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Sample records for anterior teeth utilizing

  1. Restoring primary anterior teeth.

    Science.gov (United States)

    Waggoner, William F

    2002-01-01

    A variety of esthetic restorative materials are available for restoring primary incisors. Knowledge of the specific strengths, weakness, and properties of each material will enhance the clinician's ability to make the best choice of selection for each individual situation. Intracoronal restorations of primary teeth may utilize resin composites, glass ionomer cements, resin-modified ionomers, or polyacid-modified resins. Each has distinct advantages and disadvantages and the clinical conditions of placement may be a strong determining factor as to which material is utilized. Full coronal restoration of primary incisors may be indicated for a number of reasons. Crowns available for restoration of primary incisors include those that are directly bonded onto the tooth, which generally are a resin material, and those crowns that are luted onto the tooth and are some type of stainless steel crown. However, due to lack of supporting clinical data, none of the crowns can be said to be superior to the others under all circumstances. Though caries in the mandibular region is rare, restorative solutions for mandibular incisors are needed. Neither stainless steel crowns nor celluloid crown forms are made specifically for mandibular incisors. Many options exist to repair carious primary incisors, but there is insufficient controlled, clinical data to suggest that one type of restoration is superior to another. This does not discount the fact that dentists have been using many of these crowns for years with much success. Operator preferences, esthetic demands by parents, the child's behavior, and moisture and hemorrhage control are all variables which affect the decision and ultimate outcome of whatever restorative treatment is chosen. PMID:12412967

  2. Positioning of anterior teeth in removable dentures

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    Strajnić Ljiljana

    2002-01-01

    Full Text Available Introduction The aim of this paper was to present methods of placement of artificial anterior teeth in edentulous individuals. The following review takes account of the majority of papers published during the last 100 years. The review has been divided into sections regarding the method used to determine the position of artificial anterior teeth. Geometric aspect Gysi (1895-1920 produced the first scientific theory about the position of artificial anterior teeth. Physiognomic theory The aim of this theory is to find the most natural position for artificial anterior teeth for each individual. Camper's "face angle" as a physiognomic criterion, has been introduced in papers of Wehrli (1961, Marxhors (1966, Tanzer (1968, Lombardi (1973. Esthetic aspect Important names in the field of dental esthetics are: Schön and Singer (1961, Arnheim (1965, Krajiček (1969, Tanzer (1968, Lombardi (1973, Goldstein (1976. They have introduced principles of visual aspects for selection of contours, dimension and position of artificial anterior teeth. Constitution aspect Flagg (1880, Williams (1913 and Hrauf (1957, 1958, have considered body constitution and individual characteristics regarding position of artificial anterior teeth. Physiological theory In 1971, Marxhors pointed to the fact that the position of artificial teeth corresponds with the function of the surrounding soft tissue and from the aspect of physiognomy as well. Phonetic aspect According to Silverman (1962 artificial anterior teeth are nearest when we pronounce the sound "S". Cephalometrical research Rayson (1970, Watson (1989, Strajnić Lj. (1999, Bassi F. (2001 have presented cephalometric radiographic analyses of natural anterior teeth compared with cephalometric radiographic analyses of artificial anterior teeth. A review of dental literature shows several factors suggesting modalities which should determine the position of artificial anterior teeth. Numerous methods have been designed for

  3. Rehablitation of mandibular fracture with anterior teeth loss

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    Singh, Meenakshi; Singh, Ajay; Rajpal, Jaisika; K. K. Gupta; Singh, Vibha

    2011-01-01

    We report here on rehabilitating a case with mandibular fracture and lower anterior teeth loss. Three double-staged implants were placed in the lower anterior region; in an attempt to rehabilitate the condition of five missing lower teeth, two natural teeth were prepared to act as natural abutments. Teeth implant-supported prosthesis was fabricated. Patient with a right mandibular fracture and loss of lower anterior missing teeth was successfully rehabilitated with teeth implant-supported pro...

  4. Concrescent triplets involving primary anterior teeth

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    Urvashi Sharma

    2013-01-01

    Full Text Available Odontogenesis is a complex process wherein more than 200 genes are known to play a significant role in tooth development. An imbalance can lead to an abnormality in the number, size, shape or structure of the developing tooth/teeth. The presence of an extra dental lamina forms a supernumerary tooth. The supernumerary teeth are of two types: A rudimentary tooth where the supernumerary tooth does not resemble any tooth in the normal series or a supplemental tooth in which this anomalous tooth resembles one in the normal series. It is also very rare to encounter triple teeth in primary dentition. The union of these teeth may be through fusion, gemination, concrescence or a combination of fusion and gemination. Presented is a rare case of concrescence involving maxillary deciduous incisors and a supplemental tooth in a 7-year-old boy. The differential diagnosis, etiology, and complications of primary anterior triple teeth are discussed.

  5. Anterior Teeth Mutilation and The Occurrence of Posterior Teeth Atrition in Siberut Island

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    Isnindiah Koerniati

    2013-01-01

    The Mentawai ethnic group is accustomed to the practice of anterior teeth mutilation on males and females prior to reaching puberty age at Siberut Island, Mentawai Islands Regency, West Sumatra Province. Objective: of this research was to analyze the effects of anterior teeth mutilation on the teeth of the Mentawai ethnic, and prove that there is a correlation between anterior teeth mutilation and posterior teeth attritions. Material & method: There were 179 respondents who contributed to...

  6. Intrusion of anterior teeth to improve smile esthetics

    OpenAIRE

    Chandrasekharan, Deepak; Balaji, S. M.

    2010-01-01

    A gummy smile is probably one of the most common causes of an unaesthetic smile. Causes include overeruption of maxillary anterior teeth and maxillary vertical excess. Intrusion of maxillary anterior teeth with Orthodontics and Le forte I superior repositioning may form a part of the solution. Of late the use of micro implants have improved the smile esthetics of borderline surgical cases by allowing the Orthodontist to intrude teeth more than what was possible with conventional Orthodontics.

  7. Concrescent triplets involving primary anterior teeth

    OpenAIRE

    Urvashi Sharma; Anubha Gulati; Namrata C Gill

    2013-01-01

    Odontogenesis is a complex process wherein more than 200 genes are known to play a significant role in tooth development. An imbalance can lead to an abnormality in the number, size, shape or structure of the developing tooth/teeth. The presence of an extra dental lamina forms a supernumerary tooth. The supernumerary teeth are of two types: A rudimentary tooth where the supernumerary tooth does not resemble any tooth in the normal series or a supplemental tooth in which this anomalous tooth r...

  8. The significance of biometric parameters in determining anterior teeth width

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    Strajnić Ljiljana

    2013-01-01

    Full Text Available Background/Aim. An important element of prosthetic treatment of edentulous patients is selecting the size of anterior artificial teeth that will restore the natural harmony of one’s dentolabial structure as well as the whole face. The main objective of this study was to determine the correlation between the inner canthal distance (ICD and interalar width (IAW on one side and the width of both central incisors (CIW, the width of central and lateral incisors (CLIW, the width of anterior teeth (ATW, the width between the canine cusps (CCW, which may be useful in clinical practice. Methods. A total of 89 subjects comprising 23 male and 66 female were studied. Their age ranged from 19 to 34 years with the mean of 25 years. Only the subjects with the preserved natural dentition were included in the sample. All facial and intraoral tooth measurements were made with a Boley Gauge (Buffalo Dental Manufacturing Co., Brooklyn NY, USA having a resolution of 0.1mm. Results. A moderate correlation was established between the interalar width and combined width of anterior teeth and canine cusp width (r = 0.439, r = 0.374. A low correlation was established between the inner canthal distance and the width of anterior teeth and canine cusp width (r = 0.335, r = 0.303. The differences between the two genders were highly significant for all the parameters (p < 0.01. The measured facial distances and width of anterior teeth were higher in men than in women. Conclusion. The results of this study suggest that the examined interalar width and inner canthal distance cannot be considered reliable guidelines in the selection of artificial upper anterior teeth. However, they may be used as a useful additional factor combined with other methods for objective tooth selection. The final decision should be made while working on dentures fitting models with the patient’s consent.

  9. Is biologic width of anterior and posterior teeth similar?

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    Amir Alireza Rasouli Ghahroudi

    2014-09-01

    Full Text Available The biologic width (BW includes attached epithelial cells and connective tissue attachment complex being very important in the periodontal health during prosthetic treatments as invading this zone can cause bone resorption and gingival recession. The present study investigated biologic width values in the normal periodontium in anterior and posterior teeth. 30 patients that referred from restorative department to periodontics department of Tehran University of medical sciences who need crown lengthening procedure on their teeth with no history of orthodontic, prosthodontic and periodontal treatment were randomly enrolled in this cross-sectional trial. Sulcus depths (SD as well as the distance between free gingival margin and the bone crest (FB of anterior and posterior teeth were measured by UNC-15 probe and compared. periodontium thickness was also assessed. The data were subjected to Student t test. Mean BW in the 43 anterior and 47 posterior teeth was measured and not significantly different (1.4651±0.39 mm vs. 1.6312±0.49 mm was observed; however, BW was significantly more in the teeth with thick periodontium compared to those with thin periodontium (1.703±0.5 vs. 1.408±0.35; P=0.002. BW not only is different in individuals but also could be dissimilar in different teeth and should be calculated independently prior to restorative treatments.

  10. Is biologic width of anterior and posterior teeth similar?

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    Rasouli Ghahroudi, Amir Alireza; Khorsand, Afshin; Yaghobee, Siamak; Haghighati, Farideh

    2014-01-01

    The biologic width (BW) includes attached epithelial cells and connective tissue attachment complex being very important in the periodontal health during prosthetic treatments as invading this zone can cause bone resorption and gingival recession. The present study investigated biologic width values in the normal periodontium in anterior and posterior teeth. 30 patients that referred from restorative department to periodontics department of Tehran University of medical sciences who need crown lengthening procedure on their teeth with no history of orthodontic, prosthodontic and periodontal treatment were randomly enrolled in this cross-sectional trial. Sulcus depths (SD) as well as the distance between free gingival margin and the bone crest (FB) of anterior and posterior teeth were measured by UNC-15 probe and compared. periodontium thickness was also assessed. The data were subjected to Student t test. Mean BW in the 43 anterior and 47 posterior teeth was measured and not significantly different (1.4651±0.39 mm vs. 1.6312±0.49 mm) was observed; however, BW was significantly more in the teeth with thick periodontium compared to those with thin periodontium (1.703±0.5 vs. 1.408±0.35; P=0.002). BW not only is different in individuals but also could be dissimilar in different teeth and should be calculated independently prior to restorative treatments. PMID:25325207

  11. Perikymata spacing and distribution on hominid anterior teeth.

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    Dean, M C; Reid, D J

    2001-11-01

    We documented the spacing and distribution of perikymata on the buccal enamel surface of fossil hominin anterior teeth with reference to a sample of modern human and modern great ape teeth. A sample of 27 anterior teeth attributed to Australopithecus (5 to A. afarensis, 22 to A. africanus) and of 33 attributed to Paranthropus (6 to P. boisei, and 27 to P. robustus) were replicated and sputter-coated with gold to enable reflected light microscopy of their surface topography. Anterior teeth were then divided into 10 equal divisions of buccal crown height. The total perikymata count in each division of crown height was recorded using a binocular microscope fitted with a vernier micrometer eyepiece. Then the mean number of perikymata per millimeter was calculated for each division. Similar comparative data for a modern sample of 115 unworn human anterior teeth and 30 African great ape anterior teeth were collected from ground sections. Perikymata counts in each taxon (together with either known or presumed periodicities of perikymata) were then used to estimate enamel formation times in each division of crown height, for all anterior tooth types combined. The distributions of these estimates of time taken to form each division of crown height follow the same trends as the actual perikymata counts and differ between taxa in the same basic way. The distinction between modern African great apes and fossil hominins is particularly clear. Finally, we calculated crown formation times for each anterior tooth type by summing cuspal and lateral enamel formation times. Estimates of average crown formation times in australopiths are shorter than those calculated for both modern human and African great ape anterior teeth. The data presented here provide a better basis for exploring differences in perikymata spacing and distribution among fossil hominins, and provide the first opportunity to describe four specimens attributed to Homo in this context. Preliminary data indicate that

  12. A review on anterior teeth restorations

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    Gaurav Solanki

    2014-12-01

    Full Text Available Restorations of teeth have been a need of time since very long. As the time have passed, there have been different advances in the field of restorative materials and tooth restorations. Many newer restorative materials are now available to us for the purpose of tooth restorations still some of the older materials are materials of choice for a sector of society. This article focuses on few such restorative materials and also tells us about a few patents granted in such field.

  13. Brief communication: The distribution of perikymata on Qafzeh anterior teeth.

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    Guatelli-Steinberg, Debbie; Reid, Donald J

    2010-01-01

    Recent studies have suggested that Neandertals and modern humans differ in the distribution of perikymata (enamel growth increments) over their permanent anterior tooth crowns. In modern humans, perikymata become increasingly more compact toward the cervix than they do in Neandertals. Previous studies have suggested that a more homogeneous distribution of perikymata, like that of Neandertals, characterizes the anterior teeth of Homo heidelbergensis and Homo erectus as well. Here, we investigated whether Qafzeh anterior teeth (N = 14) differ from those of modern southern Africans, northern Europeans, and Alaskans (N = 47-74 depending on tooth type) in the percentage of perikymata present in their cervical halves. Using the normally distributed modern human values for each tooth type, we calculated Z-scores for the 14 Qafzeh teeth. All but two of the 14 Qafzeh teeth had negative Z-scores, meaning that values equal to these would be found in the bottom 50% of the modern human samples. Seven of the 14 would be found in the lowest 5% of the modern human distribution. Qafzeh teeth therefore appear to differ from those of modern humans in the same direction that Neandertals do: with generally lower percentages of perikymata in their cervical regions. The similarity between them appears to represent the retention of a perikymata distribution pattern present in earlier members of the genus Homo, but not generally characteristic of modern humans from diverse regions of the world. PMID:19902531

  14. Subluxation injuries of maxillary primary anterior teeth: epidemiology and prognosis of 207 traumatized teeth.

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    Fried, I; Erickson, P; Schwartz, S; Keenan, K

    1996-01-01

    This study investigated the epidemiology, sequelae, and prognosis of subluxation injuries to the maxillary primary anterior dentition. Data were collected from dental records at the Montreal Children's Hospital, Montreal, Canada, of patients sustaining trauma between 1982 and 1993. The study group consisted of 207 teeth in 134 patients, 81 males and 53 females. The age of the patients ranged from 0.8 years to 7.5 years, with a mean of 3.5 years. The highest incidence of trauma was in males between the ages of 3 and 4 years, and in females between 1 and 3 years. The highest incidence of trauma (66.2%) involved the primary central incisors. The most common cause of trauma (52%) was simple falls indoors. Occlusal or periapical radiographs were the radiographic view of choice unless an anterior nasal spine fracture was suspected, in which case a lateral projection was exposed. Approximately 64% of the study teeth had a mobility ranging from 0.6 to 1.5 mm. Treatment varied from no treatment (80% of teeth) to extraction. Post-traumatic evaluations were distributed into six common time intervals used by dentists for follow up. The results indicated that patient discomfort and occlusal interference were not common. Discoloration and pulpal calcification increased with time. Mobility decreased with time, with the majority of teeth returning to a normal physiologic range. External resorption may have been present, but was rare. Treatment or antibiotics were rarely needed at follow-up visits. Overall, these teeth responded positively, and there was a low morbidity associated with subluxation injuries. PMID:8710718

  15. Replacement of Missing Anterior Teeth in a Patient with Temporomandibular Disorder

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    Satheesh B. Haralur

    2014-01-01

    Full Text Available The loss of anterior teeth leads to extreme psychological trauma, along with functional and esthetic debilitations. Healthy anterior teeth play an important role of protecting the posterior teeth during excursive mandibular movement. Loss of anterior teeth induces posterior interference with extended disocclusion time. Posterior disocclusion is critical to remove the harmful force on the teeth temporomandibular joint and eliminate muscle hypertonicity. Occlusal interference is considered as contributing factor to temporomandibular disorder (TMD symptoms. Prosthesis design should eliminate deleterious tooth contacts. Establishing optimum anterior guidance is a key to establishing harmonious functional occlusion in addition to the correction of the esthetic and phonetic disabilities. This case report explains the steps involved in the rehabilitation of the TMD patient with loss of maxillary anterior teeth.

  16. Evaluation of Survival Time of Tooth Color Dental Materials in Primary Anterior Teeth

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    Behjat-Al-Molook Ajami

    2013-01-01

    Full Text Available Introduction: In restorative dentistry, selecting the proper material is an important factor for clinical success. The objective of this study was clinical evaluation of survival time of three tooth color materials in primary anterior teeth. Methods: In this interventional clinical trial study, 94 deciduous anterior teeth (36 teeth in boys, 58 teeth in girls belonging to 3-5 year old children in Pediatric Department of Mashhad Faculty of Dentistry, Iran were selected. Selective dental materials included compoglass, glass-ionomer Fuji II LC, and composite resin. The data were analyzed with Kaplan–Meyer and Log rank test. Results: compoglass had the highest survival time in comparison with composite and glass-ionomer. Nine months retention rate for teeth restored with compoglass, composite resin and glass-ionomer were estimated: 95%, 21%, and 12.5%, respectively. Conclusion: Compoglass can be a suitable material for anterior primary teeth restoration

  17. The aesthetic treatment for anterior teeth with lost crown by endorestoration

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    Nanik Zubaidah

    2009-06-01

    Full Text Available Background: The aesthetic has an important role in social life, especially the anterior teeth. The aesthetic abnormality of anterior teeth i.e. discoloration, malpotition or the anterior teeth with crown damage for more than one third or all part of crown is lost due to caries or other causes, will influence its appearance especially during smile. Purpose: The aim of this case report, therefore, is to show how teeth with clinical crown lost or only the root left still can be treated by endorestoration treatment in order to reconstruct the shape and function of the teeth similar to the original ones. Case: Female 52 years old with the lost crown of anterior teeth. The patient did not want her teeth to be extracted. Case Management: The abnormality of these teeth are still able to be reconstructed by endorestoration i.e. endodontic treatment with post and core insertion in the root canal will increase its retention and recovery by the porcelain crown fused to metal to recover the original formation and aesthetic and thus has the normal refunction. The treatment, it improve the confidence of the patient, and also can function normally. The patient did not feel pain. Ronsenography showed the periapical lesion diminished, the neighbor gingival was going better in both function and color. Conclusion: Endorestoration treatment on the anterior teeth with lost crown could recover the normal function, dental aesthetic and self confidence.

  18. Psychosocial Effects of Fractured Anterior Teeth among Rural Children

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    Naveen, Mohan; Teja, Ravi; Paulindraraj, Shankar; Vallabhaneni, Sai K; Arumugam, Selva B

    2016-01-01

    ABSTRACT Aim: The aim of the study is to determine how rural children view children with visible incisor fracture. Materials and methods: Class 7 (aged 11-12 years) and class 10 (aged 14-15 years) schoolchildren (the participants) were invited to make a social judgment about the color photograph of two children (the subjects). Participants were randomly allocated either (i) pictures of children without incisor fracture or (ii) pictures of the same children whose photographs had been digitally modified to visible incisor fracture. Using a child-centered questionnaire, participants rated subjects using a four-point Likert scale for three negative and six positive attributes. Total attribute scores were tested for significant differences, according to whether the subject had visible incisor fracture or not, using multivariate analysis of variance (p < 0.05). Results: Both class 7 and 10 children rated subjects with visible incisor fracture more negatively than the subjects without incisor fracture. Female participants of class 10 have rated the male subject with incisor fracture significantly negatively (p < 0.01) than male subject without incisor fracture. How to cite this article: Venkatesan R, Naveen M, Teja R, Paulindraraj S, Vallabhaneni SK, Arumugam SB. Psychosocial Effects of Fractured Anterior Teeth among Rural Children. Int J Clin Pediatr Dent 2016;9(2):128-130. PMID:27365933

  19. Esthetic, occlusal, and periodontal rehabilitation of anterior teeth with minimum thickness porcelain laminate veneers.

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    da Cunha, Leonardo Fernandes; Pedroche, Lorena Oliveira; Gonzaga, Carla Castiglia; Furuse, Adilson Yoshio

    2014-12-01

    Ceramic veneers of minimum thickness provide satisfactory esthetic outcomes while preserving the dental structure. Dental ceramics can both improve the esthetic appearance and reestablish the strength and function of teeth. In worn anterior teeth, functional surfaces, for example, anterior and lateral guidance, can be restored effectively. The characteristics of dental ceramics, such as color stability and mechanical and optical properties, make this material a good choice for indirect restorations, especially when optimum function and esthetics are required. This clinical report presents an occlusal, periodontal, and restorative solution with minimum thickness glass ceramic veneers for worn anterior teeth with multiple diastemas. PMID:25156092

  20. Evaluation of maxillary anterior teeth and their relation to the golden proportion in malaysian population

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    Al-Marzok Maan Ibrahim

    2013-01-01

    Full Text Available Abstract Background The maxillary anterior teeth are important in achieving pleasing dental aesthetics. Various methods are used to measure the size and form of them, including the golden proportion between their perceived widths, and the width-to-height ratio, referred to as the golden standard. The purpose of this study was conducted to evaluate whether consistent relationships exist between tooth width and height of the clinical crown dimensions; and to investigate the occurrence of the golden proportion of the maxillary anterior teeth. Methods Dental casts of the maxillary arches were made in this cross-sectional study from MAHSA University College students who met the inclusion criteria. The 49 participants represented the Malaysian population main ethnics. The dimensions of the anterior teeth and the perceived width of anterior teeth viewed from front were measured using a digital caliper. Results Comparison of the perceived width ratio of lateral to central incisor and canine to lateral incisor with the golden proportion of 0.618 revealed there were a significant statistical difference (p  Conclusions The golden proportion was not found to exist between the perceived widths of maxillary anterior teeth. No golden standard were detected for the width-to-height proportions of maxillary incisors. Specific population characteristics and perception of beauty must be considered. However, ethnicity has no association with the proportions of maxillary anterior teeth.

  1. Application of cone-beam CT in root morphology observation of human maxillary anterior teeth

    International Nuclear Information System (INIS)

    Objective: To detect the root curvature and diameter in human maxillary anterior teeth by cone-beam computed tomography (CBCT) and to provide some anatomical parameters related to post-core design. Methods: A total of 129 human maxillary anterior teeth were selected and analyzed. The three-dimensional images of these teeth were obtained by multiplanar reconstructions (MPR) technique of CBCT, and the root curvature and diameter were observed and measured by dedicated software. Results: The mean labio-lingual root curvature degree of maxillary central incisors was significantly smaller than those of maxillary lateral incisors and canines (χ2=6.592, P=0.037), while the labio-lingual root curvature radius was significantly larger than those of other groups (χ2=8.504, P=0.014). There were significant differences in the root length distribution of the mesio-distal curved part between the three different maxillary anterior teeth groups (χ2=13.910, P=0.008). The mean diameter measured labio-lingually was significantly different from that measured mesiodistally in various groups (P=0.000). Conclusion: There are differences in root morphology of 129 human maxillary anterior teeth, and the root curvatures and diameters of human maxillary anterior teeth present differently in CBCT. (authors)

  2. Accessory roots and root canals in human anterior teeth: a review and clinical considerations.

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    Ahmed, H M A; Hashem, A A

    2016-08-01

    Anterior teeth may have aberrant anatomical variations in the number of roots and root canals. A review of the literature was conducted using appropriate key words in major endodontic journals to identify the available reported cases as well as experimental and clinical investigations on accessory roots and root canals in anterior teeth. After retrieving the full text of related articles, cross-citations were identified, and the pooled data were then discussed. Results revealed a higher prevalence in accessory root/root canal variations in mandibular anterior teeth than in maxillary counterparts. However, maxillary incisor teeth revealed the highest tendency for accessory root/root canal aberrations caused by anomalies such as dens invaginatus and palato-gingival groove. Primary anterior teeth may also exhibit external and internal anatomical variations in the root, especially maxillary canines. Therefore, dental practitioners should thoroughly assess all teeth scheduled for root canal treatment to prevent the undesirable consequences caused by inadequate debridement of accessory configurations of the root canal system. PMID:26174943

  3. Non-masticatory uses of anterior teeth of Sima de los Huesos individuals (Sierra de Atapuerca, Spain)

    OpenAIRE

    Lozano Ruiz, Marina; Bermúdez de Castro, José María; Carbonell i Roura, Eudald; Arsuaga, Juan Luis

    2008-01-01

    In this study we examine the labial and occlusal surfaces of incisors and canines of hominins recovered from the Sima de los Huesos (SH), middle Pleistocene site, in order to establish the possible extramasticatory use of anterior teeth.We have compared the microwear of these fossils with microwear from the anterior teeth of Australian Aborigines, a population characterized by ethnographic evidence of the use of their teeth as a third hand. These two samples of teeth were microsco...

  4. The mean visible labial length of maxillary and mandibular anterior teeth at rest

    International Nuclear Information System (INIS)

    To determine the mean visible labial length of maxillary and mandibular anterior teeth at rest. Study Design: Cross-sectional study. Place and Duration of Study: Department of Prosthodontics, Dr. Ishrat-ul-Ebad Khan Institute of Oral Health Sciences, Karachi, from October 2012 to March 2013. Methodology: A total of 200 subjects were included. Measurements were carried out using digital caliper from the border of the lip to the incisal edges of incisor and to the cusp tip for the canines. The length of the upper lip was measured from subnasale to stomion. Statistical analyses were performed by Mann Whitney-U test and Kruskal Walli's test. Results: The age of the participant ranged between 20 and 65 years. At rest, females significantly displayed more of the maxillary central incisor (2.93 +- 1.57 mm; p=0.003), lateral incisor (1.87 +- 1.12 mm; p=0.005) and canine (0.59 +- 0.62 mm; p=0.031). With increasing age, the amount of maxillary anterior teeth visible at rest significantly decreased (p < 0.001), and increased for the mandibular teeth (p < 0.001). Subjects with shorter upper lips significantly displayed more maxillary anterior incisor structure than subjects with longer upper lip (p < 0.001). Conclusion: Females displayed significantly more labial length of the maxillary anterior teeth. The mean visible labial length of maxillary anterior teeth significantly decreased with increasing age and increased for the mandibular teeth. As the upper lip length increased, the mean visible labial length of maxillary anterior teeth significantly decreased. (author)

  5. A CASE OF LOWER ANTERIOR PRIMARY TEETH FUSION

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    Noni Nurseni

    2006-04-01

    Full Text Available Dental fusion is the most common problem seen in the primary dentition. The incidence of dental fusion was approximately 0.5% for deciduous dentition and 0.1% for permanent dentition. Fusion may be complete or incomplete. Its etiology was related to genetic or local factor. These anomalies could result in dental caries, esthetic problem, periodontal disease, dental malocclusion, and hypodontia in permanent dentition. Treatment of fused teeth depends on the location and extent of fusion. This report describes an incomplete dental fusion with dentinal caries occurred on 72 and 73 while 32 was agenesis. The purpose of the treatment was to improve the esthetic performance and subsequently to keep the teeth until the exfoliation time. After the restoration of 72 and 73, the patient feels satisfied.

  6. The Correlation between Different Facial Measurements and the Width of Maxillary Anterior Teeth

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    Hassan Ahangari A.

    2011-08-01

    Full Text Available Statement of Problem: One of the most important procedures in the rehabilitation of an edentulous space in the anterior segment is the selection of an appropriate size of the anterior teeth in order to achieve the perfect esthetic results.Purpose: The purpose of this study was to examine the correlation between horizontal measurements of the face and width of the maxillary anterior teeth.Material and methods: In this descriptive-analytical and cross-sectional study, the face and teeth of the 77 subjects (39 women and 38 men aged between 20-30 with no facial and dental deformities were examined. Some horizontal dimensions of the face including IC (intercanthal, IP (interpupillary, BZW (bizygomatic width, IA (interalar, and ICm (Intercomussural width and perceived width of the teeth were calculated with AutoCAD software with 0.1 mm accuracy on the photos. The actual width of the teeth was calculated with a digital caliper by 0.1 mm accuracy on the maxillary casts. The data were analyzed in SPSS software using the Pearson correlation coefficient and t-test.Results: Except for the IC and the sum of the actual width of the six maxillary anterior teeth on the cast, the rest of the measurements were significantly different by gender ( p < 0.05. All the correlations between facial measurements and width of the teeth were bigger than when they were separated by gender. In women, the correlation between IC and the six anterior teeth in the front view (SANTF was the highest one ( r = 0.436, p = 0.005. However, the highest correlation was related to the ICm and SANTF in men. (r = 0.0501, p =0.001Conclusion: Within the limitation of this study, the results suggest that except for the BZW, the rest of the facial measurements including IC, IP, IA and ICm can be used as a preliminary criterion for determining the width of the maxillary anterior teeth of the edentulous patients.

  7. An unusual presentation of all the mandibular anterior teeth with two root canals - A case report

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    Tiku A

    2005-01-01

    Full Text Available A rare case of two root canals in all mandibular anterior teeth is presented. The patient initially reported for the treatment of mandibular right central and lateral incisors. However, radiographic evaluation revealed variant root canal and apical foramen patterns.

  8. An indirect veneer technique for simple and esthetic treatment of anterior hypoplastic teeth

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    Amit Khatri

    2010-01-01

    Full Text Available This study describes a technique for treating anterior hypoplastic teeth using indirect nanocomposite veneer restoration. The prime advantage of an indirect veneer technique is that it provides an esthetic and conservative result. One of the most frequent reasons that patients seek dental care is discolored anterior teeth. Although treatment options such as removal of surface stains, bleaching, microabrasion or macroabrasion, veneering, and placement of porcelain crowns are available, conservative approach such as veneer preserves the natural tooth as much as possible. Full veneers are recommended for the restoration of localized defects or areas of intrinsic discoloration, which are caused by deeper internal stains or enamel defects. Indirectly fabricated veneers are much less sensitive compared to a operator′s technique and if multiple teeth are to be veneered, indirect veneers can be usually placed much more expeditiously. Indirect veneers last much longer than the direct veneers. Therefore, indirectly fabricated veneers are more advantageous than directly fabricated veneers in many cases.

  9. Pulpal sequelae after trauma to anterior teeth among adult Nigerian dental patients

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    Adekoya-Sofowora Comfort A

    2007-08-01

    Full Text Available Abstract Background Epidemiological studies show that about 11.6% to 33.0% of all boys and about 3.6% to 19.3% of all girls suffer dental trauma of varying severity before the age of 12 years. Moderate injuries to the periodontium such as concussion and subluxation are usually associated with relatively minor symptoms and hence may go unnoticed by the patient or the dentist, if consulted. Patients with these kinds of injuries present years after a traumatic accident most of the time with a single discoloured tooth. This study sets out to document the incidence of various posttraumatic sequelae of discoloured anterior teeth among adult Nigerian dental patients. Methods One hundred and sixty eight (168 traumatized discoloured anterior teeth in 165 patients were studied. Teeth with root canal treatment were excluded from the study. Partial obliteration was recorded when the pulp chamber or root canal was not discernible or reduced in size on radiographs, total obliteration was recorded when pulp chamber and root canal were not discernible. A retrospective diagnosis of concussion was made from patient's history of trauma to the tooth without abnormal loosening, while subluxation was made from patient's history of trauma to the tooth with abnormal loosening. Results Of the 168 traumatized discoloured anterior teeth, 47.6% and 31.6% had partial and total obliteration of the pulp canal spaces respectively, 20.8% had pulpal necrosis. Concussion and subluxation injuries resulted more in obliteration of the pulp canal space, while fracture of the teeth resulted in more pulpal necrosis (p st and 2nd decade of life resulted more in obliteration of the pulp canal space, while injuries sustained in the 3rd decade resulted in more pulpal necrosis. Conclusion Calcific metamorphosis developed more in teeth with concussion and subluxation injuries. Pulpal necrosis occurred more often in traumatized teeth including fractures.

  10. Recurrent unicystic ameloblastoma in mandibular anterior teeth area

    International Nuclear Information System (INIS)

    The unicystic ameloblastoma (UA) is a variant of the solid or multicystic ameloblastoma, a less encountered variant of the ameloblastoma. It appears more frequently in the second or third decade with no sexual or racial predilection. It is almost exclusively encountered asymptomatically in the posterior mandible. We report a case of a 43-year old patient with UA, who had previously undergone a surgical treatment on the same site about 1 year ago, this lesion recurred and presented as an exophytic gingival lesion in the anterior mandibular region.

  11. Aesthetic treatment on anterior teeth crown fracture caused by dental trauma

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    Nanik Zubaidah

    2012-12-01

    Full Text Available Background: Complicated crown fracture is a tooth fracture that involve enamel, dentine and pulp. The incidence of complicated crown fracture ranges from 2% to 13% of all dental injuries and the most commonly involved teeth are the maxillary central incisors. Various treatment modalities are available depending on the clinical, physiological and radiographic examination of the involved teeth. Purpose: The aim of this case report is to present the management of crown fractures with pulpal exposure caused by traumatic injury, through endorestoration approach to reconstruct the shape and function of the teeth. Case: A 17 years old male with complicated crown fractures of anterior teeth #11 #21 and #22. The patient wish for aesthetic dental treatment in both of its form and function. Case management: Crown fractures of anterior teeth with exposed pulp caused by traumatic injury were reconstructed by endorestoration approach. The endodontic treatment with post and core insertion in the root canal which will increase its retention and porcelain fused to metal crown which will aesthetically recover its original form and function. After restoration the patient feel very glad and confident with the result. Conclusion: Endorestoration treatment on anterior teeth with complicated crown fractures and exposed pulp is able to recover the normal form, function and dental aesthetic in accordance with stomatognatic system and self confidence.Latar belakang: Fraktur mahkota kompleks (complicated adalah fraktur pada mahkota gigi yang melibatkan enamel, dentin dan pulpa. Kejadian dari fraktur mahkota kompleks bervariasi antara 2-13% dari semua trauma gigi dan sebagian besar gigi yang terkena adalah gigi insisif pertama rahang atas. Berbagai macam cara perawatan yang dilakukan tergantung pada hasil pemeriksaan klinis, psikologis dan radiografis dari gigi yang terkena. Tujuan: Laporan kasus ini menjelaskan penatalaksanaan fraktur mahkota gigi dengan pulpa terbuka

  12. Clinical comparison of various esthetic restorative options for coronal build-up of primary anterior teeth

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    Himanshu Duhan

    2015-01-01

    Full Text Available Background: This study was designed to compare the clinical performance of composite, strip crowns, biological restoration, and composite with stainless steel band when used for the coronal build-up of anterior teeth. Materials and Methods: A total of 20 patients aged 3-6 years presenting with mutilated primary anterior teeth due to caries or trauma were selected for the study using randomized simple sampling. A total of 52 primary anterior teeth were randomly divided into four equal groups having 13 teeth in each group. Teeth in Group I were restored with composite, in Group II with strip crowns, in Group III with biologic restoration and with stainless steel band reinforced composite in group IV. The restorations were evaluated for color match, retention, surface texture, and anatomic form according to Ryge′s Direct (US Public Health Service evaluation criteria at baseline (immediate postoperative, after 48 h, 3, 6, and 9 months. The data obtained were statistically analyzed using Chi-square test, and level of significance, that is, P value was determined. Results: At baseline, none of the groups showed any color changes. Other than Group III all other groups showed highly significant changes (P 0.05. Deterioration in surface texture was exhibited maximum by restorations in Group IV followed by Group I at 3 months. Whereas, no surface changes were seen in Group II and III. Only Group I and IV showed discontinuity in anatomic form after 3 months. After 6 months, except in Group II, discontinuity in anatomic form was observed in all the groups. Discontinuity in anatomic form was seen in all the 4 groups after 9 months although the difference was not significant (P > 0.05. Conclusion: Biological restoration was found to be most satisfying esthetically owing to color compatibility with the patient′s tooth. Thus, it has a great potential to be used as esthetic restorative option in primary anteriors.

  13. Non-masticatory uses of anterior teeth of Sima de los Huesos individuals (Sierra de Atapuerca, Spain).

    Science.gov (United States)

    Lozano, Marina; Bermúdez de Castro, José M; Carbonell, Eudald; Arsuaga, Juan Luis

    2008-10-01

    In this study we examine the labial and occlusal surfaces of incisors and canines of hominins recovered from the Sima de los Huesos (SH), middle Pleistocene site, in order to establish the possible extra-masticatory use of anterior teeth. We have compared the microwear of these fossils with microwear from the anterior teeth of Australian Aborigines, a population characterized by ethnographic evidence of the use of their teeth as a third hand. These two samples of teeth were microscopically analyzed using Scanning Electron Microscopy (SEM). Our results support the "cultural" origin of microwear observed on fossil teeth: we conclude that the SH hominins used their anterior teeth as a "third hand" for para- or extra-masticatory activities. PMID:18617220

  14. Correlation between some facial indexes and mesiodistal width of maxillary anterior teeth

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    Leila Ahmadian

    2012-01-01

    Full Text Available Background: Both tooth size and shape of the anterior maxilla play important role in complete denture and facial esthetics. Tooth selection for an edentulous patient with no pre-extraction is very difficult. The purpose of this study was to analyze mesio-distal width of maxillary anterior teeth and to determine the presence of any relationship between them and other facial measurements.Materials and Method: In this cross-sectional study, after enrolment of 100 high school students, full-face standardized digital images of them were taken in frontal view. Bizaygomatic, interpupilary and interalar distance were measured by images. Width of teeth was determined on the casts. T-test and pearson correlation coefficient were performed to analyze the data.Results: Maxillary central incisor is the widest anterior tooth in both male and female. Correlation between bizaygomatic and interpupillay distances and central incisor width were not significant but between interalar and intercanine were significant.Conclusion: Based on this study, interalar distance is a better index to estimate the width of anterior teeth of maxilla in an edentulous patient

  15. Morphological measurements of anatomic landmarks in pulp chambers of human anterior teeth.

    Science.gov (United States)

    Lee, Myong M; Rasimick, Brian J; Turner, Aura M; Shah, Rinal P; Musikant, Barry Lee; Deutsch, Allan S

    2007-02-01

    This in vitro study measured key morphological features of pulp chambers in anterior teeth and tested the hypothesis that the distance from the lingual surface (midpoint from the cusp tip to the lingual CEJ) to the pulp chamber (the midpoint from the buccal to the lingual CEJ) was similar for different tooth types. Extracted human teeth were sorted and 100 samples of each of the following tooth types were chosen: maxillary central incisor (UCI), lateral incisor (ULI), and canine (UC), as well as mandibular central incisor (LCI), lateral incisor (LLI), and canine (LC). All teeth were digitally radiographed on a 1-mm X-ray grid. The mean values of measurement C, the distance from the lingual surface to the pulp chamber, varied significantly between tooth types (pUC (5.5+/-0.5)=UCI (5.4+/-0.4)>ULI (5.0+/-0.4)>LLI (4.8+/-0.5)>LCI (4.4+/-0.4). PMID:17258629

  16. Evaluation of maxillary anterior teeth and their relation to the golden proportion in malaysian population

    OpenAIRE

    Al-Marzok Maan Ibrahim; Majeed Kais Raad Abdul; Ibrahim Ibrahim Khalil

    2013-01-01

    Abstract Background The maxillary anterior teeth are important in achieving pleasing dental aesthetics. Various methods are used to measure the size and form of them, including the golden proportion between their perceived widths, and the width-to-height ratio, referred to as the golden standard. The purpose of this study was conducted to evaluate whether consistent relationships exist between tooth width and height of the clinical crown dimensions; and to investigate the occurrence of the go...

  17. Combination esthetic treatment of anterior teeth affected by idiopathic enamel hypoplasia: a case report.

    Science.gov (United States)

    Roberts, Donald L; Warner, Ben F; Bentley, Dan A; Quock, Ryan L

    2016-01-01

    The esthetic management of enamel dysplasia presents an opportunity for the practitioner to integrate expertise in diagnosis, biomaterials, and technique. In addition to considerations of appearance, careful attention must be paid to occlusal function and restorative material properties. This case report highlights a combined approach of conservative lithium disilicate indirect restorations and composite resin direct veneers to electively restore the anterior teeth of a patient diagnosed with idiopathic enamel hypoplasia. PMID:27148656

  18. Functional-aesthetic treatment of crown fracture in anterior teeth with severe crowding

    OpenAIRE

    Diego Henrique da Silva Mendonça; Mario Lúcio da Costa Azevedo; José Carlos Dal Secco Leandrini; Aline Evangelista Souza-Gabriel

    2012-01-01

    Introduction: Traumatic injuries are usually the result of impacts whose aggressive strength exceeds the resistance found in bone, muscle and tooth tissues. With the advent of the etching technique and considering the improvement of composite resins, simpler and more conservative alternatives are indicated in the aesthetic and functional rehabilitation of fractured anterior teeth. Case report and objective: This study aimed to report the treatment of a 13 year-old patient that fractured his ...

  19. Positional changes of the lower and upper anterior teeth after surgical correction of mandibular prognathism

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    Vukadinović Miroslav

    2006-01-01

    Full Text Available Background/Aim. To establish the influence of surgical corrections of mandibular prognathism upon the position of the lower and upper anterior teeth (incisors. Methods. The changes in position of the lower and upper anterior teeth (incisors after the surgical correction of mandibular prognathism were analyzed by means of x-ray craniometry in 183 patients (female: n = 110, male: n = 73 in which the correction had been made in accordance with the principles of sagital osteotomy of the mandibular ramus. There were 4 angular and 2 linear parameters determined in the pre- and postoperative tele-xray-pictures. The changes of these parameters were tested by means of the parametric statistic tests. Results. The performed surgical procedures did not cause statistically significant changes in the angular parameters. The changes of both linear parameters were thought highly statistically significant. Conclusion. Under the influence of the performed surgical procedures no changes were found in the position of anterior teeth (incisors in relation to SN and the mandibular plane. They were actually moved along with the medium fragment of the lower jaw and that fragment was moved linearly backwards along the occlusal plane with a practically insignificant rotation in the cranial direction.

  20. Evaluation of changes in clinical crown length of lower anterior teeth after treatment with Frankel-2′s appliance

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    Arthur C Vasconcelos

    2014-01-01

    Conclusion: It can be concluded that there is a tendency to increase the clinical crown of lower anterior teeth throughout the years after the mandibular advancement treatment by using functional devices, rejecting the null hypotheisis.

  1. Resin-Bonded Fiber-Reinforced Composite for Direct Replacement of Missing Anterior Teeth: A Clinical Report

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    Sufyan Garoushi

    2011-01-01

    Full Text Available Missing anterior teeth is of serious concern in the social life of a patient in most of societies. While conventional fixed partial dentures and implant-supported restorations may often be the treatment of choice, fiber-reinforced composite (FRC resins offer a conservative, fast, and cost-effective alternative for single and multiple teeth replacement. This paper presents two cases where FRC technology was successfully used to restore anterior edentulous areas in terms of esthetic values and functionality.

  2. Polyethylene fiber-reinforced composite resin used as a short post in severely decayed primary anterior teeth: a case report.

    Science.gov (United States)

    Bayrak, Sule; Tunc, Emine Sen; Tuloglu, Nuray

    2009-05-01

    The case report presented here is of a 4-year-old girl with severely decayed maxillary anterior teeth. After root canal treatment, the primary maxillary central and lateral incisors were reinforced using polyethylene fiber-reinforced composite resin short posts and restored using celluloid strip crowns. The technique described here offers a simple and effective method for restoring severely decayed primary anterior teeth that reestablishes function, shape, and esthetics. PMID:19272811

  3. Fiber-reinforced Composite for Chairside Replacement of Anterior Teeth: A Case Report.

    Science.gov (United States)

    Garoushi, S; Vallittu, Pk; Lassila, Lvj

    2008-01-01

    A variety of therapeutic modalities, from implant to conventional Maryland prosthesis, can be used for the replacement of a missing anterior tooth. Whenever a minimal tooth reduction is preferred, a fiber reinforced composite (FRC) prosthesis could be a good alternative to conventional prosthetic techniques, chiefly as temporary restoration before making a final decision on the treatment. The purpose of this case report is to describe the clinical procedure of fabricating anterior chairside FRC prosthesis with pre-impregnated unidirectional E-glass fibers and veneered particulate filler composite. Fiber-reinforced composite in combination with adhesive technology appears to be a promising treatment option for replacing missing teeth. However, further and long-term clinical investigation will be required to provide additional information on the survival of directly-bonded anterior fixed prosthesis made with FRC systems. PMID:21499473

  4. Immediate overdenture for improving aesthetic of anterior teeth with periodontal problem

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    FX. Ady Soesetijo

    2012-03-01

    Full Text Available Background: The construction of overdenture is often applied because endodontic treatment usualy give very promising results and patient has high motivation to maintain their natural teeth. Overdenture is a removable partial or complete denture that covers and rests on one or more remaining natural teeth, roots and/or dental implants. The presence of retained teeth can maximize retention, stabilization and prevent trauma to the oral mucosa. Meanwhile, the presence of root in the bone can delay resorption of the alveolar process. The role of proprioceptor in the periodontal ligament abutment teeth remains effective. Thus, it can be said the overdenture treatment is a preventive prosthodontic treatment. Purpose: The purpose of this case report was to present a case of maxillary and mandibullary anterior teeth with periodontal disease, through endodontic and prosthodontic treatments for recovering its function of phonetic and aesthetic. Case: The 25 years old female with periodontal problems (protrusive, wiggly °1–°2 and along with gingival retraction on 12, 11, 21, 22 and 32, 31, 41, 42. The patient felt bad about his performance and affect his self confidence. The patient visited tthe dental hospital to restore her teeth and recovering aesthetic and phonetic functions. Case management: The overdenture inserted immediately after one visit endodontic treatment and cutting off the clinical crown of the teeth. The adaptation of the denture is needed by relining using self cured acrylic resin. The patient was quite satisfied with the treatment. Conclusion: In conclusion, the maxillary and mandibullary anterior teeth with periodontal problem could be managed through conservative and prosthotontic approach of treatment to recover of its performance and function.Latar belakang: Konstruksi overdenture sering diaplikasikan pada pasien, karena perawatan endodontik memberikan hasil perawatan yang sangat menjanjikan dan pasien memiliki motivasi tinggi

  5. Functional-aesthetic treatment of crown fracture in anterior teeth with severe crowding

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    Diego Henrique da Silva Mendonça

    2012-09-01

    Full Text Available Introduction: Traumatic injuries are usually the result of impacts whose aggressive strength exceeds the resistance found in bone, muscle and tooth tissues. With the advent of the etching technique and considering the improvement of composite resins, simpler and more conservative alternatives are indicated in the aesthetic and functional rehabilitation of fractured anterior teeth. Case report and objective: This study aimed to report the treatment of a 13 year-old patient that fractured his central incisor due to a trauma. After clinical and radiographic examination, an oblique crown fracture with extensive involvement of the incisal angle, without pulp exposure or injury to the biological space of the left maxillary central incisor (tooth #21 was observed. Because the fractured tooth fragment was lost, it was not possible to process a fragment bonding. Thus, it was proposed to treat the tooth through direct technique restoration with composite resin. Conclusion: It can be concluded that the aesthetic and functional rehabilitation with direct composite resin is a viable option for the conservative treatment of fractured anterior teeth.

  6. Anterior and middle superior alveolar nerve block for anesthesia of maxillary teeth using conventional syringe

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    Ignacio Velasco

    2012-01-01

    Full Text Available Background: Dental procedures in the maxilla typically require multiple injections and may inadvertently anesthetize facial structures and affect the smile line. To minimize these inconveniences and reduce the number of total injections, a relatively new injection technique has been proposed for maxillary procedures, the anterior and middle superior alveolar (AMSA nerve block, which achieves pulpal anesthesia from the central incisor to second premolar through palatal approach with a single injection. The purpose of this article is to provide background information on the anterior and middle superior alveolar nerve block and demonstrate its success rates of pulpal anesthesia using the conventional syringe. Materials and Methods: Thirty Caucasian patients (16 men and 14 women with an average age of 22 years-old, belonging to the School of Dentistry of Los Andes University, were selected. All the patients received an AMSA nerve block on one side of the maxilla using the conventional syringe, 1 ml of lidocaine 2% with epinephrine 1:100.000 was injected to all the patients. Results: The AMSA nerve block obtained a 66% anesthetic success in the second premolar, 40% in the first premolar, 60% in the canine, 23.3% in the lateral incisor, and 16.7% in the central incisor. Conclusions: Because of the unpredictable anesthetic success of the experimental teeth and variable anesthesia duration, the technique is disadvantageous for clinical application as the first choice, counting with other techniques that have greater efficacy in the maxilla. Although, anesthetizing the teeth without numbing the facial muscles may be useful in restorative dentistry.

  7. Clinical Efficiency of Two Sequences of Orthodontic Wires to Correct Crowding of the Lower Anterior Teeth

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    Cláudia Maria de Castro Serafim

    2015-01-01

    Full Text Available This study compared time to correction of mandibular anterior crowding using two arch wire sequences, one with conventional nickel-titanium (NiTi arch wires and the other with conventional and NiTi heat-activated arch wires. Twenty-two boys and girls (mean age: 16.68 ± 2.66 with moderate crowding (3–6 mm were assigned randomly to one of two groups and followed up for five months (six assessments when arch wires were changed. Time to crowding correction was analyzed statistically using the Kaplan-Meier method. Data were collected during the five-month follow-up, and time to correction was compared between groups using the log rank test. At the end of follow-up, mandibular crowding was corrected in 100% of the cases in the group treated with the sequence that included NiTi heat-activated arch wires, whereas about 30% of those treated with NiTi arch wires were not completely corrected. There was a significant difference in time to complete treatment between groups (log rank = 5.996; p<0.05. In the group treated with the sequence that included heat-activated wires, alignment and leveling of mandibular anterior teeth were completed earlier than in the group treated only with conventional NiTi arch wires. Clinical trial registration is found at RBR-7g5zng.

  8. Comparative photographic evaluation of various geometric and mathematical proportions of maxillary anterior teeth: A clinical study

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    Vineet S Agrawal

    2016-01-01

    Full Text Available Aim: This study aimed to investigate the existence of the golden proportion, recurring esthetic dental (RED proportion and golden percentage between the frontal view widths of the maxillary anterior natural dentition among students of Indian origin by the aid of digital photography. Materials and Methods: This study was conducted with 80 dental students (41 female and 39 male, with ages ranging from 20 to 23 years. Students whose natural smile did not develop any visual tension with regard to the study′s and their own criteria were selected as having an esthetic smile. Photographs were taken, and the mesiodistal widths of six maxillary anterior teeth were measured digitally using software. Once the measurements were recorded three different theories of proportion were applied and statistical analysis was done. Results: The golden proportion, i.e., 62% RED proportion and golden percentage were not observed in the subjects. According to the subjects evaluated, the average width of the maxillary lateral incisor was 72% of the frontal view width of the central incisor. The average width of the canine was 84% of the frontal view width of the lateral incisor. Conclusion: The golden proportion and RED proportion were not observed in the natural smiles of subjects who were deemed to have an esthetic smile. The values proposed for the golden percentage theory were not observed in subjects with an esthetic smile. Average frontal view percentage widths of the maxillary anterior dentition exist and can be useful in predicting naturally occurring widths in smiles deemed to be esthetic in a specific population.

  9. In vitro evaluation of fracture resistance of Fiber-Reinforced Composite inlay bridges in upper anterior and lower posterior teeth

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    Jalalian E.

    2007-07-01

    Full Text Available Background and Aim: Considering flexural strength of fiber-reinforced composites (FRC and also the role of conservative cavities in protecting sound tissue of abutments, the aim of this study was to evaluate the fracture resistance of these bridges by handmade samples in vitro.Materials and Methods: In this experimental in vitro study, 44 sound newly extracted teeth were used to make 22 fixed inlay bridges including 11 three unit anterior upper inlay bridges substituting clinical model of upper central and 11 three unit posterior lower inlay bridges substituting clinical model of lower first molar. Specimens were prepared with FRC and mounted with artificial PDL in acryl. Cases were exposed to final load by using Universal Testing Machine (Instron 1195 with the speed of 1 mm/min. Statistical analysis was performed by Kolmogorov- Smirnov, independent sample T and Kaplan-Meier tests with p<0.05 as the level of significance.Results: Based on the statistical tests, the 95% confidence interval of mean was 450-562 N in anterior and  1473- 1761 N in posterior area. Fracture strength was high in the studied groups. Fractures in both groups occurred on composite facing, and the framework remained intact. The highest percentage of fracture in posterior teeth was in the middle of pontic towards the distal connector and in the anterior teeth in the lateral connector, between central pontic and lateral abutment. Using the independent sample T  test a significant statistical difference was observed between two groups (P<0.001. The fracture resistance of anterior samples was lower than the posterior ones.Conclusion: Based on the results of this study regarding the high fracture resistance in both areas FRC inlay bridges could be recommended for upper anterior and lower posterior teeth in clinical dentistry certainly more studies are needed to ascertain this treatment option.

  10. Root and canal symmetry in the mandibular anterior teeth of patients attending a dental clinic: CBCT study

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    Guven KAYAOGLU

    2015-01-01

    Full Text Available The aims of this study were to evaluate the number of roots/root canals in the mandibular anterior teeth of a Turkish population, to assess the relationship between gender or age and the frequency of two canals in a single root, and to determine the symmetry in root/root canal numbers between contralateral sides among patients. Cone-beam computed tomography images (n = 1128; 6253 teeth taken at the Department of Dentomaxillofacial Radiology of the Faculty of Dentistry of Gazi University were examined by three observers and a supervisor, all of whom were blinded to patient gender and age. Axial, sagittal, and cross-sectional slices with a thickness of 1 mm were used. Numbers of roots and canals for each type of tooth were recorded. Most teeth had a single root and single root canal. Roots with two canals were more frequent in the incisors (14.9%, 17.2%, and 6.1% of the central incisors, lateral incisors, and canines, respectively. Teeth with two roots were more frequent in the canines (3.1%vs. 0% or 0.1%. Females more often had canines with double root canals (p < 0.001. When at least one tooth had two root canals, bilateral symmetry between contralateral teeth was found in 45.0%, 29.0%, and 28.0% of cases for central incisors, lateral incisors, and canines, respectively. Patients older than 56 years had fewer teeth with double root canals (p ≤ 0.001. A small proportion of the mandibular anterior teeth had two roots or root canals. Double root canals were mostly unilateral. Age and gender were associated with the number of root canals.

  11. Use of ribbond and panavia F cement in reattaching fractured tooth fragments of vital maxillary anterior teeth

    OpenAIRE

    Hemalatha Hiremath; Sadanand Kulkarni; S Saikalyan; Rashmi Chordhiya

    2012-01-01

    Coronal fractures of the anterior teeth are a common form of dental trauma that mainly affects children and adolescents. One of the options for managing coronal tooth fractures when the tooth fragment is available and there is no or minimal violation of the biological width is the reattachment of the fragment. This article presents a novel technique for reattachment of oblique fractured fragment of vital maxillary central and lateral incisor with pulp exposure. Pulp capping was done using min...

  12. Fracture resistance of endodontically treated permanent anterior teeth restored with three different esthetic post systems: An in vitro study

    OpenAIRE

    Ameet J Kurthukoti; Jaya Paul; Kapil Gandhi; Divya B J Rao

    2015-01-01

    Background: Esthetic coronal reconstruction of fractured anterior teeth is often performed using intra radicular posts. Most of the commonly used commercially esthetic post systems do not exhibit similar physical properties as dentin resulting in failures. Aim: To evaluate and compare the fracture resistance and mode of failure of simulated traumatized permanent central incisors restored with three different post systems including biologic dentin posts. Materials and Methods: A total of 40 re...

  13. Prevalence of Traumatic Dental Injuries to Anterior Teeth of 12-Year-Old School Children in Kashmir, India

    Science.gov (United States)

    Ain, Tasneem S.; Lingesha Telgi, Ravishankar; Sultan, Saima; Tangade, Pradeep; Ravishankar Telgi, Chaitra; Tirth, Amit; Kumar Pal, Sumit; Gowhar, Owais; Tandon, Vaibhav

    2016-01-01

    Background Traumatic dental injuries to anterior teeth are a significant public health problem, not only because their prevalence is relatively high, but also because they have considerable impact on children’s daily lives. Traumatic dental injuries (TDIs) cause physical and psychological discomfort, pain and other negative impacts, such as tendency to avoid laughing or smiling, which can affect social relationships. Objectives This study aimed to assess the prevalence of traumatic dental injuries to anterior teeth among 12-year-old school children in Kashmir, India. Patients and Methods A cross-sectional study was conducted in private and government schools of India among 1600 schoolchildren aged 12 years. In addition to recording of the type of trauma (using Ellis and Davey classification of fractures, 1970), over jet, Angle’s molar relation and lip competence were also recorded. The socioeconomic status and academic performance of the study subjects were registered. The data obtained were compiled systematically and then statistically analyzed. The statistical significance for the association between the traumatic injury and the variables was analyzed using the chi-square test. Logistic regression was used to identify potential risk predictors of TDIs. Results The overall prevalence of TDI to anterior teeth was found to be 9.3%. The TDI to anterior teeth in male was more than female, but the difference was statistically nonsignificant (P < 0.01). Falls and sports were the most common causes of trauma in the present study. The highest potential risk factor for the occurrence of trauma was over jet. Academic performance was found to be significantly associated to TDI to anterior teeth, when analyzed in a multiple regression model. Conclusions It was concluded that the prevalence of traumatic dental injuries was 9.3%. Traumatic dental injuries among children exhibit complex interaction between the victims’ oral conditions and their behavior. Therefore

  14. Prevalence of Traumatic Dental Injuries to Anterior Teeth of 12-Year-Old School Children in Kashmir, India

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    Ain

    2016-01-01

    Full Text Available Background Traumatic dental injuries to anterior teeth are a significant public health problem, not only because their prevalence is relatively high, but also because they have considerable impact on children’s daily lives. Traumatic dental injuries (TDIs cause physical and psychological discomfort, pain and other negative impacts, such as tendency to avoid laughing or smiling, which can affect social relationships. Objectives This study aimed to assess the prevalence of traumatic dental injuries to anterior teeth among 12-year-old school children in Kashmir, India. Patients and Methods A cross-sectional study was conducted in private and government schools of India among 1600 schoolchildren aged 12 years. In addition to recording of the type of trauma (using Ellis and Davey classification of fractures, 1970, over jet, Angle’s molar relation and lip competence were also recorded. The socioeconomic status and academic performance of the study subjects were registered. The data obtained were compiled systematically and then statistically analyzed. The statistical significance for the association between the traumatic injury and the variables was analyzed using the chi-square test. Logistic regression was used to identify potential risk predictors of TDIs. Results The overall prevalence of TDI to anterior teeth was found to be 9.3%. The TDI to anterior teeth in male was more than female, but the difference was statistically nonsignificant (P < 0.01. Falls and sports were the most common causes of trauma in the present study. The highest potential risk factor for the occurrence of trauma was over jet. Academic performance was found to be significantly associated to TDI to anterior teeth, when analyzed in a multiple regression model. Conclusions It was concluded that the prevalence of traumatic dental injuries was 9.3%. Traumatic dental injuries among children exhibit complex interaction between the victims’ oral conditions and their behavior

  15. Aesthetic treatment on anterior teeth crown fracture caused by dental trauma

    OpenAIRE

    Nanik Zubaidah

    2012-01-01

    Background: Complicated crown fracture is a tooth fracture that involve enamel, dentine and pulp. The incidence of complicated crown fracture ranges from 2% to 13% of all dental injuries and the most commonly involved teeth are the maxillary central incisors. Various treatment modalities are available depending on the clinical, physiological and radiographic examination of the involved teeth. Purpose: The aim of this case report is to present the management of crown fractures with pulpal expo...

  16. Fixed functional space maintainer: novel aesthetic approach for missing maxillary primary anterior teeth

    OpenAIRE

    Khare, Vikram; Nayak, Prathibha Anand; Khandelwal, Vishal; Nayak, Ullal Anand

    2013-01-01

    The first-line treatment of non-restorable traumatically injured or carious deciduous teeth is extraction which may be a curse for the future dentition as well as social activity of a child. Various therapeutic modalities from removable partial dentures to fixed space maintainer can be used for replacement of such lost teeth. Two types of fixed aesthetic space maintainers for replacing premature loss of maxillary deciduous incisors in 4-year-old children are discussed.

