The effects of clustering within patients and of unbalanced distribution within hospitals were standardized to facilitate analysis of influence of demographic variables. The GEE analysis was performed with the patient as the primary cluster. Current data do not support earlier findings that smoking contributes to early implant failure (placement to uncovering). A trend of greater failures in smokers appeared between the time after uncovering and

  13. Patients' experiences of dental implant treatment: A literature review of key qualitative studies.

    Science.gov (United States)

    Kashbour, W A; Rousseau, N S; Ellis, J S; Thomason, J M

    2015-07-01

    To identify and summarise the findings of previous qualitative studies relating to patients' experience of dental implant treatment (DIT) at various stages of their implant treatment, by means of textual narrative synthesis. Original articles reporting patients' experience with dental implant were included. A two-stage search of the literature, electronic and hand search identified relevant qualitative studies up to July 2014. An extensive electronic search was conducted of databases including PubMed, Embase, Scopus, Web of Knowledge, Cochrane Database and Google Scholar. Included primary studies (n=10) used qualitative research methods and qualitative analysis to investigate patients' experiences with dental implants treatment. While the growing interest in implant treatment for the replacement of missing dentition is evident, it is essential to investigate patients' perceptions of different aspects of implant treatment. This textual narrative synthesis conducted to review qualitative studies which provided insight into patients' experience of two types of implant prostheses namely ISOD (implant-supported overdenture) and FISP (fixed implant supported prostheses). Primary reviewed studies tended to include samples of older patients with more extensive tooth loss, and to focus on experiences prior to and post-treatment rather than on the treatment period itself. Findings across reviewed studies (n=10) suggested that patients with FISP thought of implant treatment as a process of 'normalisation'(1) and believed that such implant restorations could be similar to natural teeth, whereas patients with ISOD focused more on the functional and social advantages of their implant treatment. The growing interest in qualitative research is evident in several branches of clinical dentistry and dental implantology is not an exception. Qualitative studies concerning the patients account of their experience of dental implants is however limited. The aim of this review is to

  14. Use of allogeneic bone graft in maxillary reconstruction for installation of dental implants.

    Science.gov (United States)

    Gomes, Kelston Ulbricht; Carlini, João Luiz; Biron, Cássia; Rapoport, Abrão; Dedivitis, Rogério A

    2008-11-01

    The aim of this study is to evaluate the efficacy of the application of allogenous bone at the maxillomandibular reconstructions for future rehabilitation with dental implants. The patients were submitted to reconstruction of maxilla, using allogeneic bone grafts, in 3 different techniques: onlay grafts for lateral ridge augmentation, onlay and particulate bone for sinus lift grafting, and particulate alone for sinus lift grafts. Clinical and radiographic control was done at the postoperative phase for at least 8 months, until the patient could be submitted to the installation of dental implants. The results showed success in the majority of the cases, and dental implants could be installed. This can be considered an excellent alternative when compared with the use of autogenous grafts; because handling is easier, there is a great amount of material available and a possibility of using local anesthesia, and consequently there is a reduction of patient morbidity.

  15. Squamous cell carcinoma and dental implants: A systematic review of case reports.

    Science.gov (United States)

    Jeelani, S; Rajkumar, E; Mary, G Geena; Khan, Parvez Ahmad; Gopal, Harish; Roy, Soumya; Maheswaran, T; Anand, B

    2015-08-01

    Cancer is one of the leading causes of death world-wide. Apart from the most common etiopathological factors related to cancer, at times very rare causes such as irritant or foreign body induced carcinogenesis is not to be overlooked. To systematically review case reports concerned with the association between dental implants and oral squamous cell carcinoma. A Medline (PubMed), Cochrane database, and Google Scholar search was conducted of dental article published in English related to case reports concerned with oral squamous cell carcinoma occurring around dental implants from 2000 to 2014. Twenty articles were retrieved, which included 20 rare case reports which were systematically reviewed and the results were obtained pertaining to age, clinical symptoms, habits, previous history of cancer, potentially malignant disorders, systemic illness, and local factors. It is imperative to identify promptly persisting inflammation associated with implants. Since malignancy may disguise as periimplantitis, especially in patients who are at risk with contributing prominent predisposing factors.

  16. Dental implant placement with bone augmentation in a patient who received intravenous bisphosphonate treatment for osteoporosis.

    Science.gov (United States)

    Mattheos, Nikos; Caldwell, Patrick; Petcu, Eugen B; Ivanovski, Saso; Reher, Peter

    2013-01-01

    Intravenous (IV) administration of bisphosphonates has been considered an absolute contraindication for placement of dental implants, because of the increased risk of bisphosphonate-related osteonecrosis of the jaw (BRONJ). However, the evidence regarding this association originates from patients being treated for various forms of metastatic cancer. In the case reported here, a patient received a dental implant while undergoing IV treatment with zoledronic acid for osteoporosis. The authors discuss the current evidence regarding the risks of dental procedures in patients receiving IV bisphosphonates for this indication. They also evaluate important risk factors and the decision-making pathway in such cases. On the basis of existing evidence, receipt of a single IV infusion of zoledronic acid for the treatment of osteoporosis does not appear to be an absolute contraindication to implant placement.

  17. Early dental implant failure in patient associated with oral bisphosphonates

    Directory of Open Access Journals (Sweden)

    Ridhimaa Gupta

    2012-01-01

    Full Text Available Oral bisphosphonates are routinely prescribed to post menopausal women. These have shown to increase the risk of osteonecrosis. However, this action may be augmented by local factors. A case report is presented showing an early implant failure in a patient taking oral bisphosphonates. Two implants were placed in left maxillary incisor area. Central incisor was associated with a previous endodontic failure and extraction. Lateral incisor was avulsed 3 years back. After 4 weeks of an implant placement, necrotic bone was evident along with the failing implant in central incisor area. This case report emphasizes on the incidence and an increased risk of implant failure in patients taking oral bisphosphonates.

  18. Review of Immediate and Early Loading Protocols in Dental Implants

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    M Rismanchian

    2010-12-01

    Full Text Available Introduction: The concept of treating edentulous patients by osseointegrated implants was first proposed in 1960s. To minimize the failure rate of implants, it has been recommended to keep the implants free of load during the healing period .Recent studies have been directed to achieve faster integration and shorter healing periods prior to implant restoration. Loading protocols (immediate loading , early loading can best be interpreted on the biologic basis of implant integration. Each of these protocols needs special prerequisites and there are special risk factors for different loading protocols. Objectives: In this review article, different loading protocols and their surgical and prosthetic considerations are discussed.

  19. Comparative radiographic and resonance frequency analyses of the peri-implant tissue after dental implants placement using flap and flapless techniques: an experimental study on domestic pigs.

