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Sample records for class iii malocclusion

  1. Pseudo Class III malocclusion.

    Science.gov (United States)

    Al-Hummayani, Fadia M

    2016-04-01

    The treatment of deep anterior crossbite is technically challenging due to the difficulty of placing traditional brackets with fixed appliances. This case report represents a none traditional treatment modality to treat deep anterior crossbite in an adult pseudo class III malocclusion complicated by severely retruded, supraerupted upper and lower incisors. Treatment was carried out in 2 phases. Phase I treatment was performed by removable appliance "modified Hawley appliance with inverted labial bow," some modifications were carried out to it to suit the presented case. Positive overbite and overjet was accomplished in one month, in this phase with minimal forces exerted on the lower incisors. Whereas, phase II treatment was performed with fixed appliances (braces) to align teeth and have proper over bite and overjet and to close posterior open bite, this phase was accomplished within 11 month.

  2. Genes, genetics, and Class III malocclusion.

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    Xue, F; Wong, R W K; Rabie, A B M

    2010-05-01

    To present current views that are pertinent to the investigation of the genetic etiology of Class III malocclusion. Class III malocclusion is thought to be a polygenic disorder that results from an interaction between susceptibility genes and environmental factors. However, research on family pedigrees has indicated that Class III malocclusion might also be a monogenic dominant phenotype. Recent studies have reported that genes that encode specific growth factors or other signaling molecules are involved in condylar growth under mechanical strain. These genes, which include Indian hedgehog homolog (IHH), parathyroid-hormone like hormone (PTHLH), insulin-like growth factor-1 (IGF-1), and vascular endothelial growth factor (VEGF), and variations in their levels of expression play an important role in the etiology of Class III malocclusion. In addition, genome-wide scans have revealed chromosomal loci that are associated with Class III malocclusion. It is likely that chromosomal loci 1p36, 12q23, and 12q13 harbor genes that confer susceptibility to Class III malocclusion. In a case-control association study, we identified erythrocyte membrane protein band 4.1 (EPB41) to be a new positional candidate gene that might be involved in susceptibility to mandibular prognathism. Most of the earlier studies on the genetic etiology of Class III malocclusion have focused on the patterns of inheritance of this phenotype. Recent investigations have focused on understanding the genetic variables that affect Class III malocclusion and might provide new approaches to uncovering the genetic etiology of this phenotype.

  3. Timely management of developing class III malocclusion

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    M R Yelampalli

    2012-01-01

    Full Text Available Timing of orthodontic treatment, especially for children with developing class III malocclusions, has always been somewhat controversial, and definitive treatment tends to be delayed for severe class III cases. Developing class III patients with moderate to severe anterior crossbite and deep bite may need early intervention in some selected cases. Class III malocclusion may develop in children as a result of an inherent growth abnormality, i.e. true class III malocclusion, or as a result of premature occlusal contacts causing forward functional shift of the mandible, which is known as pseudo class III malocclusion. These cases, if not treated at the initial stage of development, interfere with normal growth of the jaw bases and may result in severe facial deformities. The treatment should be carried out as early as possible for permitting normal growth of the skeletal bases. This paper deals with the selection of an appropriate appliance from the various current options available for early intervention in developing class III malocclusion through two case reports.

  4. Timely management of developing class III malocclusion.

    Science.gov (United States)

    Yelampalli, M R; Rachala, M R

    2012-01-01

    Timing of orthodontic treatment, especially for children with developing class III malocclusions, has always been somewhat controversial, and definitive treatment tends to be delayed for severe class III cases. Developing class III patients with moderate to severe anterior crossbite and deep bite may need early intervention in some selected cases. Class III malocclusion may develop in children as a result of an inherent growth abnormality, i.e. true class III malocclusion, or as a result of premature occlusal contacts causing forward functional shift of the mandible, which is known as pseudo class III malocclusion. These cases, if not treated at the initial stage of development, interfere with normal growth of the jaw bases and may result in severe facial deformities. The treatment should be carried out as early as possible for permitting normal growth of the skeletal bases. This paper deals with the selection of an appropriate appliance from the various current options available for early intervention in developing class III malocclusion through two case reports.

  5. Class - III malocclusion: Genetics or environment? A twins study

    OpenAIRE

    Jena A; Duggal R; Mathur V; Parkash H

    2005-01-01

    Etiology of class-III malocclusion is generally believed to be genetic. A wide range of environmental factors have been suggested as contributing factors for the development of class-III malocclusion. Twin study is one of the most effective methods available for investigating genetically determined variables of malocclusion. Discordancy for class-III malocclusion is a frequent finding in dizygotic twins. However, class-III malocclusion discordancy in monozygotic twins is a rare finding. The p...

  6. Malocclusion class III treatment in teething decidua.

    OpenAIRE

    Chávez Sevillano, Manuel Gustavo; Departamento Académico de Estomatología Pediátrica, Facultad de Odontología de la Universidad Nacional Mayor de San Marcos, Lima, Perú.

    2014-01-01

    According as age increases, growth decreases and Class III skeletal patterns become more stable. The objective of Class III malocclusion’s treatment in primary dentition is to get a favorable environment to achieve a better dentofacial development. This article’s objective is to give a theorical summary about treatment of Class III malocclusions in primary dentition, and to present a case report. A medida que aumenta la edad, la cuantía de crecimiento disminuye y las clases III esquelética...

  7. Early cephalometric characteristics in Class III malocclusion

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    Vanessa Costa Farias

    2012-04-01

    Full Text Available OBJECTIVE: Early identification of craniofacial morphological characteristics allows orthopedic segmented interventions to attenuate dentoskeletal discrepancies, which may be partially disguised by natural dental compensation. To investigate the morphological characteristics of Brazilian children with Class III malocclusion, in stages I and II of cervical vertebrae maturation and compare them with the characteristics of Class I control patients. METHODS: Pre-orthodontic treatment records of 20 patients with Class III malocclusion and 20 control Class I patients, matched by the same skeletal maturity index and sex, were selected. The craniofacial structures and their relationships were divided into different categories for analysis. Angular and linear measures were adopted from the analyses previously described by Downs, Jarabak, Jacobson and McNamara. The differences found between the groups of Class III patients and Class I control group, both subdivided according to the stage of cervical vertebrae maturation (I or II, were assessed by analysis of variance (ANOVA, complemented by Bonferroni's multiple mean comparisons test. RESULTS: The analysis of variance showed statistically significant differences in the different studied groups, between the mean values found for some angular (SNA, SNB, ANB and linear variables (Co - Gn, N - Perp Pog, Go - Me, Wits, S - Go, Ar - Go. CONCLUSION: Assessed children displaying Class III malocclusion show normal anterior base of skull and maxilla, and anterior positioning of the mandible partially related to increased posterior facial height with consequent mandibular counterclockwise rotation.

  8. Orthodontic treatment alternative to a class III subdivision malocclusion

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    Guilherme Janson

    2009-08-01

    Full Text Available Class III malocclusions are considered one of the most complex and difficult orthodontic problems to diagnose and treat. Skeletal and/or dental asymmetries in patients presenting with Class III malocclusions can worsen the prognosis. Recognizing the dentoalveolar and skeletal characteristics of subdivision malocclusions and their treatment possibilities is essential for a favorable nonsurgical correction. Therefore, this article presents a nonsurgical asymmetric extraction approach to Class III subdivision malocclusion treatment which can significantly improve the occlusal and facial discrepancies.

  9. Class - III malocclusion: Genetics or environment? A twins study

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    Jena A

    2005-03-01

    Full Text Available Etiology of class-III malocclusion is generally believed to be genetic. A wide range of environmental factors have been suggested as contributing factors for the development of class-III malocclusion. Twin study is one of the most effective methods available for investigating genetically determined variables of malocclusion. Discordancy for class-III malocclusion is a frequent finding in dizygotic twins. However, class-III malocclusion discordancy in monozygotic twins is a rare finding. The purpose of this study of monozygotic twins is to assess the genetic and environmental components of variation within the cranio-dento-facial complex.

  10. Expansion/Facemask Treatment of an Adult Class III Malocclusion

    OpenAIRE

    Jackson, Gregory W.; Kravitz, Neal D.

    2014-01-01

    The orthodontic treatment of class III malocclusion with a maxillary deficiency is often treated with maxillary protraction with or without expansion. Skeletal and dental changes have been documented which have combined for the protraction of the maxilla and the correction of the class III malocclusion. Concerning the ideal time to treat a developing class III malocclusion, studies have reported that, although early treatment may be the most effective, face mask therapy can provide a viable o...

  11. [Prosthetic rehabilitation in patient with forced class III malocclusion].

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    Krunić, N; Kostić, M; Janośević, P; Petrović, D; Kostić, I; Petrović, M; Igić, M

    2014-01-01

    The paper presents clinical case of 63 years old edentulous patient with slight class III malocclusion. For 15 years he was using inadequately fabricated dentures causing forced severe class III malocclusion. Forced progeny was corrected by newly fabricated dentures which restored normal orofacial function and facial harmony.

  12. Class III Malocclusion Surgical-Orthodontic Treatment

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    Bruna Alves Furquim

    2014-01-01

    Full Text Available The aim of the present case report is to describe the orthodontic-surgical treatment of a 17-year-and-9-month-old female patient with a Class III malocclusion, poor facial esthetics, and mandibular and chin protrusion. She had significant anteroposterior and transverse discrepancies, a concave profile, and strained lip closure. Intraorally, she had a negative overjet of 5 mm and an overbite of 5 mm. The treatment objectives were to correct the malocclusion, and facial esthetic and also return the correct function. The surgical procedures included a Le Fort I osteotomy for expansion, advancement, impaction, and rotation of the maxilla to correct the occlusal plane inclination. There was 2 mm of impaction of the anterior portion of the maxilla and 5 mm of extrusion in the posterior region. A bilateral sagittal split osteotomy was performed in order to allow counterclockwise rotation of the mandible and anterior projection of the chin, accompanying the maxillary occlusal plane. Rigid internal fixation was used without any intermaxillary fixation. It was concluded that these procedures were very effective in producing a pleasing facial esthetic result, showing stability 7 years posttreatment.

  13. Conservative compensatory Angle Class III malocclusion treatment

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    Marcio Costa Sobral

    2012-12-01

    Full Text Available INTRODUCTION: Angle's Class III malocclusion is a dental discrepancy in a sagittal view that may appear or not with an important skeletal discrepancy. Facial esthetics may be affected by this skeletal discrepancy and it is one of the most common complaints of patients who seek orthodontic treatment. Class III treatment, in adults, may be done by compensatory tooth movement, in simple cases, or through an association between orthodontics and orthognathic surgery, in more severe cases. OBJECTIVE: This article describes a non-extraction compensatory Class III treatment case, applying the Tweed-Merrifield mechanical principles with headgear (J-Hook in the mandibular arch. This case was presented at the V Brazilian Association of Orthodontics and Dentofacial Orthopedics (ABOR Meeting, it was evaluated by members of Brazilian Board of Orthodontics and obtained third place in the general classification.INTRODUÇÃO: a má oclusão de Classe III se caracteriza por uma desarmonia dentária anteroposterior, podendo estar ou não acompanhada por discrepâncias esqueléticas. A estética facial pode se apresentar comprometida, em maior ou menor grau, a depender da magnitude da discrepância, constituindo um dos principais fatores motivadores da procura por tratamento ortodôntico. O tratamento da Classe III em pacientes adultos pode ser realizado mediante compensação dentária, nos casos mais simples, ou, em situações mais severas, mediante a associação entre Ortodontia e Cirurgia Ortognática. OBJETIVO: o presente artigo objetiva relatar um caso clínico caracterizado por uma má oclusão de Classe III de Angle, tratado de forma compensatória, com extração dos terceiros molares inferiores, mediante a utilização de aparelhagem extrabucal na arcada inferior (J-hook, aplicando-se princípios da técnica de Tweed-Merrifield. Esse caso foi apresentado no 5º Congresso da Associação Brasileira de Ortodontia e Ortopedia Facial (ABOR, na categoria

  14. Expansion/Facemask Treatment of an Adult Class III Malocclusion.

    Science.gov (United States)

    Jackson, Gregory W; Kravitz, Neal D

    2014-01-01

    The orthodontic treatment of class III malocclusion with a maxillary deficiency is often treated with maxillary protraction with or without expansion. Skeletal and dental changes have been documented which have combined for the protraction of the maxilla and the correction of the class III malocclusion. Concerning the ideal time to treat a developing class III malocclusion, studies have reported that, although early treatment may be the most effective, face mask therapy can provide a viable option for older children as well. But what about young adults? Can the skeletal and dental changes seen in expansion/facemask therapy in children and adolescents be demonstrated in this age group as well, possibly eliminating the need for orthodontic dental camouflage treatment or orthognathic surgery? A case report is presented of an adult class III malocclusion with a Class III skeletal pattern and maxillary retrusion. Treatment was with nonextraction, comprehensive edgewise mechanics with slow maxillary expansion with a bonded expander and protraction facemask.

  15. Non-surgical treatment of skeletal class III malocclusion

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    Kapadia, Romina M; Shah, Adit P; Diyora, Shamil D; Rathva, Vandana J

    2014-01-01

    The incidence of skeletal class III malocclusion has a mean of 3% in the Caucasian population, 5% in African-American adolescents and about 14% in the Asian population. In India, the incidence of class III malocclusion is reported to be 3.4%. A patient having class III malocclusion shows findings ranging from edge-to-edge bite to large reverse overjet, with extreme variations of underlying skeletal jaw bases and craniofacial form. This is a case report of a 20-year-old man having skeletal cla...

  16. Diagnosis and Treatment of Pseudo-Class III Malocclusion.

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    Reyes, Ariel; Serret, Luis; Peguero, Marcos; Tanaka, Orlando

    2014-01-01

    Pseudo-Class III malocclusion is characterized by the presence of an anterior crossbite due to a forward functional displacement of the mandible; in most cases, the maxillary incisors present some degree of retroclination, and the mandibular incisors are proclined. Various types of appliances have been described in the literature for the early treatment of pseudo-Class III malocclusion. The objectives of this paper are to demonstrate the importance of making the differential diagnosis between a skeletal and a pseudo-Class III malocclusion and to describe the correction of an anterior crossbite. The association of maxillary expansion and a 2 × 4 appliance can successfully be used to correct anterior crossbites.

  17. Non-surgical treatment of skeletal class III malocclusion.

    Science.gov (United States)

    Kapadia, Romina M; Shah, Adit P; Diyora, Shamil D; Rathva, Vandana J

    2014-04-10

    The incidence of skeletal class III malocclusion has a mean of 3% in the Caucasian population, 5% in African-American adolescents and about 14% in the Asian population. In India, the incidence of class III malocclusion is reported to be 3.4%. A patient having class III malocclusion shows findings ranging from edge-to-edge bite to large reverse overjet, with extreme variations of underlying skeletal jaw bases and craniofacial form. This is a case report of a 20-year-old man having skeletal class III malocclusion with concave profile, anterior crossbite and a negative overjet of 3 mm treated non-surgically with extraction of only one lower left first premolar.

  18. Early Treatment Protocol for Skeletal Class III Malocclusion

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    Oltramari-Navarro,Paula Vanessa Pedron; de Almeida, Renato Rodrigues; Ana Cláudia de Castro Ferreira CONTI; Navarro, Ricardo de Lima; de Almeida, Marcio Rodrigues; Fernandes,Leandra Sant'Anna Ferreira Parron

    2013-01-01

    Skeletal Class III malocclusion, with its unpredictable and unfavorable nature, has been characterized by a growth pattern with doubtful prognosis regarding orthodontic mechanics, even when performed early. For a long time, Class III malocclusion was regarded as a synonym of mandibular prognathism, regardless of the affected skeletal structures. Mandibular growth, essentially determined by genetic factors, could barely be controlled by early orthodontic interventions. Therefore, the treatment...

  19. Diagnosis and Treatment of Pseudo-Class III Malocclusion

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    Ariel Reyes; Luis Serret; Marcos Peguero; Orlando Tanaka

    2014-01-01

    Pseudo-Class III malocclusion is characterized by the presence of an anterior crossbite due to a forward functional displacement of the mandible; in most cases, the maxillary incisors present some degree of retroclination, and the mandibular incisors are proclined. Various types of appliances have been described in the literature for the early treatment of pseudo-Class III malocclusion. The objectives of this paper are to demonstrate the importance of making the differential diagnosis between...

  20. Class III malocclusion with severe anteroposterior discrepancy

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    Susana Maria Deon Rizzatto

    2012-10-01

    Full Text Available This study aims at reporting the clinical case of a patient with Class III skeletal malocclusion with severe maxillary deficiency, producing a reduced midface associated with severe mandibular prognathism. The pre-surgical orthodontic preparation was composed mainly by dentoalveolar expansion and repositioning of the incisors in the lower arch. Then, a combined maxillary and mandibular orthognathic surgery was performed. The treatment objectives were achieved, with significant improvement in facial esthetics and occlusion, followed by post-treatment stability. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO, as part of the requirements for obtaining the title of Diplomate by BBO.O objetivo deste artigo é relatar o caso clínico de um paciente portador de má oclusão de Classe III esquelética com acentuada deficiência maxilar, causando redução do terço médio da face, associada a severo prognatismo mandibular. O preparo ortodôntico pré-cirúrgico foi composto, principalmente, pela expansão dentoalveolar da maxila e o reposicionamento dos incisivos na arcada inferior. Depois, foi realizada a cirurgia ortognática combinada maxilomandibular. Os objetivos do tratamento foram atingidos, com significativa melhora da oclusão e da estética facial, seguida de estabilidade pós-tratamento. Esse caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, como parte dos requisitos para obtenção do título de Diplomado pelo BBO.

  1. Early treatment protocol for skeletal Class III malocclusion.

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    Oltramari-Navarro, Paula Vanessa Pedron; de Almeida, Renato Rodrigues; Conti, Ana Cláudia de Castro Ferreira; Navarro, Ricardo de Lima; de Almeida, Marcio Rodrigues; Fernandes, Leandra Sant'Anna Ferreira Parron

    2013-01-01

    Skeletal Class III malocclusion, with its unpredictable and unfavorable nature, has been characterized by a growth pattern with doubtful prognosis regarding orthodontic mechanics, even when performed early. For a long time, Class III malocclusion was regarded as a synonym of mandibular prognathism, regardless of the affected skeletal structures. Mandibular growth, essentially determined by genetic factors, could barely be controlled by early orthodontic interventions. Therefore, the treatment choice was to wait for the patient to grow, and then make an orthodontic intervention associated with an orthognathic surgery. Maxillary involvement in the etiology of Class III malocclusion was conclusive to change orthodontic therapeutics. Maxillary intramembranous growth has a better response to orthopedic treatment, based on growth control and redirection, thus contributing for early intervention success. In several cases, excellent results have been achieved with rapid maxillary expansion and protraction. The aim of this study was to describe and discuss the treatment of a patient with Class III malocclusion, whose treatment planning comprised two phases: interceptive (mechanical orthopedic appliances) and comprehensive (fixed orthodontic appliance). The results of this case showed that Class III malocclusion should be intercepted as early as possible to permit growth redirection, mainly when the maxilla is the primary etiologic factor or dental and/or functional factors are involved. Diagnosis, treatment planning and prognosis depend on patient age, growth potential and severity of malocclusion. Early intervention, adequate indication of appliances, and patient compliance are key factors for good outcomes.

  2. DIAGNOSTIC GUIDANCE AND EARLY INTERVENTION IN CLASS III MALOCCLUSION

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    Rinandri Charea Runizar

    2015-06-01

    Full Text Available Timing of orthodontic treatment for Class III malocclusion has always been somewhat controversial. Many orthodontic pioneers like Angle, Tweed, and Graber have advocated early interception of class II malocclusion because this kind of skeletal discrepancy once established, would usually progress rapidly. What kind of early treatment would be appropriate for this malocclusion? Would this approach be effective and promises a stable result? Early orthodontic treatment is defined as a treatment that is initiated during the primary or mixed dentition stage to enhance skeletal and dental development. It is usually done in two phases. The first phase is intended to correct skeletal discrepancy by taking advantage of growth and development period. The second phase followed to improve occlusal relationship. Early treatment of Class III malocclusion is a possible alternative to improve skeletal discrepancy or at the very east may serve to prevent a worsening malocclusion. Principles of Class III early treatment depend on whether it is dental Class III, functional Class III, or skeletal Class III. Practitioners should consider positive and negative factors of a patient before initiating treatment. Likewise, they should understand factors that affect prognosis and stability of the results.

  3. Diagnosis and Treatment of Pseudo-Class III Malocclusion

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    Ariel Reyes

    2014-01-01

    Full Text Available Pseudo-Class III malocclusion is characterized by the presence of an anterior crossbite due to a forward functional displacement of the mandible; in most cases, the maxillary incisors present some degree of retroclination, and the mandibular incisors are proclined. Various types of appliances have been described in the literature for the early treatment of pseudo-Class III malocclusion. The objectives of this paper are to demonstrate the importance of making the differential diagnosis between a skeletal and a pseudo-Class III malocclusion and to describe the correction of an anterior crossbite. The association of maxillary expansion and a 2 × 4 appliance can successfully be used to correct anterior crossbites.

  4. Ortho-surgical management of skeletal Class III malocclusion.

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    Gupta, Rahul Kumar; Tikku, Tripti; Khanna, Rohit; Gupta, Hemant; Srivastava, Kamna; Verma, Sneh Lata

    2015-01-01

    Class III malocclusions are considered to be one of the most difficult problems to treat. Establishment of the treatment plan is based on the efficacy and thoughtful application by the clinician and easy acceptance by the patient. We are presenting a case report of an adult male patient with skeletal Class III malocclusion who was treated by orthosurgical approach in Department of Orthodontics in collaboration with Department of Oral and Maxillofacial Surgery. The treatment was complete with a positive overbite and acceptable occlusion and satisfactory facial esthetics using a combination approach.

  5. Archform comparisons between skeletal class II and III malocclusions.

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    Zou, Wei; Wu, JiaQi; Jiang, JiuHui; Xu, TianMin; Li, CuiYing

    2014-01-01

    The purpose of this cross-sectional research was to explore the relationship of the mandibular dental and basal bone archforms between severe Skeletal Class II (SC2) and Skeletal Class III (SC3) malocclusions. We also compared intercanine and intermolar widths in these two malocclusion types. Thirty-three virtual pretreatment mandibular models (Skeletal Class III group) and Thirty-five Skeletal Class II group pretreatment models were created with a laser scanning system. FA (the midpoint of the facial axis of the clinical crown)and WALA points (the most prominent point on the soft-tissue ridge)were employed to produce dental and basal bone archforms, respectively. Gained scatter diagrams of the samples were processed by nonlinear regression analysis via SPSS 17.0. The mandibular dental and basal bone intercanine and intermolar widths were significantly greater in the Skeletal Class III group compared to the Skeletal Class II group. In both groups, a moderate correlation existed between dental and basal bone arch widths in the canine region, and a high correlation existed between dental and basal bone arch widths in the molar region. The coefficient of correlation of the Skeletal Class III group was greater than the Skeletal Class II group. Fourth degree, even order power functions were used as best-fit functions to fit the scatter plots. The radius of curvature was larger in Skeletal Class III malocclusions compared to Skeletal Class II malocclusions (rWALA3>rWALA2>rFA3>rFA2). In conclusion, mandibular dental and basal intercanine and intermolar widths were significantly different between the two groups. Compared with Skeletal Class II subjects, the mandibular archform was more flat for Skeletal Class III subjects.

  6. Early treatment of Class III malocclusion with a tandem traction bow appliance

    OpenAIRE

    Sneha Basaveshwar Valgadde; Kishor Chougule

    2016-01-01

    Since Class III malocclusion is progressive in nature, the facial growth of Class III malocclusion worsens with age. Class III malocclusion is associated with a deviation in the sagittal relationship of the maxilla and the mandible, characterized by a deficient maxilla, retrognathic mandible, or a combination of both. The early orthopedic treatment of Class III malocclusions, at the end of primary dentition or the beginning of mixed dentition, prior to growth spurt, allows the accomplishment ...

  7. Orthodontics-surgical combination therapy for Class III skeletal malocclusion

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    Ravi, M. S.; Shetty, Nillan K.; Prasad, Rajendra B.

    2012-01-01

    The correction of skeletal Class III malocclusion with severe mandibular prognathism in an adult individual requires surgical and Othodontic combination therapy. The inter disciplinary approach is the treatment of choice in most of the skeletal malocclusions. A case report of an adult individual with Class III malocclusion, having mandibular excess in sagittal and vertical plane and treated with orthodontics,, bilateral sagittal split osteotomy and Le – Forte I osteotomy for the correction of skeletal, dental and soft tissue discrepancies is herewith presented. The surgical–orthodontic combination therapy has resulted in near–normal skeletal, dental and soft tissue relationship, with marked improvement in the facial esthetics in turn, has helped the patient to improve the self-confidence level. PMID:22557903

  8. Orthodontics-surgical combination therapy for Class III skeletal malocclusion

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    M S Ravi

    2012-01-01

    Full Text Available The correction of skeletal Class III malocclusion with severe mandibular prognathism in an adult individual requires surgical and Othodontic combination therapy. The inter disciplinary approach is the treatment of choice in most of the skeletal malocclusions. A case report of an adult individual with Class III malocclusion, having mandibular excess in sagittal and vertical plane and treated with orthodontics,, bilateral sagittal split osteotomy and Le - Forte I osteotomy for the correction of skeletal, dental and soft tissue discrepancies is herewith presented. The surgical-orthodontic combination therapy has resulted in near-normal skeletal, dental and soft tissue relationship, with marked improvement in the facial esthetics in turn, has helped the patient to improve the self-confidence level.

  9. Cervical vertebrae anomalies in patients with class III skeletal malocclusion

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    Shahin Emami Meibodi

    2011-01-01

    Full Text Available Background and Objective : Studies have documented that deviations in skeletal components such as the cranial base, the mid-facial complex and the mandible may be associated with morphological factors in patients with class III skeletal malocclusion. Furthermore, deviations in head and neck posture may be associated with the class III skeletal malocclusion. The purpose of this study was to compare cervical vertebrae morphology in patients with class III skeletal malocclusion and adults with normal occlusion. Materials and Methods: This case-control study assessed 30 patients with class III skeletal malocclusion (aged 17-30 yrs, with normal vertical growth pattern and ANB<0 were compared with 46 controls (aged 17-30 years, with normal vertical growth pattern, ANB=3+1. Cervical vertebrae anomalies (fusion anomalies and posterior arch deficiency were assessed via evaluation of their lateral cephalograms. The t- test and Fisher′s exact test were used for statistical analysis. Results: In the study group, 73.3% had fusion of the body of the cervical vertebrae, while in the control group only 32.6% showed fusion. The fusion in the control group was between C2 and C3 in all cases; whereas, in the study group, fusion was seen between C2-C3, C3-C¬4 or C4-C¬5. Additionally, cervical column deviations occurred significantly more often in the study group compared to the control group (P<0.001. Conclusion : Class III skeletal malocclusion may be associated with fusion of cervical vertebrae and deviation of the cervical column.

  10. Conservative treatment of Angle Class III malocclusion with anterior crossbite

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    João Hélder Ferreira de Aguiar

    2015-08-01

    Full Text Available Angle Class III malocclusion is characterized by anteroposterior dental discrepancy which might be associated or not with skeletal changes. Class III molar relationship is associated with vertical or lingually tipped mandibular incisors and a usually concave profile. These characteristics seriously affect facial esthetics and most frequently are the reason why patients seek orthodontic treatment. This case was presented to the committee of the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as part of the requisites to become a BBO Diplomate.

  11. Treatment of Class III Malocclusion: Atypical Extraction Protocol

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    Ferreira, Fernando Pedrin Carvalho; de Almeida-Pedrin, Renata Rodrigues; Conti, Ana Claudia de Castro Ferreira; Cardoso, Maurício de Almeida

    2017-01-01

    The treatment of Angle Class III malocclusion is rather challenging, because the patient's growth pattern determines the success of long-term treatment. Early diagnosis and treatment are still highly discussed issues in orthodontic literature. This type of early intervention has been indicated more frequently in order to eliminate primary etiological factors and prevent an already present malocclusion from becoming severe. However, when a patient is diagnosed in adulthood, manipulation of the bone bases becomes extremely limited, as there is no longer any potential for growth. Treatments are restricted to dental compensations when possible or orthognathic surgery. However, owing to the high cost and inherent risk of the surgical procedure, this treatment option is often denied by the patient; in such a case, the orthodontist has little choice but to perform, where possible, compensatory treatments to restore a functional occlusion and improve facial esthetics. This article reports a case of Class III malocclusion in a patient who opted for compensatory treatment with lower molar extraction that allowed for correction of the midline and the overjet. Good facial esthetics and functional normal occlusion were achieved at the end of the treatment. PMID:28265473

  12. Treatment of Class III Malocclusion: Atypical Extraction Protocol

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    Fernando Pedrin Carvalho Ferreira

    2017-01-01

    Full Text Available The treatment of Angle Class III malocclusion is rather challenging, because the patient’s growth pattern determines the success of long-term treatment. Early diagnosis and treatment are still highly discussed issues in orthodontic literature. This type of early intervention has been indicated more frequently in order to eliminate primary etiological factors and prevent an already present malocclusion from becoming severe. However, when a patient is diagnosed in adulthood, manipulation of the bone bases becomes extremely limited, as there is no longer any potential for growth. Treatments are restricted to dental compensations when possible or orthognathic surgery. However, owing to the high cost and inherent risk of the surgical procedure, this treatment option is often denied by the patient; in such a case, the orthodontist has little choice but to perform, where possible, compensatory treatments to restore a functional occlusion and improve facial esthetics. This article reports a case of Class III malocclusion in a patient who opted for compensatory treatment with lower molar extraction that allowed for correction of the midline and the overjet. Good facial esthetics and functional normal occlusion were achieved at the end of the treatment.

  13. Orthodontic-surgical treatment of a severe class III malocclusion

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    Pakpahan Evie Lamtiur

    2013-12-01

    Full Text Available Background: Adult patient with dentofacial deformities usually need surgical orthodontic treatment. Although case of class II dentofacial deformities are more common, the need for treatment and improvement in term of facial profile is generally greater in class III patients. When a skeletal Class III malocclusion is diagnosed, orthognathic surgery is always considered if the orthodontist and patient desire complete correction of the skeletal discrepancy. Purpose: The purpose of this article were to reported a case of severe class III malocclusion and to showed the positive effect of orthognatic surgical treatment on the patient’s profile. Case: This case report describes the surgical-orthodontic treatment of a 20 year old male patient with class III dentofacial deformity. Case managements: To allow adequate surgical movement, both maxillary first premolars were extracted, and the maxillary incisors were retracted. No extractions were performed in the mandibular arch. Surgery included a Le Fort I osteotomy with 8 mm advancement, a bilateral sagittal split osteotomy with the mandibula was set back 13 mm at right side and 11 mm at left side for the correction of dental midline and chin deviation. The genioplasty treatment also was done. Conclusion: Surgical-orthodontic treatment could be chosen as a treatment option for achieving an acceptable occlusion and a good esthetic result in a patient with a Class III dentofacial deformity. Nevertheless, it should be performed by a multidisciplinary team to ensure a satisfactory outcome.Latar belakang: Pasien dewasa dengan deformitas dentofacial biasanya ditangani dengan perawatan bedah orthodonti. Walaupun kasus deformitas dentofacial klas II lebih sering dijumpai, namun kebutuhan perawatan dan keinginan untuk memperbaiki profil muka lebih tinggi pada pasien dengan kasus klas III. Untuk koreksi kelainan skeletal secara menyeluruh pada maloklusi skeletal klas III maka dibutuhkan perawatan bedah ortodonti

  14. Oral Impacts on Quality of Life in Adult Patients with Class I, II and III Malocclusion

    OpenAIRE

    Javed, Omair; Bernabé, Eduardo

    2016-01-01

    PURPOSE: To compare the social impact of malocclusion on quality of life between adult patients with Angle Class I, II and III malocclusion.MATERIALS AND METHODS: A total of 222 adult patients (139, 42 and 41 with Angle Class I, II and III malocclusion, respectively) were recruited voluntarily from those attending the Orthodontic Clinic of Khyber College of Dentistry in Pesh awar, Pakistan. Participants were asked to complete the Urdu version of the short form of the Oral Health Impact Profil...

  15. Early treatment of Class III malocclusion by RME and modified Tandem appliance.

    Science.gov (United States)

    Ansar, Juhi; Maheshwari, Sandhya; Verma, Sanjeev Kumar; Singh, Raj Kumar

    2015-01-01

    Patients with a skeletal Class III malocclusion and maxillary deficiency can be treated successfully using a combined protraction facemask and alternate rapid maxillary expansions and contractions (Alt-RAMEC). However, due to poor patient compliance during facemask therapy there has been growing interest in intraoral appliances for correcting Class III malocclusion. The tandem traction bow appliance (TTBA) is an intraoral appliance which has been used successfully for the treatment of growing Class III patients. This case report describes the management of a 10-year-old boy with a Class III malocclusion and maxillary deficiency treated with modified TTBA appliance.

  16. Management of pseudo Class III malocclusion--synergistic approach with fixed and functional appliance.

    Science.gov (United States)

    Kumar, Amit; Tandon, Pradeep; Singh, Gyan P

    2013-01-01

    Class III malocclusion has been divided into two subtypes: skeletal and pseudo-Class III. A pseudo Class III malocclusion should be treated as early as possible to reduce the functional shift of the mandible and increase maxillary arch length. A case of pseudo-Class III malocclusion was presented here. A 11-year-old boy came with an anterior cross bite, the treatment was done with Fixed appliance (Roth prescription) and Reverse Twin block therapy. This case demonstrated that an anterior cross bite was corrected after 10 months of treatment.

  17. Surgical treatment of dental and skeletal Class III malocclusion.

    Science.gov (United States)

    Brunharo, Ione Helena Vieira Portella

    2013-01-01

    Orthodontic preparation for surgical treatment of skeletal Class III malocclusion involves joint planning with an oral and maxillofacial surgeon to address the functional and esthetic needs of the patient. In order to allow surgical manipulation of the jaws in the preoperative phase, the need to achieve a negative overjet through incisor decompensation often leads the orthodontist to extract the upper first premolars. This report illustrates an orthodontic preparation case where due to specific factors inherent in the patient's psychological makeup retroclination of the upper incisors and proclination of the mandibular incisors was achieved without removing any teeth. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO) in partial fulfillment of the requirements for obtaining the BBO Diploma.

  18. Treatment of pseudo Class III malocclusion by modified Hawleys appliance with inverted labial bow

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    K S Negi

    2011-01-01

    Full Text Available Pseudo Class III malocclusion is characterized by an anterior crossbite with functional forward mandibular displacement. Various appliances have been devised for early treatment of a pseudo Class III. The aim of this article is to highlight the method of construction and use a simple removable appliance termed as "Modified Hawleys appliance with inverted labial bow" to treat psuedo class III malocclusion in the mixed dentition period. It also emphasizes the importance of differentiating between true Class III and pseudo Class III. This appliance in this type of malocclusion enabled the correction of a dental malocclusion in a few months and therapeutic stability of a mesially positioned mandible encouraging favorable skeletal growth.

  19. Combination of expansion and orthognathic surgery in a severe hyperdivergent skeletal Class III malocclusion

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    Anadha Gujar

    2016-01-01

    Full Text Available Class III malocclusions with a severe hyperdivergent growth pattern are very complex to plan and treat. This case report describes the treatment of an adult with a skeletal Class III malocclusion with a midface deficiency, severe bilateral posterior crossbite, and a severe hyperdivergent growth pattern by a combination of a bonded rapid maxillary expansion appliance and surgical procedure of Le Fort I osteotomy for maxillary advancement.

  20. Treatment Options for Class III Malocclusion in Growing Patients with Emphasis on Maxillary Protraction.

    Science.gov (United States)

    Azamian, Zeinab; Shirban, Farinaz

    2016-01-01

    It is very difficult to diagnose and treat Class III malocclusion. This type of malocclusion involves a number of cranial base and maxillary and mandibular skeletal and dental compensation components. In Class III malocclusion originating from mandibular prognathism, orthodontic treatment in growing patients is not a good choice and in most cases orthognathic surgery is recommended after the end of growth. Approximately 30-40% of Class III patients exhibit some degree of maxillary deficiency; therefore, devices can be used for maxillary protraction for orthodontic treatment in early mixed dentition. In cases in which dental components are primarily responsible for Class III malocclusion, early therapeutic intervention is recommended. An electronic search was conducted using the Medline database (Entrez PubMed), the Cochrane Collaboration Oral Health Group Database of Clinical Trials, Science Direct, and Scopus. In this review article, we described the treatment options for Class III malocclusion in growing patient with an emphasis on maxillary protraction. It seems that the most important factor for treatment of Class III malocclusion in growing patient is case selection.

  1. Orthodontic treatment of an asymmetric case with Class III malocclusion, crowding, and an impacted canine

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    Juan Carlos Pérez Varela

    2016-01-01

    Full Text Available Introduction: Class III malocclusions are considered one of the most difficult problems to treat. For us, the complexity of these cases is the esthetics of the face and smile because the treatment of these malocclusions without surgery produces a more retrusive face. Diagnosis and Etiology: We present a case of an adult male patient with skeletal Class III malocclusion with several crowding and impacted canines, who was treated with extractions of the upper canines and lower premolars. Conclusions: The result is acceptable in terms of occlusion function, esthetic of the smile, and facial esthetics.

  2. Orthosurgical management of an asymmetric case with class III malocclusion and transversal problem in the maxilla

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    Juan Carlos Perez Varela

    2016-01-01

    Full Text Available Class III malocclusions are considered to be one of the most difficult problems to treat. For us, the complex of these cases is the esthetic of the face and the smile because the treatment of the malocclusions without surgery produces a more retrusive face. We present a case report of an adult male patient with skeletal Class III malocclusion with compression in the maxilla and mandibular asymmetry, who has treated the orthosurgical approach. The result is acceptable in terms of occlusion-function, esthetic of the smile, and facial esthetics.

  3. Stability of bimaxillary surgery on Class III malocclusion treatment

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    Fernando Antonio Gonçalves

    2012-12-01

    Full Text Available OBJECTIVE: To evaluate the stability of bimaxillary surgery in patients with skeletal malocclusion, with the use of rigid internal fixation. METHODS: Lateral cephalograms from 20 patients, 11 males and 9 females, mean age of 26 years and 1 month, were evaluated before surgery, immediately post-operative and at least 6 months after surgery. Nineteen cephalometric measurements were evaluated, and the results were statistically analyzed by means of the Student's t test and the Kruskal-Wallis test. RESULTS: The Le Fort I maxillary advancement surgery showed almost no relapse. There was lack of stability of mandibular setback, with relapse of 37.33% on point B, due to counterclockwise rotation of the mandible between post-operative periods, occurred by better intercuspation after surgery and muscle adaptation. The results showed the same tendencies for both genders. CONCLUSION: It was concluded that on the bimaxillary surgery treatment of Class III malocclusion, the maxillary surgery was very stable, but the mandibular setback recurred. No statistical differences were found in surgical stability between genders.OBJETIVO: avaliar a estabilidade da cirurgia combinada de maxila e mandíbula em pacientes com má oclusão esquelética de Classe III com a utilização de fixação interna rígida. MÉTODOS: utilizaram-se telerradiografias obtidas em norma lateral de 20 pacientes, sendo 11 do sexo masculino e 9 do feminino, com média de idade de 26 anos e 1 mês, avaliados antes da cirurgia, no pós-operatório imediato e no mínimo 6 meses após a cirurgia. Avaliaram-se dezenove grandezas cefalométricas e os resultados foram analisados estatisticamente por meio do teste t de Student e da análise de Kruskal-Wallis. RESULTADOS: a cirurgia de avanço maxilar praticamente não apresentou recidiva. Ocorreu perda de estabilidade do recuo mandibular, com recidiva de 37,33% no ponto B, devido ao giro anti-horário da mandíbula entre os períodos p

  4. Surgical treatment of dental and skeletal Class III malocclusion

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    Ione Helena Vieira Portella Brunharo

    2013-02-01

    Full Text Available Orthodontic preparation for surgical treatment of skeletal Class III malocclusion involves joint planning with an oral and maxillofacial surgeon to address the functional and esthetic needs of the patient. In order to allow surgical manipulation of the jaws in the preoperative phase, the need to achieve a negative overjet through incisor decompensation often leads the orthodontist to extract the upper first premolars. This report illustrates an orthodontic preparation case where due to specific factors inherent in the patient's psychological makeup retroclination of the upper incisors and proclination of the mandibular incisors was achieved without removing any teeth. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO in partial fulfillment of the requirements for obtaining the BBO Diploma.O preparo ortodôntico para tratamento cirúrgico do padrão esquelético de Classe III envolve o planejamento em conjunto com o cirurgião bucomaxilofacial, com o objetivo de solucionar as necessidades funcionais e estéticas do paciente. A fim de permitir a manipulação cirúrgica das bases ósseas, a obtenção de overjet negativo por meio da descompensação dos incisivos, na fase pré-cirúrgica, leva, com frequência, o ortodontista a optar pela exodontia dos primeiros pré-molares superiores. O presente relato ilustra um caso de preparo ortodôntico no qual, devido a fatores específicos inerentes à questão psicológica da paciente, a retroinclinação dos incisivos superiores e vestibularização dos incisivos inferiores foi realizada sem a remoção de elementos dentários. Esse caso foi apresentado à diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.