  17. Interdisciplinary approach for the treatment of periodontally compromised malpositioned anterior teeth: a case report

    OpenAIRE

    Kasaj, Adrian; Wehrbein, Heiner; Gortan-Kasaj, Aristea; Reichert, Christoph; WILLERSHAUSEN, Brita

    2009-01-01

    Today many adult patients with periodontal disease demonstrate positioning of teeth that comprise their ability for proper mechanical tooth cleaning of approximal tooth surfaces. With adequate combined periodontal-orthodontic treatment it is possible to re-establish a healthy and well-functioning dentition. However, while orthodontic treatment can realign periodontally affected teeth, esthetic appearance may be compromised by gingival recession due to alveolar bone dehiscences or fenestration...

  18. Treatment of anterior open bite and multiple missing teeth with lingual fixed appliances, double jaw surgery, and dental implants.

    Science.gov (United States)

    Jung, Min-Ho; Baik, Un-Bong; Ahn, Sug-Joon

    2013-04-01

    The treatment of adult patients with severe anterior open bite frequently requires orthognathic surgery, especially when the chin is retruded severely. If a patient has multiple missing posterior teeth, it is difficult to control the occlusal plane because it is challenging to obtain anchorage during orthodontic treatment. We report on a 25-year-old woman who had a skeletal Class II malocclusion, severe anterior open bite, vertical maxillary asymmetry, and severe dental caries on her molars. There was no posterior occlusal contact between the maxillary and mandibular molars since 5 of her molars had to be extracted because of severe caries. Lingual fixed appliances and double jaw surgery were performed to treat her skeletal and dental problems, and dental implants helped restore her masticatory function. Pretreatment, posttreatment, and retention photographs demonstrate effective, esthetically pleasing, and stable treatment results. PMID:23540629

  19. Prevalence of traumatic dental injuries to the anterior teeth among three to thirteen-year-old school children of Tamilnadu

    Directory of Open Access Journals (Sweden)

    Mohan Govindarajan

    2012-01-01

    Full Text Available Context: Dental trauma has become an important attribute of dental public health. The primary requisite before actively dealing with such problems is to describe the extent, distribution, and associated variables with the specific condition. Aims: The aim of the present study was to assess the prevalence and distribution of traumatic dental injuries (TDI to anterior teeth among 3 to 13 years old Chidambaram school children. Settings and Design : A cross-sectional study was conducted. Data was collected through a survey form and clinical examination. Materials and Methods: A total of 3200 school children in the age group of 3-13 years were selected from 10 schools of Chidambaram, Tamilnadu. Information concerning sex, age, cause of trauma, number of injured teeth, type of the teeth, lip competence, terminal plane relationship and the molar relationship were recorded. Statistical Analysis Used: The statistical software EPIINFO (Version 6.0 was used for statistical analysis. In the present study, P≤0.05 was considered as the level of significance. Results: The trauma prevalence in the present study was 10.13%. Children with class I type 2 and mesial step molar relationship exhibited more number of dental injuries. Enamel fracture was the most common injury recorded. Only 3.37% of the children had undergone treatment. Conclusion: The high level of dental trauma and low percentage of children with trauma seeking treatment stresses the need for increased awareness in Chidambaram population.

  20. An anterior cervical retractor utilizing a novel principle.

    Science.gov (United States)

    Seex, Kevin A

    2010-05-01

    The alarmingly high soft-tissue complication rates after anterior cervical surgery suggests that the design of current retractors is inadequate. A review of retractor design and consideration of new designs is worthwhile. The author reviewed the literature and the 7 described devices (Cloward, Caspar, Thompson-Farley, Tresserras, Ozer, Takayasu, and Oh devices). With the exception of Cloward/Caspar and Thomson-Farley systems, the author's search of the literature failed to disclose any independent review or investigations of the other retractors, suggesting that the use of these devices is limited. The Cloward/Caspar-style retractors depend for stability on small teeth at the ends of the blades that impale and stretch the longus colli muscle. For stability this self-retaining design requires equal tissue counterpressure. These devices are thus ill suited for a wound with substantially greater pressure from the medial structures and are prone to migration. The Thomson-Farley type of systems use arms with mechanical joints fixed to a table-mounted frame. The releasable joints allow adjustability and independent relaxation. Their limitations include bulk causing obstruction to the surgeons and radiographs, increased setup time, and ease with which excessive force can be applied. The author describes a new anterior cervical retractor that is based on a novel principle. The principle is that bone fixation can be used to provide the retractor blade an axis of rotation inside the wound. This gives improved retractor blade stability with the mechanical advantage of a lever. The stable rotation produced allows adjustable retraction and tissue relaxation without compromise in stability. To the author's knowledge, there are no previously described retractors with this ability. The system consists of a small 2-piece sliding frame fixed to the spine with the distraction screws. Bone fixation is preferable to sharp teeth and longus colli dissection because it works better and

  1. [Extraction of the deciduous anterior teeth and its consequences in children with the nursing bottle syndrome].

    Science.gov (United States)

    Wetzel, W E; Grieb, A; Pabst, W

    1993-01-01

    On eighty children, whose rampant carious and predominant periapical diseased deciduous maxillary incisors had been formerly extracted, the outcomes of the early extraction were inspected in regard to the later development of the permanent teeth and the general state of health. For 68 children gypsum models were analysed, whether the early loss of deciduous incisors had led to deficiency of place in the front of the upper jaw. The early tooth extraction and conservation therapy resulted in a clear improvement of children's physical condition and ameliorated the starting situation of permanent teeth to be preserved healthy. The earlier the milk-incisors had to been extracted the greater was the danger of a belated eruption of the permanent incisors. PMID:8511550

  2. The influence of erupting lateral teeth on maxillary anterior crowding in two Angle Class I maloclussion cases with high and low angles

    OpenAIRE

    Hiroshi Ueda; Morio Masunaga; Cynthia Concepcion; Kazuo Tanne

    2016-01-01

    Two cases of anterior crowding, both Skeletal Class I and Angle Class I maloclussion, one being low angle and the other high angle respectively, respectively, were treated and evaluated to ascertain whether or not there is a relationship among disproportionate mesial axial angulation of the maxillary lateral teeth and the Frankfurt Horizontal-Functional Occlusal plane, therefore generating maxillary anterior crowding. Both cases were Japanese boys, the first one aged 9 years 10 months with ch...

  3. Use of ribbond and panavia F cement in reattaching fractured tooth fragments of vital maxillary anterior teeth

    Directory of Open Access Journals (Sweden)

    Hemalatha Hiremath

    2012-01-01

    Full Text Available Coronal fractures of the anterior teeth are a common form of dental trauma that mainly affects children and adolescents. One of the options for managing coronal tooth fractures when the tooth fragment is available and there is no or minimal violation of the biological width is the reattachment of the fragment. This article presents a novel technique for reattachment of oblique fractured fragment of vital maxillary central and lateral incisor with pulp exposure. Pulp capping was done using mineral trioxide aggregate. Orthodontic extrusion was done to expose the sub gingival fractured site. Polyethylene fiber (ribbond and panavia F cement were used to reattach the fractured fragment using an internal groove technique to provide high fracture strength to restored tooth. Ribbond fibers can be used to give additional strength to the reattached tooth fragment so that the tooth obtains fracture resistance equal to an intact tooth.

  4. Standards of teeth preparations for anterior resin bonded all-ceramic crowns in private dental practice in Jordan

    Directory of Open Access Journals (Sweden)

    Ziad Nawaf AL-Dwairi

    2011-08-01

    Full Text Available OBJECTIVES: To investigate if general dental practitioners (GDPs in private practice in Jordan follow universal guidelines for preparation of anterior teeth for resin bonded all-ceramic crowns (RBCs. MATERIAL AND METHODS: A sample (n=100 of laboratory models containing 208 tooth preparations for IPS Empress and In Ceram, featuring work from different GDPs, was obtained from 8 commercial dental laboratories. Aspects of preparations were quantified and compared with accepted criteria defined following a review of the literature and recommendations of the manufactures' guidelines. RESULTS: Subgingival margins on the buccal aspect were noticed in 36% of the preparations, 54% demonstrated overpreparation with a tendency to overprepare the teeth on the mesiodistal plane more than buccolingual plane. Twenty percent of samples presented a shoulder finish line while a chamfer margin design was noticed in 39%. Twenty-nine percent and 12% of samples had either a feathered or no clear margin design respectively. Incisal underpreparation was observed in 18% of dies of each type. Only 17% of all preparations were found to follow the recommended anatomical labial preparations while 29% of the RBC preparations were found to have the recommended axial convergence angle. In total, 43% of preparations were found to have the recommended depth of the finish line. CONCLUSIONS: It was found that relevant guidelines for RBC preparations were not being fully adhered to in private practice in Jordan.

  5. Esthetic rehabilitation of anterior primary teeth using polyethylene fiber with two different approaches

    Directory of Open Access Journals (Sweden)

    M Jain

    2011-01-01

    Full Text Available An acceptable treatment approach for early childhood caries in the past may not necessarily be the best treatment option for our young patients today. Technological advances in dental materials and the approach to their use need to be considered, and the introduction of new adhesive systems, restorative materials, and the approach toward treating these teeth has yielded convincing results. Two such clinical case reports where polyethylene fibers were used as intra-canal posts and to splint the pontic fabricated with polyethylene fibers reinforced composite are reported.

  6. Fusion and Gemination in a Primary Mandibular Anterior teeth - A Case Report.

    Directory of Open Access Journals (Sweden)

    Prasanna Kumar Rao

    2014-04-01

    Full Text Available Tooth fusion is one of the rare anomalies of the shape of the tooth. It is due to the union of two separate tooth germs. Tooth fusion and gemination in mandibular primary teeth has very little documentation in Indian population. These conditions requires a minimal intervention approach, preventive procedures, and a long-term follow-up. Here we report a rare case of fusion between left mandibular primary central and lateral incisors and gemination in right primary mandibular lateral incisor in a four year old boy. [Cukurova Med J 2014; 39(2.000: 336-338

  7. Cone-beam computed tomography study of the root and canal morphology of mandibular permanent anterior teeth in a Chongqing population

    Science.gov (United States)

    Zhengyan, Yang; Keke, Lu; Fei, Wang; Yueheng, Li; Zhi, Zhou

    2016-01-01

    Objective To investigate the root and canal morphology of permanent mandibular anterior teeth in a Chongqing population using cone-beam computed tomography (CBCT). Methods CBCT images of 1,725 patients in a Chongqing population were selected, and a total of 9,646 mandibular anterior teeth were analyzed. The number of root canals and the canal configurations were investigated. Results In total, 0.3% (11/3,257) of lateral incisors and 0.8% (26/3,014) of canines had double roots, and 3.8% (127/3,375) of central incisors, 10.6% (345/3,257) of lateral incisors, and 4.2% (127/3,014) of canines had multi-root canals. The difference in the incidence of multi-canals in lateral incisors between female and male was statistically significant. The frequency of multi-canals in the different age groups was 5.0% for central incisors for ages 21–30 years, 14.7% for lateral incisors for ages 41–50 years, and 8.1% for canines for ages 41–50 years. Conclusion With the limitations of the current study, we found that a high percentage of mandibular anterior teeth had multiple canals in the studied Chinese Chongqing population. The current data may provide clinicians practicing in Chongqing with a more thorough understanding of root canal morphology. PMID:26730198

  8. Survival of Composite Resin Restorations of severely Decayed Primary Anterior Teeth retained by Glass Fiber Posts or Reversed-orientated Metal Posts

    Science.gov (United States)

    Ranjkesh, Bahram; Lovschall, Henrik; Erfanparast, Leila; Jafarabadi, Mohammad A; Oskouei, Sina Ghertasi; Isidor, Flemming

    2016-01-01

    ABSTRACT Aim: The aim of this study was to compare the survival of composite resin restorations retained by glass fiber posts or reversed-orientated (upside-down) metal posts in severely decayed primary anterior teeth after 6, 12, and 18 months. Materials and methods: A total of forty-four 3- to 5-year-old children with bilateral severely decayed primary maxillary canines were included. Patients were treated under general anesthesia. After pulpectomy, an intracanal post was seated in the primary maxillary canine on each side: either a glass fiber post or a metallic post in reversed orientation and teeth restored with light-cured composite. Survival rate of each technique was evaluated at predetermined follow-ups and data were analyzed with McNemar’s test (α = 0.05). Results: The difference in survival of restorations retained by two types of posts was not statistically significant in clinical and radiographical evaluations after 6, 12, and 18 months. The survival rate of reversed-orientated metal and glass fiber posts after 18 months was 81.1 and 67.6% respectively (p = 0.14). Conclusion: Reversed-orientated metal post did not show lower clinical survival compared with glass fiber posts in 18-month follow-up. Hence, reversed-orientated metal post can be considered as a potential method to obtain retention for composite restorations in severely decayed primary anterior teeth. How to cite this article: Vafaei A, Ranjkesh B, L0vschall H, Erfanparast L, Jafarabadi MA, Oskouei SG, Isidor F. Survival of Composite Resin Restorations of severely Decayed Primary Anterior Teeth retained by Glass Fiber Posts or Reversed-orientated Metal Posts. Int J Clin Pediatr Dent 2016;9(2):109-113. PMID:27365929

  9. The influence of erupting lateral teeth on maxillary anterior crowding in two Angle Class I maloclussion cases with high and low angles

    Directory of Open Access Journals (Sweden)

    Hiroshi Ueda

    2016-01-01

    Full Text Available Two cases of anterior crowding, both Skeletal Class I and Angle Class I maloclussion, one being low angle and the other high angle respectively, respectively, were treated and evaluated to ascertain whether or not there is a relationship among disproportionate mesial axial angulation of the maxillary lateral teeth and the Frankfurt Horizontal-Functional Occlusal plane, therefore generating maxillary anterior crowding. Both cases were Japanese boys, the first one aged 9 years 10 months with chief complaint being anterior crowding and the second case aged 7 years and 8 months complaining of inadequate space for satisfying canine eruption. During and after the second stage of orthodontic treatment on both cases, several radiographic analysis were performed to assess treatment progress and retention; from these radiographs, it was noticed among other findings that in the high-angle case, the axial angulations of the maxillary lateral incisors were markedly smaller than in the low-angle case, thus indicating mesial tipping in the upper dental arch. This decreased mesial axial angulation of the lateral teeth observed at high angles may potentially cause maxillary space deficiency.

  10. Evaluation of threshold response and appropriate electrode placement site for electric pulp testing in fluorosed anterior teeth: An in vivo study

    Science.gov (United States)

    Vemisetty, Harikumar; Vanapatla, Amulya; Ravichandra, Polavarapu Venkata; Reddy, Surakanti Jayaprada; Punna, Rajani; Chandragiri, Srujana

    2016-01-01

    Background: Accurate diagnosis is key to success. Diagnosing the pulpal status in varied clinical situations poses a challenge to the clinician. Electric pulp test (EPT) is one of the valuable attempts in evaluating the sensibility of pulp tissue. The aim of this study was to find out and compare the threshold levels and optimal electrode placement site for EPT in fluorosed and nonfluorosed anterior teeth. Materials and Methodology: Eighty volunteers recruited for this study were divided into two groups based on the incidence of dental fluorosis. Electric pulp testing was done on either of the central incisors in fluorosed and nonfluorosed group. Four sites on each crown were tested 4 times with digitest electric pulp tester, and the mean of the threshold responses was recorded. The data were analyzed with SPSS, version 11. Means of variables from each location were compared using one-way ANOVA and Tukey's post-hoc test while the critical level of significance was set at P 0.05). Conclusion: Within the limitations of this study, it can be concluded that fluorosed teeth respond to higher threshold levels than the non-fluorosed teeth, and incisal edge was the optimal electrode placement site. PMID:27274345

  11. Investigation of shade selection on all-ceramic restorations of anterior teeth%全瓷修复体前牙比色现况调查

    Institute of Scientific and Technical Information of China (English)

    刘莹莹; 王芳; 钟晓霞; 邓华颉

    2013-01-01

    Objective: The aim of the survey was to obtain the basic information of shade selection on all-ceramic restorations of the anterior teeth so as to enhance doctor's understanding of color matching and improve their quality of shade selection. Method:474 pieces of anterior teeth working authorizations of all-ceramic restorations were divided into three groups according to the level of consignor. The questionnaire included tooth position, patient age, gender, including doctor partition colorimetric, whether digital photography auxiliary colorimetric or whether to record color special anatomical structure of the patient characteristics including stained, cracked, developmental ditch projects. Result: The statistical test showed there was significant difference in patient age, gender, doctor partition colorimetric and digital photography auxiliary colori- metric among these three groups. Conclusion: In this survey, the quality of shade selection on all-ceramic restorations of anterior teeth is generally ignored by dentists. Doctors for the partition colorimetric and digital photography auxiliary colorimet- ric technique needs to be future strengthened.%目的:了解全瓷修复体前牙比色情况,增强医生对全瓷牙与天然牙颜色匹配度的认识,进一步提高修复体比色质量.方法:搜集全瓷修复体前牙加工单共474份,根据医生所在单位等级将加工单分为3组,对其比色信息进行调查.调查内容包括患者牙位、年龄、性别,包括医生是否分区比色或特殊配色、是否有数码摄影辅助比色、是否记录患者特征色,特殊解剖结构,包括染色、隐裂、发育沟等项目.结果:3组调查项目的差异主要集中在年龄、性别、分区比色或特殊配色、数码摄影辅助比色方面.结论:全瓷修复体前牙的比色表达情况受到普遍忽视,医生对于全瓷材料前牙的分区比色或数码摄影辅助比色等技术有待进一步加强.

  12. Anchorage onto deciduous teeth: effectiveness of early rapid maxillary expansion in increasing dental arch dimension and improving anterior crowding

    OpenAIRE

    Mutinelli, Sabrina; Manfredi, Mario; Guiducci, Antonio; Denotti, Gloria; Cozzani, Mauro

    2015-01-01

    Background Anchorage onto permanent dentition is a common procedure in rapid maxillary expansion. However, replacing first permanent molars with the second deciduous molars seems to be an option to reduce some negative side effects during orthodontic treatment. The purpose of this study was to evaluate the dental effect of rapid maxillary expansion with anchorage exclusively onto deciduous teeth performed in the first period of transition. Methods Twenty patients with a lateral cross-bite tre...

  13. The Role of Mandibular Third Molars on Lower Anterior Teeth Crowding and Relapse after Orthodontic Treatment: A Systematic Review

    Directory of Open Access Journals (Sweden)

    Khalid H. Zawawi

    2014-01-01

    Full Text Available Aims. To evaluate the role of third molars in the development of crowding or relapse after orthodontic treatment in the anterior segment of the dental arch. Methods. PubMed search of the literature was performed selecting all the articles relevant to the topic and limiting the studies to controlled trials on humans and written in English language. Systematic review was conducted according to the PRISMA (preferred reporting items for systematic reviews and meta-analyses statement. Results. A total of 12 clinical studies were included in the review. A high risk of bias was found in most of the articles, either because the relative items assessed were inadequate or because they were unclearly described. The third molars were not correlated with more severe anterior tooth crowding in most of the studies. However, four of them described a different outcome. Conclusion. Definitive conclusions on the role of the third molars in the development of anterior tooth crowding cannot be drawn. A high risk of bias was found in most of the trials, and the outcomes were not consistent. However, most of the studies do not support a cause-and-effect relationship; therefore, third molar extraction to prevent anterior tooth crowding or postorthodontic relapse is not justified.

  14. Effect of CPP-ACP Paste on Enamel Carious Lesion of Primary Upper Anterior Teeth Assessed by Quantitative Light-Induced Fluorescence: A One-Year Clinical Trial.

    Science.gov (United States)

    Sitthisettapong, Thanya; Doi, Takashi; Nishida, Yuhei; Kambara, Masaki; Phantumvanit, Prathip

    2015-01-01

    The purpose of this clinical trial was to evaluate the effect of 1 year of daily application of 10% w/v CPP-ACP (casein phosphopeptide-amorphous calcium phosphate) paste in addition to regular toothbrushing with fluoridated toothpaste on the remineralization of enamel carious lesions in preschool children using quantitative light-induced fluorescence (QLF). A total of 103 Thai children (aged 2(1)/2-3(1)/2 years) with high caries risk who had at least 1 enamel carious lesion (ICDAS 1-3) on the labial surface of the upper anterior teeth were assigned to receive either CPP-ACP paste (n = 53) or placebo control (n = 50) following toothbrushing with fluoridated toothpaste after lunch at school. QLF measurement was performed at baseline, 6 months and 1 year. At 1 year, a significant reduction in fluorescence loss (ΔF), lesion area and lesion volume (ΔQ; p ≤ 0.001) of the lesions were found over time in both groups. However, no significant difference was observed between the groups (p = 0.79, 0.98 and 0.88, respectively). There was no statistically significant difference between the odds of ΔQ transition to a stage of regression or arrest compared with progression from baseline to 1 year between the two groups (OR = 1.03, 95% CI 0.31-3.39). The daily application of 10% w/v CPP-ACP paste on a school day for 1 year resulted in no improvement of enamel carious lesion remineralization in the primary upper anterior teeth as assessed by QLF. The lesion improvement was not superior to remineralization from regular toothbrushing with fluoridated toothpaste alone in these children. PMID:26228178

  15. 如何规避前牙美学修复的龈边缘暴露%Considerations of avoiding exposure of gingival margin in anterior teeth aesthetic prosthodontics

    Institute of Scientific and Technical Information of China (English)

    赵克; 魏雅茹

    2011-01-01

    Exposure of gingival margin is frequently observed in anterior teeth aesthetic restoration. How to obtain an expected result is a significant challenge during prosthodontic treatment. The present article discussed gingival bio-type, conditions of periodontal tissue, location of margin of restoration, gingival retraction, and provisional restoration, etc. Which would affect the final aesthetic outcome of anterior teeth restorations. The aim of this article is to figure out how to effectively avoid the exposure of gingival margin in anterior teeth aesthetic restoration, and to improve the finally aesthetic outcome of anterior teeth restoration.%前牙修复后常因修复体龈边缘暴露而影响最终美学效果,如何规避此问题是口腔医生面临的挑战.本文通过牙龈生物型、牙周组织状况、修复体龈边缘位置、排龈技术与排龈线及暂时修复体制作等几个方面,探讨前牙美学修复中如何有效地规避修复体龈边缘暴露,以提高前牙修复的美学效果.

  16. The Role of Mandibular Third Molars on Lower Anterior Teeth Crowding and Relapse after Orthodontic Treatment: A Systematic Review

    OpenAIRE

    2014-01-01

    Aims. To evaluate the role of third molars in the development of crowding or relapse after orthodontic treatment in the anterior segment of the dental arch. Methods. PubMed search of the literature was performed selecting all the articles relevant to the topic and limiting the studies to controlled trials on humans and written in English language. Systematic review was conducted according to the PRISMA (preferred reporting items for systematic reviews and meta-analyses) statement. Results. A ...

  17. Your Teeth

    Science.gov (United States)

    ... Homework? Here's Help White House Lunch Recipes Your Teeth KidsHealth > For Kids > Your Teeth Print A A ... help you talk. So let's talk teeth! Tiny Teeth Unlike your heart or brain, your teeth weren' ...

  18. Evaluation of the Root and Canal Morphology of Mandibular Permanent Anterior Teeth in an Iranian Population by Cone-Beam Computed Tomography

    Directory of Open Access Journals (Sweden)

    Mohsen Aminsobhani

    2013-01-01

    Full Text Available Objective: To evaluate differences in the root and canal configurations of mandibular permanent anterior incisors and canines in an Iranian population by means of Cone Beam CT (CBCT images.Materials and Methods: Four hundred CBCT images of mandibular permanent incisors and canines that met the inclusion criteria were evaluated. Vertucci´s classification was used to evaluate the number of roots, number of root canals, root lengths, root curvatures and canal types.Results: Totally 632 central incisors, 614 lateral incisors and 608 canines were evaluated. The average length of the mandibular central, lateral incisors and canines was 21.3±0.10, 21.9± 0.13 and 25.1± 0.11 mm, respectively. All of the mandibular central and lateral incisors had one root, but the incidence of single-rooted mandibular canines and two-rooted mandibular canines was 96.3% and 4.7%, respectively. The majority of mandibular central, lateral incisors and canines had one canal (72.7%, 70.6% and 71.8%, respectively. Five types of Vertucci canal configurations were seen in the evaluated teeth. Type 1 Vertucci configuration was the most prevalent configuration (72.3%, 70.6% and 71.8% for the central, lateral incisors and canines, respectively, and type 5 Vertucci canal configuration was the least prevalent type seen (3.3%, 3.2% and 2.3% for the central, lateral incisors and canines, respectively. The most frequent root curvatures in these teeth were distally and buccally. No significant difference was seen between male and female patients regarding any of the parameters evaluated in this study (p>0.05.Conclusion: More attention should be given to the detection of additional canals and the recognition of canal curvature in Iranian patients.

  19. Analysis on the features of tooth wear of anterior teeth in 832 adults with the age of 35~54 years old%832名35~54岁成年人前牙磨损特征分析

    Institute of Scientific and Technical Information of China (English)

    王珺; 吉凯

    2013-01-01

    目的:分析当代成年人的前牙磨损特征.方法:以832名35 ~ 54岁成年人为研究对象,评价其前牙磨损指数,并对年龄、性别、有无磨牙症史及饮食习惯等情况进行问卷调查.结果:①前牙重度磨损发生率34.67%;②45 ~54岁年龄组前牙平均磨损指数高于35 ~44岁年龄组(P<0.05);③男性前牙平均磨损指数高于女性(P<0.05);④前牙磨损指数与磨牙症、酗酒关系密切(P<0.05).结论:①前牙磨损具有明显的增龄性效应;②磨牙症、酗酒是本样本人群前牙磨损的重要危险因素.%Objective To investigate the clinical features of tooth wear of anterior teeth in adults.Methods 832 adults with the age of 35~54 years old were involved.The tooth wear index of anterior teeth was analyzed,and data about their age,sex,bruxism and the dietary pattern were collected.Results ①The incidence of severe tooth wear in anterior teeth was 34.67%.②The tooth wear index in 45~54 age group was higher than that in 35~44 age group (P<0.05).③The tooth wear index in male was higher than that in female(P<0.05).④The tooth index of anterior teeth has close relationship with bruxism and excessive drinking.Conclusion ①The tooth wear index of anterior teeth in adults is age-dependent.②Bruxism and excessive drinking are important risk factors for tooth wear of anterior teeth in the present sample.

  20. Clinical and radiographic assessment of mineral trioxide aggregate and calcium hydroxide as apexification agents in traumatized young permanent anterior teeth: A comparative study

    Science.gov (United States)

    Damle, S. G.; Bhattal, Hiteshwar; Damle, Dhanashree; Dhindsa, Abhishek; Loomba, Ashish; Singla, Sumit

    2016-01-01

    Background: To evaluate and compare the efficacy of mineral trioxide aggregate (MTA) and traditionally used calcium hydroxide (Ca(OH)2) in inducing root end formation of immature roots of traumatized young permanent anterior teeth. Materials and Methods: The study was carried out on 22 nonvital, immature permanent maxillary incisors. Samples were allotted into two groups - Group I MTA and Group II Ca(OH)2 Success rate was determined based upon the time duration required for apical barrier formation. The canals were obturated using gutta-percha points in MTA group, after 24 h, whereas in Ca(OH)2 group, obturation was carried out after radiographic confirmation of the apical barrier. The clinical and radiographic evaluation was carried out at a follow-up periods of 3, 6, and 9 months and statistical analysis was carried out by SPSS version 15.0 statistical analysis software (Chi-square test and fisher exact test). Results: In MTA Group, barrier formation was observed in 90.90% of the patients after 9 months whereas in Ca(OH)2 Group, the same was observed in 81.81%. The mean time required for barrier formation in MTA group was 4.90 months and 5.33 months in Ca(OH)2 group. Conclusion: MTA and Ca(OH)2, as medicaments for apexification, were comparable in terms of the evaluation parameters. However, MTA was beneficial in terms of immediate obturation of immature roots with wide open apices. PMID:27274351

  1. Avaliação estética da montagem dos seis dentes superiores anteriores em prótese total Esthetic evaluation of the setting up of the six anterior superior teeth in complete dentures

    Directory of Open Access Journals (Sweden)

    Osmar Vieira de CASTRO Jr.

    2000-06-01

    Full Text Available A presente pesquisa teve por objetivo fazer uma avaliação estética de diferentes tipos de montagens de dentes anteriores superiores na prova em cera de uma prótese total. Sendo o assunto de natureza subjetiva, as próteses foram submetidas à apreciação de um grupo de pessoas entre estudantes, especialistas e leigos. Foram confeccionadas cinco próteses superiores ocluindo com uma única inferior, para cada um dos 10 pacientes do sexo masculino na faixa etária entre 18 e 72 anos. Os dentes anteriores de cada uma das próteses foram montados com um tipo de caracterização: para jovens (clássica, senil, com toque feminino, com toque masculino e com diastemas. As conclusões foram as seguintes: as montagens que mais agradaram foram a para jovens (clássica com 38,57%, seguida da senil com 32,85%, sem diferenças significantes entre elas. As montagens que menos agradaram foram a com toque feminino com 32,86% de desaprovação, seguida da montagem masculina (31,43% e com diastema (22,86%, sem diferenças significantes entre elas.The purpose of this research was to evaluate different ways of setting up teeth in complete dentures, during the try-in phase (before having them processed. Since this issue has a subjective appeal, the prostheses were submitted to the evaluation of different kinds of people. The different groups of evaluators were: students, specialists and laymen.

  2. Clinical study on the control of the anterior teeth movement using different heights of traction hook%不同高度的牵引钩对前牙移动控制的临床研究

    Institute of Scientific and Technical Information of China (English)

    姚宁; 高美琴; 顾永佳; 陆剑锋; 熊斌; 王林

    2015-01-01

    Objective To study the effects of MIA ( mini-implant anchorage ) combined with traction hooks with different heights on the movement of anterior teeth in order to better use the MIA in orthodontic treatment .Methods 24 patients with severe maxillary pro-trusion were randomly divided into experimental group and control group ,each containing 12 patients.The patients were treated with MIA and straight wire appliance by sliding mechanics to retract anterior teeth and narrow the extraction space .2 mm hooks in experi-ment group and 6 mm hooks in control group were used for retraction .Cephalometric radiographs were collected before and after the an-terior teeth retraction and t-test was used to analysis the data .Results 0.31 mm maxillary molar mesial movement was observed in both groups and the anterior teeth were retracted effectively and uprighted .In the experiment group ,anterior teeth were intruded about 1.82mm,while anterior teeth were protruded about 1.05 mm in the control group .Conclusions As the height of traction hook in-creased,the elongation tendency of anterior teeth increased during the retraction process ,and the lingual movement of the maxillary an-terior teeth decreased .In the clinical treatment ,the traction hooks with different heights should be used according to the specific maloc-clusion.%目的:探讨微种植支抗结合不同高度的牵引钩对前牙移动的影响,为更好地利用微种植支抗辅助内收前牙提供临床基础。方法选择上颌严重前突患者24例,随机分为实验组和对照组,每组12例。采用微种植支抗结合直丝弓技术滑动法内收前牙关闭拔牙间隙;实验组采用2 mm长牵引钩,对照组采用6 mm长牵引钩。内收前牙前后拍摄头颅侧位片进行相关指标的测量分析,配对t 检验比较组间差别。结果实验组(2 mm)和对照组(6 mm)拔牙间隙关闭后磨牙均少量前移(0.31 mm),上前牙明显内收且直立,实验组上

  3. 离体下颌前牙唇舌向根管形态的研究%Survey of root canal configuration of mandibular anterior teeth in labiolingual direction

    Institute of Scientific and Technical Information of China (English)

    符大勇; 赵洪贞; 邓婧; 王玲香; 官群立

    2011-01-01

    目的 观察离体下颌前牙唇舌向根管形态及弯曲情况,为掌握正确地开髓方向提供依据.方法 采用间接数字化X线成像技术,对收集的离体105颗下颌前牙进行近远中向拍摄,根据Weine根管分类标准,观察根管类型;采用改良Schneider测量方法,分析根管弯曲情况.沿下颌前牙近远中向X线片根中1/3画延长线,观察延长线在下颌前牙切端的位置.结果 下颌前牙根管在唇舌向半数以上存在弯曲,根尖多数弯向唇侧,弯曲部位多集中在根尖1/3.结论 下颌前牙根管形态较为复杂,弯曲率较高,开髓方向应靠近切缘.%Objective To Investigate the root canal configuration and canal curvature of permanent mandibular anterior teeth in labiolingual direction. Methods A total of 105 anterior teeth were collected and examined by indirect digital X-ray radiography from labiolingual direction. The canal configuration and curvature was analyzed by Weine and Schneider methods. Results Most root canals of mandibular anterior teeth were type I, and more than half were mesialdistally curved. The most curved place was located in the apical third of the canal. Conclusion Root canal configuration of mandibular anterior teeth are relatively complex and have a higher bending rates. The direction of pulp explosure should be close to the incisal edge.

  4. In vivo measurements of daily UV exposure of human anterior teeth using CaF2:Tb,Sm as a thermoluminescence dosimeter

    International Nuclear Information System (INIS)

    Ultraviolet radiation (UV) has been indicated as one of the causes of discoloration of dental materials yet the standard requires that dental polymers be irradiated with light from a xenon lamp, which includes UV, to evaluate their color stability. It is doubtful that dental polymers in the mouth are exposed to large energy of UV on a daily basis, but there have been no reports concerning exposure. In the present study, we used thermoluminescence (TL) from sintered CaF2:Tb,Sm, which is highly sensitive to UV, to measure the daily energy of UV exposure to the labial surface of the maxillary anterior teeth, which are regarded as receiving the maximum exposure among oral tissues. We produced disks of CaF2 co-doped with Tb4O7 and Sm2O3 (sintered CaF2:Tb,Sm) that were 5 mm in diameter and 1 mm thick, and placed them inside glass cases that had a 7-mm external diameter, 3-mm height, and 1-mm thickness of glass made of synthetic silica with ≥90% UV transmittance. These glass cases were fixed in dental mouthpieces in a position corresponding to the central maxillary incisors. These mouthpieces were worn by 11 subjects and UV measurements were carried out over a 24-h period in a uniform environment. The results of these TL measurements showed a TL glow peak in the region of 430 K. This was the same as that seen with irradiation from a xenon lamp as basic illumination. The daily UV radiant energy was 72.2 mJ/cm2 (32.7-143.8 mJ/cm2), calculated from the relationship between TL intensity and UV radiant energy. This corresponded to 0.02% of the UV radiant energy contained in the light irradiation specified by ISO 4049.

  5. In vivo measurements of daily UV exposure of human anterior teeth using CaF{sub 2}:Tb,Sm as a thermoluminescence dosimeter

    Energy Technology Data Exchange (ETDEWEB)

    Saito, W., E-mail: saito-wataru@tsurumi-u.ac.j [Department of Operative Dentistry, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama (Japan); Ikejima, I. [Department of Operative Dentistry, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama (Japan); Fukuda, Y. [Department of Urban Environment, Faculty of Human Environment, Osaka Sangyo University, 3-1-1, Nakagaito, Daito, Osaka (Japan); Momoi, Y. [Department of Operative Dentistry, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama (Japan)

    2011-03-15

    Ultraviolet radiation (UV) has been indicated as one of the causes of discoloration of dental materials yet the standard requires that dental polymers be irradiated with light from a xenon lamp, which includes UV, to evaluate their color stability. It is doubtful that dental polymers in the mouth are exposed to large energy of UV on a daily basis, but there have been no reports concerning exposure. In the present study, we used thermoluminescence (TL) from sintered CaF{sub 2}:Tb,Sm, which is highly sensitive to UV, to measure the daily energy of UV exposure to the labial surface of the maxillary anterior teeth, which are regarded as receiving the maximum exposure among oral tissues. We produced disks of CaF{sub 2} co-doped with Tb{sub 4}O{sub 7} and Sm{sub 2}O{sub 3} (sintered CaF{sub 2}:Tb,Sm) that were 5 mm in diameter and 1 mm thick, and placed them inside glass cases that had a 7-mm external diameter, 3-mm height, and 1-mm thickness of glass made of synthetic silica with {>=}90% UV transmittance. These glass cases were fixed in dental mouthpieces in a position corresponding to the central maxillary incisors. These mouthpieces were worn by 11 subjects and UV measurements were carried out over a 24-h period in a uniform environment. The results of these TL measurements showed a TL glow peak in the region of 430 K. This was the same as that seen with irradiation from a xenon lamp as basic illumination. The daily UV radiant energy was 72.2 mJ/cm{sup 2} (32.7-143.8 mJ/cm{sup 2}), calculated from the relationship between TL intensity and UV radiant energy. This corresponded to 0.02% of the UV radiant energy contained in the light irradiation specified by ISO 4049.

  6. 前牙压低技术在深覆(牙合)患者矫治中的应用进展%Progress of anterior teeth intrusion in deep overbite treatment

    Institute of Scientific and Technical Information of China (English)

    陆史俊

    2011-01-01

    深覆(牙合)的治疗是口腔正畸矫治的难点之一.对于伴有垂直生长型、长面型或上唇过短、露龈笑的患者,就更需要医生进行细致诊断,合理选择矫治方法和器械.通过单纯地压低前牙能较为有效地治疗该类患者的深覆(牙合)畸形.目前,临床常用的压低前牙的方法主要有三段式片段弓技术、多用途弓技术、J钩联合高位牵引技术和微种植支抗技术等.本文就常见的前牙压低技术的方法、生物力学机制、临床疗效评价及其对周围软硬组织的影响等方面作一综述,希望为临床使用提供参考.%Deep overbite correction is one of the difficulties in orthodontic treatment. If a patient is a vertical growth patter associated with long face or gummy smile, that need doctor to diagnosis carefully and chose a reasonable methods and equipment. Anterior teeth intrusion can treat such patients with deep overbite more effectively. There are some intrusive technologies such as: 3-pieces segment arch, utility arch, J-hook, mini-implant, and so on. The aim of this article was to review the intrusion technology, biomechanical mechanisms, clinical treatment evaluation and their impact on surrounding tissues.

  7. Determining utility values in patients with anterior cruciate ligament tears using clinical scoring systems

    Directory of Open Access Journals (Sweden)

    Szucs Thomas

    2011-08-01

    Full Text Available Abstract Background Several instruments and clinical scoring systems have been established to evaluate patients with ligamentous knee injuries. A comparison of individual articles in the literature is challenging, not only because of heterogeneity in methodology, but also due to the variety of the scoring systems used to document clinical outcomes. There is limited information about the correlation between used scores and quality of life with no information being available on the impact of each score on the utility values. The aim of this study was to compare the most commonly used scores for evaluating patients with anterior cruciate ligament (ACL injuries, and to establish corresponding utility values. These values will be used for the interpretation and comparison of outcome results in the currently available literature for different treatment options. Methods Four hypothetical vignettes were defined, based on different levels of activities after rupture of the ACL to simulate typical situations seen in daily practice. A questionnaire, including the Health Utility Index (HUI for utility values, the IKDC subjective score, the Lysholm and the Tegner score, was created and 25 orthopedic surgeons were asked to fill the questionnaire for each hypothetical patient as proxies for all patients they had treated and who would fit in that hypothetical vignette. Results The utility value as an indicator for quality of life increased with the level of activity. Having discomforts already during normal activities of daily living was rated with a mean utility value of 0.37 ± 0.19, half of that of a situation where mild sport activity was possible without discomfort (0.78 ± 0.11. All investigated scores were able to distinguish clearly (p Conclusions Here we report the correlation between the most commonly used scores for the assessment of patients with a ruptured ACL and utility values as an indicator of quality of life. Assumptions were based on expert

  8. 半脱位恒前牙两种固定方式的对比研究%A comparative study on two fixation methods of permanent anterior teeth

    Institute of Scientific and Technical Information of China (English)

    杨丽荣; 柯正健; 邹小贤

    2013-01-01

    目的:对比研究钢丝-树脂夹板固定与牙弓夹板固定在半脱位恒前牙固定方式的临床效果.方法:收集2008 ~ 2012年就诊于我院的132例牙外伤患者的152颗半脱位恒前牙完整病例资料,进行回顾性研究,并进行统计学分析.结果:152颗半脱位恒前牙中有钢丝-树脂夹板固定93颗,牙弓夹板固定59颗,两种固定方法成功率分别为95.69%和88.13%,钢丝-树脂夹板固定技术在控制牙外形、牙弓形态、远期效果上优于牙弓夹板技术,差异有统计学意义(P<0.05).结论:两种方法在半脱位恒前牙固定中均疗效肯定,但钢丝-树脂夹板固定技术应其预后效果良好,更宜在临床推广.%Objective: To study the clinical effect of ultrastrength textile fiber in the fixation of dislocated tooth. Methods Collecting material of 152 subluxation of permanent anterior teeth from 132 patients with dental trauma during year 2008 to 2012. A retrospective study was carried out, and statistical analysis. Results 93 teeth used steel wire resin splint fixation in 152 permanent anterior teeth, 59 teeth were dental arch splint, the success rate of two different fixation methods were 95.69% and 88.13%, steel wire resin splint fixation technology in the control of dental arch form, shape, long-term effect is better than that of dental arch splint technique, the difference was statistically significant (P< 0.05). Conclusion Two kinds of treatments of Subluxation of permanent anterior teeth fix are effective, but Steel wire resin splint fixation technique attended with good results,suitable for clinical application.

  9. Clinical evaluation of IPS e.max Press ceramic endocrowns in individual maxillary anterior teeth malposition%铸瓷髓腔固位冠修复个别上前牙错位的疗效观察

    Institute of Scientific and Technical Information of China (English)

    李雪铃; 杨凌; 朱文军; 林雪峰

    2015-01-01

    Objective The present study aimed to evaluate the clinical effects of IPS e.max Press ceramic endocrowns applied in individual maxillary anterior teeth malposition. Methods Fifteen malposed maxillary anterior teeth were selected from fifteen patients in this study. All the malposed teeth had been endodontically treated and performed with ultrasonic scaling. After 1-2 weeks, the IPS e.max Press ceramic endocrowns were fabricated and cemented with resin cement. The color, shape, margin fitness, preservation of the restorations and the gingival health of the abutments were reviewed after 6 months and 12 months respectively. Results The margins of all restorations were well sealed; the colorsand shapes of the restorations were satisfied and matched with the natural teeth; and the periodontal tissues of the abutments were healthy. Except for one case with displacement of the abutment, the remaining endocrowns were functioning well without loosening. The preservation rate of the restorations was 100%(15/15), and the clinically acceptable rate was 93.3%(14/15). Conclusions Application of IPS e.max Press ceramic endocrowns in repairing individual maxillary anterior teeth malposition could obtain satisfied effects.%目的:探讨IPS e.max Press铸瓷髓腔固位冠在个别上前牙错位修复中的临床疗效。方法选择15例个别上前牙错位的患者,经完善根管治疗和(或)牙周治疗,1~2周后制作IPS e.max Press铸瓷髓腔固位冠,树脂粘接剂粘固。并于6个月、1年后复查修复体的颜色、形态、边缘密合性、牙龈健康情况、基牙及修复体的保存情况。结果1年内所有修复体边缘密合、牙龈健康、颜色美观;除1例基牙移位外,其余髓腔固位冠无松动移位。保存率100%(15/15),临床可接受率为93.3%(14/15)。结论 IPS e.max Press铸瓷髓腔固位冠用于个别上前牙错位的修复可取得良好的效果。

  10. Imaging study of root canal apical morphology of mandibular anterior teeth%下颌前牙根管根尖部形态的影像学研究

    Institute of Scientific and Technical Information of China (English)

    张文; 彭彬

    2013-01-01

    Objective To investigate the root canal diameters,cross-section morphology and tapers of the root canal apical part of human mandibular anterior teeth.Methods A total of 481 mandibular anterior teeth were examined by Digora indirect digital radiography both from buccolingual and mesiodistal directions.Root canal types,root canal apical part diameters,cross-section morphology and tapers were analyzed.Results The major sort of mandibular anterior teeth was type Ⅰ,while 25.46% mandibular incisors and 13.21% mandibular canines were type Ⅱ,Ⅲ and Ⅳ root canals.In the type Ⅰ root canals,buccolingual diameters (median) were larger than mesiodistal diameters (median),and the buccolingual diameter (median) at 1 mm from apex was 0.32 mm.In the mandibular anterior teeth,buccolingual tapers were larger than mesiodistal tapers,and the buccolingual tapers (median)were more than 0.10.Conclusions Mandibular anteriors' root canal apical morphology is quite complicated.To archive perfect clinical treatment effect of mandible anterior teeth,the master point file should select at least 35# root canal files cooperated with root canal irrigation,modified root canal preparation technique and strengthen disinfection technique.%目的 探讨下颌前牙根管根尖部的内径、横截面形态和锥度.方法 采用Digora间接数字化成像技术拍摄481颗下颌前牙的近远中向和颊舌向X线影像,分析根管的分型、根管根尖部内径、横截面形态和锥度.结果 下颌前牙以Ⅰ型根管为主,但仍有25.46%的下颌切牙和13.21%的下颌尖牙出现Ⅱ、Ⅲ和Ⅳ型根管.在Ⅰ型根管中,颊舌径(中间值)大于近远中径(中间值),且下颌切牙和尖牙距根尖1 mm处颊舌径的中间值为0.32 mm;下颌前牙颊舌向锥度大于近远中向锥度,颊舌向锥度的中间值大于0.10.结论 下颌前牙的根管根尖部形态较为复杂.预备单根管下颌前牙时主尖锉应选用至少35#的根管锉,并配合根管

  11. 铸瓷贴面在前牙美容修复中的临床效果观察%Observation on the effect of ceramic faced in the repair of anterior teeth beauty

    Institute of Scientific and Technical Information of China (English)

    陈艳青

    2013-01-01

    Objective To study the clinical effect of ceramic cover anterior on teeth beauty.Methods 138 teeth in 34 patients with dental fluorosis were divided into two groups,the control group (69 teeth in 16 patients) was given traditional PFM cover repair,the treatment group (69 teeth in 18 patients) was given ceramic cover,they were followed up for three years.The teeth remaining rate and patient satisfaction were compared,the match color,edge fit,healthy gums,restoration integrity were compared according to the Ryge standard.Results Teeth remaining rate in treatment group was 95.7%,which was significantly higher than control group (P < 0.05).The patient satisfaction was 94.4% in treatment group and 87.5% in the control group,the difference was significant (P < 0.05).The match color,edge coloring,healthy gums and teeth sensitivity were not different between the two groups (P > 0.05).The restoration integrity and marginal fit of treatment group was better than control group (P < 0.05).Conclusion The clinical effect of ceramic faced in the anterior teeth beauty repair,especially in the repair of dental fluorosis is remarkable,and the remaining teeth rate higher,repair,dental restoration integrity and marginal fit is significantly better than that of resin repair,patient satisfaction is higher,the water area from non-beryl popularization and application.%目的 研究铸瓷贴面在前牙美容修复中的临床效果.方法 将34例(138牙)氟斑牙患者随机分为两组,对照组16例(69牙)采用传统烤瓷贴面修复,治疗组18例(69牙)采用铸瓷贴面技术进行修复,随访3年,记录并比较两组患者的牙齿存留率及患者满意度,并采用改良Ryge标准对两组患者牙齿的颜色匹配、边缘密合度、牙龈健康、修复体完整度等指标进行评价.结果 3年后治疗组患者牙齿存留率为95.7%,明显高于对照组的89.9%,差异有统计学意义(P<0.05);治疗组患者满意度为94.4%,对照组为87

  12. 微种植体支抗压低前牙的临床与基础研究%The clinical and basic research of mini -implant anchorage for the anterior teeth intrusion

    Institute of Scientific and Technical Information of China (English)

    王亚楠; 杨四维

    2013-01-01

    The traditional methods are often not effective in intruding the anterior teeth, opening the bite and improv-ing the gummy smile during the orthodontic treatment. Mini-implant anchorage as an absolute anchorage can be im-planted into any part of the jaw. It can apply the absolute intrusion and also can produce a good clinical treatment effect. The aim of this article was to review the clinical and basic research of mini-implant anchorage for the anteri-or teeth intrusion.%  正畸临床矫治中在压低前牙,打开咬合,改善露龈笑时,传统方法对前牙施行绝对压低的效果往往不理想。微种植体支抗作为一种绝对支抗可植入颌骨任何部位,对前牙实施绝对的压低,产生良好的临床矫治效果。本文对微种植体支抗压低前牙的临床与基础研究作一综述。

  13. Curative effect of deciduous anterior teeth crossbite treated with fixed appliance%正畸固定矫治器矫治乳前牙反�的疗效观察

    Institute of Scientific and Technical Information of China (English)

    卢仕英; 谭桂萍; 黄敏方

    2014-01-01

    Objective To explore the curative effect of deciduous anterior teeth crossbite treated with fixed appliance.Methods The curative effect of fixed appliance on deciduous anterior teeth crossbite in 15 children trea-ted in orthodontics department of People′s Hospital of Guangxi Zhuang Autonomous Region from 2011 to 2014 were analyzed.Results The longest curative course for crossbite to be quitted in 15 children was 2 months,the shortest was 3 weeks.Average total treatment course was (4 ±0.5)months.Deciduous anterior tooth overjet and overbite were normal after treatment .The curative effect of 13 children were stable following 2 years after treatment ,and just 2 pa-tients who had hereditary skeletal crossbite family history had a relapse .Conclusion Treatment for deciduous anteri-or teeth crossbite with fixed appliance need little cooperation from the child ,diminish child′s times of return visit ,can quit crossbite smoothly ,and was effective highly .%目的:探讨固定矫治器治疗乳前牙反�的疗效。方法对2011-01~2014-03在广西壮族自治区人民医院口腔正畸科自愿选择固定矫治器进行矫治的15例错�畸形病例的治疗效果进行分析。结果15例患者最长反�解除时间2个月,最短3周,平均疗程(4±0.5)个月。矫治后前牙覆�(牙�)覆盖关系正常,追踪2年,13例牙性及功能性反�疗效稳定,无复发。2例有骨性反�遗传史,反�复发。结论固定矫治器治疗乳前牙反�能够减少患儿的不配合及就诊次数,并顺利地解除乳前牙反�,是一种治疗乳前牙反�的高效矫治器。

  14. Effect of occlusal adjustment on the mobility of anterior teeth with different attachment levels%咬合力调整对不同附着水平前牙动度的影响

    Institute of Scientific and Technical Information of China (English)

    张志媛; 辛海涛; 寇亚莎; 赵艳芳; 吴玉禄

    2013-01-01

    AIM: To investigate the effect of occlusal adjustment (OA) on the mobility and periodontium remodeling of anterior teeth with clinical attachment loss ( CAL). METHODS:197 anterior teeth with CAL in 26 patients were divided into 3 groups according to the degree of CAL: 0~2 mm (n = 66) , 2~4 mm ( n = 67) and 4~6 mm ( n = 64). The teeth with excessive bite force was detected and received occlusal adjustment by T-Scan Ⅲ digital occlusal system. The mobility was recorded once a month using a laser displacement sensor from the beginning of the test to the end of the third month. A repeated measurement analysis of the variance was performed to analyze the effect of OA on teeth mobility and periodontium remodeling. RESULTS: There was a significant decrease (P 0. 05 ) when the CAL exceed 4mm. CONCLUSION: OA can reduce the mobility of anterior teeth with CAL less than 4mm, and can improve the periodontium remodeling of these teeth, when the CAL is more than 4mm the effects may not be significant.%目的:对存在牙周附着丧失并伴有咬合力过大的前牙进行咬合调整,分析咬合力降低对牙周附着丧失前牙的动度和牙周组织改建的影响.方法:选取26名患者197个存在牙周附着丧失且伴有咬合力过大的前牙,根据牙周附着丧失水平的不同分为3组:0~2mm组(66个牙)、2~4 mm组(67个牙)、4~6 mm组(64个牙).采用T-ScanⅢ数字咬合测试系统对不同附着水平前牙的咬合力进行测量,对咬合力过大的前牙给予咬合调整治疗.运用激光位移测试仪测量咬合调整后3个月内的牙齿动度,采用重复测量方差分析来研究咬合调整对不同附着丧失前牙动度的影响.结果:咬合调整后3个月内牙周附着丧失≤4 mm的前牙动度明显下降(P<0.05).附着丧失>4 mm的牙齿动度较未调(牙合)组无统计学差异(P>0.05).结论:咬合力调整能明显降低附着丧失≤4 mm的前牙动度,促进其牙周组织的改建.对于附着丧

  15. ESTHETICS IN PRIMARY TEETH

    Directory of Open Access Journals (Sweden)

    Mathew Renu Ann

    2013-08-01

    Full Text Available Dental esthetics is an integral part of facial esthetics. Esthetic problems in childhood and adolescence can have a significant effect on psychosocial development and interaction with peers. Esthetic restoration of primary anterior teeth can be especially challenging due to the small size of the teeth, close proximity of pulp to tooth surface, relatively thin enamel and surface area for bonding, issues related to child behavior and finally cost of the treatment. The advent of different techniques, devices, and materials helps in creating beautiful restorations which help children and adolescents improve their self-image.

  16. Perawatan Ortodontik Gigi Anterior Berjejal dengan Tulang Alveolar yang Tipis

    Directory of Open Access Journals (Sweden)

    Miesje K. Purwanegara

    2015-09-01

    Full Text Available Anterior teeth movement in orthodontic treatment is limited to labiolingual direction by very thin alveolar bone. An uncontrolled anterior tooth movement to labiolingual direction can cause alveolar bone perforation at its root segment. This case report is to remind us that alveolar bone thickness limits orthodontc tooth movement. A case of crowded anterior teeth with thin alveolar bone in malocclusion I is reported. This case is treated using adgewise orthodontic appliance. Protraction of anterior teeth is anticipated due to thin alveolar bone on the anterior surface. The conclusion is although the alveolar bone surrounding the crowded anterior teeth is thin, by controlling the movement the teeth reposition is allowed.

  17. Development of an epidemiological index for primary anterior teeth affected by erosion and prevalence of dental erosion in pre-school Saudi children

    OpenAIRE

    Al-Malik, M.

    2000-01-01

    Erosion affects both dentitions but has proved difficult to measure. It has been thought to affect children who are less susceptible to caries but previous studies have been confined to countries where caries prevalence is low. The aims of this study were first, to develop and then investigate the validity of an index to measure erosion in primary teeth. Secondly, to determine the prevalence of erosion in primary incisors amongst kindergarten children in Jeddah and its relat...

  18. 上颌天然牙列与全口义齿前牙排列位置的测量分析%The Measurement and Analysis on the Arranging of Maxillary Anterior Teeth of Dentulous and Edentulous Jaws

    Institute of Scientific and Technical Information of China (English)

    杜斌; 白乐康; 李峥

    2014-01-01

    Objective :To evaluate the relationship between the incisive papilla and maxillary anterior teeth of dentulous and edentulous jaws ,in order to give some clinical guidance for teeth arrangement of complete denture .Methods :Selec-ting 60 adult maxillary dentulous casts with normal occlusion ,and 57 upper complete denture models of edentulous pa-tients repaired in our stomatological hospital .The relationship between incisive papilla and maxillary anterior teeth were measured ,including the distance between incisor and papilla (IEP) ,intercanine line and papilla (Dip-c ) .All data were input into SPSS14 .0 system and were analyzed with statistic analysis between different groups and sex .Results:In the dentulous group ,the average IEP distance was (8 .96 ± 1 .24)mm and the average Dip-cdistance was (-0 .20 ± 1.12) mm .In the edentulous group ,The average IEP distance was (6 .33 ± 2 .02)mm and the average Dip-c distance was (2.19 ± 1 .31)mm .No difference was found for different sex in each group (P>0 .05) .The distances between the two groups had significant differences (P<0 .05) .Conclusion:The relationship between incisive papilla and maxillary anterior teeth was constant in the dentulous group .But these values are less for artificial teeth than natural dentitions .%目的:调研上颌全口义齿前牙排列位置的现状,以指导临床工作。方法:为60例天然牙列人群及57例上颌总义齿患者制取上颌牙列模型,各组按性别分别测量切牙乳突中点到1|1唇面距离(IEP)、到3|3牙尖连线距离(Dip-c ),并将测量结果用SPSS14.0软件统计分析。结果:60例天然牙列测量结果:IEP为(8.96±1.24)mm ,Dip-c为(-0.20±1.12)mm ;57例上颌全口义齿测量结果:IEP为(6.33±2.02)mm ,Dip-c为(2.19±1.31)mm ,两组内所测数据无性别间差异,但两组间存在显著差异。结论:天然牙列中上颌前牙与切牙乳突存在较恒定的

  19. Color Analysis of Maxillary Anterior Teeth of Uygur Youth in Urumqi.%乌鲁木齐市维吾尔族青年上前牙色度值的研究

    Institute of Scientific and Technical Information of China (English)

    王瑞文; 王锋; 崔杰; 何惠宇

    2011-01-01

    Objective: To study the color of Uygur youth's anterior teeth. Methods: Maxillary anterior teeth of 18-25 years' old Uygur youth were included. Color analysis system of digital camera and computer was used to measure the color of maxillary anterior teeth. Results: The L values of cervical, middle and incisal parts of uygur youngth's upper center incisors were 73.27±6.43, 75. 51±5.59, 66. 92±5.58. Those of the upper lateral incisors were 67.06±7.50, 68.43±8.38, 62.11±6.99. Those for the upper canines were 59.62±11.60, 60.40±9.10、55.11±8.73. Conclusion: In Urumqi, 18-25 year-old uygur youth presented the color distributing of maxillary anterior form upper central incisor to cuspid, L values change from high to low, and a, b values from low to high. The color in different areas of teeth were different: in middle 1/3, L values were the highest, but a and b values were the lowest; the L, a and b values in cervical 1/3 were higher than those in incisal 1/3.%目的:研究乌鲁木齐市维吾尔族青年上前牙天然牙的色度值,为临床制作仿真修复体提供参考.方法:采用数码相机及计算机色度分析系统采集、分析852颗18~25岁乌鲁木齐市维吾尔族青年上前牙天然牙的色度值.结果:维吾尔族青年的上颌中切牙颈、中、切的L值分别为73.27±6.43、75.51±5.59、66.92士5.58,侧切牙颈、中、切的L值分别为67.06±7.50、68.43±8.38、62.11±6.99,尖牙颈、中、切的L值分别为59.62±11.60、60.40±9.10、55.11±8.73.结论:乌鲁木齐市18~25岁维吾尔族青年的上前牙色度值从中切牙向尖牙方向均呈现明度逐渐降低,彩度逐渐增大;各个牙位的不同部位牙面的色度值也有变化,其中中1/3的明度值最大、彩度值最小,颈1/3的明度值和彩度值均高于切1/3.

  20. Clinical utility of anterior segment swept-source optical coherence tomography in glaucoma

    Directory of Open Access Journals (Sweden)

    Dewang Angmo

    2016-01-01

    Full Text Available Optical coherence tomography (OCT, a noninvasive imaging modality that uses low-coherence light to obtain a high-resolution cross-section of biological structures, has evolved dramatically over the years. The Swept-source OCT (SS-OCT makes use of a single detector with a rapidly tunable laser as a light source. The Casia SS-1000 OCT is a Fourier-domain, SS-OCT designed specifically for imaging the anterior segment. This system achieves high resolution imaging of 10΅m (Axial and 30΅m (Transverse and high speed scanning of 30,000 A-scans per second. With a substantial improvement in scan speed, the anterior chamber angles can be imaged 360 degrees in 128 cross sections (each with 512 A-scans in about 2.4 seconds. We summarize the clinical applications of anterior segment SS-OCT in Glaucoma. Literature search: We searched PubMed and included Medline using the phrases anterior segment optical coherence tomography in ophthalmology, swept-source OCT, use of AS-OCT in glaucoma, use of swept-source AS-OCT in glaucoma, quantitative assessment of angle, filtering bleb in AS-OCT, comparison of AS-OCT with gonioscopy and comparison of AS-OCT with UBM. Search was made for articles dating 1990 to August 2015.