    Science.gov (United States)

    Vlahović, Zoran; Mihailović, Branko; Lazić, Zoran; Golubović, Mileta

    2013-06-01

    Flapless implant surgery has become very important issue during recent years, mostly thanks to computerization of dentistry and software planning of dental implants placements. The aim of this study was to compare flap and flapless surgical techniques for implant placement through radiographic and radiofrequency analyses. The experiment was made in five domestic pigs. Nine weeks following domestic pigs teeth extraction, implants were placed, on the right side using surgical technique flap, and flapless on the left side. Digital dental Xrays were applied to determine primary dental implant stability quality (ISQ). At certain intervals, not later than three months, the experimental animals were sacrificed, and just before it, control X-rays were applied to measure dental implants stability. Radiographic analysis showed that peri-implant bone resorption in the first 4 weeks following placement implants with flap and flapless surgical techniques was negligible. After the 3 months, mean value of peri-implant bone resorption of the implants placed using flap tehnique was 1.86 mm, and of those placed using flapless tehnique was 1.13 mm. In relation to the primary dental implant stability in the first and second week there was an expected decrease in ISQ values, but it was less expressed in the dental implants placed using the flapless technique. In the third week the ISQ values were increased in the dental implants placed by using both techniques, but the increase in flapless implant placement was higher (7.4 ISQ) than in flap implant placement (1.5 ISQ). The upward trend continued in a 4-week period, and after 3 months the dental implant stability values in the implants placed using flap technique were higher than the primary stability for 7.1 ISQ, and in the implants placed using flapless technique were higher comparing to the primary stability for 10.1 ISQ units. Based on the results of radiographic and resonance frequency analyses it can be concluded that the flapless

  20. Comparative radiographic and resonance frequency analyses of the peri-implant tissue after dental implants placement using flap and flapless techniques: An experimental study on domestic pigs

    Directory of Open Access Journals (Sweden)

    Vlahović Zoran

    2013-01-01

    Full Text Available Background/Aim. Flapless implant surgery has become very important issue during recent years, mostly thanks to computerization of dentistry and software planning of dental implants placements. The aim of this study was to compare flap and flapless surgical techniques for implant placement through radiographic and radiofrequency analyses. Methods. The experiment was made in five domestic pigs. Nine weeks following domestic pigs teeth extraction, implants were placed, on the right side using surgical technique flap, and flapless on the left side. Digital dental Xrays were applied to determine primary dental implant stability quality (ISQ. At certain intervals, not later than three months, the experimental animals were sacrificed, and just before it, control X-rays were applied to measure dental implants stability. Results. Radiographic analysis showed that peri-implant bone resorption in the first 4 weeks following placement implants with flap and flapless surgical techniques was negligible. After the 3 months, mean value of peri-implant bone resorption of the implants placed using flap technique was 1.86 mm, and of those placed using flapless technique was 1.13 mm. In relation to the primary dental implant stability in the first and second week there was an expected decrease in ISQ values, but it was less expressed in the dental implants placed using the flapless technique. In the third week the ISQ values were increased in the dental implants placed by using both techniques, but the increase in flapless implant placement was higher (7.4 ISQ than in flap implant placement (1.5 ISQ. The upward trend continued in a 4- week period, and after 3 months the dental implant stability values in the implants placed using flap technique were higher than the primary stability for 7.1 ISQ, and in the implants placed using flapless technique were higher comparing to the primary stability for 10.1 ISQ units. Conclusion. Based on the results of radiographic and

  1. Long-term success of dental implants in patients with head and neck cancer after radiation therapy.

    Science.gov (United States)

    Curi, M M; Condezo, A F B; Ribeiro, K D C B; Cardoso, C L

    2018-02-06

    The purpose of this study was to analyze the long-term success and factors potentially influencing the success of dental implants placed in patients with head and neck cancer who underwent radiation therapy with a minimum total dose of 50Gy during the years 1995-2010. Thirty-five patients (169 dental implants) were included in this study. Data on demographic characteristics, tumour type, radiation therapy, implant sites, implant dimensions, and hyperbaric oxygen therapy (HBOT) were obtained from the medical records and analyzed. Implant survival was estimated using Kaplan-Meier survival curves. Seventy-nine dental implants were placed in the maxilla and 90 in the mandible. The mean follow-up after implant installation was 7.4 years (range 0.3-14.7 years). The overall 5-year survival rate for all implants was 92.9%. Sex (P<0.001) and the mode of radiation therapy delivery (P=0.005) had a statistically significant influence on implant survival. Age, time of implantation after irradiation, implant brand and dimensions, and HBOT had no statistically significant influence on implant survival. Osseointegrated dental implants can be used successfully in the oral rehabilitation of patients with head and neck cancer with a history of radiation therapy. Risk factors such as sex and the mode of radiation therapy delivery can affect implant survival. Copyright © 2018 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  2. Survival of Dental Implants Placed in Grafted and Nongrafted Bone: A Retrospective Study in a University Setting.

    Science.gov (United States)

    Tran, Duong T; Gay, Isabel C; Diaz-Rodriguez, Janice; Parthasarathy, Kavitha; Weltman, Robin; Friedman, Lawrence

    2016-01-01

    To compare dental implant survival rates when placed in native bone and grafted sites. Additionally, risk factors associated with dental implant loss were identified. This study was based on the hypothesis that bone grafting has no effect on implant survival rates. A retrospective chart review was conducted for patients receiving dental implants at the University of Texas, School of Dentistry from 1985 to 2012. Exclusion criteria included patients with genetic diseases, radiation and chemotherapy, or an age less than 18 years. To avoid misclassification bias, implants were excluded if bone grafts were only done at the same time of placement. Data on age, sex, tobacco use, diabetes, osteoporosis, anatomical location of the implant, implant length and width, bone graft, and professional maintenance were collected for analysis. A total of 1,222 patients with 2,729 implants were included. The cumulative survival rates at 5 and 10 years were 92% and 87% for implants placed in native bone and 90% and 79% for implants placed in grafted bone, respectively. The results from multivariate analysis (Cox regression) indicated no significant difference in survival between the two groups; having maintenance therapy after implant placement reduced the failure rate by 80% (P dental implant survival rate when implants were placed in native bone or bone-grafted sites. Smoking and lack of professional maintenance were significantly related to increased implant loss.

  3. Prosthodontic rehabilitation of hypophosphatasia using dental implants: a review of the literature and two case reports.

    LENUS (Irish Health Repository)

    Lynch, C D

    2009-06-01

    There are reports in the literature of the various dental features of hypophosphatasia, especially where it affects the deciduous dentition. The descriptions include both the manifestations of the disorder and the subsequent patterns of tooth loss. There are fewer descriptions of the effects of hypophosphatasia on the permanent dentition and little information on the subsequent prosthodontic management of these patients, particularly in relation to the use of dental implants. The aim of this paper was to review the literature on the dental effects of hypophosphatasia, present two cases and describe how one of those patients, a young adult, was successfully rehabilitated using dental implants. That latter patient\\'s pattern of tooth loss as well as some histological and scanning electron microscopic findings of root cementum from the other case is also described.