  5. A radiographic study of temporomandibular joints in skeletal class III malocclusion

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Sung Eun; Kim, Kae Duk [Chosun University College of Medicine, Kwangju (Korea, Republic of)

    2003-06-15

    To investigate the differences between the position of the mandibular condyles in temporomandibular joints of patients presenting with normal occlusion and skeletal class III malocclusion. Forty-two subjects with normal occlusion and thirty-seven subjects exhibiting skeletal class III malocclusion prior to orthodontic treatment were included in the study. Transcranial radiographs of each subject were taken at centric occlusion and 1 inch mouth opening. The positional relationship between the mandibular condyles with articular fossae and articular eminences at two positional states were evaluated and analyzed statistically. The mandibular condyles of the skeletal class III malocclusion group were found to be located more anteriorly from the center of the articular fossae compared to the normal occlusion group in centric occlusion. The mandibular condyles of the skeletal Class III malocclusion group were located more superiorly from the middle of articular height than those of the normal occlusion group in centric occlusion. However, these differences were not statistically significant. At 1 inch mouth opening, the mandibular condyles of the skeletal class III malocclusion group were placed more posteriorly from the articular eminences than those of the normal occlusion group. The mean angle of the articular eminence posterior slope were 56.51 .deg. {+-} 6.29 .deg. in the normal occlusion group and 60.37 .deg. {+-} 6.26 .deg. in the skeletal Class III malocclusion group. The mandibular condyles of the skeletal Class III malocclusion group were placed more anteriorly at centric occlusion and more posteriorly at 1 inch mouth opening when compared with those of the normal occlusion group.

  6. Early correction of class III malocclusion with rapid maxillary expansion and face mask therapy.

    Science.gov (United States)

    Karthi, Muthukumar; Anbuselvan, Gobichettipalayam Jagatheeswaran; Kumar, Bhandari Pawan

    2013-07-01

    A case report is presented of a class III malocclusion with a class III skeletal pattern and maxillary retrusion. Patient, a 10-year-old boy was treated with an orthopedic face mask in conjunction with rapid maxillary expansion and standard pre-adjusted edgewise appliance. Treatment was completed after 3 years and proved to be stable following the active treatment.

  7. Condition-Specific Impacts on Quality of Life Attributed to Malocclusion by Adolescents with Normal Occlusion and Class I, II and III Malocclusion

    OpenAIRE

    Bernabe, E.; Sheiham, A.; Oliveira, C. M.

    2008-01-01

    Objective: To compare the prevalence, intensity, and extent of condition-specific oral impacts on quality of life attributed to malocclusion by Brazilian adolescents with normal occlusion and those with Angle Class I, II, and III malocclusion.Materials and Methods: Four groups of 55 adolescents were configured such that each group represented normal occlusion, as well as Angle Class I, II, and III malocclusion. No radiographs were taken. Adolescents aged 15 to 16 years were selected from thos...

  8. Reverse twin block for interceptive management of developing class III malocclusion

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    Meenu Mittal

    2017-01-01

    Full Text Available Early correction of developing class III malocclusions remains a complex challenge. Treatment approaches for these young patients have been directed at growth modification. Encouraging outcomes have been reported with the use of Class III functional appliances including reverse twin block (RTB appliance. The present paper tries to provide an insight into RTB appliance used for successful interceptive management of developing class III malocclusion in two children. RTBs were fabricated with bite registered in the position of maximum possible retrusion of mandible with interincisal clearance of 2 mm and vertical clearance of 5 mm in the buccal segments. Anterior crossbite was corrected, and there was a marked improvement in facial appearance of the children. RTB can be a viable and effective functional appliance treatment modality for early management of developing class III malocclusion.

  9. Reverse twin block for interceptive management of developing class III malocclusion.

    Science.gov (United States)

    Mittal, Meenu; Singh, Harpreet; Kumar, Ashok; Sharma, Poonam

    2017-01-01

    Early correction of developing class III malocclusions remains a complex challenge. Treatment approaches for these young patients have been directed at growth modification. Encouraging outcomes have been reported with the use of Class III functional appliances including reverse twin block (RTB) appliance. The present paper tries to provide an insight into RTB appliance used for successful interceptive management of developing class III malocclusion in two children. RTBs were fabricated with bite registered in the position of maximum possible retrusion of mandible with interincisal clearance of 2 mm and vertical clearance of 5 mm in the buccal segments. Anterior crossbite was corrected, and there was a marked improvement in facial appearance of the children. RTB can be a viable and effective functional appliance treatment modality for early management of developing class III malocclusion.

  10. Early treatment of Class III malocclusion with a tandem traction bow appliance

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    Sneha Basaveshwar Valgadde

    2016-01-01

    Full Text Available Since Class III malocclusion is progressive in nature, the facial growth of Class III malocclusion worsens with age. Class III malocclusion is associated with a deviation in the sagittal relationship of the maxilla and the mandible, characterized by a deficient maxilla, retrognathic mandible, or a combination of both. The early orthopedic treatment of Class III malocclusions, at the end of primary dentition or the beginning of mixed dentition, prior to growth spurt, allows the accomplishment of successful results, providing facial balance, modifying the maxillofacial growth and development, and in many instances, preventing a future surgical treatment by increasing the stability. Many treatment approaches can be found in the literature regarding orthopedic and orthodontic treatment of Class III malocclusion, including intra- and extra-oral appliances. The major problem with extraoral anchorage has been of patient compliance due to its physical appearance. The case report presents an intraoral modified tandem appliance for maxillary protraction that has been used clinically to achieve successful results without relying much on patient co-operation.

  11. A missense mutation in DUSP6 is associated with Class III malocclusion.

    Science.gov (United States)

    Nikopensius, T; Saag, M; Jagomägi, T; Annilo, T; Kals, M; Kivistik, P A; Milani, L; Metspalu, A

    2013-10-01

    Class III malocclusion is a common dentofacial phenotype with a variable prevalence according to ethnic background. The etiology of Class III malocclusion has been attributed mainly to interactions between susceptibility genes and environmental factors during the morphogenesis of the mandible and maxilla. Class III malocclusion shows familial recurrence, and family-based studies support a predominance of an autosomal-dominant mode of inheritance. We performed whole-exome sequencing on five siblings from an Estonian family affected by Class III malocclusion. We identified a rare heterozygous missense mutation, c.545C>T (p.Ser182Phe), in the DUSP6 gene, a likely causal variant. This variant co-segregated with the disease following an autosomal-dominant mode of inheritance with incomplete penetrance. Transcriptional activation of DUSP6 has been presumed to be regulated by FGF/FGFR and MAPK/ERK signaling during fundamental processes at early stages of skeletal development. Several candidate genes within a linkage region on chromosome 12q22-q23--harboring DUSP6--are implicated in the regulation of maxillary or mandibular growth. The current study reinforces that the 12q22-q23 region is biologically relevant to craniofacial development and may be genetically linked to the Class III malocclusion.

  12. Orthognathic Surgery for the Correction of Severe Skeletal Class III Malocclusion.

    Science.gov (United States)

    Kafle, D; Upadhayaya, C; Chaurasia, N; Agarwal, A

    2016-01-01

    Skeletal Malocclusions results from the abnormal position of maxilla and mandible in relation with cranial base. These types of malocclusion are commonly treated by orthodontic teeth movement known as camouflage orthodontics. However severe skeletal malocclusions cannot be treated by orthodontics alone. Such cases need surgical intervention to align the position of the jaw along with orthodontic correction. This procedure is commonly known as Orthognathic Surgery. Orthognathic Surgery dates back to early eighteenth century but became popular on mid twentieth century. Though the prevalence of skeletal malocclusion is more than 1% the treatment facility was not available in Nepal till 2012. Here we present a case of Skeletal Class III malocclusion treated at Dhulikhel Hospital, Kathmandu University Hospital. For this case, double jaw surgery was performed by le-Fort I osteotomy and Bilateral Sagital Split Osteotomy. Orthognathic surgery has been routinely performed at this centre since then.

  13. Inheritance of craniofacial features in Colombian families with class III malocclusion

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    L Otero

    2010-02-01

    Full Text Available L Otero, L Quintero, D Champsaur, E SimancaPontificia Universidad Javeriana, Bogotá, ColombiaIntroduction: The inheritance of class III malocclusion has been well documented, but the inheritance of craniofacial structures in Colombian families with this malocclusion has been not yet reported.Patients and methods: The study sample of 25 families comprised 186 untreated orthodontic individuals from 8 to 60 years old. Pedigrees were drawn using Cyrillic software. Complete family histories for each proband were ascertained and the affection status of relatives was confirmed by lateral cephalograms and facial and dental photographs. Analysis of variance and odds ratio test for each parameter was performed to estimate inheritance from parents to offspring and to determine similar phenotypic features in relatives.Results: The analysis of the pedigrees suggests autosomal dominant inheritance. The craniofacial characteristics that showed more resemblance between parents and offspring were middle facial height, shorter anterior cranial base and mandibular prognathism. In contrast the protrusion of upper lip and maxillary retrusion were the phenotypic features that contributed to class III in the majority of families.Conclusion: Knowledge of the inheritance of craniofacial phenotypes in class III malocclusion will enable the design of new therapies to treat this malocclusion.Keywords: inheritance, craniofacial, phenotype, class III malocclusion

  14. Management of skeletal Class III malocclusion with face mask therapy and comprehensive orthodontic treatment.

    Science.gov (United States)

    Muthukumar, Kirthika; Vijaykumar, N M; Sainath, M C

    2016-01-01

    Orthopedic correction of skeletal Class III malocclusion in a growing patient is crucial as it can circumvent future surgical procedures. Further, as surgery is done only at a later stage, early treatment helps to avoid the detrimental effects produced by the facial disfigurement on the patient's social life. This case report describes the treatment of a child aged 9 years 6 months who had a skeletal Class III malocclusion. The treatment plan involved the use of a reverse pull headgear (facemask) and multibracket appliance therapy resulting in successful correction of the malocclusion. The treatment results were highly satisfactory resulting in improved facial esthetics, a skeletal Class I with a Dental Class I molar and canine relationship, an ideal overjet and overbite. Thus, dentoalveolar camouflage, if done in properly selected cases, alleviates the need for surgical intervention. The patient is being monitored until the end of growth to ensure the stability of treatment results.

  15. Management of skeletal Class III malocclusion with face mask therapy and comprehensive orthodontic treatment

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    Kirthika Muthukumar

    2016-01-01

    Full Text Available Orthopedic correction of skeletal Class III malocclusion in a growing patient is crucial as it can circumvent future surgical procedures. Further, as surgery is done only at a later stage, early treatment helps to avoid the detrimental effects produced by the facial disfigurement on the patient's social life. This case report describes the treatment of a child aged 9 years 6 months who had a skeletal Class III malocclusion. The treatment plan involved the use of a reverse pull headgear (facemask and multibracket appliance therapy resulting in successful correction of the malocclusion. The treatment results were highly satisfactory resulting in improved facial esthetics, a skeletal Class I with a Dental Class I molar and canine relationship, an ideal overjet and overbite. Thus, dentoalveolar camouflage, if done in properly selected cases, alleviates the need for surgical intervention. The patient is being monitored until the end of growth to ensure the stability of treatment results.

  16. Severe Angle Class III skeletal malocclusion associated to mandibular prognathism: orthodontic-surgical treatment

    Science.gov (United States)

    Souki, Marcelo Quiroga

    2016-01-01

    ABSTRACT The present case report describes the orthodontic treatment of a young adult patient (18y / 1m), Class III skeletal malocclusion, with mandibular prognathism and significant dental compensation. The canine relation was Class III, incisors with tendency to crossbite and open bite, moderate inferior crowding, and concave profile. Skeletal correction of malocclusion, facial profile harmony with satisfactory labial relationship, correction of tooth compensation and normal occlusal relationship were obtained with orthodontic treatment associated to orthognathic surgery. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO), as part of the requirements to become a BBO diplomate. PMID:28125146

  17. Phenotypic Diversity in Caucasian Adults with Moderate to Severe Class III Malocclusion

    Science.gov (United States)

    Moreno Uribe, Lina M.; Vela, Kaci C.; Kummet, Colleen; Dawson, Deborah V.; Southard, Thomas E.

    2014-01-01

    INTRODUCTION Class III malocclusion is characterized by a composite of dento-skeletal patterns that lead to the forward positioning of the mandibular teeth in relation to the maxillary teeth and a concave profile. Environmental and genetic factors are associated with this condition, which affects 1% of the US population and imposes significant esthetic and functional burdens on affected individuals. The purpose of this study was to capture the phenotypic variation present in a large sample of white adults with Class III malocclusion by using multivariate reduction methods. METHODS Sixty-three lateral cephalometric variables were measured from pre-treatment records of 292 Class II Caucasian adults (126 males, 166 females; ages 16-57 years). Principal component analysis and cluster analysis were used to capture the phenotypic variation and identify the most homogeneous groups of individuals to reduce genetic heterogeneity. RESULTS Principal component analysis resulted in 6 principal components that accounted for 81.2% of the variation. The first three components represented variations in mandibular horizontal and vertical position, maxillary horizontal position, and mandibular incisor angulation, respectively. The cluster model identified 5 distinct subphenotypes of Class III malocclusion. CONCLUSIONS A spectrum of phenotypic definitions was obtained replicating results of previous studies and supporting the validity of these phenotypic measures in future research of genetic and environmental etiology of Class III malocclusion. PMID:23810043

  18. Self-esteem in adolescents with Angle Class I, II and III malocclusion in a Peruvian sample

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    Karla Florián-Vargas

    2016-04-01

    Full Text Available ABSTRACT Objective: To compare self-esteem scores in 12 to 16-year-old adolescents with different Angle malocclusion types in a Peruvian sample. Material and Methods: A cross-sectional study was conducted in a sample of 276 adolescents (159, 52 and 65 with Angle Class I, II and III malocclusions, respectively from Trujillo, Peru. Participants were asked to complete the Rosenberg Self-Esteem Scale (RSES and were also clinically examined, so as to have Angle malocclusion classification determined. Analysis of covariance (ANCOVA was used to compare RSES scores among adolescents with Class I, II and III malocclusions, with participants' demographic factors being controlled. Results: Mean RSES scores for adolescents with Class I, II and III malocclusions were 20.47 ± 3.96, 21.96 ± 3.27 and 21.26 ± 4.81, respectively. The ANCOVA test showed that adolescents with Class II malocclusion had a significantly higher RSES score than those with Class I malocclusion, but there were no differences between other malocclusion groups. Supplemental analysis suggested that only those with Class II, Division 2 malocclusion might have greater self-esteem when compared to adolescents with Class I malocclusion. Conclusion: This study shows that, in general, self-esteem did not vary according to adolescents' malocclusion in the sample studied. Surprisingly, only adolescents with Class II malocclusion, particularly Class II, Division 2, reported better self-esteem than those with Class I malocclusion. A more detailed analysis assessing the impact of anterior occlusal features should be conducted.

  19. A new modified tandem appliance for management of developing Class III malocclusion

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    Ram Sukh

    2013-01-01

    Full Text Available Most developing Class III patients display a retruded maxilla. Early intervention in mixed dentition is associated with better patient compliance and possibly a better orthopedic response, which can produce favorable results. The aim of this article is to present the fabrication of the new modified tandem appliance and its use in management of developing Class III malocclusion. The therapeutic results of a new modified tandem appliance are presented in an 8 year-old male patient with anterior cross bite and retrognathic maxilla at the mixed dentition stage. Anterior cross bite was corrected in 3 months and the positive overjet of 4 mm after continued use of the appliance for 1 year. There was a significant improvement in profile of the patient. The use of this appliance in this type of malocclusion enabled the correction of malocclusion in a few months and encouraging favorable skeletal growth in the future.

  20. A new modified tandem appliance for management of developing Class III malocclusion.

    Science.gov (United States)

    Sukh, Ram; Singh, Gyan P; Tandon, Pradeep

    2013-10-01

    Most developing Class III patients display a retruded maxilla. Early intervention in mixed dentition is associated with better patient compliance and possibly a better orthopedic response, which can produce favorable results. The aim of this article is to present the fabrication of the new modified tandem appliance and its use in management of developing Class III malocclusion. The therapeutic results of a new modified tandem appliance are presented in an 8 year-old male patient with anterior cross bite and retrognathic maxilla at the mixed dentition stage. Anterior cross bite was corrected in 3 months and the positive overjet of 4 mm after continued use of the appliance for 1 year. There was a significant improvement in profile of the patient. The use of this appliance in this type of malocclusion enabled the correction of malocclusion in a few months and encouraging favorable skeletal growth in the future.

  1. Prediction of the outcome of orthodontic treatment of Class III malocclusions--a systematic review

    NARCIS (Netherlands)

    Fudalej, P.S.; Dragan, M.; Wedrychowska-Szulc, B.

    2011-01-01

    The purpose of this study was to systematically review the orthodontic literature to assess the effectiveness of a prediction of outcome of orthodontic treatment in subjects with a Class III malocclusion. A structured search of electronic databases, as well as hand searching, retrieved 232 publicati

  2. Orthodontic-surgical treatment of the skeletal class III malocclusion: A case report

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    Stojanović Ljiljana S.

    2013-01-01

    Full Text Available Background. Class III malocclusions are considered to be ones of the most difficult problems to treat. Their causes are multifactorial and include genetic and/or environmental factors. Class III malocclusions are generally classified into 2 categories: skeletal and dental. The diagnosis is important due to the different treatment approaches. Generally a dental class III can be treated with orthodontics alone, while a true skeletal class III requires a combination of orthodontics and surgery. Case report. We presented a female patient with skeletal Class III malocclusion. The treatment was complete with positive overbite and acceptable occlusion using a combination of fixed orthodontic appliance treatment as well as the surgical operation. The patient was happy with her new appearance and function. Conclusion. Class III discrepancy should be diagnosed and classified according to its etiology and treated with appropriate surgery, including, if necessary, not only mandibular, but also maxillary surgery, in order to achieve a normal facial appearance. In any case, as the field of orthodontics continues to develop technologically and philosophically, we can expect that advances in diagnosis and treatment planning are imminent and inevitable.

  3. Non-surgical Management of Skeletal Class III Malocclusion with Bilateral Posterior Crossbite: A Case Report

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    Nayan, Kamal

    2016-01-01

    A 16-year-old female patient with skeletal Class III malocclusion and bilateral posterior cross bite complaining of difficulty in chewing was treated orthodontically without surgery (camouflage treatment). The treatment comprised of fixed orthodontic treatment with MBT prescription (0.022˝×0.028˝ slot) using quad helix appliance for bilateral expansion of maxillary arch and Class III elastics for occlusal correction. Post-treatment records showed normal overbite and overjet with acceptable occlusion. So with this treatment strategy of expanding the maxillary arch using a quad helix appliance and use of Class III elastics, we achieved a good result with optimal occlusion. PMID:28209011

  4. Non-surgical Management of Skeletal Class III Malocclusion with Bilateral Posterior Crossbite: A Case Report.

    Science.gov (United States)

    Kumari, Lalima; Nayan, Kamal

    2016-12-01

    A 16-year-old female patient with skeletal Class III malocclusion and bilateral posterior cross bite complaining of difficulty in chewing was treated orthodontically without surgery (camouflage treatment). The treatment comprised of fixed orthodontic treatment with MBT prescription (0.022˝×0.028˝ slot) using quad helix appliance for bilateral expansion of maxillary arch and Class III elastics for occlusal correction. Post-treatment records showed normal overbite and overjet with acceptable occlusion. So with this treatment strategy of expanding the maxillary arch using a quad helix appliance and use of Class III elastics, we achieved a good result with optimal occlusion.

  5. Early treatment of Class III malocclusion: 10-year clinical follow-up

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    Marcio Rodrigues de Almeida

    2011-08-01

    Full Text Available Angle Class III malocclusion has been a challenge for researchers concerning diagnosis, prognosis and treatment. It has a prevalence of 5% in the Brazilian population, and may have a genetic or environmental etiology. This malocclusion can be classified as dentoalveolar, skeletal or functional, which will determine the prognosis. Considering these topics, the aim of this study was to describe and discuss a clinical case with functional Class III malocclusion treated by a two-stage approach (interceptive and corrective, with a long-term follow-up. In this case, the patient was treated with a chincup and an Eschler arch, used simultaneously during 14 months, followed by corrective orthodontics. It should be noticed that, in this case, initial diagnosis at the centric relation allowed visualizing the anterior teeth in an edge-to-edge relationship, thereby favoring the prognosis. After completion of the treatment, the patient was followed for a 10-year period, and stability was observed. The clinical treatment results showed that it is possible to achieve favorable outcomes with early management in functional Class III malocclusion patients.

  6. Asymmetric class III malocclusion: association with cranial base deformation and occult torticollis.

    Science.gov (United States)

    Yuan, Joyce T; Teng, Edward; Heller, Justin B; Kawamoto, Henry K; Bradley, James P

    2012-09-01

    The etiology of Angle class III malocclusion with facial asymmetry has not been fully elucidated. To investigate the etiology, patients with asymmetric prognathism (n = 30) from a single institution were assessed for previously undiagnosed torticollis and cranial base asymmetry. Presence of torticollis was determined by measuring restricted head movement when turning the head against a wall and cranial base tilt with upward gaze. Cranial base asymmetry was evaluated by preoperative three-dimensional computed tomography scans. Thirty-one percent of patients with prognathism presented with concurrent facial asymmetry. In patients with asymmetric prognathism, cranial base tilt was present on upward gaze in all patients; mean angle between head and wall was 31 degrees greater than that in control patients, and a 22% to 36% difference in the angle was present when comparing one side with the other. Based on these findings, all patients with asymmetric prognathism were found to be affected by torticollis. By computed tomography scan, 85% of these torticollis patients showed slight anteromedial displacement of the glenoid fossa ipsilateral to torticollis, and 73% demonstrated temporal fossa shift of 4 mm or greater. The current study demonstrates a strong association between asymmetric class III malocclusion, torticollis, and cranial base asymmetry. We conclude that undiagnosed torticollis is a likely etiology for otherwise idiopathic cranial base asymmetry and that cranial base asymmetry in turn causes facial asymmetry and malocclusion. This study highlights the importance of evaluating cranial base asymmetry and torticollis in patients with class III malocclusion to allow for earlier treatment and improved outcomes.

  7. Management of skeletal Class III malocclusion with reverse pull headgear in a growing individual

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    Ambreen Afzal

    2016-01-01

    Full Text Available Skeletal Class III malocclusion is considered to be one of the most difficult orthodontic problems to treat. This malocclusion is associated with the retrognathic maxilla or prognathic mandible or sometimes a combination of both. The treatment of such cases requires an integrated approach and a comprehensive treatment plan including growth modification, dental camouflage, or orthognathic surgery. In a growing patient, orthopedic correction of skeletal Class III malocclusion with the help of a reverse pull headgear is crucial as it can reduce the chances of further surgical treatment to correct the skeletal discrepancy. This case report describes the management of skeletal Class III malocclusion in a 12-year-old female child with a retrognathic maxilla. The patient did not have any other genetic abnormality or significant known comorbidity. The treatment plan involved fixed orthodontic appliance therapy in combination with a reverse pull headgear for an orthopedic effect. This treatment was continued for 3 years, and well-aligned dental arches with a positive over jet were achieved at the conclusion of treatment. Using facemask therapy in conjunction with fixed orthodontic appliances has been a successful treatment option in growing children. Treatment should be carried out as early as possible to correct the skeletal discrepancy nonsurgically and achieve better results.

  8. Early orthopedic correction of skeletal Class III malocclusion using combined reverse twin block and face mask therapy

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    Vinay Kumar Chugh

    2015-01-01

    Full Text Available A 6-year 8-month-old girl presented with a moderate Class III malocclusion characterized by mid-face deficiency and an anterior cross bite. In the first phase, the patient was treated with combination of reverse twin block and facemask therapy. In phase two, fixed appliances were placed in the permanent dentition. The post treatment results were good and a favorable growth tendency could be observed. The correction of the Class III malocclusion occurred by a combination of skeletal and dental improvements. This report shows successful correction of skeletal Class III malocclusion in the early transitional dentition using combination therapy.

  9. Early orthopedic correction of skeletal Class III malocclusion using combined reverse twin block and face mask therapy.

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    Chugh, Vinay Kumar; Tandon, Pradeep; Prasad, Veerendra; Chugh, Ankita

    2015-01-01

    A 6-year 8-month-old girl presented with a moderate Class III malocclusion characterized by mid-face deficiency and an anterior cross bite. In the first phase, the patient was treated with combination of reverse twin block and facemask therapy. In phase two, fixed appliances were placed in the permanent dentition. The post treatment results were good and a favorable growth tendency could be observed. The correction of the Class III malocclusion occurred by a combination of skeletal and dental improvements. This report shows successful correction of skeletal Class III malocclusion in the early transitional dentition using combination therapy.

  10. Orthodontic camouflage of skeletal Class III malocclusion with miniplate: a case report

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    Marcel Marchiori Farret

    Full Text Available ABSTRACT Introduction: Skeletal Class III malocclusion is often referred for orthodontic treatment combined with orthognathic surgery. However, with the aid of miniplates, some moderate discrepancies become feasible to be treated without surgery. Objective: To report the case of a 24-year-old man with severe skeletal Angle Class III malocclusion with anterior crossbite and a consequent concave facial profile. Methods: The patient refused to undergo orthognathic surgery; therefore, orthodontic camouflage treatment with the aid of miniplates placed on the mandibular arch was proposed. Results: After 18 months of treatment, a Class I molar and canine relationship was achieved, while anterior crossbite was corrected by retraction of mandibular teeth. The consequent decrease in lower lip fullness and increased exposure of maxillary incisors at smiling resulted in a remarkable improvement of patient's facial profile, in addition to an esthetically pleasing smile, respectively. One year later, follow-up revealed good stability of results.

  11. Orthodontic camouflage of skeletal Class III malocclusion with miniplate: a case report

    Science.gov (United States)

    Farret, Marcel Marchiori; Farret, Milton M. Benitez; Farret, Alessandro Marchiori

    2016-01-01

    ABSTRACT Introduction: Skeletal Class III malocclusion is often referred for orthodontic treatment combined with orthognathic surgery. However, with the aid of miniplates, some moderate discrepancies become feasible to be treated without surgery. Objective: To report the case of a 24-year-old man with severe skeletal Angle Class III malocclusion with anterior crossbite and a consequent concave facial profile. Methods: The patient refused to undergo orthognathic surgery; therefore, orthodontic camouflage treatment with the aid of miniplates placed on the mandibular arch was proposed. Results: After 18 months of treatment, a Class I molar and canine relationship was achieved, while anterior crossbite was corrected by retraction of mandibular teeth. The consequent decrease in lower lip fullness and increased exposure of maxillary incisors at smiling resulted in a remarkable improvement of patient's facial profile, in addition to an esthetically pleasing smile, respectively. One year later, follow-up revealed good stability of results. PMID:27653269

  12. The Effect of Chin-cup Therapy in Class III Malocclusion: A Systematic Review

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    Mousoulea, Sophia; Tsolakis, Ioannis; Ferdianakis, Efstratios; Tsolakis, Apostolos I.

    2016-01-01

    Background: The treatment of Class III malocclusion has been challenging for orthodontists. Among a plethora of treatment modalities, the chin-cup is considered a traditional appliance for early orthopedic intervention. Objective: The present study aims to investigate the current scientific evidence regarding the effectiveness of chin-cup therapy in Class III malocclusion of prognathic growing patients. Method: A systematic review of the literature was conducted using PubMed/Medline and the Cochrane Central Register of Controlled Trials from January 1954 to October 2015. Articles were selected based on established inclusion/ exclusion criteria. Results: The search strategy resulted in 3285 articles.14 studies were selected for the final analysis. They were all CCTs, 13 of retrospective and 1 of prospective design. Methodological quality was evaluated by a risk of bias assessment, as suggested by the Cochrane Risk of Bias Assessment Tool for Non-Randomized Studies on Interventions. The reported evidence presented favorable short-term outcomes both in hard and soft tissues improving the Class III profile, as well as desirable dento-alveolar changes, positively affecting the Class III malocclusion. Conclusion: There is considerable agreement between studies that chin-cup therapy can be considered for the short-term treatment of growing patients with Class III malocclusion, as indicated by favorable changes both in the hard and soft tissues. The existence of considerable risk of bias in all selected studies and the unclear long-term effectiveness of chin-cup therapy highlight the need for further investigation to draw reliable conclusions. PMID:28077971

  13. Self-esteem in adolescents with Angle Class I, II and III malocclusion in a Peruvian sample

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    Karla Florián-Vargas; Marcos J. Carruitero Honores; Eduardo Bernabé; Carlos Flores-Mir

    2016-01-01

    OBJECTIVE: To compare self-esteem scores in 12 to 16-year-old adolescents with different Angle malocclusion types in a Peruvian sample.MATERIAL AND METHODS: A cross-sectional study was conducted in a sample of 276 adolescents (159, 52 and 65 with Angle Class I, II and III malocclusions, respectively) from Trujillo, Peru. Participants were asked to complete the Rosenberg Self-Esteem Scale (RSES) and were also clinically examined, so as to have Angle malocclusion classification determined. Anal...

  14. Prevalence of class III malocclusion and crossbite among children and adolescents with craniomandibular dysfunction.

    Science.gov (United States)

    Popovic, Nenad; Drinkuth, Nicole; Toll, Douglas E

    2014-01-01

    Numerous studies have been devoted to the causes of craniomandibular dysfunction (CMD). This investigation addressed the effect of class III malocclusion and crossbite on CMD based on a sample of 115 prepubertal and adolescent patients of both sexes. Although class III malocclusion only accounted for 12.2% of the total sample, thus, being the smallest group, the percentage of crossbite (71.4%) among these patients was disproportionately higher than among the other classes. Of the total sample, the prevalence of crossbite was 30.4%. We compared these findings to a large-scale (n=4727) study by Thilander et al. (2002), who reported a strikingly high percentage of class I patients compared to our findings (72.7% versus 27.8%) and a lower percentage of crossbite cases (8.0% versus 30.4%). In accordance with the "orthodontic risk child" concept by Grabowski et al. (2007) and Stahl et al. (2007), we conclude that class III malocclusion and crossbite are keys in the pathogenesis of CMD.

  15. A roentgenocephalometric study on the condylar displacement in angle's class I and III malocclusion

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    Lee, Jeong Hwa; Park, Chang Seo [Dept. of Oral Radiology, College of Dentistry, Yonsei University, Seoul (Korea, Republic of)

    1986-11-15

    The purpose of this investigation was to know correlation of mean values between centric occlusion and centric relation by the cephalogram in Angle's Class I and III malocclusion subjects. 22 adults with Angle's Class I malocclusion (17 men and 5 women, 21 to 27 years of age) and 14 adult with Angle's class III malocclusion (10 men and 4 women, 21 to 27 years of age) were selected form the dental students in Yonsei University. Each subject was given two lateral cephalometric radiographics and cephalometric analysis was performed. All data form these analyses was recorded and statistically processed with CYBER computer system. The results were obtained as follows: 1. There was a strong positive correlation between centric occlusion and centric relation in all subjects with Angle's Class I and III malocclusion. 2. In Angle's Class I malocclusion, measurements in lower facial height revealed significant difference between centric occlusion and centric relation (p<0.05). 3.When the mandible was movement was 1.27 mm (0.2-2.8 mm) in Angle's Class I malocclusion, 1.70 mm(0.55-4.15 mm) in Angle's Class III malocclusion, and 1.44 mm (0.2- 4.15 mm) in all subjects.

  16. Management of Skeletal Class III Malocclusion with a Combined Approach of Facemask Therapy & Fixed Orthodontic Treatment - A Case Report

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    Shraddha Subhash Shetti

    2013-01-01

    Full Text Available A case report of an adolescent girl with a skeletal Class III malocclusion is presented. The associated clinical features of skeletal Class III are presented and management of such condition is discussed. The need for early identification and intervention of the skeletal Class III malocclusion is universally accepted by dentofacial orthopaedicians. Early intervention is associated with a better orthopedic response. Thus, treatment in the mixed or early permanent dentition can produce favorable results. Overcorrection of skeletal class III is recommended because treated patients grow similar to untreated Class III patients after treatment. Functional orthopaedic treatment rendered at an appropriate age ensures desired results in most cases. The intent of this article is to discuss the non-surgical treatment of a skeletal class III malocclusion along with a rationale of orthodontic management of such patients.

  17. Combined orthognathic surgery and prosthetic treatment for class III skeletal malocclusion

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    Luka Dias Wellar

    2013-01-01

    Full Text Available This clinical report discusses the case of a partially edentulous patient with class III skeletal malocclusion, suffering from poor masticatory function and esthetic appearance caused by severe anteroposterior discrepancy between the dental arches and loss of occlusal vertical dimension. The functional and esthetic rehabilitation was performed with orthognathic surgery followed by prosthetic treatment using an overlay removable partial denture. At the end of the treatment, the patient was successfully rehabilitated, both functionally and esthetically, through reestablishment of the occlusal vertical dimension and correction of the anteroposterior discrepancy between the dental arches. The overlay removable partial denture is a simple and time-efficient alternative in the treatment of partially edentulous patients with class III skeletal malocclusions and small anteroposterior discrepancies between dental arches. Additionally, an esthetic smile and functional rehabilitation of the stomatognathic system was satisfactorily obtained with orthognathic surgery followed by prosthetic treatment.

  18. Correction of class III malocclusion using modified tandem appliance-two case reports

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    J Jeevarathan

    2013-01-01

    Full Text Available Skeletal discrepancies in growing children can have great physical and psychological impact on their appearance. These deformities require orthopedic correction at an appropriate age to avoid future extensive management. Managing a midfacial deficiency or true mandibular prognathism is perhaps the most challenging situation for the clinician. Many orthopedic appliances like chin cup, facemask, and so on have been advocated to correct class III malocclusion. The major problems with these appliances are physical appearance, skin irritation from the anchorage pads and hence, less patient compliance. We present management of class III malocclusion in two children with modified tandem appliance (MTA, which is an intraoral appliance, with no extraoral anchorage, and has better patient compliance and cooperation.

  19. Compensatory treatment of Angle Class III malocclusion with anterior open bite and mandibular asymmetry

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    Marcio Costa Sobral

    2012-06-01

    Full Text Available Class III malocclusion is characterized by anterior posterior dental disharmony, either with or without skeletal discrepancies. Facial esthetics may be compromised to a greater or lesser degree, depending on the magnitude of the discrepancy, and is one of the main factors motivating individuals to seek orthodontic treatment. In adult patients, therapy may be performed by means of dental compensation, in simpler cases, or in more severe situations, by means of association between Orthodontics and Orthognathic Surgery. The present article is a clinical case report of a patient with a vertical facial pattern, Angle Class III malocclusion, with open bite and important facial asymmetry. The patient was treated in a compensatory manner with extractions, using extra-oral appliances on the mandibular arch with high pull, applying the principles of the Tweed-Merrifield technique. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as part of the requisites for becoming a BBO Diplomate.

  20. Early Treatment of Class III Malocclusion: A Boon or a Burden?

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    Begum Khan, Mohammadi; Karra, Arjun

    2014-05-01

    This article presents a case of class III malocclusion, a female patient aged 8 years treated in early stage of its recognition, i.e. treated in early mixed dentition stage, utilizing orthopedic appliance for its correction, utilizing both rapid maxillary expansion and face mask approach. After the skeletal base correction as part of phase of phase I therapy, a retentive plate was given and patient was asked to report every 6 months for review and monitoring of her growth pattern and phase II treatment planning after the eruption of all permanent teeth. How to cite this article: Khan MB, Karra A. Early Treatment of Class III Malocclusion: A Boon or a Burden? Int J Clin Pediatr Dent 2014;7(2):130-136.

  1. Correction of class III malocclusion using modified tandem appliance-two case reports.

    Science.gov (United States)

    Jeevarathan, J; Koora, Kiran; Sudhakar, V; Muthu, M S; Prabhu, Rathna V

    2013-01-01

    Skeletal discrepancies in growing children can have great physical and psychological impact on their appearance. These deformities require orthopedic correction at an appropriate age to avoid future extensive management. Managing a midfacial deficiency or true mandibular prognathism is perhaps the most challenging situation for the clinician. Many orthopedic appliances like chin cup, facemask, and so on have been advocated to correct class III malocclusion. The major problems with these appliances are physical appearance, skin irritation from the anchorage pads and hence, less patient compliance. We present management of class III malocclusion in two children with modified tandem appliance (MTA), which is an intraoral appliance, with no extraoral anchorage, and has better patient compliance and cooperation.

  2. Assessment of temporomandibular disorder and occlusion in treated class III malocclusion patients

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    Karyna Valle-Corotti; Arnaldo Pinzan; Caio Vinícius Martins do Valle; Ana Carla Raphaelli Nahás; Mauro Vinícius Corotti

    2007-01-01

    Objective: The aims of this study were to compare the prevalence of temporomandibular disorders (TMD) in individuals submitted to either orthodontic or ortho-surgical Class III malocclusion treatment and to assess the influence of occlusal aspects on TMD severity. Material and methods: The sample consisted of 50 individuals divided into two groups, according to the type of treatment (orthodontic or orthodontic with orthognathic surgery). The presence of signs and symptoms of TMD was evaluated...

  3. Relationship between Class III malocclusion and hyoid bone displacement during swallowing: a cine-magnetic resonance imaging study

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    Gokce, Sila Mermut; Gokce, Hasan Suat; Gorgulu, Serkan; Karacay, Seniz; Akca, Eralp; Olmez, Huseyin

    2012-01-01

    Objective The displacement of the hyoid bone (HB) is a critical biomechanical component of the swallowing function. The aim of this study was to evaluate the swallowing-induced vertical and horizontal displacements of the HB in subjects with 2 different magnitudes of skeletal Class III malocclusion, by means of real-time, balanced turbo-field-echo (B-TFE) cine-magnetic resonance imaging. Methods The study population comprised 19 patients with mild skeletal Class III malocclusion, 16 with seve...