  1. The prevalence of traumatic dental injuries to permanent anterior teeth and its relation with predisposing risk factors among 8-13 years school children of Vadodara city: An epidemiological study

    Directory of Open Access Journals (Sweden)

    M C Patel

    2012-01-01

    Full Text Available Background and objective: dental trauma is an irreversible pathology that after occurrence is characterized by life-long debilitating effects. The objectives of this study were to measure the prevalence of anterior teeth fracture and their association with predisposing factors such as lip coverage, molar relationship, overjet, and variables such as age, sex, cause, and place of trauma. Materials and Methods: an epidemiological cross-sectional study was carried out among 3708 school children aged 8-13 years in the Vadodara city. All children completed a questionnaire related to history of trauma to their anterior teeth after which they were examined for lip competence, Angle′s molar relationship amount of overjet and nature of trauma sustained. The results were statistically analyzed using the prevalence test, Chi-square test, and Mantel-Haenszel Common Odds Ratio. Results: the prevalence of traumatic injuries was 8.79% and the ratio of boys: girl′s was 1.28:1. Inadequate lip coverage group sustained about five times more injuries than the adequate lip coverage group (P = 0.000, OR= 5.407. The maximum traumatic injuries were seen in children having Angle Class II Div 1 molar relationship and/or overjet greater than 5.5 mm and was statistically significant (P<0.05. Maximum number of injuries occurred at 9 years of age. The most predominant injuries were enamel fractures, the most common place for occurrence was home and fall against object, the most frequent cause. Conclusion: the prevalence of dental injuries in the Vadodara city is high and it has a great potential to be considered as an emerging public health problem.

  2. Malocclusion of teeth

    Science.gov (United States)

    Crowded teeth; Misaligned teeth; Crossbite; Overbite; Underbite; Open bite ... Occlusion refers to the alignment of teeth and the way that the upper and lower teeth fit together (bite). The upper teeth should fit slightly over the lower teeth. ...

  3. 对正常(牙合)者上颌前牙相互间牙冠宽度比例的计算机图像测量分析%Digital Image Measurement and Analysis of Crown Width Ratio between Maxillary Anterior Teeth in Population of Normal Occlusion

    Institute of Scientific and Technical Information of China (English)

    陈润; 杨舟; 吴千驹; 张小宾; 林淑娇; 叶燕惠

    2012-01-01

    Objective To provide clinical guidance for aesthetic restoration design of anterior teeth by analyzing crown width ratio between maxillary anterior teeth. Methods 96 young people meeting inclusion criteria were selected in this study. Front images of all maxillary anterior teeth in these people were taken by a digital camera and 13 final photos were chosen by Delphi technique. The width of maxillary anterior teeth in those photos was measured digitally and the -width ratio bet-ween maxillary anterior teeth was analyzed simultaneously. Results There was significant difference between golden section proportion and width ratio which was calculated by lateral incisor/ central incisor(t = 11. 959, P<0. 01). So was the result bet-ween golden section proportion and width ration which was acquired by canine/lateral incisor. The difference also existed between RED and width ratio mentioned above. Conclusion Golden section proportion and RED were not found in crown width ratio between maxillary anterior teeth of young people possessing normal occlusion in this study. However, the width ratio of maxillary anterior teeth presented an interval centralized tendency.%目的 通过对上颌前牙相互间牙冠宽度比例的研究,为临床前牙美学修复设计提供指导.方法 按纳入标准筛选正常(牙合)青年96人,分别拍摄上颌前牙正面相,并通过德尔菲法评选得到最终13幅照片,测量计算机图像上颌前牙宽度,分析上颌前牙相互间牙冠宽度的比例关系.结果 上颌侧切牙与中切牙以及上颌尖牙与侧切牙相互间的宽度比例关系与黄金分割比例关系差别具有统计学意义;上颌侧切牙与中切牙以及上颌尖牙与侧切牙相互间的宽度比例关系与RED比例关系差别具有统计学意义.结论 正常(牙合)青年上颌前牙相互间牙冠宽度未发现黄金分割比例关系及RED比例,但其比例系数有区间集中的趋势.

  4. Shape analysis of healthy gingival curve in maxillary anterior teeth in 120 Chinese youth%120例中国青年健康上前牙牙龈曲线形状特征分析

    Institute of Scientific and Technical Information of China (English)

    张豪; 乐迪; 胡文杰; 曹占强; 张艳玲

    2013-01-01

    目的:以数学上曲线分析的拐点定义为特征点,对上前牙健康牙龈的曲线特征进行分析,建立龈缘高点、牙龈曲线特征点(拐点)、接触点之间的位置关系,以获取个性化的牙龈曲线特征,为前牙修复体的接触点位置设计提供参考依据,为修复后恢复自然形态的龈乳头创造条件.方法:对120名中国青年健康上前牙的牙龈曲线进行以标准化数码图片为基础的二维牙龈曲线形态分析,测量各种形态特征值及确定牙龈曲线特征点(拐点)与龈缘高点、接触点之间的位置关系.结果:在上颌前牙区,中切牙、侧切牙、尖牙近中牙龈乳头高度平均值依次为(4.49±0.86) mm、(3.64±0.77) mm和(4.12±0.92) mm;远中牙龈乳头高度平均值依次为(4.09 ±0.72) mm、(3.48±0.83) mm和(4.13±0.94) mm.在上颌前牙区,中切牙牙龈曲线的近中拐点的横纵向比例为0.61±0.10和0.26±0.07,远中拐点的横纵向比例为0.57±0.10和0.25±0.07;侧切牙牙龈曲线的近中拐点的横纵向比例为0.50±0.10和0.23 ±0.08,远中拐点的横纵向比例为0.26±0.08和0.56 ±0.11;尖牙牙龈曲线的近中拐点的横纵向比例为0.52±0.09和0.23 ±0.07,远中拐点的横纵向比例为0.60 ±0.12和0.26 ±0.08.结论:上前牙不同牙位的龈乳头形状和牙龈曲线分布有一定的规律,上前牙各个牙位近远中牙龈曲线的特征点(拐点)位置和牙龈缘高点、接触点之间存在数量关系.%To establish the relationship of the gingival crest, the gingival curve characteristic point (inflection point, IP) and the contact points and to use it as reference to design the location of contact area in anterior teeth restoration to form the natural papillae. Methods; Two-dimensional gingival curve morphology analysis based on standardized digital images was done to measure the value of different points in the upper anterior teeth for 120 young Chinese. Results; In the maxillary anterior teeth, the

  5. Z350纳米树脂在前牙美容修复中的临床效果观察%Clinical effects of Z350 nano resin in the anterior teeth beauty and repair

    Institute of Scientific and Technical Information of China (English)

    唐碧茹; 马慕兰

    2016-01-01

    目的:探讨Z350纳米树脂在前牙美容修复中的临床效果。方法收集2014年1月~2015年5月期间我院收治的共150例患者(150颗)牙进行美容修复治疗,按照随机数字表法分为观察组和和对照组,观察组共75例75颗牙,用Z350纳米树脂进行前牙美容修复,对照组共75例75颗牙,用光固化树脂材料对牙齿进行美容修复。比较两组临床疗效、满意度。结果与对照组比较,观察组优良率明显较高,两组差异有统计学意义(P<0.05)。与对照组比较,观察组在色泽修复、外形美观、面容改善及心理状况改善等方面的满意度评分均明显较高,两组差异有统计学意义(P<0.05)。结论 Z350纳米树脂进行前牙美容修复效果较好,患者满意度高,更易于接受,可在临床推广应用。%Objective To investigate the clinical effect of Z350 nano resin in the anterior teeth beauty and repair. Methods 150 patients(150 teeth)for cosmetic dental restorative were collected from January 2014 to May 2015 in our hospital,according to a random number table,all the patients were divided into the observation group and the control group,a total of 75 cases(75 teeth)in the the observation group and all of them were treated with resin Z350 nano Anterior Tooth,a total of 75 cases(75 teeth)in the control group and all of them were treated with photo-curable resin material for cosmetic dental restoration.The clinical efficacy,satisfaction of two groups were compared. Results The Excellent rate of the observation group was significantly higher compared with control group,the difference was statistically significant(P < 0.05).The color restoration,appearance,face to improve and improve mental condition and other aspects of satisfaction scores of the observation group were significantly higher compared with the control group,the difference was statistically significant(P < 0.05). Conclusion The clinical effect of Z350

  6. Multidisciplinary management of impacted central incisors due to supernumerary teeth and an associated dentigerous cyst

    OpenAIRE

    2011-01-01

    Supernumerary teeth are the most common developmental dental anomaly resulting from hyperactivity of dental lamina, dichotomy, environmental factor, or polygenetic process of atavism. Supernumerary teeth present classical oral complication such as impaction of adjacent teeth, crowding, diastema formation, rotation, displacement of teeth, and occlusal interference. A dentigerous cyst associated with anterior supernumerary teeth (mesiodens) is rare and accounts for 5% of all dentigerous cysts. ...

  7. 氟保护漆Duraphat治疗前牙初期龋损的临床效果%Evaluation of the therapeutic effect of fluoride varnish Duraphat for incipient carious lesions in permanent anterior teeth

    Institute of Scientific and Technical Information of China (English)

    辛蔚妮; 许青峰

    2014-01-01

    Objective To assess the therapeutic effect of fluoride varnish Duraphat on the performance of incipient carious lesions white spot lesions (WSL) in anterior teeth in vivo. Methods The sample included 120 children aged 7 to 13 years old , with a total of 146 active WSL in permanent anterior teeth. The children were randomly divided into 3 groups, according to the treatment received:Group A (fluoride varnish Duraphat+oral health instrument, n=52), Group B (oral health instrument, n=47) and Group C (control, n=47). Maximum WSL dimensions (mesiodistal and incisogingival) were measured in millimeters by a previously calibrated single examiner using a periodontal probe . The oral hygiene was assessed by the plaque index . Results Wilcoxon test revealed a statistically significant difference (χ2=29.1,P<0.001) between the initial size and final size in A group (1.53 vs. 0.88) and B group (1.56 vs. 1.47). Pearson′s chi-square test revealed statistically significant differences (χ2=42.5, P<0.001) in the caries activity of the WSL among three groups. Conclusions The fluoride varnish Duraphat is effective to the incipient carious lesions in permanent anterior teeth .%目的:探讨氟保护漆Duraphat对前牙初期龋损白垩色斑块的治疗效果。方法共纳入并分析120例患者146个前牙唇侧白垩斑病损,分为三组:A组(涂氟保护漆Duraphat+口腔健康教育组,n=52),B组(口腔健康教育组,n=47)和C组(对照组,n=47)。由同一位已经过培训的医生采用牙周探针对白垩斑的直径及龋活动性进行评估,同时对研究对象的口腔卫生采用改良菌斑指数进行评估。结果 A组在接受2年的涂氟治疗后其白垩斑直径明显缩小,与另外两组差异有统计学意义(χ2=29.1,P<0.001),初期龋损白垩色斑块活动性龋的比例明显下降(χ2=42.5,P<0.001)。结论氟保护漆Duraphat能有效治疗光滑面的初期龋损。

  8. 陕西地区老年人上前牙色度值的测量分析%Color measurements and analysis of maxillary anterior teeth of elder people in Shaanxi

    Institute of Scientific and Technical Information of China (English)

    谭战民; 李立刚; 李涛

    2012-01-01

    Objective To study the color distribution of maxillary anterior teeth of elder people in Shaanxi. Methods Based on the CIE 1976 L*a*b* color space,the values of L*、a*、b* of 632 maxillary anterior teeth from 119 elder people in Shaanxi were measured by ShadeEye NCC-Ⅱ Digital colorimeter. Results The value of L*、a*、b* of the maxillary central incisors,lateral incisors and canines was 72.63±6.17、-0.68±1.12、17.32±6.59,68.3±4.53±-0.44±1.22±11.79±6.93. And 66.73±.04,0.09±1.38,20.87±0.74, respectively.The value of L*,a*,b* between the male and female was not statistical differences (P>0.05),but there was significant differences among the maxillary central incisors, lateral incisors and canines in terms of L*,a* ,b* (P<0.05).The value of L* of was decreased gradually.while the value of a* was increased according to the order of the maxillary central incisors,lateral incisors and canines.The value of b* the maxillary lateral incisors was the smallest. Conclusion There was no statistical difference in the maxillary anterior teeth between male and female subjects in Shanxi. Among elder people in Shanxi.the maxillary central incisors were the brightest, while the maxillary lateral incisors were the lightest.The maxillary canines were redder and yellower than the incisors.ror teet%目的:研究陕西地区老年人上前牙色度值分布范围,为临床应用提供参考依据.方法:以CIE 1976 L*a*b*色度空间为基础,采用ShadeEye NCC-Ⅱ比色仪对119例陕西地区老年患者的6 32颗上前牙的L*、a*、b*值进行测量分析.结果:老年人上前牙各色度值范围分别为中切牙L*:72.63±6.17,a*:-0.68±1.12,b*:17.32±6.59;侧切牙L*:68.3±6.53,a*:-0.44±1.22,b*:11.79±6.93;尖牙L*:66.73±6.04,a*:0.09±1.38,b*:20.87±5.74.男女同名牙L*、a*、b*值之间无统计学差异(P>0.05).中切牙、侧切牙及尖牙的L*、a*、b*值相互之间均存在显著性差异(P<0.05).中切牙、侧切牙、尖牙的L*值逐渐

  9. Tratamento conservador de uma má oclusão Classe I de Angle, com atresia maxilar e apinhamento anterior The conservative treatment of Class I malocclusion with maxillary transverse deficiency and anterior teeth crowding

    Directory of Open Access Journals (Sweden)

    Lincoln I. Nojima

    2011-10-01

    Full Text Available Este artigo relata o tratamento de uma paciente do sexo feminino, com 15 anos de idade, má oclusão Classe I de Angle, severo apinhamento anterossuperior, desvio da linha média superior para o lado esquerdo e atresia maxilar, associada à mordida cruzada posterior. Os procedimentos executados envolveram a expansão maxilar com disjuntor palatino do tipo Haas modificado e montagem de aparelho fixo com sistema Edgewise standard. Foram realizados desgastes proximais nos incisivos e caninos inferiores para o alinhamento anterior, bem como redução da discrepância de Bolton com excesso inferior. Esse caso foi apresentado à diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria livre escolha, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.This article reports the treatment of a 15-years-old female patient, with Class I malocclusion, severe upper anterior crowding, midline deviation to the left side and maxillary transverse deficiency associated with posterior crossbite. The procedures involved rapid maxillary expansion with modified Haas appliance and the use of Edgewise standard system. Proximal wear were performed to the alignment of mandibular incisors, as well as to reduce the Bolton discrepancy. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, representative of category free, as partial fulfillment of the requirements for obtaining the title of BBO Diplomate.

  10. Clinical Application of Digitized Analog Prostheses in Aesthetic Restoration of Anterior Teeth%前牙美学修复中数字化模拟修复体的临床应用

    Institute of Scientific and Technical Information of China (English)

    周开强

    2015-01-01

    目的:研究前牙美学修复中数字化模拟修复体的应用效果。方法选择需要进行前牙美术修复的患者68例,随机分为两组,对照组使用常规修复方式,观察组使用数字化模拟方式。观察两组患者戴调节时间、修复效果以及患者对修复体及修复后面部外观的满意度。结果两组修改效果对比无差异(P>0.05)。观察组戴调节时间和修复后的满意度均优于对照组(P<0.05)。结论前牙美学修复使用数字画模拟方式,事前预估、制作方式都具备可行性,这个方式,能让最初使用的调整速度加快,且患者比较满意。%Objective To study the application of digitized analog prosthesis in anterior aesthetic restorations.MethodsA patient in need of art restoration front teeth 68 patients were randomly divided into two groups,the control group used conventional repair methods,observation group used digitized analog mode. Wearing regulation time,repairing effect,and patient satisfaction with restoration and repair the appearance of the rear section were observed. ResultsThere was no difference in modifying effect of contrast(P>0.05). Observation group wearing satisfaction adjust the time and after the repair than the control group(P<0.05). Conclusion The aesthetic restoration of anterior teeth using digital painting simulation mode,prior estimates, production methods are feasible,this approach,originaly used to adjust the speed to make faster,and more satisfied patients.

  11. 浅析联冠或固定桥法修复前牙松动移位缺失%Analysis of the Crown or Fixed Bridge Restoration of Anterior Teeth Loosening Deletion

    Institute of Scientific and Technical Information of China (English)

    向兰锋

    2013-01-01

    Objective To observe the periodontal disease patients before tooth mobility displacement or loss associated with the crown or fixed bridge restoration treatment ef ect. Methods 8 cases of anterior teeth 1~4 teeth loosening or 1~2 teeth missing patients with periodontal disease, periodontal therapy, in combination with the crown or fixed bridge do permanent splint fixation treatment, observation of 1~5 years, al patients were taken X-ray radiograph. Results the periodontal disease patients before tooth mobility displacement loss associated with the crown or fixed bridge restoration after treatment, loosening control, patients feel comfortable and beautiful, the high degree of satisfaction. Conclusion for patients with periodontal disease before tooth mobility displacement or lack of appropriate indications for the crown or fixed bridge restoration treatment, ef icacy, patient satisfaction, but the doctor must be designed to handle the crown gingival margin or bridge body position, and al ow patients to oral hygiene maintenance, ef ective control of plaque.%目的观察牙周病患者前牙松动移位或缺失用联冠或固定桥修复治疗的效果。方法选取8例前牙1~4颗松动移位或1~2颗缺失的牙周病患者,采用牙周基础治疗后,用联冠或固定桥做恒久夹板固定修复治疗,观察1~5年,所有病例均拍摄X线牙片。结果牙周病患者前牙松动移位缺失用联冠或固定桥修复治疗后,松动移位得到控制,患者感觉舒适美观,其满意度高。结论对牙周病患者前牙松动移位或缺失选择合适的适应症用联冠或固定桥修复治疗,效果肯定,患者满意,但医生一定要设计处理好冠龈缘或桥体位置,并让患者做好口腔卫生维护,有效控制菌斑。

  12. Teething Tots

    Science.gov (United States)

    ... the first set of teeth will fall out, tooth decay makes them fall out more quickly, leaving gaps ... brush and floss. Another important tip for preventing tooth decay: Don't let your baby fall asleep with ...

  13. 微种植体支抗压低上前牙的Typodont实验研究%Typodont experimental study of intruding maxillary anterior teeth by mini-implant

    Institute of Scientific and Technical Information of China (English)

    麦志辉; 艾虹; 卢红飞; 黄晓; 龙湘玲

    2009-01-01

    Objective To study the effect of mini-implant anchorage in different locations on intruding maxillary anterior teeth in Typodont models, and provide reference to clinical treatment Methods 42 standard Typodont models with anterior alveolar vertical excess were made and randomly divided into three groups(14 for each group): Group A: Mini-implants were put between central incisors, Group B: Mini-implants were placed between central and lateral incisors, Group C: Mini-implants were placed between lateral incisor and canine.0.98N force was applied to intrude the maxillary anterior teeth.The amount of intrusion and forward movement were measured by three-dimensional measuring apparatus.The tooth inclination was measured by Software Imageware 12; while the changes of dental arch and occlusive plane were studied by the same software.Results ① in three groups, the amount of intrusion ranged from (0.9220±0.3037)mm to (5.2354±0.9620) mm, central incisor>lateral incisor>canine.The closer position to the middle point of anterior arch for the mini-implants, the intrusive effect was more significant ② All teeth were found to have moved forward and inclined to different extents after being intruded by mini-implants.The closer position to the posterior arch for the mini-implants, the less forward movement and inclination were observed.③ The closer position to the posterior arch for the mini-implants, the less changes were found in dental arch and occlusive plane, and vice versa.Conclusions ① Maxillary anterior teeth can definitely be intruded by mini-implants.② The closer position to the posterior dental arch the mini-implants were placed, the less changes were found in intrution, inclination degree, dental arch and occlusive plane, and vice versa.%目的 在Typodont模型上,模拟临床应用微种植体支抗压低上前牙的过程,研究不同部位支抗对上前牙压低效果的影响.方法 制作上前牙槽骨垂直发育过度的标准Typodont模型42个

  14. Má oclusão Classe I de Angle, com mordida aberta anterior, tratada com extração de dentes permanentes Angle Class I malocclusion, with anterior open bite, treated with extraction of permanent teeth

    Directory of Open Access Journals (Sweden)

    Mírian Aiko Nakane Matsumoto

    2011-02-01

    Full Text Available A mordida aberta é uma anomalia com características distintas que, além da complexidade dos múltiplos fatores etiológicos, traz consequências estéticas e funcionais. Muitas alternativas têm sido utilizadas em seu tratamento, entre elas a grade palatina, forças ortopédicas, ajuste oclusal, camuflagem com ou sem exodontias, mini-implantes ou miniplacas e cirurgia ortognática. O diagnóstico preciso e a determinação da etiologia permitem estabelecer os objetivos e o plano de tratamento ideal para essa má oclusão. O presente relato descreve o tratamento de uma má oclusão Classe I de Angle, com padrão esquelético de Classe II e mordida aberta anterior, realizado em duas fases e que foi apresentado à diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 2, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.Open bite is an anomaly with distinct characteristics which, in addition to involving complex, multiple etiologic factors, entails aesthetic and functional consequences. Many alternative approaches have been employed to treat open bite, including palatal crib, orthopedic forces, occlusal adjustment, camouflage with or without extractions, mini-implants or mini-plates, and orthognathic surgery. By determining accurate diagnosis and etiology professionals can set the goals and ideal treatment plan for this malocclusion. This report, describing the two stages treatment of a Angle Class I malocclusion with Class II skeletal pattern and anterior open bite, was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, representative of category 2, as partial fulfillment of the requirements for obtaining the title of BBO Diplomate.

  15. 牙冠延长术用于前牙冠修复的牙周指标分析%Periodontal index analysis of crown lengthening surgery for anterior teeth crown restoration

    Institute of Scientific and Technical Information of China (English)

    李隽; 刘晓峰

    2014-01-01

    目的:评价牙周基础治疗及牙冠延长术治疗前牙不良冠修复所致牙周病的临床疗效。方法:选取30例前牙冠修复所致牙周病患者共105颗患牙,均采用牙周基础治疗及牙冠延长术后再行冠修复,观察不同时段临床冠长度的变化,记录各相关牙周指数并进行分析,评估术后全冠修复的临床效果。结果:术后短期内临床冠长度增加效果确切,治疗组术后的各项牙周指数均优于术前(P<0.05),与对照组比较无明显差异(P>0.05),在1年的观察期内保持相对稳定(P>0.05);全冠修复体的固位良好,边缘密合,龈缘与冠缘的位置关系相对稳定。结论:牙周基础治疗及牙冠延长术有利于不良冠修复所致牙周病的治疗,且冠延长术解决了生物学宽度的问题,确保了牙周健康的长期稳定。%Objective:To evaluate the clinical effect of initial therapy and crown lengthening surgery on anterior teeth involved with periodontal disease after crown restored. Method:Initial therapy and crown lengthening surgery were applied to 105 anterior teeth of 30 cases. After treatment all teeth were restored by crowns. At different time we observe changes in clinical crown length,record relevant periodontal index and analyse and evaluate clinical effect of the postoperative crown restoration. Result:Postoperative clinical crown length had obvious short-term effect.The experiment group's postoperative periodontal index were superior to preoperative index(P0.05),and remained relatively stable in one-year observation period (P >0.05).The retention of crown prosthesis was bet-ter,and the margin was fitted well and relatively stable to the margin of gingival. Conclusion:Crown lengthening surgery solved the problem of biologic width. Therefore,right selection of indications,initial therapy,crown lengthening surgery and accurate restoration design contribute to the treatment of periodontal

  16. 安氏Ⅱ1类错前牙宽度厚度与Bolton 指数测量分析%STUDY IN THE MESIODISTAL WIDTH AND THE CROWN THICKNESS OF ANTERIOR TEETH AND BONLTON INDEX IN CLASS Ⅱ1 MALOCCLUSION

    Institute of Scientific and Technical Information of China (English)

    徐佳瑛; 马超

    2015-01-01

    目的:通过对正常与安氏Ⅱ1类错模型的比较,分析上下颌牙冠宽度、上颌牙冠厚度、Bolton指数差异,为安氏Ⅱ1类错矫治设计提供参考。方法以正常,安氏Ⅱ1类错各50例为研究对象,分别进行牙冠宽度、牙冠厚度的测量并计算。结果安氏Ⅱ1类错上下颌侧切牙和下颌中切牙的牙冠宽度比正常大,差异有统计学意义(P<0.05)。 Bolton 指数前牙比:正常>安氏Ⅱ1类错。安氏Ⅱ1类错上前牙牙冠厚度均大于正常,差异有统计学意义(P <0.05)。 结论上下颌牙量不调和上前牙牙冠厚度变化会对安氏Ⅱ1类错矫治后期正常前牙咬合关系的建立产生影响。%Objective To compare the mesiodistal width and the crown thickness of anterior teeth and Bolt‐on Index of Class Ⅱ 1 and normal occlusion casts in order to provide reference for the diagnosis and treat‐ment of Class Ⅱ 1 malocclusion .Methods Fifty cases of normal occlusion ,Class Ⅱ 1 malocclusion were selected ,respectively .Mesiodistal width of anterior teeth and the upper anterior teeth's thickness were measured and Bolton Index was calculated .Results The results indicated that mesiodistal width of maxil‐lary and mandibular lateral incisors and mandibular central incisors in Class Ⅱ 1 malocclusion were larger than that in normal occlusion with significant difference(P< 0 .05) .Bolton Index of normal occlusion was larger than that of Class Ⅱ 1 malocclusion .The crown thickness of upper anterior teeth in Class Ⅱ 1 maloc‐clusion were larger than that in normal occlusion with significant difference(P < 0 .05) .Conclusion The maxillary and mandibular teeth size discrepancy and the change of the upper anterior teeth's thickness can have effect on the ultimate occlusion of Class Ⅱ 1 malocclusion after orthodontic treatmeant .

  17. Observation of effect of using mineral trioxide aggregate to prevent external resorption in traumatic permanent anterior teeth%预防性使用MTA控制外伤恒前牙牙根外吸收的临床疗效观察

    Institute of Scientific and Technical Information of China (English)

    周中苏

    2013-01-01

    目的:探讨牙根发育完成的外伤冠折露髓恒牙使用MTA预防性控制根吸收的临床疗效.方法:对109颗牙根发育完成的冠折露髓恒牙随机分为预防性使用MTA治疗组(55颗)和常规治疗组(54颗),完成根管治疗.2年后,通过临床症状及X线根尖片判断疗效.结果:预防性使用MTA治疗组控制根吸收成功率为98.07%,对照组成功率为86.00%,两组间比较差异有统计学意义(P<0.05).结论:外伤恒前牙使用MTA预防性控制根吸收临床疗效好,值得临床应用.%Objective:To evaluate the effect of using mineral trioxide aggregate to prevent external resorption in traumatic permanent anterior teeth.Method:55 traumatic permanent anterior teeth with completed apices referred to our hospital for root canal treatment received an procedure with MTA,and 54 traumatic permanent anterior teeth was filled with gutta-flow.Patients were recalled after 2 years to evaluate the effect.Result:The success rate of MTA group was 98.07 % and control group was 86.00 %.There was significant different in two groups (9 < 0.05).Conclusion:The effect of MTA in preventing external resorption of traumatic permanent anterior teeth is effective,MTA is worth clinical applying.

  18. A clinical cephalometric study of mini-implant anchorage for en-masse retraction of eight maxillary anterior teeth%微种植体辅助整体内收上前牙段的头影测量

    Institute of Scientific and Technical Information of China (English)

    张华; 麦志辉; 卢红飞; 艾虹; 文冲

    2011-01-01

    目的:研究微种植体支抗在矫治上颌前突病例中整体内收上前牙段的应用.方法:选择5例上颌前突患者,拔除第二前磨牙,采用直丝弓矫治技术,辅以微种植体支抗同时整体内收前牙段(6个前牙及2个第一前磨牙),通过X线头影测量分析,观察矫治前后上颌骨软硬组织的变化.结果:上颌骨的变化轻微;切牙平均内收(4.6±1.5)mm,压低(0.8±1.1)mm,根尖后移(1.7±1.4)mm,切牙与腭平面的夹角减少(6.8±3.5)度;支抗磨牙水平前移(0.5±0.3)mm,没有出现明显的颌向伸长;上唇突度减少(2.0±0.9)mm,鼻唇角增大(3±2.4)度.结论:微种植体能提供稳定的支抗,同时整体内收上前牙段,最大限度避免支抗的丧失,改善上唇突度.%Aim: To Study the efficiency of mini-implants as intraoral anchorage units for en-masse retraction of the 6 maxillary anterior teeth and 2 first premolars after the second premolars are extracted. Methods: Five patients requiring high anchorage after extraction of the maxillary second premolars were selected for this study. Straight wire appliance and mini-implants were used for en-masse retraction, Horizontal , vertical, and angular positions of the maxillary ? Rst molar and central incisor were evaluated ceph-alometrically before and after orthodontic retraction. Results; The edge of upper incisors were retracted (4. 6 ±1. 5)mm and intruded (0. 8 ±1. L)mm, the root apex moved distally (1. 7 ± 1.4)mm. The maxillary first molars showed mesial movement of (0. 5 ±0. 3)mm. The nasolabial angle increased (3 ±2.4)° and the angle between upper incisor and PP-plane decreased (6. 8 ± 3. 5 ) °. Conclusion: Mini-implants are efficient for intraoral anchorage reinforcement for en-masse retraction and intrusion of maxillary anterior teeth.

  19. 间接数字化成像技术分析208颗山东地区汉族人恒前牙根管的弯曲情况%Root canal curvature of 208 anterior teeth from Han Chinese people in Shandong Province An indirect digital X-ray radiography analysis

    Institute of Scientific and Technical Information of China (English)

    王玲香; 邓婧; 王大山

    2011-01-01

    BACKGROUND: It can to a certain extent prevent complications during root canal preparation and improve the success rate of root canal therapy by understanding root canal anatomical configuration and bending degree.OBJECTIVE: To investigate the root canal curvature of permanent anterior teeth from Han Chinese people in Shandong province.METHODS: A total of 208 anterior teeth were collected and examined by indirect digital X-ray radiography both from labiolingual and mesiodistal directions,according to Schneider method,the data obtained were analyzed.RESULTS AND CONCLUSION: Most root canals of anterior teeth from Shandong province were typeⅠ,and more than half were curved. The most curvature happened in the apical third. The highest rate of canal curvature occurred in maxillary canines. Except the central incisors,the S-shaped canal was observed on the rest teeth. The radius of mandibular anteriors was obvious longer in labiolingual directions than that in mesiodistal directions. Root canal curvatures of anterior teeth from Shandong province are complex and have a higher bending rate.%背景:熟悉根管解剖形态,了解其弯曲程度,可以在一定程度上预防根管预备时的并发症,提高根管治疗的成功率.目的:了解山东地区汉族人恒前牙根管弯曲的情况.方法:采用间接数字化X射线成像技术,对收集的离体208颗前牙进行颊舌向和近远中向拍摄,采用改良的Schneider测量方法,分析根管弯曲情况.结果与结论:山东地区汉族人前牙根管多为Ⅰ型根管,且半数以上存在弯曲,弯曲部位多集中在根尖1/3,尤以上颌尖牙根管弯曲发生率最高,除上颌中切牙外,其余牙位均有S形弯曲根管,下颌前牙在唇舌方向上弯曲半径明显高于近远中方向.提示山东地区汉族人恒前牙根管形态复杂,弯曲率较高.

  20. Affecting factors for gingival papilla in front of maxillary anterior teeth after operation%天然上前牙(根)术后龈乳头影响因素的探索

    Institute of Scientific and Technical Information of China (English)

    李蓬; 唐志辉; 许卫华; 张毅

    2011-01-01

    Objective: To analyze the factors affecting the gingival papilla in front of maxillary anterior teeth with natural roots, so as to provide proof for clinical therapy. Methods: 46 maxillary anterior papilla of 20 patients underwent flap surgery were studied. In which 26 papilla adjacent to natural intact teeth and 20 to teeth to be restorated. Plaque Index ( PLI ), probing depth ( PD), bleeding index (BI) and papilla index score (PIS) were recorded before surgery. Thickness of gingival papilla were measured with electrical vernier caliper, a standardized periodontal probe with Williams markings was used for measurements fellowing parameters: distance from crest of bone to dental cusp of adjacent tooth (root to be restorated)/distance from crest of bone to contact point( natural intact teeth), mesiodistal distance between two roots at crest level, distance from crest of bone to midlabial point of tooth, buccal- lingual width of crest during surgery. Distance from dental cusp of adjacent tooth to the base contact point. PIS, PLI, PD and BI were measured 6 months after surgery. Relationship between PIS and the clinical parameters were analyzed respectively with Logistic analysis. Results: When the distance from the crest of bone to the base of the contact point was increasing, PIS and the percentage of presence of papilla decreased significantly. Logistic analyze showed, after adjusting PD, BI and PLI, only distance from the crest of bone to the base of the contact point was the significant affecting factor( OR = 0.43, 95% CI 0.184 - 0.99, P = 0.047 ). The volume of papilla in thinner gingival biotype was significantly smaller than the thicker type( 16.8 ±7.63 vs 27.96 ±9.89mm3 ,P <0.001 ). Conclusion: Distance from crest of bone to contact point was the most important factor affecting the gingival papilla, different gingival biotype may affect papilla volume.%目的:明确影响术后天然牙根牙龈龈乳头的主要因素,为临床治疗提供依据.方

  1. 不翻瓣即刻牙种植对患者口腔软硬组织的影响分析%Effect of immediate dental implant on the oral and soft tissue of patients with anterior teeth area

    Institute of Scientific and Technical Information of China (English)

    方杨

    2016-01-01

    Objective: To study the effect of immediate dental implantation on the oral and soft tissue of the patients with anterior teeth area. Methods: From January 2013 to June 2015 in our hospital for imme-diate dental implant patients (n=30). The digital random were randomly divided into observation group and control group, 15 cases. The patients in the control group were flap in immediate implant in, the observa tion group of flapless immediate dental implantation. The effects of two groups were compared. Results: The survival rate of the observation group was 93.33%(14/15), significantly higher than that in the control group of 86.67%(13/15). The incidence of postoperative symptoms was significantly lower than that of the control group. Observation group, operation time and alveolar bone status were signifi-cantly lower than those of the control group, two groups of vas before treatment, PES score compared to no difference, respectively after the treatment, the observation group VAS score was significantly lower than that of the control group, and PES score was significantly higher than that of control group. After 1 years of operation, the crest crest absorption of the observation group was (0.71 ±0.15)mm, was signifi-cantly lower than that of the control group(1.13±0.32)mm. The difference was statistically significant (all P<0.05). Conclusion: The immediate dental implantation in the anterior teeth area of the maxillary an-terior teeth is significant, which can reduce postoperative pain, reduce the incidence of edema, and can relieve the pain and safety of the patients, which is worthy of clinical application.%目的:研究不翻瓣即刻牙种植对患者口腔软硬组织的影响并进行分析。方法:选取从2013年1月至2015年6月,于我院进行即刻牙种植患者30例。以数字法随机随机分为观察组及对照组各15例。其中对照组患者进行翻瓣即刻牙种植术,观察组则进行不翻瓣即刻牙种植术,对比两组

  2. Delayed replantation of avulsed teeth

    Directory of Open Access Journals (Sweden)

    Adil N

    2007-05-01

    Full Text Available Dental injuries are very common and their extent has been classified by Ellis. Avulsion of tooth is a grievous injury and ranges from 1-16% among the traumatic injuries, of which maxillary anterior are commonest. Reimplantation of avulsed teeth is a standard procedure. However, it has certain limitations. Most often their management is very challenging. In this case report we are presenting the management of maxillary incisors by replantation after 36 hrs in a 12 year old girl.

  3. Delayed replantation of avulsed teeth

    OpenAIRE

    Adil N; Ahmed S; Jindal M; Arshad S

    2007-01-01

    Dental injuries are very common and their extent has been classified by Ellis. Avulsion of tooth is a grievous injury and ranges from 1-16% among the traumatic injuries, of which maxillary anterior are commonest. Reimplantation of avulsed teeth is a standard procedure. However, it has certain limitations. Most often their management is very challenging. In this case report we are presenting the management of maxillary incisors by replantation after 36 hrs in a 12 year old girl.

  4. Teeth Injuries (For Parents)

    Science.gov (United States)

    ... Things to Know About Zika & Pregnancy First Aid: Teeth Injuries KidsHealth > For Parents > First Aid: Teeth Injuries ... or young child injures the gums or baby teeth: Apply pressure to the area (if it's bleeding) ...

  5. Clinical management of supernumerary teeth: A report of two cases

    OpenAIRE

    Mittal M.; Sultan A

    2010-01-01

    Supernumerary tooth may closely resemble the teeth of the group to which it belongs, i.e. molars, premolars or anterior teeth, or it may bear little resemblancein size or shape to which it is associated. Many complications can be associated with supernumeraries, like impaction, delayed eruption or ectopic eruption of adjacent teeth, crowding, development of median diastema and eruption into floor of the nasal cavity. This may also cause the formation of follicular cysts with significant bone ...

  6. 微型种植体在前牙牙列缺损种植修复中的应用%Application of microimplants in the restoration of dentition defect in anterior teeth area

    Institute of Scientific and Technical Information of China (English)

    徐莉亚; 胡劲松; 李春林

    2015-01-01

    Objective To evaluate clinical effects of restorations in anterior teeth area with the microimplants and compare the effects between microimplant supported fixed dentures, removable partial dentures and porcelain-fused-to-metal(PFM) fixed bridges. Methods From January 2012 to December 2014, 26 cases of patients were selected as the experimental group in Guiyang Stomatological Hospital. Experiment group:The sample consisted of 26 consecutively treated partially edentulous patients who had a total of 30 microimplants, which were 2.3mm or 2.8mm in diameter and placed in 3.5-5mm edentulous space.The final restorations were fabricated with zirconia all ceramic crow 3 months later.All implants were examined clinically and radiologically in 3 months, 6 months,12 months and 24 months respectively.Another 48 cases of patients were selected as control group in the same period in the rehabilitation department of the hospital.Control group:A sample consisted of 48 patients who had a single missing tooth in the anterio teeth area.24 patients were treated with removable partial dentures(RPDs). 24 patients were treated with PFM fixed bridges. After the denture completion, the satisfaction survey to the patients was made about the aesthetic results, mastication, retention and comfort. Results Two loosing implants were removed, the remaining implants were successfully fabricated with crows.Bone level surrounding the implant is highly stable. Appearance of restorations had a good effect.The patients were satisfied with the microimplant supported fixed dentures.The satisfaction of patients with implant fixed dentures and PFM fixed bridges were higher than the patients with RPDs in aesthetic results, mastication, retention and comfort(P<0.05). The satisfaction of patients with implant fixed dentures was higher than the patients treated with PFM bridges in the comfort. No obvious differences were observed about aesthetic results, mastication, retention satisfaction among implant fixed

  7. Management of Multiple Impacted Teeth: A Case Report and Review

    Science.gov (United States)

    Ajith, Sreedevi D; Shetty, Smitha; Hussain, Huma; Nagaraj, Tejavathy; Srinath, M

    2014-01-01

    Interdisciplinary care for the management of impacted teeth provides a holistic method of treating patients. Careful planning is necessary to reach the desired treatment goals. This article attempts to highlight the importance of diagnosis and adequate treatment planning for successful eruption of impacted teeth. The concept of forced eruption to improve the bone morphology of the impacted teeth has been used to treat a case of multiple impacted teeth. This paper reviews the diagnosis and management of impacted teeth. A case report of multiple impacted maxillary anterior teeth of a 13-year-old female patient has been presented. How to cite the article: Ajith SD, Shetty S, Hussain H, Nagaraj T, Srinath M. Management of multiple impacted teeth: A case report and review. J Int Oral Health 2014;6(3):93-8. PMID:25083041

  8. Supernumerary teeth: Report of four unusual cases

    Directory of Open Access Journals (Sweden)

    Arun Kumar

    2012-01-01

    Full Text Available Supernumerary tooth denotes duplication of tooth in the normal series. It is a developmental anomaly and has been argued to arise from multiple etiologies. These teeth may remain embedded in the alveolar bone or can erupt into the oral cavity. The supernumerary tooth might cause esthetic and/or functional problems, especially if it is situated in the maxillary anterior region. Complications reported were delayed or prevented eruption of succedaneous teeth, displacement or rotation, crowding of the affected region, abnormal diastema, dilacerations, cystic formation, and sometime eruption into the nasal cavity. In this case report, four unusual cases of supernumerary teeth that resulted in varying degrees of disturbances in permanent dentition are presented. Conservative surgical intervention and light orthodontic forces were used to bring the teeth into normal position with minimal disturbance to the surrounding oral structures.

  9. [A Rare Case of Neonatal Teeth].

    Science.gov (United States)

    Martins, Andreia A; Ferraz, Cláudia; Vaz, Rute

    2015-01-01

    Neonatal teeth is a rare disorder of tooth eruption, arising in the oral cavity, usually in the anterior mandible, in the first month of life. Its etiology is unknown. This condition can cause breastfeeding difficulties, besides aspiration or swallowing of the teeth. We describe the case of a premature infant in the second day of life presented with gingival edema, redness and discrete swelling in the region of the mandibular central incisors. Ten days later, two small teeth with hypermobility were detected. Extraction of those teeth was performed. With this clinical case we intend to show the rarity of this entity, especially in premature infants, the possible association with various syndromes and the need for a multifactorial approach to the treatment decision (extraction / conservative treatment). PMID:26849764

  10. Dentulous Appliance for Upper Anterior Edentulous Span

    OpenAIRE

    Chalakkal, Paul; Devi, Ramisetty Sabitha; Srinivas, G Vijay; Venkataramana, Pammi

    2013-01-01

    This article discusses about a fixed dentulous appliance that was constructed to replace the primary upper anterior edentulous span in a four year old girl. It constituted a design, whereby the maxillary primary second molars were used to support the appliance through bands and a wire that contained an acrylic flange bearing trimmed acrylic teeth, anteriorly. The appliance was functionally and aesthetically compliant.

  11. MULTIPLE RETAINED TEETH IN MANDIBLE: A Case Report

    OpenAIRE

    Cvetan Cvetanov; Ivan Chenchev; A. Bakardjiev

    2010-01-01

    Purpose: The aim of this science report is to show a rare case of multiple impacted teeth at adult patient and our propose clinical approach.Materials and methods: The clinical case is showed from adult man /64-year old/ with multiple impacted teeth (6 impacted teeth in the anterior place on the mandible) were not suggestive of any syndrome or metabolic disorder. The extraction of the impacted teeth was made on two stage with piezosurgery unit under local anaesthesia. For prevention of post...

  12. 数字化快速成型种植导板在上前牙区种植的临床应用研究%Application of digital rapid process implant template in implant surgery of maxillary anterior teeth area

    Institute of Scientific and Technical Information of China (English)

    时光辉; 任春富; 杨中锐; 朱永翠; 翟蕾

    2013-01-01

    目的:评价数字化快速成型种植导板在上前牙区种植的临床应用效果。方法对2010年4月至2012年6月在河南大学第一附属医院口腔科就诊的6例上前牙缺失患者,拍摄螺旋CT及常规取超硬石膏模型,经过三维重建、模拟种植及数字化快速成型技术制作导板后,将该导板应用于手术中。术后再次拍摄螺旋CT并与术前的情况进行对比。结果6例患者均应用该导板完成手术,手术效果满意。患者术后反应轻微,植入后3~6个月均顺利完成冠部修复,美观效果良好。经过术前、术后CT结果对比,种植体颈部的偏移为(0.71±0.17)mm,根部的偏移为(0.85±0.19)mm。结论数字化快速成型种植导板应用于上前牙种植,具有明显的技术优势与广阔的应用前景。%Objective To evaluate the effect of the application of digital rapid process implant template in implant sur-gery of maxillary anterior teeth area. Methods Totally six patients with maxillary anterior teeth missing who need im-plant surgery were collected and the implant template was made by digital rapid process technology and was used in im-plant surgery. Then the deviations of the implant body were measured. Results The surgery process was satisfactory. Slight postoperative reaction was observed,and 3-6 months after implant crown repair was successfully completed. In CT image the deviation of the neck and apical of the implant body was(0.71±0.17)mm and(0.85±0.19)mm,respectively. Conclusion The digital rapid process implant template is a very effective method in implant surgery of maxillary anteri-or teeth area.

  13. Cervicoplastia anterior Anterior cervicoplasty

    Directory of Open Access Journals (Sweden)

    Lucas Gomes Patrocínio

    2004-10-01

    Full Text Available Muitos pacientes buscam correção estética da frouxidão da pele do pescoço, depósito de gordura na região submentoneana ou bandas de platisma. Em grande parte dos casos a ação medial, via cervicoplastia anterior é necessária. OBJETIVO: Demonstrar a casuística e avaliar os resultados e complicações com a técnica de cervicoplastia anterior no Serviço de Otorrinolaringologia da Universidade Federal de Uberlândia. FORMA DE ESTUDO: Relato de série. PACIENTES E MÉTODOS: Quarenta e dois pacientes, entre 39 e 65 anos de idade, sendo 40 (95,2% do sexo feminino e 2 (4,8% do masculino, foram submetidos a cervicoplastia anterior. Retrospectivamente foram avaliados resultados e complicações. RESULTADOS: Destes, 34 apresentaram resultados satisfatórios, 4 apresentaram déficit estético notado somente pelo cirurgião, 3 apresentaram déficit estético notado somente pelo paciente e 1 apresentou déficit estético necessitando cirurgia revisional. Ao estudo fotográfico, todos os pacientes apresentaram melhora do perfil cervical, redução das bandas de platisma e da frouxidão da pele, estabilização da musculatura cervical e acentuação do ângulo cervicomental, em graus variados. Houve complicação em 2 casos (discreto serohematoma e cicatriz um pouco alargada. CONCLUSÃO: A cervicoplastia, associada ou não à tração lateral pela ritidoplastia, é uma técnica que produz resultados satisfatórios na grande maioria dos casos.Many patients look for aesthetic correction of the laxity of neck skin, submandibular fat deposit or platisma bands. In a large part of the cases, medial action, through anterior cervicoplasty is necessary. AIM: To demonstrate the casuistic and to evaluate the results and complications with anterior cervicoplasty technique in the Otorhinolaryngology Service of the Federal University of Uberlândia. STUDY DESIGN: Serie report. PATIENTS AND METHODS: Forty-two patients, between 39 and 65 years of age, being 40 (95

  14. Brushing your infant's teeth

    Science.gov (United States)

    ... gov/ency/patientinstructions/000769.htm Brushing Your Child’s Teeth To use the sharing features on this page, ... how to brush their teeth on their own. Tooth and Gum Care for Young Children You should ...

  15. Malocclusion (Misaligned Teeth)

    Science.gov (United States)

    ... 2 Diabetes, Heart Disease a Dangerous Combo Are 'Workaholics' Prone to OCD, Anxiety? ALL NEWS > Resources First ... crown may fracture, and teeth may eventually loosen. Causes There are several causes of misaligned teeth: Size ...

  16. Wisdom Teeth Management

    Science.gov (United States)

    Wisdom Teeth Management Wisdom teeth, or third molars, are the last teeth to develop and appear in your mouth. They come in between the ages ... the “Age of Wisdom.” What Is an Impacted Tooth? When a tooth is unable to fully enter ...

  17. Impacted wisdom teeth

    OpenAIRE

    Dodson, Thomas B.; Susarla, Srinivas M.

    2010-01-01

    Impacted wisdom teeth occur because of a lack of space, obstruction, or abnormal position. They can cause pain, swelling, and infection, and may destroy adjacent teeth and bone.The incidence of impacted wisdom teeth is high, with some 72% of Swedish people aged 20 to 30 years having at least one impacted third molar.

  18. 纤维根管桩根管内固定联合复合树脂粘接修复儿童前牙冠根联合折%Fibrous root canal dowel internal fixation combined with composite resin adhesion in treatment of crown-root fracture of anterior teeth in children

    Institute of Scientific and Technical Information of China (English)

    汪隼; 曹慧珍

    2012-01-01

    Objective To investigate the clinical effect of fibrous root canal dowel internal fixation combined with composite resin adhesion in treatment of crown-root fracture of anterior teeth in children. Methods Eleven children (11 teeth) aged 11 to 14 with crown-root fracture caused by trauma of upper mandible medial incisor were selected. All were horizontal fracture or oblique fracture, and there was no longitudinal fracture and alveolar bone fracture. Patients received one-visit endodontics treatment after external fixation of the injured teeth, and were follow up for one week. The crown-root broken ends were restored with fibrous root canal dowel internal fixation combined with composite resin adhesion. Results Nine teeth were successfully restored, and were cosmetically and functionally resumed in short term. One patient failed due to lower palatal fracture line, with more wound hemorrhage and exudation. And the other patient failed due to consumption of hard food, which led to the loose broken ends. Conclusion Fibrous root canal dowel internal fixation combined with composite resin adhesion may be an ideal temporary restoration method in treatment of crown-root fracture of anterior teeth in children, which can resume cosmetics and function in short term and decrease loss in dental and periodontal tissues to the full extent.%目的 观察纤维根管桩根管内固定联合复合树脂粘接对儿童前牙冠根联合折的修复效果.方法 上颌中切牙外伤致冠根联合折断的患者11例(患牙11颗),年龄11 ~ 14岁,均为横折或斜折,无纵折,无牙槽骨骨折;就诊予以断牙外固定后即刻行一次性根管治疗,观察1周;采用纤维根管桩根管内固定加冠根断端复合树脂粘接的方法进行断端自体牙修复.结果 11颗患牙中,9例治疗成功,短期内恢复美观和功能,效果满意;失败2例,其中1例为腭侧折断,折断线较低,出血、渗出较多;另1例患儿未遵医嘱食用硬物

  19. 前牙IPS热压铸造全瓷粘接桥修复的3年临床应用研究%All-ceramic resin bonded fixed partial denture made of IPS hot-pressed casting porcelain restore anterior missing teeth: a three years clinical observation

    Institute of Scientific and Technical Information of China (English)

    周团锋; 王新知; 张桂荣

    2011-01-01

    Objective :To clinic observation of IPS Empress2 and IPS e. max all ceramic resin bonded fixed partial dentures used in one anterior teeth lost in upper jaw or less than two anterior tooth lost in lower jaw. Methods : 22 patients, 26 restorations had been made, which included 16 single-retainer all ceramic resin bonded fixed partial dentures and 10 two-retainers all ceramic resin bonded fixed partial dentures. Secondary caries of the abutments, shade in the margin of the retainers and the integrity of the restorations had been observed at 3 months, 6 months, 1 year, 2 years and 3 years after all ceramic resin bonded fixed partial dentures having been bonded. Results : In the 3 years of clinic observation of the anterior all ceramic resin bonded fixed partial dentures, 1 two-retainers restoration lost bond after it had been made for 3 months, a retainer of one two-retainers restoration was broken after 6 months, but they are still used after modified as one-retainer all ceramic resin bonded fixed partial dentures, 1 two-retainers restoration lost bond two year later, It was integrity and re-bonded again that was still stable. No secondary carries and no shade in margin of the retainers had been found. Their color matches with the nature teeth excellently. The success rate was 88.5% . Conclusion: IPS Empress 2 and IPS e. max all ceramic resin bonded fixed partial dentures should be a good selection in one or two teeth lose in anterior jaws.%目的:观察单个上前牙或下颌2个以内前牙缺失采用IPS Empress 2或IPS e.max热压铸造全瓷粘接桥的临床修复效果.方法:22位患者,共制作26件前牙热压铸造全瓷粘接桥,包括16例单翼全瓷粘接桥和10例双翼全瓷粘接桥,修复后3个月、6个月、1年,2年和3年观察修复体的完整性,基牙的继发龋,边缘着色及修复体的颜色匹配.结果:1例双翼全瓷粘接桥修复后3个月脱落;1例双翼全瓷粘接桥6个月后一侧连接体折断,均改为单翼

  20. Evaluation of crown mesiodistal diameter of permanent teeth

    Directory of Open Access Journals (Sweden)

    H. Ravanmehr

    1994-06-01

    Full Text Available The aim of this study was to evaluate mesiodistal diameter of permanent teeth and evaluating it's distribution in Iran. In current study, 850 plastery impressions or 16590 teeth were precisely measured by a digital coulis with 0.01 mm accuracy.The obtained measures of the permanent teeth are shown in table 1. Table (4 demonstrates the symmetry of left and right maxillary and mandibular teeth. Obtainedmeasurements in Table 1 were compared with Gran's measures (Table 2 which are shown in Table (3.Bolton analysis was done and results were found close to the BolType text or a website address or translate a document.ton measures. It was concluded that it is better to replace measurements of our society instead of Bolton's. Since we found minor difference with the measures of other researchers, especially for teeth anterior to first molar, using our measures in treatment plans would not bring about any problem.

  1. Clinical research on segmental invisible technique with mini-implant for en-masse retraction of maxillary anterior teeth%片段隐形矫治器结合微种植体内收上前牙的临床研究

    Institute of Scientific and Technical Information of China (English)

    金丽飞; 黄一慧; 弓国梁; 林新平

    2016-01-01

    Objective To evaluate the clinical efficiency of segmental invisible technique with mini-implant for en-masse retraction of maxillary anterior teeth on the aspect of vertical and torque in the treatment of bimaxillary protrusion. Methods Twelve subjects with upper dental alveolar bone protrusion were selected for this study. Arch-dimension variables were evaluated by cephalometric and dental models before and after orthodontic retraction. All data were analyzed by SPSS 20. 0 software. Results For vertical control, U1E-PP was increased by 0. 78 mm, U1AP-PP was decreased by 0. 29 mm, while the change of U1CR-PP showed no significant difference ( P>0. 05). For sagittal control, all the anterior teeth showed a decreased torque with canine displaying uprighting. Conclusion Segmen-tal invisible technique with mini-implant is efficient in the vertical and torque control of anterior teeth in the treatment of bimaxillary protrusion, and it can demonstrate invisible and aesthetic orthodontic effects.%目的:评估片段隐形矫治器结合微种植体矫治前突患者时对上前牙垂直向和转矩方面的控制效果。方法选取12例双牙槽前突患者,通过测量治疗前后X线头颅定位侧位片上颌前牙矢状向与垂直向的变化值,以及模型上的转矩变化值,使用SPSS 20.0软件进行统计分析。结果治疗后上切牙切缘至腭平面距离U1E-PP增加0.78 mm,上切牙根尖点至腭平面距离U1AP-PP减小0.29 mm,上切牙阻抗中心至腭平面距离U1CR-PP的变化无统计学差异(P>0.05),上切牙阻抗中心的位置基本不变;治疗后的上前牙转矩值减少,尖牙出现直立趋势。结论片段隐形矫治技术治疗前突患者对其上前牙的垂直向和转矩控制较好,总体获得了良好的治疗效果,并且在治疗期间充分发挥了隐形、美观的矫治效果。

  2. Estimating Gear Teeth Stiffness

    DEFF Research Database (Denmark)

    Pedersen, Niels Leergaard

    2013-01-01

    The estimation of gear stiffness is important for determining the load distribution between the gear teeth when two sets of teeth are in contact. Two factors have a major influence on the stiffness; firstly the boundary condition through the gear rim size included in the stiffness calculation and...

  3. Two cases with supernumerary teeth in lower incisor region.

    Science.gov (United States)

    Yokose, Taishi; Sakamoto, Teruo; Sueishi, Kenji; Yatabe, Kenichi; Tsujino, Keiichirou; Kubo, Shuhei; Yakushiji, Masashi; Yamaguchi, Hideharu

    2006-02-01

    Abnormalities in number of teeth are occasionally noted in clinical cases. Many theories have been proposed as regards the causes of the occurrence of supernumerary teeth, including atavism theory, mechanical tooth germ separation theory, tissue induction theory, and dental laminar morphological disturbance theory. However, none of these theories alone offers a sufficient explanation for this phenomenon. The incidence of supernumerary permanent teeth is approximately 1-3%. These are the maxillary anterior teeth, the maxillary molars, and the maxillo-mandibular premolars in terms of descending order of site of occurrence. On the other hand, incidence in the mandibular anterior tooth area, of which there have been few detailed reports, is about 0.01%, a markedly low value. In this paper, we report two rare cases of supernumerary teeth in the mandibular incisor area. We discuss their etiology and orthodontic treatment, and detail a differential diagnosis between the normal and supernumerary teeth. We found that it was difficult to establish a clear etiology and differentiation between the normal and supernumerary teeth. PMID:16924155

  4. [Cryopreservation of teeth].

    Science.gov (United States)

    Zimmerli, Melanie; Filippi, Andreas

    2010-01-01

    After tooth loss dental implants or fixed prosthetic restorations are not indicated in children and adolescents due to incomplete maxillary and mandibular development. Cryopreservation is a method for long-term storage of healthy teeth which were removed for orthodontic reasons or due to traumatic origin. These preserved teeth can be used as autogenous replants or transplants after tooth loss. During transport to and from the freezing facilities prior to freezing the teeth are stored in a cell culture medium. The tooth is transferred into a freezing tube containing cell culture medium and cryoprotectant DMSO. Teeth autotransplanted after cryopreservation show vitality of the PDL cells. Usually no enamel and/or dentinal cracks can be observed. After tooth loss transplantation of cryopreserved teeth could be an effective and biological therapy for tooth replacement. PMID:21545030

  5. Mouth and Teeth (For Parents)

    Science.gov (United States)

    ... Things to Know About Zika & Pregnancy Mouth and Teeth KidsHealth > For Parents > Mouth and Teeth Print A ... lives. continue Basic Anatomy of the Mouth and Teeth The entrance to the digestive tract, the mouth ...

  6. Supernumerary teeth in clinical practice

    OpenAIRE

    Szkaradkiewicz, Anna K; Karpiński, Tomasz M.

    2011-01-01

    Introduction: Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of teeth. The prevalence rates of supernumerary teeth in the permanent dentition amounts 0.1-6.9%, and in deciduous dentition 0.4-0.8%. The presence of supernumerary teeth can be found in everyday dental practice. Case presentation: We describe 3 cases of patients with supernumerary teeth. First patient had supernumerary lateral incisor 12s, second - premolar fu...

  7. Effect of passive self-ligating bracket placement on the posterior teeth on reduction of frictional force in sliding mechanics

    OpenAIRE

    Kim, Kyu-Ry; Baek, Seung-Hak

    2016-01-01

    Objective The purpose of this study was to investigate the static (SFF) and kinetic frictional forces (KFF) in sliding mechanics of hybrid bracket systems that involve placing a conventional bracket (CB) or active self-ligating bracket (ASLB) on the maxillary anterior teeth (MXAT) and a passive SLB (PSLB) on the maxillary posterior teeth (MXPT). Methods The samples consisted of two thoroughbred types (group 1, anterior-CB + posterior-CB; group 2, anterior-ASLB + posterior-ASLB) and four hybri...

  8. 磨牙区多生牙3例%Supernumerary teeth located in molar region: Three cases report

    Institute of Scientific and Technical Information of China (English)

    戴杰; 杨卫江; 沈宣江

    2011-01-01

    多生牙是一种牙齿数目多于人体生理牙数的牙齿发育异常,多见于上颌前牙区,而磨牙区少见.本文报道3例磨牙区多生牙病例.%Supernumerary teeth is one of the teeth dysplasia that the number of teeth exceeded normal. Most of supernumerary teeth reported were located in anterior teeth region, but rare cases were reported in molar region. This paper reported three eases that supernumerary teeth located in molar region.

  9. 疑难根管再治疗中显微超声技术的临床应用%Root canal treatment of complicated anterior teeth with dental operating microscope and ultrasonic instru-ments

    Institute of Scientific and Technical Information of China (English)

    周艳; 秦念红; 徐铁华; 林爱娟

    2014-01-01

    目的:评价显微超声技术在疑难根管再治疗中的应用。方法:选取需要根管再治疗的前牙56颗,62个根管,在根管显微镜下,采用超声根管锉,顺利疏通根管后,常规完成根管预备和根管充填,观察并评价临床疗效。结果:62个根管中,疏通了21个钙化根管,取根管内断械6个,去除根管桩7个,寻找遗漏根管11个,修补根管侧壁穿孔6个,发现根管内吸收1个,根尖封闭10个,成功完成56颗患牙(62个根管)再治疗。结论:显微超声技术在疑难根管再治疗中可以提供有效的治疗手段,提高临床治疗成功率。%Objective:To evaluate the effect of dental operating microscope(DOM) and ultrasonic instruments in the management of complicated root canals. Method:56 teeth (62 root canals)that had been treated with convention repaired before were selected for root canal therapy. The root canal of all cases were retreated with ultrasonic instruments under den-tal operating microscope. The efficient of preparation and obturation was analyzed before and after treatment. Result:The 21 calcified root canals,6 canals blocked by instrument fragments,7 canals blocked by post,11 misunderstood root canals,6 canals side hole,1 root canal absorb inside,10 canals with open canal system were retreated successfully. Conclusion:The use of dental operating microscope and ultrasonic instruments is proved effective in complicated tooth root canal retreatment.