  4. Management of Broken Dental Implant Abutment in a Patient with Bruxism: A Rare Case Report and Review of Literature.

    Science.gov (United States)

    Al-Almaie, Saad

    2017-01-01

    This rare case report describes prosthodontic complications resulting from a dental implant was placed surgically more distally in the area of the missing mandibular first molar with a cantilever effect and a crest width of >12 mm in a 59-year-old patient who had a history of bruxism. Fracture of abutment is a common complication in implant was placed in area with high occlusal forces. Inability to remove the broken abutment may most often end up in discarding the implant. Adding one more dental implant mesially to the previously placed implant, improvisation of technique to remove the broken abutment without sacrificing the osseointegrated dental implant, fabrication with cemented custom-made abutment to replace the broken abutment for the first implant, and the use of the two implants to replace a single molar restoration proved reliable and logical treatment solutions to avoid these prosthodontic complications.

  5. Management of broken dental implant abutment in a patient with bruxism: A rare case report and review of literature

    Directory of Open Access Journals (Sweden)

    Saad Al-Almaie

    2017-01-01

    Full Text Available This rare case report describes prosthodontic complications resulting from a dental implant was placed surgically more distally in the area of the missing mandibular first molar with a cantilever effect and a crest width of >12 mm in a 59-year-old patient who had a history of bruxism. Fracture of abutment is a common complication in implant was placed in area with high occlusal forces. Inability to remove the broken abutment may most often end up in discarding the implant. Adding one more dental implant mesially to the previously placed implant, improvisation of technique to remove the broken abutment without sacrificing the osseointegrated dental implant, fabrication with cemented custom-made abutment to replace the broken abutment for the first implant, and the use of the two implants to replace a single molar restoration proved reliable and logical treatment solutions to avoid these prosthodontic complications.

  6. Tooth replacements in young adults with severe hypodontia: Orthodontic space closure, dental implants, and tooth-supported fixed dental prostheses. A follow-up study.

    Science.gov (United States)

    Hvaring, Christina L; Øgaard, Bjørn; Birkeland, Kari

    2016-10-01

    Children with severe hypodontia have a substantial impairment of their dental health starting early in life. The purpose of this study was to describe types and locations of substitutes for missing teeth in patients with severe hypodontia and to compare the crown and soft tissue morphologies of orthodontic space closure, dental implants, and tooth-supported fixed dental prostheses for replacing teeth in the anterior region. Fifty patients missing 6 or more teeth and aged 18 years or older (mean age, 25.6 years) took part in a follow-up study. The patients were examined clinically with panoramic radiographs and clinical photographs. Crown and soft tissue variables (mucosal discoloration, crown morphology, color, and papilla index) were compared for orthodontic space closure, dental implant fixtures, and fixed dental prostheses. Dental implants, orthodontic space closure, and retaining deciduous teeth were the most commonly prescribed treatments. Persisting deciduous teeth showed a good survival rate at the follow-up examination. Mucosal discoloration was seen only for implant fixtures and was evident for almost all fixtures in the anterior mandible and two thirds of those in the anterior maxilla. The papilla index scored poorer for both implant fixtures and fixed dental prostheses compared with orthodontic space closure. Dental implants in the anterior region proved to be an inadequate treatment modality in patients with severe hypodontia because of pronounced mucosal discoloration. Copyright © 2016 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

  7. Design and manufacture of customized dental implants by using reverse engineering and selective laser melting technology.

    Science.gov (United States)

    Chen, Jianyu; Zhang, Zhiguang; Chen, Xianshuai; Zhang, Chunyu; Zhang, Gong; Xu, Zhewu

    2014-11-01

    Recently a new therapeutic concept of patient-specific implant dentistry has been advanced based on computer-aided design/computer-aided manufacturing technology. However, a comprehensive study of the design and 3-dimensional (3D) printing of the customized implants, their mechanical properties, and their biomechanical behavior is lacking. The purpose of this study was to evaluate the mechanical and biomechanical performance of a novel custom-made dental implant fabricated by the selective laser melting technique with simulation and in vitro experimental studies. Two types of customized implants were designed by using reverse engineering: a root-analog implant and a root-analog threaded implant. The titanium implants were printed layer by layer with the selective laser melting technique. The relative density, surface roughness, tensile properties, bend strength, and dimensional accuracy of the specimens were evaluated. Nonlinear and linear finite element analysis and experimental studies were used to investigate the stress distribution, micromotion, and primary stability of the implants. Selective laser melting 3D printing technology was able to reproduce the customized implant designs and produce high density and strength and adequate dimensional accuracy. Better stress distribution and lower maximum micromotions were observed for the root-analog threaded implant model than for the root-analog implant model. In the experimental tests, the implant stability quotient and pull-out strength of the 2 types of implants indicated that better primary stability can be obtained with a root-analog threaded implant design. Selective laser melting proved to be an efficient means of printing fully dense customized implants with high strength and sufficient dimensional accuracy. Adding the threaded characteristic to the customized root-analog threaded implant design maintained the approximate geometry of the natural root and exhibited better stress distribution and

  8. Indications and contraindications of dental implants in medically compromised patients: update

    OpenAIRE

    Gómez de Diego, Rafael; Mang de la Rosa, María Rocío; Romero Perez, María Jesús; Cutando Soriano, Antonio; López-Valverde Centeno, Antonio

    2014-01-01

    The aim of this study was to review the current scientific literature in order to analyse the indications and contraindications of dental implants in medically compromised patients. A reference research was carried out on PubMed using the key words “implant” AND (oral OR dental) AND (systemic disease OR medically compromised), in articles published between 1993 and 2013. The inclusion criteria were the following: clinical studies in which, at least, 10 patients were treated, consensus article...

  9. Squamous cell carcinoma and dental implants: A systematic review of case reports

    OpenAIRE

    Jeelani,S.; Rajkumar, E.; Mary, G. Geena; Khan, Parvez Ahmad; Gopal, Harish; Roy, Soumya; Maheswaran, T.; B Anand

    2015-01-01

    Cancer is one of the leading causes of death world-wide. Apart from the most common etiopathological factors related to cancer, at times very rare causes such as irritant or foreign body induced carcinogenesis is not to be overlooked. To systematically review case reports concerned with the association between dental implants and oral squamous cell carcinoma. A Medline (PubMed), Cochrane database, and Google Scholar search was conducted of dental article published in English related to case r...