  4. Transparent aligners: An invisible approach to correct mild skeletal class III malocclusion.

    Science.gov (United States)

    Yezdani, A Arif

    2015-04-01

    This case report highlights the treatment of a mild skeletal class III malocclusion with an invisible thermoplastic retainer. A 15-year-old female patient presented with a mild skeletal class III malocclusion with a retrognathic maxilla, orthognathic mandible, a low mandibular plane angle with Angle's class III malocclusion with maxillary lateral incisors in anterior cross-bite with crowding of maxillary anteriors, imbricated and rotated mandibular incisors and deep bite. Accurate upper and lower impressions and a bite registration were taken with polyvinyl siloxane rubber base impression material. This was then sent to the lab for the processing of a series of ClearPath aligners. The ClearPath virtual set-up sent from the lab provided the treatment plan and interproximal reduction estimation complete with posttreatment results. This enabled the clinician to actively participate in the treatment plan and provide the necessary suggestions. The ClearPath three-dimensional aligner was found to have effectively corrected the anterior cross-bite and crowding of the maxillary anteriors.

  5. Transparent aligners: An invisible approach to correct mild skeletal class III malocclusion

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    A Arif Yezdani

    2015-01-01

    Full Text Available This case report highlights the treatment of a mild skeletal class III malocclusion with an invisible thermoplastic retainer. A 15-year-old female patient presented with a mild skeletal class III malocclusion with a retrognathic maxilla, orthognathic mandible, a low mandibular plane angle with Angle′s class III malocclusion with maxillary lateral incisors in anterior cross-bite with crowding of maxillary anteriors, imbricated and rotated mandibular incisors and deep bite. Accurate upper and lower impressions and a bite registration were taken with polyvinyl siloxane rubber base impression material. This was then sent to the lab for the processing of a series of ClearPath aligners. The ClearPath virtual set-up sent from the lab provided the treatment plan and interproximal reduction estimation complete with posttreatment results. This enabled the clinician to actively participate in the treatment plan and provide the necessary suggestions. The ClearPath three-dimensional aligner was found to have effectively corrected the anterior cross-bite and crowding of the maxillary anteriors.

  6. The effects of two methods of Class III malocclusion treatment on temporomandibular disorders.

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    Kurt, Hanefi; Alioğlu, Ceylan; Karayazgan, Banu; Tuncer, Necat; Kılıçoğlu, Hülya

    2011-12-01

    The aim of this research was to evaluate, within a controlled clinical study, the effects of a Delaire-type facemask or a modified Jasper Jumper (JJ) used in the treatment of children with Class III malocclusions due to maxillary retrognathia on temporomandibular disorders (TMDs). Forty-six patients with Class III malocclusions referred for orthodontic treatment were divided into two groups, a test and a control. The test group comprised 33 randomly chosen patients (15 females, 18 males) aged 8-11 years. The control group included 13 patients (eight females, five males) with similar features. TMD assessment was performed before and after treatment using a two-axis questionnaire, the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMDs). Qualitative data were evaluated using chi-square and McNemar tests. No statistically significant differences related to the presence of TMD were observed pre- or post-treatment (P > 0.05). The most commonly encountered diagnosis was arthralgia in the JJ group both before and after treatment. Evaluation of joint and muscle regions showed decreased symptoms, apart from the diagnosed discomforts, in the JJ group (P < 0.05). Reduced symptoms were observed in the Delaire group; however, this reduction was not statistically significant. An increase, not considered to be statistically significant, was observed in the control group. The Delaire-type facemask and modified JJ used in the early phase of Class III malocclusion treatment did not result in TMD.

  7. Two-phase treatment of patients with crossbite and tendency toward skeletal Class III malocclusion

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    Maria de Lourdes Machado Bayerl

    2014-08-01

    Full Text Available Angle Class III malocclusion is characterized by an inadequate anteroposterior dental relationship which may or may not be accompanied by skeletal changes. In general, patients are distressed by a significantly compromised facial aspect which, when associated with a deficient middle third, encourages patients to seek treatment. This article reports a two-phase treatment carried out in a female patient aged six years and six months with a tendency towards a Class III skeletal pattern. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO. It is representative of the Discrepancy Index (DI category, and fulfills part of the requirements for obtaining BBO Diploma.

  8. [The craniofacial architecture of class III malocclusion using the Coben analysis].

    Science.gov (United States)

    Vallée-Cussac, V

    1991-01-01

    In this study, longitudinal tracings of dental and skeletal Class III malocclusion group are compared to tracings of COBEN analysis standard values. Cephalometric measurements and surimpositions illustrate the dynamic variations of Class III cranio-facial architecture for two age ranges: 8 years +/- 1 year and 16 years +/- 1 year. The Class III pathology for children 8 years +/- 1 year aged is characterized by alterations of tracings sizes and position with excessive cranio-facial components length and rotation of cranial base into a more vertical position. A growth rate deficiency in length with a variable individual adaptation is showed for cranial structures except the mandibule after growth at the age of 16 years +/- 1 year.

  9. [Effect of extraoral facemask appliance in 48 cases of malocclusion and dentofacial deformity in class III].

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    Zhang, X; Su, X

    1993-10-01

    Malocclusion and dentofacial deformity in class III is always characterized by maxillary skeletal retrusion and/or mandibular protrusion. It affects function and facial esthetics. An orthopedic mask appliance with class III extraoral traction made by the authors was applied in 48 cases from Aug. 1985 to Oct. 1991. The study population included 5 patients with deciduous dentition, 30 with permanent dentition, and 13 with mixed dentition. The second deciduous molars or permanent first molars are a class III relationship. These exhibited bilateral crossbites and negative overjet greater than 5 mm severe arch length discrepancies existed in both arches, maxillary skeletal retrusion and/or mandibular protrusion. The results of these 48 cases were very satisfactory. The relationship between maxillary and mandibular second deciduous molar or permanent first molar all showed centric occlusal position. Dentofacial orthopedics therapy is one of the most important treatments of malocclusion and dentofacial deformity. The choice of therapy and orthodontic force must follow the age and endurance of the patient. Also, exercise of the tongue muscle must be considered.

  10. Management of severe skeletal Class III malocclusion with bimaxillary orthognathic surgery

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    Jitesh Haryani

    2016-01-01

    Full Text Available Orthognathic surgery in conjunction with fixed orthodontics is a common indication for interdisciplinary management of severe skeletal Class III malocclusion. A thorough analysis of pretreatment investigations and development of a surgical visual treatment objective is essential to plan the type of surgical technique required. Bimaxillary orthognathic surgery is the most common type of surgical procedure for severe skeletal discrepancies. The present case report is a combined ortho-surgical team management of a skeletally Class III patient. The severity of the case required bilateral upper first premolar extraction for dentoalveolar decompensation and simultaneous “Two-jaw surgery” with maxillary advancement of 4 mm and mandibular setback of 7 mm. Postsurgery, a pleasing good facial profile was achieved with Class II molar relation and positive overjet.

  11. Management of severe skeletal Class III malocclusion with bimaxillary orthognathic surgery.

    Science.gov (United States)

    Haryani, Jitesh; Nagar, Amit; Mehrotra, Divya; Ranabhatt, Rani

    2016-01-01

    Orthognathic surgery in conjunction with fixed orthodontics is a common indication for interdisciplinary management of severe skeletal Class III malocclusion. A thorough analysis of pretreatment investigations and development of a surgical visual treatment objective is essential to plan the type of surgical technique required. Bimaxillary orthognathic surgery is the most common type of surgical procedure for severe skeletal discrepancies. The present case report is a combined ortho-surgical team management of a skeletally Class III patient. The severity of the case required bilateral upper first premolar extraction for dentoalveolar decompensation and simultaneous "Two-jaw surgery" with maxillary advancement of 4 mm and mandibular setback of 7 mm. Postsurgery, a pleasing good facial profile was achieved with Class II molar relation and positive overjet.

  12. Class III malocclusion with maxillary deficiency, mandibular prognathism and facial asymmetry

    Science.gov (United States)

    Almeida, Guilherme de Araújo

    2016-01-01

    ABSTRACT This article reports the clinical case of a female patient with history of unsuccessful orthodontic treatment. She presented with Class III malocclusion, mandibular and maxillary constriction, anterior crossbite and facial asymmetry resulting from laterognathism triggered by hyperactivity of the condyle revealed by vertical elongation of the right mandibular ramus. Patient's treatment consisted of orthodontic mechanics and two orthognathic surgical interventions with satisfactory and stable outcomes. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements for obtaining the BBO Diplomate title. PMID:27901236

  13. Class III malocclusion with maxillary deficiency, mandibular prognathism and facial asymmetry.

    Science.gov (United States)

    Almeida, Guilherme de Araújo

    2016-01-01

    This article reports the clinical case of a female patient with history of unsuccessful orthodontic treatment. She presented with Class III malocclusion, mandibular and maxillary constriction, anterior crossbite and facial asymmetry resulting from laterognathism triggered by hyperactivity of the condyle revealed by vertical elongation of the right mandibular ramus. Patient's treatment consisted of orthodontic mechanics and two orthognathic surgical interventions with satisfactory and stable outcomes. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements for obtaining the BBO Diplomate title.

  14. Class III malocclusion with maxillary deficiency, mandibular prognathism and facial asymmetry

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    Guilherme de Araújo Almeida

    Full Text Available ABSTRACT This article reports the clinical case of a female patient with history of unsuccessful orthodontic treatment. She presented with Class III malocclusion, mandibular and maxillary constriction, anterior crossbite and facial asymmetry resulting from laterognathism triggered by hyperactivity of the condyle revealed by vertical elongation of the right mandibular ramus. Patient's treatment consisted of orthodontic mechanics and two orthognathic surgical interventions with satisfactory and stable outcomes. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, as part of the requirements for obtaining the BBO Diplomate title.

  15. Facial and occlusal esthetic improvements of an adult skeletal Class III malocclusion using surgical, orthodontic, and implant treatment

    OpenAIRE

    de Almeida Cardoso, Mauricio; Molon, Rafael Scaf de [UNESP; de Avila, Erica Dorigatti; Guedes, Fabio Pinto; Battilani Filho, Valter Antonio Ban; CAPELOZZA FILHO, Leopoldino; Correa, Marcio Aurelio; NARY FILHO, Hugo

    2016-01-01

    The aim of this clinical report is to describe the complex treatment of an adult Class III malocclusion patient who was disappointed with the outcome of a previous oral rehabilitation. Interdisciplinary treatment planning was performed with a primary indication for implant removal because of marginal bone loss and gingival recession, followed by orthodontic and surgical procedures to correct the esthetics and skeletal malocclusion. The comprehensive treatment approach included: (1) implant re...

  16. Diagnosis and conservative treatment of skeletal Class III malocclusion with anterior crossbite and asymmetric maxillary crowding.

    Science.gov (United States)

    Tseng, Linda L Y; Chang, Chris H; Roberts, W Eugene

    2016-04-01

    A man, aged 28 years 9 months, came for an orthodontic consultation for a skeletal Class III malocclusion (ANB angle, -3°) with a modest asymmetric Class II and Class III molar relationship, complicated by an anterior crossbite, a deepbite, and 12 mm of asymmetric maxillary crowding. Despite the severity of the malocclusion (Discrepancy Index, 37), the patient desired noninvasive camouflage treatment. The 3-Ring diagnosis showed that treatment without extractions or orthognathic surgery was a viable approach. Arch length analysis indicated that differential interproximal enamel reduction could resolve the crowding and midline discrepancy, but a miniscrew in the infrazygomatic crest was needed to retract the right buccal segment. The patient accepted the complex, staged treatment plan with the understanding that it would require about 3.5 years. Fixed appliance treatment with passive self-ligating brackets, early light short elastics, bite turbos, interproximal enamel reduction, and infrazygomatic crest retraction opened the vertical dimension of the occlusion, improved the ANB angle by 2°, and achieved excellent alignment, as evidenced by a Cast Radiograph Evaluation score of 28 and a Pink and White dental esthetic score of 3.

  17. Surgical-orthodontic treatment of Class III malocclusion with agenesis of lateral incisor and unerupted canine

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    Bruno Boaventura Vieira

    2013-06-01

    Full Text Available INTRODUCTION: Orthodontic-surgical treatment was performed in patient with skeletal Class III malocclusion due to exceeding mandibular growth. Patient also presented upper and lower dental protrusion, overjet of -3.0 mm, overbite of -1.0 mm, congenital absence of tooth #22, teeth #13 and supernumerary impaction, tooth #12 with conoid shape and partly erupted in supraversion, prolonged retention of tooth #53, tendency to vertical growth of the face and facial asymmetry. The discrepancy on the upper arch was -2.0 mm and -5.0 mm on the lower arch. METHODS: The pre-surgical orthodontic treatment was performed with extractions of the teeth #35 and #45. On the upper arch, teeth #53, #12 and supernumerary were extracted to accomplish the traction of the impacted canine. The spaces of the lower extractions were closed with mesialization of posterior segment. After aligning and leveling the teeth, extractions spaces closure and correct positioning of teeth on the bone bases, the correct intercuspation of the dental arch, with molars and canines in Angle's Class I, coincident midline, normal overjet and overbite and ideal torques, were evaluated through study models. The patient was submitted to orthognathic surgery and then the post-surgical orthodontic treatment was finished. RESULTS: The Class III malocclusion was treated establishing occlusal and facial normal standards.

  18. Two-phase treatment of patients with crossbite and tendency toward skeletal Class III malocclusion.

    Science.gov (United States)

    Bayerl, Maria de Lourdes Machado

    2014-01-01

    Angle Class III malocclusion is characterized by an inadequate anteroposterior dental relationship which may or may not be accompanied by skeletal changes. In general, patients are distressed by a significantly compromised facial aspect which, when associated with a deficient middle third, encourages patients to seek treatment. This article reports a two-phase treatment carried out in a female patient aged six years and six months with a tendency towards a Class III skeletal pattern. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO). It is representative of the category with Discrepancy Index (DI) equal or greater than 10, and fulfills part of the requirements for obtaining BBO Diploma.

  19. Using networks to understand medical data: the case of Class III malocclusions.

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    Antonio Scala

    Full Text Available A system of elements that interact or regulate each other can be represented by a mathematical object called a network. While network analysis has been successfully applied to high-throughput biological systems, less has been done regarding their application in more applied fields of medicine; here we show an application based on standard medical diagnostic data. We apply network analysis to Class III malocclusion, one of the most difficult to understand and treat orofacial anomaly. We hypothesize that different interactions of the skeletal components can contribute to pathological disequilibrium; in order to test this hypothesis, we apply network analysis to 532 Class III young female patients. The topology of the Class III malocclusion obtained by network analysis shows a strong co-occurrence of abnormal skeletal features. The pattern of these occurrences influences the vertical and horizontal balance of disharmony in skeletal form and position. Patients with more unbalanced orthodontic phenotypes show preponderance of the pathological skeletal nodes and minor relevance of adaptive dentoalveolar equilibrating nodes. Furthermore, by applying Power Graphs analysis we identify some functional modules among orthodontic nodes. These modules correspond to groups of tightly inter-related features and presumably constitute the key regulators of plasticity and the sites of unbalance of the growing dentofacial Class III system. The data of the present study show that, in their most basic abstraction level, the orofacial characteristics can be represented as graphs using nodes to represent orthodontic characteristics, and edges to represent their various types of interactions. The applications of this mathematical model could improve the interpretation of the quantitative, patient-specific information, and help to better targeting therapy. Last but not least, the methodology we have applied in analyzing orthodontic features can be applied easily to other

  20. Early treatment of class III malocclusion with modified tandem traction bow appliance and a brief literature review.

    Science.gov (United States)

    Sharma, Akhilesh; Joshi, Sourabh Ramesh; Hegde, Amitha M; Shetty, Rajmohan

    2014-09-01

    The accurate diagnosis and clinical management of class III malocclusion continues to be a challenging task for the pediatric dentist due to the poor compliance of patient and high rate of relapse. Two cases of early treatment of class III malocclusion are presented which were treated by modified tandem traction bow appliance. The correction in the cross bite was achieved in six to seven months. Children's compliance and acceptance for the appliance was good. Follow up of two years and one years showed no relapse.

  1. Management of an Adult with Spaced Dentition, Class III Malocclusion and Open-bite Tendency.

    Science.gov (United States)

    Kaya, Demet; Taner, Tulin Ugur

    2011-01-01

    The aim of this case report was to present the orthodontic treatment of an adult with spaced dentition, Class III malocclusion, and open-bite tendency. A 28.4-year-old adult woman was concerned about the unesthetic appearance of her spaced dentition localized at both upper and lower arches while smiling. She had a mild tongue thrust, hypertropic upper frenum, and mild speech difficulty while pronouncing "s". Her profile was straight with prominent lips. Molar relationship was Class III on both sides. Anterior teeth were in an end-to-end relationship. Lower dental midline was deviated to the left side. Cephalometric analysis revealed a skeletal Class III relationship with hyperdivergent facial pattern. The treatment plan included myotherapeutic exercises for the tongue thrust habit and a diagnostic set-up for closure of diastemas. A strict retention protocol was followed combined with gingivoplasty, fiberotomy, and frenectomy procedures. All spaces were closed successfully, adequate overbite and overjet relationships were obtained, and tongue thrust habit and speech difficulty while pronouncing "s" were eliminated. Clinical and cephalometric results indicated the maintenance of the treatment outcome at 6-months post-retention period.

  2. Compensatory orthodontic treatment of skeletal Class III malocclusion with anterior crossbite

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    José Valladares Neto

    2014-01-01

    Full Text Available INTRODUCTION: This case report describes the orthodontic treatment of an adult patient with skeletal Class III malocclusion and anterior crossbite. A short cranial base led to difficulties in establishing a cephalometric diagnosis. The patient's main complaint comprised esthetics of his smile and difficulties in mastication. METHODS: The patient did not have the maxillary first premolars and refused orthognathic surgery. Therefore, the treatment chosen was orthodontic camouflage and extraction of mandibular first premolars. For maxillary retraction, the vertical dimension was temporarily increased to avoid obstacles to orthodontic movement. RESULTS: At the end of the treatment, ideal overjet and overbite were achieved. CONCLUSION: Examination eight years after orthodontic treatment revealed adequate clinical stability. This case report was submitted to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as part of the requirements to become a BBO diplomate.

  3. Segmental LeFort I osteotomy for treatment of a class III malocclusion with temporomandibular disorder

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    Marcos Janson

    2008-08-01

    Full Text Available This article reports the case of a 19-year-old young man with Class III malocclusion and posterior crossbite with concerns about temporomandibular disorder (TMD, esthetics and functional problems. Surgical-orthodontic treatment was carried out by decompensation of the mandibular incisors and segmentation of the maxilla in 4 pieces, which allowed expansion and advancement. Remission of the signs and symptoms occurred after surgical-orthodontic intervention. The maxillary dental arch presented normal transverse dimension. Satisfactory static and functional occlusion and esthetic results were achieved and remained stable. Three years after the surgical-orthodontic treatment, no TMD sign or symptom was observed and the occlusal results had not changed. When vertical or horizontal movements of the maxilla in the presence of moderate maxillary constriction are necessary, segmental LeFort I osteotomy can be an important part of treatment planning.

  4. Camouflage treatment of skeletal class III malocclusion with asymmetry using a bone-borne rapid maxillary expander.

    Science.gov (United States)

    Seo, Yu-Jin; Chung, Kyu-Rhim; Kim, Seong-Hun; Nelson, Gerald

    2015-03-01

    This case report presents the successful use of palatal mini-implants for rapid maxillary expansion and mandibular distalization in a skeletal Class III malocclusion. The patient was a 13-year-old girl with the chief complaint of facial asymmetry and a protruded chin. Camouflage orthodontic treatment was chosen, acknowledging the possibility of need for orthognathic surgery after completion of her growth. A bone-borne rapid expander (BBRME) was used to correct the transverse discrepancy and was then used as indirect anchorage for distalization of the lower dentition with Class III elastics. As a result, a Class I occlusion with favorable inclination of the upper teeth was achieved without any adverse effects. The total treatment period was 25 months. Therefore, BBRME can be considered an alternative treatment in skeletal Class III malocclusion.

  5. Orthodontic decompensation and correction of skeletal Class III malocclusion with gradual dentoalveolar remodeling in a growing patient.

    Science.gov (United States)

    Cai, Bin; Zhao, Xiao-Guang; Xiang, Lu-Sai

    2014-03-01

    An 8-year-old girl with a skeletal Class III malocclusion was treated in 2 phases. Maxillary expansion and protraction were carried out as the early intervention. However, her maxillary hypoplasia and mandibular hyperplasia deteriorated with age. The phase 2 comprehensive treatment began with proper mechanics when she was 12 years old with growth potential. In the maxillary arch, an auxiliary rectangular wire was used with a round main wire and an opening spring to create space for the impacted teeth and to bodily move the anterior teeth forward. Decompensation of mandibular incisors and correction of the Class III malocclusion were achieved by short Class III elastics with light forces and a gentle interaction between the rectangular wires and the lingual root-torque slots. The phase 2 active treatment period was 4 years 8 months. The 2-year follow-up indicated that our treatment results were quite stable.

  6. Base of the skull morphology and Class III malocclusion in patients with unilateral cleft lip and palate

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    Mariana Maciel Tinano

    2015-02-01

    Full Text Available OBJECTIVE: The aim of the present study was to determine the morphological differences in the base of the skull of individuals with cleft lip and palate and Class III malocclusion in comparison to control groups with Class I and Class III malocclusion. METHODS: A total of 89 individuals (males and females aged between 5 and 27 years old (Class I, n = 32; Class III, n = 29; and Class III individuals with unilateral cleft lip and palate, n = 28 attending PUC-MG Dental Center and Cleft Lip/Palate Care Center of Baleia Hospital and PUC-MG (CENTRARE were selected. Linear and angular measurements of the base of the skull, maxilla and mandible were performed and assessed by a single calibrated examiner by means of cephalometric radiographs. Statistical analysis involved ANCOVA and Bonferroni correction. RESULTS: No significant differences with regard to the base of the skull were found between the control group (Class I and individuals with cleft lip and palate (P > 0.017. The cleft lip/palate group differed from the Class III group only with regard to CI.Sp.Ba (P = 0.015. Individuals with cleft lip and palate had a significantly shorter maxillary length (Co-A in comparison to the control group (P < 0.001. No significant differences were found in the mandible (Co-Gn of the control group and individuals with cleft lip and palate (P = 1.000. CONCLUSION: The present findings suggest that there are no significant differences in the base of the skull of individuals Class I or Class III and individuals with cleft lip and palate and Class III malocclusion.

  7. Assessment of temporomandibular disorder and occlusion in treated class III malocclusion patients

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    Karyna Valle-Corotti

    2007-04-01

    Full Text Available OBJECTIVE: The aims of this study were to compare the prevalence of temporomandibular disorders (TMD in individuals submitted to either orthodontic or ortho-surgical Class III malocclusion treatment and to assess the influence of occlusal aspects on TMD severity. MATERIAL AND METHODS: The sample consisted of 50 individuals divided into two groups, according to the type of treatment (orthodontic or orthodontic with orthognathic surgery. The presence of signs and symptoms of TMD was evaluated by an anamnestic questionnaire and a clinical examination, including TMJ and muscle palpation, active mandibular range of motion, joint noises and occlusal examination. RESULTS: Based on the anamnestic questionnaire, 48% had no TMD, 42% had mild TMD and 10% had moderate TMD. The presence and severity of TMD did not show any relationship with the type of orthodontic treatment (p>0.05. The chi-square test showed a positive association (p<0.05 between TMD and non-working side occlusal interferences. CONCLUSION: Based on the methodology used and the results obtained, it may be concluded that Class III orthodontic treatment was not associated with the presence of TMD signs and symptoms and the non-working side contacts can be occlusal factors of risk. There was no significant difference in TMD prevalence between the studied groups (orthodontically treated patients and patients treated with orthodontics followed by orthognathic surgery.

  8. Influence of morphological parameters on the development of gingival recession in class III malocclusion.

    Science.gov (United States)

    Warmuz, Justyna; Jagielak, Maciej; Botzenhart, Ute; Seeliger, Julia; Gedrange, Tomasz; Dominiak, Marzena

    2016-07-01

    Cephalometric analysis, including both basic cranio- and gnathometric measurements and detailed evaluation of the construction of skeletal, muscular and mucosal systems combined with estimation of the risk of recession's occurrence, can be used to determine the direction of therapy and ensure appropriate aesthetic-functional effects of treatment. The objective of the present study was to compare the influence of the chosen morphologic parameters on the development of gingival recession in the front part of the jaw in patients with Angle class III. The research material was based on the medical documentation of 1800 patients. Sixty generally healthy patients qualified for the research with prognathism. On the basis of the side-head cephalograms, measurements were carried out to describe the bone structure in the front section of the lower jaw. The lower incisor teeth set-up was also analyzed. Gum recession of the lower incisor teeth was assessed on the basis of the inside-mouth photos of the patients with class III malocclusion. The occurrence of recession in a further 4 patients resulted from such a positioning of the lower teeth. In patients in the first group, treated with complex ortho-surgical treatment, the lower incisor teeth were adjusted much more vertically in the alveola and, thus, recession occurred only in one patient. Complex orthodontic-surgical therapy contributes to recession development to a lesser degree than the sham treatment and makes it a safe alternative therapy in patients with high diathesis for occurrence or progression of an existing recession.

  9. Analysis of variation of sagittal position of the jaw bones in skeletal class III malocclusion

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    Stojanović Zdenka

    2012-01-01

    Full Text Available Background/Aim. Skeletal Class III malocclusion is a discrepancy in the sagittal jaw relationship, due to imbalances in their development and/or position, resulting in the dominant appearance of the lower jaw in facial profile. The aim of this study was to determine variations in the sagittal position of the jaw bones to the cranial base in subjects with skeletal Class III, for the earliest possible diagnosis of malocclusion. Methods. Fifty children and as many adults with skeletal Class III, both sexes, were examined and selected, based on the findings of sagittal interjaw relationship (ANB ≤ 0° from the cephalometric analysis of tele-x-ray profile head shots. The subjects were grouped according to age. The first group consisted of children aged 6-12 years, and another group, of adults aged 18-26 years. We measured the angles of maxillary prognathism (SNA, mandibular prognathism (SNB and ANB. Based on these results, within the respective groups subclassification into the subgroups was done, among which a significant difference measured values was evaluated. In both groups a significant correlation of the determined values was evaluated. Results. An average SNA angle ranged 77.36 ± 3.58 in children and 77.32 ± 4.88 in adults, while an average SNB angle was 79.46 ± 3.91 in the group of children and 81.12 ± 3.76 in adults. An average ANB angle was -2.10 ± 2.07 in children, and -4.00 ± 2.34 in adults. In both groups, a significant correlation between the measured values and a significant difference in the values of all the measured parameters were found between patients from different subgroups (p < 0.01. Conclusion. The most common morphological variation of sagittal position of the upper jaw is its retrognatism, which is equally present in both children and adults. Sagittal position of the lower jaw in most of the adults was prognathic, while mandible prognathism in the children was less present.

  10. Má oclusão Classe III de Angle com discrepância ântero-posterior acentuada Angle Class III malocclusion with severe anteroposterior disharmony

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    Marcos Alan Vieira Bittencourt

    2009-02-01

    Full Text Available A má oclusão Classe III de Angle é caracterizada por uma discrepância dentária ântero-posterior, que pode ou não estar acompanhada por alterações esqueléticas. Em geral, o aspecto facial fica bastante comprometido, sendo justamente esse fator, na maioria das vezes, que motiva o paciente a procurar pelo tratamento. Este caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 4, ou seja, uma má oclusão com discrepância ântero-posterior acentuada, Classe III, com ANB menor ou igual a -2º, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.Angle Class III malocclusion is characterized by an anteroposterior dental discrepancy which may or may not be accompanied by skeletal changes. In general, distressed by a significantly compromised facial aspect, patients tend to seek treatment. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO, as representative of Category 4, i.e., a malocclusion with severe anteroposterior discrepancy, Class III, and ANB Angle equal to or smaller than -2º, as part of the requirements for obtaining the BBO Diploma.

  11. Oral Rehabilitation With Orthognathic Surgery After Dental Implant Placement for Class III Malocclusion With Skeletal Asymmetry and Posterior Bite Collapse.

    OpenAIRE

    2015-01-01

    Increasing numbers of older patients are seeking orthognathic surgery to treat jaw deformity. However, orthodontic and orthognathic surgical treatment is difficult in cases without occlusal vertical stop. A 55-year-old man presented with Class III malocclusion and mandibular protrusion including esthetic problems and posterior bite collapse. He underwent dental implant treatment to reconstruct an occlusal vertical stop before orthognathic surgery. His occlusal function and esthetic problems i...

  12. Is alternate rapid maxillary expansion and constriction an effective protocol in the treatment of Class III malocclusion? A systematic review

    Science.gov (United States)

    Pithon, Matheus Melo; Santos, Nathalia de Lima; dos Santos, Camila Rangel Barreto; Baião, Felipe Carvalho Souza; Pinheiro, Murilo Costa Rangel; Matos, Manoel; Souza, Ianderlei Andrade; de Paula, Rafael Pereira

    2016-01-01

    ABSTRACT Introduction: the treatment of Class III malocclusion in early age is one of the greatest challenges for orthodontists, and the establishment of more effective treatment method is a constant concern for these professionals. Thus, the objective of this systematic review is to verify the effectiveness of the therapy protocol for alternate rapid maxillary expansion and constriction (Alt-RAMEC) in the early treatment of Class III malocclusion. Methods: searches were performed in the following electronic databases: Cochrane Library, Medline (EBSCO and PubMed), SciELO, LILACS and Scopus. The following inclusion criteria were used: in vivo studies conducted with early intervention (patient in craniofacial development phase) with the use of the Alt-RAMEC protocol. Reviews, case reports, editorials, and studies with syndromic patients or under use of systemic drug were excluded. Duplicates were also excluded. The studies were assessed for methodological quality using the Cochrane tool for assessment of risk of bias, and classified as high or low risk of bias. Results: 53 articles were found. Duplicates exclusion was thus performed and 35 articles remained. After inclusion analysis, only 5 matched the criteria. Two articles were classified as low risk of bias and three as high risk of bias. It was observed that the Alt-RAMEC enable protraction in less time and with better results, promoting greater effectiveness in the protraction treatment of Class III malocclusion. Conclusions: Although there is positive evidence of the effectiveness of early treatment with the Alt-RAMEC protocol in patients with Class III malocclusion, further studies are needed to confirm its effectiveness using long-term methodology. PMID:28125138

  13. Is alternate rapid maxillary expansion and constriction an effective protocol in the treatment of Class III malocclusion? A systematic review

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    Matheus Melo Pithon

    Full Text Available ABSTRACT Introduction: the treatment of Class III malocclusion in early age is one of the greatest challenges for orthodontists, and the establishment of more effective treatment method is a constant concern for these professionals. Thus, the objective of this systematic review is to verify the effectiveness of the therapy protocol for alternate rapid maxillary expansion and constriction (Alt-RAMEC in the early treatment of Class III malocclusion. Methods: searches were performed in the following electronic databases: Cochrane Library, Medline (EBSCO and PubMed, SciELO, LILACS and Scopus. The following inclusion criteria were used: in vivo studies conducted with early intervention (patient in craniofacial development phase with the use of the Alt-RAMEC protocol. Reviews, case reports, editorials, and studies with syndromic patients or under use of systemic drug were excluded. Duplicates were also excluded. The studies were assessed for methodological quality using the Cochrane tool for assessment of risk of bias, and classified as high or low risk of bias. Results: 53 articles were found. Duplicates exclusion was thus performed and 35 articles remained. After inclusion analysis, only 5 matched the criteria. Two articles were classified as low risk of bias and three as high risk of bias. It was observed that the Alt-RAMEC enable protraction in less time and with better results, promoting greater effectiveness in the protraction treatment of Class III malocclusion. Conclusions: Although there is positive evidence of the effectiveness of early treatment with the Alt-RAMEC protocol in patients with Class III malocclusion, further studies are needed to confirm its effectiveness using long-term methodology.

  14. Effectiveness of interceptive treatment of class III malocclusions with skeletal anchorage: A systematic review and meta-analysis

    Science.gov (United States)

    Rodríguez de Guzmán-Barrera, Jorge; Sáez Martínez, Carla; Boronat-Catalá, Montserrat; Montiel-Company, Jose María; Paredes-Gallardo, Vanessa; Gandía-Franco, José Luís; Almerich-Silla, José Manuel; Bellot-Arcís, Carlos

    2017-01-01

    Recently, new strategies for treating class III malocclusions have appeared. Skeletal anchorage appears to reduce the dentoalveolar effects while maximising the orthopaedic effect in growing patients. The purpose of this systematic review and meta-analysis is to examine the effectiveness of bone anchorage devices for interceptive treatment of skeletal class III malocclusions. Searches were made in the Pubmed, Embase, Scopus and Cochrane databases, as well as in a grey literature database, and were complemented by hand-searching. The criteria for eligibility were: patients who had undergone orthodontic treatment with skeletal anchorage (miniplates and miniscrews). Patients with syndromes or craniofacial deformities or who had undergone maxillofacial surgery were excluded. The following variables were recorded for each article: author, year of publication, type of study, sample size, dropouts, demographic variables, treatment carried out, radiographic study (2D or 3D), follow-up time, and quality of the articles on the Newcastle-Ottawa Scale. The means and confidence intervals of the following variables were employed: Wits, overjet, ANB, SNA and SNB. Initially, 239 articles were identified. After removing the duplicates and applying the selection criteria, 9 were included in the qualitative synthesis and 7 in the quantitative synthesis (meta-analysis). It may be concluded that skeletal anchorage is an effective treatment for improving skeletal Class III malocclusion, but when compared with other traditional treatments such as disjunction and face mask, there is no clear evidence that skeletal anchorage improves the results. PMID:28328995

  15. Conservative treatment for a growing patient with a severe, developing skeletal Class III malocclusion and open bite.

    Science.gov (United States)

    Xu, Yue; Zhu, Ping; Le, Linda; Cai, Bin

    2014-06-01

    An 8-year-old Chinese girl sought treatment for a severe skeletal Class III malocclusion and open-bite skeletal pattern. Traditionally, patients with a skeletal Class III malocclusion are treated after they have stopped growing, and then they are treated with a combined orthodontic and orthognathic surgery approach. But the risks and expenses of this treatment plan are not acceptable to all patients. This young patient was treated with facemask therapy, a maxillary expansion device, and a molar occlusal splint for maxillary developmental stimulation with control of vertical jaw growth. After the completion of orthopedic therapy, 2 × 4 technology was used to adjust molar positions. A bonded tongue crib was used in the early permanent dentition to help the patient break her bad tongue habits. Straight-wire appliances were used for 16 months to adjust the occlusal relationship. This achieved significant improvement in anterior tooth relationships and facial profile esthetics. At the 2-year posttreatment follow-up, the results were satisfactory. The success of the sagittal relationship correction between the maxilla and the mandible for a skeletal Class III malocclusion depends on the coordination of transverse and vertical relationships combined with the growth potential of each patient.

  16. Skeletal stability of surgery-first bimaxillary orthognathic surgery for skeletal class III malocclusion, using standardized criteria.

    Science.gov (United States)

    Park, K-H; Sandor, G K; Kim, Y-D

    2016-01-01

    The purpose of this study was to compare the postoperative stability following bimaxillary surgery performed either with or without preoperative orthodontic treatment, in class III malocclusion patients. These patients were enrolled using standardized inclusion criteria. Forty patients with a class III malocclusion were included in this retrospective study. Inclusion criteria were class III malocclusion with and without premolar extraction, <3mm midline deviation, and <5mm arch width discordance. Patients were assigned to the conventional bimaxillary surgery group (n=20) or the surgery-first bimaxillary surgery group (n=20). Serial cephalometric radiographs obtained before surgery (T0), at 2 months after surgery (T1), and at 6 months after surgery (T2) were used to assess the variation in surgical change (T0 to T1) and postsurgical change (T1 to T2). Eight linear and three angular parameters were used to evaluate postoperative stability. With respect to postsurgical changes, significant differences were observed in the changes for the vertical reference plane to the posterior nasal spine, horizontal reference plane to B-point, and occlusal plane angle in both groups. No statistically significant differences in the relapse rates were observed between the two groups. No significant differences were observed between the two groups in terms of the postoperative stability.

  17. Presurgical orthodontic decompensation alters alveolar bone condition around mandibular incisors in adults with skeletal Class III malocclusion.

    Science.gov (United States)

    Sun, Boyang; Tang, Jun; Xiao, Ping; Ding, Ying

    2015-01-01

    This study is to use cone beam computed tomography (CBCT) to acquire accurate radiographic images for alveolar bone in lower incisors and the change after presurgical orthodontic treatment. Seventeen patients with skeletal Class III malocclusion, ten normal occlusion subjects, and fifteen patients treated with orthodontic treatment and orthognathic surgery were included. CBCT images were obtained. The labial and lingual inclinations of mandibular incisors, the thickness of alveolar bone, the vertical alveolar height and root length were measured. Alveolar bone thickness at the apex in patients with skeletal Class III malocclusion was thinner than normal subjects. The vertical alveolar bone heights at labial and lingual sides in patients with skeletal Class III malocclusion were both reduced compared with normal subjects, especially at the labial side. There were statistically significant correlations between lower incisor inclination and alveolar bone morphology. After orthodontics, the incisors root apex was closer to the lingual side of alveolar bone. The alveolar bone thickness at apex was not statistically changed. The vertical alveolar bone heights at the labial and lingual sides were both significantly reduced especially the lingual side after presurgical orthodontic treatment. The root length was not significantly changed. In conclusion, the alveolar bone thickness at apex is thinner and the vertical alveolar height is reduced at the labial side. Forward movement of lower incisors during presurgical orthodontic treatment can render the lower incisors root apex closer to the lingual side and the vertical alveolar height is reduced.

  18. Soft tissue changes after a mandibular osteotomy for symmetric skeletal class III malocclusion.

    Science.gov (United States)

    Ohba, Seigo; Kohara, Haruka; Koga, Takamitsu; Kawasaki, Takako; Miura, Kei-Ichirou; Yoshida, Noriaki; Asahina, Izumi

    2016-10-31

    The soft tissue profile is crucial to esthetics after orthognathic surgery. The aim of this study was to assess the soft tissue changes of the subnasal and submental regions more than 1 year after a sagittal split ramus osteotomy (SSRO) in patients with skeletal class III malocclusion. A total of 22 patients with mandibular prognathism were included in this study. Patients had lateral cephalograms before and more than 1 year after they underwent an isolated SSRO. Soft and hard tissue changes were assessed using the lateral cephalograms. The lower lip, labiomenton, and soft tissue menton moved posteriorly by 85, 89, and 88% compared with the corresponding hard tissue, and the movement of the soft tissue B point and the top of the chin nearly reflected the displacement of the hard tissues, at 96 and 99%, respectively. The labiomenton, stomions, and naso-labial angles were changed after the mandibular set-back and the changes in these angles correlated with either the width of the soft tissue or skeletal displacement. The naso-labial angle could be altered even if an isolated mandibular osteotomy is performed. Changes to the stomions and naso-labial angles were affected by hard tissue movement, while changes to the labiomental angle were affected by the width of the soft tissue after the mandibular osteotomy. It is important to create an accurate preoperative prediction of the esthetic outcomes after a mandibular osteotomy by considering the interrelations between the hard and soft tissues.

  19. Management of the Class III malocclusion treated with maxillary expansion, facemask therapy and corrective orthodontic. A 15-year follow-up.

    Science.gov (United States)

    Almeida, Renato Rodrigues de; Alessio, Luiz Eduardo; Almeida-Pedrin, Renata Rodrigues de; Almeida, Marcio Rodrigues de; Pinzan, Arnaldo; Vieira, Luiz Sérgio

    2015-01-01

    The facial growth of Class III malocclusion worsens with age, in this case, the early orthopedic treatment, providing facial balance, modifying the maxillofacial growth and development. A 7.6-year old boy presented with Class III malocclusion associated with anterior crossbite; the mandible was shifted to the right and the maxilla had a transversal deficiency. Rapid maxillary expansion followed by facemask therapy was performed, to correct the anteroposterior relationship and improve the facial profile. The patient was followed for a 15-year period, after completion of the treatment, and stability was observed. Growing patients should be monitored following their treatment, so as to prevent malocclusion relapse.