  10. Restoring Anterior Aesthetics by a Rotational Path Cast Partial Denture: An Overlooked Technique.

    Science.gov (United States)

    Sharma, Deeksha; Bhat, Bala Saraswati; Arora, Himanshu

    2016-05-01

    Cast Partial Dentures (CPD) has long been known to restore missing teeth in patients with minimal invasion on hard and soft tissues. Although satisfactory otherwise, the main concern in CPD is the anterior display of metal. Also the technique sensitive lab procedures, together with the esthetic concern have built an iceberg around the frequent utilization of this treatment modality. With the advent of various techniques to get rid of the metallic display, it was predicted to have more CPD's done in the dental arena. But the conceptual technicalities of the procedure took away the limelight from this treatment modality and focused on the fixed prosthodontics. Although feasible in a large number of patients, fixed prosthesis still has areas of restriction. It is here, when we apply our knowledge and skill of esthetic CPD. Esthetic CPD eliminates the metal display by utilizing desirable undercuts. The engaging action of the framework into these undercuts paves way for a rotational motion to seat the remaining prosthesis. Hence dual path of insertion helps eliminating the anterior clasp. In this case report dual path of insertion is discussed for replacing anterior teeth in an old male patient who had mild esthetic concerns. Following the conservative approach of CPD (over FPD) esthetic and restorative treatment was planned with patient's consent. PMID:27437375

  11. Four year's clinical evaluation of glass fiber reinforced resin-bonded fixed partial denture as a periodontal splint to replace lost anterior teeth%玻璃纤维增强复合树脂牙周夹板粘接修复前牙缺失的四年临床观察

    Institute of Scientific and Technical Information of China (English)

    肖遵胜; 姜婷; 方晓倩; 吕品; 李健; 贾璐

    2016-01-01

    目的 评价玻璃纤维增强复合树脂粘接义齿修复前牙缺失的临床存活率并分析其影响因素.方法 选择1~3颗前牙缺失、缺牙区邻牙牙周支持丧失严重、不符合种植义齿及全冠固位固定义齿修复条件的30例患者,制作玻璃纤维(Everstick C&B)增强复合树脂粘接义齿30个.采用树脂粘接系统(Superbond C&B)进行粘接固定修复.在修复即刻、修复后1、2、3、4年分别对义齿的完全存活率、功能存活率、基牙牙槽骨高度进行记录和评估,分析失败原因.采用完全随机的单因素方差分析及卡方检验分析基牙骨高度变化.结果 修复1~3年后,每年分别出现义齿连接体折裂1例,经过树脂修补后继续使用.第3、4年各有1例连接体再次折裂后义齿整体脱落.4年随诊后,30例玻璃纤维增强复合树脂粘接义齿的完全存活率为83% (25/30),功能存活率为93% (28/30).22% (13/60)的邻牙骨高度降低,而另外78% (47/60)的邻牙骨高度增加,与修复后第1年相比差异有统计学意义(P<0.05),邻牙牙周状况得到改善.结论 4年临床观察显示,对于1~3颗前牙缺失合并邻近基牙牙周支持受损的患者,玻璃纤维增强复合树脂粘接义齿是一种可行的固定修复方式.%Objective To evaluate the clinical performance of glass fiber reinforced resin-bonded fixed partial denture(GFR-RBFPD) as a periodontal splint on abutment teeth with reduced periodontal support.Methods Thirty fixed-fixed GFR-RBFPD were delivered to restore anterior partial edentulous dentitions.The adjacent abutment teeth had severely reduced periodontal support and were not indicated for full crown retained FPD.The success rate and functional survival rate had been recorded and the periodontal condition had been evaluated for 4 years.The results were statistically analyzed with single factor variance analysis and chi square test(α=0.05).Results In the first,second,and third year following

  12. About Kids' Teeth

    Science.gov (United States)

    ... for tooth decay and gum disease. Good oral hygiene is especially important for people wearing braces. And ... bottle pool around the teeth while the child sleeps. Bacteria in the mouth use these sugars as ...

  13. Malocclusion of teeth

    Science.gov (United States)

    ... are easier to clean and decrease risk of tooth decay and periodontal diseases ( gingivitis or periodontitis ). Eliminate strain ... braces and may permanently mark teeth or cause tooth decay if not properly cared for. You will need ...

  14. Taking Care of Your Teeth

    Science.gov (United States)

    ... teeth are important in many ways. If you take care of them, they'll help take care of you. Strong, healthy teeth help you chew ... have some baby teeth? If you don't take care of your teeth, cavities and unhealthy gums will ...

  15. A Spectrophotometric Color Evaluation of Natural Teeth and Gingival

    DEFF Research Database (Denmark)

    Peng, Min; Hosseini, Mandana; Gotfredsen, Klaus

    2012-01-01

    Objectives: The aim of the present study was to evaluate the color of natural teeth and gingival in anterior maxillary using a new spectrophotometer. Materials and Methods: Thirty four patients with 52 healthy natural teeth and gingival in anterior maxillary were recruited. The color at four...... positions of each tooth (incisal 1/3, body1/3, cervical 1/3 and gingival) were assessed using a spectrophotometer (SpectroShadeTM, Micro Dental, Seria No. HDL3214, MHT, S.p.A, Italy) in CIELab coordinates. Descriptive statistics of Spss17.0 was used to analyze the distribution of color coordinates. Pearson...... correlation was used to test the relationship between the coordinates and age. Independent t test was used to test the difference between gender groups. Results: All the color coordinates for teeth and gingival were in right-left symmetric distribution by the central incisors and the distribution was in same...

  16. Supernumerary teeth in clinical practice

    Directory of Open Access Journals (Sweden)

    Anna K. Szkaradkiewicz

    2011-07-01

    Full Text Available Introduction: Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of teeth. The prevalence rates of supernumerary teeth in the permanent dentition amounts 0.1-6.9%, and in deciduous dentition 0.4-0.8%. The presence of supernumerary teeth can be found in everyday dental practice.Case presentation: We describe 3 cases of patients with supernumerary teeth. First patient had supernumerary lateral incisor 12s, second - premolar fused, multicuspid, supernumerary deciduous tooth 64s of having several interconnected roots, and third - erupted odontoma between teeth 13 and 14. In all cases treatment involved the removal of the supernumerary tooth.Conclusions: The decision on proceeding with the supernumerary teeth should be based on the full clinical picture and interview. Early diagnosis and removal of supernumerary teeth allow to avoid or reduce possible complications.

  17. Anterior tarsaltunnelsyndrom

    DEFF Research Database (Denmark)

    Miliam, Palle B; Basse, Peter N

    2009-01-01

    Anterior tarsal tunnel syndrome is a rare entrapment neuropathy of the deep peroneal nerve beneath the extensor retinaculum of the ankle. It may be rare because it is underrecognized clinically.We present a case regarding a 29-year-old man, drummer, who for one and a half year experienced clinical...

  18. To compare the stability of stainless mini-implants retracting maxillary anterior teeth in two different implanted sites%不锈钢种植钉支抗内收上颌前牙时两种植入部位稳定性的比较

    Institute of Scientific and Technical Information of China (English)

    彭绍斌; 文民; 程超; 裘军; 秦韶宏; 金树人

    2015-01-01

    Objective To compare the stability of stainless mini-implants retracting maxillary anterior teeth in two different implanted sites.Methods 72 patients (28 males,44 females) of maxillary protrusion were selected to retract anterior teeth with stainless mini-implants anchorage.14 males and 22 females were bucally implanted between maxillary second premolar and first molar.The other 14 male and 22 female were bucally implanted between first and second molars.The failure rates of mini-implants in two different implanted sites were compared.Results Group of implants bucally located between maxillary second premolar had a 23.38% failure rate.Group of implants bucally located between maxillary first and second molars had a 6.74% failure rate.The difference was statistically significant(P=0.002).Conclusions The stability of stainless mini-implants anchorage between maxillary first and second molars,is better than that of bucally located implants between maxillary seond premolar and first molar.%目的 比较使用不锈钢种植钉支抗内收上颌前牙时,两种不同植入部位种植钉的稳定性.方法 选取因上颌前突而行拔牙矫治的患者72例,其中男性28例,女性44例,均使用不锈钢种植钉支抗技术内收上颌前牙.对其中14例男性、22例女性患者于上颌5、6间颊侧植入种植钉,对另14例男性、22例女性患者于6、7间颊侧植入种植钉.比较两种不同植入部位种植钉的松动率.结果 两种不同植入部位种植钉松动率的比较,位于上颌5、6间颊侧植入组,松动率为23.38%,位于6、7间颊侧植入组,松动率为6.74%,前者松动率高于后者,其差异有统计学意义(P=0.002).结论 使用不锈钢种植钉支抗内收上颌前牙时,植入于上颌6、7间颊侧,种植钉稳定性优于植入于上颌5、6间颊侧.

  19. 玻璃纤维桩经表面喷砂后修复上前牙缺损的随访观察%Effect of surface sandblasting of the glass-fiber post on the restoration of upper anterior teeth

    Institute of Scientific and Technical Information of China (English)

    翁志强; 毛钊; 徐辉; 金磊; 唐成忠; 李益材; 严晓东; 冷旭

    2011-01-01

    目的 良好的固位是纤维桩修复成功的关键之一,有研究指出表面喷砂处理可提高纤维桩的固位力,文中探讨玻璃纤维桩表面喷砂处理后修复上前牙牙体缺损的临床疗效.方法 选择上前牙牙体严重缺损需行桩冠修复的患者132例共计156颗牙,随机分为2组,A组82牙为喷砂组,采用表面经过70μm/0.2MPa条件下Al2O3喷砂处理后的纤维桩进行桩冠修复;B组74牙为对照组,用未经喷砂处理的纤维桩修复.2组分别同时进行3个月至3年的临床随访观察.结果 2组桩脱落的发生率存在显著性差异(P<0.05),而桩折断的发生率未见有显著差别(P>0.05);运用Kaplan-Meirer生存曲线和log-rank检验揭示2组间纤维桩脱落的Kaplan-Meirer生存曲线差异有统计学意义(P<0.05),而2组间桩折断的生存曲线未发现显著差异(P>0.05).结论 用Al2O3 在70μm/0.2MPa条件下对纤维桩表面进行喷砂处理后,可提高固位力,延长桩的使用时间,而对桩的强度影响较小.%Objective Retention of the fiber post is one of the key issues to successful restoration. Recently some studies found that surface sandblasting might improve the binding strength of resin composite to fiber posts. This study was designed to evaluate the clinical effect of surface sandblasting on the retention of the glass-fiber post in restoring upper anterior teeth. Methods A total of 132 patients (156 anterior teeth) were chosen and randomly divided into 2 groups. Group A ( N = 82) was restored with glass-fiber posts sandblasting with Al2 O3, under the condition of 70 μ m/0. 2 MPa , group B ( N = 74) was treated without surface sandblasting ( the control group). FoUow-up observations were done every 3 months to 3 years after the post and core restorations had been finished. Results By X2 analysis, the difference of dislocation rate was significant statistically between the 2 groups (P < 0. 05) , while the fracture rate was not different

  20. Periodontal conditions of teeth presenting pathologic migration Condições periodontais de dentes com migração dentária patológica

    OpenAIRE

    Maurício Ribeiro Costa; Karina Gonzales Silvério; Carlos Rossa Júnior; Joni Augusto Cirelli

    2004-01-01

    The aim of the present study was to evaluate the periodontal conditions of anterior teeth that presented pathologic migration in patients with chronic periodontitis and to compare periodontal destruction in migrated versus non-migrated teeth. The sample included 32 patients of both sexes (mean age: 46.0 ± 11.6 years) diagnosed with generalized chronic periodontitis and selected on the basis of the presence of pathologic migration in one or more anterior teeth. This migration was classi...

  1. Fine structure of the mineralized teeth of the chiton Acanthopleura echinata (Mollusca: Polyplacophora).

    Science.gov (United States)

    Wealthall, Rosamund J; Brooker, Lesley R; Macey, David J; Griffin, Brendan J

    2005-08-01

    The major lateral teeth of the chiton Acanthopleura echinata are composite structures composed of three distinct mineral zones: a posterior layer of magnetite; a thin band of lepidocrocite just anterior to this; and apatite throughout the core and anterior regions of the cusp. Biomineralization in these teeth is a matrix-mediated process, in which the minerals are deposited around fibers, with the different biominerals described as occupying architecturally discrete compartments. In this study, a range of scanning electron microscopes was utilized to undertake a detailed in situ investigation of the fine structure of the major lateral teeth. The arrangement of the organic and biomineral components of the tooth is similar throughout the three zones, having no discrete borders between them, and with crystallites of each mineral phase extending into the adjacent mineral zone. Along the posterior surface of the tooth, the organic fibers are arranged in a series of fine parallel lines, but just within the periphery their appearance takes on a "fish scale"-like pattern, reflective of the cross section of a series of units that are overlaid, and offset from each other, in adjacent rows. The units are approximately 2 microm wide and 0.6 microm thick and comprise biomineral plates separated by organic fibers. Two types of subunits make up each "fish scale": one is elongate and curved and forms a trough, in which the other, rod-like unit, is nestled. Adjacent rod and trough units are aligned into large sheets that define the fracture plane of the tooth. The alignment of the plates of rod-trough units is complex and exhibits extreme spatial variation within the tooth cusp. Close to the posterior surface the plates are essentially horizontal and lie in a lateromedial plane, while anteriorly they are almost vertical and lie in the posteroanterior plane. An understanding of the fine structure of the mineralized teeth of chitons, and of the relationship between the organic and

  2. Estimating Gear Teeth Stiffness

    OpenAIRE

    Pedersen, Niels Leergaard

    2013-01-01

    The estimation of gear stiffness is important for determining the load distribution between the gear teeth when two sets of teeth are in contact. Two factors have a major influence on the stiffness; firstly the boundary condition through the gear rim size included in the stiffness calculation and secondly the size of the contact. In the FE calculation the true gear tooth root profile is applied. The meshing stiffness’s of gears are highly non-linear, it is however found that the stiffness of ...

  3. Impacted Teeth and Mandibular Fracture

    OpenAIRE

    Metin, Murat; Şener, İsmail; Tek, Mustafa

    2007-01-01

    Objectives In this retrospective study, we measured the relationship between the presences of impacted or unerupted teeth in the mandible and mandibular fractures. Methods The records and radiographs of 41 patients with mandibular fracture associated with impacted or unerupted teeth were examined. The presence of impacted or unerupted teeth were assessed for each patient and related to the occurrence of fractures of mandible. Results Patients with fracture in the impacted or unerupted teeth a...

  4. Aesthetic approach for anterior teeth with enamel hypoplasia

    OpenAIRE

    Josué Martos; Andréa Gewehr; Emanuele Paim

    2012-01-01

    Enamel hypoplasia is a developmental defect of the enamel that is produced by a disturbance in the formation of the organic enamel matrix, clinically visible as enamel defects. Disorders that occur during the stages of enamel development and maturation reduce the amount or thickness of the enamel, resulting in white spots, tiny grooves, depressions and fissures in the enamel surface. The complexity and intensity of the dental deformity lesions will conduct the ideal treatment-associating cons...

  5. 上颌前牙区不翻瓣即刻牙种植术对患者口腔内软硬组织的影响分析%Analysis of Maxillary Anterior Teeth Area Flapless Dental Implants Immediately to Soft and Sclerous Tissue in the Mouth

    Institute of Scientific and Technical Information of China (English)

    刘伟林

    2015-01-01

    Objective:To study maxillary anterior teeth area flapless dental implants immediately to soft and sclerous tissue in the mouth .Method:From Mar.2010 to Mar.2013 in our hospital with surgery treat-ment of front teeth or premoLar repair patients 100 cases as the research object .In digital method of 50 cases was randomly divided into observation group and control group of 50 cases.The control group was treated with flap of immediate implant surgery , while the observation group was treated with flapless dental implants im-mediately surgery , statistics and compared two groups of postoperative overall situation , sclerous and soft tis-sue following surgery , and PES grading and VAS score before and after the treatment .Result:The postoper-ative pain and swelling of 1 day ratio in observation group were significantly lower than the control group , and 12 months after gingival papilla index proportion was significantly higher than the control group , differences were statistically significant (all P 0.05) .Observation group of 12 months after the operation of the crest of absorption value was significantly less than the control group;the difference was statistically significant ( P 0.05) .PES rating of the two groups after treatment , and VAS scores were raising before the treatment , but the rising degree of observation group was significantly higher than the control group, the difference was statistically significant (P <0.05).Conclusion: Maxillary anterior teeth area flapless dental implants immediately , curative effect is better , which has more aesthetic feeling , is worth promoting .%目的:研究分析上颌前牙区不翻瓣即刻牙种植术对患者口腔内软硬组织的影响。方法:选择2010年3月至2013年3月在我院接受手术治疗的前牙或者前磨牙修复患者100例作为研究对象。以数字法随机分成观察组50例以及对照组50例。对照组实施翻瓣的即刻牙种植手术,观察组则实施不翻瓣的即刻牙

  6. Fracture resistance of maxillary anterior teeth with flared root canals restored with fiber posts by 3 me-thods%纤维桩不同修复方法对薄弱根管抗折性能影响的实验研究

    Institute of Scientific and Technical Information of China (English)

    左恩俊; 牛卫东; 马国武; 胡书海

    2015-01-01

    Objective:To investigate the influence of 3 methods of fiber posts on fracture resistance of maxillary anterior teeth with flared root canals.Methods:32 human maxillary central incisors were assigned randomly to 4 groups(n =8).The crowns of the teeth were removed at a level 2 mm incisal to the cementoenamel junction(CEJ).After root canal therapy,flared canals were simula-ted in 3 groups.The flared canals were reinforced with resin cement(group A),resin composite(group B)and accessory posts (group C)respectively.In group D flared canals were not created.The same size fiber posts were cemented with resin cement in all groups.After posts cementation and composite resin core formation,all teeth were restored with metal crowns.Then the roots of the teeth were embedded in acrylic resin blocks up to 2 mm below the CEJ.The samples were loaded in a testing machine until failure occurred.Results:The maximum load value(N)for fracture of group A,B,C and D was 295.94 ±69.11,450.51 ±54.68, 479.37 ±77.81 and 618.51 ±87.42 respectively(F =118.127,P =0.000);group B vs C,P >0.05,between each 2 of the other groups,P 0.05). Conclusion:Reinforcement of flared canal with resin composite and accessory posts can increase the fracture restance of the tooth root and the most of fracture patterns are beneficial for the second repair.%目的:探讨纤维桩不同修复方法对薄弱根管抗折性能的影响。方法:将32颗离体上颌中切牙随机分为 A、B、C、D 4组(n =8)。将 A、B、C 组牙预备成漏斗状薄弱根管,采用纤维桩3种不同的修复方法修复;D 组为对照组,采用正常根管预备,用单根纤维桩复合树脂核修复。桩核修复后,4组均行铸造金属全冠修复。在电子万能试验机上持续加载至试样牙发生折裂。记录折裂时的加载载荷和折裂模式。结果:A、B、C、D 组的断裂载荷(N)分别为295.94±69.11、450.51±54.68、479.37±77.81、618.51±87.42(F

  7. Clinical management of supernumerary teeth: A report of two cases

    Directory of Open Access Journals (Sweden)

    Mittal M

    2010-09-01

    Full Text Available Supernumerary tooth may closely resemble the teeth of the group to which it belongs, i.e. molars, premolars or anterior teeth, or it may bear little resemblancein size or shape to which it is associated. Many complications can be associated with supernumeraries, like impaction, delayed eruption or ectopic eruption of adjacent teeth, crowding, development of median diastema and eruption into floor of the nasal cavity. This may also cause the formation of follicular cysts with significant bone destruction. Early intervention to remove it is usually required to obtain reasonable alignment and occlusal relationship. This article will present the clinical management of an (i impacted supernumerary tooth impeding the eruption of maxillary central incisor and (ii erupted supernumerary tooth with midline diastema.

  8. The dynamic relationship between pathological migrating teeth and periodontal disease

    OpenAIRE

    Rathod, Surekha R; Kolte, Abhay P; Snehal Chintawar

    2013-01-01

    Background: Pathologic migration is defined as change in tooth position resulting from disruption of the forces that maintain teeth in normal position in relation to their arch. The disruption of equilibrium in tooth position may be caused by several etiologic factors. So, the aim of the study was to evaluate the pathologic tooth migration (PTM) in the upper anterior sextant and its relationship with predisposing and external factors such as bone loss, tooth loss, gingival inflammation, age, ...

  9. Talon Cusp in Maxillary Permanent Incisor Teeth: Case Report

    OpenAIRE

    YAPAR, Arş. Gör. Dt. Merve İŞCAN; İLDAY, Yrd. Doç. Dr. Nurcan ÖZAKAR; ÇAĞLAYAN, Yrd. Doç. Dr. Fatma; NilgünSEVEN, Prof. Dr.

    2013-01-01

    Talon cusp is an uncommon developmental dental anomaly referring to an accessory cusp projecting from the cingulum area, or cemento-enamel junction of maxillary or mandibular anterior teeth, in both the primary and permanent dentition. The etiology of talon cusp is not well understood , but appears to have both genetic and environmental components. Permanent dentition have been involved three times more often than the primary dentition. This anomalous cusp may or may not cantain pulpal tissue...

  10. Comparison of removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid and citric acid in primary teeth: A scanning electron microscopic study

    OpenAIRE

    Hegde, Rahul J.; Kavita Bapna

    2016-01-01

    Background: Root canal irrigants are considered momentous in their tissue dissolving property, eliminating microorganisms, and removing smear layer. The present study was aimed to compare the removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid (EGTA) and citric acid solutions with saline as a control in primary anterior teeth. Materials and Methods: Thirty primary anterior teeth were chosen for the study. The teeth were distribute...

  11. Take Care of Your Child's Teeth

    Science.gov (United States)

    ... Your Child’s Teeth Print This Topic En español Take Care of Your Child’s Teeth Browse Sections The Basics ... important. Baby teeth hold space for adult teeth. Take care of your child’s teeth to protect your child ...

  12. Carisolv as an endodontic irrigant in deciduous teeth: An SEM study

    OpenAIRE

    Parul Singhal; Usha Mohan Das; Deepak Vishwanathan; Anita Singhal

    2012-01-01

    Aim: Root canal irrigation plays an important role in the debridement and disinfection of the root canal system. "The purpose of this study was to evaluate the efficacy of Carisolv TM , 1% sodium hypochlorite (NaOCl) gel, and 1% NaOCl solution as root canal irrigants in deciduous anterior teeth." Materials and Methods: Thirty-six extracted deciduous anterior teeth were used. Root canals were flooded with NaOCl solution in Group A, NaOCl gel in Group B and Carisolv TM in Group C and incuba...

  13. Multiple supernumerary teeth and odontoma in the maxilla: A case report

    Directory of Open Access Journals (Sweden)

    P B Sood

    2010-01-01

    Full Text Available Most supernumerary impacted teeth are located in the anterior maxillary region. They are classified according to their form and location. Their presence may give rise to a variety of clinical problems. The detection of supernumerary teeth is best achieved by thorough clinical and radiographic examination. Their management should form part of a comprehensive treatment plan. This article presents an overview of the diagnostic problems associated with multiple supernumerary impacted teeth and includes a discussion of the classification, diagnosis, and management of this difficult clinical entity.

  14. Polycarbonate crowns for primary teeth revisited: restorative options, technique and case reports.

    Science.gov (United States)

    Venkataraghavan, Karthik; Chan, John; Karthik, Sandhya

    2014-01-01

    Esthetics by definition is the science of beauty - that particular detail of an animate or inanimate object that makes it appealing to the eye. In the modern, civilized, and cosmetically conscious world, well-contoured and well-aligned white teeth set the standard for beauty. Such teeth are not only considered attractive but are also indicative of nutritional health, self esteem, hygienic pride, and economic status. Numerous treatment approaches have been proposed to address the esthetics and retention of restorations in primary teeth. Even though researchers have claimed that certain restorations are better than the others, particularly owing to the issues mentioned above, the search for the ideal esthetic restoration for the primary teeth continues. This paper revisits and attempts to reintroduce the full coverage restoration, namely, polycarbonate crown, for use in primary anterior teeth. PMID:24739917

  15. Polycarbonate crowns for primary teeth revisited: Restorative options, technique and case reports

    Directory of Open Access Journals (Sweden)

    Karthik Venkataraghavan

    2014-01-01

    Full Text Available Esthetics by definition is the science of beauty - that particular detail of an animate or inanimate object that makes it appealing to the eye. In the modern, civilized, and cosmetically conscious world, well-contoured and well-aligned white teeth set the standard for beauty. Such teeth are not only considered attractive but are also indicative of nutritional health, self esteem, hygienic pride, and economic status. Numerous treatment approaches have been proposed to address the esthetics and retention of restorations in primary teeth. Even though researchers have claimed that certain restorations are better than the others, particularly owing to the issues mentioned above, the search for the ideal esthetic restoration for the primary teeth continues. This paper revisits and attempts to reintroduce the full coverage restoration, namely, polycarbonate crown, for use in primary anterior teeth.

  16. Application of computed tomography for supernumerary teeth location in pediatric dentistry.

    Science.gov (United States)

    Raupp, Suziane; Kramer, Paulo Floriani; de Oliveira, Helena Willhelm; da Rosa, Francinne Miranda; Faraco, Italo Medeiros

    2008-01-01

    Conventional radiographs provide bi-dimensional images of three-dimensional structures limiting optimal treatment planning. To overcome this deficiency, Computed Tomography (CT) has been used as a diagnostic method in Medicine and Dentistry. CT allows for supernumerary teeth location, the establishment of positional relations with other teeth, and the assessment of surrounding bone thickness; thus, facilitating surgical access and technique choice while reducing the procedure time, of great importance in pediatric dental care. The aim of this study was to present the possibility of applying CT for supernumerary teeth location, through the case report of a five-year-old female patient presenting two supernumerary teeth in the anterior palatal area. In conclusion, CT appears to be an excellent image diagnostic method for locating unerupted supernumerary teeth, providing precise information for planning and performing the surgical approach, while reducing operatory time and post-operatory complications; factors of extreme importance when treating young children. PMID:18767456

  17. Sterilization of Extracted Human Teeth.

    Science.gov (United States)

    Pantera, Eugene A., Jr.; Schuster, George S.

    1990-01-01

    At present, there is no specific recommendation for sterilization of extracted human teeth used in dental technique courses. The purpose of this study was to determine whether autoclaving would be effective in the sterilization of extracted teeth without compromising the characteristics that make their use in clinical simulations desirable. (MLW)

  18. Taking Care of Your Teeth

    Science.gov (United States)

    ... important to keeping teeth healthy. When you eat sugary foods or drink sodas frequently throughout the day, the enamel that protects your teeth is constantly exposed to acids. Hard candies, cough ... foods containing sugar. Sugary or starchy foods eaten with a meal are ...

  19. Notching and anterior beveling on fossil horse incisors: Indicators of domestication?

    Science.gov (United States)

    Rogers, Richard A.; Rogers, Laurine A.

    1988-01-01

    One of the lines of evidence cited for possible late Pleistocene human control of horses has been the presence of notching and anterior beveling on horse incisor teeth recovered from upper and middle Paleolithic sites in Europe. Similar forms of wear have been found on the incisor teeth of wild horses from early and middle Pleistocene deposits in North America. Notching appears partly due to malocclusion and chipping. The causes of beveling are less certain but may involve the eating of bark. Therefore, the presence of notching and anterior beveling on horse incisor teeth may not be a reliable indicator of human control.

  20. Effects of the marginal position of porcelain fused metal crown on beauty and periodontal health for anterior teeth%不同金瓷冠边缘位置对前牙区美容和牙周健康的影响

    Institute of Scientific and Technical Information of China (English)

    张志慧

    2015-01-01

    Objective To explore the influence of the marginal position of porcelain fused metal crown on beauty and periodontal health for anterior teeth. Methods 96 patients were treated by porcelatin fused metal crowns and were randomly divided into three groups. According to the difference in the marginal position of the crown patients were with crown margins up the gingival level,at the gingival level and under the gingival level.The degee of satisfaction,gingival crevicular fluid volume (GCF) , aspartate(AST) and alkaline phosphatase(ALP) were investigated at 1-month,3-month and 6-month after premanent restoration. Results The satisfaction survey of under the gingival level group and at the gingival level group were higher than up the gingival level group's.There was significant statistically difference. Conclusion Based on the results of this study, the crown with gingival margin at gingival level is better than others.Crown margin at gingival level should been chosen at most times by dentists.%目的:探讨不同冠边缘设计对前牙区金瓷全冠修复患者的美观和牙周健康的影响。方法:选择需进行金属熔附烤瓷全冠修复病例96例,随机分成3个治疗组,根据冠的颈缘位置不同分别采用龈上冠边缘修复、平龈冠边缘修复和龈下冠边缘修复,调查3组患者全冠戴入后患者美观满意度,检测全冠戴入后龈沟液量及AST、ALP活性的变化。结果:龈下冠边缘修复和平龈冠边缘修复组患者美观满意度明显较龈上冠边缘修复组高;龈上冠边缘修复和平龈冠边缘修复组患者对牙周损伤明显较龈下冠边缘修复组低,差异均具有统计学意义(P<0.05)。结论:全冠平龈冠边缘修复设计既不影响患者对美观方面的需求,又对龈沟液的影响较小,优于龈上冠边缘修复和龈下冠边缘修复,不考虑其他影响因素时,临床应优先选择。

  1. How Acid Reflux Disease Damages Teeth

    Science.gov (United States)

    ... more Seniors' Oral Health How to Keep Your Teeth for a Lifetime Tooth loss is simply the ... your desktop! more... How Acid Reflux Disease Damages Teeth Article Chapters How Acid Reflux Disease Damages Teeth ...

  2. Triple Teeth: Report of an Unusual Case

    OpenAIRE

    Prashant Babaji; M. A. Prasanth; Ajith R. Gowda; Soumya Ajith; Henston D'Souza; Ashok, K. P.

    2012-01-01

    Fusion or synodontia is a union of two or more than two developing teeth. Commonly fusion occurs between teeth of the same dentition, mixed dentition, or between normal and supernumerary teeth. Fused primary teeth present with several clinical problems like caries, periodontal problem, arch asymmetry, delayed eruption, ectopic eruption of succedaneous teeth, aesthetic, and other complications. This paper presents a rare and unusual case of triple teeth in mandibular primary dentition.

  3. Supernumerary Teeth in Nepalese Children

    Directory of Open Access Journals (Sweden)

    Varun Pratap Singh

    2014-01-01

    Full Text Available Objective. The objectives of the present study were to investigate the prevalence and characteristics of supernumerary teeth in a patient sample of Nepalese children. Study Design. A survey was performed on 2684 patients (1829 females and 1035 males ranging in age from 6 to 14 for the presence of supernumerary teeth. For each patient with supernumerary teeth the demographic variables (age and sex, number, location, eruption status, and morphology were recorded. Descriptive statistics were performed. Results. Supernumerary teeth were detected in 46 subjects (1.6%, of which 26 were males and 20 were females with a male : female ratio of 1.3 : 1. The most commonly found supernumerary tooth was mesiodens followed by maxillary premolars, maxillary lateral incisor, and mandibular lateral incisor. Of the 55 supernumerary teeth examined, 58.18% (n=32 had conical morphology, followed by tuberculate (30.90%, n=17 and supplemental (10.90%, n=6 forms. The majority of the supernumerary teeth were erupted (56.36%, n=31. Conclusion. The prevalence of supernumerary teeth in Nepalese children was found to be 1.6%, the most frequent type being mesiodens. Conical morphology was found to be the most common form of supernumerary tooth.

  4. Phacoemulsification in anterior megalophthalmos.

    Science.gov (United States)

    Lee, Graham A; Hann, Joshua V; Braga-Mele, Rosa

    2006-07-01

    This case outlines the phacoemulsification technique used to overcome the challenge of the hyperdeep anterior chamber, weak zonules, abnormal anterior capsule, and large capsular bag. Key steps included trypan blue staining of the anterior capsule, a large capsulorhexis, prolapse of the nucleus into the anterior chamber with phacoemulsification anterior to the capsulorhexis, and a posterior chamber-placed iris-clip intraocular lens. Successful visual rehabilitation is achievable in these anatomically challenging eyes. PMID:16857490

  5. Surgical management of multiple supernumerary teeth and an impacted maxillary permanent central incisor.

    Science.gov (United States)

    Rallan, Mandeep; Rallan, Neelakshi Singh; Goswami, Mousumi; Rawat, Kamini

    2013-01-01

    Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of teeth. It is a developmental anomaly and has been argued to arise from multiple aetiologies. The most common site is the maxillary incisor region; but the prevalence of more than three teeth supernumerary tooth is less than 1%. A case of 13 year male patient is reported with a multiple impacted supernumerary tooth in maxillary anterior region hindering the eruption of right permanent central incisor. The supernumerary tooth was treated via surgical approach followed by an interim prosthesis for permanent central incisor which later on erupted in due course of time. Background Supernumerary teeth may be defined as any teeth or tooth substance in excess of the usual configuration of 20 deciduous and 32 permanent teeth. The presence of supernumerary teeth in the premaxillary region often poses unique diagnostic and managerial concerns for the practitioner. Rarely is the surplus number compensated by an absence or deficiency of other teeth. Therefore, the dysfunctional nature of supernumerary teeth and their ability to create a variety of pathological disturbances in the normal eruption and position of adjacent teeth warrants their early detection and prudent management. Approximately 76-86% of cases represent single-tooth hyperdontia, with two supernumerary teeth noted in 12-23% and three or more extra teeth noted in less than 1% of cases. Multiple supernumerary teeth are also associated with many syndromes like cleidocranial dysplasia and Gardner’s syndrome etc. However, it is rare to find multiple supernumeraries in individuals with no other associated disease or syndrome. In such cases, the maxillary anterior region is the common site of occurrence. The exact aetiology is not clearly understood. The supernumerary teeth result from any disturbance in the initiation and proliferation stages of odontogenesis. There are several theories regarding the

  6. Teeth white and fair.

    Science.gov (United States)

    Reed, R V

    1998-03-01

    Most dentists practicing today, in fact most dentists living today, accept porcelain, in one form or another, as a fundamental determinant of dental armamentarium. It must be remembered, however, that porcelain, in spite of some admonishments by the Chicken Littles, has not and is not about to fall like the sky. A great amount of purpose, intellect, and dedication proffered by porcelain's protagonists was the springboard that eventually led to near total acceptance of that product by dentists and the public they treated. Porcelain's introduction, however, was not accompanied by a professional unity that orchestrated its arrival with a blare of bugles and a ruffle of drums. Rather, the early proponents and opponents churned and swiped at each other for some decades. Teeth White and Fair recounts the origin, struggle, and growth of an early porcelain manufacturing company; the diversity of the men involved in the production of porcelain; the profession's dichotomy regarding the acceptance of porcelain; and the details of manufacture of that then embryonic dental product. Finally, the reader is given a peek at evolving cosmetic oriented materials that desire to garner ascension as valued players on the stages of cosmetic dental restorative materials. PMID:9709660

  7. [Epidemiology of teeth hypersensitivity].

    Science.gov (United States)

    Lutskaia, I K; Zinovenko, O G; Kovalenko, I P

    2015-01-01

    A clinical examination of 98 patients aged 20 to 75 years was carried out to identifyclinical and epidemiological features of hard tooth tissueshypersensitivity. The survey found out what stimuli (cold, hot, sour, mechanical, chemical) cause the appearance of dental hyperesthesia. The detailed survey of the affected area aimed to determine the presence of dental caries, gingival recession, wedge-shaped defects, erosions, microcracks and chipped enamel, as well as wear of the tooth crown. Forty-threepatients of 98 (43.88%) had tooth sensitivity. Most affected age group was 25-34 years (33%). Among patients studied with hyperesthesia 86% complained of pain. It was establishedthat dental hyperesthesia most often causes an intense, but quickly passing pain response, wherein upon exposure of several types of stimuli. Teeth with high sensitivity showed signs of abrasion (74.1%), most often--on the vestibular surface (44.4%). Patients under 45 years had notable cracks and wedge-shaped defects. In patients 45 years and older cracks and increased abrasion of hard dental tissues was seen. PMID:26271696

  8. PERIAPICAL HEALTH AND CORONARY RESTORATION QUALITY OF ROOT-FILLED TEETH IN THE TURKISH POPULATION

    Directory of Open Access Journals (Sweden)

    E. Bodrumlu

    2012-09-01

    Full Text Available Objective: The purpose of this study was to compare the quality of coronary restorations and root canal fillings with the periapical status of root-filled teeth, in a subpopulation of Turkish individuals. Method: The study included 18,210 randomly selected, 20- to 70-year-old patients referred to the Dental Faculty of Ondokuz Mayis University. A total number of 1,027 root-filled teeth from 780 patients (645 females, 382 males matched these criteria. Additionally, the radiographs were separated according to the age and gender of patients. Panoramic radiographies compared the quality of coronary restorations and root canal fillings with the periapical status of root-filled teeth. Results: The most numerous root-filled teeth were observed in the 20- to 29-year-old group, in both genders. For the maxillary and mandibular incisive teeth, the prevalence of inadequate coronary restoration with apical periodontitis (AP is 29.04% in males and 70.96%, respectively, in females (p<0.05. For the posterior teeth, in both jaws, the prevalence of inadequate coronary restoration with AP is 38.99% in males and 61.02%, respectively, in females. The AP prevalence in inadequate coronary restorations was significantly higher for the posterior than for the anterior teeth. Conclusion: This study concludes that adequate coronary restorations and crowned root-filled teeth significantly reduce AP incidence.

  9. Genetic background of supernumerary teeth

    OpenAIRE

    Subasioglu, Asli; Savas, Selcuk; Kucukyilmaz, Ebru; Kesim, Servet; Yagci, Ahmet; Dundar, Munis

    2015-01-01

    Supernumerary teeth (ST) are odontostomatologic anomaly characterized by as the existence excessive number of teeth in relation to the normal dental formula. This condition is commonly seen with several congenital genetic disorders such as Gardner's syndrome, cleidocranial dysostosis and cleft lip and palate. Less common syndromes that are associated with ST are; Fabry Disease, Ellis-van Creveld syndrome, Nance-Horan syndrome, Rubinstein-Taybi Syndrome and Trico–Rhino–Phalangeal syndrome. ST ...

  10. A RARITY–CASES OF NATAL TEETH

    OpenAIRE

    Wairokpam Bhoomika; Ramakrishna; Oinam Joychandra; Mousumi

    2013-01-01

    ABSTRACT: Prematurely erupted teeth present at birth have been described as “natal teeth/ congenital teeth or fetal teeth”. Such teeth are of great concern to the parent because of several superstitions and beliefs. Other related inconvenien ces or dangers to the infants and mothers are the displacement and aspiration of such teeth cau sing injuries to the oral cavity along with The disturbance during breast feeding. The aim of t his case report is to discuss the...

  11. [Ancient teeth: research on teeth and jaws from archaeological sites].

    Science.gov (United States)

    Jelsma, J

    2016-05-01

    Archaeology aims to enhance our understanding of the human past. An archaeologist devotes him- or herself to material remains, most often from the earth. The best sources of information about human behaviour and the earlier conditions of life for human beings are gravesites. In addition to being a source of cultural information, well-preserved skeletons offer vast possibilities for biochemical and genetic research. Teeth in particular can provide a treasure trove of information about the lives of our ancestors. With DNA analysis, gender and genetic relationships can be determined, however, the surface of the teeth also provides information about gender, age and genetic relationships and, of course, about the use of the teeth. New discoveries are being made and new (bio-)archaeological analyses are being carried out all the time. PMID:27166454

  12. Class I malocclusion with anterior crossbite and severe crowding

    Directory of Open Access Journals (Sweden)

    Daltro Enéas Ritter

    2014-04-01

    Full Text Available This article reports the orthodontic diagnosis and treatment planning carried out with a 14-year and 5-month-old female patient with esthetic and functional complaints. She presented an Angle Class I malocclusion, anterior crossbite and severe crowding in both maxillary and mandibular arches, in addition to a lightly concave straight facial profile. Orthodontic treatment did not require extraction. Crossbite was corrected by protrusion of upper teeth, which contributed to alignment and leveling of teeth, in addition to improving the patient's facial profile. The case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as a requirement for the BBO certification.

  13. Angle Class II malocclusion treated with extraction of permanent teeth

    Directory of Open Access Journals (Sweden)

    Gustavo Mattos Barreto

    2013-08-01

    Full Text Available Angle Class II malocclusion associated with anterior open bite in adult patients demands a carefully elaborated orthodontic planning, aiming at restoring not only harmonious dental and facial esthetics, but also a balanced masticatory function. Orthognathic surgery or permanent teeth extraction are often the choice of treatment, therefore, treatment decision is related to all dental, skeletal and functional aspects. The present report discusses orthodontic compensation carried out by means of upper premolar extraction performed to correct the Class II canine relationship and, consequently, the anterior open bite, accepting that the upper incisors be retroclined. This clinical case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as part of the requirements for obtaining the BBO Certification.

  14. Trypan blue dye for anterior segment surgeries

    OpenAIRE

    Jhanji, V; Chan, E.; Das, S.; Zhang, H; Vajpayee, R B

    2011-01-01

    Use of vital dyes in ophthalmic surgery has gained increased importance in the past few years. Trypan blue (TB) has been a popular choice among anterior segment surgeons mainly due to its safety, ease of availability, and remarkable ability to enable an easy surgery in difficult situations mostly related to visibility of the targeted tissue. It is being used in cataract surgery since nearly a decade and its utilization has been extended to other anterior segment surgeries like trabeculectomy ...

  15. Case study: limitations of panoramic radiography in the anterior mandible.

    LENUS (Irish Health Repository)

    Walker, Cameron

    2009-12-01

    Dental Panoramic Tomography (DPT) is a widely used and valuable examination in dentistry. One area prone to artefacts and therefore misinterpretation is the anterior region of the mandible. This case study discusses a periapical radiolucency related to lower anterior teeth that is discovered to be a radiographic artefact. Possible causes of the artefact include a pronounced depression in the mental region of the mandible or superimposition of intervertebral spaces. Additional limitations of the DPT image include superimposition of radio-opaque structures, reduced image detail compared to intra-oral views and uneven magnification. These problems often make the DPT inappropriate for imaging the anterior mandible. Clinical Relevance: Panoramic radiography is often unsuitable for radiographic examination of the anterior mandible.

  16. Alternativa estética para reconstrução de dentes anteriores fraturados

    Directory of Open Access Journals (Sweden)

    Rachel Marturelli

    2007-01-01

    Full Text Available Anterior teeth fractures are clinical situations that demand scientific knowledge, technicalability and artistic sense for the success of the treatment, which has the adhesive technology asan conservative and fast alternative, with excellent aesthetic results. The purpose of thisclinical report is to describe a reconstruction technique of fractured teeth with endodonticinvolvement, by the use of micron-hybrid composite resin and aesthetic fiber glass post.

  17. Management of Grade III Mobile Anterior Tooth in Function Using Endostabilizer – A Case Report

    OpenAIRE

    Kokane, Vandana B; Swapnil N Patil

    2014-01-01

    Impact of implant dentistry is such that today very few dentists think about saving grade III mobile anterior teeth. A patient with grade III mobility of central incisor due to apical root resorption was treated by using 80 no.stainless steel ‘H’ file as endostabiliser and one year follow up was done. Endostabiliser reduced the mobility of grade III mobile teeth drastically, immediately after its placement. Tooth was absolutely asymptomatic throughout one year follow up.

  18. Brushing Your Child’s Teeth

    Science.gov (United States)

    ... age. Taking care of your child's gums and teeth every day helps prevent tooth decay and gum disease. It also helps make ... child. Learn how to care for your children's teeth and gums starting when they are newborn. When ...

  19. Segmentation of teeth in CT volumetric dataset by panoramic projection and variational level set

    International Nuclear Information System (INIS)

    Quantification of teeth is of clinical importance for various computer assisted procedures such as dental implant, orthodontic planning, face, jaw and cosmetic surgeries. In this regard, segmentation is a major step. In this paper, we propose a method for segmentation of teeth in volumetric computed tomography (CT) data using panoramic re-sampling of the dataset in the coronal view and variational level set. The proposed method consists of five steps as follows: first, we extract a mask in a CT images using Otsu thresholding. Second, the teeth are segmented from other bony tissues by utilizing anatomical knowledge of teeth in the jaws. Third, the proposed method is followed by estimating the arc of the upper and lower jaws and panoramic re-sampling of the dataset. Separation of upper and lower jaws and initial segmentation of teeth are performed by employing the horizontal and vertical projections of the panoramic dataset, respectively. Based the above mentioned procedures an initial mask for each tooth is obtained. Finally, we utilize the initial mask of teeth and apply a Variational level set to refine initial teeth boundaries to final contours. The proposed algorithm was evaluated in the presence of 30 multi-slice CT datasets including 3,600 images. Experimental results reveal the effectiveness of the proposed method. In the proposed algorithm, the variational level set technique was utilized to trace the contour of the teeth. In view of the fact that, this technique is based on the characteristic of the overall region of the teeth image, it is possible to extract a very smooth and accurate tooth contour using this technique. In the presence of the available datasets, the proposed technique was successful in teeth segmentation compared to previous techniques. (orig.)

  20. Segmentation of teeth in CT volumetric dataset by panoramic projection and variational level set

    Energy Technology Data Exchange (ETDEWEB)

    Hosntalab, Mohammad [Islamic Azad University, Faculty of Engineering, Science and Research Branch, Tehran (Iran); Aghaeizadeh Zoroofi, Reza [University of Tehran, Control and Intelligent Processing Center of Excellence, School of Electrical and Computer Engineering, College of Engineering, Tehran (Iran); Abbaspour Tehrani-Fard, Ali [Islamic Azad University, Faculty of Engineering, Science and Research Branch, Tehran (Iran); Sharif University of Technology, Department of Electrical Engineering, Tehran (Iran); Shirani, Gholamreza [Faculty of Dentistry Medical Science of Tehran University, Oral and Maxillofacial Surgery Department, Tehran (Iran)

    2008-09-15

    Quantification of teeth is of clinical importance for various computer assisted procedures such as dental implant, orthodontic planning, face, jaw and cosmetic surgeries. In this regard, segmentation is a major step. In this paper, we propose a method for segmentation of teeth in volumetric computed tomography (CT) data using panoramic re-sampling of the dataset in the coronal view and variational level set. The proposed method consists of five steps as follows: first, we extract a mask in a CT images using Otsu thresholding. Second, the teeth are segmented from other bony tissues by utilizing anatomical knowledge of teeth in the jaws. Third, the proposed method is followed by estimating the arc of the upper and lower jaws and panoramic re-sampling of the dataset. Separation of upper and lower jaws and initial segmentation of teeth are performed by employing the horizontal and vertical projections of the panoramic dataset, respectively. Based the above mentioned procedures an initial mask for each tooth is obtained. Finally, we utilize the initial mask of teeth and apply a Variational level set to refine initial teeth boundaries to final contours. The proposed algorithm was evaluated in the presence of 30 multi-slice CT datasets including 3,600 images. Experimental results reveal the effectiveness of the proposed method. In the proposed algorithm, the variational level set technique was utilized to trace the contour of the teeth. In view of the fact that, this technique is based on the characteristic of the overall region of the teeth image, it is possible to extract a very smooth and accurate tooth contour using this technique. In the presence of the available datasets, the proposed technique was successful in teeth segmentation compared to previous techniques. (orig.)

  1. Natal Teeth: A Case Report and Reappraisal

    OpenAIRE

    Malki,Ghadah A.; Al-Badawi, Emad A.; Dahlan, Mohammad A.

    2015-01-01

    The presence of teeth at birth (natal teeth) or within a month after delivery (neonatal teeth) is a rare condition. Natal and neonatal teeth are conditions of significant importance to pediatric dentists and pediatricians. This report discusses a case in which a five-day-old infant required extraction of a mobile mandibular natal tooth to avoid the risk of aspiration and interference with feeding. Also, a review of the literature was conducted to discuss the etiology, clinical features, compl...

  2. Multiple Impacted Teeth: Report of 3 Cases

    OpenAIRE

    Bayar, Gürkan Raşit; Ortakoḡlu, Kerim; Sencimen, Metin

    2008-01-01

    While impaction of tooth is widespread, multiple impacted teeth by itself is a rare condition and often found in association with syndromes such as cleidocranial dysplasia or Gardner’s syndrome. A light of radiographic examination, we describe three Turkish young males with multiple impacted teeth who didn’t possess any systemic conditions or syndromes involving both jaws. The first patient, a 21-year-old young male, had 16 unerupted teeth and 5 unerupted supernumerary teeth. The second patie...

  3. Bilateral anterior shoulder dislocation

    OpenAIRE

    Meena, Sanjay; Saini, Pramod; Singh, Vivek; Kumar, Ramakant; Trikha, Vivek

    2013-01-01

    Shoulder dislocations are the most common major joint dislocations encountered in the emergency departments. Bilateral shoulder dislocations are rare and of these, bilateral posterior shoulder dislocations are more prevalent than bilateral anterior shoulder dislocations. Bilateral anterior shoulder dislocation is very rare. We present a case of 24-year-old male who sustained bilateral anterior shoulder dislocation following minor trauma, with associated greater tuberosity fracture on one side...

  4. Take Care of Your Teeth and Gums

    Science.gov (United States)

    ... Teeth and Gums Print This Topic En español Take Care of Your Teeth and Gums Browse Sections The ... The Basics The Basics: Overview It’s important to take care of your teeth and gums. You can prevent ...

  5. Cracked Teeth: A Review of the Literature

    OpenAIRE

    Lubisich, Erinne B.; Hilton, Thomas J.; Ferracane, Jack

    2010-01-01

    Although cracked teeth are a common problem for patients and dentists, there is a dearth of evidence-based guidelines on how to prevent, diagnose, and treat cracks in teeth. The purpose of this article is to review the literature to establish what evidence exists regarding the risk factors for cracked teeth and their prevention, diagnosis, and treatment.

  6. Class I malocclusion with anterior crossbite and severe crowding

    OpenAIRE

    Ritter, Daltro Enéas

    2014-01-01

    This article reports the orthodontic diagnosis and treatment planning carried out with a 14-year and 5-month-old female patient with esthetic and functional complaints. She presented an Angle Class I malocclusion, anterior crossbite and severe crowding in both maxillary and mandibular arches, in addition to a lightly concave straight facial profile. Orthodontic treatment did not require extraction. Crossbite was corrected by protrusion of upper teeth, which contributed to alignment and leveli...

  7. Infantile-onset glaucoma and anterior megalophthalmos in osteogenesis imperfecta.

    Science.gov (United States)

    Bohnsack, Brenda L

    2016-04-01

    Osteogenesis imperfecta (OI) is an inherited condition in which defects in type 1 collagen cause abnormalities in many tissues and organs, including bone, teeth, heart valves, and eyes. We describe a 6-month-old boy with OI who presented with anterior megalophthalmos of the right eye and infantile-onset glaucoma of the left eye. To our knowledge, this is the first reported case of these types of congenital eye anomalies in an infant with OI. PMID:26994503

  8. Esthetic Management of an Anterior Avulsed Tooth: A Case Report

    OpenAIRE

    AR, Prabhakar; Sugandhan,; KB, Roopa; Gulati, Akanksha

    2009-01-01

    Avulsion and luxation account for up to 16% of all traumatic injuries in the permanent dentition and 7.2% of injuries in the primary dentition. A range of treatment options are available that can help conserve the tooth after a traumatic episode. There are, however, occasions where loss of the traumatized tooth is inevitable with special regard to avulsion injuries. replantation of teeth having doubtful long-term prognosis. Following the traumatic loss of an anterior tooth it is important tha...

  9. Multidisciplinary management of impacted central incisors due to supernumerary teeth and an associated dentigerous cyst.

    Science.gov (United States)

    Kalaskar, Ritesh R; Kalaskar, Ashita R

    2011-01-01

    Supernumerary teeth are the most common developmental dental anomaly resulting from hyperactivity of dental lamina, dichotomy, environmental factor, or polygenetic process of atavism. Supernumerary teeth present classical oral complication such as impaction of adjacent teeth, crowding, diastema formation, rotation, displacement of teeth, and occlusal interference. A dentigerous cyst associated with anterior supernumerary teeth (mesiodens) is rare and accounts for 5% of all dentigerous cysts. The present case reports describe the successful management of the impacted permanent maxillary central incisor positioned high in the vestibule. A combination of surgical and orthodontic techniques was employed to improve treatment outcome with greater hard and soft tissue preservation and to prevent psychological problems. In the surgical phase, supernumerary teeth and dentigerous cyst were removed. Subsequently traction was employed by bonding bracket on the labial surface using closed and open eruption techniques. Successively, fixed orthodontic treatment was started to align permanent maxillary central incisors in an occlusal plane. Thus, combination of surgical and orthodontic method can be the treatment of choice over surgical extraction, implant placement, and surgical repositioning. PMID:22114457

  10. Multidisciplinary management of impacted central incisors due to supernumerary teeth and an associated dentigerous cyst

    Directory of Open Access Journals (Sweden)

    Ritesh R Kalaskar

    2011-01-01

    Full Text Available Supernumerary teeth are the most common developmental dental anomaly resulting from hyperactivity of dental lamina, dichotomy, environmental factor, or polygenetic process of atavism. Supernumerary teeth present classical oral complication such as impaction of adjacent teeth, crowding, diastema formation, rotation, displacement of teeth, and occlusal interference. A dentigerous cyst associated with anterior supernumerary teeth (mesiodens is rare and accounts for 5% of all dentigerous cysts. The present case reports describe the successful management of the impacted permanent maxillary central incisor positioned high in the vestibule. A combination of surgical and orthodontic techniques was employed to improve treatment outcome with greater hard and soft tissue preservation and to prevent psychological problems. In the surgical phase, supernumerary teeth and dentigerous cyst were removed. Subsequently traction was employed by bonding bracket on the labial surface using closed and open eruption techniques. Successively, fixed orthodontic treatment was started to align permanent maxillary central incisors in an occlusal plane. Thus, combination of surgical and orthodontic method can be the treatment of choice over surgical extraction, implant placement, and surgical repositioning.

  11. Radiologic study of peridontal and periapical changes for the restorated teeth

    International Nuclear Information System (INIS)

    The purpose of this study is to investigate the effect of dental restorations on the periodontal and periapical tissues. The author examined 620 cases of amalgam, 390 cases of fold inlay, 442 cases of crown and 644 cases of bridge through the standard intraoral films being appended in the charts that gad been kept at the Dept. of Oral Diagnosis in Seoul National University Hospital. This study obtained the following results; 1. The restorations of amalgam, gold inlay crown and bridge were found more frequently in female than in male. 2. The restorations of amalgam, gold inlay and crown were found more numerously in mandibular teeth than in maxillary teeth in both sexes. But in the case of crown, the fact is quite the reverse especially in anterior teeth. 3. On the contrary, tn the case of bridge, the restorations of bridge were much more distributed in the maxillary teeth than in the mandibular teeth. 4. Roentgenographic changes of periodontal tissues whose teeth were treated with any type of four restorations were periodontal space widening, lamina dura discontinuity and periapical lesion in the order described in both sexes. 5. On the occasion of between amalgam and gold inlay or between crown and bridge, the differences of periodontal changes were of no consequence. On the other hand, the differences of periodontal changes were apparent between the group of amalgam and gold inlay and the group of crown and bridge.

  12. Genetic background of supernumerary teeth.

    Science.gov (United States)

    Subasioglu, Asli; Savas, Selcuk; Kucukyilmaz, Ebru; Kesim, Servet; Yagci, Ahmet; Dundar, Munis

    2015-01-01

    Supernumerary teeth (ST) are odontostomatologic anomaly characterized by as the existence excessive number of teeth in relation to the normal dental formula. This condition is commonly seen with several congenital genetic disorders such as Gardner's syndrome, cleidocranial dysostosis and cleft lip and palate. Less common syndromes that are associated with ST are; Fabry Disease, Ellis-van Creveld syndrome, Nance-Horan syndrome, Rubinstein-Taybi Syndrome and Trico-Rhino-Phalangeal syndrome. ST can be an important component of a distinctive disorder and an important clue for early diagnosis. Certainly early detecting the abnormalities gives us to make correct management of the patient and also it is important for making well-informed decisions about long-term medical care and treatment. In this review, the genetic syndromes that are related with ST were discussed. PMID:25713500

  13. The Replacement of Missing Teeth

    OpenAIRE

    Zarb, George A.

    1988-01-01

    Dentists have used a great deal of ingenuity in replacing lost teeth. Until recently, however, it was not possible to duplicate the natural situation and attach tooth-root analogues to the host bone. Osseointegration allows such an attachment, in which threaded unalloyed titanium implants are placed in the bone by means of a meticulous surgical procedure. The documented successful use of this process has already altered profoundly the predicament of the edentulous patient. The application of ...

  14. Iron deposition in modern and archaeological teeth

    Energy Technology Data Exchange (ETDEWEB)

    Williams, A.-M.M., E-mail: AnneMarie.Williams@utas.edu.au [School of Medicine, Private Bag 34, University of Tasmania, Hobart 7001 (Australia); Siegele, R. [Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234 (Australia)

    2014-09-15

    Iron surface concentrations and profile maps were measured on the enamel of archaeological and modern teeth to determine how iron is deposited in tooth enamel and if it was affected by the post-mortem environment. Teeth from Australian children who died in the second half of the 19th century were compared with contemporary teeth extracted for orthodontic purposes. Surface analysis of the teeth was performed using the 3 MV Van Der Graff Accelerator at The Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia. A small sample of teeth were then cut in the mid sagittal plane and analysed using ANSTO High Energy Heavy Ion Microprobe. Maps and linear profiles were produced showing the distribution of iron across the enamel. Results show that both the levels and distribution of iron in archaeological teeth is quite different to contemporary teeth, raising the suggestion that iron has been significantly altered by the post-mortem environment.

  15. Iron deposition in modern and archaeological teeth

    International Nuclear Information System (INIS)

    Iron surface concentrations and profile maps were measured on the enamel of archaeological and modern teeth to determine how iron is deposited in tooth enamel and if it was affected by the post-mortem environment. Teeth from Australian children who died in the second half of the 19th century were compared with contemporary teeth extracted for orthodontic purposes. Surface analysis of the teeth was performed using the 3 MV Van Der Graff Accelerator at The Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia. A small sample of teeth were then cut in the mid sagittal plane and analysed using ANSTO High Energy Heavy Ion Microprobe. Maps and linear profiles were produced showing the distribution of iron across the enamel. Results show that both the levels and distribution of iron in archaeological teeth is quite different to contemporary teeth, raising the suggestion that iron has been significantly altered by the post-mortem environment

  16. Bayes reconstruction of missing teeth

    DEFF Research Database (Denmark)

    Sporring, Jon; Jensen, Katrine Hommelhoff

    2008-01-01

     We propose a method for restoring the surface of tooth crowns in a 3D model of a human denture, so that the pose and anatomical features of the tooth will work well for chewing. This is achieved by including information about the position and anatomy of the other teeth in the mouth. Our system...... contains two major parts: A statistical model of a selection of tooth shapes and a reconstruction of missing data. We use a training set consisting of 3D scans of dental cast models obtained with a laser scanner, and we have build a model of the shape variability of the teeth, their neighbors, and their...... regularization of the log-likelihood estimate based on differential geometrical properties of teeth surfaces, and we show general conditions under which this may be considered a Bayes prior.Finally we use Bayes method to propose the reconstruction of missing data, for e.g. finding the most probable shape of a...

  17. INDIRECT FIBER-REINFORCED RESIN COMPOSITE RESTORATIONS FOR MANDIBULAR ANTERIOR DENTITION (18 MONTH FOLLOW UP)

    OpenAIRE

    BAYINDIR, Funda; DIKEÇ, Engin Volkan

    2015-01-01

    ABSTRACT The mandibular anterior tooth loss because of trauma or periodontal problems is seen frequently. In some cases, the presence of a diastema between teeth is a common feature found in the mandibular anterior dentition. Many forms of therapy can be used for diastema closure. A carefully developed diagnosis and advanced planning allows the most appropriate treatment to address the patient's needs. Among the suggested options are for diastema closure such as orthodontic, restorative and p...

  18. Immediate Esthetic Rehabilitation of Periodontally Compromised Anterior Tooth Using Natural Tooth as Pontic

    OpenAIRE

    K. Pavan Kumar; Surya Kumari Nujella; S. Sujatha Gopal; K. Karthik Roy

    2016-01-01

    For patients who require removal of anterior teeth and their replacement various treatment modalities are available. With advancement in technology and availability of glass/polyethylene fibres, use of natural tooth as pontic with fibre reinforced composite restorations offers the promising results. The present case report describes management of periodontally compromised mandibular anterior tooth using natural tooth pontic with fibre reinforcement. A 1-year follow-up showed that the bridge w...