  10. Dental implants in patients treated with oral bisphosphonates: a bibliographic review.

    Science.gov (United States)

    Montoya-Carralero, José-Maria; Parra-Mino, Pablo; Ramírez-Fernández, Piedad; Morata-Murcia, Isabel Maria; Mompeán-Gambín, Maria del Carmen; Calvo-Guirado, José-Luis

    2010-01-01

    Bisphosphonates inhibit bone resorption and are used to treat a range of pathologies, including Paget disease, osteoporosis, multiple myeloma and metastases associated with breast or prostate cancer. At present, there is no effective treatment for bisphosphonate induced osteonecrosis, so prevention is extremely important. Since quality of life deteriorates for those suffering osteonecrosis, maximum precautions should be taken with patients at risk, and especially whenever oral surgery, including dental implant placement, is contemplated. Dentists and oral or maxillofacial surgeons must keep up to date with the latest approaches to prevention, particularly when treating patients who are presently taking, or who will be taking bisphosphonates and are also candidates for dental implants.

  11. Dental implant removal to facilitate suspension laryngoscopy and laser treatment of an obstructed airway.

    Science.gov (United States)

    Hume-Smith, H; Fowler, A; Vaz, F; Suaris, P

    2010-01-01

    A 29-year-old patient presented with dysphonia, dysphagia and a progressive history of stridor over 6 weeks. His past medical history included childhood nasolabial rhabdomyosarcoma treated by surgery, chemotherapy and radiotherapy. This had resulted in marked abnormalities of the facial skeleton, limited neck extension and restricted mouth opening of 1 cm, in part due to dental implants. After careful discussion and planning within a multidisciplinary team, the airway was optimised by temporary removal of the dental implants. This enabled a suspension laryngoscope to be passed, permitting carbon dioxide laser treatment to an obstruction at the laryngeal inlet and eliminating the need for a tracheostomy.

  12. Rehabilitation of orbital defect with silicone orbital prosthesis retained by dental implants

    Directory of Open Access Journals (Sweden)

    Satyabodh Shesharaj Guttal

    2016-01-01

    Full Text Available Orbital defects can result from cancer, birth anomalies, or trauma leading to an onslaught of problems in the function and psyche of the patient. These defects are restored by surgical reconstruction and followed by placement of orbital prosthesis for cosmetic makeup. The use of dental implants in retaining orbital prosthesis improves patient acceptance of the prosthesis owing to better retention and stability than conventional adhesive retained prosthesis. This case report describes a custom-made magnetic retentive assembly anchored by a dental implant which offers the orbital prosthesis the simplicity of self-alignment and ease of use.

  13. Rehabilitation of orbital defect with silicone orbital prosthesis retained by dental implants.

    Science.gov (United States)

    Guttal, Satyabodh Shesharaj; Desai, Jhanvi; Kudva, Adarsh; Patil, Basavaraj R

    2016-01-01

    Orbital defects can result from cancer, birth anomalies, or trauma leading to an onslaught of problems in the function and psyche of the patient. These defects are restored by surgical reconstruction and followed by placement of orbital prosthesis for cosmetic makeup. The use of dental implants in retaining orbital prosthesis improves patient acceptance of the prosthesis owing to better retention and stability than conventional adhesive retained prosthesis. This case report describes a custom-made magnetic retentive assembly anchored by a dental implant which offers the orbital prosthesis the simplicity of self-alignment and ease of use.

  14. Augmentation of residual alveolar bone height with tissue engineering for dental implant placement

    Directory of Open Access Journals (Sweden)

    S M Balaji

    2014-01-01

    Full Text Available The challenge of correcting deficient vertical alveolar height for dental implant placement has been there since dental implants came in to regular clinical placement. The ability of various methods to increase the residual alveolar height has met with varying results. The primary reason is that the techniques were not quite successful in maintaining the required residual alveolar height. Use of Bone Morphogentic Protein, especially rhBMP-2 has been met with high degree of success in deficient vertical alveolar height in a mandibular ridge. The demonstration of this using a case has been presented here.

  15. Marginal tissue response adjacent to Astra Dental Implants supporting overdentures in the mandible

    DEFF Research Database (Denmark)

    Gotfredsen, K; Holm, B; Sewerin, I

    1993-01-01

    The aim of this study was to evaluate the marginal tissue response adjacent to implant supported overdentures. Twenty edentulous patients had 2 Astra Dental Implants placed in the canine region of the lower jaw. New overdentures were retained by individual ball attachments in 11 patients...... that two osseointegrated Astra Dental Implants could successfully retain an overdenture in the lower jaw. However, long-term observation is needed for a definitive evaluation of this treatment concept....... showed any periodontal signs of failure. At the 2-year examination, no pocket depths adjacent to the implants exceeded 4 mm and no bone loss exceeded 3 mm. The mean annual bone loss was less than 0.2 mm during the first 2 years. The preliminary results from this limited study were promising and showed...

  16. Fracaso en los implantes dentales: Fibrointegración. Reporte de caso clínico

    Directory of Open Access Journals (Sweden)

    Iris Luz Santís Chamorro

    2014-06-01

    Full Text Available  ResumenLa rehabilitación con implantes dentales en los pacientes con edentulismo parcial o total posee amplias indicaciones que se ven limitadas por factores anatómicos y biológicos. La oseointegración surge como un hecho descubierto entre la adaptación biológica del hueso a la superficie del titanio del implante (interfase hueso-implante por lo que se afirma que el motivo de fracaso de la mayoría de los sistemas de implantes es que éstos se encapsulen en un tejido de cicatrización fibroso (fibrointegración mal diferenciado lo que crea movilidad, que lleva a reacciones en la mucosa y finalmente a la pérdida. El objetivo del presente artículo es promover la presentación de casos clínicos de pacientes con fracaso de implantes dentales, con el ánimo de esclarecer las posibles causas y los factores coadyuvantes de dicho fracaso, y así mejorar los resultados en implantología. (Duazary 2008; 115-120AbstractThe rehabilitation with dental implants in the patients with partial absence or total of teeth possesses extensive indications that are seen limited by biological and anatomical factors. The oseointegration arises like a discovered fact among the biological adaptation of the bone to the surface of the titanic of the implant (interface bone-implant for which it is affirmed that the motive of failure of the majority of the systems of implants is that these it self envelop in a scar formation of fibrous tissue (Fibrointegration badly differentiated what creates mobility, that carries to reactions in the mucous membrane and finally to the loss. The objective of the present article is to promote the presentation of patients' clinical cases with failure of dental implants, with the intention of clarifying the possible reasons and the helping factors of the above mentioned failure, and this way to improve the results in implantology.Key Words: Fibrointegration; oseointegration; dentals implants; interface; implants failure.