  20. Miniscrew-assisted mandibular molar distalization in a patient with skeletal class-III malocclusion: A clinical case report

    Directory of Open Access Journals (Sweden)

    Seyed Mohammadreza Safavi

    2013-01-01

    Full Text Available In nongrowing patients with mild skeletal Class-III malocclusion, premolar extraction or molar distalization in the lower arch can be done as a part of camouflage treatment. Temporary anchorage devices are widely used for this purpose because they do not produce undesirable reciprocal effects and do not depend on the patient′s cooperation. However, most reported cases in this regard have used interradicular miniscrews in the mandibular arch and these have a risk of failure as they can loosen due to collision with adjacent roots. This article showcases mandibular molar distalization utilizing miniscrews, inserted at the retromolar area to correct a Class-III problem. A 24-year-old girl with a mild skeletal Class-III malocclusion and dental Class-III molar and canine relationship bilaterally was referred for orthodontic treatment. The treatment plan included distalization of the lower molars bilaterally followed by full fixed appliance therapy, after third molar extractions. For the lower molar distalization, the miniscrews were inserted at the retromolar pad. At the end of 21 months, a Class-I molar and canine relationship, normal overjet and overbite were obtained. The average amount of distalization of mandibular first molar was 3.2 mm at the crown level. In conclusion, placing miniscrews at the retromolar pad area for lower molar distalization was found to be a simple and effective method for correcting anterior cross bite and mandibular anterior crowding or protrusion, without the need for patient compliance.

  1. Efficacy of orthopedic treatment with protraction facemask on skeletal Class III malocclusion: a systematic review and meta-analysis.

    Science.gov (United States)

    Cordasco, G; Matarese, G; Rustico, L; Fastuca, S; Caprioglio, A; Lindauer, S J; Nucera, R

    2014-08-01

    The objective of this systematic review was to estimate the efficacy of protraction facemask on the correction of Class III malocclusion in the short term. A systematic review of articles was performed using different electronic databases (PubMed, Ovid, Cochrane Central Register of Controlled Trials, Web of Science, LILACS, and Google Scholar). Search terms comprised 'orthopedic treatment' and 'Class III malocclusion'. The selection criteria were set in order to include in this review only randomized clinical trials (RCTs) performed treating with facemask Class III growing patients. Studies' selection, data extraction, and risk of bias's assessment were executed independently by two authors using pre-defined data forms. All pooled analyses of data were based on random effects models. A pre-specified subgroup analysis was planned to evaluate the effect of preliminary rapid palatal expansion on facemask efficacy. Three RCTs met our inclusion criteria. In total, data from 155 patients (92 treated and 63 controls) were collected. The treated group showed the following significant changes: ANB° +3.66° [95%CI (2.58, 4.74)]; SNA° +2.10 [95%CI (1.14, 3.06)]; SNB° -1.54 [95%CI (-2.13, -0.95)]; SN-palatal plane -0.82° [95%CI (-1.62, -0.02)]; and SN-mandibular plane +1.51 [95%CI (0.61, 2.41)]. Heterogeneity varied from low to moderate (mean I(2) value: 41.4 ± 20.8). Facemask is effective correcting Class III malocclusion in the short term. The skeletal modifications induced by facemask are forward displacement of maxilla, backward displacement of mandible, clockwise rotation of the mandibular plane, and counterclockwise rotation of the maxillary plane.

  2. Correction of a Class III malocclusion with over 20 mm of space to close in the maxilla by using miniscrews for extra anchorage.

    NARCIS (Netherlands)

    Breuning, K.H.

    2008-01-01

    Unilateral closure of maxillary extraction spaces in patients with Class III malocclusion can be challenging. This case report describes the closure of first premolar and first molar extraction spaces in a patient with a Class III dental relationship. Two miniscrews were used for intraoral skeletal

  3. Má oclusão Classe III de Angle com discrepância anteroposterior acentuada Angle Class III malocclusion with severe anteroposterior discrepancy

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    Carlos Alexandre Câmara

    2010-04-01

    Full Text Available O caso clínico apresentado refere-se ao tratamento de uma paciente com 36 anos, que apresentava uma má oclusão Classe III esquelética e dentária, com ausência dos caninos superiores. Foi realizado um tratamento ortodôntico-cirúrgico combinado, com avanço de maxila (Le Fort 1 e ajustes oclusais nos primeiros pré-molares superiores, que substituíram os caninos. Esse caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 4, ou seja, uma má oclusão com discrepância anterossuperior acentuada, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.This case report describes the treatment of a 36-year-old patient who presented a skeletal and dental Class III malocclusion and missing upper canines. The patient was treated with orthosurgical maxillary advancement (Le Fort 1 and occlusal adjustment of the first premolars, which replaced the canines. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO, as representative of Category 4, i.e., malocclusion with severe anteroposterior discrepancy, as part of the requirements for obtaining the BBO Diploma.

  4. Amelogenesis imperfecta with multiple impacted teeth and skeletal class III malocclusion: complete mouth rehabilitation of a young adult.

    Science.gov (United States)

    Patil, Pravinkumar G; Patil, Smita P

    2014-01-01

    Amelogenesis imperfecta is an autosomal dominant disorder. It is a group of hereditary diseases showing abnormal enamel density and crown malformation. This clinical report describes the oral rehabilitation of a young adult diagnosed with a variant of hypoplastic amelogenesis imperfecta with multiple impacted teeth and skeletal class III malocclusion. The treatment procedures of teeth extractions, endodontic treatment of remaining teeth followed by post and core restorations, esthetic and functional crown lengthening, and metal ceramic fixed dental prostheses were performed sequentially in the maxillary arch. The mandibular arch was restored with an overdenture. One-year follow-up revealed satisfactory results.

  5. Orthodontic decompensation in skeletal Class III malocclusion: redefining the amount of movement assessed by Cone-Beam Computed Tomography

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    José Antonio Zuega Cappellozza

    2015-10-01

    Full Text Available Introduction:Cone-Beam Computed Tomography (CBCT is essential for tridimensional planning of orthognathic surgery, as it allows visualization and evaluation of bone structures and mineralized tissues. Tomographic slices allow evaluation of tooth inclination and individualization of movement performed during preoperative decompensation. The aim of this paper was to assess maxillary and mandibular incisors inclination pre and post orthodontic decompensation in skeletal Class III malocclusion.Methods:The study was conducted on six individuals with skeletal Class III malocclusion, surgically treated, who had Cone-Beam Computed Tomographic scans obtained before and after orthodontic decompensation. On multiplanar reconstruction view, tomographic slices (axial, coronal and sagittal were obtained on the long axis of each incisor. The sagittal slice was used for measurement taking, whereas the references used to assess tooth inclination were the long axis of maxillary teeth in relation to the palatal plane and the long axis of mandibular teeth in relation to the mandibular plane.Results:There was significant variation in the inclination of incisors before and after orthodontic decompensation. This change was of greater magnitude in the mandibular arch, evidencing that natural compensation is more effective in this arch, thereby requiring more intensive decompensation.Conclusion:When routinely performed, the protocols of decompensation treatment in surgical individuals often result in intensive movements, which should be reevaluated, since the extent of movement predisposes to reduction in bone attachment levels and root length.

  6. Facial and occlusal esthetic improvements of an adult skeletal Class III malocclusion using surgical, orthodontic, and implant treatment.

    Science.gov (United States)

    de Almeida Cardoso, Mauricio; de Molon, Rafael Scaf; de Avila, Erica Dorigatti; Guedes, Fabio Pinto; Battilani Filho, Valter Antonio Ban; Capelozza Filho, Leopoldino; Correa, Marcio Aurelio; Nary Filho, Hugo

    2016-01-01

    The aim of this clinical report is to describe the complex treatment of an adult Class III malocclusion patient who was disappointed with the outcome of a previous oral rehabilitation. Interdisciplinary treatment planning was performed with a primary indication for implant removal because of marginal bone loss and gingival recession, followed by orthodontic and surgical procedures to correct the esthetics and skeletal malocclusion. The comprehensive treatment approach included: (1) implant removal in the area of the central incisors; (2) combined orthodontic decompensation with mesial displacement and forced extrusion of the lateral incisors; (3) extraction of the lateral incisors and placement of new implants corresponding to the central incisors, which received provisional crowns; (4) orthognathic surgery for maxillary advancement to improve occlusal and facial relationships; and finally, (5) orthodontic refinement followed by definitive prosthetic rehabilitation of the maxillary central incisors and reshaping of the adjacent teeth. At the three-year follow-up, clinical and radiographic examinations showed successful replacement of the central incisors and improved skeletal and esthetic appearances. Moreover, a Class II molar relationship was obtained with an ideal overbite, overjet, and intercuspation. In conclusion, we report the successful esthetic anterior rehabilitation of a complex case in which interdisciplinary treatment planning improved facial harmony, provided gingival architecture with sufficient width and thickness, and improved smile esthetics, resulting in enhanced patient comfort and satisfaction. This clinical case report might be useful to improve facial esthetics and occlusion in patients with dentoalveolar and skeletal defects.

  7. Treatment of skeletal class III malocclusion using face mask therapy with alternate rapid maxillary expansion and constriction (Alt-RAMEC protocol

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    Anand Ramchandra Rathi

    2015-01-01

    Full Text Available Class III malocclusion is very common malocclusion and can be due to maxillary retrusion, mandibular prognathism, or combination. Ellis and McNamara found a combination of maxillary retrusion and mandibular protrusion to be the most common skeletal relationship (30%. The treatment should be carried out as early as possible for permitting normal growth of the skeletal bases. Reverse pull head gear combined with maxillary expansion can effectively correct skeletal Class III malocclusion due to maxillary deficiency in growing patient. An eight-year-old female patient with chief complaint of prognathic mandible and anterior crossbite was successfully treated in duration of 5 months with facemask and expansion therapy based on Alternate Rapid Maxillary Expansion and Constriction (Alt-RAMEC protocol.

  8. Treatment of skeletal class III malocclusion using face mask therapy with alternate rapid maxillary expansion and constriction (Alt-RAMEC) protocol.

    Science.gov (United States)

    Rathi, Anand Ramchandra; Kumari, N Retna; Vadakkepuriyal, Kannan; Santhkumar, Madhu

    2015-01-01

    Class III malocclusion is very common malocclusion and can be due to maxillary retrusion, mandibular prognathism, or combination. Ellis and McNamara found a combination of maxillary retrusion and mandibular protrusion to be the most common skeletal relationship (30%). The treatment should be carried out as early as possible for permitting normal growth of the skeletal bases. Reverse pull head gear combined with maxillary expansion can effectively correct skeletal Class III malocclusion due to maxillary deficiency in growing patient. An eight-year-old female patient with chief complaint of prognathic mandible and anterior crossbite was successfully treated in duration of 5 months with facemask and expansion therapy based on Alternate Rapid Maxillary Expansion and Constriction (Alt-RAMEC) protocol.

  9. Evaluation depth of the curve of Spee in class I, class II, and class III malocclusion: A cross sectional study

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    Sanjna Nayar

    2015-01-01

    Full Text Available Occlusal plane is an essential consideration when multiple long-span posterior restorations are designed. When restorations are added to an existing tooth arrangement characterized by rotated, tipped, or extruded teeth, excursive interferences may be incorporated, resulting in detrimental squeal. The curve of Spee, which exists in the ideal natural dentition, allows harmony to exist between the anterior tooth and condylar guidance. This curve exists in the sagittal plane and is the best viewed from a lateral aspect. It permits total posterior disclusion on mandibular protrusion, given proper anterior tooth guidance. It is unclear that whether the curve of Spee is a description of the occlusal surface of each arch separately or in maximal intercuspation. The purpose of this study was to examine the differences in the depth of curve of Spee between the class I, class II, class III and to investigate the relationship of depth of curve of Spee with over jet, over-bite.

  10. Oral Rehabilitation With Orthognathic Surgery After Dental Implant Placement for Class III Malocclusion With Skeletal Asymmetry and Posterior Bite Collapse.

    Science.gov (United States)

    Ohba, Seigo; Nakatani, Yuya; Kawasaki, Takako; Tajima, Nobutaka; Tobita, Takayoshi; Yoshida, Noriaki; Sawase, Takashi; Asahina, Izumi

    2015-08-01

    Increasing numbers of older patients are seeking orthognathic surgery to treat jaw deformity. However, orthodontic and orthognathic surgical treatment is difficult in cases without occlusal vertical stop. A 55-year-old man presented with Class III malocclusion and mandibular protrusion including esthetic problems and posterior bite collapse. He underwent dental implant treatment to reconstruct an occlusal vertical stop before orthognathic surgery. His occlusal function and esthetic problems improved after surgery, and his skeletal and occlusal stability has been maintained for 6 years. Dental implant placement at appropriate positions could help to determine the position of the proximal segment at orthognathic surgery and could shorten the time required to restore esthetic and occlusal function. This case demonstrates how skeletal and dental stability can be maintained long after surgery in a patient with jaw deformity and posterior bite collapse.

  11. Management of skeletal Class III malocclusion with unilateral crossbite on a growing patient using facemask-bonded rapid palatal expander and fixed appliances

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    Tinnie Effendy

    2015-01-01

    Full Text Available Facemask (FM and bonded rapid palatal expander (RPE are part of growth modification treatments for correcting skeletal Class III pattern with retrognathic maxilla. This orthopaedic treatment is usually preceded by fixed appliances to achieve aesthetic dental alignment and improve interdigitation. This case report reviews treatment of Class III malocclusion with unilateral crossbite in a 12-year-old boy using FM and bonded RPE, followed by fixed appliances. Choice of FM and bonded RPE was in line with indication which was mild Class III malocclusion with retrognathic maxilla. Execution of treatment was made considering treatment biomechanics and patient cooperation. This orthopaedic treatment was followed by orthodontic treatment specifically aimed to correct unilateral crossbite, canine relationship yet to reach Class I, lower midline shift, as well as unintended dental consequences of using bonded RPE, namely posterior open bite and deepening curve of spee. Posttreatment facial profile and smile are more esthetic. Occlusion is significantly improved both functionally and aesthetically.

  12. Orthodontic treatment of a transposed maxillary canine and first premolar in a young patient with Class III malocclusion.

    Science.gov (United States)

    Gracco, Antonio; Siviero, Laura; Perri, Alessandro; Favero, Lorenzo; Stellini, Edoardo

    2015-11-01

    A 12-year-old girl was referred to our clinic for evaluation of an unaesthetic dental appearance. All permanent teeth were erupted, while the deciduous maxillary right canine was retained. Cone-beam computed tomography revealed a complete transposition of the maxillary left canine and first premolar involving both the crowns and the roots. Initial cephalometric analysis showed a skeletal Class III pattern, with a slight maxillary retrusion and a compensated proclination of the upper incisors. The patient's teeth were considered to be in the correct position; therefore, we decided to attempt treatment by correcting the transposition and using only orthodontic compensation of the skeletal Class III malocclusion. After 25 months of active orthodontic treatment, the patient had a Class I molar and canine relationship on both sides, with ideal overbite and overjet values. Her profile was improved, her lips were competent, and cephalometric evaluation showed acceptable maxillary and mandibular incisor inclinations. The final panoramic radiograph showed that good root parallelism was achieved. Two-year follow-up intraoral photography showed stable results.

  13. Comparative Study between the tongue shape and hyoid bone position in Angle Class III and Skeletal Class III Malocclusion and Those in Angle Class I Malocclusion%安氏Ⅲ类骨性Ⅲ类与安氏I类错牙合畸形舌体形态位置及舌骨位置的比较研究

    Institute of Scientific and Technical Information of China (English)

    袁小平; 朗么磋; 王昊

    2014-01-01

    目的:比较安氏Ⅲ类骨性Ⅲ类与安氏I类错牙合畸形舌体形态位置及舌骨位置。方法对46例患者(实验组安氏Ⅲ类骨性Ⅲ类26例,对照组安氏I类20例)拍摄头侧位X光片并在舌背涂抹硫酸钡糊剂,选择舌体及舌骨的17个点进行描记,对13个测量值进行分析。结果(1)安氏Ⅲ类骨性Ⅲ类错牙合畸形患者比安氏I类错牙合畸形患者舌尖位置偏前(O-T1)、舌根位置偏后(O-T7)、舌体中断偏低(O-T2,T3)有统计学意义(P<0.05);(2)安氏Ⅲ类骨性Ⅲ类错牙合畸形患者比安氏I类错牙合畸形患者舌长更长(ET)有显著统计学意义(P<0.01);(3)安氏Ⅲ类骨性Ⅲ类错牙合畸形患者比安氏I类错牙合畸形患者舌骨位置偏前下方(P<0.05,P<0.01)有统计学意义。结论安氏Ⅲ类骨性Ⅲ类与安氏I类错牙合畸形舌体形态位置及舌骨位置相比舌体形态位置及舌骨位置均有不同,安氏Ⅲ类骨性Ⅲ类错牙合畸形较安氏I类错牙合畸形舌长偏长,舌骨位置偏前下方。%Objective To compare the tongue shape and hyoid bone position in Angle class III and skeletal class III malocclusion with those in Angle class I malocclusion. Methods 46 cases were enrolled, including 26 cases of Angle class III and skeletal III maloc-clusion and 20 cases of Angle class I malocclusion;the dorsum of tongues were coated with barium sulfate and lateral X-ray of the head was taken;17 spots on the tongue and hyoid bone were selected and traced, and 13 measured values were analyzed. Results The tongue tips of the patients of Angle class III and skeletal class III malocclusion were positioned more anterior(O-T1), the hyoid more posterior (O-T7)and the tongue middle more inferior(O-T2,T3)compared with the patients of Angle class I malocclusion, the difference was of statistical significance (P<0.05); The tongues of patients of Angle class III and skeletal class III

  14. Má oclusão Classe III, com mordida cruzada posterior unilateral e assimetria facial Class III malocclusion with unilateral posterior crossbite and facial asymmetry

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    Silvio Rosan de Oliveira

    2010-10-01

    Full Text Available Este artigo relata o tratamento ortodôntico realizado em uma paciente adulta, com 36 anos de idade, portadora de um padrão esquelético e dentário de Classe III, com mordida cruzada posterior unilateral esquerda e assimetria mandibular, além de uma diferença relativamente grande entre máxima intercuspidação habitual (MIH e relação cêntrica (RC. O tratamento foi realizado com expansão dentária superior, contração dentária inferior e descruzamento anterior, eliminando a diferença entre MIH e RC. O resultado obtido foi pautado sobre um diagnóstico criterioso e um planejamento de compensação ortodôntica, sem intervenção cirúrgica nos maxilares, por solicitação da paciente. Este caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 5, ou seja, má oclusão com problema transverso, apresentando pelo menos um quadrante em cruzamento, como parte dos requisitos para obtenção do título de Diplomado pelo BBO.This article reports on the orthodontic treatment performed on a 36-year-old female patient with skeletal and dental Class III pattern, presenting with a left unilateral posterior crossbite and mandibular asymmetry, and a relatively significant difference between maximum intercuspation (MIC and centric relation (CR. The treatment was performed with maxillary dental expansion, mandibular dental contraction and anterior crossbite correction, eliminating the difference between MIC and CR. Results were based on careful diagnosis and planning of orthodontic compensation without surgical intervention in the maxilla, at the request of the patient. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as representative of Category 5, i.e., malocclusion with a transverse problem, presenting with a crossbite in at least one of the quadrants, as part of the requirements for obtaining the BBO Certificate.

  15. Evaluation of cephalometric changes in patients with class III malocclusion in mixed dentition period following face mask therapy and slow maxillary expansion

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    Ahmad Akhondi MS.

    2008-11-01

    Full Text Available "nBackground and Aim: Among different treatments of patients with Class III malocclusion , orthopedic protraction of maxilla has been known as an effective method in mixed dentition period. The aim of this study was to evaluate the cephalometric changes of Cl III patients in mixed dentition period following face mask therapy and slow maxillary expansion. "nMaterials and Methods: This was a before-after study which was conducted on 10 children in mixed dentition period, who had class III malocclusion and maxillary deficiency according to the Stiener and Mc Namara's analysis. The patients were all treated by protraction face mask and slow maxillary expansion. The cephalometric changes of maxilla , mandible and dental relations during the treatment were analyzed by Paired sample T Test. P<0.05 was considered as the level of significant. "nResults: The overjet increasement was 1.7mm. Co. ANS distance improvement was 5.6mm, Ptm.ANS distance increasing was 3mm, and ultimately improvement of Gf.s distance was 1.5mm which were all statistically significant (p<0.05. "nConclusion: Based on the results of this study, face mask therapy with slow maxillary expansion is able to improve the horizotal position of maxilla, in patients with Cl III malocclusion , in mixed dentition period.

  16. Management of skeletal class III malocclusion with a palatally impacted cuspid

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    Chris HN Chang

    2012-01-01

    Maintain the A-P position of the maxilla.Extrude lower molars to open the VDO by clockwise rotation to effectively retract the mandible relative to the maxilla.Retract the mandibular incisors.Correct the anterior X-bite and align the midlinesEstablish a normal overjet and overbite in a mutually protected, Class I occlusion.Retract lower lip to improve facial balance 0.022-in Damon D3® (standard torque and Inspire Ice® brackets ( Ormco were used. The simplicity of mechanics is illustrated

  17. Má oclusão Classe III de Angle, subdivisão direita, tratada sem exodontias e com controle de crescimento Angle Class III malocclusion, subdivision right, treated without extractions and with growth control

    Directory of Open Access Journals (Sweden)

    Sérgio Henrique Casarim Fernandes

    2010-12-01

    Full Text Available A Classe III de Angle é uma má oclusão caracterizada por discrepâncias anteroposteriores dentárias e faciais, normalmente acompanhadas por alterações esqueléticas, com componente genético associado. O diagnóstico precoce e correto e o tratamento adequado são de suma importância para promover o controle do crescimento e evitar recidivas. Este artigo relata o tratamento, executado em duas fases, de uma paciente do sexo feminino de 12 anos de idade, apresentando uma má oclusão de Classe III de Angle, subdivisão direita, com mordida cruzada anterior em máxima intercuspidação habitual (MIH e topo em relação cêntrica (RC, apresentando, ainda, falta de espaço na maxila, que foi tratada sem exodontias e com controle de crescimento. Esse caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 1, ou seja, uma má oclusão Classe III de Angle, tratada sem exodontias e com controle de crescimento, como parte dos requisitos para a obtenção do título de Diplomado pelo BBOAngle Class III malocclusion is characterized by anteroposterior dental and facial discrepancies usually accompanied by skeletal changes associated with a genetic component. Early, accurate diagnosis and appropriate treatment are of paramount importance to promote growth control and prevent relapse. This article reports the two-phase treatment of a female patient, aged 12 years, with an Angle Class III, subdivision right malocclusion with anterior crossbite in maximum intercuspation (MIC and end-on bite in centric relation, further presenting with lack of maxillary space. The case was treated without extractions and with growth control. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as representative of Category 1, i.e., Angle Class III malocclusion treated without tooth extractions, as part of the requirements for obtaining the BBO Diploma

  18. Strategic camouflage treatment of skeletal Class III malocclusion (mandibular prognathism) using bone-borne rapid maxillary expansion and mandibular anterior subapical osteotomy.

    Science.gov (United States)

    Seo, Yu-Jin; Lin, Lu; Kim, Seong-Hun; Chung, Kyu-Rhim; Nelson, Gerald

    2016-01-01

    This case report presents the camouflage treatment that successfully improved the facial profile of a patient with a skeletal Class III malocclusion using bone-borne rapid maxillary expansion and mandibular anterior subapical osteotomy. The patient was an 18-year-old woman with chief complaints of crooked teeth and a protruded jaw. Camouflage treatment was chosen because she rejected orthognathic surgery under general anesthesia. A hybrid type of bone-borne rapid maxillary expander with palatal mini-implants was used to correct the transverse discrepancy, and a mandibular anterior subapical osteotomy was conducted to achieve proper overjet with normal incisal inclination and to improve her lip and chin profile. As a result, a Class I occlusion with a favorable inclination of the anterior teeth and a good esthetic profile was achieved with no adverse effects. Therefore, the hybrid type of bone-borne rapid maxillary expander and a mandibular anterior subapical osteotomy can be considered effective camouflage treatment of a skeletal Class III malocclusion, providing improved inclination of the dentition and lip profile.

  19. Class III malocclusion with complex problems of lateral open bite and severe crowding successfully treated with miniscrew anchorage and lingual orthodontic brackets.

    Science.gov (United States)

    Yanagita, Takeshi; Kuroda, Shingo; Takano-Yamamoto, Teruko; Yamashiro, Takashi

    2011-05-01

    In this article, we report the successful use of miniscrews in a patient with an Angle Class III malocclusion, lateral open bite, midline deviation, and severe crowding. Simultaneously resolving such problems with conventional Class III treatment is difficult. In this case, the treatment procedure was even more challenging because the patient preferred to have lingual brackets on the maxillary teeth. As a result, miniscrews were used to facilitate significant asymmetric tooth movement in the posterior and downward directions; this contributed to the camouflage of the skeletal mandibular protrusion together with complete resolution of the severe crowding and lateral open bite. Analysis of the jaw motion showed that irregularities in chewing movement were also resolved, and a stable occlusion was achieved. Improvements in the facial profile and dental arches remained stable at the 18-month follow-up.

  20. The association of tongue posture with the dentoalveolar maxillary and mandibular morphology in Class III malocclusion: a controlled study.

    Science.gov (United States)

    Primozic, Jasmina; Farcnik, Franc; Perinetti, Giuseppe; Richmond, Stephen; Ovsenik, Maja

    2013-06-01

    The aim of the present study was to evaluate the association of tongue posture with the dentoalveolar maxillary and mandibular morphology in a group of Class III subjects in comparison to a group of Class I subjects. Twenty Class III subjects (9 males, 11 females, 19.2 ± 4.6 years) and 20 Class I subjects (6 males, 14 females, 17.4 ± 1.7 years) were included in the present study. Maxillary and mandibular morphology was defined by the intermolar and intercanine distances, at both the cusps and gingival levels, and by measuring surface area and volume of the palatal vault and mouth floor assessed on three-dimensional digital models. Tongue-to-palate distances were measured on lateral cephalograms. The groups were compared using the Mann-Whitney U-test and correlations between each morphological parameter and the tongue-to-palate distances were calculated using the Spearman correlation coefficient. The mandibular intermolar width at the gingival level was significantly greater in the Class III group (P Class III group (P Class III group (P = 0.01). The tongue-to-palate distances were generally greater, i.e. lower tongue posture, for the Class III subjects. Significant correlations were seen between tongue-to-palate distances in the posterior region with the area ratio (rho = 0.44, P Class III subjects and is associated with the dentoalveolar characteristics of the maxilla and mandible.

  1. The Effects of Maxillary Protraction with or without Rapid Maxillary Expansion and Age Factors in Treating Class III Malocclusion: A Meta-Analysis.

    Science.gov (United States)

    Zhang, Wei; Qu, Hong-Chen; Yu, Mo; Zhang, Yang

    2015-01-01

    We conducted a comprehensive meta-analysis of 12 studies to examine whether maxillary protraction face mask associated with rapid maxillary expansion (FM/RME) could be an effective treatment for Class III malocclusion and to evaluate the effect of timing on treatment response. Patients with a maxillary deficiency who were treated with FM with or without RME were compared with those who had an untreated Class III malocclusion. In both treatment groups, forward displacement of the maxilla and skeletal changes were found to be statistically significant. In addition, posterior rotation of the mandible and increased facial height were more evident in the FM group compared with the control group. However, no significant differences were observed between the early treatment groups and late treatment groups. The results indicated that both FM/RME and FM therapy produced favorable skeletal changes for correcting anterior crossbite, and the curative time was not affected by the presence of deciduous teeth, early mixed dentition or late mixed dentition in the patient.

  2. Orthopedic treatment of Class III malocclusion with rapid maxillary expansion combined with a face mask: a cephalometric assessment of craniofacial growth patterns

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    Daniella Torres Tagawa

    2012-06-01

    Full Text Available OBJECTIVE: The aim of this prospective study was to assess potential changes in the cephalometric craniofacial growth pattern of 17 children presenting Angle Class III malocclusion treated with a Haas-type expander combined with a face mask. METHODS: Lateral cephalometric radiographs were taken at beginning (T1 and immediately after removal of the appliances (T2, average of 11 months of treatment. Linear and angular measurements were used to evaluate the cranial base, dentoskeletal changes and facial growth pattern. RESULTS: The length of the anterior cranial base experienced a reduction while the posterior cranial base assumed a more vertical position at T1. Some maxillary movement occurred, there was no rotation of the palatal plane, there was a slight clockwise rotation of the mandible, although not significant. The ANB angle increased, thereby improving the relationship between the jaws; dentoalveolar compensation was more evident in the lower incisors. Five out of 12 cases (29.41% showed the following changes: In one case the pattern became more horizontal and in four cases more vertical. CONCLUSIONS: It was concluded after a short-term assessment that treatment with rapid maxillary expansion (RME associated with a face mask was effective in the correction of Class III malocclusion despite the changes in facial growth pattern observed in a few cases.

  3. The Effects of Maxillary Protraction with or without Rapid Maxillary Expansion and Age Factors in Treating Class III Malocclusion: A Meta-Analysis.

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    Wei Zhang

    Full Text Available We conducted a comprehensive meta-analysis of 12 studies to examine whether maxillary protraction face mask associated with rapid maxillary expansion (FM/RME could be an effective treatment for Class III malocclusion and to evaluate the effect of timing on treatment response. Patients with a maxillary deficiency who were treated with FM with or without RME were compared with those who had an untreated Class III malocclusion. In both treatment groups, forward displacement of the maxilla and skeletal changes were found to be statistically significant. In addition, posterior rotation of the mandible and increased facial height were more evident in the FM group compared with the control group. However, no significant differences were observed between the early treatment groups and late treatment groups. The results indicated that both FM/RME and FM therapy produced favorable skeletal changes for correcting anterior crossbite, and the curative time was not affected by the presence of deciduous teeth, early mixed dentition or late mixed dentition in the patient.

  4. Three-dimensional evaluation of facial morphology in children aged 5-6 years with a Class III malocclusion.

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    Krneta, Bojana; Primožič, Jasmina; Zhurov, Alexei; Richmond, Stephen; Ovsenik, Maja

    2014-04-01

    The aim of this study was to evaluate facial morphology in 25 Class III and 46 non-Class III children aged 5-6 years using three-dimensional (3D) laser imaging; 3D facial images were obtained, two average facial templates were constructed for the non-Class III male and female groups, each individual face was superimposed on the corresponding average template and group comparisons were evaluated (facial height, facial convexity, mandibular position and facial surface morphology). Differences between parameters were evaluated by using an analysis of variance and colour deviation maps. The results showed that Class III children had less mid-face prominence and a concave facial profile when compared to non-Class III children (P = 0.002 and P = 0.018). The position of the pg point in the z-axis just failed to reach statistical significance when comparing the two groups (P = 0.051). A vertical analysis showed no statistical significance between the groups, when evaluating middle (n-sn) and lower (sn-pg) facial height. Coincidence of the Class III faces to normal templates with a tolerance set as 0.5 mm was low (less than 30%). The soft tissue characteristics of a Class III face differ significantly from the non-Class III face in the mid-face region and in the facial profile. A 3D laser imaging method evaluated and identified morphological characteristics of Class III children in deciduous dentition, which could in the future become an important diagnostic tool in small children. The most important clinical advantage of this study is the non-invasiveness of the method.

  5. 安氏III类乳牙牙合的头影测量研究%Cephalometric study on Children with Class III malocclusion in the deciduous dentition

    Institute of Scientific and Technical Information of China (English)

    朱鲲; 王娟; 牛树强

    2015-01-01

    Objective To compare the Angle Class III occlusion in deciduous dentition with normal occlusion,to provide reference for the cause of Angle Class III malocclusion. Methods 29 children in deciduous dentition with Angle Class III occlusion were selected for a group,and 30 children in deciduous dentition with normal occlusion were classified in control group. Two groups are measured of sagittal and vertical skeletal analysis,alveolar bone height analysis and soft tissue analysis. Results In addition to the alveolar bone height there was no significant difference, the other three were significant differences.Sagittal direction:ANB (Class III group:- 1.6±2.30,normal 2.5±2.41), surface process angle (Class III group:- 0.77±3.72,normal group:7.5±4.47),Wits appraisal (Class III group:-3.52±3.36, normal group:0.54±1.91),and A to N- perpendicular (Class III group: - 3.35±2.65;normal group:0.59±2.71). Dentoalveolar measurements included U1 to NA (Class III group:13.52±6.34;normal group:8.46±3.2),IMPA (Class III group:80.04±5.40;normal group:85.97±6.07,and inter incisal angle (Class III group: 129.65±6.35;normal group:127.43±6.34). Soft tissue measurements included soft tissue convexity (Class III group:3.44±2.60;normal group:11.98±3.23),naso facial angle (Class III group:23.79±4.25;normal group:25.36±2.55), and upper lip to esthetic plane (Class III group: - 1.2±1.37;normal group:1.26±1.10). Conclusion Between children with Angle Class III malocclusion and those with normal craniofacial growth,there are signi?cant differences. Children with Angle Class III malocclusion should be early treated.%目的:比较安氏III类乳牙牙合与正常乳牙牙合的异同,为临床研究乳牙安氏III类牙合病因提供参考。方法:选取乳牙牙合安氏III类儿童29例,对照组组选取安氏I类正常牙合患儿30例,分别对两组的矢状面型、垂直骨面型、牙槽骨高度、软组织形态进行测量。结果:两组儿童除了在

  6. Effects of two alar base suture techniques suture techniques on nasolabial changes after bimaxillary orthognathic surgery in Taiwanese patients with class III malocclusions.

    Science.gov (United States)

    Chen, C Y-H; Lin, C C-H; Ko, E W-C

    2015-07-01

    A randomized controlled trial was designed to assess the effectiveness of two alar base cinch techniques on the changes in nasolabial morphology after bimaxillary orthognathic surgery. Sixty patients requiring a Le Fort I osteotomy to correct skeletal discrepancies were selected randomly to receive either conventional or modified alar base cinching during the intraoral wound closure procedure. Conventional cinching passed through nasalis muscle and anterior nasal spine. Modified cinching also passed through dermis tissue to increase the anchorage. Postoperative hard and soft tissue changes were evaluated using cone beam computed tomography and three-dimensional stereophotogrammetry at predefined time points. Forty-eight patients with a skeletal class III malocclusion were included. In the conventional group, there was an increase of 0.31 ± 1.31 mm in nasal width and an increase of 0.97 ± 1.60mm in columellar length. In the modified group, there was an increase of 0.81 ± 1.87 mm in the cutaneous height of the upper lip and a decrease of 0.76 ± 1.56 mm in lower prolabial width. Patients with an initial narrow nasal width, alar base width, and less vertical nostril show were more susceptible to a greater degree of change after surgery. Both alar base suture techniques are effective at controlling nasolabial form changes resulting from class III dual-jaw orthognathic surgery.

  7. Angle Class I malocclusion with anterior negative overjet

    OpenAIRE

    Paulo Ávila de Souza

    2016-01-01

    ABSTRACT This clinical case report describes the orthodontic treatment of an 8-year and 9-month old female patient with Angle Class I malocclusion, anterior crossbite and canine Class III relationship. Orthodontic treatment was carried out in two stages. The first one was orthopedic, while the second one included the use of a fixed appliance and the need for space gain for reshaping of maxillary lateral incisors. The two-stage treatment combined with multidisciplinary Restorative Cosmetic Den...

  8. Abordagem clínica não-cirúrgica no tratamento da má oclusão de Classe III Non-surgical approaches to Class III malocclusions treatment

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    Eustáquio A. Araújo

    2008-12-01

    Full Text Available A abordagem clínica não-cirúrgica da Classe III coloca-se entre os grandes desafios da Ortodontia e vem, desde sempre, gerando controvérsia entre clínicos e pesquisadores. Alguns defendem a tese de que o crescimento e o desenvolvimento do complexo craniofacial são determinados geneticamente e, portanto, inalteráveis. Para esses, a correção da grande maioria de casos de Classe III passará por intervenções orto-cirúrgicas, devendo a terapia ser realizada assim que cessar o período mais ativo do crescimento. Por outro lado, há aqueles que, mesmo concordando com o peso da hereditariedade na etiologia da Classe III, acreditam ser possível modificar o padrão e a direção do crescimento e, através de uma abordagem não-cirúrgica, minimizar a má oclusão ou até mesmo tratá-la com sucesso. Em face da controvérsia, quais seriam as possibilidades ortodônticas? Inúmeros são os relatos de que uma intervenção adequada, em momento adequado, acompanhada de um estudo do padrão familiar, pode, muitas vezes, minimizar o desenvolvimento de uma Classe III. Procedimentos selecionados com critério podem reduzir a indicação de intervenções cirúrgicas e proporcionar resultados positivos e duradouros. Há evidências clínicas e científicas de que algumas decisões terapêuticas podem mudar o curso de muitos prognósticos sombrios.Orthodontic management of the Class III malocclusion has been a constant challenge to the orthodontic profession and remains a controversial issue among clinicians and researches. Some support the belief that growth and size of the craniofacial complex are genetically predetermined and cannot be changed. They assume that the great majority of Class III cases are "untreatable" and that they are due to surgical intervention after growth has been completed. Even agreeing that heredity plays a major role in this type os deviation, others support the contention that the pattern and direction of growth can be

  9. Diagnóstico de má oclusão de Classe III por alunos de graduação Class III malocclusion diagnosis by graduation students

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    José Augusto Mendes Miguel

    2008-12-01

    Full Text Available OBJETIVO: verificar a capacidade de alunos de graduação diagnosticarem a má oclusão do tipo Classe III de Angle, assim como avaliar a possível indicação para tratamento ortodôntico e o momento ideal de iniciá-lo, levando em consideração as idades dentária e esquelética do paciente. MÉTODOS: a amostra foi composta por 138 alunos do último período de graduação de 10 faculdades de Odontologia do estado do Rio de Janeiro, avaliados por meio de questionários com perguntas fechadas. Foram-lhes apresentados fotografias e modelos de estudo de um paciente portador de má oclusão Classe III de Angle unilateral e, ainda, outras más posições dentárias. RESULTADOS: constatou-se facilidade por parte dos estudantes em identificar o desvio de linha média (n = 124 ou 90% e a mordida cruzada anterior (n = 122 ou 89%. Em contrapartida, aproximadamente metade da amostra (n = 63 ou 46% dos alunos foi capaz de reconhecer, no caso clínico, a existência da má oclusão Classe III de Angle unilateral. Apenas 46% deles (n = 63 identificaram a ausência precoce do dente decíduo. Quanto ao tratamento, quase a totalidade concordou com a sua necessidade, porém encontraram dificuldade em reconhecer o momento ideal da indicação ao especialista, com a finalidade de que este realize o tratamento ortodôntico. CONCLUSÃO: os estudantes terminam o curso de graduação com dificuldade no diagnóstico de Classe III e nem mesmo articulam idéias sobre um protocolo básico de tratamento para correção desta anormalidade.AIM: The aim of this article was to check the ability of undergraduate students to identify Class III malocclusion and also recognize the correct timing for referring them for orthodontic treatment, taking into consideration the patient's dental and skeletal ages. METHODS: The sample included 138 senior students of 10 Dental Schools in the State of Rio de Janeiro, which answered a written questionnaire with objective questions. It was

  10. Class II malocclusion occlusal severity description

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    Guilherme Janson

    2010-08-01

    Full Text Available OBJECTIVES: It is well known that the efficacy and the efficiency of a Class II malocclusion treatment are aspects closely related to the severity of the dental anteroposterior discrepancy. Even though, sample selection based on cephalometric variables without considering the severity of the occlusal anteroposterior discrepancy is still common in current papers. In some of them, when occlusal parameters are chosen, the severity is often neglected. The purpose of this study is to verify the importance given to the classification of Class II malocclusion, based on the criteria used for sample selection in a great number of papers published in the orthodontic journal with the highest impact factor. MATERIAL AND METHODS: A search was performed in PubMed database for full-text research papers referencing Class II malocclusion in the history of the American Journal of Orthodontics and Dentofacial Orthopedics (AJO-DO. RESULTS: A total of 359 papers were retrieved, among which only 72 (20.06% papers described the occlusal severity of the Class II malocclusion sample. In the other 287 (79.94% papers that did not specify the anteroposterior discrepancy severity, description was considered to be crucial in 159 (55.40% of them. CONCLUSIONS: Omission in describing the occlusal severity demands a cautious interpretation of 44.29% of the papers retrieved in this study.