  19. Immediate Esthetic Rehabilitation of Periodontally Compromised Anterior Tooth Using Natural Tooth as Pontic.

    Science.gov (United States)

    Kumar, K Pavan; Nujella, Surya Kumari; Gopal, S Sujatha; Roy, K Karthik

    2016-01-01

    For patients who require removal of anterior teeth and their replacement various treatment modalities are available. With advancement in technology and availability of glass/polyethylene fibres, use of natural tooth as pontic with fibre reinforced composite restorations offers the promising results. The present case report describes management of periodontally compromised mandibular anterior tooth using natural tooth pontic with fibre reinforcement. A 1-year follow-up showed that the bridge was intact with good esthetics and no problem was reported. PMID:27195156

  20. Immediate Esthetic Rehabilitation of Periodontally Compromised Anterior Tooth Using Natural Tooth as Pontic

    Science.gov (United States)

    Kumar, K. Pavan; Nujella, Surya Kumari; Gopal, S. Sujatha

    2016-01-01

    For patients who require removal of anterior teeth and their replacement various treatment modalities are available. With advancement in technology and availability of glass/polyethylene fibres, use of natural tooth as pontic with fibre reinforced composite restorations offers the promising results. The present case report describes management of periodontally compromised mandibular anterior tooth using natural tooth pontic with fibre reinforcement. A 1-year follow-up showed that the bridge was intact with good esthetics and no problem was reported. PMID:27195156

  1. Anterior Cruciate Ligament (ACL) Injuries

    Science.gov (United States)

    ... Help a Friend Who Cuts? Anterior Cruciate Ligament (ACL) Injuries KidsHealth > For Teens > Anterior Cruciate Ligament (ACL) ... and Recovery Coping With an ACL Injury About ACL Injuries A torn anterior cruciate ligament (ACL) is ...

  2. [Treatment of ankylosed teeth by segmental corticotomy: the Orthodontic Bone Stretching technique. Preliminary study].

    Science.gov (United States)

    Bousquet, Philippe; Artz, Christèle; Canal, Pierre

    2013-12-01

    Ankylosed anterior teeth are associated with infraclusion and can lead to a concomitant significant esthetic defect. After a review of the techniques used move these teeth into the arch, this article describes a new technique to restore occlusion and improve esthetics, or to prepare the case for either a prosthetic or implant treatment, Orthodontic Bone Stretching (OBS). This technic combines partial corticotomy and orthodontic treatment and produces bone stretching. After 8 to 12 weeks of force application, the ankylosed teeth are repositioned into occlusion or, if extraction is necessary, the bone crest is at a level consistent with a prosthetic or implant treatment. OBS technique can be adapted to implant infraclusion, or the vertical regeneration of atrophied ridge. PMID:24280548

  3. Trace Elements in Teeth by ICPMS

    International Nuclear Information System (INIS)

    Teeth are reported to be suitable indicators of trace element exposure from environment and nutritional status. Inductively coupled plasma mass spectrometry (ICP-MS) is used to compare the trace element content of children's primary teeth and adult teeth. Primary teeth are collected from 28 children and 42 adult from non-industrial City. The data are assessed statistically using t-tests. The adult teeth contained significantly greater concentrations of Na, Mg, Al, Fe, Ni, Cu, Sr, Cd, Ba, Pb and U and significantly less Mn, Co, As, Se, Mo and Bi than the children teeth. Additional measurements on adult teeth pulps are performed. Comparison between trace element concentrations in health and caries teeth pulps show that the mean concentrations of Na, Al, K, Cr, Mn, Co, Cu, Zn, Mo, Ag, Bi and U are lower in caries than healthy teeth pulps. On the other hand, the mean concentrations of Mg, Cd and Pb are higher in caries samples than healthy teeth pulps

  4. Teething

    Science.gov (United States)

    ... Accessed November 20, 2014. American Academy of Pediatric Dentistry. Guideline on infant oral health care. Revised 2014. Available at: www.aapd.org/media/Policies_Guidelines/G_infantOralHealthCare.pdf. Accessed November 20, 2014.

  5. Cutaneous Sinus Tract in Association with Traumatic Injury to the Teeth

    OpenAIRE

    Mishra, Rahul; Khan, Tayyeb Sultan

    2013-01-01

    ABSTRACT The present case report is of trauma episode of the lower anterior teeth, causing pulpal necrosis with periradicular periodontitis, resulting in the occurrence of cutaneous sinus tracts (fistula). Previous misdiagnosis and inappropriate medical treatment were ineffective. Only when properly referred to dentists, the differential diagnosis was made. The guideline to diagnose cutaneous sinus tracts (fistula) is based mainly on accurate pulp sensitivity tests of the involved traumatized...

  6. Anterior cervical plating

    Directory of Open Access Journals (Sweden)

    Gonugunta V

    2005-01-01

    Full Text Available Although anterior cervical instrumentation was initially used in cervical trauma, because of obvious benefits, indications for its use have been expanded over time to degenerative cases as well as tumor and infection of the cervical spine. Along with a threefold increase in incidence of cervical fusion surgery, implant designs have evolved over the last three decades. Observation of graft subsidence and phenomenon of stress shielding led to the development of the new generation dynamic anterior cervical plating systems. Anterior cervical plating does not conclusively improve clinical outcome of the patients, but certainly enhances the efficacy of autograft and allograft fusion and lessens the rate of pseudoarthrosis and kyphosis after multilevel discectomy and fusions. A review of biomechanics, surgical technique, indications, complications and results of various anterior cervical plating systems is presented here to enable clinicians to select the appropriate construct design.

  7. Anterior knee pain

    Science.gov (United States)

    Patellofemoral syndrome; Chondromalacia patella; Runner's knee; Patellar tendinitis; Jumper's knee ... or playing soccer). You have flat feet. Anterior knee pain is more ... skiers, bicyclists, and soccer players who exercise often ...

  8. Anterior knee pain

    Science.gov (United States)

    ... or playing soccer). You have flat feet. Anterior knee pain is more common in: People who are overweight People who have had a dislocation, fracture, or other injury to the kneecap Runners, jumpers, ...

  9. The restoration of traumatized teeth.

    Science.gov (United States)

    Liddelow, G; Carmichael, G

    2016-03-01

    The restoration of a traumatized tooth may require minimally invasive or more extensive treatment options. The majority of injuries occur in the younger population, so management should consider the long-term outcome, failure and future treatment needs over the course of, often, many decades. The aim should be to provide a tooth-restoration complex that closely mimics the functional and aesthetic qualities of an intact tooth for as long as possible. This narrative review will assess the relevant literature pertinent to restoration of traumatized teeth in order to provide guidance for the practising clinician. PMID:26923452

  10. Supernumerary teeth in non-syndromic patients

    Energy Technology Data Exchange (ETDEWEB)

    Mali, Santosh; Karjodkar, Freny Rashmiraj; Sontakke, Subodh; Sansare, Kaustubh [Nair Hospital Dental College, Maharashtra (India)

    2012-03-15

    Hyperdontia or supernumerary teeth without associated syndrome is a rare phenomenon, as supernumerary teeth are usually associated with cleft lip and palate or other syndromes such as Gardner's syndrome, cleidocranial dysplasia, and so on. Five patients with supernumerary teeth visited our department. They had no familial history or other pathology, certain treatment protocols was modified due to the presence of supernumerary teeth. Non-syndromic supernumerary teeth, if asymptomatic, need to have periodical radiographic observation. If they showed no variation as they impacted in the jaw, careful examination is necessary because they may develop into pathological status such as dentigerous cysts. The importance of a precise clinical history and radiographic examination for patients with multiple supernumerary teeth should be emphasized.

  11. Supernumerary teeth in non-syndromic patients

    International Nuclear Information System (INIS)

    Hyperdontia or supernumerary teeth without associated syndrome is a rare phenomenon, as supernumerary teeth are usually associated with cleft lip and palate or other syndromes such as Gardner's syndrome, cleidocranial dysplasia, and so on. Five patients with supernumerary teeth visited our department. They had no familial history or other pathology, certain treatment protocols was modified due to the presence of supernumerary teeth. Non-syndromic supernumerary teeth, if asymptomatic, need to have periodical radiographic observation. If they showed no variation as they impacted in the jaw, careful examination is necessary because they may develop into pathological status such as dentigerous cysts. The importance of a precise clinical history and radiographic examination for patients with multiple supernumerary teeth should be emphasized.

  12. Human teeth biobank for research in odontology

    OpenAIRE

    Lina C Gonzáles Pita; Úsuga Vacca, Margarita Viviana; Torres Rodríguez, Carolina; Delgado Mejía, Edgar

    2014-01-01

    Human teeth biobank (HTB) is a higher education linked non-profit entity that collects, stores and administers donated teeth. Such an entity is supported by sanitary, biosafety, ethical and legal regulations. The purpose of this article is to describe the creation and development of an HTB comprising the biological, ethical, legal and biosafety aspects and the importance of keeping extracted teeth under controlled, reproducible and standardized conditions that do not affect their structure an...

  13. Mutans Streptococci Colonization in Relation to Feeding Practices, Age and the Number of Teeth in 6 to 30-Month-Old Children: An in vivo Study

    OpenAIRE

    Sharma, Rajesh; Prabhakar, AR; Gaur, Anupama

    2012-01-01

    ABSTRACT Background: Early childhood caries has been characterized as first affecting the primary maxillary anterior teeth, followed by the involvement of the primary molars. Other terms for dental caries in preschool children, which inappropriately may imply cause for the disease, includes baby bottle tooth decay, nursing caries, milk bottle syndrome, baby bottle caries, nursing bottle mouth and nursing mouth. Aim: To explore the relationships of feeding practices, age and number of teeth pr...

  14. A New Design for Anterior Laminate Fixed-Partial dentures; PTU Type I

    Directory of Open Access Journals (Sweden)

    A. Pahlevan

    2006-03-01

    Full Text Available A new fixed-partial denture design using laminates is described for the replacement of a missing anterior tooth. In this article advantages, disadvantages, indications and contraindications of the new design have been discussed. This method is best suited forcases with missing incisors and esthetically compromised abutment teeth.

  15. A New Design for Anterior Laminate Fixed-Partial dentures; PTU Type I

    OpenAIRE

    A. Pahlevan

    2006-01-01

    A new fixed-partial denture design using laminates is described for the replacement of a missing anterior tooth. In this article advantages, disadvantages, indications and contraindications of the new design have been discussed. This method is best suited forcases with missing incisors and esthetically compromised abutment teeth.

  16. Cavity lining in primary teeth.

    Science.gov (United States)

    Chauhan, Ravi

    2016-03-01

    Data sourcesEmbase, Medline, Cochrane Central, Biomed Central and Open Grey databases and bibliographies of identified studies.Study selectionRandomised controlled trials investigating humans with primary caries lesions receiving operative treatment involving caries removal and restoration, with minimum two treatment groups comparing different cavity treatments before restoration (no lining versus lining) were included.Data extraction and synthesisData were extracted independently by two reviewers and study quality assessed using the Cochrane risk of bias tool. Random effect meta-analysis was carried out.ResultsThree studies involving a total of 89 patients were included. All the studies involved primary teeth and were conducted in Brazil. Follow-up periods ranged from 26-53 months. All the studies were considered to be at high risk of bias. Restoring the cavity without lining did not significantly affect the risk of failure. The quality of the evidence was low.ConclusionsCurrent evidence does not support strong recommendations to use or not to use liners after caries removal and before restoring cavities. Our findings are restricted to primary teeth after selective excavation, with only one liner (calcium hydroxide) being used for comparison. PMID:27012571

  17. Corticotomy and compression osteogenesis in the posterior maxilla for treating severe anterior open bite.

    Science.gov (United States)

    Kanno, T; Mitsugi, M; Furuki, Y; Kozato, S; Ayasaka, N; Mori, H

    2007-04-01

    A new technique is described for outpatient treatment of anterior open bite. The compression osteogenesis method with a two-stage corticotomy was used in the posterior maxilla to treat a woman with severe anterior open bite. Three-week post-surgical compression using anchor plates and elastics repositioned the posterior maxillary bone/teeth segments by 7 mm to the ideal superior position. The patient had a stable skeletal position of the maxilla at 14-month follow-up with satisfactory results and no complications after orthodontic treatment. This technique appears to be an efficient option for treating patients with anterior open bite. PMID:17110086

  18. In-vitro Evaluation of Fracture Strength Recovery of Reattached Anterior Fractured Tooth Fragment Using Different Re-Attachment Techniques

    OpenAIRE

    Abdulkhayum, Abdulmujeeb; Munjal, Sumit; Babaji, Prashant; Chaurasia, Vishwajit Rampratap; Munjal, Seema; Lau, Himani; Olekar, Santosh T; Lau, Mayank

    2014-01-01

    Background: Traumatic injuries caused to anterior teeth are most common. Emergency management of fractured fragments is necessary, for preserving their vitalities and for retaining aesthetics in an economical way. Various methods are available for restoring fractured, uncomplicated teeth, such as reattachment of fractured fragments, composite restoration. But only limited data is available on evaluation of the strength of reattached fractured fragments. Hence, the present study was designed.

  19. Optimizing Anterior En Masse Retraction with Miniscrew Anchorage

    Directory of Open Access Journals (Sweden)

    Pavankumar Janardan Vibhute

    2011-01-01

    Full Text Available In severely protrusive patients, skeletal anchorage from miniscrew is often used to avoid anchorage loss with preferred miniscrew location near centre of resistance (Cres of posterior teeth. Biomechanical requirement for directing retraction force towards Cres of posterior teeth demands the insertion of miniscrew in loose mucosa, where risk of infection and failure increases. In addition, undesirable biomechanical side effects on anterior and posterior segments may be possible in all three planes, when continuous arch sliding mechanics are installed with miniscrew anchorage. This paper describes technique of molar-stabilizing power arm (MSPA for simultaneous intrusion and retraction of anteriors with miniscrew placement at attached gingiva between 1st molar and 2nd premolar. Advantages of this technique include (i the need of miniscrews placement in loose mucosa apically near the Cres of the posterior teeth is eliminated, (ii the risk of infection and miniscrew failure is lowered since the miniscrew is placed in attached gingiva rather than the loose mucosa, and (iii by adjusting vertical length or replacing MSPA, alteration of the retraction force vector is possible in all three planes; thus, need of removal and repositioning of the miniscrew (e.g., in correction of occlusal cant can be eliminated.

  20. Optimizing anterior en masse retraction with miniscrew anchorage.

    Science.gov (United States)

    Vibhute, Pavankumar Janardan

    2011-01-01

    In severely protrusive patients, skeletal anchorage from miniscrew is often used to avoid anchorage loss with preferred miniscrew location near centre of resistance (Cres) of posterior teeth. Biomechanical requirement for directing retraction force towards Cres of posterior teeth demands the insertion of miniscrew in loose mucosa, where risk of infection and failure increases. In addition, undesirable biomechanical side effects on anterior and posterior segments may be possible in all three planes, when continuous arch sliding mechanics are installed with miniscrew anchorage. This paper describes technique of molar-stabilizing power arm (MSPA) for simultaneous intrusion and retraction of anteriors with miniscrew placement at attached gingiva between 1st molar and 2nd premolar. Advantages of this technique include (i) the need of miniscrews placement in loose mucosa apically near the Cres of the posterior teeth is eliminated, (ii) the risk of infection and miniscrew failure is lowered since the miniscrew is placed in attached gingiva rather than the loose mucosa, and (iii) by adjusting vertical length or replacing MSPA, alteration of the retraction force vector is possible in all three planes; thus, need of removal and repositioning of the miniscrew (e.g., in correction of occlusal cant) can be eliminated. PMID:22567438

  1. 21 CFR 872.5550 - Teething ring.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Teething ring. 872.5550 Section 872.5550 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... divice intended for use by infants for medical purposes to soothe gums during the teething process....

  2. Disinfection of Human Teeth for Educational Purposes.

    Science.gov (United States)

    Tate, William H.; White, Robert S.

    1991-01-01

    A study investigated the efficacy of glutaraldehyde and several other disinfectants for disinfecting teeth to be used for teaching and research, as an alternative to autoclaving for teeth with amalgam restorations. Results indicate that formalin was the only disinfectant that penetrated tooth pulp chambers in effective antimicrobial…

  3. Taking Care of Your Teeth and Mouth

    Science.gov (United States)

    ... Every day, a thin film of bacteria called dental plaque builds up on your teeth. The bacteria in plaque produce acids that can begin to harm enamel. ... also need to clean around your teeth with dental floss every day. Careful flossing will take off plaque and leftover food that a toothbrush can’t ...

  4. Single anterior tooth replacement by a cast lingual loop connector - a conservative approach.

    Science.gov (United States)

    Dandekeri, Shilpa Sudesh; Dandekeri, Savita

    2014-09-01

    One of the most challenging and complex treatment modality is replacement of single anterior tooth. This can be overcome by different treatment options such as implant-supported restorations as well as conventional porcelain-fused-to-metal and resin-bonded fixed partial dentures. Drifting of teeth into the edentulous area may reduce the available pontic space; whereas a diastema existing before an extraction may result in excessive mesiodistal dimension to the pontic space. Loop connector fixed partial denture (FPD) may be the simplest and best solution to maintain the diastema and provide optimum restoration of aesthetics. This article describes the procedure for the fabrication of a loop connector FPD to restore an excessively wide anterior edentulous space in a patient with existing spacing between the maxillary anterior teeth. PMID:25386535

  5. Lead levels in human teeth from the inhabitants of Mexico City from three different historical periods

    International Nuclear Information System (INIS)

    Human teeth from pre-Columbian, colonial and contemporary population groups were analyzed by PIXE in order to evaluate the lead contents in the inhabitants of Mexico City through different historical periods. Lead contents showed significant differences among the three groups, in Pre-Columbian teeth no lead was found, colonial teeth showed higher lead levels than contemporary ones. This results suggest that the native americans had no exposure to this toxic metal. The lead-glaze pottery introduced by the Spaniards, utilized in pottery and lead pipes, was the main source of lead in the colonial period. In recent teeth the deposited lead is mainly due to the absorption from the contaminated atmosphere. (Author)

  6. Congenital anterior urethral diverticulum.

    Science.gov (United States)

    Singh, Sanjeet Kumar; Ansari, Ms

    2014-09-01

    Congenital anterior urethral diverticulum (CAUD) may be found all along the anterior urethra and may present itself at any age, from infant to adult. Most children with this condition present with difficulty in initiating micturition, dribbling of urine, poor urinary stream, or urinary tract infection. A careful history will reveal that these children never had a good urinary stream since birth, and the telltale sign is a cystic swelling of the penile urethra. In this paper, we present two cases of CAUD that were managed by excision of the diverticulum with primary repair. PMID:26328174

  7. Incidence of post-operative pain following single visit endodontics in vital and non-vital teeth: An in vivo study

    Directory of Open Access Journals (Sweden)

    Sumita Bhagwat

    2013-01-01

    Full Text Available This clinical study was conducted to compare the post-operative pain following single visit endodontics in vital and non-vital teeth, with and without periapical radiolucency. A total of 60 adult patients requiring root canal therapy in anterior and premolar teeth were selected for this study. Single sitting root canal treatment was carried out and the subjects were recalled after 2 weeks and instructed to fill out a series of self-report questionnaires for responses about pain in the interim after 1 day, 2 day, 3 day, 1 week and 2 weeks. In vital teeth (Group I 60% of the treated cases had pain, of which 36% had mild pain (non-significant and 24% had moderate pain (significant. In non-vital teeth without periapical radiolucency (Group II 64% of cases had pain, of which 48% had mild pain (non-significant and 16% had moderate pain (significant. In non-vital teeth with periapical radiolucency (Group III 32% of the cases had pain of which 24% had mild pain (non-significant and 8% had moderate pain (significant. None of the teeth in any of the groups had severe pain. There was no statistical difference between incidence of pain in vital and non-vital teeth without periapical radiolucency. Non-vital teeth with periapical radiolucency exhibited relatively less pain as compared with non-vital teeth without periapical radiolucency, but the pain continued in a significant percent of teeth even after 2 weeks. Pain incidence dropped significantly within a period of 1 day to 2 weeks in vital teeth and non-vital teeth without periapical radiolucency. There was a tendency for less incidence of significant pain after a single visit root canal treatment in these groups. Results obtained were comparable with those obtained by several investigators.

  8. Fracture resistance of posterior teeth restored with modern restorative materials

    OpenAIRE

    Ibrahim M. Hamouda; Shehata, Salah H.

    2011-01-01

    We studied the fracture resistance of maxillary premolars restored with recent restorative materials. Fifty maxillary premolars were divided into five groups: Group 1 were unprepared teeth; Group 2 were teeth prepared without restoration; Group 3 were teeth restored with tetric ceram HB; Group 4 were teeth restored with InTen S; and Group 5 were teeth restored with Admira. The samples were tested using a universal testing machine. Peak loads at fracture were recorded. The teeth restored with ...

  9. Anterior vaginal wall repair

    Science.gov (United States)

    ... symptoms will go away. This improvement will often last for years. Alternative Names A/P repair; Vaginal wall repair; Anterior and/ ... writing by ADAM Health Solutions. About MedlinePlus Site Map FAQs Contact ... Institutes of Health Page last updated: 23 August 2016

  10. [Toxic anterior segment syndrome].

    Science.gov (United States)

    Cornut, P-L; Chiquet, C

    2011-01-01

    Toxic anterior segment syndrome (TASS) is a general term used to describe acute, sterile postoperative inflammation due to a non-infectious substance that accidentally enters the anterior segment at the time of surgery and mimics infectious endophthalmitis. TASS most commonly occurs acutely following anterior segment surgery, typically 12-72h after cataract extraction. Anterior segment inflammation is usually quite severe with hypopyon. Endothelial cell damage is common, resulting in diffuse corneal edema. No bacterium is isolated from ocular samples. The causes of TASS are numerous and difficult to isolate. Any device or substance used during the surgery or in the immediate postoperative period may be implicated. The major known causes include: preservatives in ophthalmic solutions, denatured ophthalmic viscosurgical devices, bacterial endotoxin, and intraocular lens-induced inflammation. Clinical features of infectious and non-infectious inflammation are initially indistinguishable and TASS is usually diagnosed and treated as acute endophthalmitis. It usually improves with local steroid treatment but may result in chronic elevation of intraocular pressure or irreversible corneal edema due to permanent damage of trabecular meshwork or endothelial cells. PMID:21176994

  11. Orthodontics Align Crooked Teeth and Boost Self-Esteem

    Science.gov (United States)

    ... desktop! more... Orthodontics Align Crooked Teeth and Boost Self- esteem Article Chapters Orthodontics Align Crooked Teeth and Boost Self- esteem Orthodontics print full article print this chapter email ...

  12. Salvation of severely fractured anterior tooth: An orthodontic approach

    Directory of Open Access Journals (Sweden)

    Ashok Ayer

    2016-01-01

    Full Text Available Restoration of severely fractured teeth presents a challenge to the endodontist and may require an interdisciplinary approach for proper management. When the available crown structure is less, orthodontic forced extrusion is the option where the coronal root structure is exposed for proper restoration. This report describes the management of severely fractured maxillary right lateral incisor with extensive loss of coronal structure and fracture line extending below gingival margin. Endodontic treatment of the fractured tooth was followed by controlled orthodontic extrusion to expose fracture margin and providing sufficient coronal tooth structure to support the prosthesis. Orthodontic extrusion may be considered as a viable option for the salvation of fractured anterior teeth.Journal of College of Medical Sciences-Nepal, Vol.11(4 2015: 35-38

  13. Influence of voluntary teeth clenching on the stabilization of postural stance disturbed by electrical stimulation of unilateral lower limb.

    Science.gov (United States)

    Fujino, Sachiko; Takahashi, Toshiyuki; Ueno, Toshiaki

    2010-01-01

    Studies on the relationship between dental occlusion and body balance have suggested that occlusion status contributes to the maintenance of postural balance. However, little has been reported about the effects of voluntary teeth clenching on the stabilization of postural stance in novel environments. In the present study we investigated whether teeth clenching influenced adaptation to the perturbation introduced by electrical stimulation of a unilateral lower limb. Subjects (12 adults) stood on a force plate, from which motion data were obtained in the horizontal plane with and without voluntary teeth clenching and were instructed to maintain the position throughout the experiment. We evoked a novel environment by supramaximal percutaneous electrical stimulation of the common peroneal nerve. Electromyograms (EMG) were recorded from the masseter and the peroneus longus (PL) muscles with bipolar surface cup electrodes. When the disturbed postural stance was generated by electrical stimulation, the maximum reaction force in the anterior-posterior (A/P) direction with teeth clenching (CL) was significantly smaller than that without voluntary teeth clenching (control; CO) (p<0.05) and the peak time of the ground reaction force/body mass (GRF/BM) in the A/P direction occurred earlier in the CL condition than CO (p<0.05). There were no significant differences in the peak-to-peak amplitude of GRF/BM and the peak time of GRF/BM, in the M/L direction under both CL and CO conditions. Thus, the present study showed that voluntary teeth clenching contributed to stabilization of the postural stance perturbed transiently by electrical stimulation. We concluded that voluntary teeth clenching plays an important role in rapid postural adaptation to the anterior-posterior perturbation in the upright position. PMID:19879763

  14. Two Body Wear of Newly Introduced Nanocomposite Teeth and Cross Linked Four Layered Acrylic Teeth: a Comparitive In Vitro Study

    OpenAIRE

    Ilangkumaran, R.; Srinivasan, J.; Baburajan, K.; N.Balaji

    2014-01-01

    Statement of Problem: Wear of complete denture teeth results in compromise in denture esthetics and functions. To counteract this problem, artificial teeth with increased wear resistance had been introduced in the market such as nanocomposite teeth. Purpose: The purpose of this study was to compare the amount of wear between nanocomposite teeth and acrylic teeth. Materials and methods: Fifteen specimens were chosen from each group namely the nanocomposite teeth (SR_-PHONARES) and the acrylic ...

  15. The teeth, jaws, and salivary glands

    International Nuclear Information System (INIS)

    Roentgenographic examination of the teeth is used by the medical profession largely to determine the presence or absence of infection involving the teeth and jaws. Certain changes in the alveolus result from generalized disease, and examination of the teeth is helpful in assessing these conditions as well. Tumors arising on the alveolar ridge, tongue, or other intraoral sites may involve the bony alveolus. Roentgenographic examination is used to look for and follow the progress of such tumors. Specific techniques for dental radiography include intraoral dental roentgenographic study and the panoramic type of extraoral examinations. Three general intraoral methods of examination are used - the intraoral dental, bite-wing, and occlusal

  16. A prosthodontic management of severely resorbed anterior ridge defect - a case report.

    Science.gov (United States)

    Rai, Rathika; V, Menaga; R, Prabhu; Kr, Geetha; R, Suprabha

    2014-09-01

    The Dental profession has devoted most of its history to restoring the effects of dental disease. The public's interest in Dental health and beauty has become an engine that continues to drive the demand for cosmetic dental procedures. In the past, achieving a beautiful smile required submission to extensive invasive procedures and expensive fixed dental prosthetic restorations. Advancements in restorative material formulations and adhesive technology have expanded such possibilities. Despite many recent advances in aesthetic dentistry techniques and materials, certain cases remain difficult to restore. Replacing missing anterior teeth presents a serious challenge to the clinicians especially with a large ridge defect. Such cases require not only replacement of the missing teeth but also the restoration of the bone defect, aesthetics and phonetics. While the conventional treatment approaches like fixed partial denture or an option of implant may not justify the restoration of the defects. A combination of fixed and removable restoration provides good alternative. The aim and purpose of this case report is to describe a multidisciplinary approach of managing a patient who reported with a similar complaint of missing anterior teeth with anterior ridge defect hoping to get not only her teeth but also her lost smile. PMID:25386538

  17. Anterior cruciate ligament (ACL) injury

    Science.gov (United States)

    Cruciate ligament injury - anterior; ACL injury; Knee injury - anterior cruciate ligament (ACL) ... confirm the diagnosis. It may also show other knee injuries. First aid for an ACL injury may include: ...

  18. Take Care of Your Teeth and Gums

    Science.gov (United States)

    ... This Topic En español Take Care of Your Teeth and Gums Browse Sections The Basics Overview Why ... Brushing Tips 4 of 6 sections Take Action: Dental Checkups Get regular checkups at the dentist. Visit ...

  19. Bruxism (Teeth Grinding or Clenching) (For Parents)

    Science.gov (United States)

    ... Tropical Delight: Melon Smoothie Pregnant? Your Baby's Growth Bruxism (Teeth Grinding or Clenching) KidsHealth > For Parents > Bruxism ( ... called bruxism , which is common in kids. About Bruxism Bruxism is the medical term for the grinding ...

  20. Non-syndromic multiple supernumerary teeth: report of a case with 13 supplemental teeth

    OpenAIRE

    Ansari, Afroz Alam; Malhotra, Seema; Pandey, Ramesh Kumar; Bharti, Kusum

    2013-01-01

    The presence of supernumerary teeth (STs) may give rise to a variety of clinical problems. These include failure of a tooth to erupt, delayed eruption, ectopic eruption, diastema, rotation of adjacent teeth, displacement of teeth and crowding. This case describes a 14-year-old male patient who presented with the complaint of pain in the left mandibular posterior region. Intraoral examination revealed the presence of carious retained deciduous second molar in this region. An orthopantomogram w...

  1. Comparative Evaluation of Impact Strength of Fragment Bonded Teeth and Intact Teeth: An In Vitro Study

    OpenAIRE

    Venugopal, L.; Lakshmi, M Narasimha; Babu, Devatha Ashok; Kiran, V Ravi

    2014-01-01

    Background: To test and compare the impact strength of fragment bonded teeth with that of intact teeth by using impact testing machine (pendulum type) as a mode of load. Materials and Methods: Forty extracted, maxillary, central incisors selected for this study (20 control group and 20 experimental group). In experimental group, teeth crowns were fractured with a microtome at 2.5 mm from mesioincisal angle cervically, fractured portion is attached to original crown ...

  2. Anterior Cruciate Ligament Injury

    OpenAIRE

    Vilaseca, Tomas; Chahla, Jorge; Rodriguez, Gustavo Gomez; Arroquy, Damián; Herrera, Gonzalo Perez; Orlowski, Belen; Carboni, Martín

    2015-01-01

    Objectives: The objective of this study was to analyze whether it is more frequent the presence of a decreased range of motion in the hips of recreational athletes with primary injury of the anterior cruciate ligament (ACL) than in a control group of volunteers without knee pathology. Methods: We included prospectively recreational athletes between 18 and 40 years with an acute ACL injury between January 2011 and January 2013. They were compared with a control group of volunteers recreational...

  3. Retrospective study of 145 supernumerary teeth

    OpenAIRE

    Fernández Montenegro, Paula; Valmaseda Castellón, Eduardo; Berini Aytés, Leonardo; Gay Escoda, Cosme

    2006-01-01

    Objective: The goal of the present retrospective study is to describe the distribution of the supernumerary teeth in a population of patients that have been attended at the Public Clinic of the Department of Oral Surgery. Background: Supernumerary teeth and multiple hyperdontia are usually associated with different syndromes, such as Gardner syndrome, or with facial fissures; however, they can appear in patients without any pathology. Their prevalence oscillates to 0.5-3.8% in patients with p...

  4. Non-syndromic supernumerary teeth: report of a case with 6 supernumerary teeth

    Directory of Open Access Journals (Sweden)

    Taghibakhsh M

    2011-02-01

    Full Text Available "nBackground and Aims: Multiple supernumerary teeth are rare and often found in association with syndromes such as Gardner, Cleidocranial dysplasia and cleft lip and palate, with a much less chance for isolated"nnon-syndromic cases. The aim of this study was to report a case with 6 supernumerary teeth without syndromic association."nCase Report: The patient was a 33 year-old female, referred to oral diseases and diagnosis department with chief complaint of sensitivity to cold and hot food in right upper premolar region. Oral examination revealed 5 erupted lingually supernumerary teeth (four in mandibular and one in maxillary premolar region, respectively. Further panoramic radiography clarified an extra impacted tooth in the palatal region of left premolar maxillary area. All extra teeth had been appeared since the age of 17 during one year, as the patient claimed. Medical history and thorough clinical and paraclinical examinations were not significant except for the hypothyroidism, since 5 years ago. No other family member noticed to be the case. Based on our findings, a diagnosis of non-syndromic multiple supernumerary teeth was established."nConclusion: A thorough examination of each patient presented with supernumerary teeth, including panoramic and intraoral radiographic images may provide valuable information regarding accompanying syndromes and unerupted teeth. Early diagnosis is an essential step for orthodontic or surgical decisions making, preventing or avoiding worsening complications such as malocclusion, adjacent normal teeth delayed eruption or rotation, diasthema, cystic lesions and resorption of contiguous teeth.

  5. Hybrid type anterior fibre-reinforced composite resin prosthesis: a case report.

    Science.gov (United States)

    Garoushi, Sufyan; Shinya, Akikazu; Shinya, Akiyoshi; Vallittu, Pekka K

    2008-03-01

    A variety of therapeutic modalities, from implant to conventional Maryland prosthesis, can be used for the replacement of a missing anterior tooth. In patients refusing implant treatment, when minimal teeth reduction is preferred, a fibre reinforced composite (FRC) prosthesis can be a good alternative to conventional prosthetic techniques. The purpose of this case report is to describe the clinical procedure for fabricating hybrid type FRC prosthesis with pre-impregnated unidirectional E-glass fibres. Fibre-reinforced composite, in combination with adhesive technology, appears promising treatment option for replacing missing teeth. However, further clinical investigation will be required to provide additional information on this technique. PMID:18468325

  6. Straight, white teeth as a social prerogative.

    Science.gov (United States)

    Khalid, Abeer; Quiñonez, Carlos

    2015-06-01

    A distinguishing feature of North American society is preoccupation with self-image, as seen in the ritualistic nature of bodily practices aimed at constantly improving the body. Nowhere is this more apparent than in the prevailing fixation with straight, white teeth. While there is an ever-expanding literature on the sociology of body, very little has been written on teeth in this context. Using literature from anthropology, biology, dentistry, sociology and social psychology, this study attempts to answer: (1) Why have straight, white teeth become a beauty ideal in North American society? (2) What is the basis for this ideal? (3) How is this ideal propagated? It demonstrates that dental aesthetic tendencies are biologically, culturally and socially patterned. Concepts from the works of Pierre Bourdieu and Michel Foucault are used to illustrate how straight, white teeth contribute towards reinforcing class differences and how society exercises a disciplinary power on individuals through this ideal. It is concluded that modified teeth are linked to self and identity that are rooted in social structure. Moreover, teeth demonstrate the ways in which class differences are embodied and projected as symbols of social advantage or disadvantage. Implications on professional, public health, sociological and political levels are considered. PMID:25923766

  7. Coevolutionary patterning of teeth and taste buds.

    Science.gov (United States)

    Bloomquist, Ryan F; Parnell, Nicholas F; Phillips, Kristine A; Fowler, Teresa E; Yu, Tian Y; Sharpe, Paul T; Streelman, J Todd

    2015-11-01

    Teeth and taste buds are iteratively patterned structures that line the oro-pharynx of vertebrates. Biologists do not fully understand how teeth and taste buds develop from undifferentiated epithelium or how variation in organ density is regulated. These organs are typically studied independently because of their separate anatomical location in mammals: teeth on the jaw margin and taste buds on the tongue. However, in many aquatic animals like bony fishes, teeth and taste buds are colocalized one next to the other. Using genetic mapping in cichlid fishes, we identified shared loci controlling a positive correlation between tooth and taste bud densities. Genome intervals contained candidate genes expressed in tooth and taste bud fields. sfrp5 and bmper, notable for roles in Wingless (Wnt) and bone morphogenetic protein (BMP) signaling, were differentially expressed across cichlid species with divergent tooth and taste bud density, and were expressed in the development of both organs in mice. Synexpression analysis and chemical manipulation of Wnt, BMP, and Hedgehog (Hh) pathways suggest that a common cichlid oral lamina is competent to form teeth or taste buds. Wnt signaling couples tooth and taste bud density and BMP and Hh mediate distinct organ identity. Synthesizing data from fish and mouse, we suggest that the Wnt-BMP-Hh regulatory hierarchy that configures teeth and taste buds on mammalian jaws and tongues may be an evolutionary remnant inherited from ancestors wherein these organs were copatterned from common epithelium. PMID:26483492

  8. What are the longevities of teeth and oral implants?

    DEFF Research Database (Denmark)

    Holm-Pedersen, Poul; Lang, Niklaus P; Müller, Frauke

    2007-01-01

    To analyse tooth loss and to evaluate the longevity of healthy teeth and teeth compromised by diseases and influenced by therapy as well as that of oral implants.......To analyse tooth loss and to evaluate the longevity of healthy teeth and teeth compromised by diseases and influenced by therapy as well as that of oral implants....

  9. Freeze-dried fibular allograft in anterior spinal surgery: cervical and lumbar applications.

    OpenAIRE

    Wetzel, F.T.; Hoffman, M. A.; Arcieri, R. R.

    1993-01-01

    Fifty-six patients who underwent anterior fusion utilizing fibular allograft are reviewed. Thirty-two patients underwent multiple-level anterior cervical discectomy and fusion utilizing fibular strut allograft, and 24 underwent anterior lumbar discectomy and fusion using fibular strut allograft. Cervical surgery was performed via the strut technique of Whitecloud and LaRocca and lumbar surgery was performed via a transperitoneal or retroperitoneal approach. Postoperatively, patients were assi...

  10. Rehabilitation of Avulsed Teeth in Fractured Jaws via Bone Grafting and Implant Placement: Report of Two Cases.

    Science.gov (United States)

    Jain, Anshul; Baliga, Shridhar

    2015-07-01

    The maxillofacial region is one of the most injury-prone areas during road traffic accidents, personal violence, falls and sports. Maxillofacial trauma can lead to breakage or avulsion of upper anterior teeth, which may cause significant aesthetic and functional problems. There are many treatment options available for rehabilitation including removable partial dentures, fixed partial dentures, crown and bridges and implant-supported prostheses. Herein, two cases are presented where implant placement was done for upper anterior teeth, which were traumatized or avulsed following maxillofacial trauma. Both patients demonstrated a history of maxillofacial trauma and had undergone open reduction and internal fixation. The first patient had a severe maxillary alveolar defect treated via autogenous bone grafting and a six-month period was given for proper integration of the bone graft. The second patient was a smoker with very poor oral hygiene and a deep bite. Thus, implant placement was not initially justified. PMID:26877745

  11. Rehabilitation of Avulsed Teeth in Fractured Jaws via Bone Grafting and Implant Placement: Report of Two Cases

    Directory of Open Access Journals (Sweden)

    Anshul Jain

    2016-01-01

    Full Text Available The maxillofacial region is one of the most injury-prone areas during road traffic accidents, personal violence, falls and sports. Maxillofacial trauma can lead to breakage or avulsion of upper anterior teeth, which may cause significant aesthetic and functional problems. There are many treatment options available for rehabilitation including removable partial dentures, fixed partial dentures, crown and bridges and implant-supported prostheses.Herein, two cases are presented where implant placement was done for upper anterior teeth, which were traumatized or avulsed following maxillofacial trauma. Both patients demonstrated a history of maxillofacial trauma and had undergone open reduction and internal fixation. The first patient had a severe maxillary alveolar defect treated via autogenous bone grafting and a six-month period was given for proper integration of the bone graft. The second patient was a smoker with very poor oral hygiene and a deep bite. Thus, implant placement was not initially justified.

  12. Congenitally missing teeth (hypodontia: A review of the literature concerning the etiology, prevalence, risk factors, patterns and treatment

    Directory of Open Access Journals (Sweden)

    Vahid Rakhshan

    2015-01-01

    Full Text Available Congenitally missing teeth (CMT, or as usually called hypodontia, is a highly prevalent and costly dental anomaly. Besides an unfavorable appearance, patients with missing teeth may suffer from malocclusion, periodontal damage, insufficient alveolar bone growth, reduced chewing ability, inarticulate pronunciation and other problems. Treatment might be usually expensive and multidisciplinary. This highly frequent and yet expensive anomaly is of interest to numerous clinical, basic science and public health fields such as orthodontics, pediatric dentistry, prosthodontics, periodontics, maxillofacial surgery, anatomy, anthropology and even the insurance industry. This essay reviews the findings on the etiology, prevalence, risk factors, occurrence patterns, skeletal changes and treatments of congenitally missing teeth. It seems that CMT usually appears in females and in the permanent dentition. It is not conclusive whether it tends to occur more in the maxilla or mandible and also in the anterior versus posterior segments. It can accompany various complications and should be attended by expert teams as soon as possible.

  13. Rare occurrence of bilaterally impacted mandibular supernumerary teeth

    OpenAIRE

    Vinay Kumar Bhardwaj; Jai Ram Kaundal; Anil Chug; Sanjeev Vaid; Abhishek Soni; Mohinder Chandel

    2012-01-01

    Introduction: Supernumerary teeth are present in addition to the normal complement of teeth in permanent or deciduous dentitions. Incidence is high in permanent dentition, affects both the gender. They are more common in males, with the male to female ratio of 2:1. When the supernumerary teeth are causing problems such as, extensive resorption of adjacent teeth, hindering the eruption or malposition of permanent teeth, early surgical intervention is recommended. Case Report: A case of bilater...

  14. Rehabilitation of Avulsed Teeth in Fractured Jaws via Bone Grafting and Implant Placement: Report of Two Cases

    OpenAIRE

    Anshul Jain; Shridhar Baliga

    2015-01-01

    The maxillofacial region is one of the most injury-prone areas during road traffic accidents, personal violence, falls and sports. Maxillofacial trauma can lead to breakage or avulsion of upper anterior teeth, which may cause significant aesthetic and functional problems. There are many treatment options available for rehabilitation including removable partial dentures, fixed partial dentures, crown and bridges and implant-supported prostheses.Herein, two cases are presented where implant pla...

  15. Torque control during lingual anterior retraction without posterior appliances

    OpenAIRE

    Mo, Sung-Seo; Kim, Seong-Hun; Sung, Sang-Jin; Chung, Kyu-Rhim; Chun, Yun-Sic; Kook, Yoon-Ah; Nelson, Gerald

    2013-01-01

    Objective To evaluate the factors that affect torque control during anterior retraction when utilizing the C-retractor with a palatal miniplate as an exclusive source of anchorage without posterior appliances. Methods The C-retractor was modeled using a 3-dimensional beam element (0.9-mm-diameter stainless-steel wire) attached to mesh bonding pads. Various vertical heights and 2 attachment positions for the lingual anterior retraction hooks (LARHs) were evaluated. A force of 200 g was applied...

  16. The evaluation of the carbon fiber post system on restoration of teeth defect in children

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xiang-hao; WANG Xin-zhi

    2006-01-01

    Background Post and post-core systems are used to restore extensively damaged teeth. Among these systems,cast alloy post and core, prefabricated threaded alloy post and prefabricated simple alloy post are most frequently applied in China nowadays. In Europe and North America a combined application of the fiber post, resin-core and crown has been applied to restore seriously destructed teeth with satisfactory results in recent years. This study was intended to evaluate the clinical effect of carbon fiber post system on restoration of child anterior tooth defect after root canal therapy, based on 3- 5 years' observation.Methods One hundred and six children with incompletely established occlusion were observed and followed for an average of 42 months (ranging from 36 to 60 months). Eighty-five upper teeth and forty-one lower teeth were restored with carbon fiber post system and composite jacket crown. Periodic check-up was conducted for periodontal condition and restoration effect.Results One hundred and twenty-one (96.2%) restorations were successful. Four jacket crowns (3.0%) were lost. One tooth (0.8%) had slight gingival inflammation. Tooth root or post fracture and gingival stain were not observed. X-ray showed there was no obvious change in aspects including the width of periodontal membrane,the density of alveolar bone and the height of alveolar ridge crest.Conclusions Carbon-fiber post system can satisfy the clinical requirements of young patients who have residual anterior crown and root caused by trauma or caries, and have incomplete occlusion and have completed root canal therapy. This system helps realize good esthetic result for patients and easy practice for dentists.Carbon fiber post is safe and convenient, especially for sick children.

  17. Forensic identification in teeth with caries.

    Science.gov (United States)

    Alia-García, Esther; Parra-Pecharromán, David; Sánchez-Díaz, Ana; Mendez, Susy; Royuela, Ana; Gil-Alberdi, Laura; López-Palafox, Juan; del Campo, Rosa

    2015-12-01

    Human teeth are biological structures that resist extreme conditions thus becoming a useful source of DNA for human forensic identification purposes. When it is possible, forensic prefer only non-damaged teeth whereas those with cavities are usually rejected to avoid both external and internal bacterial contamination. Cavities are one of the most prevalent dental pathology and its incidence increases with ageing. The aim of this study was to validate the use of teeth with cavities for forensic identification. A total of 120 individual teeth from unrelated patients (60 healthy and 60 with cavities, respectively) extracted by a dentist as part of the normal process of treatment, were submitted for further analysis. Dental pulp was obtained after tooth fragmentation, complete DNA was extracted and the corresponding human identification profile was obtained by the AmpFlSTR® NGM SElect™ kit. Cariogenic microbiota was determined by PCR-DGGE with bacterial universal primers and bands were excised, re-amplified and sequenced. From the 120 dental pieces analyzed, a defined genetic profile was obtained in 81 (67.5%) of them, with no statistical differences between the healthy and the cavities-affected teeth. Statistical association between teeth status, DNA content and genetic profiles was not observed. Complex bacterial communities were only detected in the cavities group, being the Streptococcus/Enterococcus, and Lactobacillus genera the most represented. We conclude that teeth with cavities are as valid as healthy dental pieces for forensic human identification. Moreover, the severity of the cariogenic lesion as well as associated bacterial communities seems not to influence the establishment of human dental profiles. PMID:26386340

  18. Anterior knee pain

    International Nuclear Information System (INIS)

    Anterior knee pain is a common complain in all ages athletes. It may be caused by a large variety of injuries. There is a continuum of diagnoses and most of the disorders are closely related. Repeated minor trauma and overuse play an important role for the development of lesions in Hoffa's pad, extensor mechanism, lateral and medial restrain structures or cartilage surface, however usually an increase or change of activity is referred. Although the direct relation of cartilage lesions, especially chondral, and pain is a subject of debate these lesions may be responsible of early osteoarthrosis and can determine athlete's prognosis. The anatomy and biomechanics of patellofemoral joint is complex and symptoms are often unspecific. Transient patellar dislocation has MR distinct features that provide evidence of prior dislocation and rules our complication. However, anterior knee pain more often is related to overuse and repeated minor trauma. Patella and quadriceps tendon have been also implicated in anterior knee pain, as well as lateral or medial restraint structures and Hoffa's pad. US and MR are excellent tools for the diagnosis of superficial tendons, the advantage of MR is that permits to rule out other sources of intraarticular derangements. Due to the complex anatomy and biomechanic of patellofemoral joint maltracking is not fully understood; plain films and CT allow the study of malalignment, new CT and MR kinematic studies have promising results but further studies are needed. Our purpose here is to describe how imaging techniques can be helpful in precisely defining the origin of the patient's complaint and thus improve understanding and management of these injuries

  19. The anterior cingulate cortex

    Directory of Open Access Journals (Sweden)

    Pavlović D.M.

    2009-01-01

    Full Text Available The anterior cingulate cortex (ACC has a role in attention, analysis of sensory information, error recognition, problem solving, detection of novelty, behavior, emotions, social relations, cognitive control, and regulation of visceral functions. This area is active whenever the individual feels some emotions, solves a problem, or analyzes the pros and cons of an action (if it is a right decision. Analogous areas are also found in higher mammals, especially whales, and they contain spindle neurons that enable complex social interactions. Disturbance of ACC activity is found in dementias, schizophrenia, depression, the obsessive-compulsive syndrome, and other neuropsychiatric diseases.

  20. Miniplacas permitem tratamento eficiente e eficaz da mordida aberta anterior Miniplates allow efficient and effective treatment of anterior open bites

    Directory of Open Access Journals (Sweden)

    Jorge Faber

    2008-10-01

    Full Text Available INTRODUÇÃO: o tratamento das deformidades e más oclusões que incluem mordidas abertas anteriores foi uma das primeiras aplicações de miniplacas como forma de ancoragem ortodôntica. A implementação desse sistema de tratamento reduz o número de pacientes indicados para a cirurgia ortognática e simplifica muitos problemas. Nessa abordagem, os dentes posteriores são intruídos e a mandíbula sofre um giro no sentido anti-horário, diminuindo a altura facial inferior e projetando os pogônios de tecidos duro e mole. OBJETIVO: o presente artigo apresenta os fundamentos da mecânica ortodôntica para correção da mordida aberta anterior e os ilustra com uma série de casos clínicos.INTRODUCTION: The treatment of facial deformities and malocclusions, such as anterior open bite, was one of the first applications of miniplates for orthodontic anchorage. The use of this treatment system reduces the number of patients referred to orthognathic surgery and simplifies many problems. This approach applies intrusive forces to posterior teeth, and the mandible undergoes counterclockwise rotation, which decreases lower facial height and advances the projection of hard and soft tissue pogonions. OBJECTIVE: This study describes the principles of orthodontic mechanics in the correction of anterior open bite and illustrates these principles with a series of cases.

  1. Clinical research of teeth damage from radiotherapy

    International Nuclear Information System (INIS)

    Objective: To analyze various factors inducing teeth damage from radiotherapy and the preventive and treatment methods. Methods: One hundred cases of patients treated by radiotherapy were divided into two groups. In group one there were 60 cases whose teeth were irradiated during treatment; in group two there were 40 cases whose teeth were not irradiated during treatment. Results: The caries incidence was 60% for group one and 15% for group two (P<0.01). By auto-control in 15 patients, the caries incidence on the sick side was obviously higher than that of the healthy side. Hundred percent caries incidence was found in 6 cases who received a dosage of 70 Gy. Conclusion: The authors believe that radiation damage to the teeth is associated with the following factors: 1. The dosage and location of irradiation are closely related to caries incidence; 2. The active dentinoblasts are very sensitive to radiation; 3. Damage to the salivary glands from radiotherapy can result in reduction of salvia and pH value, leading to a high growth rate of Streptococcus mutans. Following preventive measures could be considered in future cases: to apply a caries prevention coating or protective dental crown and TPS, to adjust the dose and time of irradiation, to select conformal radiotherapy technique. The key points for protecting the teeth and salivary gland from caries and damage are protection of the proliferation ability of pulp cells, anti-inflammation, promotion of microcirculation, and strengthening body resistance

  2. An analysis on forced eruption in crown lengthening of un-restorable teeth

    Directory of Open Access Journals (Sweden)

    Vahid A

    2004-07-01

    Full Text Available Cervical third root defects, like perforations (due to resoption or iatrogeic, fractures or invasive decays make great difficulties for appropriate restoration making. In these circumstances crown lengthening is needed, especially for anterior teeth. Forced eruption also could be a beneficial treatment. By this therapy, cervical third root defects will be available to receive a good restoration. without gum and biologic width problems. In this article tried to introduce this method of therapy by reviewing litraure and with regard to personal research.

  3. Immediate Esthetic Rehabilitation of Periodontally Compromised Anterior Tooth Using Natural Tooth as Pontic

    Directory of Open Access Journals (Sweden)

    K. Pavan Kumar

    2016-01-01

    Full Text Available For patients who require removal of anterior teeth and their replacement various treatment modalities are available. With advancement in technology and availability of glass/polyethylene fibres, use of natural tooth as pontic with fibre reinforced composite restorations offers the promising results. The present case report describes management of periodontally compromised mandibular anterior tooth using natural tooth pontic with fibre reinforcement. A 1-year follow-up showed that the bridge was intact with good esthetics and no problem was reported.

  4. Multidisciplinary management of anterior diastemata

    DEFF Research Database (Denmark)

    Furuse, Adilson Yoshio; Herkrath, Fernando José; Franco, Eduardo Jacomino;

    2007-01-01

    Anterior diastemata may compromise the harmony of a patient's smile. Consideration of etiologic factors, previous gingival conditioning, and individual treatment planning are essential in the proper management of anterior diastemata. An integrated orthodontic-restorative approach may enhance the...... aesthetic results when orthodontic therapy itself is not feasible. This article presents integrated orthodonticrestorative solutions of anterior diastemata, associated with the conditioning of the gingival tissue with composite resin, and discusses the most relevant aspects related to their etiology and...

  5. Clinical Report of 1 Cases of Monozygotic Twins Supernumerary Teeth%单卵双胞胎兄弟额外牙1例

    Institute of Scientific and Technical Information of China (English)

    杨春敏

    2014-01-01

    额外牙是指牙数目异常,其发生可能来自形成过多的牙蕾,也可能是牙胚分裂而成。临床上最多见的是上前牙区单颗多生牙。单卵双胞胎同患多生牙未见报道,同时含有2颗或多颗多生牙者更少见。近日笔者遇到一对双胞胎兄弟,因上前牙区多生牙影响美观前来就诊,由此正确的诊断及时拔除额外牙具有临床意义。%Supernumerary tooth is tooth abnormalities, which may be derived from the formation of excessive tooth bud, may also be split into tooth germ. Clinical go up to see at most is the anterior teeth area single supernumerary teeth. Monozygotic twins with supernumerary teeth is not reported, while containing two or more supernumerary teeth are more rare. I recently met a pair of twin brothers, because to supernumerary teeth appearance came to visit, report as fol ows now.Because the forward supernumerary teeth af ect the appearance to come round to see a doctor, the clinical significance of the correct diagnosis and timely removal of supernumerary teeth. Report as fol ows now.

  6. Supernumerary teeth: case report and literature review

    International Nuclear Information System (INIS)

    Supernumerary teeth (ST) have been an anomaly of tooth development, this is refered to the increase in the number of pieces in the normal dentition. It can be unique, multiple, unilateral or bilateral, normal or altered form; appear erupted, impacted or retained. Both dentitions are affected, but is most common in the permanent. The literature review has covered and mentioned spanned supernumerary teeth, the definition, etiology, characteristics and classification according to number, position and shape; as diagnose, alterations or clinical sequelae - eruptive associated with them and possible treatments to be done when it occurs. The presence of mechanical accidents have been a frequent complication, within this, displacement of adjacent teeth has been the most common; is associated with different syndromes such as lip and palate cleft; however, they can not be related with pathologies; being mesiodens the most frequent. (author)

  7. Esthetic Rehabilitation of a Severely Compromised Anterior Area: Combined Periodontal and Restorative Approach

    Directory of Open Access Journals (Sweden)

    Rachele Censi

    2014-01-01

    Full Text Available The complete oral rehabilitation of patients demanding a beautiful and attractive smile involves a multidisciplinary approach that includes the change of both the morphological aspect of the teeth and the architecture of gum tissues. This clinical report describes a successful interdisciplinary approach for the treatment of an esthetically compromised dentition. In a first phase, the periodontal plastic surgery was performed for root coverage and, in particular, it was decided for the execution of a coronally advanced flap for the treatment of multiple recession defects. Once complete healing of soft tissues was obtained, six lithium disilicate veneers were placed over the anterior maxillary teeth. Lithium disilicate is a glass-based ceramic which presents excellent aesthetics and allows the passage of light without creating unnatural reflections. This feature has made it possible to recreate a natural aspect of teeth that in combination with the harmonic architecture of soft tissue has permitted obtaining a beautiful and pleasant smile.

  8. The dynamic relationship between pathological migrating teeth and periodontal disease

    Directory of Open Access Journals (Sweden)

    Surekha R Rathod

    2013-01-01

    Full Text Available Background: Pathologic migration is defined as change in tooth position resulting from disruption of the forces that maintain teeth in normal position in relation to their arch. The disruption of equilibrium in tooth position may be caused by several etiologic factors. So, the aim of the study was to evaluate the pathologic tooth migration (PTM in the upper anterior sextant and its relationship with predisposing and external factors such as bone loss, tooth loss, gingival inflammation, age, parafunctions, lingual interposition in the tongue thrust, and oral habits. Aim: The aim of the study was to evaluate the PTM in the upper anterior sextant and its relationship with predisposing and external factors such as bone loss, tooth loss, gingival inflammation, age, parafunctions, lingual interposition in the tongue thrust, and oral habits. Materials and Methods: The study sample consisted of 100 subjects of both sexes, with age ranging from 19 to 72 years. The probing pocket depth and gingival index were recorded for each patient. Competency of lips was also evaluated as competent or incompetent. Habits such as tongue thrusting, nail biting, and lip sucking were evaluated in relation to pathological migration of the tooth. Results: The results showed that no single factor by itself is clearly associated with PTM. As bone loss increases, the association of PTM with additional factors such as tooth loss and gingival inflammation increases. Conclusion: Further studies would be of great help to identify under which circumstances PTM is reversible according to the influence of gingival inflammation, malocclusion, and other factors. This information would contribute to a better understanding of some biological implications of the so-called minor tooth movement.

  9. ESR dating of teeth from Brazilian megafauna

    Science.gov (United States)

    Oliveira, L. C.; Kinoshita, A.; Barreto, A. M. F.; Figueiredo, A. M.; Silva, J. L. L.; Baffa, O.

    2010-11-01

    The study of radiation defects created in biomaterials, such as bone and teeth, can be used in dating with importance to palaeontology and archaeology. Two Stegomastodon teeth (AL1 and AL2) from north-eastern Brazilian megafauna were studied by electron spin resonance (ESR) spectroscopy. The samples were collected in Fazenda Ovo da Ema, (913349 / 3714965) UTM, Alagoas state, Brazil. The dating of these samples can contribute to the better knowledge of megafauna presence in this region as well as to the events associated to the extinction of these species.

  10. Assesment of gingival microcirculation in anterior teeth using laser Doppler flowmetry

    Science.gov (United States)

    Canjau, Silvana; Miron, Mariana I.; Todea, Carmen D.

    2016-03-01

    Introduction: Evaluating the health status of the gingival tissue represents an important objective in the daily practice. Inflammation changes the microcirculatory and micromorphological dynamics of human gingiva. Aim: The purpose of this study was to evaluate the microcirculation in subjects with moderate gingivitis and healthy gingiva by using laser Doppler flowmetry (LDF). Material and Methods: Recordings of the gingival microcirculation (GM) were taken from 20 healthy gingival sites and from 20 sites with moderate gingivitis. The gingival blood flows in the gingivitis group before treatment was significantly different from those in the healthy gingiva group. Signals were recorded with the aid of a laser Doppler MoorLab instrument VMS-LDF2 probe VP3 10 mm S/N 2482. Three consecutive determinations of the GM were registered for each site, as follows: before the initial therapy, at 24 hours after the initial therapy and then, 7 days after the initial therapy. The data were processed using the statistical analysis software SPSS v16.0.1. Results: The results of this preliminary study showed statistically significant differences among the GM values recorded before and after the initial therapy. Conclusions: LDF could be a useful, noninvasive, sensitive, reproducible, and harmless method for measuring gingival blood flow (gingival microcirculation) in humans.

  11. Personal Factors Determining Patient Satisfaction with All-Ceramic Crown Treatment for Single Anterior Teeth.

    Science.gov (United States)

    Zou, Yun; Zhan, DeSong

    2016-01-01

    The Eysenck Personality Questionnaire's (EPQ) N value (neuroticism) was used to evaluate information from 158 patients before ceramic crown treatment. Patient satisfaction was also evaluated using a satisfaction questionnaire 2 weeks post treatment. Patient expectations were not correlated with sex, age, or N value, and sex was not correlated with patient satisfaction other than in relation to crown shape. Total esthetic satisfaction and feature improvement were positively correlated with age, while satisfaction for five specific criteria was negatively correlated with N value and overall expectation. These observations underscore the importance of considering the physical and psychologic aspects of patient care when planning dental treatment. PMID:27611752

  12. Esthetic Rehabilitation of Anterior Teeth with Porcelain Laminates and Sectional Veneers

    NARCIS (Netherlands)

    Gresnigt, Marco; Ozcan, Mutlu

    2011-01-01

    Full-coverage bonded porcelain restorations offer predictable treatment options in dentistry, but a certain amount of tooth material must be removed to allow space for the required thickness of the restorative material. Laminate veneers and inlays are considered minimally invasive, but they also req

  13. Pulpal sequelae after trauma to anterior teeth among adult Nigerian dental patients

    OpenAIRE

    Adekoya-Sofowora Comfort A; Oginni Adeleke O

    2007-01-01

    Abstract Background Epidemiological studies show that about 11.6% to 33.0% of all boys and about 3.6% to 19.3% of all girls suffer dental trauma of varying severity before the age of 12 years. Moderate injuries to the periodontium such as concussion and subluxation are usually associated with relatively minor symptoms and hence may go unnoticed by the patient or the dentist, if consulted. Patients with these kinds of injuries present years after a traumatic accident most of the time with a si...