  17. Radiographic analysis of crestal bone levels around Laser-Lok collar dental implants.

    Science.gov (United States)

    Shapoff, Cary A; Lahey, Brent; Wasserlauf, Perry A; Kim, David M

    2010-04-01

    This retrospective radiographic study was organized to evaluate the clinical efficacy of implants with Laser-Lok microtexturing (8- and 12-microm grooves). A physical attachment of connective tissue fibers to the Laser-Lok microtexturing on the implant collar has been previously demonstrated using human histology, polarized light microscopy, and scanning electron microscopy. This analysis of 49 implants demonstrated a mean crestal bone loss of 0.44 mm at 2 years postrestoration and 0.46 mm at 3 years. All bone loss was contained within the height of the collar, and no bone loss was evident to the level of the implant threads. The radiographic evaluation of the clinical application of this implant supports previous findings that establishing a biologic seal of connective tissue fibers around a dental implant may be clinically relevant.

  18. Replacement of a molar with two narrow-diameter dental implants

    Directory of Open Access Journals (Sweden)

    Rajeshwari Penmetsa

    2016-01-01

    Full Text Available Dental implants have demonstrated a high degree of success in the restorations of teeth in partially or completely edentulous patients. However, when the buccolingual width of the edentulous crest is insufficient for the placement of standard sized implants, the use of two or more smaller diameter implants should be considered to avoid the need for invasive reconstruction techniques such as grafting procedures. The present case report describes the replacement of a single mandibular first molar with two narrow-diameter implants, in a 41-year- old male patient. No postoperative complications were reported in the 3-year follow-up period. The placement of two narrow-diameter implants replacing a missing mandibular molar could eliminate the mesiodistal bending, double the support capacity in the buccolingual direction, and minimize stress on the implants.

  19. Implant angulation: 2-year retrospective analysis on the influence of dental implant angle insertion on marginal bone resorption in maxillary and mandibular osseous onlay grafts.

    Science.gov (United States)

    Ramaglia, Luca; Toti, Paolo; Sbordone, Carolina; Guidetti, Franco; Martuscelli, Ranieri; Sbordone, Ludovico

    2015-05-01

    The purpose of this study was to determine the existence of correlations between marginal peri-implant linear bone loss and the angulation of implants in maxillary and mandibular augmented areas over the course of a 2-year survey. Dependent variables described the sample of the present retrospective chart review. By using three-dimensional radiographs, input variables, describing the implant angulation (buccal-lingual angle [φ] and mesial-distal angle [θ]) were measured; outcome variables described survival rate and marginal bone resorption (MBR) around dental implants in autogenous grafts (10 maxillae and 14 mandibles). Pairwise comparisons and linear correlation coefficient were computed. The peri-implant MBR in maxillary buccal and palatal areas appeared less intensive in the presence of an increased angulation of an implant towards the palatal side. Minor MBR was recorded around mandibular dental implants positioned at a right angle and slightly angulated towards the mesial. Resorption in buccal areas may be less intensive as the angulation of placed implants increases towards the palatal area in the maxilla, whereas for the mandible, a greater inclination towards the lingual area could be negative. In the mandibular group, when the implant was slightly angulated in the direction of the distal area, bone resorption seemed to be more marked in the buccal area. In the planning of dental implant placement in reconstructed alveolar bone with autograft, the extremely unfavourable resorption at the buccal aspect should be considered; this marginal bone loss seemed to be very sensitive to the angulation of the dental implant.

  20. Long-term results of jaw reconstruction with microsurgical fibula grafts and dental implants.

    Science.gov (United States)

    Gbara, Ali; Darwich, Khaldoun; Li, Lei; Schmelzle, Rainer; Blake, Felix

    2007-05-01

    The aim of this retrospective study was to evaluate the long-term utility of the free fibula flap for the reconstruction of the maxilla and mandible and to investigate its suitability for prosthetic rehabilitation with dental implants focusing on implant survival and implant-related morbidity. Thirty patients who underwent microsurgical reconstruction of the upper or lower jaw after resection from 1992 to 1994 and were available for follow-up examination were included in the investigation. The primary afflictions were malignant tumors, alveolar atrophy, or osteomyelitis. Clinical and radiologic findings were gathered and evaluated with emphasis on the radiologic follow-up as well as clinical investigations disclosing implant-related complications. The fibula proved very suitable for the reconstruction of the upper and lower jaw, allowing rehabilitation with dental implants in all cases. Additionally, the peri-implant bone resorption and the overall complication rate proved to be low. In 93 of 128 implants, probing depths ranged from 2 to 3 mm. In 20 implants, probing depths of 4 to 6 mm were observed. In 4 implants, probing depths of greater than 7 mm were observed. These values corresponded with the radiologically assessed values. The reconstruction of the upper and lower jaw with a microsurgically reanastomosed fibula flap, in combination with dental implants, leads to satisfactory functional and esthetic results. The fibula flap seems resistant to peri-implantary resorption processes and is capable of withstanding the masticatory forces that develop during functional loading. In conjunction with the new prosthetic attachments, like the titanium magnetic inserts, the fixation of cover dentures and the oral hygiene is simplified and improved.

  1. Factors Affecting the Survival Rate of Dental Implants: A Retrospective Study.

    Science.gov (United States)

    Raikar, Sonal; Talukdar, Pratim; Kumari, Sarala; Panda, Sangram Kumar; Oommen, Vinni Mary; Prasad, Arvind

    2017-01-01

    Dental implants have emerged as new treatment modality for the majority of patients and are expected to play a significant role in oral rehabilitation in the future. The present study was conducted to assess various factors affecting the survival rate of dental implants. The present retrospective study was conducted in the Department of Prosthodontics. In this study, 5200 patients with dental implants which were placed during June 2008-April 2015 were included. Exclusion criteria were patients with hormonal imbalance, patients with chronic infectious disease, patients receiving immunosuppressive therapy, pregnant women, drug and alcohol addicts, and patients with severe periodontal diseases. Parameters such as name, age, gender, length of implant, diameter of implant, location of implant, and bone quality were recorded. Data were tabulated and statistically evaluated with IBM SPSS Statistics for Windows, Version 20.0., IBM Corp., Armonk, NY, USA. Out of 5200 patients, 2800 were males and 2400 females. Maximum implants failures (55) were seen in age group above 60 years of age (males - 550, females -700). Age group 11.5 mm (40/700) followed by implants with 4.5 mm (16/1600) and implants with diameter 3.75-4.5 mm (50/2600). The Chi-square test showed significant results ( P < 0.05). Mandibular posterior showed 3.3% implants failure, maxillary posterior revealed 2.2%, maxillary anterior showed 2.1%, and mandibular anterior showed 1% failure rate; this difference was significant ( P < 0.05). Type I bone showed 0.3% implant failure, Type II showed 1.95%, Type III showed 3%, and Type IV revealed 0.8% failure rate; this difference was significant ( P < 0.05). Age, length of implant, diameter of implant, bone quality, and region of implant are factors determining the survival rate of implants. We found that implant above 11.5 mm length, and with diameter <3.75 mm, placed in the mandibular posterior region, in Type III bone showed maximum failures.