  11. Effects of surgical correction of class III malocclusion on the pharyngeal airway and its influence on sleep apnoea.

    Science.gov (United States)

    Canellas, J V Dos S; Barros, H L M; Medeiros, P J D; Ritto, F G

    2016-12-01

    The objective of this study was to evaluate, through cone beam computed tomography, the immediate changes in pharyngeal airway space (PAS) after orthognathic surgery in class III patients, and to determine the influence of surgery on the development of obstructive sleep apnoea hypopnoea syndrome (OSAHS). A prospective study was conducted; 33 patients were divided into three groups: mandibular setback surgery (nine patients), bimaxillary surgery (18 patients), and maxillary advancement surgery (six patients). PAS measurements obtained pre- and postoperatively were compared using the t-test. All patients were assessed clinically for OSAHS before surgery and at 6 months postoperative using the Berlin questionnaire and a combined clinical assessment, which included the assessment of OSAHS symptoms, Epworth Sleepiness Scale score, and body mass index. Patients undergoing isolated mandibular setback surgery demonstrated a decrease in total PAS volume, in hypopharynx volume, and in minimum cross-sectional area of the pharynx immediately after surgery (P<0.05). The clinical analysis did not reveal signs or symptoms of OSAHS in any of the 33 patients. Although patients who underwent mandibular setback surgery alone demonstrated a volume reduction in the PAS and a decrease in minimum cross-sectional area, these reductions were not accompanied by signs or symptoms of OSAHS.

  12. Intervenção ortocirúrgica em paciente adolescente com acentuada displasia esquelética de Classe III Orthodontic-surgical treatment in youthful patient with severe skeletal Class III malocclusion

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    Andressa Otranto de Britto Teixeira

    2007-10-01

    Full Text Available INTRODUÇÃO: a má oclusão de Classe III é caracterizada por uma discrepância esquelética ântero-posterior, podendo ou não estar acompanhada de alterações verticais, mas comumente apresenta alterações transversais associadas. O aspecto facial fica comprometido nesses pacientes, sendo esse um dos fatores que os motivam a procurar o tratamento ortodôntico. Quando o paciente encontra-se na faixa de 8 a 10 anos de idade, uma abordagem precoce é indicada. Quando o paciente é adulto e o crescimento já cessou, o tratamento vai ser decidido entre a camuflagem ortodôntica e os procedimentos ortocirúrgicos clássicos. O problema quanto à decisão terapêutica está no paciente adolescente, com acentuadas Classes III esqueléticas, quando os procedimentos interceptativos não mais surtirão o efeito desejado e as alterações faciais são muito significativas. Ainda haverá crescimento e muitas vezes há comprometimento psicossocial ou funcional. OBJETIVO: propor uma abordagem cirúrgica precoce como alternativa de tratamento para esses pacientes, mesmo que uma segunda cirurgia seja necessária após o término do crescimento. DISCUSSÃO: para se propor essa terapia, vários critérios devem ser observados para que realmente o paciente tenha benefícios com esta intervenção precoce, como pouca discrepância intra-arco e possibilidade de preparo ortodôntico pré-cirúrgico rápido. CONCLUSÃO: deve-se ter ciência que um segundo tratamento ortocirúrgico provavelmente se fará necessário após o término do crescimento e que esse tipo de tratamento não deve ser empregado como rotina.INTRODUCTION: Class III malocclusion is characterized by an anterior-posterior skeletal discrepancy that may or may not be combined with vertical alterations, but it commonly presents transverse disharmony associated. The facial aspect is affected in these patients, which is one of the factors that motivate them to look for orthodontic treatment. For young

  13. Evolution of Class III treatment in orthodontics.

    Science.gov (United States)

    Ngan, Peter; Moon, Won

    2015-07-01

    Angle, Tweed, and Moyers classified Class III malocclusions into 3 types: pseudo, dentoalveolar, and skeletal. Clinicians have been trying to identify the best timing to intercept a Class III malocclusion that develops as early as the deciduous dentition. With microimplants as skeletal anchorage, orthopedic growth modification became more effective, and it also increased the scope of camouflage orthodontic treatment for patients who were not eligible for orthognathic surgery. However, orthodontic treatment combined with orthognathic surgery remains the only option for patients with a severe skeletal Class III malocclusion or a craniofacial anomaly. Distraction osteogenesis can now be performed intraorally at an earlier age. The surgery-first approach can minimize the length of time that the malocclusion needs to worsen before orthognathic surgery. Finally, the use of computed tomography scans for 3-dimensional diagnosis and treatment planning together with advances in imaging technology can improve the accuracy of surgical movements and the esthetic outcomes for these patients.

  14. Relation between Angle Class II malocclusion and deleterious oral habits

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    José Tarcísio Lima Ferreira

    2012-12-01

    Full Text Available INTRODUCTION: Oral habits may interfere on the growth and development of the stomatognathic system and orofacial myofunctional conditions, producing changes in the position of teeth in their dental arches. OBJECTIVE: The purpose of this study was to verify the presence of deleterious oral habits in individuals with malocclusion and see if there is a predominance of Class II malocclusion in these individuals. METHODS: The records of 140 patients treated at the Clinic of Preventive Orthodontics FORP-USP who had already completed treatment were randomly selected and analyzed. Their ages ranged from 6 to 10 years and 11 months. Associations were made between the presence or absence of deleterious oral habits, type and number of habits found in each individual and the type of malocclusion according to Angle classification. The statistical analysis used was the Chi-square test with a significance level of 5%. History of deleterious oral habits was found in 67.1% of individuals. RESULTS: The Class I malocclusion was most frequent (82.9%, followed by Class II malocclusion (12.1% and Class III (5%. CONCLUSION: There was a predominance of Class II malocclusion in individuals with a history of deleterious oral habits.INTRODUÇÃO: hábitos bucais podem interferir no crescimento e desenvolvimento do sistema estomatognático e nas condições miofuncionais bucofaciais, acarretando alterações no posicionamento dos dentes nas respectivas arcadas dentárias. OBJETIVO: o objetivo dessa pesquisa foi verificar a presença de hábitos bucais deletérios em indivíduos portadores de má oclusão e observar se existe predominância de má oclusão Classe II de Angle nesses indivíduos. MÉTODOS: foram selecionadas, aleatoriamente, e analisadas 140 fichas de pacientes atendidos na Clínica de Ortodontia Preventiva da FORP-USP, que já haviam recebido alta no tratamento. A faixa etária variou dos 6 anos a 10 anos e 11 meses. Foram realizadas associações entre

  15. Angle Class I malocclusion with anterior negative overjet

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    Paulo Ávila de Souza

    2016-04-01

    Full Text Available ABSTRACT This clinical case report describes the orthodontic treatment of an 8-year and 9-month old female patient with Angle Class I malocclusion, anterior crossbite and canine Class III relationship. Orthodontic treatment was carried out in two stages. The first one was orthopedic, while the second one included the use of a fixed appliance and the need for space gain for reshaping of maxillary lateral incisors. The two-stage treatment combined with multidisciplinary Restorative Cosmetic Dentistry allowed excellent esthetic and functional outcomes to be achieved. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as a requirement for the title of certified by the BBO.

  16. Skeletal class III camouflage by mandibular incisor extraction: A case report

    OpenAIRE

    Janardhanan Kumaresan; Tamizharasi Senthil Kumar; Senthil Kumar

    2014-01-01

    Treatment planning in orthodontics plays a key role in determining the successful treatment of any kind of malocclusion. Skeletal class III malocclusions are generally difficult to treat because of the complex nature of the skeletal and dental manifestations they produce. Mild to moderate skeletal class III malocclusions sometimes have an acceptable facial profile where orthodontic camouflage is possible. In this case report, camouflage of a mild skeletal class III is done by the extraction o...

  17. "Converting a bi-jaw surgery to a single-jaw surgery:" Posterior maxillary dentoalveolar intrusion with microimplants to avoid the need of a maxillary surgery in the surgical management of skeletal Class III vertical malocclusion

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    Abhisek Ghosh

    2016-01-01

    Full Text Available The management of a vertical skeletal Class III malocclusion with mandibular prognathism revolves around the protocol of bi-jaw surgery (maxillary LeFort I impaction and mandibular bilateral sagittal split osteotomy with setback. The maxillary surgery not only provides increased stability to the ultimate surgical outcome but also increases the amount by which the mandibular set back can be done, therefore aiding in greater profile improvement. With the need of maxillary surgery almost inevitable in treating such situations, the complexity and the increased discomfort associated with such surgery can never be ignored. Is it at all possible to convert a bi-jaw surgery into a single-jaw surgery with the aid of microimplants? With increasing number of patients being treated with microimplants for anterior openbite and gummy smiles, our idea was to incorporate this novel protocol in treating Class III vertical situations and therefore avoid the need of a maxillary surgery in treating such a situation, together with achieving optimum treatment outcome.

  18. Study of variations of the Bolton index in the Moroccan population depending on angle malocclusion class.

    Science.gov (United States)

    Zerouaoui, Mohamed Fadel; Bahije, Loubna; Zaoui, Fatima; Regragui, Salwa

    2014-06-01

    Many difficulties may arise during the finishing phase of orthodontic treatment on account of discrepancy between mandibular and maxillary tooth size. In 1958, Bolton devised the index that bears his name and enables possible tooth-size discrepancy to be diagnosed. Use of this index in practice has shown that it can vary depending on the different angle malocclusion classes. The aim of this work is to study variations of the Bolton index as a function of the malocclusion class in the Moroccan population, and to compare the results obtained with those of other populations. Ninety models were therefore selected in different groups of dental Class I, Class II and Class III malocclusions. The mesiodistal (MD) diameters of 12 maxillary and mandibular teeth were measured and the anterior and general Bolton indices were calculated. The results obtained show that there is no significant difference between the various groups of angle malocclusion classes, and that some other populations present results similar to those of the Moroccan sample.

  19. Early orthodontic intervention followed by fixed appliance therapy in a patient with a severe Class III malocclusion and cleft lip and palate.

    Science.gov (United States)

    Zhang, He; Deng, Feng; Wang, Huaqiao; Huang, Qianqian; Zhang, Yi

    2013-11-01

    This case report describes the treatment of a girl, age 11 years 10 months, with a cleft lip and palate and a postsurgical scar. The clinical examination showed a concave profile, a retrusive maxilla, an asymmetric face, severe dental crowding, a Class III dental relationship, and a complete dental crossbite. Maxillary expansion and distraction, chincap, and high-pull headgear were used to moderate the skeletal discrepancy. These approaches, combined with tooth extraction and fixed orthodontic appliances, finally established a functional and esthetic occlusal relationship, normal overjet and overbite, and a well-balanced facial appearance.

  20. Avaliação do processo estilóide em sujeitos com discrepância esquelética de Classe III = Evaluation of the styloid process in subjects with Class III malocclusion

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    Pinto, Paulo Rogério de Oliveira

    2008-01-01

    Full Text Available Objetivo: Esta pesquisa teve como objetivo avaliar a presença da ossificação e do comprimento médio dos ligamentos estilo-hióide e estilomandibular em pacientes portadores de maloclusão de Classe III. Metodologia: Foram realizados traçados em papel acetato posicionado sobre 45 radiografias panorâmicas, desde a parte inferior do conduto auditivo até o ápice do processo estilóide. As medidas foram obtidas por um único pesquisador, utilizando um paquímetro digital, em uma sala escura. Os processos estilóides com comprimento acima de 30 mm foram considerados aumentados. Os dados foram analisados estatisticamente pelo teste t-Student. Resultados: O valor médio de comprimento do processo estilóide do lado direito (38,18 mm e do lado esquerdo (35,50 mm não diferiram entre si, porém foram diferentes estatisticamente (P<0,05 do valor de normalidade relatado na literatura. Não houve associação entre aumento do comprimento do processo estilóide e idade dos pacientes. Conclusão: Os resultados sugerem um alongamento do processo estilóide nos pacientes com maloclusão de Classe III nesta amostra

  1. Class II malocclusion nonextraction treatment with growth control

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    Zilda Lúcia Valentim Assunção

    2014-12-01

    Full Text Available The present study reports a case of Angle Class II malocclusion treatment of a male growing patient with 10-mm overjet, excessive overbite and transverse maxillary deficiency. The case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, with DI equal to or greater than 10, as a requirement for the title of certified by the BBO.

  2. Studying the Prevalence and Etiology of Class II Subdivision Malocclusion Utilizing Cone-Beam Computed Tomography

    Science.gov (United States)

    2013-04-24

    II SUBDIVISION MALOCCLUSION UTILIZING CONE-BEAM COMPUTED TOMOGRAPHY A THESIS Presented to the Faculty of the Uniform Services University of...K_Paper _Article _Book _ Poster _Presentation _Other 6. Title: ’Studying the Prevalence and Etiology of Class II Subdivision Malocclusion Utilizing...of any copyrighted material in the thesis manuscript entitled : ’STUDYING THE PREVALENCE AND ETIOLOGY OF CLASS II SUBDIVISION MALOCCLUSION

  3. Prevalence of Malocclusion in Jaipur, India

    OpenAIRE

    Trehan, Mridula; Chugh, Vinay K; Sharma, Sunil

    2009-01-01

    A study was undertaken to determine the prevalence of malocclusion in Jaipur city, India. A total of 700 subjects, in the age group of 16-26 years were divided into five groups of normal occlusion, Angle’s Class I, Class II Div 1, Class II Div 2 and Class III malocclusion. The results revealed that the prevalence of malocclusion was 66.3%, with the majority of them having Class I malocclusion (57.9%), while the prevalence of Class III malocclusion was found to be the least (1.4%). There was n...

  4. A Cephalometric Study on the Relationship between the Occlusal Plane, Ala-Tragus and Camper’s Lines, in Patients with Angle’s Class III Malocclusion

    Directory of Open Access Journals (Sweden)

    F. Rostamkhani

    2005-06-01

    Full Text Available Statement of Problem: Considering the importance of the occlusal plane orientation in complete denture prostheses, a study was conducted on the relationship between this plane with ala-tragus and Camper’s lines in soft tissue among individuals with class IIImalocclusion, in Mashhad School of Dentistry.Purpose: The aim of the present study was to define the best soft tissue index by which the location and inclination of the occlusal plane in complete dentures could be established.Materials and methods: The participants consisted of 13 males with Angle’s class III occlusal relationship. Radiopaque markers were attached to the intended points on soft tissue and then standard lateral cephalograms were obtained from each subject.The angles between the following lines were measured: Occlusal line (OL, Camper's line (ala-porion, AT1 (ala-superior border of tragus, AT2 (ala- mid-tragus and AT3 (ala-inferior border of tragus.Results: The mean values and standard deviations calculated from the measured variables are as follows: OL-^AT1, 5.65 (3.95 degrees; OL- ^AT2, 3.19 (2.45 degrees;OL- ^AT3, 2.92 (2.42 degrees and OL- ^Camper, 8.5 (3.83 degrees. Comparison of the results by the ANOVA test exhibited a significant difference (F=3.7, P=0.05. Asthe OL^-AT3 angle had the lowest value, the occlusal line had a stronger tendency to be parallel to the AT3 line.Conclusion: According to the present study, the inferior border of the tragus is suggested as the posterior point for ala-tragus line orientation.

  5. Early class III management in deciduous dentition using reverse twin block

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    S S Sargod

    2013-01-01

    Full Text Available Class III malocclusion poses a challenging dilemma for the clinician because these children have of growth patterns that differ from that of children with class I malocclusion. The mandible grows more rapidly than the maxilla, exacerbating the class III malocclusion as the child go through adolescence. Ever since Clark described a version of the twin block, it has steadily gained popularity in the management of early class III malocclusion in children. However, not many cases are reported in the literature on its use in deciduous dentition. This article tries to provide an insight into the reverse twin block appliance and reports two cases of early class III malocclusion treated using reverse twin block.

  6. Treatment of Class II Division 1 Malocclusion using Cervical Headgear

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    Priska Lestari Hendrawan

    2013-07-01

    Full Text Available Class II division 1 malocclusions have many variation and treatment options. Choosing the right treatment begins with a correct diagnosis. The aim of this article is to describe treatment of Class II division 1 malocclusion in a growing patient using combined cervical headgear and non-extraction fixed orthodontic therapy. Class I molar and canine relationship was achieved with normal overbite and overjet. There is improvement in jaw relationship and facial profile. This correction was achieved by downward displacement and inhibition of the forward growth of maxilla with favorable growth of mandible, upper molar distalization and retraction of upper incisors from cervical headgear use. There was neither downward rotation of the mandible nor maxillary first molar extrusion. Treatment time, favorable mandibular growth pattern and patient compliance proved to be determining factors in the success of this treatment.DOI: 10.14693/jdi.v16i3.106

  7. Analysis of skeletal Class III malocclusion treated by rapid maxillary expansion with occlusal pad and maxillary protraction%上颌前方牵引结合快速扩弓治疗III类错牙合畸形

    Institute of Scientific and Technical Information of China (English)

    安厚鹏; 赵畅; 闵丽娜; 刘莉; 韩龙

    2013-01-01

    Objective:To evaluate the effects of Class III malocclusion in the permanent dentition treated by combined rapid maxillary expansion and maxilary protraction. Methods:treated by combined rapid maxillary expansion and maxilary protraction. 20 patients treated by combined rapid maxillary expansion and maxilary protraction.Lateral cephalometric radiography were used to quantify the hard tissues changes before and after treatment..Results:The profile improved more than half ayear in protraction treated group.And it was more increased maxillaryand less reduced mandibular basic. Conclusion:The main changea in the maxillary protraction combined rapid maxillary expansion treated group were accelerate forward growth of the maxillary.%目的评价上颌前方牵引结合快速扩弓治疗I I类错牙合畸形的临床疗效。方法 将患者分成2组,第一组采用前方牵引器加快速扩弓治疗I I类错牙合畸形,第二组单纯采用前方牵引器治疗I I类错牙合畸形,治疗前后通过X片进行测量分析。结果 实验组矫治后上颌前移明显,下颔基本无明显后移,结果优于对照组(p<0.05)。结论 前方牵引加快速扩弓对上颌骨组织影响较大,对治疗青少年骨性反牙合效果显著。

  8. Dentofacial characteristics of patients with Angle Class I and Class II malocclusions

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    Rogério Lacerda dos Santos

    2012-04-01

    Full Text Available OBJECTIVE: The present study assessed some cephalometric measurements of the soft tissue profile in order to observe the behavior of facial convexity in patients with Class I, Class II division 1, and Class II division 2 malocclusions. METHODS: One hundred and thirty pre-treatment teleradiographs of Caucasian patients aged 10-16 years (mean age of 12.6 years were selected for study and divided into 3 groups. The cephalometric measurements used in the present study were the following: H.SN, Cx, NLA, MLA, UL-SUL-S, LL-S, IMPA, and 1-SN. Analysis of variance and Tukey's test were applied for measurements H.SN, Cx, IMPA, 1-SN, MLA, and NLA, whereas Kruskal-Wallis and Dunn's tests were applied for UL-S and LL-S. RESULTS: The results showed statistically significant differences for the measurements H.SN, Cx, UL-S, and IMPA between Groups I, II-1 and II-2 (p < 0.05. Measurements LL-S and MLA showed statistically significant difference between Groups I and II-1 only (p < 0.05. On the other hand, no statistically significant differences were found for measurement NLA among the 3 groups (p < 0.05. CONCLUSION: Regarding facial characteristics expressed by measurements H.SN, Cx, and UL-S, one could conclude that Class II division 1 and Class II division 2 malocclusions, both differed from Class I malocclusion. In addition, Class II division 1 malocclusion was found to have facial characteristics expressed by MLA, which differentiate it from the Class II division 2 and Class 1 malocclusions. Class I, Class II division 1 and Class II division 2 malocclusions showed no difference in facial characteristics expressed by the measurement NLA, and measurement LL-S was directly related to eversion of the lower lip.

  9. Análise da deflexão, do comprimento anterior e posterior da base do crânio, em indivíduos dolicofaciais, com má oclusão de Classe III esquelética Analysis of deflection, anterior and posterior length of cranial base in dolichofacial individuals, with skeletal Class III malocclusion

    Directory of Open Access Journals (Sweden)

    Fernando Antonio Gonçalves

    2006-08-01

    Full Text Available OBJETIVO: avaliar três grandezas cefalométricas: S-N.S-Ar (ângulo sela, S-N e S-Ar, segundo a análise de Jarabak. METODOLOGIA: foram utilizadas telerradiografias cefalométricas em norma lateral de 12 indivíduos dolicofaciais com má oclusão esquelética de Classe III, sendo seis indivíduos do gênero masculino e seis do gênero feminino, com média de idade de 27,2 anos. Os resultados foram comparados com os intervalos considerados normais para cada grandeza. Para a análise estatística foi utilizado o teste t de Student, com nível de significância de 5%. RESULTADOS E CONCLUSÕES: embora os resultados não apresentassem diferenças estaticamente significantes, mostraram uma tendência de valores mais baixos que o intervalo considerado normal, para o ângulo sela e para S-N.AIM: to evaluate three cephalometric measures: S-N.S-Ar, S-N and S-Ar, according to Jarabak's analysis. METHODS: using cephalometric teleradiographies in a lateral pattern in 12 dolichofacial individuals with skeletal Class III malocclusion, being six individuals of male gender and six of female gender, having a mean age of 27,2 years. The results have been compared to the intervals considered normal for each measure. For the statistical analysis, it was used the Student's "t" test, with a significance level set on 5%. RESULTS AND CONCLUSION: although the results would have not showed statistically significant differences, S-N.S-Ar and S-N have showed a trend of more low values than the interval considered normal.

  10. Skeletal class III camouflage by mandibular incisor extraction: A case report

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    Janardhanan Kumaresan

    2014-01-01

    Full Text Available Treatment planning in orthodontics plays a key role in determining the successful treatment of any kind of malocclusion. Skeletal class III malocclusions are generally difficult to treat because of the complex nature of the skeletal and dental manifestations they produce. Mild to moderate skeletal class III malocclusions sometimes have an acceptable facial profile where orthodontic camouflage is possible. In this case report, camouflage of a mild skeletal class III is done by the extraction of a single mandibular incisor, which helped in maintaining the profile of the patient and also in the correction of crowding in the mandibular anterior region.

  11. Class I malocclusion with anterior crossbite and severe crowding

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    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.

  12. Class II malocclusion therapy using fixed orthodontic appliance

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    Škufca Bojan

    2007-01-01

    Full Text Available Background. Depending on the indication, and the age of a patient, class II division I malocclusion can be treated by a fixed or mobile orthodontic appliance, with or without teeth extraction. Case report. A treatment of a male patient, 15 years old, with dentoalveolar class II division I was described. On the base of clinical findings, study case analysis, analysis of orthopan and profile cephalogram, there were class II division I with protrusion of frontal teeth and mild crowding in lower jaw assessed. The patient was treated by fixed orthodontics appliances (SWA Roth .022" in both jaws for 18 months, with the retention period of the same length. Conclusion. Fixed ortodontic appliances are necessary when bodily movement of the teeth is indicated - in this case for cuspids distalization and retraction of incisors.

  13. An Investigation of Craniocervical Posture in Class II & Class III Skeletal Patients

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    T. HoseinZadeh-Nik

    2005-02-01

    Full Text Available Statement of Problem: Craniocervical Posture is a factor in the development and function of Craniofacial Structure. Previous studies of different samples have demonstrated associations between craniocervical posture and craniofacial morphology.Purpose: This study aimed lo examine whether any significant association is evident or not between craniocervical posture and the occurrence of Class il & Class III skeletal malocclusions.Materials and Methods: A sample of 76 subjects with Class II & Class III skeletal malocclusion aged 9-i 1 and>18 years were selected. None of them had received orthodontic treatment. Lateral cephalometric radiographs were taken in natural head position (NHP, and craniocervical and craniohorizental angels were traced and determined for analysis of craniocervical posture. Results: According to the craniocervical posture, most class II skeletal patients have flexed heads and class MI skeletal patients have extended heads, as a result malocclusion in these patients seems to become more severe. With increase in age. class II skeletal patients have more flexed their heads and malocclusion become more severe, while with increase in age in class ill skeletal patients, their heads become extended and once again malocclusion thought lo be more severe. In class II skeletal patients, craniocervical posture has a significant correlation with the vertical growth pattern, but shows little correlation with the horizontal growth pattern. In class 111 skeletal patients, craniocervical posture shows no correlation to any of the vertical & horizontal growth patterns, of course the mean of vertical angles is less in these patients and probably in order to make these relation significant in Class III skeletal patients there is need for more samples, in class II & class III skeletal patients, the amount of Na.prep-point A and pog-Na.prep with craniocervical posture shows a significant correlation. Conclusion: Consideration of craniocervical

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

    Science.gov (United States)

    Barreto, Gustavo Mattos

    2013-01-01

    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.

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

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    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.

  16. Treatment of Class III with Facemask Therapy

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    Snigdha Pattanaik

    2016-01-01

    Full Text Available Class III malocclusion is one of the most difficult problems to treat in the mixed dentition. It has a multifactorial etiology involving both genetic and environmental causes. The dental and skeletal effects of maxillary protraction with a facemask are well documented in several studies. Although treatment in the late mixed or early permanent dentition can be successful, results are generally better in the deciduous or early mixed dentition. The following case shows early treatment of a young patient with severe sagittal and transverse discrepancy of the maxilla and mandible, using a facemask.

  17. Early Intervention in Skeletal Class II and dental Class II division I malocclusion

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    Zeeshan Iqbal Bhat

    2013-01-01

    Full Text Available A Class II malocclusion may occur as a result of mandibular deficiency, maxillary excess, or a combination of both. However, the most common finding is mandibular skeletal retrusion. The use of functional jaw orthopedics, at the right time during growth, can ultimately result in malocclusion patients achieving an excellent functional occlusion, a broad beautiful smile, a full face with a beautiful jaw line, and profile. Functional jaw orthopedic (FJO appliances are designed to encourage adaptive skeletal growth by maintaining the mandible in a corrected forward position. The activator developed by Andresen is one of the most widely used for this purpose. A 12-year-old boy with skeletal Class II malocclusion and dental Class II div I malocclusion, a low mandibular plane angle was treated with growth modulation using an activator followed by molar distalization using fixed orthodontics for detailing of the occlusion. The major effects of the activator treatment in this case have been due to increase in condylar growth and also an increase in mandibular base length. Further, non-extraction fixed orthodontic treatment for proper interdigitation of the dentition also helped to maintain the stability of the satisfactory results achieved.

  18. 两种不同拔牙方式矫治成人骨性反牙合的硬软组织改变的对比研究%Study on two different extraction methods for adult skeletal Class III malocclusion of the hard and soft tissue contrast

    Institute of Scientific and Technical Information of China (English)

    宁芳; 段银钟; 袁东辉

    2015-01-01

    Objective:To investigate the hard and soft tissue changes of single mandibular extraction with bimaxillary extraction orthodontic treatment of adult skeletal Class III malocclusion. Method:adult skeletal Class III malocclusion pa-tients with 31 cases,the extraction of four premolars in 13 cases(group A),single extraction of mandibular two premolars in 18 cases (group B). Application of X-ray cephalometric technique on the hard and soft tissue changes before and after treatment was measured,the measurement results were analysis. Result:there was no significant difference on SNA,SNB and ANB in two groups before and after treatment. Changes of lower anterior teeth and lip retraction in group A were more prominent,also the facial profile changes were significantly more than group B. Conclusion:single lower extraction mode for mild to moderate skeletal Class III cases with no crowd or mild crowd in the maxillary;bimaxillary extraction model suitable for maxillary with moderate or severe congestion in skeletal Class III malocclusion patients.%目的:探讨下颌单颌拔牙与双颌拔牙矫治成人骨性反牙合的硬软组织改变的差异。方法:选取成人骨性反牙合患者31例,其中拔除4个前磨牙矫治(甲组)13例,下颌单颌拔除2个前磨牙矫治(乙组)18例。应用X线头影测量对矫治前后的硬软组织变化进行测量。结果:两组SNA、SNB、ANB矫治前后的变化无明显差异。甲组下切牙内收与下唇的变化更为显著,下唇凸度明显减小,甲组面型侧貌改变较乙组更为显著。结论:单颌拔牙模式适用于上颌无拥挤或轻度拥挤的轻中度骨性反牙合患者;双颌拔牙模式适用于上颌伴中重度拥挤的中度骨性反牙合患者。

  19. 骨性Ⅲ类错牙合体分段长轴倾斜方向的一致性评价%An evaluation of the consistency with the inclined direction of different part of the teeth in skeletal class III malocclusion

    Institute of Scientific and Technical Information of China (English)

    刘娟; 贾莹; 杨桦; 张军梅

    2016-01-01

    目的:通过分段测量骨性Ⅲ类错牙合畸形患者上下牙列牙弓内所有牙齿(除第三磨牙)的轴倾角和转矩角,评价牙冠、牙根及全牙位置指标间的关系。方法选取符合纳入标准的29例成人骨性Ⅲ类错牙合患者,拍摄CBCT并收集其Dicom数据,利用Invivo5.1软件对上、下颌各牙的牙冠、牙根、全牙的转矩角和轴倾角进行测量。结果(1)骨性Ⅲ类错牙合,上、下牙列冠、根及全牙轴倾角一致性较好,两两比较,P>0.05。(2)骨性III类错牙合,在全牙列的转矩角中,上牙列冠、根及全牙的一致性较好,两两比较, P>0.05,而下牙列除磨牙外所有牙齿冠、根倾斜存在统计学差异,P0.05。结论(1)骨性Ⅲ类错牙合牙冠的倾斜角度与牙根或全牙的倾斜角度的一致性不高,可能存在牙体位置判别误差;(2)牙根倾斜程度与全牙倾斜程度较一致。%Objective To investigate the relationship among the crown, root and the whole tooth position and to provide technical and data support for the future in-depth study. Methods 29 adult skeletal Class III malocclusion patients who met the inclusion criteria were selected. They all were shot Cone-beam CT (CBCT)and the DICOM data were collected. The tilt angle and torque angle of all teeth (except the third molar) in the upper and lower jaws in skeletal Class III were measured respectively by the software Invivo5.1. Results (1) In skeletal Class III malocclusion, there was a good consistency among the tooth crown, root and the whole tooth tip angles in the upper and lower jaws(P>0.05). (2) In skeletal Class III malocclusion, there was a good consistency among the upper teeth crown, root and the whole teeth torque angles(P>0.05). However there were great differences between the crown and the root torque angles in lower teeth except for the first molar(P0.05). Conclusions (1) In skeletal Class III malocclusion, there is low consistency between the

  20. Stability of class II subdivision malocclusion treatment with 3 and 4 premolar extractions

    OpenAIRE

    2014-01-01

    Background The purpose of this study was to compare the occlusal stability of class II subdivision malocclusion treatment with 3 and 4 first premolar extractions. A sample of 156 dental casts from 52 patients with class II subdivision malocclusion was divided into two groups according to the extraction protocol. Group 1 comprised 24 patients treated with 3 premolar extractions and group 2 included 28 patients treated with 4 premolar extractions. Methods Peer assessment rating (PAR) indexes we...

  1. 骨性安氏Ⅲ类错牙合患者不同垂直骨面型下颌联合高度差异的临床研究%Research of symphysis height among Class III malocclusion patients with different facial vertical skeletal patterns

    Institute of Scientific and Technical Information of China (English)

    牛磊; 郑颖; 刘奕

    2015-01-01

    Objective To compare the symphysis height among Class III malocclusion patients with different facial vertical skeletal patterns. Methods Incisor mandibular plane angle (IMPA) and symphysis height (LH) were measured in 115 lateral cephalometric x-rays of adult patients without prior orthodontic treatment. Results Incisor mandibular plane angle (IMPA) and symphysis height (LH)values showed significant differences between Class III malocclusion patients with different facial vertical skeletal patterns.Variations in the mandibular plane have a negative correlation with IMPA and a positive correlation with LH. Conclusion An increased trend of long-faced in Class III malocclusion led to variable-length of symphysis height and more lingual inclination of mandibular incisor.%目的:比较不同的垂直骨面型的骨性安氏Ⅲ类错牙合患者下颌联合高度的差异。方法:在未做过正畸治疗的115例患者的头颅侧位片上测量下中切牙-下颌平面角(incisor mandibular plane angle,IMPA)以及下颌联合高度(symphysis height,LH),比较不同垂直骨面型的骨性安氏Ⅲ患者的下颌牙槽代偿和下颌联合高度的差异。结果:下颌联合高度和下中切牙-下颌平面角在不同垂直骨面型的安氏Ⅲ类患者中存在明显差异。在骨性安氏Ⅲ错牙合中,下颌联合高度(LH)与下颌平面角呈正相关,下中切牙-下颌平面角(IMPA)与下颌平面角呈负相关。结论:骨性安氏Ⅲ类错牙合患者长面型的趋势导致下颌联合变长,下前牙代偿性舌倾随着长面型的趋势加重。

  2. Occlusal rehabilitation of pseudo-class III patient.

    Science.gov (United States)

    Cardoso, Antônio Carlos; Ferreira, Cimara Fortes; Oderich, Elisa; Pedroso, Moira Leão; Wicks, Russell

    2015-01-01

    To treat a patient with anterior crossbite, the clinician should first assess if it is a genuine class III or a pseudo-class III malocclusion. Cephalometric analysis is important; however, registering a patient's centric relation (CR) is simple, quick, and costless and can play a decisive role in a differential diagnosis for this type of patient profile. This clinical report depicts a patient clinically diagnosed as class III. After mandible manipulation in CR, it was noted that the patient in question was a pseudo-class III. The treatment was based on the pseudo-class III diagnosis. Therefore, the patient was rehabilitated by occlusal adjustments and conventional and implant-supported prostheses and without the need for invasive orthognathic surgery.

  3. Early class III occlusal tendency in children and its selective management

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    Kapur A

    2008-09-01

    Full Text Available Class III malocclusion may develop in children as a result of an inherent growth abnormality, i.e., true class III malocclusion, or as a result of premature occlusal contacts causing forward functional shift of the mandible, which is known as pseudo class III malocclusion. These cases, if not treated at the initial stage of development, interfere with normal growth of the skeletal bases and may result in severe facial deformities. The treatment should be carried out as early as possible with the aim of permitting normal growth. This paper deals with the selection of an appropriate treatment approach from the various current options available for early intervention in children developing class III occlusal tendencies; the different clinical features are depicted in the three case reports.

  4. Anomalia de Classe III

    OpenAIRE

    2014-01-01

    Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária Introdução: A anomalia de classe III, é uma má oclusão que afeta os indivíduos psicologicamente, pois hoje em dia, a estética é socialmente valorizada. Deste modo, o diagnóstico deve ser executado precocemente para que os indivíduos portadores desta anomalia, possam ser acompanhados desde criança, pelos profissionais área da Medicina...

  5. The long term stability of skeletal class III malocclusion after orthodontic-surgery:A meta-analysis%正畸正颌联合矫治骨性 III 类错牙合软硬组织稳定性的 Meta 分析

    Institute of Scientific and Technical Information of China (English)

    白洋; 邓梦旋; 袁小平

    2015-01-01

    目的:采用 Meta 分析方法评价正畸正颌联合矫治骨性 III 类错�软硬组织的稳定性。方法:计算机检索 Cochrane Library、PubMed、Medline、CNKI、万方等中外文数据库中符合要求的随机对照试验、半随机对照试验、临床病例对照试验的文献,检索日期截止2013-12-31。按照纳入、排除标准,由2名经过系统评价专业培训的研究者对纳入文献进行严格的质量评价,提取中、高等质量文献的数据资料。然后采用 RevMan 5.2软件进行 Meta 分析。结果:最终纳入4篇文献,共178例患者,均为临床病例对照试验(CCT)。Meta 分析结果示:硬组织稳定性:SNA(WMD =-0.58,95%CI[-1.18,0.02])、SNB (WMD =0.25,95%CI[-0.42,0.91])、ANB(WMD =-0.70,95%CI[-1.44,0.04])、MP-SN(WMD =0.39,95%CI [-0.25,1.04]),术后与术后3年差异无统计学意义,A 点保持相对稳定位置,B 点较术后有复发;软组织稳定性:术后与术后3年患者的软组织总体上保持稳定,仅下唇突度术后3年有所增大,显示其有一定的复发。结论:骨性 III 类错�患者经正畸联合双颌手术治疗后,软硬组织基本保持了长期的稳定性,仅下颌有一定的向前复发,下唇突度有所增大。%Objective:To analyze the long term stability of the hard and soft tissues of the skeletal class III malocclusion after ortho-dontic-surgery by Meta-analysis.Methods:The randomized controlled trials(RCT),quasi-randomized controlled trials and clinical case-control trials(CCT)about the long-term stability of skeletal class III malocclusion after orthodontic-surgery was collected from Co-chrane Library,PubMed,Medline,CNKI,VIP and Wanfang databases from inception to December 31,2013 by literature search.Two professionally trained reviewers evaluated the quality of the screened literatures,scored literatures with the NOS

  6. Factors affecting buccal corridor space in Angle′s Class II Division 1 malocclusion

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    Rashmi Bhat

    2014-01-01

    Full Text Available Background and Objectives: Buccal corridor space has been thought of primarily in terms of maxillary width, but there is also evidence that they are heavily influenced by the antero-posterior position of maxilla. The present study was undertaken with an aim of evaluating and comparing the dental and skeletal factors related to buccal corridor space in individuals having Class I and Class II Division 1 malocclusions. Materials and Methods: A total of 80 subjects of which 40 were males and 40 were females in the age group of 20-30 years were selected as per inclusion criteria and were grouped as Group I having Class I malocclusion and as Group II having Class II malocclusions based on angle ANB. 12 linear and 2 angular cephalometric measurements and 4 study cast measurements were used to correlate with the buccal corridor linear ratio (BCLR, calculated on smile photograph using the Adobe Photoshop 7.0 software (Adobe Systems Inc., San Jose, California, USA. The data obtained was statistically evaluated using independent t-test and multiple linear regression analysis. Result: Buccal corridor space is larger in individuals with Class II Division 1 malocclusion when compared with individuals with Class I malocclusions. There exists a significant difference in buccal corridor space between males and females. Conclusion: The present study helps in establishing the correlation between certain factors and the amount of buccal corridor space in individuals having skeletal Class II pattern.

  7. Class III treatment using facial mask: Stability after 10 years

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    Adilson Luiz Ramos

    2014-10-01

    Full Text Available Early Class III malocclusion treatment may not have long-term stability due to mandibular growth. Although some features of this malocclusion point to a better prognosis, it is practically impossible for the orthodontist to foresee cases that require new intervention. Many patients need retreatment, whether compensatory or orthodontic-surgical. The present study reports the case of a Class III patient treated at the end of the mixed dentition with the use of a face mask followed by conventional fixed appliances. The case remains stable 10 years after treatment completion. It was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as a requirement for the title of certified by the BBO.