  14. Placement of Dental Implant in a Knife Edge Ridge in Anterior Aesthetic Zone

    OpenAIRE

    Rajput, Narpat Singh; Bhaskar, J.; Valiathan, Mohan; Chandrasekaran, S.C.; Alam, Md.Nazish

    2013-01-01

    Dental implants are established alternatives for replacing missing teeth. Dental implants are artificial tooth root, positioned in the jaw bone, in order to sustain the replacement tooth or bridge. Recent advance in dental implant technology has made it more convenient, efficient and affordable for patients. In the anterior maxilla, esthetic demands not only require well-anchored implants but also sufficient soft and hard tissue in order to achieve natural looking result. Augmentation of the ...

  15. Single Anterior Tooth Replacement by a Cast Lingual Loop Connector - A Conservative Approach

    OpenAIRE

    Dandekeri, Shilpa Sudesh; Dandekeri, Savita

    2014-01-01

    One of the most challenging and complex treatment modality is replacement of single anterior tooth. This can be overcome by different treatment options such as implant-supported restorations as well as conventional porcelain-fused-to-metal and resin-bonded fixed partial dentures. Drifting of teeth into the edentulous area may reduce the available pontic space; whereas a diastema existing before an extraction may result in excessive mesiodistal dimension to the pontic space. Loop connector fix...

  16. Managing the severely proclined maxillary anteriors by extracting traumatized right maxillary central incisor

    OpenAIRE

    2014-01-01

    A 14-year-old girl reported with severely proclined maxillary anterior teeth with fractured and discolored right maxillary central incisor with questionable prognosis. Autotransplantation of premolar to replace central incisor was considered a risky option as patient was 14-year-old with presence of advanced root development of premolar. The immediate placement of the prosthetic implant was also not possible because of patient′s age. Therefore, it was decided to use the space obtained by extr...

  17. Stability of maxillary anterior crowding treatment Estabilidade do tratamento de apinhamento anterossuperior

    OpenAIRE

    Camila Leite Quaglio; Karina Maria Salvatore de Freitas; Marcos Roberto de Freitas; Guilherme Janson; José Fernando Castanha Henriques

    2012-01-01

    OBJECTIVE: To evaluate the stability and the relapse of maxillary anterior crowding treatment on cases with premolar extraction and evaluate the tendency of the teeth to return to their pretreatment position. METHODS: The experimental sample consisted of 70 patients of both sex with an initial Class I and Class II maloclusion and treated with first premolar extractions. The initial mean age was 13,08 years. Dental casts' measurements were obtained at three stages (pretreatment, posttreatment ...

  18. Resin-bonded restorations: A strategy for managing anterior tooth loss in adolescence

    OpenAIRE

    Zitzmann, Nicola U; Özcan, Mutlu; Scherrer, Susanne; Bühler, Julia M.; Weiger, Roland; Krastl, Gabriel

    2015-01-01

    In children or adolescents with anterior tooth loss, space closure with the patient's own teeth should be considered as the first choice to avoid lifelong restorative needs. Thorough diagnostics and treatment planning are required when autotransplantation or orthodontic space closure is considered. If these options are not indicated and a single tooth implant restoration is considered, implant placement should be postponed until adulthood, particularly in young women and in patients with hype...

  19. Evaluation of technical quality and periapical health of root-filled teeth by using cone-beam CT

    Directory of Open Access Journals (Sweden)

    Bilge Gülsüm NUR

    2014-12-01

    Full Text Available Objective This study aimed to assess the quality of root fillings, coronal restorations, complications of all root-filled teeth and their association with apical periodontitis (AP detected by cone-beam computed tomography (CBCT images from an adult Turkish subpopulation. Material and Methods The sample for this study consisted of 242 patients (aging from 15 to 72 years with 522 endodontically treated teeth that were assessed for technical quality of the root canal filling and periapical status of the teeth. Additionally, the apical status of each root-filled tooth was assessed according to the gender, dental arch, tooth type and age classification, undetected canals, instrument fracture, root fracture, apical resorption, apical lesion, furcation lesion and type and quality of the coronal structure. Statistical analysis was performed using percentages and chi-square test. Results The success rate of the root canal treatment was of 54.4%. The success rates of adequate and inadequate root canal treatment were not significantly different (p>0.05. Apical periodontitis was found in 228 (45.6% teeth treated for root canals. Higher prevalence of AP was found in patients aging from 20 to 29 years [64 (27% teeth] and in anterior (canines and incisors teeth [97 (41% teeth]. Conclusions The technical quality of root canal filling performed by dental practitioners in a Turkish subpopulation was consistent with a high prevalence of AP. The probable reasons for this failure are multifactorial, and there may be a need for improved undergraduate education and postgraduate courses to improve the clinical skills of dental practitioners in endodontics.

  20. Anterior cruciate ligament reconstruction

    International Nuclear Information System (INIS)

    This paper determines the efficacy of MR imaging in evaluation of the anterior cruciate ligament (ACL) following reconstructive surgery. Forty-three MR examinations were performed in 33 patients who had undergone previous arthroscopic ACL reconstruction with patellar bone-tendon- bone autografts (postoperative period, 1-24 months; mean, 5.2 months). Of the 40 studies performed in clinically stable knees (30 patients), MR demonstrated a well-defined, signal void ACL graft in 36. Of the three studies performed in three patients with clinical ACL laxity or suspected tear, the neoligament was of intermediate definition in one and nondiscernible in the other two. As in the native knee, buckling of the PCL was suggestive of ACL insufficiency. Bone tunnel placement, patellar tendon changes, and joint effusions were also evaluated

  1. Anterior hip pain.

    Science.gov (United States)

    O'Kane, J W

    1999-10-15

    Anterior hip pain is a common complaint with many possible causes. Apophyseal avulsion and slipped capital femoral epiphysis should not be overlooked in adolescents. Muscle and tendon strains are common in adults. Subsequent to accurate diagnosis, strains should improve with rest and directed conservative treatment. Osteoarthritis, which is diagnosed radiographically, generally occurs in middle-aged and older adults. Arthritis in younger adults should prompt consideration of an inflammatory cause. A possible femoral neck stress fracture should be evaluated urgently to prevent the potentially significant complications associated with displacement. Patients with osteitis pubis should be educated about the natural history of the condition and should undergo physical therapy to correct abnormal pelvic mechanics. "Sports hernias," nerve entrapments and labral pathologic conditions should be considered in athletic adults with characteristic presentations and chronic symptoms. Surgical intervention may allow resumption of pain-free athletic activity. PMID:10537384

  2. Sterilisation of extracted human teeth for educational use

    Directory of Open Access Journals (Sweden)

    Kumar M

    2005-01-01

    Full Text Available Sixty intact, non-carious and unrestored teeth extracted due to periodontal disease were used to determine the most effective method of sterilisation. The teeth were divided into six groups, each containing 10 teeth. Group 1 teeth were immersed in 10% formalin for seven days, group 2 teeth were immersed in 3% hydrogen peroxide for seven days, group 3 teeth were immersed in 2.6% sodium hypochlorite for seven days, group 4 teeth were boiled in water at 100°C for 20 minutes, group 5 teeth were autoclaved at 121°C at 15 lbs psi for 30 minutes, and group 6 teeth were immersed in normal saline for seven days. After the treatment, the teeth were individually inoculated into trypticase soy broth and incubated for 48 hours. A questionnaire survey was also conducted to determine the awareness of dental students regarding infection due to extracted human teeth and the common disinfection/sterilisation methods used. Autoclaving at 121°C, 15 lbs psi for 30 minutes and immersion in 10% formalin for seven days were effective in disinfecting/sterilising extracted human teeth. Chemicals such as 2.6% sodium hypochlorite, 3% hydrogen peroxide and boiling in water were not effective. The results indicate that autoclaving for 30 minutes or immersion in 10% formalin for seven days could be effectively used for disinfection/sterilisation of extracted human teeth.

  3. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... and E-poly antioxidant-infused technology during a hip replacement through the anterior supine intramuscular approach. “OR- ... Dr. Keith Berend perform an anterior approach total hip replacement with the patient on a regular OR ...

  4. Computing Contact Stresses In Gear Teeth

    Science.gov (United States)

    Oswald, Fred B.; Somprakit, Paisan; Huston, Ronald L.

    1995-01-01

    Improved method of computing contact stresses in gear teeth accounts for complicating effects like those of static and sliding friction. Provides iterative procedure for determination of contact region and nodal contact forces along with contact stresses. Method based on equations and computational procedure incorporating these effects routinely.

  5. Do We Need National Standards with Teeth?

    Science.gov (United States)

    Usiskin, Zalman

    2007-01-01

    The author, director of the University of Chicago School Mathematics Project, tackles the following question: Should the United States have national standards with teeth, that is, a single set of standards tied to assessments and agreed to by the states? Proponents advance five main arguments for implementing such a standard. In his rebuttal, the…

  6. Set Someone's Teeth on Edge

    Institute of Scientific and Technical Information of China (English)

    江河

    2002-01-01

    有些人听到刺耳的声音,或尝到酸溜溜的滋味时,会被刺激得牙齿颤动。“Set someone's teeth on edge”的成语由此产生,解释为使某人不安、烦躁甚至咬牙切齿。

  7. Elephant teeth from the atlantic continental shelf

    Science.gov (United States)

    Whitmore, F.C., Jr.; Emery, K.O.; Cooke, H.B.S.; Swift, D.J.P.

    1967-01-01

    Teeth of mastodons and mastodons have been recovered by fishermen from at least 40 sites on the continental shelf as deep as 120 meters. Also present are submerged shorelines, peat deposits, lagoonal shells, and relict sands. Evidently elephants and other large mammals ranged this region during the glacial stage of low sea level of the last 25.000 years.

  8. Teeth: Among Nature's Most Durable Biocomposites

    Science.gov (United States)

    Lawn, Brian R.; Lee, James J.-W.; Chai, Herzl

    2010-08-01

    This paper addresses the durability of natural teeth from a materials perspective. Teeth are depicted as smart biocomposites, highly resistant to cumulative deformation and fracture. Favorable morphological features of teeth at both macroscopic and microscopic levels contribute to an innate damage tolerance. Damage modes are activated readily within the brittle enamel coat but are contained from spreading catastrophically into the vulnerable tooth interior in sustained occlusal loading. Although tooth enamel contains a multitude of microstructural defects that can act as sources of fracture, substantial overloads are required to drive any developing cracks to ultimate failure—nature's strategy is to contain damage rather than avoid it. Tests on model glass-shell systems simulating the basic elements of the tooth enamel/dentin layer structure help to identify important damage modes. Fracture and deformation mechanics provide a basis for analyzing critical conditions for each mode, in terms of characteristic tooth dimensions and materials properties. Comparative tests on extracted human and animal teeth confirm the validity of the model test approach and point to new research directions. Implications in biomechanics, especially as they relate to dentistry and anthropology, are outlined.

  9. Hierarchical structure and biomineralization in cricket teeth

    International Nuclear Information System (INIS)

    The cricket is a truculent insect with stiff and sharp teeth as a fighting weapon. The structure and possible biomineralization of cricket teeth are always interesting. Synchrotron radiation X-ray fluorescence, X-ray diffraction, and small angle X-ray scattering techniques were used to probe the element distribution, possible crystalline structures and size distribution of scatterers in cricket teeth. A scanning electron microscope was used to observe the nanoscaled structure. The results demonstrate that Zn is the main heavy element in cricket teeth. The surface of a cricket tooth has a crystalline compound like ZnFe2(AsO4)2(OH)2(H2O)4. The interior of the tooth has a crystalline compound like ZnCl2, which is from the biomineralization. The ZnCl2-like biomineral forms nanoscaled microfibrils and their axial direction points towards the top of the tooth cusp. The microfibrils aggregate randomly into intermediate filaments, forming a hierarchical structure. A sketch map of the cricket tooth cusp is proposed and a detailed discussion is given in this paper. (authors)

  10. Simulation of a flow around biting teeth

    Science.gov (United States)

    Narusawa, Hideaki; Yamamoto, Eriko; Kuwahara, Kunio

    2008-11-01

    We simulated a flow around biting teeth. The decayed tooth is a disease that a majority of people are annoyed. These are often generated from a deep groove at occlusal surface. It is known that a person who bites well doesn't suffer from a decayed tooth easily. Biting forces reach as much as 60 kg/cm^2 by an adult male, and when chewing, upper and lower teeth approach to bite by those forces. The crushed food mixed with saliva becomes high viscosity fluid, and is pushed out of ditches of teeth in the direction of the cheek or the tongue. Teeth with complex three dimension curved surface are thought to form venturi at this time, and to generate big pressure partially. An excellent dental articulation will possibly help a natural generation of a flow to remove dental plaque, i.e. the cause of the decayed tooth. Moreover, the relation of this flow with the destruction of the filled metal or the polymer is doubted. In this research, we try to clarify the pressure distributions by this flow generation as well as its dynamics when chewing. One of our goals is to enable an objective design of the shape of the dental fillings and the artificial tooth. Tooth has a very small uneven ground and a bluff body. In this case, to calculate a computational numerical simulation to solve the Navier-Stokes equations three dimension Cartesian coordinate system is employed.

  11. Teeth Caries Decay in MR Imaging

    International Nuclear Information System (INIS)

    X-ray based visualization techniques were for many years the only way to asses structure and state of the human teeth. MRI has been used in the research of the healthy and decayed teeth during last decade. Several papers were presented showing usefulness of spin echo and gradient echo imaging, Single Point Imaging, SPRITE and STRAFI techniques for visualization of the dental surface geometry as well as for distinction between soft tissue (pulp) and mineralized tissue (enamel, dentine and root cement) in the extracted teeth. Recently, MRI was used for estimation of the facial bone structure, in preparation to implantation, localization of the tumor in the facial bone tissue, and in detection of the osteoporosis. The aim of this work was to investigate potential of MRI for detection and estimation of the caries, on the level of laboratory pre-clinical tests. This work was done within the project to develop original, MRI based diagnostic technique for dentistry needs. MRI experiments were performed on the 5 decayed extracted human teeth (impossible conservative therapy), obtained at Dept. of Dental Surgery MUS. After extraction teeth were stored in saline. MRI measurements were done in MR Tomography Lab INP. Prior to the experiment, tooth was degassed to minimize magnetic susceptibility artifacts. A 3D spin echo pulse sequence on the 4.7 T research MRI system, equipped with Maran DRX console, and dedicated home-built probe head, was used to obtain three dimensional (256x128x128) images of the teeth. Corresponding resolution was 60x120x160 mm3. High intensity signal from water penetrated into the porous decayed regions of tooth, contrasted with lack of signal from mineralized tooth tissue, allow for visualization of the presence and extent of caries. Among the 5 measured teeth, MRI allows for detection of the caries in two most decayed tooth. High intensity signal from water penetrated into the porous decayed regions of tooth, contrasted with lack of signal from

  12. The large superpredators' teeth from Middle Triassic of Poland

    Science.gov (United States)

    Surmik, Dawid; Brachaniec, Tomasz

    2013-09-01

    An unusual large teeth, finding from time to time in marine sediments of Muschelkalk, Silesia, Poland indicate the superpredators occurrence. According to size and morphological features the teeth are similar to archosaurs or giant marine reptiles.

  13. Prevalence of congenitally missing permanent teeth in Iran

    Directory of Open Access Journals (Sweden)

    Mahnaz Sheikhi

    2012-01-01

    Conclusion: The prevalence of congenitally missing teeth (CMT in Iranian permanent dentition was 10.9%. The most common congenitally missing teeth were mandibular second premolar fallowed by maxillary second premolars.

  14. Consequences of crown shortening canine teeth in Greenland sled dogs

    DEFF Research Database (Denmark)

    Kortegaard, H E; Anthony Knudsen, T; Dahl, S;

    2015-01-01

     · 8% in dogs without pulp exposure (n = 133) resulting in a significant (relative risk, 109 · 5; P < 0 · 001) risk of periapical pathology in teeth with pulp exposure compared to teeth without pulp exposure. CLINICAL SIGNIFICANCE: The high risk of periapical pathology observed in teeth with pulp...... exposure confirms that these teeth should not be neglected in affected dogs....

  15. A Curriculum Vitae of Teeth: Evolution, Generation, Regeneration

    OpenAIRE

    Koussoulakou, Despina S.; Margaritis, Lukas H; Koussoulakos, Stauros L.

    2009-01-01

    The ancestor of recent vertebrate teeth was a tooth-like structure on the outer body surface of jawless fishes. Over the course of 500,000,000 years of evolution, many of those structures migrated into the mouth cavity. In addition, the total number of teeth per dentition generally decreased and teeth morphological complexity increased. Teeth form mainly on the jaws within the mouth cavity through mutual, delicate interactions between dental epithelium and oral ectomesenchyme. These interacti...

  16. PIXE analysis of trace elements in cetacean teeth

    International Nuclear Information System (INIS)

    PIXE was adopted for analysis of trace elements in teeth of two species of cetaceans, sperm whale (Physeter microcephalus) and pantropical spotted dolphin (Stenella attenuata). The analyses were performed along with the growth layer of the teeth, which is formed annually, suitable for age determination. Mn, Fe, Cu, Zu and Sr were detected in the teeth of sperm whale and pantropical spotted dolphin. Among these trace elements, gradual increase was observed for Zn/Ca ratio in the sperm whale's teeth. (author)

  17. Carisolv as an endodontic irrigant in deciduous teeth: An SEM study

    Directory of Open Access Journals (Sweden)

    Parul Singhal

    2012-01-01

    Full Text Available Aim: Root canal irrigation plays an important role in the debridement and disinfection of the root canal system. "The purpose of this study was to evaluate the efficacy of Carisolv TM , 1% sodium hypochlorite (NaOCl gel, and 1% NaOCl solution as root canal irrigants in deciduous anterior teeth." Materials and Methods: Thirty-six extracted deciduous anterior teeth were used. Root canals were flooded with NaOCl solution in Group A, NaOCl gel in Group B and Carisolv TM in Group C and incubated for 30 min. Scanning electron microscope photomicrographs of canal wall debris in the apical, middle and coronal thirds were scored. Results: The results showed that regardless of irrigation regime, canals were consistently cleaner in the coronal and middle thirds than in the apical thirds. NaOCl solution, NaOCl gel, and Carisolv TM had comparable activity at coronal third and middle third of root canals. At the apical third, NaOCl solution cleaned canals better than NaOCl gel and Carisolv TM . Carisolv TM cleaned debris better than NaOCl gel at the apical third. Conclusion: Carisolv TM can be used as an adjunct to root canal preparation.

  18. Bovine teeth as substitute for human teeth in dental research: a review of literature.

    Science.gov (United States)

    Yassen, Ghaeth H; Platt, Jeffrey A; Hara, Anderson T

    2011-09-01

    The aim of this paper was to review in vitro and in situ studies that directly compared the use of bovine teeth as a substitute for human teeth in dental experiments. A PubMed search was conducted for papers published from 1953 to December 30, 2010 using the following keywords: "human bovine enamel" or "human bovine dentin" or "human bovine teeth". The abstracts of the studies resulting from the keyword search were read, and all papers that compared human and bovine teeth were fully read. Only original articles written in English and directly comparing human and bovine substrates were included in the review. The search was supplemented by manual searches of the reference lists from each identified paper. Out of 76 studies initially selected, 68 fulfilled the selection criteria for inclusion. The studies covered seven categories: dental morphology, chemical composition, physical properties, dental caries, dental erosion/abrasion, bonding/adhesive strength, and marginal microleakage. Inconsistent data exist regarding whether bovine teeth can be considered an appropriate substitute for human teeth in dental research. Morphological, chemical compostion and physical property differences between the two substrates must be considered when interpreting results obtained from any experiment using bovine tooth substrate. PMID:21959653

  19. Efficacy of various eugenol and non-eugenol root canal sealers in the treatment of teeth with periapical radiolucent area--a clinical and radiological study.

    OpenAIRE

    Bal C; Sikri V; Agrawal R

    1990-01-01

    A clinical and radiological study was conducted to compare the efficacy of various eugenol containing Viz. Zinc oxide eugenol, CRCS and Rosen′s Cement and non eugenol containing sealers and N2 on forty eight non-vital anterior teeth, with a periapical radiolucent area of 1-7mm in diameter. The patients were recalled after 30,90,150 and 210 days On radiological examination after 210 days CRCS showed maximum decrease in periapical radiolucency from 4.39 mm. to 1.80mm. The teeth treated w...

  20. 21 CFR 872.6475 - Heat source for bleaching teeth.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Heat source for bleaching teeth. 872.6475 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6475 Heat source for bleaching teeth. (a) Identification. A heat source for bleaching teeth is an AC-powered device that consists of...

  1. Whitening non vital teeth – a case report

    OpenAIRE

    Moraru, Iren; Ţuculină, Mihaela; Bătăiosu, Marilena; Gheorghiţă, Lelia; Diaconu, Oana

    2012-01-01

    Commonly used in cosmetic dentistry teeth whitening can be used combined with other restorative techniques during dental treatment. Non-vital teeth whitening is necessary whenever we need an improvement of their aspect, as it’s a known fact that these teeth can have a grey or pink-grey coloration when they are not correctly endodontical treated.

  2. Natal teeth in an infant with congenital hypothyroidism

    Directory of Open Access Journals (Sweden)

    C Venkatesh

    2011-01-01

    Full Text Available Teeth erupting at birth are referred to as natal teeth. It is a common and benign finding in the neonatal period. However, they may be associated with genetic syndromes like Ellis Van Creveld syndrome and Hallermann-Streiff syndrome. We report here a case of natal teeth in an infant with congenital hypothyroidism.

  3. Anterior dental evolution in the Australopithecus anamensis-afarensis lineage.

    Science.gov (United States)

    Ward, Carol V; Plavcan, J Michael; Manthi, Fredrick K

    2010-10-27

    Australopithecus anamensis is the earliest known species of the Australopithecus-human clade and is the likely ancestor of Australopithecus afarensis. Investigating possible selective pressures underlying these changes is key to understanding the patterns of selection shaping the origins and early evolution of the Australopithecus-human clade. During the course of the Au. anamensis-afarensis lineage, significant changes appear to occur particularly in the anterior dentition, but also in jaw structure and molar form, suggesting selection for altered diet and/or food processing. Specifically, canine tooth crown height does not change, but maxillary canines and P(3)s become shorter mesiodistally, canine tooth crowns become more symmetrical in profile and P(3)s less unicuspid. Canine roots diminish in size and dimorphism, especially relative to the size of the postcanine teeth. Molar crowns become higher. Tooth rows become more divergent and symphyseal form changes. Dietary change involving anterior dental use is also suggested by less intense anterior tooth wear in Au. afarensis. These dental changes signal selection for altered dietary behaviour and explain some differences in craniofacial form between these taxa. These data identify Au. anamensis not just as a more primitive version of Au. afarensis, but as a dynamic member of an evolving lineage leading to Au. afarensis, and raise intriguing questions about what other evolutionary changes occurred during the early evolution of the Australopithecus-human clade, and what characterized the origins of the group. PMID:20855307

  4. Anterior dental evolution in the Australopithecus anamensis–afarensis lineage

    Science.gov (United States)

    Ward, Carol V.; Plavcan, J. Michael; Manthi, Fredrick K.

    2010-01-01

    Australopithecus anamensis is the earliest known species of the Australopithecus–human clade and is the likely ancestor of Australopithecus afarensis. Investigating possible selective pressures underlying these changes is key to understanding the patterns of selection shaping the origins and early evolution of the Australopithecus–human clade. During the course of the Au. anamensis–afarensis lineage, significant changes appear to occur particularly in the anterior dentition, but also in jaw structure and molar form, suggesting selection for altered diet and/or food processing. Specifically, canine tooth crown height does not change, but maxillary canines and P3s become shorter mesiodistally, canine tooth crowns become more symmetrical in profile and P3s less unicuspid. Canine roots diminish in size and dimorphism, especially relative to the size of the postcanine teeth. Molar crowns become higher. Tooth rows become more divergent and symphyseal form changes. Dietary change involving anterior dental use is also suggested by less intense anterior tooth wear in Au. afarensis. These dental changes signal selection for altered dietary behaviour and explain some differences in craniofacial form between these taxa. These data identify Au. anamensis not just as a more primitive version of Au. afarensis, but as a dynamic member of an evolving lineage leading to Au. afarensis, and raise intriguing questions about what other evolutionary changes occurred during the early evolution of the Australopithecus–human clade, and what characterized the origins of the group. PMID:20855307

  5. Pulpectomy procedures in primary molar teeth

    Directory of Open Access Journals (Sweden)

    Hany Mohamed Aly Ahmed

    2014-01-01

    Full Text Available Premature loss of primary molars can cause a number of undesirable consequences including loss of arch length, insufficient space for erupting premolars and mesial tipping of the permanent molars. Pulpectomy of primary molar teeth is considered as a reasonable treatment approach to ensure either normal shedding or a long-term survival in instances of retention. Despite being a more conservative treatment option than extraction, efficient pulpectomy of bizarre and tortuous root canals encased in roots programmed for physiologic resorption that show close proximity to developing permanent tooth buds presents a critical endodontic challenge. This article aims to provide an overview of this treatment approach, including partial and total pulpectomy, in primary molar teeth. In addition, the recommended guidelines that should be followed, and the current updates that have been developed, while commencing total pulpectomy in primary molars are discussed.

  6. Effects of Adjacent Teeth on Caries Status of a Deciduous Tooth in 3-5 Years-Old Children

    Directory of Open Access Journals (Sweden)

    S Afroughi

    2010-10-01

    Full Text Available Introduction & Objective: Based on the carried out studies, the prevalence of dental caries in preschool children is high and ranges from 31.64 to 83.7 percents in Iran. The dmft criterion is not able to compute the impact of neighboring teeth on caries status of a tooth in deciduous teeth. The purpose of this study was to investigate the above issue in a sample of 3-5 years old children in Tehran during 2008-2009. Materials & Methods: In this cross-sectional study, a group of 400, 3–5 years old children who lived in Tehran and referred to Pediatric Dentistry Department of the Dentistry Faculty of Tehran University of Medical Sciences, Iran, for treatment of their deciduous teeth were investigated The demographic variables and mouth health cares data were collected by a questionnaire and the caries status of deciduous teeth were diagnosed by standard methods. The caries statuses were considered as spatially correlated binary data. The auto logistic regression model was implemented for inspecting the association of a tooth and its neighboring teeth which consists of two adjacent teeth and the opponent tooth. The effects of factors were tested using z-score. Results: The fitted model and the computed criteria showed that there was a strong dependency between caries statuses of a tooth and its three neighbors (including the two adjacent and the vertically opponent teeth (p=0.0001. Also the effect of spatial auto covariate which is equivalent to the sum of statuses of nearest neighbors of a tooth is highly significant. Furthermore, the effects of local variables such as jaw and posterior-anterior positions were also highly significant (p=0.0001. Conclusions: In deciduous teeth, the three nearest neighbors have a high effect on a tooth. As a result, the teeth in maxilla and posterior locations are decayed sooner than the other ones. These findings may be considered in preventive programs of health of mouth and tooth in children.

  7. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... Taperloc Microplasty stem and E-poly antioxidant-infused technology during a hip replacement through the anterior supine ... renewed interest at this time due to several advantages that it brings. The approach that is performed ...

  8. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... an anterior approach total hip replacement with the patient on a regular OR table supine. My name ... less invasive without being small incision surgery. Obese patients can be easier due to less distribution of ...

  9. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... it to have any real negative or deleterious effect by removing the anterior capsule. Now I would ... is what happens with one of the competitive designs. Like I told you, I just take a ...

  10. Anterior approach for knee arthrography

    International Nuclear Information System (INIS)

    Objective. To develop a new method of magnetic resonance arthrography (MRA) of the knee using an anterior approach analogous to the portals used for knee arthroscopy.Design. An anterior approach to the knee joint was devised mimicking anterior portals used for knee arthroscopy. Seven patients scheduled for routine knee MRA were placed in a decubitus position and under fluoroscopic guidance a needle was advanced from a position adjacent to the patellar tendon into the knee joint. After confirmation of the needle tip location, a dilute gadolinium solution was injected.Results and conclusion. All the arthrograms were technically successful. The anterior approach to knee MRA has greater technical ease than the traditional approach with little patient discomfort. (orig.)

  11. Microprobe analysis of teeth by synchrotron radiation: environmental contamination

    International Nuclear Information System (INIS)

    An X-ray fluorescence set-up with microprobe capabilities, installed at the Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE) synchrotron (France) was used for elemental determination in teeth. To evaluate the influence of living habits in dental elemental composition nine teeth collected post-mortem were analysed, five from a miner and four from a fisherman. All teeth from the fisherman were healthy. From the miner some teeth were carious and one of them was filled with metallic amalgam. Teeth were sliced under the vertical plane and each slice was scanned from the root to the enamel for elemental profile determination. The synchrotron microprobe resolution was of 100 μm and incident photons of 18 keV energy were used. The elemental concentration values found suggest heterogeneity of the teeth material. Moreover, the distinct profiles for Mn, Sr, Br and Pb were found when teeth from the miner and from the fisherman are compared which can be associated with dietary habits and environmental influence. Higher concentrations of Mn and Sr were found for the fisherman teeth. In addition, Br was only observed in this group of teeth. Pb levels are higher for the miner teeth in particular for dentine regions. The influence of amalgam, such as, increase of Zn and Hg contents in the teeth material, is only noticed for the immediate surroundings of the treated cavity

  12. Microprobe analysis of teeth by synchrotron radiation: environmental contamination

    Energy Technology Data Exchange (ETDEWEB)

    Pinheiro, T. E-mail: murmur@itn1.itn.pt; Carvalho, M.L.; Casaca, C.; Barreiros, M.A.; Cunha, A.S.; Chevallier, P

    1999-09-02

    An X-ray fluorescence set-up with microprobe capabilities, installed at the Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE) synchrotron (France) was used for elemental determination in teeth. To evaluate the influence of living habits in dental elemental composition nine teeth collected post-mortem were analysed, five from a miner and four from a fisherman. All teeth from the fisherman were healthy. From the miner some teeth were carious and one of them was filled with metallic amalgam. Teeth were sliced under the vertical plane and each slice was scanned from the root to the enamel for elemental profile determination. The synchrotron microprobe resolution was of 100 {mu}m and incident photons of 18 keV energy were used. The elemental concentration values found suggest heterogeneity of the teeth material. Moreover, the distinct profiles for Mn, Sr, Br and Pb were found when teeth from the miner and from the fisherman are compared which can be associated with dietary habits and environmental influence. Higher concentrations of Mn and Sr were found for the fisherman teeth. In addition, Br was only observed in this group of teeth. Pb levels are higher for the miner teeth in particular for dentine regions. The influence of amalgam, such as, increase of Zn and Hg contents in the teeth material, is only noticed for the immediate surroundings of the treated cavity.

  13. Transplantation of Cryopreserved Teeth: A Systematic Review

    OpenAIRE

    Osathanon, Thanaphum

    2010-01-01

    The aim of this article was to examine the research articles regarding biological and mechanical properties of cryopreserved teeth for potential use in tooth transplantation. A systematic review of literatures was performed by Pubmed searching with assigned key words from January 1, 1990 to June 8, 2009. All articles were examined for inclusion criteria. Secondary search was conducted by hand-search through references of included articles from primary search. A total of 24 articles were obtai...

  14. Resistance to cyclic loading of teeth restored with posts

    DEFF Research Database (Denmark)

    Sahafi, A; Peutzfeldt, A; Ravnholt, G;

    2005-01-01

    This in vitro study evaluated the effect of presence of post, presence of core, and of shape, type, and surface treatment of posts on resistance to cyclic loading of crowned human teeth. For all teeth, crowns designed without ferrule were cast in sterling silver and luted with resin cement (Panavia...... F). Each tooth underwent cyclic loading of 600 N at two loads per second until failure. Teeth that had only been crowned showed significantly higher resistance to cyclic loading than teeth with cores or with post and cores. No significant differences were found between teeth restored with cores only...... or with post and cores, irrespective of surface-treatment of the posts. Teeth restored with parallel-sided cast post (ParaPost XP) and cores showed significantly higher resistance to cyclic loading than teeth with either tapered cast posts or untreated prefabricated posts of titanium alloy (Para...

  15. Travoprost Induced Granulomatous Anterior Uveitis

    OpenAIRE

    Patrick Chiam

    2011-01-01

    Purpose. To report a case of granulomatous anterior uveitis caused by travoprost. Methods. Single observational case report. Results. A 71-year-old who was fit and healthy presented with bilateral granulomatous anterior uveitis 2 months after he was started on travoprost in both eyes. There was no past history of uveitis. Blood test and radiological investigation were unremarkable. Travoprost was stopped. The uveitis resolved on topical steroid treatment. A rechallenge with travoprost was att...

  16. Update on anterior ankle impingement

    OpenAIRE

    Vaseenon, Tanawat; Amendola, Annunziato

    2012-01-01

    Anterior ankle impingement results from an impingement of the ankle joint by a soft tissue or osteophyte formation at the anterior aspect of the distal tibia and talar neck. It often occurs secondary to direct trauma (impaction force) or repetitive ankle dorsiflexion (repetitive impaction and traction force). Chronic ankle pain, swelling, and limitation of ankle dorsiflexion are common complaints. Imaging is valuable for diagnosis of the bony impingement but not for the soft tissue impingemen...

  17. Anterior chamber depth during hemodialysis

    Directory of Open Access Journals (Sweden)

    Gracitelli CPB

    2013-08-01

    Full Text Available Carolina Pelegrini Barbosa Gracitelli,1 Francisco Rosa Stefanini,1 Fernando Penha,1 Miguel Ângelo Góes,2 Sérgio Antonio Draibe,2 Maria Eugênia Canziani,2 Augusto Paranhos Junior1 1Ophthalmology Department, 2Division of Nephrology, Federal University of São Paulo – UNIFESP, São Paulo, Brazil Background: Exacerbation of chronic glaucoma or acute glaucoma is occasionally observed in patients undergoing hemodialysis (HD because of anterior chamber depth changes during this therapy. Purpose: To evaluate anterior chamber depth and axial length in patients during HD sessions. Methods: A total of 67 eyes of 35 patients were prospectively enrolled. Axial length and anterior chamber depth were measured using ultrasonic biometry, and these measures were evaluated at three different times during HD sessions. Body weight and blood pressure pre- and post-HD were also measured. Results: There was no difference in the axial length between the three measurements (P = 0.241. We observed a significantly decreased anterior chamber depth (P = 0.002 during HD sessions. Conclusion: Our results support the idea that there is a change in anterior chamber depth in HD sessions. Keywords: anterior chamber, hemodialysis, axial length, acute angle-closure glaucoma

  18. Prevalence of permanent anterior tooth fracture due to trauma in South Indian population

    Directory of Open Access Journals (Sweden)

    Mithra Nidharsh Hegde

    2015-01-01

    Full Text Available Aim: The aim of the study is to determine the prevalence of permanent anterior teeth fracture due to trauma in South Indian population. Materials and Methods: After formal consent, study was conducted on 2000 patients reporting for treatment in A B Shetty Memorial Institute of Dental Sciences and Rural Satellite Centers from June to December 2013. They were examined under good illumination using sterilized mouth mirror, explorer and cotton rolls. Results were evaluated using Pearson Chi-square test. Results: Of 2000 patients, overall prevalence of anterior teeth fracture due to trauma was 14.85%, 53.9% cases were noticed in the age group of 15-30 years, 20.2% cases in an age group of 12-15 years. Of 14.85% (297 cases, 53.9% males and 46.1% females had anterior teeth fracture, 88.67% cases were with respect to maxillary arch and 11.33% cases were with respect to mandibular arch. 43.9% patients had enamel and dentin fracture, only enamel fracture was seen in 31.6% patients and the least was 6.01% which showed displacement of tooth without crown or root fracture, 67% were because of falls and rest of the 33% of patients had anterior tooth fracture because of violence, sports and traffic accidents, 71.42% cases had fracture with maxillary central incisor. Furthermore, 59.6% cases were seen with Class II Division I malocclusion. Conclusions: In the present study we noticed that fall was the most frequent cause and are seen more in males with an increased prevalence in 15-30 years of age. Furthermore, fracture of maxillary central incisor was most common and among all, fractures involving enamel and dentin were most common.

  19. Anticoagulation after anterior myocardial infarction and the risk of stroke.

    Directory of Open Access Journals (Sweden)

    Jacob A Udell

    Full Text Available BACKGROUND: Survivors of anterior MI are at increased risk for stroke with predilection to form ventricular thrombus. Commonly patients are discharged on dual antiplatelet therapy. Given the frequency of early coronary reperfusion and risk of bleeding, it remains uncertain whether anticoagulation offers additional utility. We examined the effectiveness of anticoagulation therapy for the prevention of stroke after anterior MI. METHODS AND FINDINGS: We performed a population-based cohort analysis of 10,383 patients who survived hospitalization for an acute MI in Ontario, Canada from April 1, 1999 to March 31, 2001. The primary outcome was four-year ischemic stroke rates compared between anterior and non-anterior MI patients. Risk factors for stroke were assessed by multivariate Cox proportional-hazards analysis. Warfarin use was determined at discharge and followed for 90 days among a subset of patients aged 66 and older (n = 1483. Among the 10,383 patients studied, 2,942 patients survived hospitalization for an anterior MI and 20% were discharged on anticoagulation therapy. Within 4 years, 169 patients (5.7% were admitted with an ischemic stroke, half of which occurred within 1-year post-MI. There was no significant difference in stroke rate between anterior and non-anterior MI patients. The use of warfarin up to 90 days was not associated with stroke protection after anterior MI (hazard ratio [HR], 0.68; 95% confidence interval [CI], 0.37-1.26. The use of angiotensin-converting-enzyme inhibitors (HR, 0.65; 95% CI, 0.44-0.95 and beta-blockers (HR, 0.60; 95% CI, 0.41-0.87 were associated with a significant decrease in stroke risk. There was no significant difference in bleeding-related hospitalizations in patients who used warfarin for up to 90 days post-MI. CONCLUSION: Many practitioners still consider a large anterior-wall MI as high risk for potential LV thrombus formation and stroke. Among a cohort of elderly patients who survived an anterior

  20. Lever-arm and mini-implant system for anterior torque control during retraction in lingual orthodontic treatment.

    Science.gov (United States)

    Hong, Ryoon-Ki; Heo, Jung-Min; Ha, Young-Ki

    2005-01-01

    Anterior torque control during retraction is difficult to achieve with lingual orthodontic treatment. This article describes the use of a lever-arm and mini-implant system as absolute anchorage for controlled retraction of the anterior teeth during lingual orthodontic treatment and evaluates 2 protrusion cases treated with this system. Various clinical situations are discussed and analyzed from a biomechanical standpoint. Mini-implants are needed to control the point of force application in the posterior area and produce en masse retraction with no anchorage loss. When the length of the lever-arm is adjusted to the position of the mini-implant, the desired line of action of the retraction force with respect to the center of resistance of the anterior segment is selected. Controlled retraction of the anterior teeth was achieved with no loss of anchorage. The mini-implant, in conjunction with the lever-arm, is useful not only for absolute anchorage but also for anterior torque control during retraction in lingual orthodontic treatment. PMID:15747828

  1. Maxillary anterior tooth dimensions and proportions in an Irish young adult population.

    LENUS (Irish Health Repository)

    Condon, M

    2011-07-01

    This study was undertaken in a young Irish population to determine the dimensions and ratios of the six maxillary anterior teeth. One hundred and nine Irish subjects (age 18-25 inclusive) had irreversible hydrocolloid impressions made of their maxillary dentition poured in type V stone. Clinical crown dimensions were measured with a digital calliper. The stone casts were digitally photographed in a standardised manner enabling calculation of various ratios between the maxillary anterior teeth. Sexual dimorphism existed for various tooth dimensions; most notably canine teeth were in the region of 0·8 mm longer and 0·6 mm wider in males. Central and lateral incisors were found to be 0·5 mm wider in males. It is, therefore, recommended that dimensional tooth guidelines should be given for each of the sexes and not on a population basis. With regard to tooth proportion ratios, no significant differences were found between genders or the left and right sides for any of the measurements or ratios measured. The digitally recorded tooth proportions were similar for both sexes, and the Golden Proportion guidelines could only be applied to the lateral incisor\\/central incisor widths (0·618). Identified width proportions for the canine\\/central incisor were 0·58 and for canine\\/lateral incisor 0·89.

  2. Numerical Simulation Of Cutting Of Gear Teeth

    Science.gov (United States)

    Oswald, Fred B.; Huston, Ronald L.; Mavriplis, Dimitrios

    1994-01-01

    Shapes of gear teeth produced by gear cutters of specified shape simulated computationally, according to approach based on principles of differential geometry. Results of computer simulation displayed as computer graphics and/or used in analyses of design, manufacturing, and performance of gears. Applicable to both standard and non-standard gear-tooth forms. Accelerates and facilitates analysis of alternative designs of gears and cutters. Simulation extended to study generation of surfaces other than gears. Applied to cams, bearings, and surfaces of arbitrary rolling elements as well as to gears. Possible to develop analogous procedures for simulating manufacture of skin surfaces like automobile fenders, airfoils, and ship hulls.

  3. Natural α-radionuclides in children's teeth

    International Nuclear Information System (INIS)

    Natural α-radiation has been linked epidemiologically to the induction of childhood leukaemia. In 1996 COMARE reported that 14% of UK childhood leukaemia incidence could be attributed to natural α-radiation exposure. Two thirds of the total radiation dose to the red bone marrow has been estimated to originate from long lived α-radionuclides, principally 210Pb supported 210Po and 226Ra, accumulated in the skeleton. The concept of using teeth as an analogue measure of the pollutant burden of bone is well established in studies examining the effect of stable lead uptake in children. This study explores the potential for using teeth as a bioassay of cumulated α-activity uptake in order to identify population sub-groups at risk from enhanced levels of α-radionuclides in bone. The spatial and temporal distributions of α-activity across the tooth structure have been examined, with the particular aim of identifying a component part suitable for use as an assay of cumulative α-activity uptake. Significant variations in α-activity concentration have been found in relation to tooth type, donor age and tooth component part. The outer surface of permanent teeth is shown to significantly accumulate α-activity over the lifetime of the tooth and this measure forms the basis of the tooth bioassay. The tooth bioassay has been used to identify variation in the natural α-radiation exposure of individuals within the study population, resulting from geographical and environmental differences. Multiple linear regression analysis has been used to model the relationship between the α-activity concentration on the outer surface of permanent teeth and the morphological and environmental factors that affect it. Human uptake of 210Pb has been assessed and the relative importance of exposure pathways, such as ingestion and inhalation, compared. Uptake values under a variety of conditions have been used in conjunction with the Salmon 210Pb dosimetry model to obtain bone activity

  4. Histological appearance of postmortem pink teeth: Report of two cases

    Directory of Open Access Journals (Sweden)

    B K Charan Gowda

    2015-01-01

    Full Text Available This article presents images and histological changes in the dentin of two cases involving posmortem pink teeth. Postmortem pink teeth were noted among two deceased male individuals. Pink teeth were noted during autopsy examination after twelve days in one corpse, and eight days following death in the second case. During the examination decomposition and putrefaction of the body was noted. Cause of death was drowning in one case and haemorrhages and shock in another. A central incisor tooth was obtained from each body. Both teeth exhibited a pink appearance and the intensity was more pronounced in the cervical region. Although pink teeth can be noted in death due to asphyxia, carbon monoxide poisoning and so on, it is necessary to study the exact role behind the appearance of pink teeth and try to incorporate the finding medico legally.

  5. Travoprost Induced Granulomatous Anterior Uveitis

    Science.gov (United States)

    Chiam, Patrick

    2011-01-01

    Purpose. To report a case of granulomatous anterior uveitis caused by travoprost. Methods. Single observational case report. Results. A 71-year-old who was fit and healthy presented with bilateral granulomatous anterior uveitis 2 months after he was started on travoprost in both eyes. There was no past history of uveitis. Blood test and radiological investigation were unremarkable. Travoprost was stopped. The uveitis resolved on topical steroid treatment. A rechallenge with travoprost was attempted in one eye. The inflammation recurred in this eye only. This subsided with the cessation of travoprost alone without topical steroid. Conclusion. This is the first case report of travoprost causing granulomatous anterior uveitis. The uveitis recurred with a rechallenge. Changing the prostaglandin analogue to another topical treatment may be adequate to cease the inflammation. PMID:22606464

  6. Replacement of Anterior Composite Resin Restorations Using Conservative Ceramics for Occlusal and Periodontal Rehabilitation: An 18-Month Clinical Follow-Up.

    Science.gov (United States)

    da Cunha, Leonardo Fernandes; Prochnow, Rayane Alexandra; Costacurta, Adriana Osten; Gonzaga, Carla Castiglia; Correr, Gisele Maria

    2016-01-01

    This case report describes a patient with discolored and fractured composite resin restorations on the anterior teeth in whom substitution was indicated. After wax-up and mock-up, the composite was removed and replaced with minimally invasive ceramic laminates. An established and predictable protocol was performed using resin cement. Minimally invasive ceramic restorations are increasingly being used to replace composite restorations. This treatment improves the occlusal and periodontal aspects during the planning and restorative phases, such as anterior guides, and laterality can be restored easily with ceramic laminates. In addition, the surface smoothness and contour of ceramic restorations do not affect the health of the surrounding periodontal tissues. Here we present the outcome after 18 months of clinical follow-up in a patient in whom composite resin restorations in the anterior teeth were replaced with minimally invasive ceramic laminates. PMID:27555970

  7. Replacement of Anterior Composite Resin Restorations Using Conservative Ceramics for Occlusal and Periodontal Rehabilitation: An 18-Month Clinical Follow-Up

    Science.gov (United States)

    Prochnow, Rayane Alexandra; Costacurta, Adriana Osten; Correr, Gisele Maria

    2016-01-01

    This case report describes a patient with discolored and fractured composite resin restorations on the anterior teeth in whom substitution was indicated. After wax-up and mock-up, the composite was removed and replaced with minimally invasive ceramic laminates. An established and predictable protocol was performed using resin cement. Minimally invasive ceramic restorations are increasingly being used to replace composite restorations. This treatment improves the occlusal and periodontal aspects during the planning and restorative phases, such as anterior guides, and laterality can be restored easily with ceramic laminates. In addition, the surface smoothness and contour of ceramic restorations do not affect the health of the surrounding periodontal tissues. Here we present the outcome after 18 months of clinical follow-up in a patient in whom composite resin restorations in the anterior teeth were replaced with minimally invasive ceramic laminates. PMID:27555970

  8. The selection and arrangement of artificial teeth for complete dentures%全口义齿人工牙的选择与排列

    Institute of Scientific and Technical Information of China (English)

    吴国锋

    2012-01-01

    The selection and arrangement of artificial teeth are the key steps for complete denture manufacture. Those important factors influence the shape, size and mold of artificial teeth in the denture. Occlusion is the major consideration of posterior teeth which includes anatomic , semi- anatomic and nonanatomic ( e. G. Lingualized occlusion ) types of the teeth. It is the arrangement of the teeth that governs the contour of the lips, at rest and in speech. The most natural appearance of anterior teeth can be obtained when "denture face" ( with too perfect symmetry and regularity of the artificial teeth arrangement ) is avoided. For the setting of posterior teeth stable denture occlusion requires preservation of posterior centric occlusal stop. The trial denture appointment is used to evaluate and change, if necessary, the mold, shape and esthetic effects of anterior teeth, centric relation, and other characteristics of the denture before final processing.%选牙与排牙是全口义齿制作的关键步骤之一.前牙选择的要素包括人工牙的形态、大小和颜色.后牙则主要考虑(牙合)型,一般包括三种类型:解剖式牙、半解剖式牙、非解剖式牙(例如舌向集中(牙合)型牙).排列前牙对于恢复患者唇部正常外形以及改善发音都有重要影响,应尽量避免左右牙齿过于对称而引起的"假牙面容".后牙排列则侧重恢复咬合功能.全口义齿完成选牙和排牙后应进行临床试戴,目的是检查前牙美观是否满意、基托边缘是否合适、咬合是否良好等.

  9. Triplication of Deciduous Teeth: A Rare Dental Anomaly

    OpenAIRE

    Suresh Yadav; Shallu Tyagi; Prince Kumar; Divya Sharma

    2013-01-01

    Fusion of teeth is the union of two or more tooth germs, which are usually separated. Depending upon the stage of odontogenesis, it can be complete or incomplete. The present case describes fusion between the maxillary primary right central and lateral incisor with a supernumerary tooth. Clinical and radiographic examination revealed the presence of fused triple teeth. The fused teeth were extracted, sectioned and were visualized under stereomicroscope at three levels and the diagnosis of fus...

  10. Anterior Maxillary Intrusion and Retraction with Corticotomy-Facilitated Orthodontic Treatment and Burstone Three Piece Intrusive Arch

    OpenAIRE

    Prabhakar, Ramachandra; M K Karthikeyan; Saravanan, R.; Kannan, K.S.; Arun Raj, M.R.

    2013-01-01

    An adult patient with proclination and spacing was performed orthodontic treatment combined with corticotomy and the burstone three piece intrusive arch who desired a shortened treatment period. The patient had Angle’s Class I malocclusion with flaring of the maxillary and mandibular incisors. Pre adjusted edgewise appliance (MBT prescription) was fixed to the maxillary and mandibular teeth. Then corticotomy was performed on the cortical bone of the buccal sides in the maxillary anterior regi...

  11. Triplication of deciduous teeth: A rare dental anomaly

    Directory of Open Access Journals (Sweden)

    Suresh Yadav

    2013-01-01

    Full Text Available Fusion of teeth is the union of two or more tooth germs, which are usually separated. Depending upon the stage of odontogenesis, it can be complete or incomplete. The present case describes fusion between the maxillary primary right central and lateral incisor with a supernumerary tooth. Clinical and radiographic examination revealed the presence of fused triple teeth. The fused teeth were extracted, sectioned and were visualized under stereomicroscope at three levels and the diagnosis of fusion of three teeth was confirmed histologically.

  12. Exodontics: extraction of teeth in the dog and cat.

    Science.gov (United States)

    Gengler, Bill

    2013-05-01

    Dental disease can have a profound effect on the comfort and well-being of pets. Oral disease can be difficult to detect. Patients often hide their discomfort. The identification and treatment or removal of diseased teeth are the responsibility of the veterinarian. When diseased teeth cannot be saved by specialized care, extraction of teeth is necessary. Proper extraction of teeth in dogs and cats can be challenging and frustrating, but with review of the oral anatomy, proper instrumentation, and gentle tissue-handling techniques, this can be a rewarding part of clinical practice. PMID:23643022

  13. Radiographic studies on the development of cheek teeth in donkeys

    International Nuclear Information System (INIS)

    The current study was carried out on 60 head specimens of donkeys in addition to five living animals. Specimens and animal's heads were radiographed. Radiographs were grouped from 1 day up to 15 years of age. Recorded data included the following points: 1) Time of radiographic appearance and different developmental stages of deciduous and permanent cheek teeth. 2) Length of deciduous cheek teeth from birth to shedding. 3) Length of permanent cheek teeth from birth to senility. 4) Body and root length from age 5 up to 15 years of age. 5) Wolf teeth: occurrence, time of eruption and shedding. All results were documented and illustrated in tables and photographs

  14. Pulp vitality preservation after traumatic dental injuries to permanent teeth

    Directory of Open Access Journals (Sweden)

    Blagojević Duška

    2013-01-01

    Full Text Available Introduction. The pulp vitality preservation after a trauma to permanent teeth is of great importance since dental injuries are common. The aim of our study was to investigate the pulp vitality preservation after tooth injuries. Material and Methods. A retrospective analysis of records of patients with a trauma was performed. The sample consisted of all patients who had been referred to the Department of Dentistry of Vojvodina for a trauma to permanent teeth during the period 2005-2010. We recorded the type of injury, treatment, state of vitality during the first visit and subsequent check-ups. Results. The study included 162 children and adolescents aged 6-18 years having a trauma to 314 permanent teeth. The most frequent type of injuries in permanent teeth was fractures (54.5%, whereas luxation was a less common trauma (45.5%. Though different kinds of traumas have different optimal time for treatment, a period of 24 hours was taken as optimal; hence, 189 teeth were treated in optimal time and 55 complications occurred in them; while 105 complications occurred in 114 teeth which were treated 24 hours after the trauma. A year after the trauma the pulp vitality was preserved in 88 teeth (32%, pulp necrosis and other complications developed in 160 teeth (68%. Conclusion. The therapy of pulp vitality preservation in injured teeth was found successful in 32% and unsuccessful in 68% of cases at check-ups over one year.

  15. Histopathologic study on irradiated human developing teeth

    International Nuclear Information System (INIS)

    The patient was a 7-year-old boy who had been suffering from Ewing's sarcoma originating in the mandible. Irradiation with 8000 rad of Linac was performed on the mandible prior to mandibulectomy. The results of the histopathologic examination of the teeth including resected material were as follows: 1. Although the tumor tissue was not found in the resected material, complete resoption of the medullar trabecular bone with fibrosis was noted in the area between the first molar region and the mandibular ramus. 2. The first and the second premolar teeth were in the early stage of root formation, and conglomerates of dysplastic dentin were formed in the proliferative zones. This dysplastic dentin was surrounded by loose fibrous connective tissues. 3. The dysplastic dentin showed low mineralization, embedded irregular arranged-fibrous tissue matrix and scattered various-sized lacunae containing a few tiny and pyknotic cells. 4. Irregularly arranged odontoblasts with a pyknotic appearance were found along the tubular dentin, but diffuse fibrosis occurred in the pulpal tissues. 5. The first molar tooth had completed its root formation. Various amounts of osteodentin were formed at the secondary dentin layer. Inner-resorption of dentin and fibrosis of the pulpal tissue were also found. These changes concerning the first molar tooth were also due to the effects of irradiation. 6. The second molar tooth was resorbed by tumor infiltration, and dysplastic dentin was on the resorbed surface of the dentin. (J.P.N.)

  16. Histopathologic study on irradiated human developing teeth

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, Yasunori (Iwate Medical Coll., Morioka (Japan). School of Dentistry)

    1982-12-01

    The patient was a 7-year-old boy who had been suffering from Ewing's sarcoma originating in the mandible. Irradiation with 8000 rad of Linac was performed on the mandible prior to mandibulectomy. The results of the histopathologic examination of the teeth including resected material were as follows: 1. Although the tumor tissue was not found in the resected material, complete resoption of the medullar trabecular bone with fibrosis was noted in the area between the first molar region and the mandibular ramus. 2. The first and the second premolar teeth were in the early stage of root formation, and conglomerates of dysplastic dentin were formed in the proliferative zones. This dysplastic dentin was surrounded by loose fibrous connective tissues. 3. The dysplastic dentin showed low mineralization, embedded irregular arranged-fibrous tissue matrix and scattered various-sized lacunae containing a few tiny and pyknotic cells. 4. Irregularly arranged odontoblasts with a pyknotic appearance were found along the tubular dentin, but diffuse fibrosis occurred in the pulpal tissues. 5. The first molar tooth had completed its root formation. Various amounts of osteodentin were formed at the secondary dentin layer. Inner-resorption of dentin and fibrosis of the pulpal tissue were also found. These changes concerning the first molar tooth were also due to the effects of irradiation. 6. The second molar tooth was resorbed by tumor infiltration, and dysplastic dentin was on the resorbed surface of the dentin.

  17. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... during a hip replacement through the anterior supine intramuscular approach. “OR-Live,” the vision of improving health. ... the approach are operating through an internervous and intramuscular anatomic interval. It’s not necessary to detach any ...

  18. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... got coming out in “JBJS,” the early six-week recovery is dramatically different between a direct lateral abductor splitting approach and this anterior supine approach. Let me get this head on. My experience, these patients have full leg control in about 24 hours. Yeah. They can get out of bed and ...

  19. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... the anterior supine intramuscular approach. “OR-Live,” the vision of improving health. Good evening and welcome to ... should know that this is done under direct vision. Yeah. You are seeing everything you’re doing. ...

  20. An ambiguous asymptomatic swelling in the maxillary anterior region—A case report

    Science.gov (United States)

    Surej Kumar, L.K.; Manuel, Suvy; Nair, Bindu J.; Nair S, Vinod

    2016-01-01

    Introduction Glandular odontogenic cyst is a rare and recently recognized type of developmental odontogenic cyst. Being odontogenic in origin, because of the pluripotentiality of the odontogenic epithelium it can show glandular or salivary features. Presentation of a case A 46 year old female patient was referred to the Oral and Maxillofacial Surgery department with chief complaint of painless swelling in the right anterior region of maxilla, radiographically associated with teeth 12, 13. Mucosa over the swelling was slightly bluish in colour and no associated palatal swelling was seen. No incidence of trauma was reported and involved teeth were not mobile. Discussion Although we have many differential diagnoses, our working diagnosis was a periapical cyst, so conventional treatment of root canal treatment, cyst enucleation, and apicoectomy was planned. Conclusion Here we present a case which was initially misdiagnosed and mismanaged but on subsequent histopathologic examination revealed the final diagnosis. PMID:27093689

  1. Biological approach for management of anterior tooth trauma: Triple case report

    Directory of Open Access Journals (Sweden)

    Puneet Goenka

    2011-01-01

    Full Text Available Anterior crown fractures are a common form of injury that mainly affect children and adolescents. The position of maxillary incisors and their eruptive pattern carries a significant risk for trauma. In the pre-adhesive era, fractured teeth needed to be restored either with pin-retained inlays or cast restorations that sacrificed healthy tooth structure, and were a challenge for clinicians to match with adjacent teeth. The development of adhesive dentistry has allowed dentists to use the patient′s own fragment to restore the fractured tooth. Three cases are presented here with complicated crown fracture of maxillary central incisors; the reattachment of the fractured tooth segment in these cases has been performed using different combinations of techniques, viz. simple reattachment, circumferential bevel and internal dentinal groove.

  2. Biological approach for management of anterior tooth trauma: Triple case report

    Directory of Open Access Journals (Sweden)

    Goenka P

    2010-09-01

    Full Text Available Anterior crown fractures are a common form of injury that mainly affect children and adolescents. The position of maxillary incisors and their eruptive pattern carries a significant risk for trauma. In the pre-adhesive era, fractured teeth needed to be restored either with pin-retained inlays or cast restorations that sacrificed healthy tooth structure and were a challenge for clinicians to match with adjacent teeth. The development of adhesive dentistry has allowed dentists to use the patient′s own fragment to restore the fractured tooth. Three cases are presented here with complicated crown fracture of maxillary central incisors; the reattachment of the fractured tooth segment in this case has been performed using different combinations of techniques, viz. simple reattachment, circumferential bevel and internal dentinal groove.

  3. Foreign Body Embedded in Anterior Chamber Angle

    Directory of Open Access Journals (Sweden)

    Shmuel Graffi

    2012-01-01

    Full Text Available Introduction. We present a case of a metallic foreign body embedded in the anterior chamber angle. After standing in close proximity to a construction worker breaking a tile, a 26-year-old woman using soft contact lens for the correction of mild myopia presented to emergency department for evaluation of a foreign body sensation of her right eye. Methods and Results. Diagnosis was confirmed by gonioscopic examination and a noncontrast CT scan of head and orbits. The foreign body was removed by an external approach without utilizing a magnet. The patient's final outcome was favorable. Discussion. The above is a rare clinical situation, which is impossible to detect on slit-lamp examination without a gonioscopic view. Proper imaging and a specific management are mandatory in order to achieve favorable outcome.