  2. Surface Modification of Dental Titanium Implant by Layer-by-Layer Electrostatic Self-Assembly

    Directory of Open Access Journals (Sweden)

    Quan Shi

    2017-08-01

    Full Text Available In vivo implants that are composed of titanium and titanium alloys as raw materials are widely used in the fields of biology and medicine. In the field of dental medicine, titanium is considered to be an ideal dental implant material. Good osseointegration and soft tissue closure are the foundation for the success of dental implants. Therefore, the enhancement of the osseointegration and antibacterial abilities of titanium and its alloys has been the focus of much research. With its many advantages, layer-by-layer (LbL assembly is a self-assembly technique that is used to develop multilayer films based on complementary interactions between differently charged polyelectrolytes. The LbL approach provides new methods and applications for the surface modification of dental titanium implant. In this review, the application of the LbL technique to surface modification of titanium including promoting osteogenesis and osseointegration, promoting the formation and healing of soft tissues, improving the antibacterial properties of titanium implant, achieving local drug delivery and sustained release is summarized.

  3. Capacity of dental equipment to interfere with cardiac implantable electrical devices.

    Science.gov (United States)

    Lahor-Soler, Eduard; Miranda-Rius, Jaume; Brunet-Llobet, Lluís; Sabaté de la Cruz, Xavier

    2015-06-01

    Patients with cardiac implantable electrical devices should take precautions when exposed to electromagnetic fields. Possible interference as a result of proximity to electromagnets or electricity flow from electronic tools employed in clinical odontology remains controversial. The objective of this study was to examine in vitro the capacity of dental equipment to provoke electromagnetic interference in pacemakers and implantable cardioverter defibrillators. Six electronic dental instruments were tested on three implantable cardioverter defibrillators and three pacemakers from different manufacturers. A simulator model, submerged in physiological saline, with elements that reproduced life-size anatomic structures was used. The instruments were analyzed at differing distances and for different time periods of application. The dental instruments studied displayed significant differences in their capacity to trigger electromagnetic interference. Significant differences in the quantity of registered interference were observed with respect to the variables manufacturer, type of cardiac implant, and application distance but not with the variable time of application. The electronic dental equipment tested at a clinical application distance (20 cm) provoked only slight interference in the pacemakers and implantable cardioverter defibrillators employed, irrespective of manufacturer. © 2015 Eur J Oral Sci.

  4. Implant retention and support for distal extension partial removable dental prostheses: satisfaction outcomes.

    Science.gov (United States)

    Gonçalves, Thais Marques Simek Vega; Campos, Camila Heitor; Garcia, Renata Cunha Matheus Rodrigues

    2014-08-01

    The rotational movements of the distal extension denture base of partial removable dental prostheses frequently harm the prosthesis stability, leading to discomfort during function. This study evaluated the use of distal implants to retain and support partial removable dental prostheses and assessed the outcomes with respect to specific aspects of patient satisfaction. Twelve participants (mean age, 62.6 ± 7.8 years) received new conventional mandibular partial removable dental prostheses and complete maxillary dentures. After 2 months of conventional prosthesis use, the participants completed a questionnaire assessing their satisfaction. Implants were then inserted bilaterally in the mandibular posterior region and, after 4 months, ball attachments were placed on the implants and on the partial removable dental prosthesis acrylic resin base. The implants and remaining teeth were followed up with clinical and image examinations. After 2 months, satisfaction was reevaluated, and the data were analyzed by the paired Student t test and the Bonferroni correction (α=.05). Clinical evaluation found stable periodontal conditions around the implants, no intrusions or mobility of teeth, and no radiographic changes in bone level. Participants reported significant improvements (Premovable prostheses improve retention and stability, minimize rotational movements, and significantly increase participant satisfaction. Copyright © 2014 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.

  5. Surface Damage on Dental Implants with Release of Loose Particles after Insertion into Bone.

    Science.gov (United States)

    Senna, Plinio; Antoninha Del Bel Cury, Altair; Kates, Stephen; Meirelles, Luiz

    2015-08-01

    Modern dental implants present surface features of distinct dimensions that can be damaged during the insertion procedure into bone. The aims of this study were (1) to quantify by means of roughness parameters the surface damage caused by the insertion procedure of dental implants and (2) to investigate the presence of loose particles at the interface. Three groups of dental implants representing different surface topographies were inserted in fresh cow rib bone blocks. The surface roughness was characterized by interferometry on the same area before and after the insertion. Scanning electron microscopy (SEM)-back-scattered electron detector (BSD) analysis was used to identify loose particles at the interface. The amplitude and hybrid roughness parameters of all three groups were lower after insertion. The surface presenting predominance of peaks (Ssk [skewness] > 0) associated to higher structures (height parameters) presented higher damage associated to more pronounced reduction of material volume. SEM-BSD images revealed loose titanium and aluminum particles at the interface mainly at the crestal cortical bone level. Shearing forces during the insertion procedure alters the surface of dental implants. Loose metal particles can be generated at bone-implant interface especially around surfaces composed mainly by peaks and with increased height parameters. © 2013 Wiley Periodicals, Inc.

  6. Interruption of Electrical Conductivity of Titanium Dental Implants Suggests a Path Towards Elimination Of Corrosion.

    Directory of Open Access Journals (Sweden)

    Alex E Pozhitkov

    Full Text Available Peri-implantitis is an inflammatory disease that results in the destruction of soft tissue and bone around the implant. Titanium implant corrosion has been attributed to the implant failure and cytotoxic effects to the alveolar bone. We have documented the extent of titanium release into surrounding plaque in patients with and without peri-implantitis. An in vitro model was designed to represent the actual environment of an implant in a patient's mouth. The model uses actual oral microbiota from a volunteer, allows monitoring electrochemical processes generated by biofilms growing on implants and permits control of biocorrosion electrical current. As determined by next generation DNA sequencing, microbial compositions in experiments with the in vitro model were comparable with the compositions found in patients with implants. It was determined that the electrical conductivity of titanium implants was the key factor responsible for the biocorrosion process. The interruption of the biocorrosion current resulted in a 4-5 fold reduction of corrosion. We propose a new design of dental implant that combines titanium in zero oxidation state for osseointegration and strength, interlaid with a nonconductive ceramic. In addition, we propose electrotherapy for manipulation of microbial biofilms and to induce bone healing in peri-implantitis patients.