  8. Angle Class I malocclusion treated with lower incisor extraction

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    Vanessa Leal Tavares Barbosa

    2013-06-01

    Full Text Available In planning orthodontic cases that include extractions as an alternative to solve the problem of negative space discrepancy, the critical decision is to determine which teeth will be extracted. Several aspects must be considered, such as periodontal health, orthodontic mechanics, functional and esthetic alterations, and treatment stability. Despite controversies, extraction of teeth to solve dental crowding is a therapy that has been used for decades. Premolar extractions are the most common, but there are situations in which atypical extractions facilitate mechanics, preserve periodontal health and favor maintenance of the facial profile, which tends to unfavorably change due to facial changes with age. The extraction of a lower incisor, in selected cases, is an effective approach, and literature describes greater post-treatment stability when compared with premolar extractions. This article reports the clinical case of a patient with Angle Class I malocclusion and upper and lower anterior crowding, a balanced face and harmonious facial profile. The presence of gingival and bone recession limited large orthodontic movements. The molars and premolars were well occluded, and the discrepancy was mainly concentrated in the anterior region of the lower dental arch. The extraction of a lower incisor in the most ectopic position and with compromised periodontium, associated with interproximal stripping in the upper and lower arches, was the alternative of choice for this treatment, which restored function, providing improved periodontal health, maintained facial esthetics and allowed finishing with a stable and balanced occlusion. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, as part of the requirements for obtaining the BBO Diplomate title.

  9. Angle Class I malocclusion treated with lower incisor extraction.

    Science.gov (United States)

    Barbosa, Vanessa Leal Tavares

    2013-01-01

    In planning orthodontic cases that include extractions as an alternative to solve the problem of negative space discrepancy, the critical decision is to determine which teeth will be extracted. Several aspects must be considered, such as periodontal health, orthodontic mechanics, functional and esthetic alterations, and treatment stability. Despite controversies, extraction of teeth to solve dental crowding is a therapy that has been used for decades. Premolar extractions are the most common, but there are situations in which atypical extractions facilitate mechanics, preserve periodontal health and favor maintenance of the facial profile, which tends to unfavorably change due to facial changes with age. The extraction of a lower incisor, in selected cases, is an effective approach, and literature describes greater post-treatment stability when compared with premolar extractions. This article reports the clinical case of a patient with Angle Class I malocclusion and upper and lower anterior crowding, a balanced face and harmonious facial profile. The presence of gingival and bone recession limited large orthodontic movements. The molars and premolars were well occluded, and the discrepancy was mainly concentrated in the anterior region of the lower dental arch. The extraction of a lower incisor in the most ectopic position and with compromised periodontium, associated with interproximal stripping in the upper and lower arches, was the alternative of choice for this treatment, which restored function, providing improved periodontal health, maintained facial esthetics and allowed finishing with a stable and balanced occlusion. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements for obtaining the BBO Diplomate title.

  10. MAXILLARY INCISOR TRAUMA IN PATIENTS WITH CLASS II DIVISION 1 DENTAL MALOCCLUSION: ASSOCIATED FACTORS

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    Elif Yaman DOSDOĞRU

    2017-01-01

    Full Text Available Purpose: The aim of this study was to assess the association between the presence of maxillary incisor trauma (MIT with age, gender, dentition type, the degree of overjet (OJ, lip form, respiratory type and dental arch form in patients with Class II division 1 dental malocclusion. Subjects and Methods: 256 patients (mean age: 15.80 ± 2.2 were included in this study. The patients’ gender, dentition type, superior lip form, dental arch form and respiratory type were recorded. Participants were divided into four groups according to the severity of OJ: 3.5 mm III ≤9mm, 9 mmClass II division 1 malocclusion.

  11. Maxillary first molar extraction in Class II malocclusion : Follow-up studies on treatment effects

    NARCIS (Netherlands)

    Livas, Christos

    2015-01-01

    This PhD research investigated treatment effects of extraction of one and two maxillary first molars in Class II subdivision and Class II/1 malocclusion cases respectively from a longer time perspective. Private practice records were scrutinized to evaluate aspects of a treatment technique combining

  12. Morphometric analysis of treatment effects of bone-anchored maxillary protraction in growing Class III patients

    Science.gov (United States)

    De Clerck, H. J.; Cevidanes, L. H.; Franchi, L.

    2011-01-01

    The aim of the present morphometric investigation was to evaluate the effects of bone-anchored maxillary protraction (BAMP) in the treatment of growing patients with Class III malocclusion. The shape and size changes in the craniofacial configuration of a sample of 26 children with Class III malocclusions consecutively treated with the BAMP protocol were compared with a matched sample of 15 children with untreated Class III malocclusions. All subjects in the two groups were at a prepubertal stage of skeletal development at time of first observation. Average duration of treatment was 14 months. Significant treatment-induced modifications involved both the maxilla and the mandible. The most evident deformation consisted of marked forward displacement of the maxillary complex with more moderate favourable effects in the mandible. Deformations in the vertical dimension were not detected. The significant deformations were associated with significant differences in size in the group treated with the BAMP protocol. PMID:21187527

  13. A comparative evaluation of dermatoglyphics in different classes of malocclusion

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    Garima Jindal

    2015-04-01

    Conclusion: Dermatoglyphic analysis can be used as an indicator of malocclusion at an early age, thereby aiding the development of treatments aiming to establish favorable occlusion. Inheritance and twin studies, as well as those conducted in different ethnic groups, are required to examine these relationships further.

  14. Pressure from the lips and the tongue in children with classmalocclusion

    Institute of Scientific and Technical Information of China (English)

    RUAN Wen-hua; SU Ji-mei; YE Xiao-wei

    2007-01-01

    Objective: To discuss possible relationships between classmalocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with classmalocclusion. Methods: Thirty-one children with classmalocclusion were investigated and their perioral forces were measured at rest and during swallowing under natural head position by a custom-made miniperioral force computer measuring system. Results: The resting pressures exerted on the labial side and palatine side of the upper left incisor, as well as the labial side and lingual side of the lower left incisor, were 0 g/cm2, 0 g/cm2, 0.57 g/cm2and 0.23 g/cm2, respectively. Correspondingly, the swallowing forces were 2.87 g/cm2, 5.97 g/cm2, 4.09 g/cm2 and 7.89 g/cm2,respectively. No statistical difference between muscular pressure and gender existed. During swallowing, the lingual forces were significantly higher than the labial forces (P<0.01), however, at rest there was no significantly different force between these two sides. Compared to the normal occlusion patients, children with classmalocclusion had lower perioral forces. The upper labial resting forces (P<0.01), the lower labial resting forces (P<0.05) and all the swallowing pressures from the lips and the tongue (P<0.01) showed statistical differences between the two different occlusion conditions. Meanwhile, no significant difference was found for the resting pressure from the tongue between classmalocclusion and normal occlusion. Conclusion: Patients with classmalocclusion have lower perioral forces and this muscle hypofunction may be secondary to the spatial relations of the jaws. The findings support the spatial matrix hypothesis.

  15. Influence of surgical orthodontic treatment on masticatory function in skeletal Class III patients.

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    Kubota, T; Yagi, T; Tomonari, H; Ikemori, T; Miyawaki, S

    2015-10-01

    Skeletal Class III patients exhibit malocclusion characterised by Angle Class III and anterior crossbite, and their occlusion shows total or partially lateral crossbite of the posterior teeth. Most patients exhibit lower bite force and muscle activity than non-affected subjects. While orthognathic surgery may help improve masticatory function in these patients, its effects have not been fully elucidated. The aims of the study were to evaluate jaw movement and the electromyographic (EMG) activity of masticatory muscles before and after orthognathic treatment in skeletal Class III patients in comparison with control subjects with normal occlusion. Jaw movement variables and EMG data were recorded in 14 female patients with skeletal Class III malocclusion and 15 female controls with good occlusion. Significant changes in jaw movement, from a chopping to a grinding pattern, were observed after orthognathic treatment (closing angle P Class III patients improves the masticatory chewing pattern and muscle activity. However, the chewing pattern remains incomplete compared with controls.

  16. Compensatory canine angulation in angle Class II and III patients

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    Mauro Carlos Agner Busato

    2009-09-01

    Full Text Available The aim of this study was to evaluate the occurence of compensation in mesiodistal axial inclinations of canines in skeletal malocclusions patients. The sample consisted of 25 Angle Class II, division 1 malocclusion (group 1 and 19 Angle Class III malocclusion patients (group 2. After measurement of dental angulations through a method that associates plaster model photography and AutoCad software, comparisons between the groups were performed by T-test for independent samples. Results showed that there was no statistically significant difference (p < 0.05 between groups, when maxillary canine angulations were compared. Regarding the mandibular canines, there was a statistically significant difference in dental angulation, expressed by 3.2° for group 1 and 0.15° for group 2. An upright position tendency for mandibular canines was observed in the Angle Class III sample. This configures a pattern of compensatory coronary positioning, since the angulation of these teeth makes them occupy less space in the dental arch and consequently mandibular incisors can be in a more retracted position in the sagittal plane.

  17. Angle Class I malocclusion with anterior open bite treated with extraction of permanent teeth.

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    Pithon, Matheus Melo

    2013-01-01

    This clinical case reports the orthodontic treatment of a Class I malocclusion with anterior open bite and bimaxillary dentoalveolar protrusion in a 28-year-old female patient. The treatment of choice was to perform tooth extractions followed by retraction of the anterior teeth, with consequent closure of the anterior open bite and better accommodation of the teeth on their bony bases. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO), representing the Category 2 -- i.e., an Angle Class I malocclusion, with anterior open bite, treated with extraction of permanent teeth --, as part of the requisites to become a BBO diplomate.

  18. Is traditional treatment a good option for an adult with a Class II deepbite malocclusion?

    Science.gov (United States)

    Abdo Quintão, Catia Cardoso; Miguel, Jose Augusto Mendes; Brunharo, Ione Portela; Zanardi, Gustavo; Feu, Daniela

    2012-01-01

    The Tweed-Merrifield directional force technique is a useful treatment approach for a patient with a Class II malocclusion with dentoalveolar protrusion. The purpose of this case report was to present the diagnosis and treatment descriptions of a patient with an Angle Class II malocclusion complicated by tooth losses, severe dentoalveolar protrusion, and skeletal discrepancy. Treatment involved extraction of the maxillary first premolars, high-pull headgear to enhance anchorage, and high-pull J-hook headgear to retract and intrude the maxillary anterior segments. A successful outcome was achieved with traditional orthodontic treatment in this borderline surgical case.

  19. Management of severe Class II malocclusion with sequential modified twin block and fixed orthodontic appliances

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    Sonal Chowdhary

    2016-01-01

    Full Text Available Functional appliance is an effective way of treating skeletal Class II malocclusion in children and adolescents. A 12 months stepwise mandibular advancement protocol with Herbst appliance has been proved to enhance condylar growth and improve mandibular prognathism. The present case report documents a 12-year-old boy presenting with Angle's Class II, division 1 malocclusion associated with excessive overjet (11 mm, 100% deep bite, and retrognathic mandible. He was treated by a phase I growth modification therapy using twin block appliance with lip pads in a stepwise mandibular advancement protocol followed by a phase II preadjusted Edgewise appliance therapy.

  20. Comparative study of linear and angular measures of the cranial base in skeletal Class I and III malocclusion = Estudo comparativo de medições lineares e angulares da base do crânio em maloclusão esquelética Classe I e III

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    Berger, Olga Patricia Dias de Almeida

    2011-01-01

    Conclusão: Este estudo concorda com estudos anteriores de que a flexão da base do crânio contribui para a configuração esquelética no padrão de Classe III esquelética. Logo, a base do crânio deve ser avaliada nas previsões de crescimento e no diagnóstico da Classe III. O estudo do efeito da base do crânio no posicionamento dos maxilares deve ser mais aprofundado

  1. Assessment of upper airways measurements in patients with mandibular skeletal Class II malocclusion

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    Nayanna Nadja e Silva

    2015-10-01

    Full Text Available Objective: Mandibular Class II malocclusions seem to interfere in upper airways measurements. The aim of this study was to assess the upper airways measurements of patients with skeletal Class II malocclusion in order to investigate the association between these measurements and the position and length of the mandible as well as mandibular growth trend, comparing the Class II group with a Class I one.Methods:A total of 80 lateral cephalograms from 80 individuals aged between 10 and 17 years old were assessed. Forty radiographs of Class I malocclusion individuals were matched by age with forty radiographs of individuals with mandibular Class II malocclusion. McNamara Jr., Ricketts, Downs and Jarabak's measurements were used for cephalometric evaluation. Data were submitted to descriptive and inferential statistical analysis by means of SPSS 20.0 statistical package. Student's t-test, Pearson correlation and intraclass correlation coefficient were used. A 95% confidence interval and 5% significance level were adopted to interpret the results.Results:There were differences between groups. Oropharynx and nasopharynx sizes as well as mandibular position and length were found to be reduced in Class II individuals. There was a statistically significant positive correlation between the size of the oropharynx and Xi-Pm, Co-Gn and SNB measurements. In addition, the size of the nasopharynx was found to be correlated with Xi-Pm, Co-Gn, facial depth, SNB, facial axis and FMA.Conclusion: Individuals with mandibular Class II malocclusion were shown to have upper airways measurements diminished. There was a correlation between mandibular length and position and the size of oropharynx and nasopharynx.

  2. Angle Class I malocclusion and agenesis of lateral incisors

    OpenAIRE

    2011-01-01

    p. 137-147 Orthodontic planning for patients with agenesis of lateral incisors should include extremely relevant esthetic and functional considerations so that a satisfactory clinical result is achieved. Both space closure and space opening or maintenance have advantages and disadvantages that should be evaluated according to the patient's individual characteristics. Some of the important factors that affect planning are the skeletal pattern, the type of malocclusion and the color and shap...

  3. Very few indications justify early treatment for severe Class II malocclusions

    NARCIS (Netherlands)

    Ren, Yijin

    2004-01-01

    DESIGN: This was a single-centre two-phased, parallel, randomised clinical trial (RCT) conducted over a period of more than 10 years. INTERVENTION: Children were enrolled who had severe (=7 mm overjet) Class II malocclusions and who were developmentally at least a year before their peak pubertal gro

  4. A Cephalometric Comparison of Twin Block and Bionator Appliances in Treatment of Class II Malocclusion

    Science.gov (United States)

    Ahmadian-Babaki, Fatemeh; Araghbidi-Kashani, S. Mehdi

    2017-01-01

    Background Class II malocclusion is one of the most common orthodontic problems. In cases of class II malocclusion with mandibular deficiency, functional appliances often are used with the intent of stimulating mandibular growth. Bionator and twin block are two of the more popular functional appliances. The aim of this study was to compare the treatment outcomes of these two appliances using cephalometric radiographs. Material and Methods Cephalometric radiographs of 33 patients who had class II division I malocclusion, before and after treatment were digitalized. The mean changes in twin block and bionator groups were compared using independent t test. Results Twin block and bionator showed no statistically significant differences in cephalometric parameters except for ANB, NA-Pog, Basal and Ar-Go-Me angles. Conclusions There were no statistically significant differences in dentoalveolar and mandibular position between twin block and bionator (p>0.1). Twin block was more efficient in inhibition of forward movement of maxilla (p<0.1). Key words:Functional, Class II malocclusion, Cephalometrics, Twin block, Bionator, Treatment. PMID:28149473

  5. [Features of the hormonal status in patients with temporomandibular joint dysfunction and class II malocclusion].

    Science.gov (United States)

    Gus, L A; Arsenina, O I; Komolov, I S

    2015-01-01

    The article presents data on androgen levels in female patients with temporomandibular joint (TMJ) dysfunction of varying degree and class II malocclusion. The study revealed significant correlation between degenerative and inflammatory TMJ changes and androgens level in patients with stigmas of connective tissue dysplasia (p<0.05), probably due to indirect proinflammatory action of androgens as they stimulate inflammatory mediators expression.

  6. Phenotypic Diversity in Caucasian Adults with Moderate to Severe Class II Malocclusion

    Science.gov (United States)

    Moreno Uribe, Lina M.; Howe, Sara C.; Kummet, Colleen; Vela, Kaci C.; Dawson, Deborah V.; Southard, Thomas E.

    2014-01-01

    INTRODUCTION Class II malocclusion affects about 15 % of the US population and is characterized by a convex profile and occlusion disharmonies. The specific etiological mechanisms resulting in the range of Class II dento-skeletal combinations observed is not yet understood. Most studies describing the class II phenotypic diversity have utilized moderate sample sizes or have focused on younger individuals that later in life may outgrow their class II discrepancies; such a focus may also preclude the visualization of adult class II features. The majority have utilized simple correlation methods resulting in phenotypes that may not be generalizable to different samples and thus may not be suitable for studies of malocclusion etiology. The purpose of this study is to address these knowledge gaps by capturing the maximum phenotypic variation present in a large Caucasian sample of class II individuals selected with strict eligibility criteria and rigorously standardized multivariate reduction analyses. METHODS Sixty-three lateral cephalometric variables were measured from pre-treatment records of 309 Class II Caucasian adults (82 males, 227 females; ages 16–60 years). Principal component analysis (PCA) and cluster analysis were used to generate comprehensive phenotypes in an effort to identify the most homogeneous groups of individuals reducing heterogeneity and improving the power of future malocclusion etiology studies. RESULTS PCA resulted in 7 principal components that accounted for 81% of the variation. The first three components represented variation on mandibular rotation, upper incisor angulation and mandibular length, respectively. The cluster analysis identified 5 distinct Class II phenotypes. CONCLUSIONS A comprehensive spectrum of Class II phenotypic definitions was obtained that could be generalized to other samples advancing our efforts to the identification of etiological factors underlying Class II malocclusion. PMID:24582022

  7. Ortho-surgical treatment of Class III dentofacial deformity

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    Valdinei Anisio Santos

    2014-01-01

    Full Text Available Class III facial pattern is characterized by a negative sagittal lineament and has been one of the greatest challenges in orthodontics. This is due to the poor prognosis of this type of malocclusion. The treatment of this malocclusion, in adulthood, involves orthodontic mechanics combined with orthognathic surgery. In general, the facial aspect is greatly compromised, and this is precisely what encourages the patient to seek treatment in most cases. This study is based on a clinical case whose treatment consisted of two surgical steps: Palatal disjunction followed by procedures in the mandible (osteotomy for bilateral sagittal split and mentoplasty and maxilla (Le Fort I. In the cases of major maxillomandibular discrepancies, surgical-orthodontic treatment is indicated, considering that none of specialties alone show functional and aesthetically satisfactory results.

  8. Verificação da atividade condilar em pacientes com padrão esquelético classe III por intermédio da cintilografia óssea Skeletal scintigraphy for assessment of condylar uptake in class III malocclusion

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    Larissa Perales Bittencourt

    2005-08-01

    Full Text Available OBJETIVO: Utilizar a cintilografia óssea facial para identificar o crescimento esquelético mandibular, através do metabolismo ósseo condilar de indivíduos com crescimento craniofacial equilibrado, e compará-lo à atividade condilar daqueles com crescimento mandibular excessivo. MATERIAIS E MÉTODOS: Quarenta e sete indivíduos, de ambos os sexos, entre 18 e 28 anos de idade, foram divididos em grupo controle - classe I (n = 13 - e grupo caso - classe III (n = 34. As imagens foram obtidas duas horas após injeção intravenosa de 200 µCi/kg de 99mTc-MDP. Foram realizadas incidências laterais do crânio e posterior da coluna lombar e a taxa de contagem foi determinada pela obtenção da média de contagem dos côndilos e da quarta vértebra lombar utilizando 300.000 contagens. RESULTADOS: Não foram encontradas captações condilares assimétricas em ambos os grupos, e apesar da ausência de significância estatística, os valores médios de captação condilar foram maiores no grupo caso. CONCLUSÃO: A média de captação aumentada indicou maior metabolismo ósseo condilar nos indivíduos classe III, sugerindo um provável crescimento mandibular residual. Mais estudos estão sendo realizados para aumentar esta amostragem.OBJECTIVE: To use skeletal scintigraphy to detect mandibular growth through the analysis of bone metabolism in individuals with normal craniofacial growth, and to compare the findings with those seen in individuals with excessive craniofacial growth. MATERIALS AND METHODS: Forty-seven male and female patients between 18 to 28 years of age were divided in two groups - class I, control (n = 13, and class III, case (n = 34. Images were obtained two hours after intravenous injection of 99mTc-MDP (200 µCi/kg. Right and left side views of the mandible were obtained as well as a posterior view of the lumbar spine. The count rate was determined by the mean values of the count of the condyles and of the fourth lumbar vertebra

  9. ACTN3 R577X Genotypes Associate with Class II and Deep Bite Malocclusions

    Science.gov (United States)

    Zebrick, Brian; Teeramongkolgul, Teesit; Nicot, Romain; Horton, Michael J.; Raoul, Gwenael; Ferri, Joel; Vieira, Alexandre R.; Sciote, James J.

    2014-01-01

    Introduction α-actinins are myofibril anchor proteins which influence contractile properties of skeletal muscle. ACTN2 is expressed in slow type I and fast type II fibers whereas ACTN3 is expressed only in fast fibers. ACTN3 homozygosity for the 577X stop codon (i.e. changing 577RR to 577XX - the R577X polymorphism) results in the absence of α-actinin-3 in about 18% of Europeans, diminished fast contractile ability, enhanced endurance performance and reduced bone mass or bone mineral density. We have examined ACTN3 expression and genetic variation in masseter muscle of orthognathic surgery patients to determine genotype associations with malocclusion. Methods Clinical information, masseter muscle biopsies and saliva samples were obtained from 60 subjects. Genotyping for ACTN3 SNPs, RT-PCR quantitation of muscle gene message and muscle morphometric fiber type properties were compared to determine statistical differences between genotype and phenotype. Results Muscle mRNA expression level was significantly different for ACTN3 SNP genotypes (p<0.01). The frequency of ACTN3 genotypes was significantly different for sagittal and vertical classifications of malocclusion with the clearest association being elevated 577XX genotype in skeletal class II malocclusion (p = 0.003). This genotype also resulted in significantly smaller diameter of fast type II fibers in masseter muscle (p = 0.002). Conclusion ACTN3 577XX is overrepresented in skeletal class II malocclusion, suggesting a biologic influence during bone growth. ACTN3 577XX is underrepresented in deep bite malocclusion, suggesting muscle differences contribute to variations in vertical facial dimensions. PMID:25439211

  10. Comparison of Activator-Headgear and Twin Block Treatment Approaches in Class II Division 1 Malocclusion

    Science.gov (United States)

    Mroz Tranesen, Kate; Birkeland, Kari; Katic, Visnja; Pavlic, Andrej; Vandevska-Radunovic, Vaska

    2017-01-01

    The purpose was to compare the treatment effects of functional appliances activator-headgear (AH) and Twin Block (TB) on skeletal, dental, and soft-tissue structures in class II division 1 malocclusion with normal growth changes in untreated subjects. The sample included 50 subjects (56% females) aged 8–13 years with class II division 1 malocclusion treated with either AH (n = 25) or TB (n = 25) appliances. Pre- and posttreatment lateral cephalograms were evaluated and compared to 50 untreated class II division 1 cases matched by age, gender, ANB angle, and skeletal maturity. A paired sample, independent samples tests and discriminant analysis were performed for intra- and intergroup analysis. Treatment with both appliances resulted in significant reduction of skeletal and soft-tissue facial convexity, the overjet, and the prominence of the upper lip in comparison to untreated individuals (p < 0.001). Retroclination of maxillary incisors and proclination of mandibular incisors were seen, the latter being significantly more evident in the TB group (p < 0.05). Increase of effective mandibular length was more pronounced in the TB group. In conclusion, both AH and TB appliances contributed successfully to the correction of class II division 1 malocclusion when compared to the untreated subjects with predominantly dentoalveolar changes. PMID:28203569

  11. Class II, Division 1 Angle malocclusion with severe proclination of maxillary incisors

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    Kátia Montanha

    2016-02-01

    Full Text Available Protrusion of maxillary incisors is a common complaint among patients seeking orthodontic treatment. This report addresses the correction of Class II Angle malocclusion with excessively bucally proclined maxillary incisors, in an adolescent female patient, through the use of extraoral and fixed appliances. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as part of the requirements for obtaining the title of certified by the BBO.

  12. Treatment of a Class II division 1 anterior open bite malocclusion.

    Science.gov (United States)

    Ong, H B

    2001-06-01

    A case report of an 11-year-old Caucasian female who presented with a Class II div I anterior open bite malocclusion. Overjet is 6 mm and the anterior open bite 2 mm. There was a history of digit sucking till she was eight years old. She was successfully treated by non-extraction with pre-adjusted Edgewise appliances and high-pull headgear for a period of 27 months.

  13. Prevalence of malocclusions in a young Brazilian population.

    Science.gov (United States)

    Grando, G; Young, A A A; Vedovello Filho, M; Vedovello, S A S; Ramirez-Yañez, G O

    2008-01-01

    Malocclusions are generally treated in adolescents and adults, but they are established at an early age. The purpose of this study was to determine the prevalence of malocclusions in a young Brazilian population. The sample included 926 children, 8 to 12 years old, attending 5 public schools in the state of Goias, Brazil The type of occlusion was visually determined during the oral exam and statistical analysis, Chi-square test, was performed to correlate the prevalence of malocclusion with gender and with age. 819 patients out of the 926 patients had some type of malocclusion. From those, 513 patients had a class I malocclusion, 201 patients were classified as class II malocclusion, and 105 patients were class III malocclusion. Vertically, 62 patients showed a deep bite and 61 patients had an open bite. Transversely, 40 patients presented a bilateral posterior crossbite, 54 patients had a posterior crossbite on the left side, and 39 patients had a posterior crossbite on the right side. No significant correlation between gender and malocclusions was found and the number of patients with malocclusions between boys and girls were similar. Considering the three spatial planes, there is a high prevalence of malocclusions among the young Brazilian population. Therefore, the dental community must improve health policies and treat malocclusions earlier.

  14. Distribution of malocclusion types in 7-9-year-old Iranian children.

    Science.gov (United States)

    Danaie, S M; Asadi, Z; Salehi, P

    2006-01-01

    This study assessed the malocclusion types, very severe crowding and need for serial extraction among a random sample of 7-9-year-old children in Shiraz, Islamic Republic of Iran. Of the 3776 children 30.6% had normal occlusion, 47.4% class I malocclusion, 13.7% class II division 1 malocclusion (male/female ratio 3:2), 1.0% class II division 2 malocclusion (male/female ratio 3:1) and 2.1% class III malocclusion. Among the children examined, 47.9% had crowding problems and 14.7% of them had class I malocclusion with very severe crowding-more girls (17.3%) than boys (12.1%). No correlation was observed between the types of malocclusion and family size, parents' occupation or level of education.

  15. Class II malocclusion with deep overbite: a sequential approach

    Directory of Open Access Journals (Sweden)

    Fernando Lima Martinelli

    2012-12-01

    Full Text Available OBJECTIVE: The aim of this case report was to evaluate the results of deep overbite correction by the segmented arch technique. METHODS: The first stage of the treatment was performed with this technique to intrude incisors and canines. A maxillary transpalatal bar and a mandibular lingual arch using 0.051-in archwire were employed associated to a facial bow, anchored primarily with occipital pull and, after molar relationship correction, changed to high pull. RESULTS: Upper incisors presented a great amount of intrusion and some palatal root inclination as programmed in the treatment plan. The skeletal mandibular response was favorable to achieve profile balance. Periapical radiograph showed rounded apex of incisor roots, expected in any orthodontic intrusion movement. CONCLUSION: The clinical results present the successful approach to deep overbite malocclusion.OBJETIVO: o objetivo desse relato de caso clínico foi avaliar os resultados da correção da sobremordida exagerada por meio da técnica do arco segmentado. MÉTODOS: na primeira etapa do tratamento, utilizou-se essa técnica para intrusão dos incisivos e caninos. Em seguida, foram confeccionados e instalados uma barra transpalatina superior e um arco lingual inferior, ambos com fio de 0,051" de espessura, sendo associados ao arco facial ancorado, primeiramente, em tração occipital e, após a correção da chave de oclusão, foi modificada para tração parietal. RESULTADOS: os incisivos superiores apresentaram grande quantidade de intrusão com discreta inclinação palatal das raízes, conforme determinado no plano de tratamento. A resposta mandibular foi favorável, possibilitando o alcance de perfil mais harmonioso. Nas radiografias periapicais, observou-se suave arredondamento apical nas raízes dos incisivos, compatível com movimento de intrusão. CONCLUSÃO: os resultados clínicos conferem sucesso na abordagem da correção da sobremordida exagerada.

  16. Relationship among malocclusion, number of occlusal pairs and mastication

    Directory of Open Access Journals (Sweden)

    Vanesa Rios-Vera

    2010-12-01

    Full Text Available This study evaluated the relationship among malocclusion, number of occlusal pairs, masticatory performance, masticatory time and masticatory ability in completely dentate subjects. Eighty healthy subjects (mean age = 19.40 ± 4.14 years were grouped according to malocclusion diagnosis (n = 16: Class I, Class Class II-2, Class III and Normocclusion (control. Number of occlusal pairs was determined clinically. Masticatory performance was evaluated by the sieving method, and the time used for the comminute test food was registered as the masticatory time. Masticatory ability was measured by a dichotomic self-perception questionnaire. Statistical analysis was done by one-way ANOVA, ANOVA on ranks, Chi-Square and Spearman tests. Class II-1 and III malocclusion groups presented a smaller number of occlusal pairs than Normocclusion (p < 0.0001, Class I (p < 0.001 and II-2 (p < 0.0001 malocclusion groups. Class I, and III malocclusion groups showed lower masticatory performance values compared to Normocclusion (p < 0.05 and Class II-2 (p < 0.05 malocclusion groups. There were no differences in masticatory time (p = 0.156 and ability (χ2 = 3.58/p= 0.465 among groups. Occlusal pairs were associated with malocclusion (rho = 0.444/p < 0.0001 and masticatory performance (rho = 0.393/p < 0.0001, but malocclusion was not correlated with masticatory performance (rho = 0.116/p= 0.306. In conclusion, masticatory performance and ability were not related to malocclusion, and subjects with Class I, II-1 and III malocclusions presented lower masticatory performance because of their smaller number of occlusal pairs.

  17. Inlfuence factor analysis of facial proifle and features of skeletal class III malocclusion before and after combined orthodontic and surgical treatments%骨性Ⅲ类错牙合畸形正畸-正颌联合治疗前后颌面部的特征变化及侧貌影响因素分析

    Institute of Scientific and Technical Information of China (English)

    刘迪; 周诺

    2016-01-01

    Objective To provide further and effective reference for the combined orthodontic and surgical treatments of patients with skeletal class III malocclusion.through studying the changes between the characteristics of soft and hard tissue proifle before and after combined orthodontic and surgical treatments.MethodsThe study included 73 skeletal class III malocclusion patients.Chose 21 indexes which pertaining to the characteristics of soft and hard tissue proifle from the imaging data before and after combined orthodontic and surgical treatments.then research the influencing factors through contrast analysis and correlation analysis.Results There was signiifcant differences between the before and after combined orthodontic and surgical treatments in the 17 of above mentioned indexes,except for ANS-Me/N-Me (%),L1-NB (mm),Y-axis angle(°) and MP-SN (°). High correlation was found in several hard tissue indexes and their corresponding soft tissue indexes, the correlation coefifcient of NP-FH(°) and Y-axis angle(°),SNA(°) and FH- N`Pg`(°) attain to 0.914,-0.883,-0.742 respectively.Conclusion According to skeletal class III malocclusion patients,osseous factor is the main inlfuencing factors on facial proifle,others are dental factor and soft tissue thickness.Cephalometric characteristics of these patients mainly reflected the lower one third of the face to the overgrown in the sagittal deformity, often accompanied by receding chin, while the vertical to the general has no obvious abnormalities. Through combined orthodontic and surgical treatments can improve the side appearance.%目的:通过对比研究骨性Ⅲ类错牙合畸形患者正畸-正颌联合治疗前后颌面部软硬组织、侧貌变化情况,对正畸-正颌联合治疗骨性Ⅲ类错牙合畸形提供进一步参考。方法:选择73例骨性Ⅲ类错牙合畸形患者,分别在正畸-正颌联合治疗前后影像学资料中选择21项能够反映颌面部软硬组织、侧貌形态的参

  18. Orthodontic retreatment of a Class III patient with significant midline asymmetry and bilateral posterior crossbite

    Directory of Open Access Journals (Sweden)

    Ademir R. Brunetto

    2015-02-01

    Full Text Available Posterior crossbite might cause serious long-term functional problems if not early treated. Nevertheless, in older patients, treatment might include palatal expansion in order to correct such malocclusion. In view of the above, this article aims at reporting late correction of bilateral posterior crossbite associated with Angle Class III malocclusion, right subdivision, with consequent midline shift (good skeletal pattern. The case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, with DI equal to or greater than 10, as a requirement for the title of certified by the BBO.

  19. Relationship among malocclusion, number of occlusal pairs and mastication

    OpenAIRE

    Vanesa Rios-Vera; Alfonso Sánchez-Ayala; Plínio Mendes Senna; Gustavo Watanabe-Kanno; Altair Antoninha Del Bel Cury; Renata Cunha Matheus Rodrigues Garcia

    2010-01-01

    This study evaluated the relationship among malocclusion, number of occlusal pairs, masticatory performance, masticatory time and masticatory ability in completely dentate subjects. Eighty healthy subjects (mean age = 19.40 ± 4.14 years) were grouped according to malocclusion diagnosis (n = 16): Class I, Class Class II-2, Class III and Normocclusion (control). Number of occlusal pairs was determined clinically. Masticatory performance was evaluated by the sieving method, and the time used for...

  20. Semi-longitudinal Study of the Mcnamara Cephalometric Triangle in Class II and Class III Subjects Grouped by Cervical Vertebrae Maturation Stage.

    Science.gov (United States)

    Arriola-Guillén, Luis E; Fitzcarrald, Fernando D; Flores-Mir, Carlos

    2015-12-01

    The aim was to compare the McNamara cephalometric triangle values in untreated normodivergent Class II and Class III malocclusion subjects of Latin American origin grouped by cervical vertebrae maturation stage to an untreated Class I malocclusion normodivergent control group. The study was conducted on a sample of 610 pretreatment lateral cephalograms (250 male, 360 female), examined and grouped according to their anteroposterior skeletal relationship (Class I, II or III), cervical vertebrae maturation stage (Pre Pubertal Peak P1 = CS1 and CS2, Pubertal Peak P2= CS3 and CS4, and Post Pubertal Peak P3 = CS5 and CS6) and sex. Co-A, Co-Gn and ENA-Me were measured in each lateral cephalogram. ANOVA and Tukey HSD post-hoc tests were performed to determine differences between the groups. The results showed that in males, the greatest maxillary and mandibular dimensional increases occurred during the P3 stage (CS5 to CS6), while in females, they occurred in the P2 stage (CS3 to CS4). The Co-A and Co-Gn showed significant differences between the malocclusion classes (pClass II subjects and the mandibular lengths in Class III subjects were already higher at the beginning of the period evaluated (P1). A worsening trend for the Class II and III malocclusions was identified during the period evaluated. Finally, changes in the McNamara cephalometric triangle values were markedly different in the three normodivergent skeletal malocclusion classes. In these Latin American subjects the pubertal growth spurt occurred at different times with respect to the Caucasian and Asian norms.

  1. Bridging of the sella turcica in skeletal Class III subjects.

    Science.gov (United States)

    Meyer-Marcotty, Philipp; Reuther, Tobias; Stellzig-Eisenhauer, Angelika

    2010-04-01

    Several investigations have analysed the frequency of sella turcica anomalies in patients with severe craniofacial deviations. Until now, there have been no studies concerning the prevalence of sella turcica bridging in homogenous groups of patients. Therefore, the aims of this controlled study were to analyse the prevalence of sella turcica bridging and measure the size of the sella turcica in two well-defined groups of Caucasian individuals. In a multicentre retrospective study, 400 pre-treatment lateral cephalograms of adult patients (over 17 years of age) with a skeletal Class III (n = 250, 132 females and 118 males) or a skeletal Class I (n = 150, 94 females and 56 males) malocclusion were analysed. The morphology, length, depth, and diameter of the sella turcica were investigated. For statistical analysis, chi-square and t-tests were used. Skeletal Class III patients presented a significantly higher rate of sella turcica bridging, 16.8 per cent (P = 0.031), in comparison with skeletal Class I patients, whose rate was 9.4 per cent. No differences between females and males were detected for the length, depth, and diameter of the sella turcica. Bridging of the sella turcica could be seen radiographically in skeletal Class III subjects.

  2. An Eectromyographic Ccomparison Between the Activities of Temporal and Masseter Muscles in Class III Skeletal

    Directory of Open Access Journals (Sweden)

    T Hossein-Zadeh-Nik

    2002-02-01

    Full Text Available Electromyographic (EMG investigations about the activities of the muscles have been the focus of attention for many years. In the field of orthodontics, investigators, among other things, tried to evaluate correlation between EMG activity, occlusal relationships and craniofacial morphology to analyze the effect of muscular activity, as an etiological factor in malocclusion. The purpose of the present investigation is to analyze the effect of EMG activity of temporal and masseter muscles quantitatively in skeletal class III malocclusion. 26 patients (9 to If years old, with class III malocclusion were selected and their EMG activity of temporal and masseter muscles in rest position, centric occlusion, clenching, mastication and swallowing were compared with 20 normal children at the same age range. Then the statistical correlation between 13 cephalometric parameters and EMG activities were analyzed and then the regression analysis was performed and the results were as follows:1- The mean amplitude of masseter and temporal muscles activity in rest position, centric occlusion, mastication, and clenching in class III samples were greater than normal group (PO.05.2- The mean duration of masseter and temporal muscles activity in rest position and centric occlusion in class III samples were more than normal group (PO.05.3- According to regression analysis, a linear correlation was observed between ANB angle and temporal muscle activity in rest and centric occlusion that was not observed in other cases.The findings of this study showed that difference in temporal muscle activity in class III malocclusion, in comparison with the normal group, is correlated with skeletal morphology of the face, but according to other investigations it is not ture for the masseter muscle.

  3. Successful treatment of Class II malocclusion with bidental protrusion using standard edgewise prescription

    Directory of Open Access Journals (Sweden)

    Mohd Ayaz

    2016-01-01

    Full Text Available This case report deals with the successful orthodontic treatment of a 14-year-old female patient having Class II malocclusion with bidental protrusion using standard edgewise prescription. She reported with forwardly placed upper front teeth and difficulty in closing lips. She had prognathic maxilla, retrognathic mandible, and full cusp Class II molar and canine relation bilaterally with overjet of 7 mm. She was in cervical vertebrae maturation indicator Stage IV. The case was treated by fixed extraction mechanotherapy. Interarch Class II mechanics was used to retract the upper incisor and to mesialize the lower molars. Simultaneously, Class I mechanics was used to upright lower incisors. Tip back bend, curve of Spee, and extra palatal root torque were incorporated in upper archwire to maintain molars in upright position and prevent extrusion and deepening of bite, respectively. There was satisfactory improvement in facial profile at the end of 24 months. After a follow-up of 6 months, occlusion was stable.

  4. Orthopedic coordination of dentofacial development in skeletal Class II malocclusion in conjunction with edgewise therapy. Part I.