  4. Clinical Manifestations of pathology of temporomandibular joints and masticatory muscles in patients with teeth occlusion and teeth row disturbances

    Directory of Open Access Journals (Sweden)

    A.V. Lepilin

    2010-06-01

    Full Text Available The aim of the research is a literature review about the problem of temporomandibular joints and masticatory muscles in patients with teeth occlusion and teeth row disturbances. Teeth occlusion and teeth row disturbances are widespread pathology of maxillofacial area, that can lead to different pathology alterations of masticatory system including musculo-articular dysfunction. Some specialists consider that the key factor of pathogenesis of musculo-articular dysfunction is occlusion disturbances, by the other opinion - discoordination of muscle contraction. Thus occlusive and muscular disorders are leading in pathogenesis and clinic of musculo-articular dysfunction

  5. Comparative evaluation of shear bond strength of two self-etching adhesives (sixth and seventh generation on dentin of primary and permanent teeth: An in vitro study

    Directory of Open Access Journals (Sweden)

    Yaseen S

    2009-03-01

    Full Text Available Aim: The present study was undertaken to compare and evaluate shear bond strength of two self-etching adhesives (sixth and seventh generation on dentin of primary and permanent teeth. Materials and Methods: Flat dentin surface of 64 human anterior teeth (32 primary and 32 permanent divided into four groups of 16 each. Groups A and C were treated with Contax (sixth generation, while groups B and D were treated with Clearfil S3 (seventh generation. A teflon mold was used to build the composite (Filtek Z-350 cylinders on the dentinal surface of all the specimens. Shear bond strength was tested for all the specimens with an Instron Universal Testing Machine. Data were statistically analyzed using one-way ANOVA for multiple group comparison, followed by student′s unpaired ′t′ test for group-wise comparison. Results: There was no statistically significant difference in shear bond strength among the study groups except that primary teeth bonded with Contax exhibited significantly lesser shear bond strength than permanent teeth bonded with Clearfil S3. Conclusion: This study revealed that Clearfil S3 could be of greater advantage in pediatric dentistry than Contax because of its fewer steps and better shear bond strength in dentin of both primary and permanent teeth.

  6. Evaluation of antimicrobial efficacy of various root canal filling materials for primary teeth.

    Science.gov (United States)

    Pabla, T; Gulati, M S; Mohan, U

    1997-12-01

    Four materials viz. zinc oxide-eugenol, iodoform paste, Kri paste, Maisto's paste and Vitapex (Calcium hydroxide + iodoform) were tested for their antibacterial effect against the aerobic and anerobic bacteria, viz. Staphylococcus aureus, Streptococcus viridans, Streptococcus faecalis, Bacteroides melaninogenicus and mixed bacterial culture; obtained from infected non-vital deciduous anterior teeth. The antimicrobial sensitivity was checked on BHI-agar plates using well method. The results showed that all the 4 materials were distinctly different from each other in their antimicrobial activity. Maisto's paste was invariably the superior most in its antibacterial efficacy (in comparison to all the 5 micro-organism strains). Iodoformized zincoxide eugenol appeared to be the second best followed by Kri paste. Vitapex showed the least antibacterial activity. PMID:10635127

  7. Teething myths among nursing mothers in a Nigerian community

    Directory of Open Access Journals (Sweden)

    Opeodu Olanrewaju Ige

    2013-01-01

    Full Text Available Background: Many symptoms had been associated with teething in children with the possibility of overlooking potentially fatal condition. Symptoms that had been associated with teething include diarrhoea, fever, vomiting and cough. The possibility that any of these symptoms could have been due to other causes call for thorough investigation of the child before concluding that it is only "teething". Objectives: The study was carried out to assess the beliefs of nursing mothers concerning symptoms that are associated with teething among children and to identify those that would seek medical treatments in case of their children having such symptoms during teething. Materials and Methods: Two hundred and ninety nursing mothers whose children had erupted at least a tooth were interviewed in the immunisation clinics of the University College Hospital and Adeoyo Maternity Teaching Hospital, both in Ibadan, Nigeria, on their beliefs and practice concerning teething in children. Results: One hundred and eighty-eight (64.8% of the mothers associated symptoms such as fever, cough, catarrh and diarrhoea with eruption of teeth in their children. Over half of the women agreed that a child having either fever (51.0%, ear infection (57.6% or cough (50.3% should be promptly taken for medical consultation and not be tagged "teething", while for other symptoms such as gum pain (74.5%, sleepless night (56.6%, vomiting (51.4% and diarrhoea (51.7%, over half of the mothers believed that the symptoms will resolve following the eruption of the teeth. Conclusion: The study demonstrated that mothers in the study attributes several symptoms to teething, which could be detrimental to the survival of their children as the symptom could have been due to other causes. There is, therefore, need for public enlightenment to create awareness on the possible effect of presumptuous belief that childhood diseases are due to teething process.

  8. Child lead exposure determined from measurement of x-ray fluorescence of teeth in situ

    International Nuclear Information System (INIS)

    X-ray fluorescence from lead when irradiated by gamma rays from a Co-57 source was utilized to measure the lead concentration in children's teeth in situ. The sensitivity of the method was adequate to detect 15 ppM from a gamma ray exposure to the tooth approximately 1/10 the exposure of a routine dental x-ray examination. The tooth lead levels assayed using x-ray fluorescence correlated well with chemical assay techniques for both extracted permanent and shed primary teeth. Thirty children from the Children's Hospital of Philadelphia suspected of having elevated lead levels had tooth lead levels measured in situ determined using the x-ray fluorescent technique. The tooth lead concentration varied from a low of 16 ppM to a high of 56 ppM

  9. Maternal diets, nutritional status, and zinc in contemporary Mexican infants' teeth: Implications for reconstructing paleodiets.

    Science.gov (United States)

    Dolphin, Alexis E; Goodman, Alan H

    2009-11-01

    Despite attempts to use zinc (Zn) concentrations in hard tissues to comment upon the degree of carnivory in past populations, zinc has yielded inconsistent trophic level effects. The question of what, if anything, zinc in human enamel reveals regarding past diets is the focus of this research. We test whether the zinc content of deciduous tooth enamel from contemporary Mexican infants varies by maternal dietary variables such as zinc intake, proportion of animal products consumed, and dietary components that are known to impact zinc absorption. Deciduous teeth were collected from former participants in a longitudinal study of maternal and infant diet and function in highland Mexico. The Zn/Ca ratios of both prenatal and postnatal regions of 37 anterior teeth representing 26 individuals were assessed via laser ablation-inductively coupled plasma-mass spectrometry. Maternal dietary data collected during lactation were not correlated with zinc levels in the early postnatal enamel of infants' teeth, which were forming at the same time. In the case of prenatal enamel, zinc values were correlated with the consumption of foods known to influence Zn bioavailability, most notably tortillas (P = 0.008; r = 0.510), but not with meat consumption. Unexpectedly, women who consumed diets with poor zinc bioavailability during pregnancy gave birth to infants whose prenatal enamel demonstrated the highest Zn/Ca ratios, possibly due to enhanced zinc absorption during pregnancy for those mothers suffering most from long-term micronutrient deficiency. These results would suggest that zinc is not a reliable trophic level indicator. PMID:19373846

  10. Neanderthal teeth from Moula-Guercy, Ardèche, France.

    Science.gov (United States)

    Hlusko, Leslea J; Carlson, Joshua P; Guatelli-Steinberg, Debbie; Krueger, Kristin L; Mersey, Ben; Ungar, Peter S; Defleur, Alban

    2013-07-01

    Here we describe dental remains from a Neanderthal fossil assemblage from Moula-Guercy, France. Our report demonstrates that the Moula-Guercy hominid remains contribute important morphological, developmental, and behavioral data to understanding Neanderthal evolutionary history. We include gross comparative morphological descriptions and enamel surface microstructure and microwear data. These teeth reveal numerous characteristics that are diagnostic of Neanderthals and provide no evidence for the presence of any other hominid taxa. Enamel growth increment data from the Moula-Guercy specimens yield evidence of a Neanderthal pattern of development, although at the lower end of the range of variation. The presence of a significant number of linear enamel hypoplasias indicates that these individuals were stressed during childhood. Molar microwear data suggest that these Neanderthals did not differ significantly from modern humans in terms of the fracture properties of the food they were consuming. The incisor microwear and macro striations provide evidence that these individuals may have been using their anterior teeth as tools, similar to the practices of several modern human populations such as the Inuit, Ipiutak, and Australian Aboriginals, and reminiscent of evidence from other Neanderthals from Krapina, Croatia, as well as the 600,000 year old hominids from Sima de los Huesos, Spain. Am J Phys Anthropol 151:477-491, 2013.© 2013 Wiley Periodicals, Inc. PMID:23737145

  11. Congenital grooves and cervical enamel projections on the teeth and their relation to periodontal status

    Directory of Open Access Journals (Sweden)

    G.V. Prashanth

    2014-04-01

    Full Text Available Background: Periodontitis is primarily a dental plaque induced inflammatory disease, local factors that facilitate the accumulation of bacteria may contribute to the progression of the disease. Periodontal disease is not a single entity nor is there a single causative factor that elicits a consistent periodontal response. Dental abnormalities such as palatal grooves and cervical enamel projections (CEPs can act as a predisposing factor to the initiation of localized periodontal destruction. Objectives: 1. To evaluate the presence of developmental grooves and CEP in the anterior and posterior teeth. 2. To study their relationship to periodontal health. Methodology: The study included 1700 subjects of both genders. The presence of palatal grooves and CEPs were detected by visual perception and the suspected area was probed to measure the depth of the groove or enamel extension. The periodontal condition of the area was also examined and the statistical analysis was performed. Results: The prevalence rate of palatal grooves on the central incisor and lateral incisor was 1.8% and 9% respectively while 1.1% had enamel extensions on the molar teeth, all of which were associated with gingivitis or periodontitis. Conclusion: Grooves and projections in the cervical area caused increased plaque accumulation and might be considered a secondary etiological factor in periodontal breakdown and hence should be taken into consideration during periodontal examination and therapy.

  12. Does the maxillary anterior ratio in Korean adults follow the Golden Proportion?

    Science.gov (United States)

    2016-01-01

    PURPOSE The purpose of this study was to determine the effect of changes in the horizontal plane angle on the mesiodistal width ratios of the maxillary anterior teeth during the acquisition of frontal view photographs, derive these ratios for Korean adults on the basis of the data obtained, and analyze them using the Golden Proportion as a reference. MATERIALS AND METHODS In experiment I, 30 plaster casts were mounted on an articulator and positioned on the angle-measuring device with a center setting of 0°. The device was rotated to 10° in 1° increments in a counterclockwise direction. At each angle, photographs were obtained and analyzed. Experiment II was based on 60 patients who visited the Department of Prosthodontics at Kyungpook National University Dental Hospital from February 2012 to February 2015. The patients were divided into three groups [Male (M), Female (F), Total (M + F)]. Frontal views were obtained for all groups and analyzed. RESULTS From 1° to 10°, the relative mesiodistal width ratios for the maxillary anterior teeth showed no significant differences from those at 0°. In all three groups, the relative width ratio of the maxillary central incisor was smaller than that specified in the Golden Proportion; the opposite was true for the canine. CONCLUSION Our results suggest that the mesiodistal width ratios of the maxillary anterior teeth do not follow the Golden Proportion in Korean adults, and that a change in the horizontal plane angle from 1° to 10° during frontal photography does not affect these ratios. PMID:27141256

  13. Surgically facilitated experimental movement of teeth : systematic review

    NARCIS (Netherlands)

    Liem, A. M. L.; Hoogeveen, E. J.; Jansma, J.; Ren, Y.

    2015-01-01

    Several surgical techniques based on corticotomy and dental distraction have been developed to improve the movement of teeth and reduce the duration of orthodontic treatment. In this systematic review we have critically assessed published studies on the experimental movement of teeth to find out whe

  14. Size variation in samples of fossil and recent murid teeth

    NARCIS (Netherlands)

    Freudenthal, M.; Martín Suárez, E.

    1990-01-01

    The variability coefficient proposed by Freudenthal & Cuenca Bescós (1984) for samples of fossil cricetid teeth, is calculated for about 200 samples of fossil and recent murid teeth. The results are discussed, and compared with those obtained for the Cricetidae.

  15. Determination of Radius of Curvature for Teeth With Cycloid Profile

    Science.gov (United States)

    Shatalov, E. V.; Efremenkov, E. A.; Shibinskiy, K. G.

    2016-04-01

    In the article the geometric determination of curvature radius is considered for teeth with cycloid profile. The equations are obtained for the determination of a radius of curvature with point coordinates of a cycloid profile. The conditions of convexo-concavity of a teeth profile are defined for transmission with intermediate rollers.

  16. Improvement in properties of plastic teeth by electron beam irradiation

    International Nuclear Information System (INIS)

    Improvement of the comfort and esthetics of artificial plastic teeth is desirable for the recently increasing numbers of elderly in society. Plastic teeth made of polycarbonate (PC) were modified by electron beam (EB) irradiation under specific conditions, and the change in the chemical properties of the PC was investigated. The water absorption, glucose attachment, level of bis-phenol-A (BPA) extraction, maltose adhesion, and mucin adhesion on the PC teeth were measured before and after EB irradiation. EB irradiation to a dose of 3.5 kGy at 150 oC in a nitrogen gas atmosphere reduced the water absorption by 20%, glucose absorption by 40%, maltose adhesion by 20%, and the amount of various amino acids, formed as the hydrolysis products of mucin, adhering on the PC teeth were reduced by 60-99%. The BPA content was lower than the detection limit for analysis of both the original and the EB irradiated PC teeth. - Highlights: → Radiation improvement of polycarbonate for plastic teeth by EB irradiation 3.5 kGy at 150 oC in inert gas. → Water and glucose absorption and maltose adhesion on PC teeth were much reduced. → Bis-phenol-A content from PC teeth was lower than the detection limit after irradiation.

  17. Retrospective Investigation of the Prevalence of Impacted Teeth in Hatay

    Directory of Open Access Journals (Sweden)

    ibrahim Damlar

    2014-06-01

    Conclusion: In later stages of the people who lives in Hatay's life, due to complications of impacted teeth usually extracted. The impacted teeth were seen without causing any symptoms in a small part of population. [Cukurova Med J 2014; 39(3.000: 559-565

  18. Transposition of teeth: A forensic perspective

    Directory of Open Access Journals (Sweden)

    Supriya Nambiar

    2014-01-01

    Full Text Available Dental identification plays a key role in mass casualties and is usually based on disturbances of tooth eruption, malocclusions and/or previous dental treatments, changes brought about by age, pathological conditions and developmental disturbances. Tooth transposition is a disturbance of tooth eruption and is defined as change in the position of two adjacent teeth within the same quadrant. This review aims to discuss the prevalence and the etiology of transposition through a literature survey and to discuss its importance and implications as pertaining to the field of forensics. In summary, transposition is a rare and severe positional anomaly that represents a challenge for a dentist. It requires a keen eye on the part of the forensic pathologist to identify the condition.

  19. Sorption of zinc on human teeth

    International Nuclear Information System (INIS)

    Zinc containing dental amalgams are sometimes used as fillings by dentists. The freshly mixed mass of the amalgam alloy and liquid mercury packed or condensed into a prepared tooth cavity. Zinc has been included in amalgams alloys up to 2% as an aid in manufacturing by helping to produce clean sound castings of the ingots. Although such restorations have a relatively long service life, they are subject to corrosion and galvanic action, thus releasing metallic products into the oral environment. The aim of this paper is to investigate the uptake (sorption) of Zinc ionic species on human teeth using the radioactive tracer technique. For this purpose the isotope Zn-65 produced from pile-irradiation of zinc metal was used. The various liquids studied were drinking water (tap water), tea, coffee, red tea and chicken soup. Sorption was studied through immersion of a single human tooth (extracted) in each of these liquids

  20. Epicyclic teeth degradation of superficial layers

    International Nuclear Information System (INIS)

    Since the installation of the circulating pumps which equip the 600, 700, 900 and 1300 MW power stations, many gear teeth surfaces and rupture failures have been observed in gear reduction assemblies. Surface controls through fibroscopy were therefore set up and used systematically. Frosting, micropitting, spalling, affect both the nitrided and case-hardened surfaces and can lead to rupture. The extent of micropitting and the corresponding wear have been studied jointly by INSA (LMC) and EDF (GDL) in order to determine surface life. Results show that, in these applications, the ratio between surface roughness and elastrohydrodynamic film thickness is too high and contributes to the initiation of failures. The following palliatives are presently tested on site, namely: - improvement in root tooth profile and gear architecture, - surface treatment optimisation, - surface roughness reduction, - effective lubricant viscosity increase by lowering the operating temperature and increasing the nominal viscosity of the oil

  1. Forensic study of sex determination using PCR on teeth samples.

    Directory of Open Access Journals (Sweden)

    Murakami H

    2000-02-01

    Full Text Available In this study, sex determination using polymerase chain reaction (PCR on tooth material was evaluated from the viewpoint of forensic medicine. The sensitivity of PCR for detection of the Y chromosome-specific alphoid repeat sequence and the X chromosome-specific alphoid repeat sequence was 0.5 pg of genomic DNA. Sex could be determined by PCR of DNA extracted from the pulp of 16 freshly extracted permanent teeth and dentine including the surface of the pulp cavity of 6 freshly extracted milk teeth. Sex could be determined using the pulp in all 20 teeth (10 male and 10 female preserved at room temperature for 22 years. For the pulp of teeth stored in sea water, the sex could be determined in all 8 teeth immersed for 1 week and in 5 of 6 teeth immersed for 4 weeks. In the remaining 1 tooth, in which sex determination based on the pulp failed, the sex could be determined correctly when DNA extracted from the tooth hard tissue was examined. For teeth stored in soil, the sex could be determined accurately in all 8 teeth buried for 1 week, 7 of 8 teeth buried for 4 weeks, and in all 6 teeth buried for 8 weeks. When teeth were heated for 30 min, sex determination from the pulp was possible in all teeth heated to 100, 150, and 200 degrees C, and even in some teeth heated to 250 degrees C. When this method was applied to actual forensic cases, the sex of a mummified body estimated to have been discovered half a year to 1 year after death could be determined readily by examination of the dental pulp. In the skeletons of 2 bodies placed under water for approximately 1 year and approximately 11 years and 7 months, pulp tissues had been dissolved and lost, but sex determination was possible using DNA extracted from hard dental tissues. These results indicate that this method is useful in forensic practices for sex determination based on teeth samples.

  2. Immunohistochemical studies of the periodontal membrane in primary teeth

    DEFF Research Database (Denmark)

    Bille, Marie-Louise Bastholm; Nolting, Dorrit; Kjær, Inger

    2009-01-01

    Objectives. To describe the periodontal membrane of human primary teeth immunohistochemically, while focusing on the epithelial layer of Malassez, fibers, and peripheral nerves, and to compare the findings with those of a previous study of human permanent teeth. Material and methods. Nineteen human...... primary teeth extracted in late childhood in connection with treatment were fixed, decalcified, dehydrated, and embedded in paraffin. Paraffin sections were stained with wide spectrum screening (WSS), Vimentin, and NeuN in order to mark the epithelial layer of Malassez, fibers, and peripheral nerves...... could be identical to those in regions with no resorption. Conclusion. In regions without resorption, spatial organization of the periodontal membrane of primary teeth was similar to that of permanent teeth, although the number and distribution of epithelial cells and fibers differed. In regions with...

  3. Natal and neonatal teeth: A report of three cases

    Directory of Open Access Journals (Sweden)

    Ana Regina Romano

    2015-01-01

    Full Text Available The occurrence of natal and neonatal teeth is relativity rare. General dental practitioners should be aware of these conditions and be prepared to provide appropriate care for patients. The aim of this study is to describe two cases of neonatal teeth and one case of natal teeth, highlighting the importance of the treatment decision. In all of these cases the teeth were part of the normal series of primary dentition. In case 1 the tooth was extracted because of a possibility of aspiration. In cases 2 and 3 the teeth were monitored and parents were instructed about the necessary care, especially the need for good oral hygiene. In conclusion, each patient must be evaluated individually with radiographic and clinical examinations and the best treatment option should always be chosen taking into account parents’ views.

  4. Addition to the methodology of research into permanent teeth hardness

    Directory of Open Access Journals (Sweden)

    Gnjato Sanja

    2010-01-01

    Full Text Available This paper examines permanent teeth hardness (microhardness using the Vickers method. An original methodology was developed and adopted for preparing the experimental material, i.e. the cross sections into four characteristic locations on the tooth: corona dentis, cervix dentis, pars medialis radicis dentis and apex radicis dentis. A new 'hardness profile' was introduced, which connects hardness and location along the cross section of the tooth. Hardness was measured 664 times on experimental cross sections with total a average hardness of 73.17 HV according to Vickers and a standard deviation of 55.68 HV. The derived descriptive statistical indicators of tooth hardness were calculated for equivalent cross sections, individual teeth, teeth groups and tooth localizations. Two algorithms were developed for determining the rank of tooth hardness - one for estimating the rank of arithmetic mean of the hardness of the cross sections of the teeth, and the other for estimating the rank of hardness for individual teeth. .

  5. Strontium in 19th century Australian children's teeth

    International Nuclear Information System (INIS)

    The enamel of teeth from 57 children, who died in the mid to late 1800s, were analysed to investigate strontium (Sr) concentrations in historic teeth. Teeth were analysed using proton induced X-ray emission at the Australian Nuclear Science and Technology Organisation (ANSTO). Where available, multiple teeth were analysed for each individual including permanent (molars and premolars) and deciduous teeth (molars). Preliminary results show that Sr does not appear to be affected by the postmortem environment. Sr levels in permanent molars strongly correlate with levels in the premolars but not with the deciduous molars. Concerns are raised over the large variation seen in Sr levels and the effect it would have on the interpretation of Sr levels in studies with small sample sizes

  6. Comparison of removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether-N, N, N', N'-tetraacetic acid and citric acid in primary teeth: A scanning electron microscopic study

    Directory of Open Access Journals (Sweden)

    Rahul J Hegde

    2016-01-01

    Full Text Available Background: Root canal irrigants are considered momentous in their tissue dissolving property, eliminating microorganisms, and removing smear layer. The present study was aimed to compare the removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether-N, N, N', N'-tetraacetic acid (EGTA and citric acid solutions with saline as a control in primary anterior teeth. Materials and Methods: Thirty primary anterior teeth were chosen for the study. The teeth were distributed into three groups having ten teeth each. Following instrumentation, root canals of the first group were treated with 17% EGTA and the second group with 6% citric acid. Only saline was used as an irrigant for the control group. Then, the teeth were subjected to scanning electron microscopy (SEM study. The scale given by Rome et al. for the smear layer removal was used in the present study. Results: The pictures from the SEM showed that among the tested irrigants, 17% EGTA + 5% sodium hypochlorite (NaOCl group showed the best results when compared to other groups. Conclusion: The results advocate that the sequential irrigation of the pulp canal walls with 17% EGTA followed by 5% NaOCl produced efficacious and smear-free root canal walls.

  7. Comparison of removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid and citric acid in primary teeth: A scanning electron microscopic study

    Science.gov (United States)

    Hegde, Rahul J.; Bapna, Kavita

    2016-01-01

    Background: Root canal irrigants are considered momentous in their tissue dissolving property, eliminating microorganisms, and removing smear layer. The present study was aimed to compare the removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid (EGTA) and citric acid solutions with saline as a control in primary anterior teeth. Materials and Methods: Thirty primary anterior teeth were chosen for the study. The teeth were distributed into three groups having ten teeth each. Following instrumentation, root canals of the first group were treated with 17% EGTA and the second group with 6% citric acid. Only saline was used as an irrigant for the control group. Then, the teeth were subjected to scanning electron microscopy (SEM) study. The scale given by Rome et al. for the smear layer removal was used in the present study. Results: The pictures from the SEM showed that among the tested irrigants, 17% EGTA + 5% sodium hypochlorite (NaOCl) group showed the best results when compared to other groups. Conclusion: The results advocate that the sequential irrigation of the pulp canal walls with 17% EGTA followed by 5% NaOCl produced efficacious and smear-free root canal walls. PMID:27307670

  8. 38 CFR 3.379 - Anterior poliomyelitis.

    Science.gov (United States)

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Anterior poliomyelitis. 3... Specific Diseases § 3.379 Anterior poliomyelitis. If the first manifestations of acute anterior poliomyelitis present themselves in a veteran within 35 days of termination of active military service, it...

  9. Age-Dependent Changes in Pb Concentration in Human Teeth.

    Science.gov (United States)

    Fischer, Agnieszka; Wiechuła, Danuta

    2016-09-01

    The result of exposure to Pb is its accumulation in mineralized tissues. In human body, they constitute a reservoir of approx. 90 % of the Pb reserve. The conducted research aimed at determining the accumulation of Pb in calcified tissues of permanent teeth. The concentration of Pb in 390 samples of teeth taken from a selected group of Polish people was determined using the AAS method. Average concentration of Pb in teeth amounted to 14.3 ± 8.18 μg/g, range of changes: 2.21-54.8 μgPb/g. Accumulation of Pb in human body was determined based on changes in Pb concentration in teeth of subjects aged 13-84 years. It was found that in calcified tissues of teeth, the increase in concentration of Pb that occurs with age is a statistically significant process (p = 0.02, the ANOVA Kruskal-Wallis test). It was determined that the annual increase in concentration of Pb in tissues of teeth is approx. 0.1 μg/g. Moreover, a different course of changes in Pb concentration in tissues of teeth in people born in different years was observed. The level of Pb concentration in teeth of the oldest subjects (>60 years) decreased for those born in the 1930s compared to those in the 1950s. Teeth from younger persons (<60 years) were characterized by an increasing level of Pb concentration. The analysis of changes of Pb indicates that for low exposure, a relatively greater accumulation of Pb concentration in calcified tissues of teeth can occur. PMID:26888348

  10. Pediatric anterior cruciate ligament reconstruction

    OpenAIRE

    McConkey, Mark O.; Bonasia, Davide Edoardo; Amendola, Annunziato

    2011-01-01

    An increasing number of anterior cruciate ligament (ACL) injuries are seen in children now than in the past due to increased sports participation. The natural history of ACL deficient knees in active individuals, particularly in children is poor. Surgical management of ACL deficiency in children is complex due to the potential risk of injury to the physis and growth disturbance. Delaying ACL reconstruction until maturity is possible but risks instability episodes and intra-articular damage. S...

  11. Anterior impingement syndrome in dancers

    OpenAIRE

    O’Kane, John William; Kadel, Nancy

    2007-01-01

    Anterior impingement is a common problem in dancers occurring primarily secondary to the repetitive forced ankle dorsiflexion inherent in ballet. Symptoms generally occur progressively and may respond to conservative treatment including addressing biomechanical faults that contribute to the problem. As impingement progresses, movements essential to ballet may become impossible and arthroscopic ankle surgery is often effective for both diagnosis and treatment, allowing athletes to return to da...

  12. Pharyngeal teeth of the freshwater drum (Aplodinotus grunniens) a predator of the zebra mussel (Dreissena polymorpha)

    Science.gov (United States)

    French, John R. P., III

    1997-01-01

    The morphology of pharyngeal teeth of freshwater drum (Aplodinotus grunniens) was studied to determine changes that occur during growth of drum that may relate to consumption of zebra mussel (Dreissena polymorpha) by larger fish. Pharyngeal teeth were of three types. Cardiform teeth were replaced by villiform teeth, which were replaced by molariform teeth as the size class of drum increased. Molariform teeth comprised over 85% of total surface area of dentition in fish 265 mm long.

  13. Bond Strength of 5(th, 6(th and 7(th Generation Bonding Agents to Intracanal Dentin of Primary Teeth.

    Directory of Open Access Journals (Sweden)

    Hossein Afshar

    2015-04-01

    Full Text Available This in-vitro study sought to assess the push-out bond strength of a total etch and 2 self-etch bonding systems to intracanal dentin of primary anterior teeth (PAT.Thirty-six primary anterior teeth were randomly divided into 3 groups of 5(th generation (Single Bond 2, 6(th generation (Clearfil SE and 7(th generation (Single Bond Universal bonding agents. The canal orifice was restored with composite resin and the push-out test was carried out to assess the bond strength. After applying the push-out load, specimens were evaluated under a light microscope at 40X magnification. One-way ANOVA and log-rank test on Kaplan-Meier curves were applied for the comparison of bond strength among the 3 groups.The mean± standard deviation (SD bond strength was 13.6±5.33 MPa for Single Bond 2, 13.85±5.86 MPa for Clearfil SE and 12.28±5.24 MPa for Single Bond Universal. The differences in bond strength among the 3 groups were not statistically significant (P>0.05.All three bonding agents are recommended for use with composite posts in PAT. However, due to high technical sensitivity of the Total Etch system, single or two-step self etch systems may be preferred for uncooperative children.

  14. A Curriculum Vitae of Teeth: Evolution, Generation, Regeneration

    Directory of Open Access Journals (Sweden)

    Despina S. Koussoulakou, Lukas H. Margaritis, Stauros L. Koussoulakos

    2009-01-01

    Full Text Available The ancestor of recent vertebrate teeth was a tooth-like structure on the outer body surface of jawless fishes. Over the course of 500,000,000 years of evolution, many of those structures migrated into the mouth cavity. In addition, the total number of teeth per dentition generally decreased and teeth morphological complexity increased. Teeth form mainly on the jaws within the mouth cavity through mutual, delicate interactions between dental epithelium and oral ectomesenchyme. These interactions involve spatially restricted expression of several, teeth-related genes and the secretion of various transcription and signaling factors. Congenital disturbances in tooth formation, acquired dental diseases and odontogenic tumors affect millions of people and rank human oral pathology as the second most frequent clinical problem. On the basis of substantial experimental evidence and advances in bioengineering, many scientists strongly believe that a deep knowledge of the evolutionary relationships and the cellular and molecular mechanisms regulating the morphogenesis of a given tooth in its natural position, in vivo, will be useful in the near future to prevent and treat teeth pathologies and malformations and for in vitro and in vivo teeth tissue regeneration.

  15. Estimation of age from development and eruption of teeth

    Directory of Open Access Journals (Sweden)

    B. S. Manjunatha

    2014-01-01

    Full Text Available The developing dentition is used to assess maturity and estimate the age in many disciplines including anthropology, archeology, forensic science, pediatric dentistry and orthodontics. There is evidence that dental development is less effected than skeletal development by malnutrition and hormonal disorders. There are two methods of dental age assessment, radiographically and by clinically visualization of eruption of teeth. The clinical method to assess dental age is based on the emergence of teeth in the mouth. This method is more suitable since it does not require any special equipment, expertise and is more economical. Tooth formation is the best choice for estimating the age as variations are less as compared to other development factors. Eruption of teeth is one of the changes observed easily among the various dynamic changes that occur from the formation of teeth to the final shedding of teeth. The times of eruption of teeth are fairly constant and this can be made use of in ascertaining the average age of eruption of the tooth. Assessment of age of an individual by examination of teeth is one of the accepted methods of age determination.

  16. Energy absorption build-up factors in teeth

    International Nuclear Information System (INIS)

    Geometric progression fitting method has been used to compute energy absorption build-up factor of teeth [enamel outer surface, enamel middle, enamel dentin junction towards enamel, enamel dentin junction towards dentin, dentin middle and dentin inner surface] for wide energy range (0.015-15 MeV) up to the penetration depth of 40 mean free path. The dependence of energy absorption build-up factor on incident photon energy, penetration depth, electron density and effective atomic number has also been studied. The energy absorption build-up factors increases with the penetration depth and electron density of teeth. So that the degree of violation of Lambert-Beer (I = I0e-μt ) law is less for least penetration depth and electron density. The energy absorption build-up factors for different regions of teeth are not same hence the energy absorbed by the different regions of teeth is not uniform which depends on the composition of the medium. The relative dose of gamma in different regions of teeth is also estimated. Dosimetric implication of energy absorption build-up factor in teeth has also been discussed. The estimated absorption build up factors in different regions of teeth may be useful in the electron spin resonance dosimetry. (author)

  17. Periodontal conditions of teeth presenting pathologic migration Condições periodontais de dentes com migração dentária patológica

    Directory of Open Access Journals (Sweden)

    Maurício Ribeiro Costa

    2004-12-01

    Full Text Available The aim of the present study was to evaluate the periodontal conditions of anterior teeth that presented pathologic migration in patients with chronic periodontitis and to compare periodontal destruction in migrated versus non-migrated teeth. The sample included 32 patients of both sexes (mean age: 46.0 ± 11.6 years diagnosed with generalized chronic periodontitis and selected on the basis of the presence of pathologic migration in one or more anterior teeth. This migration was classified according to the following categories: facial flaring, diastema, proximal tilting, rotation or extrusion. The periodontal parameters recorded were clinical attachment loss (CAL and percentage of radiographic bone loss (BL. Mean CAL of 5.50 ± 2.20 mm and mean BL of 41.90 ± 15.40% were found in 115 teeth assessed. The most frequent type of migration was facial flaring (34.80%, followed by diastema (27.00%. Extrusion was hardly observed in the sample (4.30%. However, greater severity of BL and CAL were observed in teeth with this type of migration (59.44% and 8.42 mm, respectively, and in teeth with facial flaring (45.17% of BL and 6.07 mm of CAL. Kruskal-Wallis test indicated that BL presented by teeth with extrusion or facial flaring was greater than that observed in rotated or tilted teeth (p O objetivo deste estudo foi avaliar as condições clínicas periodontais de dentes anteriores com migração patológica (MDP em pacientes com periodontite crônica generalizada e comparar a severidade de destruição periodontal entre dentes migrados e não-migrados. Foram selecionados 32 pacientes, de ambos os sexos, apresentando média de idade de 46,0 anos (± 11,6, com perda clínica de inserção em dentes anteriores e presença de algum tipo de MDP, a saber: vestibularização, diastema, inclinação proximal, giroversão ou extrusão. Os parâmetros avaliados foram a perda clínica de inserção (PIC e o percentual de perda óssea radiográfica (PO. Os

  18. Procedure for the automatic mesh generation of innovative gear teeth

    Directory of Open Access Journals (Sweden)

    Radicella Andrea Chiaramonte

    2016-01-01

    Full Text Available After having described gear wheels with teeth having the two sides constituted by different involutes and their importance in engineering applications, we stress the need for an efficient procedure for the automatic mesh generation of innovative gear teeth. First, we describe the procedure for the subdivision of the tooth profile in the various possible cases, then we show the method for creating the subdivision mesh, defined by two series of curves called meridians and parallels. Finally, we describe how the above procedure for automatic mesh generation is able to solve specific cases that may arise when dealing with teeth having the two sides constituted by different involutes.

  19. POST-MORTEM CHANGES IN TEETH- FORENSIC ISSUES

    Directory of Open Access Journals (Sweden)

    Irina MANOILESCU

    2015-12-01

    Full Text Available Teeth have an increased resistance to environmental factors and decomposition processes, which makes them highly valuable in forensic investigations. The either physical (wind, water, sun, soil type or biological (plant roots, insects, animals environmental factors and the decomposition processes induce post-mortem changes in teeth, which are relevant to forensic investigation in terms of estimating the post-mortem interval or of elucidating the conditions in which the body stood after death. In this paper, based on the data provided in the literature, the authors present the main changes induced by environmental factors and decomposition processes in teeth and refer to their relevance in forensic activity.

  20. Accuracy of Demirjian′s 8 teeth method for age prediction in South Indian children: A comparative study

    Directory of Open Access Journals (Sweden)

    Rezwana Begum Mohammed

    2015-01-01

    Full Text Available Introduction: Demirjian′s method of tooth development is most commonly used to assess age in individuals with emerging teeth. However, its application on numerous populations has resulted in wide variations in age estimates and consequent suggestions for the method′s adaptation to the local sample. Original Demirjian′s method utilized seven mandibular teeth, to which recently third molar is added so that the method can be applied on a wider age group. Furthermore, the revised method developed regression formulas for assessing age. In Indians, as these formulas resulted in underestimation, India-specific regression formulas were developed recently. The purpose of this cross-sectional study was to evaluate the accuracy and applicability of original regression formulas (Chaillet and Demirjian 2004 and India-specific regression formulas (Acharya 2010 using Demirjian′s 8 teeth method in South Indian children of age groups 9-20 years. Methods: The present study consisted of 660 randomly selected subjects (330 males and 330 females were in the aged ranging from 9 to 20 years divided into 11 groups according to their age. Demirjian′s 8 teeth method was used for staging of teeth. Results: Demirjian′s method underestimated the dental age (DA by 1.66 years for boys and 1.55 years for girls and 1.61 years in total. Acharya′s method over estimated DA by 0.21 years for boys and 0.85 years for girls and 0.53 years in total. The absolute accuracy was better for Acharya′s method compared with Demirjian method. Conclusion: This study concluded that both the Demirjian and Indian regression formulas were reliable in assessing age making Demirjian′s 8 teeth method applicable for South Indians.

  1. An ancient dental gene set governs development and continuous regeneration of teeth in sharks.

    Science.gov (United States)

    Rasch, Liam J; Martin, Kyle J; Cooper, Rory L; Metscher, Brian D; Underwood, Charlie J; Fraser, Gareth J

    2016-07-15

    The evolution of oral teeth is considered a major contributor to the overall success of jawed vertebrates. This is especially apparent in cartilaginous fishes including sharks and rays, which develop elaborate arrays of highly specialized teeth, organized in rows and retain the capacity for life-long regeneration. Perpetual regeneration of oral teeth has been either lost or highly reduced in many other lineages including important developmental model species, so cartilaginous fishes are uniquely suited for deep comparative analyses of tooth development and regeneration. Additionally, sharks and rays can offer crucial insights into the characters of the dentition in the ancestor of all jawed vertebrates. Despite this, tooth development and regeneration in chondrichthyans is poorly understood and remains virtually uncharacterized from a developmental genetic standpoint. Using the emerging chondrichthyan model, the catshark (Scyliorhinus spp.), we characterized the expression of genes homologous to those known to be expressed during stages of early dental competence, tooth initiation, morphogenesis, and regeneration in bony vertebrates. We have found that expression patterns of several genes from Hh, Wnt/β-catenin, Bmp and Fgf signalling pathways indicate deep conservation over ~450 million years of tooth development and regeneration. We describe how these genes participate in the initial emergence of the shark dentition and how they are redeployed during regeneration of successive tooth generations. We suggest that at the dawn of the vertebrate lineage, teeth (i) were most likely continuously regenerative structures, and (ii) utilised a core set of genes from members of key developmental signalling pathways that were instrumental in creating a dental legacy redeployed throughout vertebrate evolution. These data lay the foundation for further experimental investigations utilizing the unique regenerative capacity of chondrichthyan models to answer evolutionary

  2. Methodological aspects of EPR dosimetry with teeth

    International Nuclear Information System (INIS)

    EPR dosimetry with tooth enamel is known today as one of the most reliable and accurate methods of retrospective dosimetry. In the present study a comprehensive analysis of influence of the major confounding factors (solar UV exposure and dental X-ray diagnostic procedures) on the accuracy of accidental dose reconstruction is given. In this analysis, the facts known from literature as well as own authors' results were considered. Among the latter it is worth to mention study of doses in enamel caused by X-ray diagnostic procedures as well as investigation of dose profiles in front teeth, which are most affected to solar radiation. As a main result, the variant of dosimetric technique is proposed. It comprises the optimal combination of strongest sides of existing techniques which allows to conduct routine reconstruction of accidental doses as low as few tens of mGy with errors of the same order of magnitude. The proposed technique is primarily destined for dosimetry of Chernobyl liquidators, but could be used for reconstruction of doses of other over-exposed categories. (orig.)

  3. Absence of scalenus anterior muscle.

    OpenAIRE

    Murakami S; Horiuchi K; Yamamoto C; Ohtsuka A; Murakami T.

    2003-01-01

    A rare anomaly of the scalenus muscles is described. In this case, the right scalenus anterior muscle was absent. As a substitute for this muscle, some aberrant muscle slips arose from the lower vertebrae and descended in front of the ventral rami of the lower cervical nerves. These aberrant slips then ran between the ventral rami of the the eighth cervical and first thoracic nerves, and were fused with the right scalenus medius muscle. Thus, the subclavian artery and vein ran in front of the...

  4. Lesiones del ligamento cruzado anterior

    OpenAIRE

    Alejandro Álvarez López; Yenima García Lorenzo

    2015-01-01

    Fundamento: el ligamento cruzado anterior desempeña un papel muy importante en la estabili-dad de la rodilla. La incidencia de esta afección es alta en pacientes que practican deportes de contacto y de no ser tratados de forma adecuada, los resultados son desfavorables. Objetivo: profundizar en los factores necesarios para el tratamiento adecuado de enfermos con esta lesión y evitar las complicaciones. Método: se realizó una revisión bibliográfica de un total de 300 artículos publicados en Pu...

  5. Enhancement of two-photon transition rate by selectively removing certain frequency comb teeth

    CERN Document Server

    Zhang, Shuangyou; Zhao, Jianye

    2015-01-01

    We present experiments demonstrating an enhancement of resonant two-photon transition rate in 87Rb utilizing spectral phase manipulation of the excitation frequency comb. By selectively removing certain comb teeth, the resonant two-photon transition rate can be improved, and reach a factor of more than 1.8. The femtosecond pulse-train excitation of two-photon transition is investigated theoretically based on general multiphoton transitions and the results are compared with the experiments. The theory presented here gives a clear insight of physical mechanism of this quantum coherent control and indicates that it is simple, effective and universal for nonlinear interactions between frequency combs and matters.

  6. Real-Time Rendering of Teeth with No Preprocessing

    DEFF Research Database (Denmark)

    Larsen, Christian Thode; Frisvad, Jeppe Revall; Jensen, Peter Dahl Ejby;

    2012-01-01

    We present a technique for real-time rendering of teeth with no need for computational or artistic preprocessing. Teeth constitute a translucent material consisting of several layers; a highly scattering material (dentine) beneath a semitransparent layer (enamel) with a transparent coating (saliva......). In this study we examine how light interacts with this multilayered structure. In the past, rendering of teeth has mostly been done using image-based texturing or volumetric scans. We work with surface scans and have therefore developed a simple way of estimating layer thicknesses. We use scattering...... properties based on measurements reported in the optics literature, and we compare rendered results qualitatively to images of ceramic teeth created by denturists....

  7. A review on vital pulp therapy in primary teeth.

    Science.gov (United States)

    Parisay, Iman; Ghoddusi, Jamileh; Forghani, Maryam

    2015-01-01

    Maintaining deciduous teeth in function until their natural exfoliation is absolutely necessary. Vital pulp therapy (VPT) is a way of saving deciduous teeth. The most important factors in success of VPT are the early diagnosis of pulp and periradicular status, preservation of the pulp vitality and proper vascularization of the pulp. Development of new biomaterials with suitable biocompatibility and seal has changed the attitudes towards preserving the reversible pulp in cariously exposed teeth. Before exposure and irreversible involvement of the pulp, indirect pulp capping (IPC) is the treatment of choice, but after the spread of inflammation within the pulp chamber and establishment of irreversible pulpitis, removal of inflamed pulp tissue is recommended. In this review, new concepts in preservation of the healthy pulp tissue in deciduous teeth and induction of the reparative dentin formation with new biomaterials instead of devitalization and the consequent destruction of vital tissues are discussed. PMID:25598803

  8. The innervation of the zebrafish pharyngeal jaws and teeth.

    Science.gov (United States)

    Crucke, Jeroen; Van de Kelft, Annelore; Huysseune, Ann

    2015-07-01

    Zebrafish (Danio rerio) teeth are increasingly used as a model to study odontogenesis in non-mammalians. Using serial semi-thin section histology and immunohistochemistry, the nerves innervating the pharyngeal jaws and teeth have been identified. The last pair of branchial arches, which are non-gill bearing but which carry the teeth, are innervated by an internal branch of a post-trematic ramus of the vagal nerve. Another, external, branch is probably responsible for the motor innervation of the branchiomeric musculature. Nerve fibres appear in the pulp cavity of the teeth only late during cytodifferentiation, and are therefore likely not involved in early steps of tooth formation. The precise role of the nervous system during continuous tooth replacement remains to be determined. Nonetheless, this study provides the necessary morphological background information to address this question. PMID:26018453

  9. Computerized 3-D reconstruction of two "double teeth".

    Science.gov (United States)

    Lyroudia, K; Mikrogeorgis, G; Nikopoulos, N; Samakovitis, G; Molyvdas, I; Pitas, I

    1997-10-01

    "Double teeth" is a root malformation in the dentition and the purpose of this study was to reconstruct three-dimensionally the external and internal morphology of two "double teeth". The first set of "double teeth" was formed by the conjunction of a mandibular molar and a premolar, and the second by a conjunction of a maxillary molar and a supernumerary tooth. The process of 3-D reconstruction included serial cross-sectioning, photographs of the sections, digitization of the photographs, extraction of the boundaries of interest for each section, surface representation using triangulation and, finally, surface rendering using photorealistic effects. The resulting three-dimensional representations of the two teeth helped us visualize their external and internal anatomy. The results showed: a) in the first case, fusion of the radical and coronal dentin, as well as fusion of the pulp chambers; and b) in the second case, fusion only of the radical dentin and the pulp chambers. PMID:9550051

  10. Evaluation of local muscle soreness treatment with anterior bite splint made of soft putty impression material

    Directory of Open Access Journals (Sweden)

    Harry Laksono

    2013-03-01

    Full Text Available Background: Local muscle soreness is the most common temporomandibular disorders complaint of patients seeking treatment in the dental clinics. The emergency treatment that can be done in the clinics to manage this disorder is by making anterior bite splint. Anterior bite splint is usually made of acrylic, but currently there is a soft putty impression material that can also be used for making anterior bite splint. The effectiveness of soft putty anterior bite splint in local muscle soreness treatment still has not clear. Purpose: To determine the effectiveness of the soft putty impression material as a material used for making anterior bite splint in the treatment of local muscle soreness. Case: Six patients was reported five female patients aged 20-40 years old and one male patient aged 37 years old with local muscle soreness. Four female patients with a “click” sound on TMJ. Case management: Make differential diagnosis with screening history (anamnesis, clinical examination consists of extra oral examination such as muscle and temporomandibular joint palpation, measure the mandibular movement, end-feel, load test, intra oral examination and radiographic evaluation. Record the results and make the diagnosis. Make a soft putty anterior bite splint, adjusted and inserted in the maxillary anterior teeth. Record the results based on signs and symptoms. Conclusion: It can be concluded that anterior bite splint made of soft putty impression material is effective for treatment the local muscle soreness.Latar belakang: Salah satu tipe temporomandibular disorders yang paling sering dijumpai di klinik dokter gigi adalah local muscle soreness. Perawatan yang dapat dengan segera dilakukan di klinik untuk mengelola gangguan tersebut adalah dengan pembuatan anterior bite splint. Biasanya anterior bite splint terbuat dari akrilik, namun saat ini telah ada bahan cetak soft putty yang memungkinkan untuk dipakai sebagai bahan pembuatan anterior bite splint

  11. Pulp microbiology of complete teeth with idiopathic apical lesions.

    OpenAIRE

    Patricia Rodríguez; Jesús Alberto Calero

    2009-01-01

    Introduction: Periapical changes named as lesions, in teeth with full crown integrity and without history of trauma, do not show a clear aetiology. Objective: To determine the presence of microorganisms in pulp dental tissue will clarify the cause of its death and therefore the damage to periodontal tissues. Materials and methods: From people between 10 and 39 years old, 23 teeth were selected. The samples were taken with paper points and 0.8 sterile files, and were transported in VMGA III me...

  12. The longevity of different restorations in primary teeth

    DEFF Research Database (Denmark)

    Qvist, Vibeke; Poulsen, Agneta; Teglers, Poul Thorpen;

    2010-01-01

    This paper reviews three published papers and adds results from a fourth study which aimed to determine which restorative material would be the best alternative(s) to amalgam (AM) in primary teeth.......This paper reviews three published papers and adds results from a fourth study which aimed to determine which restorative material would be the best alternative(s) to amalgam (AM) in primary teeth....

  13. Histologic properties of the pulp and dentin in primary teeth

    OpenAIRE

    Özçobanoğlu, Gözdem; Durutürk, Leyla

    2013-01-01

    Many teeth, especially the primary teeth are lost prematurely despite advancements in the prevention of dental caries and increasing recognition of the importance of natural dentition. These losses may lead to malocclusion or temporary or permanent esthetic, phonetic and functional problems. Preservation of the integrity and health of oral tissues is the main target in dental pulp treatments. Although the dental pulp is similar to other loose connective tissues of the body, it differs in some...

  14. Clinical and radiological evaluation of impaction of supernumerary teeth

    OpenAIRE

    Tuna, Elif-Bahar; Kurklu, Esma; Gencay, Koray; Ak, Gulsum

    2013-01-01

    Abstract Objective: To describe the clinical and radiological features of children with inverted supernumerary teeth. Study Design: Thirty eight patients with inverted supernumerary teeth (ST) were enrolled in this descriptive and restrospective study. Data from patient records including age, gender, status of dentition, number of ST, number of ST in inverted position, coexistence of ST in inverted and normal direction of eruption, location, orientation, morphology, clinical...

  15. Clinical and radiological evaluation of inverse impaction of supernumerary teeth

    OpenAIRE

    Tuna, Elif B.; Kurklu, Esma; Gencay, Koray; Ak, Gulsum

    2013-01-01

    Objective: To describe the clinical and radiological features of children with inverted supernumerary teeth. Study Design: Thirty eight patients with inverted supernumerary teeth (ST) were enrolled in this descriptive and restrospective study. Data from patient records including age, gender, status of dentition, number of ST, number of ST in inverted position, coexistence of ST in inverted and normal direction of eruption, location, orientation, morphology, clinical complications, management ...

  16. A computer aided design procedure for generating gear teeth

    Science.gov (United States)

    Chang, S. H.; Huston, R. L.; Coy, J. J.

    1984-01-01

    A procedure for computer aided design (CAD) of gear teeth is presented. It is developed for generated teeth fabricated by a hob cutter or a shaper. It provides a means for analytically and numerically determining the tooth profile, given the cutter profile. An illustrative example with involute tooth profiles is given. Application with non-standard profiles and with bevel, spiral bevel, and hypoid gears is discussed.

  17. Mounting ground sections of teeth: Cyanoacrylate adhesive versus Canada balsam

    OpenAIRE

    Manogna R.L. Vangala; Amrutha Rudraraju; Subramanyam, R. V.

    2016-01-01

    Introduction: Hard tissues can be studied by either decalcification or by preparing ground sections. Various mounting media have been tried and used for ground sections of teeth. However, there are very few studies on the use of cyanoacrylate adhesive as a mounting medium. Aims: The aim of our study was to evaluate the efficacy of cyanoacrylate adhesive (Fevikwik™) as a mounting medium for ground sections of teeth and to compare these ground sections with those mounted with Canada balsam. Mat...

  18. A histological study of the innervation of developing mouse teeth.

    OpenAIRE

    Mohamed, S. S.; Atkinson, M E

    1983-01-01

    The innervation of developing mouse teeth between initial formation and crown formation was investigated using silver-stained serial sections. The developing innervation correlated with the stage of development of individual teeth rather than the chronological age of the mice. Nerves approached the developing dental papilla during the bud stage and formed a basal plexus below the dental papilla in the early cap stage. Nerve fibres from this plexus spread into the dental follicle as it began t...

  19. Comparative anatomy of teeth from past to present.

    OpenAIRE

    Alt K; Tuerp J; Brace C; Radlanski R

    1997-01-01

    The comparative anatomy of teeth has a long tradition in research, starting more than two thousand years ago in antiquity. In the 19th century, Richard Owen′s oeuvre Odontography (1840-45) contributed much to establish odontology as an independent scientific discipline. After a short outline of the historical development of the comparative anatomy of teeth, we describe the contents and importance of Owen′s Odontography. Finally, we sketch the contemporary situation of dental mor...

  20. Teeth Grinding: Is Emotional Stability related to Bruxism?

    OpenAIRE

    Sutin, Angelina R.; Terracciano, Antonio; Ferrucci, Luigi; Costa, Paul T.

    2010-01-01

    This study examines the association between personality traits and bruxism, the repetitive grinding or clenching of teeth. Community-dwelling participants (N = 470) had a comprehensive oral examination by a dentist and completed a dental history and personality questionnaires. Consistent with the literature on state anxiety and depression as antecedents of bruxism, Neuroticism-related traits were associated with self-reported teeth grinding. These traits were also associated with other oral c...

  1. What is the Best Root Surface Treatment for Avulsed Teeth?

    OpenAIRE

    Elif B. Tuna; YAMAN, Duygu; Yamamato, Seiko

    2014-01-01

    Dental avulsion is the most severe type of traumatic tooth injuries since it causes damage to several structures and results in avulsion of the tooth from its socket. Management protocols for avulsed teeth should include management of the pulp and periodontal ligament (PDL) cells in order to improve the long-term prognosis and survival of these teeth. The prognosis of the treatment as well as the survival of an avulsed tooth depends on intrinsic and extrinsic factors, such as the duration of ...

  2. Pulp vitality preservation after traumatic dental injuries to permanent teeth

    OpenAIRE

    Blagojević Duška; Petrović Bojan; Marković Dejan; Vujkov Sanja; Demko-Rihter Ivana

    2013-01-01

    Introduction. The pulp vitality preservation after a trauma to permanent teeth is of great importance since dental injuries are common. The aim of our study was to investigate the pulp vitality preservation after tooth injuries. Material and Methods. A retrospective analysis of records of patients with a trauma was performed. The sample consisted of all patients who had been referred to the Department of Dentistry of Vojvodina for a trauma to permanent teeth during the period 2005-2010....

  3. Anterior chest wall examination reviewed

    Directory of Open Access Journals (Sweden)

    F. Trotta

    2011-09-01

    Full Text Available Anterior chest wall involvement is not infrequently observed within inflammatory arthropaties, particularly if one considers seronegative spondiloarthritides and SAPHO syndrome. Physical examination is unreliable and conventional X-rays analysis is an unsatisfactory tool during diagnostic work-up of this region. Scintigraphic techniques yield informations both on the activity and on the anatomical extent of the disease while computerized tomography visualize the elementary lesions, such as erosions, which characterize the process. Moreover, when available, magnetic resonance imaging couple the ability to finely visualize such lesions with the possibility to show early alterations and to characterize the “activity” of the disease, presenting itself as a powerful tool both for diagnosis and follow-up. This review briefly shows the applications of imaging techniques for the evaluation of the anterior chest wall focusing on what has been done in the SAPHO syndrome which can be considered prototypical for this regional involvement since it is the osteo-articular target mainly affected by the disease.

  4. Dolor anterior de la rodilla

    Directory of Open Access Journals (Sweden)

    Alejandro Álvarez López

    2010-01-01

    Full Text Available Introducción:el dolor anterior de la rodilla constituye una importante causa de consulta en la especialidad de Ortopedia y Traumatología. La incidencia de otras enfermedades relacionadas con este síntoma es cada vez mayor, ejemplo de ello es la condromalacia de rótula, tendinitis patelar, osteoartritis patelofemoral entre otras, el diagnóstico de estas enfermedades se debe al cúmulo de experiencia y a la introducción de técnicas y equipos imagenológicos de avanzada. Desarrollo: se realizó una revisión bibliográfica sobre el dolor anterior de la rodilla, con especial énfasis en las teorías involucradas en su fisiopatología, entre las que se encuentran la mala-alineación patelo-femoral, equilibrio de la homeostasis tisular y aumento de la presión intra-ósea, además de brindar brevemente el cuadro clínico de la enfermedad. Para finalizar se expone el enfoque terapéutico que se basa fundamentalmente en el tratamiento conservador, se mencionan además las modalidades de tratamiento quirúrgico.

  5. Antioxidant therapy enhances pulpal healing in bleached teeth

    Science.gov (United States)

    Lima, Adriano Fonseca; Marques, Marcelo Rocha; Soares, Diana Gabriela; Hebling, Josimeri; Marchi, Giselle Maria

    2016-01-01

    Objectives The purpose of this study was to evaluate the histopathological effects of an antioxidant therapy on the pulp tissue of rat teeth exposed to a bleaching gel with 35% hydrogen peroxide. Materials and Methods Forty rats were subjected to oral ingestion by gavage of distilled water (DW) or ascorbic acid (AA) 90 min before the bleaching therapy. For the bleaching treatment, the agent was applied twice for 5 min each to buccal surfaces of the first right mandibular molars. Then, the animals were sacrificed at 6 hr, 24 hr, 3 day, or 7 day post-bleaching, and the teeth were processed for microscopic evaluation of the pulp tissue. Results At 6 hr, the pulp tissue showed moderate inflammatory reactions in all teeth of both groups. In the DW and AA groups, 100% and 80% of teeth exhibited pulp tissue with significant necrosis and intense tissue disorganization, respectively. At 24 hr, the AA-treated group demonstrated a greater regenerative capability than the DW group, with less intense inflammatory reaction and new odontoblast layer formation in 60% of the teeth. For up to the 7 day period, the areas of pulpal necrosis were replaced by viable connective tissue, and the dentin was underlined by differentiated odontoblast-like cells in most teeth of both groups. Conclusions A slight reduction in initial pulpal damage during post-bleaching was promoted by AA therapy. However, the pulp tissue of AA-treated animals featured faster regenerative potential over time. PMID:26877990

  6. Pharyngocutaneous fistula after anterior cervical spine surgery

    OpenAIRE

    Sansur, Charles A.; Early, Stephen; Reibel, James; Arlet, Vincent

    2009-01-01

    Pharyngocutaneous fistulae are rare complications of anterior spine surgery occurring in less than 0.1% of all anterior surgery cases. We report a case of a 19 year old female who sustained a C6 burst fracture with complete quadriplegia. She was treated urgently with a C6 corpectomy with anterior cage and plating followed by posterior cervical stabilization at another institution. Post operatively she developed a pharyngocutaneous fistula that failed to heal despite several attempts of closu...

  7. Evaluation the prevalence of permanent anterior crown fracture and its relevant between 7-14 years students in Tehran, year of 1375

    Directory of Open Access Journals (Sweden)

    Mahmodian J

    1999-01-01

    Full Text Available Anterior tooth crown fracture in children is something that each dentist will confront"nmany times during his professional career."nWe studied the prevalence of anterior teeth crown fractures between 7-14 years old students in"nTehran and some relevant factors like sex, age, the traumatized tooth, amount of overbite and"noverjet, upper lip coverage, jaw that had fractured tooth or teeth and place of fracture in fractured"ncrown."n1338 boys and 1184 girls were in this study. Tooth fracture was almost the same in boys and"n1184 girls with the prevalence of 8%. Fracture was mostly in enamel and average year of"nfracture was 10 years."nIncreased overjet and overbite had direct relation and indirect relation with fracture, also enough"nlip coverage showed less fracture.

  8. Herniation of the anterior lens capsule

    Directory of Open Access Journals (Sweden)

    Pereira Nolette

    2007-01-01

    Full Text Available Herniation of the anterior lens capsule is a rare abnormality in which the capsule bulges forward in the pupillary area. This herniation can be mistaken for an anterior lenticonus where both the capsule and the cortex bulge forward. The exact pathology behind this finding is still unclear. We report the clinical, ultrasound biomicroscopy (UBM and histopathological findings of a case of herniation of the anterior lens capsule. UBM helped to differentiate this entity from anterior lenticonus. Light microscopy revealed capsular splitting suggestive of capsular delamination and collection of fluid (aqueous in the area of herniation giving it a characteristic appearance.

  9. Horace Wellsの"An Essay on Teeth"(1838年刊)について

    OpenAIRE

    市川, 博保

    1994-01-01

    This year will mark the 150 anniversary of Hartford dentist Horace Wells' (1815-48) first use of 'laughing gas' (nitrous oxide) with good results in removing teeth. Horace Wells published "An Essay on Teeth" in 1838. I will review this book. The eight chapters are as follows: 1. Formation and development of Teeth 2. Organization of Teeth 3. Caries of Teeth 4. Cause of Caries 5. Tooth-ache 6. Disease of the Fangs of Teeth 7. Cleansing of Teeth 8. Dental Surgery

  10. Reliability of conventional shade guides in teeth color determination

    Directory of Open Access Journals (Sweden)

    Todorović Ana

    2013-01-01

    Full Text Available Background/Aim. Color matching in prosthodontic therapy is a very important task because it influences the esthetic value of dental restorations. Visual shade matching represents the most frequently applied method in clinical practice. Instrumental measurements provide objective and quantified data in color assessment of natural teeth and restorations. In instrumental shade analysis, the goal is to achieve the smallest ΔE value possible, indicating the most accurate shade match. The aim of this study was to evaluate the reliability of commercially available ceramic shade guides. Methods. VITA Easyshade spectrophotometer (VITA, Germany was used for instrumental color determination. Utilizing this device, color samples of ten VITA Classical and ten VITA 3D - Master shade guides were analyzed. Each color sample from all shade guides was measured three times and the basic parameters of color quality were examined: ΔL, ΔC, ΔH, ΔE, ΔElc. Based on these parameters spectrophotometer marks the shade matching as good, fair or adjust. Results. After performing 1,248 measurements of ceramic color samples, frequency of evaluations adjust, fair and good were statistically significantly different between VITA Classical and VITA 3D Master shade guides (p = 0.002. There were 27.1% cases scored as adjust, 66.3% as fair and 6.7% as good. In VITA 3D - Master shade guides 30.9% cases were evaluated as adjust, 66.4% as fair and 2.7% cases as good. Conclusion. Color samples from different shade guides, produced by the same manufacturer, show variability in basic color parameters, which once again proves the lack of precision and nonuniformity of the conventional method.