  7. Influence of torsional strength on different types of dental implant platforms.

    Science.gov (United States)

    Teixeira, Ana Beatriz V; Shimano, Antônio Carlos; Macedo, Ana Paula; Valente, Mariana L C; dos Reis, Andréa C

    2015-06-01

    The study assessed deformation of implant components submitted to torsion tests of 80 and 120 N · cm using an optical stereomicroscope. The following 3 types of Titaniumfix conical implant connections (n = 5) measuring Ø 4.0 × 11.5 mm were used: external, internal hexagon and Morse taper connections. The diagonal and lateral measurements of the hexagon implant platform were measured before and after the torsion test. The torsion test using torque of 80 and 120 N · cm altered the implant dental platforms. All groups presented deformation of implant component after torque of 80 N · cm with no statistical difference among them. During torque of 120 N · cm, a difference in the Morse taper connection in relation to the internal and external hexagon connection was observed. The Morse taper connection implant, followed by the internal hex implant, underwent less deformation. Greater deformation occurred in the external hex implants. For all the implants, high insertion torques deformed the implant platform preventing long-term maintenance and stability of implants.

  8. Analysis of titanium and other metals in human jawbones with dental implants - A case series study.

    Science.gov (United States)

    He, Xiuli; Reichl, Franz-Xaver; Wang, Yan; Michalke, Bernhard; Milz, Stefan; Yang, Yang; Stolper, Philipp; Lindemaier, Gabriele; Graw, Matthias; Hickel, Reinhard; Högg, Christof

    2016-08-01

    The aim of this study was to measure titanium (Ti) content in human jawbones and to show that Ti was released from dental implants inserted into these jawbones. Seven samples from four human subjects with dental implants were analysed as test group and six bone samples of similar topographical regions from six human subjects without implants served as control. The contents of various elements in human jawbones were detected by inductively coupled plasma optical emission spectrometry. The distributions of various isotopes in human mandibular bone were measured with laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). Histological analyses of undecalcified, Giemsa-Eosin stained mandible sections were performed by light microscopy and particles were identified in human bone marrow by scanning electron microscope-energy dispersive X-ray analysis. In test group only Ti content was significantly higher compared to control group. The mean contents of Ti were 1940μg/kg in test group and 634μg/kg in control group. The highest Ti content detected in human mandibular bone was 37,700μg/kg-bone weight. In samples 4-7 (human subjects II-IV), increased Ti intensity was also detected by LA-ICP-MS in human mandibular tissues at a distance of 556-1587μm from implants, and the intensity increased with decreasing distance from implants. Particles with sizes of 0.5-40μm were found in human jawbone marrow tissues at distances of 60-700μm from implants in samples 4-7. Ti released from dental implants can be detected in human mandibular bone and bone marrow tissues, and the distribution of Ti in human bone was related to the distance to the implant. Copyright © 2016 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

  9. Although Limited Evidence Suggests Patient Perceptions and Expectations for Dental Implants Are Realistic, Many Misconceptions Remain.

    Science.gov (United States)

    Farsai, Paul S

    2017-09-01

    What do patients expect from treatment with Dental Implants? Perceptions, expectations and misconceptions: A multicenter study. Yao J, Li M, Tang H, Want P-L, Zhao Y-X, McGrath C, Mattheos N. Clin Oral Implants Res 28(3):261-71. Information not available TYPE OF STUDY/DESIGN: Cross-sectional study (survey). Copyright © 2017 Elsevier Inc. All rights reserved.

  10. Systematic analysis on the efficacy of bone enhancement methods used for success in dental implants.

    Science.gov (United States)

    Elakkiya, S; Ramesh, A S; Prabhu, K

    2017-01-01

    Bone grafting is beneficial in enhancing bones that are lost due to trauma or natural or pathologic process. Autogenous bone, allogenic bone, xenogeneic bone, bone substitutes, and alloplasts can also be used for this purpose. Bone quantity should be adequate for the placement of implants, which necessitate the use of bone grafts before implant placement. This review analyses the different bone graft materials that are used for grafting around implants and evaluate if these grafts yield successful implant osseointegration over a period of time. The MEDLINE-PubMed database was searched from September 2016 to 10 years previously. Several journals were hand searched and from cross-references. The primary outcome measure that was analyzed was the survival rate of dental implants in the grafted sites at 6 months-1 year, and the secondary outcomes were success rates of dental implants over a period of 3-5 years' follow-up. The search yielded 213 articles. Ultimately, 31 studies meeting the eligibility criteria were selected. The analysis shows that autologous bone grafts can be preferred over allografts and xenografts for grafting implant sites, which showed less complication and high success rate. Based on the available data in the current existing studies with a follow-up period of at least 3-5 years, it can be summarized that the autologous bone grafts can be preferred over allografts and xenografts for grafting implant sites since they are stable for at least 3-5 years.

  11. Patient satisfaction 8-14 years after dental implant therapy - a questionnaire study.

    Science.gov (United States)

    Adler, Lottie; Liedholm, Eva; Silvegren, Malin; Modin, Carolina; Buhlin, Kåre; Jansson, Leif

    2016-07-01

    The aim of this questionnaire study was to investigate patient satisfaction 8-14 years after dental implant therapy and complications influencing the degree of satisfaction. A questionnaire was sent by post to 587 patients at a specialist clinic of periodontology. The questionnaire consisted of 19 statements or questions such as the degree of satisfaction with the implants and knowledge of complications. In nine of the questions, respondents were asked to grade the extent of their agreement with a statement by selecting from fixed answers. Three of the questions were designed to be answered using a visual analog scale. In total, 400 individuals (81%) responded to the questionnaire. The mean time elapsed since implant installation was 10 years. A great majority (81%) experienced a high chewing comfort and was satisfied or sufficiently satisfied (94%) with the aesthetic aspects of their implant restorations, while 32% of the individuals had experienced problems with their implant reconstructions. The disadvantage that patients remarked on was the cost of the treatment. Those who had experienced problems with their implant reconstructions were also less satisfied with the treatment. A great majority of the patients expressed a high degree of satisfaction with their dental implants 8-14 years after the treatment. Patients were less satisfied if they had experience of problems with their implant reconstructions and in cases when the clinicians were unable to resolve their complications.

  12. Biomimetic treatment on dental implants for short -term bone regeneration

    OpenAIRE

    Gil Mur, Francisco Javier; Manzanares, Norberto; Badet de Mena, Armando; Aparicio Bádenas, Conrado José; Ginebra Molins, Maria Pau

    2013-01-01

    Objectives The main purpose of this work was to assess the short-term bone regenerative potential of new osteoconductive implants. The novelty of the study lies in the analysis of the effectiveness of a novel two-step treatment which combines shot-blasting with a thermo-chemical treatment, at very short times after implant placement in a minipig model. Materials and methods Three hundred twenty implants with four different surface treatments, namely bioactivated sur...