    Science.gov (United States)

    Bass, N M

    1983-11-01

    The skeletal Class II malocclusion may be considered to develop as a failure of the coordinating process to maintain harmonious relationships within the developing dentofacial apparatus. If the skeletal elements are too far apart for adaptation to occur and/or if there are functional abnormalities of the orofacial musculature which inhibit coordination from taking place, a malocclusion will result. An orthopedic technique and appliance system has been developed with the intention of improving those factors responsible for the development and perpetuation of the skeletal Class II malocclusion in a primary stage of treatment. This is accomplished by means of restraint and redirection of forward maxillary growth and an increase in the velocity of mandibular growth. Concurrently, adverse soft-tissue influences are eliminated or ameliorated. Edgewise appliance therapy is subsequently carried out for the final correction. The subject is considered in two articles. This first article describes the effects of the restraint of maxillary growth on craniofacial development and the dental changes produced by a maxillary removable splint with extraoral traction and shows how they can be used clinically for correction of the skeletal Class II malocclusion. The experimental and clinical evidence supporting this approach is considered, and case histories show the clinical use of the maxillary splint. This form of maxillary therapy for the skeletal Class II malocclusion has limitations, and it is desirable for it to be incorporated into a comprehensive orthopedic system.

  5. Class II malocclusion treatment using high-pull headgear with a splint: a systematic review

    Directory of Open Access Journals (Sweden)

    Helder B. Jacob

    2013-04-01

    Full Text Available OBJECTIVE: To systematically review the scientific evidence pertaining to the effectiveness of high-pull headgear in growing Class II subjects. METHODS: A literature survey was performed by electronic database search. The survey covered the period from January 1966 to December 2008 and used Medical Subject Headings (MeSH. Articles were initially selected based on their titles and abstracts; the full articles were then retrieved. The inclusion criteria included growing subjects between 8 to 15 years of age, Class II malocclusion treatment with high-pull headgear, and a control group with Class II malocclusion. References from selected articles were hand-searched for additional publications. Selected studies were evaluated methodologically. RESULTS: Four articles were selected; none were randomized controlled trials. All of the articles clearly formulated their objectives and used appropriate measures. The studies showed that high-pull headgear treatment improves skeletal and dental relationship, distal displacement of the maxilla, vertical eruption control and upper molars distalization. One of the studies showed a slight clockwise rotation of the palatal plane; the others showed no significant treatment effect. The mandible was not affected by the treatment. CONCLUSION: While there is still a lack of strong evidence demonstrating the effects of high-pull headgear with a splint, other studies indicate that the AP relations improve due to distalization of the maxilla and upper molars, with little or no treatment effects in the mandible. Greater attention to the design should be given to improve the quality of such trials.

  6. Variation in Class II malocclusion: comparison of Mexican mestizos and American whites.

    Science.gov (United States)

    Phelan, Tom; Buschang, Peter H; Behrents, Rolf G; Wintergerst, Ana M; Ceen, Richard F; Hernandez, Angeles

    2004-04-01

    This study compared the skeletal and dental characteristics of Class II Division 1 white Americans and Mexicans. It was designed specifically to the evaluate ethnic, age, and sex differences of 101 whites and 107 Mexican mestizos, with approximately equal numbers in each subgroup. Three-way analyses of variance were used to simultaneously evaluate the effects of age, sex, ethnicity, and their interactions. Although Mexicans and whites in the United States had similar maxillomandibular relationships, Mexicans showed greater protrusion of the jaws and teeth. Mexican subjects with Class II malocclusions also showed less divergence of the cranial base (SN-FH angle) and greater vertical tendencies (MPA, Y-axis, and palatal plane angle) than their white counterparts. In comparison with children (mean age 9.0 years), young adults (mean age 20.1 years) had significantly larger craniofacial dimensions, jaws that were positioned more forward, and teeth that were more protruded. Sex differences pertained only to size (men were larger) and maxillary incisor angulation (men were more protrusive). The findings pertaining to the ethnic differences have important clinical implications regarding treatment decisions for Mexican and white patients. In addition, this study provides a foundation for future studies pertaining to Class II malocclusion in Mexicans.

  7. Familial aggregation of Skeletal Angle III Malocclusion%骨性安氏III 类错牙合的家族聚集性研究

    Institute of Scientific and Technical Information of China (English)

    王爽; 丰培勋; 陈曦; 姜庆生; 王菲; 张智勇

    2012-01-01

    Objective:To investigate the prevalence status of Skeletal Angle III Malocclusion in the first-degree relatives, and to explore the familial aggregation of Skeletal Angle III Malocclusion. Method: A cross sectional study was carried out to 125 pedigrees of Skeletal Angle III Malocclusion from the Stomatology Hospitals of Xi'an Jiaotong University from 2003 to 2007. The binomial distribution model were applied for testing the goodness-of-fit of frequency distribution.The segregation analysis was used to find out the inheritance model. Result: In the pedigrees of Skeletal Angle III Malocclusion, the frequency distribution of patient did not accord with the binomial distribution.The results of segregation analysis didn't suggest that Skeletal Angle III Malocclusion followed a pattern of autosomal recessive inheritance. Conclusion: There is significant familial aggregation in the pedigrees of Skeletal Angle III Malocclusion.Skeletal Angle III Malocclusion has charac teristics of polygenetic disease%目的:通过对先证者一级亲属骨性安氏III类错牙合发病的调查,探讨骨性安氏III 类错牙合分布的家族聚集性特点.方法:采用流行病学横断面研究的方法,对2003~2007 年西安交通大学口腔医院收治的125例骨性安氏III类错牙合先证者家族中骨性安氏III 类错牙合发病情况进行调查,对其家族中病例分布进行二项分布模型拟合,经x2检验进行频数分布拟合优度检验,并用分离分析推断其可能的遗传方式.先证者的诊断标准为:ANB<0°,前牙反牙合,不能后退至前牙对刃,下前牙舌倾.结果:骨性安氏III类错牙合先证者家系中的病例分布不服从二项分布.分离分析结果表明该病不属于常染色体隐性遗传.结论:骨性安氏III类错牙合的发病表现出明显的家族聚集性,且具有多基因遗传病的特点.

  8. Stability of molar relationship after non-extraction Class II malocclusion treatment

    Directory of Open Access Journals (Sweden)

    Darwin Vaz de Lima

    2013-04-01

    Full Text Available OBJECTIVE: This study aimed to evaluate the stability of molar relationship after non-extraction treatment of Class II malocclusion. METHODS: The sample comprised 39 subjects (16 females, 23 males with initial Class II malocclusion treated with no extractions, using fixed appliances. Mean age at the beginning of treatment was 12.94 years, at the end of treatment was 15.14 years and at post-retention stage was 21.18 years. Mean treatment time was 2.19 years and mean time of post-treatment evaluation was 6.12 years. To verify the influence of the severity of initial Class II molar relationship in stability of molar relationship, the sample was divided into two groups, one presenting a ½-cusp or ¾-cusp Class II molar relationship, and the other with full-cusp Class II molar relationship. In dental casts from initial, final and postretention stages, molar, first and second premolars and canine relationships were measured. Data obtained were analyzed by dependent ANOVA, Tukey and Pearson's correlation tests, as well as independent t test between the two groups divided by severity of initial molar relationship. RESULTS: There was a non-statistically significant 0.12 mm relapse of molar relationship. The initial severity of Class II molar relationship was not correlated to relapse in the post-retention period. When compared, the two groups showed no difference in relapse of molar relationship. CONCLUSION: It was concluded that correction of Class II molar relationship is stable and initial severity does not influence relapse of molar relationship.

  9. Cervical vertebral column morphology related to craniofacial morphology and head posture in preorthodontic children with Class II malocclusion and horizontal maxillary overjet

    DEFF Research Database (Denmark)

    Arntsen, Torill; Sonnesen, Ane Liselotte

    2011-01-01

    In preorthodontic children with Class II malocclusion and horizontal maxillary overjet, cervical column morphology was examined and related to craniofacial morphology and head posture for the first time.......In preorthodontic children with Class II malocclusion and horizontal maxillary overjet, cervical column morphology was examined and related to craniofacial morphology and head posture for the first time....

  10. Tratamento compensatorio da má oclusnao de classe lll: revisão de literatura

    OpenAIRE

    Dílio, Rogério Cássio [UNESP; Micheletti,Kelly Regina; Cuoghi, Osmar Aparecido [UNESP; Bertoz, André Pinheiro de Magalhães [UNESP

    2014-01-01

    Class III malocclusion is less common occlusal relationship, covering less than 5% of the population. There are various forms of treatment in Class III malocclusion. Depending on how the form is expressed Class III and age of the patient, the therapy may be orthopedic and orthodontic surgical orthodontics. The objective was to review the literature of the last 10 years about ways to compensatory treatment of Class III malocclusion. Several articles were published between 04/2003 and 04/2013 i...

  11. Wear-time recording during early Class III facemask treatment using TheraMon chip technology.

    Science.gov (United States)

    Stocker, Bruce; Willmann, Jan H; Wilmes, Benedict; Vasudavan, Sivabalan; Drescher, Dieter

    2016-09-01

    Successful intervention in a developing Class III malocclusion with facemask protraction therapy depends on a patient's ability to adhere to the recommendations for duration of appliance wear. In this article, we report the introduction of a novel approach for tracking of the duration of application of a protraction facemask, with the incorporation of a "FaceMon" sensor (TheraMon, microelectronic system; MC Technology GmbH, Hargelsberg, Austria) to track wear time. A 9-year-old boy with a Class III malocclusion was successfully treated with a modified alternate rapid maxillary expansion and constriction protocol and intermittent application of a hybrid hyrax-protraction facemask combination. The average duration of wear of the facemask was measured at 10.8 hours per day. The use of an objective measuring device may have implications for the development of treatment strategies, since patient responses may be able to calibrated in relation to compliance.

  12. Transverse craniofacial dimensions in Angle Class II, Division 1 malocclusion according to breathing mode

    Directory of Open Access Journals (Sweden)

    Agda Rísia David Pinto Coelho

    2010-03-01

    Full Text Available The aim of this longitudinal study was to assess the relation between the transverse craniofacial dimensions of subjects with Class II, Division 1 malocclusion and the breathing mode presented by them. Forty Angle Class II, Division 1 malocclusion subjects of both genders participated in the study, 23 of which were predominantly nose breathers and 17 were predominantly mouth breathers. The mean age ranged from 10 years and 9 months to 14 years - Age range 1; and from 13 years and 4 months to 16 years and 6 months - Age range 2. Measurements of six transverse craniofacial dimensions were performed in P-A teleradiographs: Total Sphenoid, Total Zygomatic, Total Nasal Cavity, Total Maxilla, Total Mastoid and Total Antegonion. The transversal craniofacial dimensions were measured and compared in both groups at age ranges 1 and 2. The longitudinal assessment of age ranges 1 and 2 showed that there was no statistically significant influence of the breathing mode on the craniofacial dimensions evaluated, or on the alteration of these dimensions. Breathing mode had no influence on craniofacial development in the sample studied.

  13. Clinical effects of fixed functional Herbst appliance in the treatment of class II/1 malocclusion

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    Nedeljković Nenad

    2009-01-01

    Full Text Available Introduction. Sagittal mandible deficiency is the most common cause of skeletal Class II malocclusion. Treatment objective is to stimulate sagittal mandible growth. Fixed functional Herbst appliance use is beneficial for shortening the time required for treatment and does not depend on patient compliance. Case outline. A 13-year-old girl was referred to the Clinic of Orthodontics, School of Dentistry in Belgrade following previous unsuccessful treatment of her skeletal Class II malocclusion using an activator. The patient's poor cooperation had led to failure of the treatment. Patient was subjected to the Herbst treatment for 6 months followed by fixed appliance for another 8 months. Lateral cephalograms before and after the treatment was performed. The remodelation of condylar and fossal articulation was assessed by superimposition of pre- and post-treatment temporomandibular joint tomograms. The promotion of oral hygiene and fluoride use was performed because orthodontic treatment carries a high caries risk and risk for periodontal disease. Skeletal and dental changes were observed after treatment (correction [Max+Mand]: molar relation 7 mm, overjet 8 mm, skeletal relation 5 mm, molars 2 mm, incisors 3 mm. Combination of Herbst and fixed appliances was effective in the treatment of dental and skeletal irregularities for a short period of time. Conclusion . In the retention period, 14 months after treatment, occlusal stability exists. Follow-up care in oral prevention is based on regular recalls at the dental office and supervision at home by the parents.

  14. [Angle class I malocclusion in primary dentition and findings in permanent dentition--a follow-up study].

    Science.gov (United States)

    Legovic, M; Legovic, A; Skrinjaric, T; Sasso, A; Mady, B

    2005-01-01

    The aim of the study was to examine stability and changes in Angle Class I malocclusion from deciduous to permanent dentition in 168 subjects. All the subjects had Class I malocclusion in deciduous dentition, and were examined by the same orthodontist on two occasions during deciduous and permanent dentition. None of the subjects had received orthodontic therapy in the meantime. The results showed considerable changes from primary to permanent dentition. Crowding in primary dentition was retained in permanent dentition in 45.2% cases. In 16.2% cases it changed into normocclusion and 38.6% subjects developed other types of malocclusion. Open bite was retained in permanent dentition in 17.8% cases and in 17.8% subjects transformed into normocclusion. 64.4% subjects developed other types of malocclusion. Cross bite was retained in permanent dentition in 21.4% cases and in 28.6% subjects changed to normocclusion. Other types of malocclusion in permanent dentition developed in 50% subjects. In 30.8% of cases finding of premature loss of deciduous teeth was accompanied by extraction of some permanent teeth. Normocclusion was retained in 19.2% cases while 50% of children developed some type of malocclusion. Crowding, which was retained in permanent dentition in 45.2% cases, showed the highest degree of stability. Children with this type of anomaly in primary dentition displayed the highest frequency of total malocclusions (83.3% subjects). Out of all anomalies in primary dentition, cross bite most frequently switched to normal occlusion in permanent dentition (in 28.6% cases).

  15. Orthodontic and orthognathic surgical correction of Class III malocclusion.

    Science.gov (United States)

    Collins, S M; Poulton, D R

    1996-02-01

    This case was presented as part of the student case displays at the 1994 AAO meeting, sponsored by the College of Diplomates of the American Board of Orthodontics. It was selected to be submitted for publication in the American Journal of Orthodontics and Dentofacial Orthopedics by a CDABO committee.

  16. Lip prints: The barcode of skeletal malocclusion

    Directory of Open Access Journals (Sweden)

    Pradeep Raghav

    2013-01-01

    Full Text Available Introduction: In orthodontics, apart from essential diagnostic aids, there are so many soft tissue analyses in which lips are major part of concern. However, lip prints have never been used in orthodontics as diagnostic aid or forensic tool. Therefore, this study was designed to explore the possible association of lip prints with skeletal malocclusion. Materials and Methods: A sample of 114 subjects in the age group of 18-30 years, from North Indian adult population were selected on the basis of skeletal class I, class II and class III malocclusion, each comprising of 38 subjects with equal number of males and females. Lip prints of all the individuals were recorded and digital soft copies of lateral cephalograms were taken. Lip prints were compared between different skeletal malocclusions. Results: It was found that branched lip pattern was most common in North Indian adult population with no sexual dimorphism. The Z-test for proportion showed that the prevalence of vertical lip pattern was significantly higher in subjects having skeletal class III malocclusion. Conclusion: A definite co-relation of vertical lip patterns with skeletal class III malocclusion was revealed.

  17. New perspective on Herbst therapy for skeletal Class II malocclusions: a proposal for maxillary protrusion management.

    Science.gov (United States)

    Filho, Leopoldino Capelozza; Siqueira, Danilo Furquim; de Castro, Renata Cristina Faria Ribeiro; An, Tien-Li; Cardoso, Mauricio de Almeida

    2012-01-01

    Angle Class II malocclusions may present morphologic deviations originated from the maxilla, mandible, or both. Since its reintroduction by Pancherz, the Herbst appliance has demonstrated effectiveness in the management of patients with mandibular deficiency. Because of the intermaxillary anchorage, the action of mandibular advancement provokes simultaneous reaction of maxillary restriction, similar to high-pull headgear. This aimed of this report is to compare two cases treated in two phases. In the first interceptive phase, the transverse problem was corrected by rapid maxillary expansion, which was followed by a Herbst appliance for mandibular advancement; in the second corrective phase, the cases were finished with fixed appliances. Although Herbst appliances were used in both patients, one patient with maxillary protrusion and another with mandibular deficiency, their use targeted different types of skeletal discrepancies. This difference allowed for the comparison of treatment effects, and although both patients had their malocclusion corrected, it seems reasonable to conclude that the final outcome was more favorable for the patient with maxillary protrusion.

  18. Twenty -year post-treatment assessment of class II division 1 malocclusion treated with non-extraction approach

    Directory of Open Access Journals (Sweden)

    Ashok Karad

    2013-01-01

    This article describes twenty-year post-treatment assessment of a class II division 1 malocclusion case, treated in the late mixed dentition stage, with the non-extraction treatment approach - molar-inserted headgear along with a fixed appliance therapy.

  19. Extraction of maxillary first molars improves second and third molar inclinations in Class II Division 1 malocclusion

    NARCIS (Netherlands)

    Livas, C.; Halazonetis, D.J.; Booij, J.W.; Katsaros, C.

    2011-01-01

    INTRODUCTION: The aim of this study was to assess the changes in inclination of the maxillary second (M2) and third (M3) molars after orthodontic treatment of Class II Division 1 malocclusion with extraction of maxillary first molars. METHODS: Two groups of subjects were studied. The experimental gr

  20. Evaluation and Comparison of Intermaxillary Tooth Size Discrepancy among Class I, Class II Division 1, and Class III Subjects Using Bolton’s Analysis: An in vitro Study

    OpenAIRE

    Prasanna, A Lakshmi; Venkatramana, V; Aryasri, A Srikanth; Katta, Anil Kumar; K. Santhanakrishnan; Maheshwari, Uma

    2015-01-01

    Aim: The aim of the present study was to evaluation and comparison of intermaxillary tooth size discrepancy among Class I, Class II division 1, and Class III subjects using Bolton’s analysis. Materials and Methods: The pre-treatment casts were selected from the records of patients attending the Department of Orthodontics of Meenakshi Ammal Dental College, Chennai. The sample consists of 180 pre-treatment casts with both sexes evenly distributed with 60 casts in each type of malocclusion, i.e....

  1. Treatment outcome for a sample of patients with Class II division 1 malocclusion treated at a regional hospital orthodontic department.

    LENUS (Irish Health Repository)

    Burden, D J

    1998-01-01

    This retrospective study assessed the outcome of orthodontic treatment of 264 patients with Class II division 1 malocclusion (overjet greater than 6 mm). The sample comprised patients who had completed their fixed appliance orthodontic treatment at a regional hospital orthodontic unit in the Republic of Ireland. The PAR Index (Peer Assessment Rating) was used to evaluate treatment outcome using before and after treatment study casts. The results revealed that treatment for this particular type of malocclusion was highly effective with a very few patients failing to benefit from their orthodontic treatment.

  2. The distribution of cervical vertebrae anomalies among dental malocclusions

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    Hasan Kamak

    2015-01-01

    Full Text Available Aims: The aims of our study were to investigate the distribution of cervical vertebrae anomalies (CVAs among dental Angle Class I, II, and III malocclusions in Turkish population and whether a correlation between CVA and dental malocclusion. Materials and Methods: The study was performed on lateral cephalometric radiographs which were taken at the Department of Orthodontics, Faculty of Dentistry, Kirikkale University. The final sample of 318 orthodontic patients was included in the study. Dental malocclusions were performed according to Angle classification. CVAs were categorized: (1 fusion and (2 posterior arch deficiency (PAD. The Chi-square test was used to the analysis of the potential differences among dental malocclusions. Results: The final sample of 318 patients was examined. CVA was observed in 42 individuals (of 26 [8.17%] had fusion and 16 [5.03%] had PAD, with a frequency of 13.2%. Of the 26 fusion defect, 8 (30.7% had Angle Class I, 8 (30.7% had Angle Class II, and 10 (38.4% had Angle Class III malocclusion. Of the 16 PAD, 8 (50% had Angle Class I, 8 (50% had Angle Class II but no patients with Angle Class III malocclusion was observed. The distribution of dental malocclusions regarding CVA was not statistically significant (P = 0.076. Of these 42 individuals with CVA, 52.3% (15 fusions and 7 PAD were females and 47.7% (11 fusions and 9 PAD were males. Conclusion: In our study, the prevalence of fusion and PAD were found 8.1% and 5.0% in Turkish population, respectively. Besides, no statistically significant correlation between CVA and Angle Class I, II, and III malocclusions were found. Our findings support the studies showing no gender dimorphism.

  3. The Relationship between Effects of Skeletal Class III Malocclusion through Maxillary Protraction and Different Skeletal Maturation%对骨性安氏Ⅲ类错采用上颌前方牵引矫治效果与骨龄关系研究

    Institute of Scientific and Technical Information of China (English)

    袁方; 徐红; 王媛媛; 陈雅

    2014-01-01

    Objective:To investigate the relationship between effects of skeletal classmalocclusion through maxillary protraction and different skeletal maturation.Method:From January 2010 to April 2013,55 cases of skeletal classⅢmalocclusion were enrolled in our study and separated into 3 groups according to skeletal maturation,18 cases of skeletal maturation classⅠ-Ⅱas A group,20 cases of skeletal maturation classⅢas B group and 17 cases of skeletal maturation class Ⅳas C group.Result:There was a significant difference in the time of maxillary protraction between 3 groups,A,B,C groups were (4.0±0.5),(5.3±0.4) and (8.9±1.0)months(F=250.0,P0.05),U1-NA was different among three groups,C group was increased significantly(P0.05),U1-NA矫治后差异有统计学意义(P<0.05),C组U1-NA增加较A组和B组明显(P<0.01),A组变化最小,即C组上中切牙唇倾角最大。组内比较,三组SNA、ANB、U1-NA和A-OLp矫治前后差异有统计学意义(P<0.05或P<0.01),A组和B组SNB矫治前后比较差异有统计学意义(P<0.05或P<0.01),其中A组矫治前后差异显著(P<0.01)。结论:骨性安氏Ⅲ类错采用上颌前方牵引矫治应注重骨龄评价。

  4. A modified orthodontic protocol for advanced periodontal disease in Class II division 1 malocclusion.

    Science.gov (United States)

    Janson, Marcos; Janson, Guilherme; Murillo-Goizueta, Oscar Edwin Francisco

    2011-04-01

    An interdisciplinary approach is often the best option for achieving a predictable outcome for an adult patient with complex clinical problems. This case report demonstrates the combined periodontal/orthodontic treatment for a 49-year-old woman presenting with a Class II Division 1 malocclusion with moderate maxillary anterior crowding, a 9-mm overjet, and moderate to severe bone loss as the main characteristics of the periodontal disease. The orthodontic treatment included 2 maxillary first premolar extractions through forced extrusion. Active orthodontic treatment was completed in 30 months. The treatment outcomes, including the periodontal condition, were stable 17 months after active orthodontic treatment. The advantages of this interdisciplinary approach are discussed. Periodontally compromised orthodontic patients can be satisfactorily treated, achieving most of the conventional orthodontic goals, if a combined orthodontic/periodontic approach is used.

  5. Agenesis of maxillary lateral incisor in an Angle Class II, Division 1 malocclusion patient

    Directory of Open Access Journals (Sweden)

    Guilherme Thiesen

    2015-10-01

    Full Text Available The present case report describes the orthodontic treatment of a patient with agenesis of maxillary left lateral incisor and Angle Class II, Division 1 malocclusion. The patient also presented with maxillary midline deviation and inclination of the occlusal plane in the anterior region. Treatment objectives were: correction of sagittal relationship between the maxilla and the mandible; correction of midline deviation, so as to cause maxillary and mandibular midlines to coincide; correction of overbite and leveling of the occlusal plane, so as to create ideal conditions for esthetic rehabilitation of anterior teeth. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as a requirement for the title of certified by the BBO.

  6. Class I malocclusion with severe double rotrusion treated with first premolars extraction

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    Ricardo Moresca

    2014-06-01

    Full Text Available Angle Class I malocclusion with bimaxillary protrusion is characterized by severe buccal tipping of incisors, which causes upper and lower lip protrusion. First premolars extraction is recommended to reduce facial convexity as a result of anterior teeth retraction, which keeps canines and first molars in key to occlusion. In order to yield orthodontic results that are compatible with ideal esthetic and cephalometric outcomes, the space closure phase needs to be carried out with overbite and incisors torque control. The majority of cases also requires maximum anchorage of posterior teeth. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as a requirement for the title of certified by the BBO.

  7. Class I malocclusion treatment: influence of a missing mandibular incisor on anterior guidance.

    Science.gov (United States)

    Barros, Sérgio Estelita C; Janson, Guilherme; Torres, Fernando César; de Freitas, Marcos Roberto; de Almeida, Renato Rodrigues

    2010-07-01

    This case report describes the orthodontic treatment of a patient with a deep-overbite Angle Class I malocclusion, agenesis of a mandibular central incisor, and 2 supernumerary teeth, which caused impaction of the mandibular first premolars. The 15-year-old patient also had a convex profile, maxillary dentoalveolar protrusion, and deficiency of space for the correct alignment of teeth. Therefore, treatment consisted of fixed appliance therapy, cervical headgear, extraction of the supernumeraries and the mandibular and maxillary first premolars, and mesiodistal reduction of the maxillary incisors to solve the arch perimeter discrepancy as much as possible with interproximal stripping. This method of treatment significantly improved the patient's facial and dental esthetics and provided a good functional occlusion, despite the absence of a mandibular incisor, which generally impairs achieving adequate incisal guidance.

  8. Cervical vertebral anomalies in skeletal malocclusions: A cross-sectional study on orthodontic patients at the Aga Khan University Hospital, Pakistan

    Directory of Open Access Journals (Sweden)

    Saman Faruqui

    2014-01-01

    Conclusion: Fusion between C2 and C3 seems to be the most commonly occurring anomaly. This anomaly seems to be more often associated with skeletal Class III than skeletal Class I or Class II malocclusions.

  9. The Study of Soft-Tissue Profile Changes in Patients with Class III Malocclusion after Premolar Extraction Therapy%骨性Ⅲ类错牙合畸形患者拔牙矫治后的软硬组织变化研究

    Institute of Scientific and Technical Information of China (English)

    张红; 王建国; 张锡忠; 魏志强; 郭晨

    2014-01-01

    Objective To investigate the change and correlation between hard-tissue and soft-tissue in patients with class III malocclusion after premolar extraction treatment. Methods Thirty-four adult patients with skeletal classⅢmalocclusion who met the including criteria were included in this retrospective study. The lateral cephalographs were traced and analysed before and after the treatment. Results After orthodontic treatment,the values of long axis of upper incisors and S-N angle (U1-SN) and long axis of lower incisors-mandibular plane (L1-MP) were decreased, and the angle of man-dibular plane (MP-FH) was increased (P<0.01). The SL line was used as a reference, the protrusion of upper incisor (UI-SL) and upper lips (UL-SL) was decreased, and the protrusion of lower incisors (LI-SL) and lower lips (LL-SL) was also de-creased after orthodontic treatment (P<0.05 or P<0.01). There was no significant difference in the relevant measurements of chin. The retraction of upper incisor (△UL-SL) was the only measurement that was positively correlated with upper lip re-traction (△UI-SL). The retraction of upper incisor (△UI-SL) and lower incisor (△LI-SL) were positively correlated with the lower lip retraction (△LL-SL). There was a positive correlation between△UI-SL and△LL-SL. Conclusion The soft-tissue profile improved significantly after four premolars extraction. The change of soft-tissue profile was moderate correlated with hard-tissue.%目的:探讨成人骨性Ⅲ类错牙合畸形患者拔牙矫治后软硬组织变化的相关关系。方法应用回顾性研究方法,选取符合纳入标准的34例成人骨性Ⅲ类错牙合畸形患者,对其头颅侧位片进行测量分析,比较骨性Ⅲ类错牙合畸形患者正畸治疗前后相关测量指标的变化。结果骨性Ⅲ类错牙合畸形患者经过正畸治疗后,上切牙长轴与前颅底平面交角(U1-SN),下切牙长轴与下颌平面角交角(L1-MP)减小,下

  10. Treatment timing of MARA and fixed appliance therapy of Class II malocclusion.

    Science.gov (United States)

    Ghislanzoni, Luis Tomas Huanca; Baccetti, Tiziano; Toll, Douglas; Defraia, Efisio; McNamara, James A; Franchi, Lorenzo

    2013-06-01

    The objective of this study is to evaluate the effect of timing on Mandibular Anterior Repositioning Appliance (MARA) and fixed appliance treatment of Class II malocclusion in a prospective clinical trial. The treated sample consisted of 51 consecutively treated patients at prepubertal (n = 21), pubertal (n = 15), and postpubertal (n = 15) stages of development. Control groups for the three treated groups were generated from growth data of untreated Class II subjects. Lateral cephalograms were digitized and superimposed via cephalometric software at T1 (pre-treatment) and T2 (after comprehensive treatment). The T1-T2 changes in the treated groups were compared to those in their corresponding control groups with Mann-Whitney tests with Bonferroni correction. Mandibular elongation was greater at the pubertal stage (Co-Gn +2.6 mm, with respect to controls). Headgear effect on the maxilla was greater in the pre-peak sample (Co-A -1.9 mm, with respect to controls). Dentoalveolar compensations (proclination of lower incisors, extrusion and mesialization of lower molars, and reduction in the overbite) were significant in the pre-peak and post-peak groups. Optimal timing for Class II treatment with MARA appliance is at the pubertal growth spurt, with enhanced mandibular skeletal changes and minimal dentoalveolar compensations.

  11. Maxillary sinus floor extension and posterior tooth inclination in adolescent patients with Class II Division 1 malocclusion treated with maxillary first molar extractions

    NARCIS (Netherlands)

    Livas, Christos; Halazonetis, Demetrios J.; Booij, Johan Willem; Pandis, Nikolaos; Tu, Yu-Kang; Katsaros, Christos

    2013-01-01

    Introduction: Our objective was to investigate potential associations between maxillary sinus floor extension and inclination of maxillary second premolars and second molars in patients with Class II Division 1 malocclusion whose orthodontic treatment included maxillary first molar extractions. Meth

  12. Maxillary sinus floor extension and posterior tooth inclination in adolescent patients with Class II Division 1 malocclusion treated with maxillary first molar extractions

    NARCIS (Netherlands)

    Livas, C.; Halazonetis, D.J.; Booij, J.W.; Pandis, N.; Tu, Y.K.; Katsaros, C.

    2013-01-01

    INTRODUCTION: Our objective was to investigate potential associations between maxillary sinus floor extension and inclination of maxillary second premolars and second molars in patients with Class II Division 1 malocclusion whose orthodontic treatment included maxillary first molar extractions. METH

  13. Incidence of bridging and dimensions of sella turcica in Class I and III Turkish adult female patients.

    Science.gov (United States)

    Marşan, Gülnaz; Öztaş, Evren

    2009-01-01

    Mineralization of the interclinoid ligament of the sella turcica, or sella turcica bridging, has been associated with severe craniofacial deviations. The aim of this study was to evaluate the incidence of sella turcica bridging, sella turcica dimensions, and skeletal variables in 57 Class I (mean age, 27.2 ± 5.3 years) and 61 Class III (mean age, 25.8 ± 4.6 years) Turkish adult females. Sella bridging was found in three (5%) of the Class I and 11 (18%) of the Class III individuals (Psella turcica bridging and manifest skeletal Class III malocclusions was statistically significant according to the chi-square test (Psella turcica dimensions were found between the Class I and Class III patients. Skeletal variables that differed significantly were SNB (P=.004), ANB (P=.002), and NAPg (P=.000) angles and N-B (P=.030), N-Pg (P=.003), Go-Pg (P=.007), and TM-Pg (P=.002) dimensions.

  14. Assessing Angle's malocclusion among cleft lip and/or palate patients in Jammu

    Science.gov (United States)

    Gupta, Akshay; Gupta, Anur; Bhardwaj, Amit; Vikram, S.; Gomathi, Ajeetha; Singh, Karanprakash

    2016-01-01

    Objective: The study was conducted to examine the patients with abnormalities of cleft lip and/or palate and its association with different types of malocclusion. Materials and Methods: This descriptive study was done among 168 patients with abnormalities of cleft lip and/or palate. Angle's classification of malocclusion was applied for assessment of occlusion as Class I, Class II, and Class III. The types of oral clefts classification such as cleft lip unilateral and cleft lip bilateral, cleft palate (CP), unilateral cleft lip with palate (UCLP) and bilateral cleft lip with palate (BCLP) was considered. Chi-square test was applied to analyze the data at P Class III malocclusion. Conclusion: Cleft lip was the most commonly observed deformity and high frequency of Class II and III malocclusion was evident. Therefore, patients with such abnormalities should be screened timely. PMID:27195223

  15. Measuring Palatal Height in Normal Occlusion and Malocclusions

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    M. Zarringhalam

    2004-12-01

    Full Text Available Statement of Problem: Due to the appearance of palatal height difference in orthodontic patients we decided to carry out this study.Purpose: The purpose of this research was to determine palatal height in persons with normal occlusion and different malocclusions (class I, II Div I and III and comp aring them with each other.Materials and Methods : In this cross sectional research, 240 subjects were selected. Sixty cases (30 girls and 30 boys with normal occlusion within 16-18 years old were selected inrandom cluster sampling from high schools in Mashhad. Examination technique was direct observation, lateral cephalometric radiography, impression and preparing study model for measuring. For every kind of malocclusion 60 young patients, 30 females and 30 males,within the range of 16-20 years old attended orthodontic treatment in private dental offices or Orthodontics Department of Mashhad Dental School .The examination technique was indirect observation, using lateral cephalometry selected of 5395 lateral cephalograms andrelated study models for measuring. Mean, min imum and maximum and height of the palate was initially determined and then normal occlusion was compared with every kind of malocclusion using SPSS statistical software. One way analysis of variance (ANOVA andt-test (independent groups, and also Duncan test were used for comparison.Results: The ANOVA test showed that there were no statistically significant differences between females in normal occlusion and different malocclusions (P=0.486. In boys the palatal height was significantly higher in class III males than class II and class Imalocclusions and the height of palate for normal boys is significantly higher than class I malocclusion (P<0.05. Comparison of other groups was not significantly different.In each group height of palate was significantly lower in females than males (P<0.001.Conclusion: From this research we concluded that palatal height is different in females and males

  16. Changes in soft tissue profile using functional appliances in the treatment of skeletal class II malocclusion

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    Stamenković Zorana

    2015-01-01

    Full Text Available Introduction. The effects of orthodontic treatment are considered to be successful if the facial harmony is achieved, while the structures of soft tissue profile are in harmony with skeletal structures of neurocranium and viscerocranium. In patients with skeletal distal bite caused by mandibular retrognathism, facial esthetics is disturbed often, in terms of pronounced convexity of the profile and change in the position and relationship of the lips. Objective. The aim of this study was to determine the extent of soft tissue profile changes in patients with skeletal Class II malocclusion treated with three different orthodontic appliances: Fränkel functional regulator type I (FR-I, Balters’ Bionator type I and Hotz appliance. Methods. The study included 60 patients diagnosed with skeletal Class II malocclusion caused by mandibular retrognathism, in the period of early mixed dentition. Each subgroup of 20 patients was treated with a variety of orthodontic appliances. On the lateral cephalogram, before and after treatment, the following parameters were analyzed: T angle, H angle, the height of the upper lip, the position of the upper and lower lip in relation to the esthetic line. Within the statistical analysis the mean, maximum, minimum, standard deviation, coefficient of variation, two-factor analysis of variance with repeated measures and the factor analysis of variance were calculated using ANOVA, Bonferroni test and Student’s t-test. Results. A significant decrease of angles T and H was noticed in the application of FR-I, from 21.60° to 17.15°, and from 16.45° to 13.40° (p<0.001. FR-I decreased the height of the upper lip from 26.15 mm to 25.85 mm, while Hotz appliance and Balters’ Bionator type I increased the height of the upper lip, thereby deteriorating esthetics of the patient. Conclusion. All used orthodontic appliances lead to changes in soft tissue profile in terms of improving facial esthetics, with the most distinctive

  17. Variations in cyclic mandibular movements during treatment of Class II malocclusions with removable functional appliances.

    Science.gov (United States)

    Thieme, Kirsten M; Nägerl, Hans; Hahn, Wolfram; Ihlow, Dankmar; Kubein-Meesenburg, Dietmar

    2011-12-01

    The aim of the study was to establish whether juveniles with a Class II malocclusion change the neuromuscular control of mandibular movements during the course of orthodontic treatment with removable functional appliances (RFAs). Neuromuscular control can be indirectly evaluated by recording cyclic planar mandibular movements which were freely carried out by the patients (28 girls, 14 boys, aged 11.1 ± 1.1 years at the start of treatment) and measured with an ultrasonic device before, during, and after Class II functional appliance therapy, with either an activator or a bite jumping plate. The cyclic movements represented simultaneous rotations of the mandible around a maxillary and mandibular fixed axis (MFHA) and could be characterized by μ(α)-diagrams (μ = swing angle of MFHA, α = mouth opening angle) and path length (L) of the MFHA. The μ(α)-diagrams clearly divided into four parts: movement representing protrusion, mouth opening, and two parts of backward closing as known from Posselt diagrams. Parameters from the Posselt and μ(α)-diagrams were checked by one-factor analysis of variance on a 5 per cent significance level for group dependency. For one-third of the patients investigated, no significant changes were seen in any parameter pre- or post-therapy. However, patients showing an initially large mouth opening capacity or a very short condylar path changed their neuromuscular control to that of Class I subjects. Analysis of μ(α)-diagrams provides the possibility of assessing changes in the neuromuscular control of the mandible during Class II treatment.

  18. Skeletal malocclusion: a developmental disorder with a life-long morbidity.

    Science.gov (United States)

    Joshi, Nishitha; Hamdan, Ahmad M; Fakhouri, Walid D

    2014-12-01

    The likelihood of birth defects in orofacial tissues is high due to the structural and developmental complexity of the face and the susceptibility to intrinsic and extrinsic perturbations. Skeletal malocclusion is caused by the distortion of the proper mandibular and/or maxillary growth during fetal development. Patients with skeletal malocclusion may suffer from dental deformities, bruxism, teeth crowding, trismus, mastication difficulties, breathing obstruction and digestion disturbance if the problem is left untreated. In this review, we focused on skeletal malocclusion that affects 27.9% of the US population with different severity levels. We summarized the prevalence of class I, II and III of malocclusion in different ethnic groups and discussed the most frequent medical disorders associated with skeletal malocclusion. Dental anomalies that lead to malocclusion such as tooth agenesis, crowding, missing teeth and abnormal tooth size are not addressed in this review. We propose a modified version of malocclusion classification for research purposes to exhibit a clear distinction between skeletal vs. dental malocclusion in comparison to Angle's classification. In addition, we performed a cross-sectional analysis on orthodontic (malocclusion) data through the BigMouth Dental Data Repository to calculate potential association between malocclusion with other medical conditions. In conclusion, this review emphasizes the need to identify genetic and environmental factors that cause or contribute risk to skeletal malocclusion and the possible association with other medical conditions to improve assessment, prognosis and therapeutic approaches.

  19. Treatment of Class II high angle malocclusions with the Herbst appliance: a cephalometric investigation.

    Science.gov (United States)

    Schiavoni, R; Grenga, V; Macri, V

    1992-11-01

    The purpose of this study was to examine the results of treatment of Class II malocclusions by using two different designs of the Herbst appliance. Cephalometric records from lateral headplates of 19 consecutively treated Class II cases were evaluated. The headplates were taken before and after the treatment stage in which the Herbst appliance was used. The patients were divided into two groups: the first group, normohypodivergent, was treated with the Herbst appliance attached to bands; the second group, hyperdivergent, was treated with the Herbst appliance attached to acrylic splints in which a high-pull headgear was also used. The results were compared between these groups and with a control group age-matched from Bolton standards to match the changes in the Herbst samples against what might be expected in case of normal growth during similar periods of time. The results of the investigation revealed the following: (1) 9 months of treatment resulted in Class I dental arch relationships in all 19 cases; (2) the Herbst appliance attached to bands did not significantly modify the vertical growth pattern of the normohypodivergent patients; and (3) in hyperdivergent patients, the use of a Herbst appliance attached to acrylic splints in conjunction with the use of a high-pull headgear allowed a better control of the vertical dimension, as assessed by the cephalometric parameters (FA, FMA, Go-Gn-SN). The clinician should be aware of the different dentofacial changes induced in the vertical plane by different designs of the Herbst appliance to better program treatment strategy.