  11. Perawatan Gigitan Terbalik Anterior Dengan Menggunakan Inclined Plane

    OpenAIRE

    Siregar, Wilda A.

    2008-01-01

    Gigitan terbalik anterior adalah suatu anomali posisi gigi anterior atas yang lebih ke lingual dibandingkan gigi anterior bawah. Anomali gigitan terbalik anterior dapat ditemui pada periode gigi sulung, gigi bercampur, dan gigi permanen. Faktor etiologi gigitan terbalik anterior dibedakan atas dental, fungsional atau skeletal. Untuk menentukan etiologi dari anomali gigitan terbalik anterior perlu dilakukan diagnosa yang tepat. Perawatan gigitan terbalik anterior ini dapat dilakukan de...

  12. Evaluation of Reasons of Permanent Teeth Extraction in Iranian People (2009)

    OpenAIRE

    Kakoei S.; Fatemian M.; Eskandari Zadeh A.; Parirokh M.; AA Haghdoost

    2012-01-01

    Statement of Problem: Everyday, many people lose their teeth because of various reasons. Knowing the reasons of tooth extraction would help officials to make decisions for helping patients saving their teeth.Purpose: The aim of this study was to investigate the reasons of teeth extraction in dental clinics and some private offices in the city of Kerman in November 2009- February 2010.Materials and Method: In this cross-sectional study, the reasons of teeth extraction in 2076 teeth from 1500 p...

  13. Absence of scalenus anterior muscle.

    Directory of Open Access Journals (Sweden)

    Murakami S

    2003-06-01

    Full Text Available A rare anomaly of the scalenus muscles is described. In this case, the right scalenus anterior muscle was absent. As a substitute for this muscle, some aberrant muscle slips arose from the lower vertebrae and descended in front of the ventral rami of the lower cervical nerves. These aberrant slips then ran between the ventral rami of the the eighth cervical and first thoracic nerves, and were fused with the right scalenus medius muscle. Thus, the subclavian artery and vein ran in front of the aberrant slips, together with the ventral ramus of the first thoracic nerve. The aberrant muscle slips issued 2 accessory bundles. One bundle ran between the ventral rami of the fourth and fifth cervical nerves and was fused with the scalenus medius muscle; the other bundle ran between the ventral rami of the fifth and sixth cervical nerves and was fused with the scalenus medius muscle.

  14. Toxic Anterior Segment Syndrome (TASS

    Directory of Open Access Journals (Sweden)

    Özlem Öner

    2011-12-01

    Full Text Available Toxic anterior segment syndrome (TASS is a sterile intraocular inflammation caused by noninfectious substances, resulting in extensive toxic damage to the intraocular tissues. Possible etiologic factors of TASS include surgical trauma, bacterial endotoxin, intraocular solutions with inappropriate pH and osmolality, preservatives, denatured ophthalmic viscosurgical devices (OVD, inadequate sterilization, cleaning and rinsing of surgical devices, intraocular lenses, polishing and sterilizing compounds which are related to intraocular lenses. The characteristic signs and symptoms such as blurred vision, corneal edema, hypopyon and nonreactive pupil usually occur 24 hours after the cataract surgery. The differential diagnosis of TASS from infectious endophthalmitis is important. The main treatment for TASS formation is prevention. TASS is a cataract surgery complication that is more commonly seen nowadays. In this article, the possible underlying causes as well as treatment and prevention methods of TASS are summarized. (Turk J Oph thal mol 2011; 41: 407-13

  15. Mild toxic anterior segment syndrome mimicking delayed onset toxic anterior segment syndrome after cataract surgery

    Directory of Open Access Journals (Sweden)

    Su-Na Lee

    2014-01-01

    Full Text Available Toxic anterior segment syndrome (TASS is an acute sterile postoperative anterior segment inflammation that may occur after anterior segment surgery. I report herein a case that developed mild TASS in one eye after bilateral uneventful cataract surgery, which was masked during early postoperative period under steroid eye drop and mimicking delayed onset TASS after switching to weaker steroid eye drop.

  16. Influence of Different Rotor Teeth Shapes on the Performance of Flux Switching Permanent Magnet Machines Used for Electric Vehicles

    OpenAIRE

    2014-01-01

    This paper investigated a 12-slot/11-pole flux switching permanent magnet (FSPM) machine used for electric vehicles (EVs). Five novel rotor teeth shapes are proposed and researched to reduce the cogging torque and torque ripple of the FSPM machine. These rotor teeth shapes are notched teeth, stepped teeth, eccentric teeth, combination of notched and stepped teeth, and combination of notched and eccentric teeth. They are applied on the rotor and optimized, respectively. The influences of diffe...

  17. Totally thrombosed giant anterior communicating artery aneurysm

    Directory of Open Access Journals (Sweden)

    V R Roopesh Kumar

    2015-01-01

    Full Text Available Giant anterior communicating artery aneurysmsarerare. Apatient presented with visual dysfunction, gait ataxia and urinary incontinence. MRI showed a giant suprasellar mass.At surgery, the lesion was identified as being an aneurysm arising from the anterior communicating artery.The difficulty in preoperative diagnosis and relevant literature are reviewed.

  18. Anterior capsular rupture following blunt ocular injury

    OpenAIRE

    Gremida, Anas; Kassem, Iris; Traish, Aisha

    2011-01-01

    A 10-year-old boy suffered a large, oblique anterior capsular tear following blunt injury to his right eye. The boy was followed daily for hyphema resolution and progressive traumatic cataract formation. After the hyphema had resolved, the lens was removed using an anterior approach and an intraocular lens was placed with excellent visual outcome.

  19. Anterior cervical hypertrichosis: a sporadic case.

    Science.gov (United States)

    Bostan, Sezen; Yaşar, Şirin; Serdar, Zehra Aşiran; Gizlenti, Sevda

    2016-03-01

    Anterior cervical hypertrichosis is a very rare form of primary localized hypertrichosis. It consists of a tuft of terminal hair on the anterior neck just above the laryngeal prominence. The etiology is still unknown. In this article, we reported a 15-year-old female patient who presented to our clinic with a complaint of hypertrichosis on the anterior aspect of the neck for the last five years. Her past medical history revealed no pathology except for vesicoureteral reflux. On the basis of clinical presentation, our patient was diagnosed with anterior cervical hypertrichosis and she was considered to be a sporadic case due to lack of other similar cases in familial history. To date, 33 patients with anterior cervical hypertrichosis have been reported. Anterior cervical hypertrichosis can be associated with other abnormalities, but it frequently presents as an isolated defect (70%). The association of vesicoureteral reflux and anterior cervical hypertrichosis which was observed in our patient might be coincidental. So far, no case of anterior cervical hypertrichosis associated with vesicoureteral reflux has been reported in the literature. PMID:27103865

  20. A method of improved Bolton index of anterior teeth%改良式Bolton前牙指数分析法

    Institute of Scientific and Technical Information of China (English)

    钱成明; 毛峻武; 蒋桂林

    2009-01-01

    目的:对Bolton前牙指数的不足进行改良.方法:取200名(男女各半)广西壮族恒牙前期正常胎儿童的牙(牙合)模型,测量上下切牙近远中宽度,两者和的比值即为改良Bolton前牙指数.结果:改良Bolton前牙指数男性为76.97,女性为74.07.结论:上下颌切牙量的不调是引起错(牙合)畸形的常见原因,用改良Bolton前牙指数预测覆(牙合)覆盖关系及上下颌牙量不调有一定意义.

  1. Healing of apical rarefaction of three nonvital open apex anterior teeth using a white portland cement apical plug

    Directory of Open Access Journals (Sweden)

    Amitabha Chakraborty

    2012-01-01

    Full Text Available The major challenge of performing root canal treatment in an open apex pulp-less tooth is to obtain a good apical seal. MTA has been successfully used to achieve a good apical seal, wherein the root canal obturation can be done immediately. MTA and White Portland Cement has been shown similarity in their physical, chemical and biological properties and has also shown similar outcome when used in animal studies and human trials. In our study, open apex of three non vital upper central incisors has been plugged using modified white Portland cement. 3 to 6 months follow up revealed absence of clinical symptoms and disappearance of peri-apical rarefactions. The positive clinical outcome may encourage the future use of white Portland cement as an apical plug material in case of non vital open apex tooth as much cheaper substitute of MTA.

  2. Healing of apical rarefaction of three nonvital open apex anterior teeth using a white portland cement apical plug

    OpenAIRE

    Amitabha Chakraborty; Bibhas Dey; Reema Dhar; Prabir Sardar

    2012-01-01

    The major challenge of performing root canal treatment in an open apex pulp-less tooth is to obtain a good apical seal. MTA has been successfully used to achieve a good apical seal, wherein the root canal obturation can be done immediately. MTA and White Portland Cement has been shown similarity in their physical, chemical and biological properties and has also shown similar outcome when used in animal studies and human trials. In our study, open apex of three non vital upper central incisors...

  3. Resin composite restoration in primary anterior teeth using short-post technique and strip crowns: a case report.

    Science.gov (United States)

    Mendes, Fausto Medeiros; De Benedetto, Monique Saveriano; del Conte Zardetto, Cristina Giovannetti; Wanderley, Marcia Turolla; Correa, Maria Salete Nahás Pires

    2004-10-01

    A case report describing a technique for the restoration of endodontically treated primary maxillary incisors with resin composite short posts and celluloid strip crowns in a 3-year-old boy is presented. The technique offers the advantages of using one restorative material, improving esthetics, and reducing chairtime and costs. PMID:15470991

  4. Reconstruction of advanced bone defect associated with severely compromised maxillary anterior teeth in aggressive periodontitis: a case report

    OpenAIRE

    Kamil, Wisam; Al Bayati, Lina; Hussin, Akbar S.; Hassan, Haszelini

    2015-01-01

    Introduction Aggressive periodontitis is characterized by a rapid rate of attachment loss and bone resorption. Regenerative therapy offers reconstruction of the periodontium; however, certain advanced cases with a questionable prognosis might remain a challenge. We report a successful intervention outcome of a challenging case in the aesthetic zone of a patient with aggressive periodontitis. Case presentation A 34-year-old systemically healthy Malay woman was referred to the Periodontics Spec...

  5. Near-IR imaging of cracks in teeth.

    Science.gov (United States)

    Fried, William A; Simon, Jacob C; Lucas, Seth; Chan, Kenneth H; Darling, Cynthia L; Staninec, Michal; Fried, Daniel

    2014-02-18

    Dental enamel is highly transparent at near-IR wavelengths and several studies have shown that these wavelengths are well suited for optical transillumination for the detection and imaging of tooth decay. We hypothesize that these wavelengths are also well suited for imaging cracks in teeth. Extracted teeth with suspected cracks were imaged at several wavelengths in the near-IR from 1300-1700-nm. Extracted teeth were also examined with optical coherence tomography to confirm the existence of suspected cracks. Several teeth of volunteers were also imaged in vivo at 1300-nm to demonstrate clinical potential. In addition we induced cracks in teeth using a carbon dioxide laser and imaged crack formation and propagation in real time using near-IR transillumination. Cracks were clearly visible using near-IR imaging at 1300-nm in both in vitro and in vivo images. Cracks and fractures also interfered with light propagation in the tooth aiding in crack identification and assessment of depth and severity. PMID:24817806

  6. Near-IR imaging of cracks in teeth

    Science.gov (United States)

    Fried, William A.; Simon, Jacob C.; Lucas, Seth; Chan, Kenneth H.; Darling, Cynthia L.; Staninec, Michal; Fried, Daniel

    2014-02-01

    Dental enamel is highly transparent at near-IR wavelengths and several studies have shown that these wavelengths are well suited for optical transillumination for the detection and imaging of tooth decay. We hypothesize that these wavelengths are also well suited for imaging cracks in teeth. Extracted teeth with suspected cracks were imaged at several wavelengths in the near-IR from 1300-1700-nm. Extracted teeth were also examined with optical coherence tomography to confirm the existence of suspected cracks. Several teeth of volunteers were also imaged in vivo at 1300-nm to demonstrate clinical potential. In addition we induced cracks in teeth using a carbon dioxide laser and imaged crack formation and propagation in real time using near-IR transillumination. Cracks were clearly visible using near-IR imaging at 1300-nm in both in vitro and in vivo images. Cracks and fractures also interfered with light propagation in the tooth aiding in crack identification and assessment of depth and severity.

  7. The influence of trace elements on fluoride uptake by teeth

    International Nuclear Information System (INIS)

    To investigate the effect of various trace elements on fluoride uptake by teeth, the concentrations of F and other trace elements have been simultaneously determined in different regions of the teeth from children of South Australia. Teeth cross sectioned along the median plane have been used in these investigations, and their inside enamel, dentine and amelodentinal junctions investigated separately for the trace elemental composition. Fluoride has been determined by observing the 6-7 MeV gammas for the 19F(p,αγ)16O reaction, C by activation through the 12C(3He,n)14O reaction, while other trace elements have been measured by the thick target PIXE technique. Linear correlation coefficients have been calculated between the F concentrations in teeth and those of other trace elements observed. Fluoride is found to correlate best with C, Cu and Pb, poorly with Fe, Sr, Ni and Ag, while with Br and Zn it has-ve coefficients. Student's t-test has been applied to the data to examine the significance of the variation of Fand other trace elements amongst different dental tissues from healthy and diseased teeth. (orig.)

  8. Relationship of deciduous teeth emergence with physical growth

    Directory of Open Access Journals (Sweden)

    Nadia L Soliman

    2012-01-01

    Full Text Available Introduction: Tooth eruption, recognized as an aspect of human growth and development, could possibly be influenced by a number of factors. It may reflect the general body development. Aim: The aim of the present research is to investigate the relationship of deciduous teeth emergence with physical growth (weight/height indices. Materials and Methods: A study was conducted among a sample of 1132 Egyptian infants whose ages range from 4 to 36 months. The sample was collected from some randomly selected health centers affiliated to the ministry of health where various socioeconomic strata from different geographic localities were recruited. The children visit there regularly for vaccination at definite ages. Weight and height were evaluated as factors that might have influence on the time of deciduous teeth emergence. Results: The results showed a certain degree of correlation between the number of deciduous teeth emerged and the studied anthropometric measurements which differed by sex and age. Conclusion: All anthropometric parameters showed relationship with the number of teeth at different levels. Although weight showed influence on the number of teeth emerged, it was less significant than height.

  9. Shoulder Magnetic Resonance Arthrography: A Prospective Randomized Study of Anterior and Posterior Ultrasonography-Guided Contrast Injections

    Energy Technology Data Exchange (ETDEWEB)

    Koivikko, M.P.; Mustonen, A.O.T. (Dept. of Radiology, Helsinki Univ. Central Hospital, Helsinki (Finland))

    2008-10-15

    Background: Magnetic resonance (MR) arthrography is an accurate imaging method for internal shoulder derangements and rotator cuff pathologies. Both anterior and posterior contrast injection techniques, under palpatory, fluoroscopic, or ultrasonographic guidance have been described in the literature. However, clinical comparisons of the injection techniques remain few. Purpose: To compare the performance of anterior and posterior ultrasonography (US)-guided arthrography injections of the shoulder regarding patient discomfort and influence on diagnostic MR reading, and to illustrate the typical artifacts resulting from contrast leakage in the respective techniques. Material and Methods: 43 MR arthrographies were prospectively randomized into anterior and posterior US-guided contrast injections and performed by two radiologists, with the study of artifacts from contrast leakage. Pain from the injections was assessed by a survey utilizing a 100-mm visual analogue scale (VAS). Results: Of the 23 anterior injections, nine caused contrast artifacts in the subscapular tendon, and in three the leakage extended further anteriorly. Of the 20 posterior injections, 12 showed injection artifacts of the rotator cuff, extending outside the cuff in seven. Two of the anterior and none of the posterior artifacts compromised diagnostic quality. In posterior injections, the leakage regularly occurred at the caudal edge of the infraspinatus muscle and was easily distinguishable from rotator cuff tears. All patients completed the pain survey. Mean VAS scores were 25.0 (median 18, SD 22) for anterior, and 25.4 (median 16, SD 25) for posterior injections. The two radiologists achieved different mean VAS scores but closely agreed as to anterior and posterior VAS scores. Conclusion: Arthrography injections were fairly simple to perform under US guidance. Patient discomfort for anterior and posterior injections was equally minor. A tailored approach utilizing anterior or posterior injections

  10. Shoulder Magnetic Resonance Arthrography: A Prospective Randomized Study of Anterior and Posterior Ultrasonography-Guided Contrast Injections

    International Nuclear Information System (INIS)

    Background: Magnetic resonance (MR) arthrography is an accurate imaging method for internal shoulder derangements and rotator cuff pathologies. Both anterior and posterior contrast injection techniques, under palpatory, fluoroscopic, or ultrasonographic guidance have been described in the literature. However, clinical comparisons of the injection techniques remain few. Purpose: To compare the performance of anterior and posterior ultrasonography (US)-guided arthrography injections of the shoulder regarding patient discomfort and influence on diagnostic MR reading, and to illustrate the typical artifacts resulting from contrast leakage in the respective techniques. Material and Methods: 43 MR arthrographies were prospectively randomized into anterior and posterior US-guided contrast injections and performed by two radiologists, with the study of artifacts from contrast leakage. Pain from the injections was assessed by a survey utilizing a 100-mm visual analogue scale (VAS). Results: Of the 23 anterior injections, nine caused contrast artifacts in the subscapular tendon, and in three the leakage extended further anteriorly. Of the 20 posterior injections, 12 showed injection artifacts of the rotator cuff, extending outside the cuff in seven. Two of the anterior and none of the posterior artifacts compromised diagnostic quality. In posterior injections, the leakage regularly occurred at the caudal edge of the infraspinatus muscle and was easily distinguishable from rotator cuff tears. All patients completed the pain survey. Mean VAS scores were 25.0 (median 18, SD 22) for anterior, and 25.4 (median 16, SD 25) for posterior injections. The two radiologists achieved different mean VAS scores but closely agreed as to anterior and posterior VAS scores. Conclusion: Arthrography injections were fairly simple to perform under US guidance. Patient discomfort for anterior and posterior injections was equally minor. A tailored approach utilizing anterior or posterior injections

  11. Anterior Shoulder Instability with Concomitant Superior Labrum from Anterior to Posterior (SLAP) Lesion Compared to Anterior Instability without SLAP Lesion

    Science.gov (United States)

    Durban, Claire Marie C.; Kim, Je Kyun; Kim, Sae Hoon

    2016-01-01

    Background The aims of this study were to investigate the clinical characteristics of patients with combined anterior instability and superior labrum from anterior to posterior (SLAP) lesions, and to analyze the effect of concomitant SLAP repair on surgical outcomes. Methods We retrospectively reviewed patients who underwent arthroscopic stabilization for anterior shoulder instability between January 2004 and March 2013. A total of 120 patients were available for at least 1-year follow-up. Forty-four patients with reparable concomitant detached SLAP lesions (group I) underwent combined SLAP and anterior stabilization, and 76 patients without SLAP lesions (group II) underwent anterior stabilization alone. Patient characteristics, preoperative and postoperative pain scores, Rowe scores, and shoulder ranges of motion were compared between the 2 groups. Results Patients in group I had higher incidences of high-energy trauma (p = 0.03), worse preoperative pain visual analogue scale (VAS) (p = 0.02), and Rowe scores (p = 0.04). The postoperative pain VAS and Rowe scores improved equally in both groups without significant differences. Limitation in postoperative range of motion was similar between the groups (all p-value > 0.05). Conclusions Anterior instability with SLAP lesion may not be related to frequent episodes of dislocation but rather to a high-energy trauma. SLAP fixation with anterior stabilization procedures did not lead to poor functional outcomes if appropriate surgical techniques were followed. PMID:27247742

  12. The anterior interhemispheric approach to a third ventricular cavernous malformation.

    Science.gov (United States)

    Martirosyan, Nikolay L; Kalani, M Yashar S; Nakaji, Peter; Spetzler, Robert F

    2016-01-01

    The anterior interhemispheric approach is a workhorse for treatment of lesions in the third ventricle. In this case, we demonstrate the utility of this approach for resecting a complex third ventricular cavernous malformation. We discuss patient positioning, optimal location of the craniotomy, and surgical resection techniques for safe removal of these lesions. We also demonstrate the importance of gravity retraction using the falx to prevent injury to the dominant frontal lobe. The video can be found here: https://youtu.be/38woc28er7M . PMID:26722693

  13. Sealants for preventing dental decay in the permanent teeth

    DEFF Research Database (Denmark)

    Ahovuo-Saloranta, Anneli; Forss, Helena; Walsh, Tanya;

    2013-01-01

    preventing caries in children and adolescents when compared to no sealants. Their effectiveness may be related to the caries prevalence in the population. OBJECTIVES: To compare the effects of different types of fissure sealants in preventing caries in permanent teeth in children and adolescents. SEARCH...... 2012). SELECTION CRITERIA: Randomised or quasi-randomised controlled trials of at least 12 months duration comparing sealants for preventing caries of occlusal or approximal surfaces of premolar or molar teeth with no sealant or different type of sealant in children and adolescents under 20 years of...... age. DATA COLLECTION AND ANALYSIS: Two review authors independently screened search results, extracted data and assessed trial quality. We calculated the odds ratio (OR) for caries or no caries on occlusal surfaces of permanent molar teeth. For trials with a split-mouth design, the Becker...

  14. Mapping the structure, composition and mechanical properties of human teeth

    Energy Technology Data Exchange (ETDEWEB)

    Low, I.M. [Materials Research Group, Department of Applied Physics, Curtin University of Technology, Perth, WA 6845 (Australia)], E-mail: j.low@curtin.edu.au; Duraman, N.; Mahmood, U. [Materials Research Group, Department of Applied Physics, Curtin University of Technology, Perth, WA 6845 (Australia)

    2008-03-10

    The structure-property relationship in human adult and baby teeth was characterised by grazing-incidence synchrotron radiation diffraction, optical and atomic-force microscopy, in addition to Vickers indentation. Similarities and differences between both types of teeth have been highlighted and discussed. Depth-profiling results indicated the existence of contrasting but distinct gradual changes in crystal disorder, phase abundance, crystallite size and hardness within the baby and adult enamel, thus confirming the graded nature of human teeth. When compared to the adult tooth, the baby enamel is softer, more prone to fracture, but has larger hydroxyapatite grains. Vickers hardness of the enamel was load-dependent but load-independent in the dentine. The use of a 'bonded-interface' technique revealed the nature and evolution of deformation-microfracture damage around and beneath Vickers contacts.

  15. Rotary endodontics in primary teeth – A review

    Directory of Open Access Journals (Sweden)

    Sageena George

    2016-01-01

    Full Text Available Endodontic treatment in primary teeth can be challenging and time consuming, especially during canal preparation, which is considered one of the most important steps in root canal therapy. The conventional instrumentation technique for primary teeth remains the “gold-standard” over hand instrumentation, which makes procedures much more time consuming and adversely affects both clinicians and patients. Recently nickel–titanium (Ni–Ti rotary files have been developed for use in pediatric endodontics. Using rotary instruments for primary tooth pulpectomies is cost effective and results in fills that are consistently uniform and predictable. This article reviews the use of nickel–titanium rotary files as root canal instrumentation in primary teeth. The pulpectomy technique is described here according to different authors and the advantages and disadvantages of using rotary files are discussed.

  16. Case report of the radiation damage to the developing teeth

    International Nuclear Information System (INIS)

    In the treatment of malignant diseases about the head and neck, radium, x-rays and other radioactive materials are used as therapeutic agents. When irradiation is heavy, deleterious effects may be seen later in jaws, the teeh, or in both teeth and jaws. Young patients with undeveloped and developing teeth, despite lower dosages, are more subject to radiation damage to the teeth. After heavy exposure, grossly stunted teeth may appear. The crown is sometimes smoller than normal and deformed, and the root may be grossly underdeveloped. Sometimes the crown is formed normally but the roots are absent. This case is presented in which the mandibular jaw was irradiated at 3 years old and it was possible to examine some of the abnormal teeth in detail by using clinical, radiographic, and histologic technicques. The patient was first seen on June 21, 1982, at the age of 6 years old and one month. His medical history revealed that when he was 3 years old a malignant fibrous histiocytoma of the left mandibula. Radiation therapy (Linac) began at 3 years old and three months and extended over a period of one month. The total dose was 4750 rads. The crown of other teeth were formed normally but when the patient was 7 years old, the upper left lateral incisor was appeared to have short clinical crown. Radiographs revealed that roots of lower incisors were short and roots of molars were absent. The extracted lower molar was cut undecalcified to produce planoparallel section. The section showed that the dysplastic dentin was formed and it was continuous with the alveolar bone at the base of the tooth. (author)

  17. Morphometric Analysis of Bone Resection in Anterior Petrosectomies.

    Science.gov (United States)

    Ahmed, Osama; Walther, Jonathan; Theriot, Krystle; Manuel, Morganne; Guthikonda, Bharat

    2016-06-01

    Introduction The anterior petrosectomy is a well-defined skull base approach to lesions such as petroclival meningiomas, posterior circulation aneurysms, petrous apex lesions (chondrosarcomas, cholesteatomas), ventrolateral brainstem lesions, clival chordomas, trigeminal neurinomas, and access to cranial nerves III, IV, V, and VII. Methods and Materials Fourteen anterior petrosectomies on eight cadaveric heads were performed in a skull base dissection laboratory. Predissection and postdissection thin-cut computed tomography scans were obtained to compare the bone resection. A computer program was used (InVivo5, Anatomage, San Jose, California, United States) to measure the bone resection and the improved viewing angle. Results The average bone removed in each plane was as follows: anterior to posterior plane was 10.57 mm ± 2.00 mm, superior to inferior was 9.39 mm ± 1.67 mm, and lateral to medial was 17.46 mm ± 4.64 mm. The average increased angle of view was 13.01 ± 2.35 degrees (Table 1). The average volume was 1786.94 ± 827.40 mm(3). Conclusions Anterior petrosectomy is a useful approach to access the ventrolateral brainstem region. We present a cadaveric study quantitating the volume of bone resection and improvement in the viewing angle. These data provide useful preoperative information on the utility of this skull base approach and the gain in the viewing angle after bony removal. PMID:27175319

  18. Prosthodontic considerations concerning the abutment teeth of the irradiated patient

    Energy Technology Data Exchange (ETDEWEB)

    Nitta, Eiji; Taniguchi, Hisashi; Ohyama, Takashi; Takeda, Masamune (Tokyo Medical and Dental Univ. (Japan). School of Dentistry)

    1984-06-01

    There still remain several prosthodontic problems for the patient who has received radiation therapy for oral cancer because of radiation injury. We have experienced these in applying a tooth-borne denture to such a patient. Subsequently, it has been recognized that the longevity of the abutment teeth in such a denture is extremely short, compared with the ordinary case. Therefore, when designing the prosthesis for the irradiated patients, it is imperative that we pay special attention to the decreased vitality of the supporting bones of the abutment teeth, as well as to the weakened mucous membrane and rampant caries.

  19. Remaining teeth, cardiovascular morbidity and death among adult Danes

    DEFF Research Database (Denmark)

    Heitmann, B L; Gamborg, M

    2008-01-01

    OBJECTIVE: To examine if number of remaining teeth was associated with development of cardiovascular morbidity and mortality over 5-12 years. METHODS: Prospective observational study among 1474 men and 1458 women born 1922, 1932, 1942 or 1952 from The Danish MONICA follow up study (MONItoring......, incidence of cardiovascular disease and coronary heart disease, during averagely 7.5 years of follow-up. Compared to those with most teeth remaining, the edentulous suffered >3-fold increased Hazard (HR) of developing stroke (HR=3.25; 95% CI: 1.48-7.14), whereas the risk of developing any cardiovascular...

  20. Spontaneous correction of pathologically migrated teeth with periodontal therapy alone

    Directory of Open Access Journals (Sweden)

    Himanshu Dadlani

    2013-01-01

    Full Text Available Pathological tooth migration is a characteristic sign of an advanced form of chronic periodontitis. The etiology of pathological tooth migration is complex and multifactorial. Usually treatment of pathological migration includes a multidisciplinary approach. However, in some cases, spontaneous repositioning of the pathologically migrated teeth has been reported following periodontal therapy alone. In the present report, following periodontal surgery, there was a spontaneous repositioning of the migrated teeth and restoration of dento-facial esthetics. The treatment options in cases of pathological tooth migration, based on the severity, are also discussed.

  1. OVERVIEW OF IN-OFFICE BLEACHING OF VITAL TEETH

    Directory of Open Access Journals (Sweden)

    Hegde Mithra N.

    2012-11-01

    Full Text Available The importance of tooth whitening for patients has shown a dramatic increase in the number of products and procedures over recent years. Vital tooth bleaching refers to chair-side clinical application of a chemical solution to a tooth surface in order to achieve whitening effect of the teeth. Vital bleaching have found to be very effective but they also have their the drawbacks. The current article gives knowledge of vital tooth whitening with respect to external bleaching methods. the external bleaching of vital teeth focuses on patient selection, mechanisms, bleaching procedure and various in-office bleaching systems and techniques and their disadvantages.

  2. Computation of exposure build-up factors in teeth

    International Nuclear Information System (INIS)

    The G-P fitting method has been used to compute the exposure build-up factor of teeth [enamel outer surface (EOS), enamel middle (EM), enamel dentin junction towards enamel (EDJE), enamel dentin junction towards dentin (EDJD), dentin middle (DM) and dentin inner surface (DIS)] for a wide energy range (0.015-15 MeV) up to the penetration depth of 40 mean free paths. The dependence of exposure build-up factor on incident photon energy, penetration depth, electron density and effective atomic number has also been studied. The computed exposure build-up factor is useful to estimate the relative dose distribution in different regions of teeth.

  3. Finnegan’s teeth: artists book and public art project

    OpenAIRE

    Cowan, Judith

    2009-01-01

    Finnegan’s Teeth is a visual journey seen through the eyes of the animal Finnegan. Taking place around King’s Cross in London, it follows the area as it goes through construction and deconstruction. Photographs of the happenings and events that Finnegan notices on his travels accompany the voices of the street life around him. • Finnegan’s Teeth, the book, developed into a major public Art project on the edge of the Kings Cross regeneration site. The happenings and events of Finnegan’s exp...

  4. Computation of exposure build-up factors in teeth

    Energy Technology Data Exchange (ETDEWEB)

    Manjunatha, H.C., E-mail: manjunathhc@rediffmail.co [Department of Physics, Bangalore University, Bangalore 560056, Karnataka (India); Rudraswamy, B. [Department of Physics, Bangalore University, Bangalore 560056, Karnataka (India)

    2011-01-15

    The G-P fitting method has been used to compute the exposure build-up factor of teeth [enamel outer surface (EOS), enamel middle (EM), enamel dentin junction towards enamel (EDJE), enamel dentin junction towards dentin (EDJD), dentin middle (DM) and dentin inner surface (DIS)] for a wide energy range (0.015-15 MeV) up to the penetration depth of 40 mean free paths. The dependence of exposure build-up factor on incident photon energy, penetration depth, electron density and effective atomic number has also been studied. The computed exposure build-up factor is useful to estimate the relative dose distribution in different regions of teeth.

  5. Multiple unerupted mandibular permanent molar teeth: a case report

    Directory of Open Access Journals (Sweden)

    Kaan Gündüz

    2012-04-01

    Full Text Available

    The multiple impacted teeth at jaws are a rare condition that frequently associated with syndromes, metabolic disorders or trauma. A 48-year old male patient was referred to our clinic, with complaint of pain on right retromolar region while chewing. The patient had facial asymmetry and restricted mouth opening. Clinical and radiographic examination revealed the impaction of mandibular first, second and third molar and an abnormal condyle and coronoid process. All of the impacted teeth were extracted. Because the patient refused other treatment procedures no surgical intervention was performed for the asymmetry and restricted mouth opening. Six months clinic and radiographic follow up were satisfactory.

  6. PIXE analysis of trace elements in northern fur seal teeth

    International Nuclear Information System (INIS)

    Trace elements in teeth of northern fur seal Collorhinus ursinus were analyzed by PIXE and micro-PIXE (μ-PIXE). Trace elements such as Mn, Fe, Zn, Cu, As, Br, Sr, and Pb were detected in the teeth, which were composed of hydroxyapatite crystals. Among these elements, the concentrations of Fe and Zn were relatively higher in winter and lower in summer and also Zn varied along with growth of individuals. These elemental fluctuation seems to correspond to the life history of the northern fur seal. It suggests that the PIXE analysis will make a powerful tool to reconstruct the life history

  7. Prosthodontic considerations concerning the abutment teeth of the irradiated patient

    International Nuclear Information System (INIS)

    There still remain several prosthodontic problems for the patient who has received radiation therapy for oral cancer because of radiation injury. We have experienced these in applying a tooth-borne denture to such a patient. Subsequently, it has been recognized that the longevity of the abutment teeth in such a denture is extremely short, compared with the ordinary case. Therefore, when designing the prosthesis for the irradiated patients, it is imperative that we pay special attention to the decreased vitality of the supporting bones of the abutment teeth, as well as to the weakened mucous membrane and rampant caries. (author)

  8. Lead levels in deciduous teeth of children from selected urban areas in the Cape Peninsula

    International Nuclear Information System (INIS)

    The lead levels in shed deciduous teeth of children from two selected urban regions in the Cape Peninsula were compared. The average levels in the teeth of children living in the vicinity of two large industrial plants were: whole teeth 20,419 ppm, enamel 10,952 ppm, and dentine 22,733 ppm. The lead levels in teeth from children living in the vicinity of light industries were: whole teeth 16,556 ppm, enamel 2,919 ppm, and dentine 19,926 ppm. These differences were significant at the 1% level (teeth and enamel) and 5% level (dentine)

  9. Scanning electron microscopy and electron probe X-ray microanalysis (SEM-EPMA) of pink teeth

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, N.; Watanabe, G.; Harada, A.; Suzuki, T.

    1988-11-01

    Samples of postmortem pink teeth were investigated by scanning electron microscopy and electron probe X-ray microanalysis. Fracture surfaces of the dentin in pink teeth were noticeably rough and revealed many more smaller dentinal tubules than those of the control white teeth. Electron probe X-ray microanalysis showed that the pink teeth contained iron which seemed to be derived from blood hemoglobin. The present study confirms that under the same circumstance red coloration of teeth may occur more easily in the teeth in which the dentin is less compact and contains more dentinal tubules.

  10. Scanning electron microscopy and electron probe X-ray microanalysis (SEM-EPMA) of pink teeth

    International Nuclear Information System (INIS)

    Samples of postmortem pink teeth were investigated by scanning electron microscopy and electron probe X-ray microanalysis. Fracture surfaces of the dentin in pink teeth were noticeably rough and revealed many more smaller dentinal tubules than those of the control white teeth. Electron probe X-ray microanalysis showed that the pink teeth contained iron which seemed to be derived from blood hemoglobin. The present study confirms that under the same circumstance red coloration of teeth may occur more easily in the teeth in which the dentin is less compact and contains more dentinal tubules

  11. Anterior retropharyngeal approach to the cervical spine.

    OpenAIRE

    Behari S; Banerji D; Trivedi P; Jain V; Chhabra D

    2001-01-01

    The anterior retropharyngeal approach (ARPA) accesses anteriorly situated lesions from the clivus to C3, in patients with a short neck, Klippel Feil anomaly or those in whom the C2-3 and C3-4 disc spaces are situated higher in relation to the hyoid bone and the angle of mandible where it is difficult to approach this region using the conventional anterior approach, due to the superomedial obliquity of the trajectory. The ARPA avoids the potentially contaminated oropharyngeal cavity providing ...

  12. Mini-open anterior lumbar interbody fusion.

    Science.gov (United States)

    Gandhoke, Gurpreet S; Ricks, Christian; Tempel, Zachary; Zuckerbraun, Brian; Hamilton, D Kojo; Okonkwo, David O; Kanter, Adam S

    2016-07-01

    In deformity surgery, anterior lumbar interbody fusion provides excellent biomechanical support, creates a broad surface area for arthrodesis, and induces lordosis in the lower lumbar spine. Preoperative MRI, plain radiographs, and, when available, CT scan should be carefully assessed for sacral slope as it relates to pubic symphysis, position of the great vessels (especially at L4/5), disc space height, or contraindication to an anterior approach. This video demonstrates the steps in an anterior surgical procedure with minimal open exposure. The video can be found here: https://youtu.be/r3bC4_vu1hQ . PMID:27364424

  13. Accuracy of age estimation of radiographic methods using developing teeth.

    Science.gov (United States)

    Maber, M; Liversidge, H M; Hector, M P

    2006-05-15

    Developing teeth are used to assess maturity and estimate age in a number of disciplines, however the accuracy of different methods has not been systematically investigated. The aim of this study was to determine the accuracy of several methods. Tooth formation was assessed from radiographs of healthy children attending a dental teaching hospital. The sample was 946 children (491 boys, 455 girls, aged 3-16.99 years) with similar number of children from Bangladeshi and British Caucasian ethnic origin. Panoramic radiographs were examined and seven mandibular teeth staged according to Demirjian's dental maturity scale [A. Demirjian, Dental development, CD-ROM, Silver Platter Education, University of Montreal, Montreal, 1993-1994; A. Demirjian, H. Goldstein, J.M. Tanner, A new system of dental age assessment, Hum. Biol. 45 (1973) 211-227; A. Demirjian, H. Goldstein, New systems for dental maturity based on seven and four teeth, Ann. Hum. Biol. 3 (1976) 411-421], Nolla [C.M. Nolla, The development of the permanent teeth, J. Dent. Child. 27 (1960) 254-266] and Haavikko [K. Haavikko, The formation and the alveolar and clinical eruption of the permanent teeth. An orthopantomographic study. Proc. Finn. Dent. Soc. 66 (1970) 103-170]. Dental age was calculated for each method, including an adaptation of Demirjian's method with updated scoring [G. Willems, A. Van Olmen, B. Spiessens, C. Carels, Dental age estimation in Belgian children: Demirjian's technique revisited, J. Forensic Sci. 46 (2001) 893-895]. The mean difference (+/-S.D. in years) between dental and real age was calculated for each method and in the case of Haavikko, each tooth type; and tested using t-test. Mean difference was also calculated for the age group 3-13.99 years for Haavikko (mean and individual teeth). Results show that the most accurate method was by Willems [G. Willems, A. Van Olmen, B. Spiessens, C. Carels, Dental age estimation in Belgian children: Demirjian's technique revisited, J. Forensic Sci

  14. Applicability of Community Periodontal Index Teeth and Random Half-mouth Examination to Gingival Bleeding Assessment in Untreated Adult Population in Beijing

    Institute of Scientific and Technical Information of China (English)

    Jing-hua Zhang

    2012-01-01

    To assess whether Community Periodontal Index (CPI) teeth and random half-mouth methods are representative of full-mouth method in gingival bleeding examination.Methods Data from 1000 untreated adults (age > 18) collected in Beijing from January 2000 to January 2001 were utilized in the analysis.Half of the subjects were examined by Gingival Bleeding Index (GBI) and the other half by Sulcus Bleeding Index (SBI).The data were sorted out and calculated according to CPI teeth and random half-mouth teeth methods.The results of the 2 methods were separately compared with those of full-mouth examination.Results There was a significant difference between CPI teeth method and full-mouth examination (P<0.05) in both GBI and SBI.In contrast,compared with full-mouth examination,significant difference was not observed in diagonal or ipsilateral half-mouth results in SBI (P>0.05),nor in diagonal half-mouth results in GBI (P>0.05)Conclusions The results of CPI teeth method on gingival bleeding could not reflect the full-mouth situation.Ipsilateral and diagonal half-mouth results can serve as a substitute for full-mouth results in SBI,while diagonal half-mouth results in GBI.

  15. Anterior-posterior and medial compression of the supraglottis : Signs of nonorganic dysphonia or normal postures?

    NARCIS (Netherlands)

    Behrman, A; Dahl, LD; Abramson, AL; Schutte, HK

    2003-01-01

    Two vocal tract postures commonly identified as hallmarks of nonorganic dysphonia are anterior-posterior and medial compression of the supraglottis. However, insufficient data exist to support their diagnostic utility. The purpose of this study was to compare these two postures in patients with nono

  16. An electromyographic study to assess the minimal time duration for using the splint to raise the vertical dimension in patients with generalized attrition of teeth

    Directory of Open Access Journals (Sweden)

    Aditi Nanda

    2011-01-01

    Full Text Available Background: To investigate the effect of restoration of lost vertical by centric stabilizing splint on electromyographic (EMG activity of masseter and anterior temporalis muscles bilaterally in patients with generalized attrition of teeth. Materials and Methods: EMG activity of anterior temporalis and masseter muscle was recorded bilaterally for 10 patients whose vertical was restored with centric stabilizing splint. The recording was done at postural rest position and in maximum voluntary clenching for each subject before the start of treatment, immediately after placement of splint and at subsequent recall visits, with splint and without the splint. Results: The EMG activity at postural rest position (PRP and maximum voluntary clench (MVC decreased till 1 month for both the muscles. In the third month, an increase in muscle activity toward normalization was noted at PRP, both with and without splint. At MVC in the third month, the muscle activity without splint decreased significantly as compared to pretreatment values for anterior temporalis and masseter, while with the splint an increase was seen beyond the pretreatment values. Conclusion: A definite response of anterior temporalis and masseter muscle was observed over a period of 3 months. This is suggestive that the reversible increase in vertical prior to irreversible intervention must be carried out for a minimum of 3 months to achieve neuromuscular deprogramming. This allows the muscle to get adapted to the new postural position and attain stability in occlusion following splint therapy.

  17. Effect of Object Position in Cone Beam Computed Tomography Field of View for Detection of Root Fractures in Teeth with Intra-Canal Posts

    Science.gov (United States)

    Valizadeh, Solmaz; Vasegh, Zahra; Rezapanah, Samin; Safi, Yaser; Khaeazifard, Mohamad Javad

    2015-01-01

    Background: Vertical root fracture (VRF) is a common problem in endodontically treated teeth. Due to its poor prognosis, a reliable technique must be used to make an accurate diagnosis. Cone beam computed tomography (CBCT) has been recently introduced for maxillofacial imaging. Despite the high diagnostic value of this method, metal artifacts resulting from intra-canal posts still make the detection of VRFs challenging. Objectives: This study aimed to assess the effect of object position in the field of view (FOV) of CBCT on detection of VRFs in teeth with intra-canal posts. Materials and Methods: The crowns of 60 extracted premolar teeth were cut at the level of cementoenamel junction (CEJ). Root canals were filled with gutta-percha and filling of the coronal 2/3 of the root canals was subsequently removed to fabricate intra-canal cast posts. The teeth were randomly divided into two groups of 30. Fracture was induced in group one using an Instron machine. Group two was considered as the control group with no fracture. All teeth were then randomly positioned and scanned in five different positions starting at the center of the FOV as well as right, left anterior and posterior relative to the center (3, 9, 12, and 6 O’clock) via the New Tom VGI CBCT unit. Two observers evaluated images for VRFs. Sensitivity and specificity of fracture diagnosis in each position was calculated in comparison with the gold standard. Wilcoxon test was used for data analysis. Results: Considering deterministic and probabilistic diagnostic parameters, probabilistic sensitivity was similar in all positions; but probabilistic specificity of the center position (65.1%) was significantly higher than that of 6 and 12 O’clock positions. Considering the deterministic diagnostic parameters, the overall sensitivity and specificity values decreased in all positions in FOV, but sensitivity of the center position of FOV was significantly higher than that of other positions; specificity was

  18. Secondary anterior crocodile shagreen of Vogt.

    Science.gov (United States)

    Tripathi, R C; Bron, A J

    1975-01-01

    The clincopathological features and pathogenesis of secondary mosaic degeneration of the cornea (anterior crocodile shagreen of Vogt) are described. The structural basis for the normal anterior corneal mosaic pattern seems to lie in the particular arrangement of many prominent collagen lamellae of the anterior stroma that thake an oblique course to gain insertion into Bowman's layer. Since, at normal intraocular pressure, Bowman's layer is under tension, when viewed from the anterior surface the cornea appears smooth. By releasing the tension, however, a reproducible polygonal ridge pattern becomes manifest. It is suggested that a prolonged phthisical state of the eye is one condition wherein the mosaic pattern may become permanent and that, as a secondary event, this is followed by irregular calcification of Bowman's layer which particularly involves the ridges projecting into the epithelium. Biomicroscopically these ridges corresponded to the branching reticular arrangement of the mosaic opacities. Images PMID:1079137

  19. Anterior Cervical Discectomy and Fusion with Plating

    Medline Plus

    Full Text Available Anterior Cervical Discectomy and Fusion with Plating Broward Health Medical Center Fort Lauderdale, FL November 17, 2011 I'm Dr. Matthew Moore, head of the Spine Care Center here at North Broward Medical Center. And ...

  20. Supernumerary Teeth in Indian Children: A Survey of 300 Cases

    Directory of Open Access Journals (Sweden)

    Amita Sharma

    2012-01-01

    Full Text Available The aim of this investigation was to study children with supernumerary teeth who visited the Department of Pedodontics and Preventive Dentistry, Government Dental College and Hospital, Rohtak, Haryana, India. Only children with supernumerary teeth were included in the study while patients having supernumerary teeth with associated syndromes were excluded. Supernumeraries were detected by clinical and radiographic examination. The results indicated that males were affected more than females with a sex ratio of 2.9 : 1. Single supernumerary tooth was seen in 79% of the patients, 20% had double, and 1% had three or more supernumeraries. Premaxillary supernumeraries accounted for 93.8% of the cases. Conical shaped supernumerary teeth were the most common type (59.7%. Majority of supernumeraries remained unerupted (65%. Fusion of supernumerary tooth with a regular tooth was observed in 4% of the patients. Talon cusp, an associated dental anomaly, was seen in 5% of the cases. Simultaneous hypodontia occurred in 2.3% of patients with supernumeraries.

  1. Implants and/or teeth: consensus statements and recommendations

    DEFF Research Database (Denmark)

    Gotfredsen, K; Carlsson, G E; Jokstad, A;

    2008-01-01

    In August 23-25, 2007, the Scandinavian Society for Prosthetic Dentistry in collaboration with the Danish Society of Oral Implantology arranged a consensus conference on the topic 'Implants and/or teeth'. It was preceded by a workshop in which eight focused questions were raised and answered in...

  2. Transplantation of premolars as an approach for replacing avulsed teeth

    DEFF Research Database (Denmark)

    Andreasen, Jens Ove; Schwartz, Ole; Kofoed, Thomas;

    2009-01-01

    . Secondly the tooth precipitates growth of the alveolar procces and allows treatment to be performed at an early age (10-12 years) where the trauma incidence is at its maximum. Finally transplanted teeth can be moved orthodontically. These characteristics make implant solutions appealing in a number of...

  3. Analysis of human teeth for Pb-210 and Po-210

    International Nuclear Information System (INIS)

    The cumulative radon daughter exposure of miners in units of working level months is estimated by measuring the Pb-210 content of their teeth. The exposure value so estimated agrees reasonably well with measured working levels. The exposure of coal miners is not significant

  4. BARIUM IN TEETH AS INDICATOR OF BODY BURDEN

    Science.gov (United States)

    A study was conducted to determine the biological availability of naturally occurring barium in a municipal drinking water by the analysis of barium in deciduous teeth of children. The grade school children of two Illinois towns were chosen for the study. The towns were chosen ba...

  5. Functional Outcomes of Primary Anterior Cruciate Ligament Reconstruction with Tibialis Anterior Allograft

    OpenAIRE

    Başar, Selda; Büyükafşar, Enes; Hazar, Zeynep; Ataoğlu, Baybars; Kanatlı, Ulunay

    2014-01-01

    Objectives: Allografts have potential advantages in primary anterior cruciate ligament reconstruction (ACLR), including the absence of donor site morbidity, shorter operative times, improved cosmesis, and easier rehabilitation. There is limited and conflicting outcome data for ACLR with tibialis anterior allograft. The purpose of this study was to evaluate the functional outcomes of ACLR with tibialis anterior allograft. Methods: We retrospectively evaluated patients underwent ACLR using with...

  6. Anterior Eye Imaging with Optical Coherence Tomography

    Science.gov (United States)

    Huang, David; Li, Yan; Tang, Maolong

    The development of corneal and anterior segment optical coherence tomography (OCT) technology has advanced rapidly in recently years. The scan geometry and imaging wavelength are both important choices to make in designing anterior segment OCT systems. Rectangular scan geometry offers the least image distortion and is now used in most anterior OCT systems. The wavelength of OCT light source affects resolution and penetration. An optimal choice of the OCT imaging wavelength (840, 1,050, or 1,310 nm) depends on the application of interest. Newer generation Fourier-domain OCT technology can provide scan speed 100-1000 times faster than the time-domain technology. Various commercial anterior OCT systems are available on the market. A wide spectrum of diagnostic and surgical applications using anterior segment OCT had been investigated, including mapping of corneal and epithelial thicknesses, keratoconus screening, measuring corneal refractive power, corneal surgery planning and evaluation in LASIK, intracorneal ring implantation, assessment of angle closure glaucoma, anterior chamber biometry and intraocular lens implants, intraocular lens power calculation, and eye bank donor cornea screening.

  7. A Fatal Fad? Tongue Studs Cause More Problems Than Chipped Teeth

    Science.gov (United States)

    ... more Seniors' Oral Health How to Keep Your Teeth for a Lifetime Tooth loss is simply the ... Fad? Tongue Studs Cause More Problems Than Chipped Teeth Article Chapters A Fatal Fad? Tongue Studs Cause ...

  8. Take Care of Your Teeth | NIH MedlinePlus the Magazine

    Science.gov (United States)

    ... please turn Javascript on. Feature: Fighting Gum Disease Take Care of Your Teeth Past Issues / Fall 2010 Table ... or gets worse depends on how well you take care of your teeth and gums every day, from ...

  9. Parental beliefs about children's teething in Udaipur, India: a preliminary study

    Directory of Open Access Journals (Sweden)

    Gauri Kakatkar

    2012-04-01

    Full Text Available Throughout history, teething has been held responsible for a variety of childhood illnesses. The objective of this study was to assess parents' knowledge and beliefs about teething signs and symptoms and to investigate the practices used to alleviate teething troubles. A cross-sectional survey was conducted using a self-administered questionnaire distributed to 550 parents in Udaipur, India. The questionnaire contained three sections eliciting demographic characteristics and assessing parents' knowledge, beliefs, and practices regarding teething. Statistical analysis used descriptive statistics and the chi-squared test (p £ 0.05. Response to teething was incorrectly attributed to fever (70%, diarrhea (87.5%, and sleep disturbances (48.2%. Only 33.2% of parents allowed their children to bite on chilled objects to relieve symptoms associated with teething. A common lack of knowledge about teething among parents should encourage dental healthcare providers to educate them regarding the teething process and its management.

  10. Pulp microbiology of complete teeth with idiopathic apical lesions.

    Directory of Open Access Journals (Sweden)

    Patricia Rodríguez

    2009-11-01

    Full Text Available Introduction: Periapical changes named as lesions, in teeth with full crown integrity and without history of trauma, do not show a clear aetiology. Objective: To determine the presence of microorganisms in pulp dental tissue will clarify the cause of its death and therefore the damage to periodontal tissues. Materials and methods: From people between 10 and 39 years old, 23 teeth were selected. The samples were taken with paper points and 0.8 sterile files, and were transported in VMGA III medium, to be processed in the following 24 hours after they were taken and sowed in Brucella-agar. Results: The most affected teeth were upper central incisors, 43.8%. From the 23 studied teeth, microbiological grow was seen on 20 teeth. The following microorganisms species were identified: Fusobacterium spp., 25%, Eubacterium spp., 15%; Peptostreptococcus spp., 10%; Campylobacter spp., 10%; gram negative enteric bacteria, 10%; Porphyromonas gingivalis, 10%; Prevotella intermedia, 5%; Eikenellia corrodens, 5%; Dialister pneumosintes, 5%; and yeasts, 5%. There was no growing evidence of Actinomyces actinomycetemcomitans, Tanerella forsythensis and Streptococcus β  hemolytic. Discussion and conclusions: Sound pulp dental tissue is sterile; an injury over it will cause its inflammation, degeneration, death and bacterial contamination. Results in the present study clearly show the presence of microorganisms in closed apical dental lesions of endodontic origin. In same manner, it was seen that a great part of microorganisms species found can be regarded as periodontal pathogens. This could suggest a management with an endodontic, a periodontic and a pharmacological combined treatment.

  11. Hen's teeth with enamel cap: from dream to impossibility

    Directory of Open Access Journals (Sweden)

    Girondot Marc

    2008-09-01

    Full Text Available Abstract Background The ability to form teeth was lost in an ancestor of all modern birds, approximately 100-80 million years ago. However, experiments in chicken have revealed that the oral epithelium can respond to inductive signals from mouse mesenchyme, leading to reactivation of the odontogenic pathway. Recently, tooth germs similar to crocodile rudimentary teeth were found in a chicken mutant. These "chicken teeth" did not develop further, but the question remains whether functional teeth with enamel cap would have been obtained if the experiments had been carried out over a longer time period or if the chicken mutants had survived. The next odontogenetic step would have been tooth differentiation, involving deposition of dental proteins. Results Using bioinformatics, we assessed the fate of the four dental proteins thought to be specific to enamel (amelogenin, AMEL; ameloblastin, AMBN; enamelin, ENAM and to dentin (dentin sialophosphoprotein, DSPP in the chicken genome. Conservation of gene synteny in amniotes allowed definition of target DNA regions in which we searched for sequence similarity. We found the full-length chicken AMEL and the only N-terminal region of DSPP, and both are invalidated genes. AMBN and ENAM disappeared after chromosomal rearrangements occurred in the candidate region in a bird ancestor. Conclusion These findings not only imply that functional teeth with enamel covering, as present in ancestral Aves, will never be obtained in birds, but they also indicate that these four protein genes were dental specific, at least in the last toothed ancestor of modern birds, a specificity which has been questioned in recent years.

  12. Lesiones del ligamento cruzado anterior

    Directory of Open Access Journals (Sweden)

    Alejandro Álvarez López

    2015-01-01

    Full Text Available Fundamento: el ligamento cruzado anterior desempeña un papel muy importante en la estabili-dad de la rodilla. La incidencia de esta afección es alta en pacientes que practican deportes de contacto y de no ser tratados de forma adecuada, los resultados son desfavorables. Objetivo: profundizar en los factores necesarios para el tratamiento adecuado de enfermos con esta lesión y evitar las complicaciones. Método: se realizó una revisión bibliográfica de un total de 300 artículos publicados en Pubmed, Hinari y Medline mediante el localizador de información Endnote, de ellos se utilizaron 52 citas selecciona-das para realizar la revisión, 48 de ellas de los últimos cinco años donde se incluyeron seis libros. Desarrollo: se discuten los aspectos relacionados con el diagnóstico clínico e imaginológico. Se aborda la clasificación de esta lesión en cuanto a varios aspectos como: tiempo, lesión de ligamentos u ósea, aislada o combinada y parcial o total. Se mencionan los parámetros para obtener resultados satisfac-torios al considerar factores como la edad del enfermo, lesiones asociadas y tiempo de la lesión. Se relacio-nan los requisitos para la selección del implante y se mostró las ventajas y desventajas de cada tipo de in-jerto. Las complicaciones de esta cirugía están relacionadas con la técnica quirúrgica y médicas. Conclusiones: las lesiones del ligamento son entidades traumáticas que afectan por lo general a pacientes jóvenes. Para lograr un resultado satisfactorio en el tratamiento es necesario el conocimiento de su anatomía, clasificación, tipo de injerto a emplear según sus ventajas y desventajas.

  13. A Study on Effect of Surface Treatments on the Shear Bond Strength between Composite Resin and Acrylic Resin Denture Teeth

    OpenAIRE

    Chatterjee, Nirmalya; Gupta, Tapas K.; Banerjee, Ardhendu

    2011-01-01

    Visible light-cured composite resins have become popular in prosthetic dentistry for the replacement of fractured/debonded denture teeth, making composite denture teeth on partial denture metal frameworks, esthetic modification of denture teeth to harmonize with the characteristics of adjacent natural teeth, remodelling of worn occlusal surfaces of posterior denture teeth etc. However, the researches published on the bond strength between VLC composite resins and acrylic resin denture teeth i...

  14. Percutaneous ultrasound-guided aspiration of an anterior cruciate ligament ganglion cyst: description of technique and case presentation.

    Science.gov (United States)

    Krill, Michael; Peck, Evan

    2014-12-01

    An anterior cruciate ligament ganglion cyst is an infrequent but potentially clinically significant cause of knee pain. Although the cyst may be removed surgically, percutaneous ultrasound-guided anterior cruciate ligament ganglion cyst aspiration and injection is feasible. To our knowledge, we present the first reported case description of the utilization of ultrasound guidance to perform this procedure with a successful clinical outcome. PMID:25088315

  15. Diagnostic Criteria in Choosing a Method of Deciduous Teeth Periodontitis Treatment

    OpenAIRE

    Sheshukova, O. V.

    2015-01-01

    The study involved 38 children at the age of 5 to 9 years with chronic periodontitis of deciduous teeth. Exctracted teeth on account of chronic periodontitis were evaluated according to the level of resorption using the developed classification of resorption of deciduous teeth roots.According to the analysis of the research data chronic periodontitis of deciduous teeth led to faster resorption of their roots earlier by 2.5-4.5 years. Exctraction of deciduous tooth is advisable in determining ...

  16. Etiology and prevention of external cervical root resorption associated to teeth bleaching

    OpenAIRE

    Eliane Mendes da SILVA; Leonardi, Denise Piotto; Gisele Aihara HARAGUSHIKU; Flávia Sens Fagundes TOMAZINHO; Flares BARATTO FILHO; João César ZIELAK

    2010-01-01

    Introduction and objective: Esthetic dentistry has been prioritizedand the desire for whiter teeth has been increasingly present in dental offices, since whiter teeth tend to indicate health, beauty, youth and a more attractive smile. Teeth bleaching is a conservative method widely used to restore the original color of darkened teeth. However, possible relations with the external cervical root resorption have concerned many researchers and clinicians. Literature review: There are many mechani...

  17. Mesiodens with an unusual morphology and multiple impacted supernumerary teeth in a non-syndromic patient

    OpenAIRE

    Srivatsan Pavithra; Aravindha Babu N

    2007-01-01

    Supernumerary teeth are a relatively frequent disorder of odontogenesis characterized by an excess number of teeth. Mesiodens is the most common type of supernumerary tooth found in the premaxilla between the two central incisors. They can be supplemental (resembling natural teeth), conical, tuberculate or molariform. We present the case of a 19 year-old girl who presented with a mesiodens of an unusual morphology and multiple impacted supernumerary teeth not associated with any syndrome.

  18. Mesiodens with an unusual morphology and multiple impacted supernumerary teeth in a non-syndromic patient

    Directory of Open Access Journals (Sweden)

    Srivatsan Pavithra

    2007-01-01

    Full Text Available Supernumerary teeth are a relatively frequent disorder of odontogenesis characterized by an excess number of teeth. Mesiodens is the most common type of supernumerary tooth found in the premaxilla between the two central incisors. They can be supplemental (resembling natural teeth, conical, tuberculate or molariform. We present the case of a 19 year-old girl who presented with a mesiodens of an unusual morphology and multiple impacted supernumerary teeth not associated with any syndrome.

  19. Muscles advance the teeth in sand dollars and other sea urchins

    OpenAIRE

    Ellers, O.; Telford, M.

    1997-01-01

    We demonstrate the action of the dental promoter muscles in advancing the continuously growing teeth of sand dollars and sea urchins. Teeth wear at the occlusal end, while new calcite is added to the opposite end. Dental ligaments rigidly hold teeth during chewing, but soften and reform during advancement. The source of forces that advance the teeth was unknown until our discovery of the dental promoter muscles. The muscles, which underly the tooth, attach centrally to the stereom of the pyra...

  20. Prevalence of impacted and supernumerary teeth in the North Indian population

    OpenAIRE

    Santosh, Patil; Maheshwari, Sneha

    2014-01-01

    Objectives: Dental impaction is a very frequent problem. Supernumerary teeth, or hyperdontia, are the presence of additional teeth to the normal series in the either of the dentition. The presence of impacted and/or supernumerary teeth can cause various complications. The objective of the present study was to determine the prevalence of impacted and supernumerary teeth in the North Indian population. Study Design: The panoramic radiographic records of 4750 patients attending the Department of...