  13. Multiple teeth replacement with endosseous one-piece yttrium-stabilized zirconia dental implants

    Science.gov (United States)

    Borgonovo, Andrea E.; Fabbri, Alberto; Censi, Rachele; Maiorana, Carlo

    2012-01-01

    Objectives: The purpose of this study is to clinically and radiographically evaluate survival and success rate of multiple zirconia dental implants positioned in each patient during a follow-up period of at least 12 months up to 48 months. Study Design: Eight patients were treated for multiple edentulism with 29 zirconia dental implants. All implants received immediate temporary restorations and 6 months after surgery were definitively restored. 6 months to 4 years after implant insertion, a clinical-radiographic evaluation was performed in order to estimate peri-implant tissues health and peri-implant marginal bone loss. Results: Survival rate within follow-up period was therefore 100%. The average marginal bone loss (MBL) from baseline to 6 months was +1.375±0.388 mm; from 6 months to 1 year was +0.22±0.598 mm; from 1 year to 2 years was -0.368±0.387 mm; from 2 years to 3 years was -0.0669±0.425 mm; from 3 years to 4 years +0.048±0.262 mm. The mean marginal bone loss at 4 years from the implants insertion was +1.208 mm. Conclusions: According to several studies, when using a radiographic criterion for implant success, marginal bone loss below 0.9-1.6 mm during the first year in function can be considered acceptable. In our work, radiographic measurements of MBL showed values not exceeding 1.6 mm during the first year of loading and also 1 year up to 4 years after surgery further marginal bone loss was minimal and not significant. This peri-implant bone preservation may be associated to the absence of micro-gap between fixture and abutment since zirconia dental implants are one-piece implant. Moreover, zirconia is characterized by high biocompatibility and it accumulates significantly fewer bacteria than titanium. Key words:Zirconia dental implants, multiple implants, radiographic evaluation, marginal bone loss (MBL). PMID:22926479

  14. Dental implants placed into alveolar clefts reconstructed with tongue flaps and bone grafts.

    Science.gov (United States)

    Sándor, George K B; Carmichael, Robert P; Brkovic, Bozidar M B

    2010-02-01

    The aim of this study was to describe a case series using surgical and prosthodontic modifications of tongue flaps necessary to adapt them for use in the reconstruction of large cleft deformities refractory to customary measures using dental implants and to study their outcomes in patients with complex cleft lip and palate deformities. Five patients were treated with iliac crest bone grafts and covered by anteriorly based tongue flaps divided at either 3 or 4 weeks after surgery. The patients were followed clinically and radiographically for 3-12 years after placement of their dental implants to monitor implant survival and success. One of the 5 patients suffered a partial tongue flap detachment, graft dehiscence, and recurrence of an oronasal fistula, which was successfully treated by shifting the tongue flap tissue from its new location in the palate. A total of 18 dental implants were placed into bone-grafted tissue covered by the tongue flaps. There was 1 implant failure. There were no cases of periimplantitis or bone loss in the 17 surviving implants. Tongue flaps are rarely used clinical entities with a very narrow range of indications. Tongue flaps are useful in the preprosthetic reconstruction of select cases with large residual oronasal fistulae with soft tissue deficits due to scarring from previously failed surgery. Tongue flaps are extremely stressful procedures for patients to endure. Patient selection is of the utmost importance. Copyright (c) 2010 Mosby, Inc. All rights reserved.

  15. Biomechanical evaluation of dental implants in D1 and D4 bone by Finite Element Analysis.

    Science.gov (United States)

    Danza, M; Quaranta, A; Carinci, F; Paracchini, L; Pompa, G; Vozza, I

    2010-06-01

    The aim of the present study was to analyze stress and strain distribution in dental implants with different abutment's inclination inserted in D1 and D4 bone. The biomechanical behavior of 5 mm x 16 mm dental implants with straight, 15 degrees and 25 degrees angulated abutments subjected to static loads, in contact with D1 and D4 bone, was evaluated by Finite Element Analysis (FEA). The lowest stress and strain values were found in the system composed by implants with straight abutments loaded with a 200-N vertical strength, while the highest stress and strain values were found in implants with 15 degrees angulated abutment loaded with a tilted strength (FY=200 N and FZ=140 N). Stress value increased from D1 to D4 bone, while strain value decreased due to the effect of normal elasticity mode of biological tissues. The different stress and strain distribution in D1 and D4 bone tissue surrounding dental implants with a tapered neck could favor prosthetic load and play a role in implant long-term success.

  16. Nanomodified Peek Dental Implants: Bioactive Composites and Surface Modification—A Review

    Directory of Open Access Journals (Sweden)

    Shariq Najeeb

    2015-01-01

    Full Text Available Purpose. The aim of this review is to summarize and evaluate the relevant literature regarding the different ways how polyetheretherketone (PEEK can be modified to overcome its limited bioactivity, and thereby making it suitable as a dental implant material. Study Selection. An electronic literature search was conducted via the PubMed and Google Scholar databases using the keywords “PEEK dental implants,” “nano,” “osseointegration,” “surface treatment,” and “modification.” A total of 16 in vivo and in vitro studies were found suitable to be included in this review. Results. There are many viable methods to increase the bioactivity of PEEK. Most methods focus on increasing the surface roughness, increasing the hydrophilicity and coating osseoconductive materials. Conclusion. There are many ways in which PEEK can be modified at a nanometer level to overcome its limited bioactivity. Melt-blending with bioactive nanoparticles can be used to produce bioactive nanocomposites, while spin-coating, gas plasma etching, electron beam, and plasma-ion immersion implantation can be used to modify the surface of PEEK implants in order to make them more bioactive. However, more animal studies are needed before these implants can be deemed suitable to be used as dental implants.

  17. Factors explaining desire for dental implant therapy: analysis of the results from a longitudinal study.

    Science.gov (United States)

    Narby, Birger; Bagewitz, Ingrid Collin; Soderfeldt, Bjorn

    2011-01-01

    The aim of this research was to investigate possible factors behind the desire for and changes in attitude toward implant treatment in a population of middle-aged and older individuals in Sweden. In 1989 and 1999, questionnaires were sent to 3,000 residents in Orebro County, Sweden. Response rates were 79% and 68%, respectively. Those responding to both questionnaires yielded a longitudinal study panel. Logistic regression models were done with "desire of implant treatment" and "changes in desire of implant treatment" as dependent variables. Older people, non-city residents, and those with one or several missing and unreplaced teeth changed their desire for implant treatment between study years. Effects of age, residence, and better dental status disappeared during the 10-year study period. Those who were edentulous and those with removable dentures (pseudo R2: 0.17) expressed lower desire for treatment than those