  20. A tensor analysis to evaluate the effect of high-pull headgear on Class II malocclusions.

    Science.gov (United States)

    Ngan, P; Scheick, J; Florman, M

    1993-03-01

    The inaccuracies inherent in cephalometric analysis of treatment effects are well known. The objective of this article is to present a more reliable research tool in the analysis of cephalometric data. Bookstein introduced a dilation function by means of a homogeneous deformation tensor as a method of describing changes in cephalometric data. His article gave an analytic description of the deformation tensor that permits the rapid and highly accurate calculation of it on a desktop computer. The first part of this article describes the underlying ideas and mathematics. The second part uses the tensor analysis to analyze the cephalometric results of a group of patients treated with high-pull activator (HPA) to demonstrate the application of this research tool. Eight patients with Class II skeletal open bite malocclusions in the mixed dentition were treated with HPA. A control sample consisting of eight untreated children with Class II who were obtained from The Ohio State University Growth Study was used as a comparison group. Lateral cephalograms taken before and at the completion of treatment were traced, digitized, and analyzed with the conventional method and tensor analysis. The results showed that HPA had little or no effect on maxillary skeletal structures. However, reduction in growth rate was found with the skeletal triangle S-N-A, indicating a posterior tipping and torquing of the maxillary incisors. The treatment also induced additional deformation on the mandible in a downward and slightly forward direction. Together with the results from the conventional cephalometric analysis, HPA seemed to provide the vertical and rotational control of the maxilla during orthopedic Class II treatment by inhibiting the downward and forward eruptive path of the upper posterior teeth. The newly designed computer software permits rapid analysis of cephalometric data with the tensor analysis on a desktop computer. This tool may be useful in analyzing growth changes for

  1. Skeletal and dental Class II malocclusion, with anterior open bite and accentuated overjet

    Directory of Open Access Journals (Sweden)

    Márlio Vinícius de Oliveira

    2012-04-01

    Full Text Available Open bite is defined as a deficiency in normal vertical contact between antagonist teeth and may manifest in a limited region, or more rarely throughout the entire dental arch. If the lack of contact between teeth is located in the incisor and/or canine region when occlusion is in centric relation, it is called anterior open bite (AOB. Some studies have demonstrated that AOB is strongly associated with non-nutritional sucking habit. This article relates the treatment of a female African-Brazilian patient, with 20 years and 7 months of age, who presented Angle's Class II, division 1 malocclusion, AOB, accentuated overjet, lingual interposition during swallowing and difficulty with pronouncing some phonemes. Orthodontic treatment began by mounting an Edgewise Standard fixed appliance system, with a fixed palatal crib appliance and extraction of maxillary first premolars. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO, as part of the requisites to become a BBO Diplomate.

  2. Severe Class II anterior deep bite malocclusion treated with a C-lingual retractor.

    Science.gov (United States)

    Kim, Seong-Hun; Park, Young-Guk; Chung, Kyurhim

    2004-04-01

    A C-lingual retractor was placed on the lingual aspects of the six maxillary anterior teeth in a 24-year-old female patient with a Class II anterior deep-bite malocclusion. The treatment plan consisted of extracting both the upper first premolars and intruding and retracting the upper six anterior teeth. Transpalatal arches were soldered to the upper first and second molar bands and used as an intra-arch anchor unit for upper space closure. Double NiTi closed coil springs were used palatally between the hooks of the C-lingual retractor and the transplantar arches. A high-pull headgear was used for anchorage reinforcement during en masse retraction. It took 14 months to treat this patient. The correct overbite and overjet was obtained by simultaneously intruding and retracting the upper six anterior teeth into their proper positions by C-lingual retractor mechanics, which contributed to an improvement in facial balance. The treatment result was stable 6 months after debonding. The application of this new appliance, consideration in case selection, and sequence of treatment are presented.

  3. Orthodontic retreatment using anchorage with miniplate to camouflage a Class III skeletal pattern

    Directory of Open Access Journals (Sweden)

    Marcel Marchiori Farret

    Full Text Available ABSTRACT This manuscript describes the treatment of a 27-year-old patient who was previously treated with two maxillary first premolar extractions. The patient had skeletal Class III malocclusion, Class III canine relationship, anterior crossbite, and a concave profile. As the patient refused orthognathic surgery, a miniplate was used on the right side of the lower arch as an anchorage unit after the extraction of mandibular first premolars, aiding the retraction of anterior teeth. At the end of treatment, anterior crossbite was corrected, in which first molars and canines were in a Class I relationship, and an excellent intercuspation was reached. Furthermore, patient's profile remarkably improved as a result of mandibular incisor retraction. A 30-month follow-up showed good stability of the results obtained. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as one of the requirements to become diplomate by the BBO.

  4. Orthodontic retreatment using anchorage with miniplate to camouflage a Class III skeletal pattern

    Science.gov (United States)

    Farret, Marcel Marchiori

    2016-01-01

    ABSTRACT This manuscript describes the treatment of a 27-year-old patient who was previously treated with two maxillary first premolar extractions. The patient had skeletal Class III malocclusion, Class III canine relationship, anterior crossbite, and a concave profile. As the patient refused orthognathic surgery, a miniplate was used on the right side of the lower arch as an anchorage unit after the extraction of mandibular first premolars, aiding the retraction of anterior teeth. At the end of treatment, anterior crossbite was corrected, in which first molars and canines were in a Class I relationship, and an excellent intercuspation was reached. Furthermore, patient's profile remarkably improved as a result of mandibular incisor retraction. A 30-month follow-up showed good stability of the results obtained. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) as one of the requirements to become diplomate by the BBO. PMID:27409659

  5. Birth delivery trauma and malocclusion.

    Science.gov (United States)

    Cattaneo, Ruggero; Monaco, Annalisa; Streni, Oriana; Serafino, Vittorio; Giannoni, Mario

    2005-01-01

    The aim of the investigation was to determine the dynamic of birth delivery and relate to dental occlusion among a group of adult subjects. The group studied was made up of 106 subjects (57 females and 49 males) referred for dental diagnosis and treatment. The average age was 26 with a range 22 to 30 years. In data collection and analysis the following were used as measures: dental occlusion (Angle Class I, II div 1, II div 2 and III) and type of delivery (normal, short, long, caesarean and other). Results showed that among 106 subjects 72 (68%) had malocclusion versus 34 (32%) with normal occlusion; 24 subjects (22.6%) have been normal delivery versus 82 (77.4%) with non-normal delivery. Class I is present in 34 subjects (32%), class II division 1 in 26 (24%), class II division 2 in 22. (20%), class III in 16 (14%), and 8 subjects (6%) fall in the section "other". Among 24 subjects with normal delivery 100% presented class I occlusion. However, among 82 subjects with non-normal delivery 10 subjects had a class I (12.2%) and the 72 (87.8%) had in the other classes, are distributed in the various subgroups of non-normal labor/delivery. None of the subjects with a malocclusion have a normal labor/delivery. Better understanding of the connections among osteopathic theory, craniosacral treatment and the outcomes upon dental occlusion, more rigorous evaluations are warranted.

  6. Prevalence of malocclusion and abnormal oral habits in North Indian rural children.

    Science.gov (United States)

    Guaba, K; Ashima, G; Tewari, A; Utreja, A

    1998-03-01

    This epidemiological investigation was conducted on a sample of 3164 rural children aged 6-15 years in Raipur Rani and Naraingarh blocks in the district of Ambala in Haryana. 29. 2 percent of rural children were found to have malocclusion whereas 70.8 per cent had normal occlusion. Class I malocclusion was found to be maximum in 14.4 per cent of children, while malocclusion with class II molar relationship was observed in 13.5 per cent of children. Malocclusion with Class III molar relationship was seen in 1.3 per cent of the population studied. Three per cent of rural children were found to have abnormal oral habits, predominantly tongue thrusting and thumb sucking. The frequency distribution of abnormal oral habits in children with malocclusion was found to be 10.3 per cent.

  7. Facial asymmetry in subjects with skeletal Class III deformity.

    Science.gov (United States)

    Haraguchi, Seiji; Takada, Kenji; Yasuda, Yoshitaka

    2002-02-01

    We investigated the frequency, site, amount, and direction of facial asymmetry in human adults with mandibular prognathism and examined if these characteristics were associated postnatally with cardinal clinical signs that may indicate a predisposition to facial asymmetry. Two hundred twenty young Japanese adults (69 men and 151 women) who exhibited skeletal Class III malocclusions were selected. The sample was divided into a Postnatal Factor Group and a Nonpostnatal Factor Group. The former group included those who had: (1) received orthodontic treatment using a chin cap; (2) exhibited clinical symptoms of temporomandibular joint (TMJ) disorder; (3) reported a history of maxillofacial trauma; or (4) radiographic abnormality of the condyles. Subjects with a deviation of more than 2 mm from the facial midline associated with any of the 4 landmarks (ANS, U1, L1 and Me) were classified as asymmetric and the asymmetry was measured on a postero-anterior (P-A) cephalogram. Radiographic facial asymmetry was found frequently (70%-85%, for Menton), and most obviously in the lower jaw (P Factor Group showed a higher proportion of subjects with lateral deviation toward the right side (P = .0031) and a greater amount (P factor showed no directional uniqueness in jaw deviation and exhibited a longer distance of deviation.

  8. 46 CFR 50.30-20 - Class III pressure vessels.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Class III pressure vessels. 50.30-20 Section 50.30-20... Fabrication Inspection § 50.30-20 Class III pressure vessels. (a) Class III pressure vessels shall be subject... specifically exempted by other regulations in this subchapter. (b) For Class III welded pressure vessels,...

  9. Prevalence of malocclusion among adolescents in Ibadan, Nigeria.

    Science.gov (United States)

    Onyeaso, Chukwudi Ochi

    2004-11-01

    The objective of this study was to determine the prevalence of malocclusion among predominantly Yoruba adolescents in Ibadan, Nigeria, and to compare the results with those of other authors. The sample for this epidemiological survey comprised 636 secondary school students, (334 [52.5%] boys and 302 [47.5%] girls), aged 12-17 years (mean age, 14.72 +/- 1.16 SD). The subjects were randomly selected, and none had received previous orthodontic treatment. Occlusal anteroposterior relationships were assessed based on the Angle classification. Other variables examined were overjet, overbite, crowding, and midline diastema. The results showed that about 24% of the subjects had normal occlusions, 50% had Class I malocclusions, 14% had Class II malocclusions, and 12% had Class III malocclusions. Over 66% had normal overbites, and 14% and 9% had increased and reduced values, respectively. Overjet relationship was normal in 66%, increased in 16%, and decreased in 8%. Crowding was observed in 20% of the subjects and midline diastema in 37%. No statistically significant differences were observed for any occlusal variables (P > .05). Class I malocclusion is the most prevalent occlusal pattern among these Nigerian students. Different patterns of Class II and Class III might be present for the dominant ethnic groups in the country. Therefore, a survey of the occlusal pattern in southeastern Nigerians (Ibo ethnic group) would appear to be worthwhile.

  10. Two-phase treatment of class II malocclusion in young growing patient

    Directory of Open Access Journals (Sweden)

    U S Krishna Nayak

    2011-01-01

    Full Text Available The use of functional jaw orthopedics, at the correct time during growth, can ultimately result in malocclusion patients achieving a broad beautiful smile, an excellent functional occlusion, a full face with a beautiful jaw line and lateral profile. Following is a case report of a young growing individual with mandibular retrognathia. Treatment was planned in two stages with the use of twin block during the first phase for correction of skeletal malocclusion and forward positioning of the mandible, followed by the second phase of fixed pre-adjusted edgewise orthodontic appliance for camouflaging the remaining skeletal discrepancy and achieving a stable harmonious occlusion.

  11. Comparison of esthetic outcome after extraction or non-extraction orthodontic treatment in class II division 1 malocclusion patients

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    Sneh Lata Verma

    2013-01-01

    Full Text Available Introduction: The extraction of premolars as a practical form of orthodontic therapy has been accepted for many years, but there remains a controversy regarding the effect of premolar extraction to improve esthetics as well as dentoskeletal relationship. The esthetic impact of the soft-tissue profile might play a major role in deciding on premolar extraction or non-extraction treatment, particularly in borderline patients. This cephalometric study was undertaken to compare the post-treatment soft-tissue profiles of successfully managed Class II, Division 1 malocclusions treated with either all first premolar extractions or treatment with a non-extraction therapy. Materials and Methods: The sample consisted of 100 post-pubertal female patients of Class II Division I malocclusion. Group 1, treated with four first premolar extractions, consisted of 50 female patients with a mean age of 14 years 1 month. Group 2, treated without extractions, consisted of 50 patients with a mean age of 13 years 5 months. Pre-treatment and post-treatment lateral cephalometric radiographs were evaluated. The pre-treatment to post-treatment stage comparison and the intergroup comparison of the treatment changes were conducted between extraction and non-extraction groups of Class II malocclusion samples with t-tests. Results: The soft-tissue facial profiles of the extraction and non-extraction samples were the same following active treatment except for a more retruded lower lip and a more pronounced lower labial sulcus in those patients subjected to extraction. Conclusions: The extraction or non-extraction decision, if based on sound diagnostic criteria, seems to have no systematic detrimental effects on the facial profile.

  12. Changes of hyoid bone position following treatment of class II div1 malocclusion with Farmand functional appliance

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    Yassaei S

    2007-01-01

    Full Text Available Background and Aim: Unlike other bones of the head and neck, hyoid bone has no bony articulations. It is connected to mandible, cranium and pharynx through muscles and ligaments. During treatment with functional appliance in patients with class II div1 malocclusion, mandible is positioned in inferior and anterior direction. Regarding the relation between hyoid and mandibular bone, alterations of hyoid bone position can be a result of functional appliance therapy. The aim of this study was to evaluate the changes of hyoid bone position following treatment with Farmand functional appliance in patients with class II div 1 malocclusion. Materials and Methods: In this before-after clinical trial, 28 patients with class II div 1 malocclusion which were under treatment with Farmand functional appliance for 11 months were selected. Facial growth in vertical, normal or horizontal direction was determined by cephalometric measurement. Data were analyzed with Paired-t test to compare the differences of mean values pre and post treatment. Variance analysis was used to compare the three growth patterns. P<0.05 was considered as the limit of significance. Results: Hyoid bone shifted significantly forward in horizontal dimension (P<0.01 and non-significantly upward in vertical dimension. There was no significant difference among the three studied groups with respect to hyoid bone position alterations in horizontal dimension but significant difference was observed between horizontal and vertical growth pattern in vertical dimension (P<0.05. There was significant correlation between decrease of ANB angle and forward movement of hyoid bone. Conclusion: Based on the results of this study, treatment with Farmand functional appliance (Fa II leads to significant alterations in the position and anterior displacement of the hyoid bone.

  13. C-orthodontic microimplant for distalization of mandibular dentition in Class III correction.

    Science.gov (United States)

    Chung, Kyurhim; Kim, Seong-Hun; Kook, Yoonah

    2005-01-01

    A 16-year-old male patient with a Class III malocclusion and 2 lower missing central incisors presented for treatment. The treatment plan consisted of asymmetrically distalizing the lower dentition and regaining space for lower anterior prosthetic work. C-implants were to be used as anchorage for Class III intermaxillary elastics, and two C-orthodontic microimplants (C-implants) were placed in the interdental spaces between the upper second premolars and first molars. The particular design of the C-implant head minimized gingival irritation during the orthodontic treatment. Sliding jigs were applied on the buccal for distalization of the lower posterior teeth. The correct overbite and overjet were obtained by distalizing the entire lower dentition into its proper position with C-implant anchorage, which contributed to an improvement in facial balance. It took 15 months to treat this case. The application of this new microimplant, considerations for case selection, and the sequence of treatment are presented.

  14. Changes in skeletal and dental relationship in Class II Division I malocclusion after rapid maxillary expansion: a prospective study

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    Carolina Baratieri

    2014-06-01

    Full Text Available OBJECTIVE: To assess skeletal and dental changes immediately after rapid maxillary expansion (RME in Class II Division 1 malocclusion patients and after a retention period, using cone beam computed tomography (CBCT imaging. METHODS: Seventeen children with Class II, Division 1 malocclusion and maxillary skeletal transverse deficiency underwent RME following the Haas protocol. CBCT were taken before treatment (T1, at the end of the active expansion phase (T2 and after a retention period of 6 months (T3. The scanned images were measured anteroposteriorly (SNA, SNB, ANB, overjet and MR and vertically (N-ANS, ANS-Me, N-Me and overbite. RESULTS: Significant differences were identified immediately after RME as the maxilla moved forward, the mandible moved downward, overjet increased and overbite decreased. During the retention period, the maxilla relapsed backwards and the mandible was displaced forward, leaving patients with an overall increase in anterior facial height. CONCLUSION: RME treatment allowed more anterior than inferior positioning of the mandible during the retention period, thus significantly improving Class II dental relationship in 75% of the patients evaluated.

  15. Correction of a skeletal Class II malocclusion with severe crowding by a specially designed rapid maxillary expander.

    Science.gov (United States)

    Wang, Honghong; Feng, Jing; Lu, Peijun; Shen, Gang

    2015-02-01

    To correct an Angle Class II malocclusion or to create spaces in the maxillary arch by nonextraction treatment, distal movement of the maxillary molars is required. Various modalities for distalizing the buccal segment have been reported. Conventional extraoral appliances can be used to obtain maximum anchorage. However, many patients reject headgear wear because of social and esthetic concerns, and the success of this treatment depends on patient compliance. Intraoral appliances, such as repelling magnets, nickel-titanium coils, pendulum appliance, Jones jig appliance, distal jet appliance, and modified Nance appliance, have been introduced to distalize the molars with little or no patient cooperation. However, intraoral appliances can result in anchorage loss of the anterior teeth and distal tipping of the maxillary molars. In this case report, we introduce a diversified rapid maxillary expansion appliance that was custom designed and fabricated for the treatment of a growing girl with a skeletal Class II malocclusion and severe crowding from a totally lingually positioned lateral incisor. The appliance concomitantly expanded the maxilla transversely and retracted the buccal segment sagittally, distalizing the maxillary molars to reach a Class I relationship and creating the spaces to displace the malpositioned lateral incisor. The uniqueness of this special diversified rapid maxillary expansion appliance was highlighted by a series of reconstructions and modifications at different stages of the treatment to reinforce the anchorage.

  16. Evaluation of the position of lower incisors in the mandibular symphysis of individuals with Class II malocclusion and Pattern II profiles

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    Djalma Roque Woitchunas

    2012-06-01

    Full Text Available OBJECTIVES: This study evaluated the position of mandibular incisors in the mandibular symphysis of individuals with Class II malocclusion and Pattern II profiles. METHODS: The sample consisted of 40 Caucasian patients (20 male and 20 female with Class II malocclusion and Pattern II profile from 10 to 18 years of age (mean age of 12.84 years who were selected from the records of the School of Dentistry of Universidade de Passo Fundo, Brazil. The linear cephalometric measurements used in this study were Ricketts' 1- AP, Interlandi's line I and Vigorito's 1-VT; and the angular measurement studied was the mandibular plane angle (IMPA. RESULTS: Mandibular incisors of individuals with Class II malocclusion and Pattern II profile tended to be buccally inclined and protruded.

  17. Expression of insulin-like growth factor-1in bony classmalocclusion%胰岛素样生长因子-1在骨性Ⅲ类错(牙合)畸形中的表达

    Institute of Scientific and Technical Information of China (English)

    陈允嘉; 李艳; 王豫蓉; 秘双燕; 吴增波; 王强; 颜婕

    2012-01-01

    Objective To study the expression of ICF-1 in bony class III malocclusion patients and its relationship with growth of mandible. Methods Twenty-four bony class III malocclusion patients and 27 bony class I malocclusion patients were included in this study. Expression of IGF-1 in mandible tissue was detected by RT-PCR and ELJSA, respectively. Results RT-PCR showed that the expression level of IGF-1 mRNA was significantly higher in bony class M malocclusion patients than in bony class I malocclusion patients (5.541 0 ± 2. 044 7 μg/μl vs 1.282 1 ±0.273 1 μg/μl, P <0. 05) . The regression factor was 0.998, which was calculated according to the correlation curve for IGF-1 optical density value and its concentration. ELISA showed that the expression level of IGF-1 protein was significantly higher in bony class malocclusion patients than in bony class I malocclusion patients (84.125 9 ±29.294 7 ng/L is 22.406 4 ±4.931 2 ng/L, P <0.05). Conclusion The more the mandible grows, the higher the expression level of IGF-1 is, which indicates that IGF-1 plays an important role in growth of mandible condyloid cartilage.%目的 研究在下颌骨发育过度导致的骨性Ⅲ类错(牙合)畸形患者中,胰岛素样生长因子-1(IGF-1)基因的表达,探讨IGF-1基因表达与下颌骨生长的关系.方法 选取骨性Ⅲ类错(牙合)畸形患者27例,骨性Ⅰ类患者(包括个别正常(牙合))27例,应用荧光定量PCR技术和酶联免疫吸附剂测定(ELISA)技术研究下颌骨中IGF-1基因的表达变化.结果 RT-PCR检测结果显示,骨性Ⅲ类错(牙合)畸形组中IGF-1mRNA的表达量为(5.5410±2.044 7)μg/μl,骨性Ⅰ类组中IGF-1mRNA的表达量为(1.2821±0.273 1)μg/μl,2组比较具有统计学差异(P<0.05).根据1GF-1基因光密度值与浓度关系曲线,得回归系数0.998.ELISA检测结果显示,骨性Ⅲ类错(牙合)畸形组中IGF-1蛋白浓度为(84.1259±29.294 7) ng/L,骨性Ⅰ类组中IGF-1蛋白浓度为(22.406 4±4.9312) ng

  18. Prevalence of malocclusion in schoolchildren in the municipality of Campinas, São Paulo, Brazil

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    Cassiano Arashiro

    2009-12-01

    Full Text Available Objective: To evaluate the prevalence and types of malocclusion in schoolchildren in the municipality of Campinas, São Paulo, Brazil.Method: Six hundred and sixty schoolchildren at three schools in the municipality of Campinas were examined. The age bracket ranged from 6.5 up to18.1 years (mean ± s.d. = 12.2 ± 2.3 years The intraoral clinical exams were performed by four duly trained and calibrated dentists, consisted of visual inspection using only disposable wooden spatulas and millimetric probes, performed in rooms provided by the schools, with good conditions of visibility and natural lighting. The criteria adopted for classifying normal and malocclusion were those stipulated by Andrews1, Angle2 and Maia3. Results: The data obtained indicated that there was no statistically significant difference between the genders. Malocclusion was found in 87.4% of the schoolchildren examined, in agreement with the majority of Brazilian and International studies. Class I malocclusion was the most prevalent (39.7% among the schoolchildren examined, followed by Class II, with 36% of the cases, and there was higher prevalence of Class II division 1 (22.7% in comparison with Class II division 2 (13.3%. Class III malocclusion was present in 11.7% of the sample.Conclusion: There is high prevalence of malocclusion, irrespective of gender, in the studied population of schoolchildren. The most prevalent malocclusion was Class I, followed by Class I division 1.

  19. Distalization of maxillary molars for Classmalocclusion with Chinese Ni-Ti coil-springs appliance

    Institute of Scientific and Technical Information of China (English)

    DUAN Yin-zhong; WU Jun-jie; CHEN Xue-peng; QIAN Hong

    2005-01-01

    Objective: To evaluate the effects of the Chinese Ni-Ti coil springs appliance on distalization of maxillary molars and the reciprocal effects on the anchorage teeth. Methods :Twenty four adolescent patients(12 boys,12 girls) with Classmalocclusion were selected and the coil springs appliance was used during the treatment. Pre and postdistalization lateral cephalometric radiographs were analyzed and compared. Results: The average time for the correction of Class Ⅱ molar relationship was 4. 6 months. And the mean distance of molar distalization was 4.4 mm. The Chinese Ni-Ti coil springs also demostrated less tipping and better bodily movement of maxillary molars. Conclusion: This study suggests that the Chinese Ni-Ti coil-springs appliance distalizes the upper molar significantly, while there is no remarkable loss of anchorage because of patients' wearing headgear with J hooks at night and Class Ⅱ elastics in the day time.

  20. Dental and orthopedic effects of high-pull headgear in treatment of Class II, division 1 malocclusion.

    Science.gov (United States)

    Firouz, M; Zernik, J; Nanda, R

    1992-09-01

    In the present study a prospective cephalometric investigation was undertaken to examine the skeletal and dental effects of the high-pull extraoral appliance, when the resultant force was directed through the level of trifurcation of the maxillary molars. Twelve adolescent patients with Class II, Division 1 malocclusions were selected for the study. Each patient wore the headgear for a 6-month period, an average of 12 hours a day. A group of untreated adolescent patients with Class II, Division 1 malocclusions who were in a similar age range, as well as skeletal and dental characteristics were chosen as controls. Lateral cephalometric films were taken before and after the 6-month treatment period, and before and after the observation period in the control group of patients. Our data indicate that by directing the force of the headgear approximately through the center of resistance of the maxillary molars, it is possible to accomplish simultaneously a substantial distal movement of the molars (2.6 +/- 0.6 mm), as well as significant intrusion (0.54 +/- 0.54 mm). In addition, our results demonstrate that the applied force of 500 gm was sufficient to initiate maxillary orthopedic changes in the treated patients. These changes include relative restriction of horizontal and vertical maxillary growth, as well as distal movement (mean: 0.8 mm) of the maxillary anterior border in the treatment group relative to an untreated control group. Such orthopedic changes have been previously described only in association with much higher force levels.

  1. 25 CFR 502.4 - Class III gaming.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 2 2010-04-01 2010-04-01 false Class III gaming. 502.4 Section 502.4 Indians NATIONAL INDIAN GAMING COMMISSION, DEPARTMENT OF THE INTERIOR GENERAL PROVISIONS DEFINITIONS OF THIS CHAPTER § 502.4 Class III gaming. Class III gaming means all forms of gaming that are not class I gaming or...

  2. Skeletal maturation of the cervical vertebrae: association with various types of malocclusion.

    Science.gov (United States)

    Armond, Mônica Costa; Generoso, Rodrigo; Falci, Saulo Gabriel Moreira; Ramos-Jorge, Maria Letícia; Marques, Leandro Silva

    2012-01-01

    The identification of the skeletal maturation stage of the cervical vertebrae has proven an important reference for orthodontic diagnosis. The aim of the present study was to determine the association between the skeletal maturation stage of the cervical vertebrae and types of malocclusion according to the age and gender of participants. A total of 361 individuals (168 males and 193 females) between 8 and 14 years of age were selected from a convenience sample. Malocclusions were diagnosed through study models using the Angle classification. Maturation stages of the cervical vertebrae were determined using the method proposed by Hassel and Farman. Statistical analysis involved the chi-square test (p £ 0.05) and multiple logistic regression (forward stepwise procedure). Significant differences were observed between the stage of skeletal maturation of the cervical vertebrae and gender at ages 11, 12 and 14 years. Males with Class II malocclusion were twice as likely to be in Stage 1 or 2 of cervical vertebra maturation than individuals with Class I malocclusion (OR = 2.1 [CI 95%, 1.33-3.18]). There were no differences between individuals with Class I and Class III malocclusions. The association between skeletal maturation of the cervical vertebrae and type of malocclusion was significant, suggesting a skeletal component in the determination of Class II malocclusions.

  3. [Orthodontics in general practice 3. Angle Class II/1 malocclusion: one-phase treatment treatment preferred to two-phase treatment

    NARCIS (Netherlands)

    Kuijpers, M.A.; Kuijpers-Jagtman, A.M.

    2008-01-01

    With regard to the optimal treatment timing for children with an Angle Class II division 1 malocclusion, there is an ongoing controversy on the effectiveness of a two-phase or a one-phase therapy. Two-phase treatment involves a first phase to correct the jaw relationship starting at the age of 7 to

  4. Oral myofunctional and electromyographic evaluation of the orbicularis oris and mentalis muscles in patients with class II/1 malocclusion submitted to first premolar extraction

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    Denize Ramirez de Souza

    2008-06-01

    Full Text Available OBJECTIVE: The aim of this study was to assess the presence of oral myofunctional alterations before and after first premolar extraction in Class II/1 malocclusion patients that could endanger the long-term dental arch stability. MATERIAL AND METHODS: The study was performed by means of morphological, functional and electromyographic analyses in 17 Class II/1 malocclusion patients (group T and 17 Class I malocclusion patients (group C -control, both groups with 12-30-year age range (mean age: 20.93 ± 4.94 years. RESULTS: Data analyzed statistically by Student's t-test showed a significant decrease (p0.05. The Kruskal-Wallis test analyzed data from lip posture (orbicularis oris muscle at rest and during swallowing, as well as the mentalis muscle behavior during the above-mentioned function, not showing statistically significant differences (p>0.05 after treatment (groups T1 and T2. However, group T differed significantly from group C (p<0.05. Lip posture during swallowing showed statistically significant differences (p<0.05 for subjects submitted to orthodontic therapy when compared to data acquired before the treatment. The electromyographic analysis confirmed these data. CONCLUSIONS: Found myofunctional alterations observed after the orthodontic treatment in Class II/1 malocclusion seemed to jeopardize the long-term orthodontic stability, making recurrence possible.

  5. Oral myofunctional and electromyographic evaluation of the anterior suprahyoid muscles and tongue thrust in patients with Class II/1 malocclusion submitted to first premolar extraction

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    Denize Ramirez de Souza

    2007-02-01

    Full Text Available OBJECTIVE: The aim of this study was to assess the existence of myofunctional alterations before and after first premolar extraction in Class II/1 malocclusion patients that could endanger the long-term dental arch stability. MATERIAL AND METHODS: The study was performed by means of morphological, functional and electromyographic analyses in 17 Class II/1 malocclusion patients (group T and 17 Class I malocclusion patients (group C, both groups with 12-30-year age range (mean age: 20.93 ± 4.94 years. RESULTS: Data analyzed statistically by Student's t-test showed a significant decrease in the maxillary and mandibular dental arch perimeters after orthodontic treatment (p0.05. However, group T differed significantly from group C (p<0.05. The electromyographic data showed that the anterior right and left suprahyoid muscles acted synergistically in both groups, while having a lower myoelectric activity in group T during swallowing. CONCLUSIONS: Myofunctional alterations observed after the orthodontic treatment in Class II/1 malocclusion seemed to jeopardize the long-term orthodontic stability, making recurrence possible. Further research should be conducted to compare electromyographic data before and after orthodontic treatment in order to corroborate the results of the present investigation.

  6. Assessment of the orthodontic knowledge demonstrated by dental school undergraduates: recognizing the key features of Angle Class II, Division 1 malocclusion

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    Cristiane Canavarro

    2012-02-01

    Full Text Available OBJECTIVE: To investigate the ability of undergraduate students in diagnosing Angle Class II malocclusion and evaluate the clinical approach of these students toward a patient displaying this condition. METHODS: The sample consisted of 138 students attending the last semester of 10 dental schools in the State of Rio de Janeiro/Brazil assessed by questionnaires with closed questions. They were presented with photographs and dental casts of a patient in the mixed dentition, with Angle Class II malocclusion, increased overjet and overbite, deviated dental midlines and anterior diastemas in the upper arch. RESULTS: It was found that students easily identified increased overjet (92% of students, followed by the presence of diastemas (89%, midline deviation (84.7% and increased overbite (77.3%. Conversely, approximately half the sample (n=70 or 51% of the students were able to identify bilateral Angle Class II malocclusion. Nearly all agreed on the need for treatment and that it should be provided by a specialist (n=131 or 95%, but found it difficult to determine the ideal moment to start orthodontic treatment: 48.9% of the sample would begin treatment at the end of the mixed dentition, 41.7% would indicate treatment during deciduous dentition and 7.9% during permanent dentition. CONCLUSIONS: On completion of their undergraduate courses, students encounter difficulties in diagnosing Class II and even find it hard to articulate ideas about a basic treatment protocol to correct this malocclusion.

  7. Má oclusão Classe II, 2ª Divisão de Angle, com sobremordida acentuada Angle Class II, Division 2, malocclusion with deep overbite

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    Paulo Renato Carvalho Ribeiro

    2010-02-01

    Full Text Available Este relato de caso descreve o tratamento ortodôntico de uma paciente adulta, portadora de uma má oclusão Classe II, 2ª Divisão de Angle, com sobremordida e curva de Spee acentuadas e que apresentava vestibuloversão do dente 12 e algumas recessões gengivais. A paciente foi tratada com exodontia dos primeiros pré-molares superiores e máximo controle de ancoragem. Esse caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 6, ou seja, uma má oclusão com sobremordida acentuada, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.This case report describes the orthodontic treatment of an adult patient, who presented a Angle Class II, Division 2, malocclusion, with overbite, severe curve of Spee, right maxillary lateral incisor proclined and gengival recessions. The patient was treated with extraction of the first premolars and maximum anchorage control. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO representing the category 6, deep overbite malocclusion, as part of the requirements for obtaining the title of Diplomate by BBO.

  8. Características cefalométricas de pacientes portadores de más oclusões Classe I e Classe II de Angle Cephalometric characteristics of patients with Angle Class I and Class II malocclusions

    Directory of Open Access Journals (Sweden)

    Rogério Lacerda dos Santos

    2009-06-01

    Full Text Available OBJETIVOS: o presente estudo comparou algumas medidas cefalométricas relacionadas às características faciais em pacientes com má oclusão Classe I, Classe II 1ª divisão e Classe II 2ª divisão. METODOLOGIA: foram selecionadas 130 telerradiografias de pacientes leucodermas em fase inicial de tratamento ortodôntico, com idades entre 10 e 16 anos (média de 12,6 anos; e divididos em 3 grupos. As medidas cefalométricas utilizadas neste estudo foram: ANB, ı-SN, IMPA, AML, Ls-ı, Li-ī e EI. A análise de variância e o teste de Tukey foram realizados nas medidas ANB, IMPA, AML, ı-SN e Li-ī. Para as demais variáveis (EI e Ls-ı foi utilizado o teste de Kruskal Wallis e Dunn. RESULTADOS: os resultados mostraram que as medidas Ls-ı e EI tiveram diferença estatisticamente significativa entre os grupos I e II-1 e entre os grupos II-1 e II-2 (p AIM: The present study compared some cephalometric measurements related to facial characteristics in patients having Class I, Class II division 1, and Class II division 2 malocclusions. METHODS: One hundred and thirty teleradiographs of Caucasian patients aged 10-16 years (mean age of 12.6 years under initial orthodontic treatment were selected for study and divided into 3 groups. The cephalometric measurements used in the present study were the following: ANB, ı-SN, IMPA, AML, Ls-ı, Li-ī, and EI. Variance analysis and Tukey's test were carried out for ANB, IMPA, AML, ı-SN, and Li-ī measurements, whereas Kruskal-Wallis and Dunn's tests were used for EI and Ls-ı. RESULTS: Statistically significant differences were found for EI and Ls-ı measurements when Group II-1 was compared to Group I and Group II-2 (p < 0.05. ANB and IMPA measurements also had statistically significant differences when Group I was compared to Group II-1 and Group II-2 (p < 0.05. The measurement ı-SN had statistically significant differences between the 3 groups (p < 0.05. CONCLUSIONS: One can conclude that the measurement

  9. Two-Step Extraction of the Lower First Molar for Class III Treatment in Adult Patient

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    Kélei Cristina de Mathias Almeida

    2016-01-01

    Full Text Available The aim of this article is to describe a case report of Class III malocclusion treatment with lower first molar extraction. The 27-year-old Caucasian male patient presented a symmetric face with a straight profile, hyperdivergent growth pattern, molar and cuspid Class III relation, and an anterior crossbite as well as a mild crowding on cuspids area, in both upper and lower arches and a tendency to posterior crossbite. The treatment was performed by the use of Haas expansion appliance followed by an initial alignment and leveling of the upper and lower arches with a fixed edgewise appliance, extraction of lower teeth aiming the correction of the incisors proclination and end the treatment with a Class I molar relationship. It resulted in a significant change in the patient’s profile, dentoalveolar Class III correction, upper arch expansion, leveling and alignment of the upper and lower arches, and improvement of tipping of the upper and lowers incisors. In cases of a dentoalveolar compensation in well positioned bone bases the treatment with fixed appliances is an alternative and extraction of lower teeth is considered.

  10. Two-Step Extraction of the Lower First Molar for Class III Treatment in Adult Patient

    Science.gov (United States)

    Paulin, Ricardo Fabris; Raveli, Taísa Barnabé; Raveli, Dirceu Barnabé

    2016-01-01

    The aim of this article is to describe a case report of Class III malocclusion treatment with lower first molar extraction. The 27-year-old Caucasian male patient presented a symmetric face with a straight profile, hyperdivergent growth pattern, molar and cuspid Class III relation, and an anterior crossbite as well as a mild crowding on cuspids area, in both upper and lower arches and a tendency to posterior crossbite. The treatment was performed by the use of Haas expansion appliance followed by an initial alignment and leveling of the upper and lower arches with a fixed edgewise appliance, extraction of lower teeth aiming the correction of the incisors proclination and end the treatment with a Class I molar relationship. It resulted in a significant change in the patient's profile, dentoalveolar Class III correction, upper arch expansion, leveling and alignment of the upper and lower arches, and improvement of tipping of the upper and lowers incisors. In cases of a dentoalveolar compensation in well positioned bone bases the treatment with fixed appliances is an alternative and extraction of lower teeth is considered. PMID:27699072

  11. AUTOCLASS III - AUTOMATIC CLASS DISCOVERY FROM DATA

    Science.gov (United States)

    Cheeseman, P. C.

    1994-01-01

    The program AUTOCLASS III, Automatic Class Discovery from Data, uses Bayesian probability theory to provide a simple and extensible approach to problems such as classification and general mixture separation. Its theoretical basis is free from ad hoc quantities, and in particular free of any measures which alter the data to suit the needs of the program. As a result, the elementary classification model used lends itself easily to extensions. The standard approach to classification in much of artificial intelligence and statistical pattern recognition research involves partitioning of the data into separate subsets, known as classes. AUTOCLASS III uses the Bayesian approach in which classes are described by probability distributions over the attributes of the objects, specified by a model function and its parameters. The calculation of the probability of each object's membership in each class provides a more intuitive classification than absolute partitioning techniques. AUTOCLASS III is applicable to most data sets consisting of independent instances, each described by a fixed length vector of attribute values. An attribute value may be a number, one of a set of attribute specific symbols, or omitted. The user specifies a class probability distribution function by associating attribute sets with supplied likelihood function terms. AUTOCLASS then searches in the space of class numbers and parameters for the maximally probable combination. It returns the set of class probability function parameters, and the class membership probabilities for each data instance. AUTOCLASS III is written in Common Lisp, and is designed to be platform independent. This program has been successfully run on Symbolics and Explorer Lisp machines. It has been successfully used with the following implementations of Common LISP on the Sun: Franz Allegro CL, Lucid Common Lisp, and Austin Kyoto Common Lisp and similar UNIX platforms; under the Lucid Common Lisp implementations on VAX/VMS v5

  12. 25 CFR 522.12 - Revocation of class III gaming.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 2 2010-04-01 2010-04-01 false Revocation of class III gaming. 522.12 Section 522.12 Indians NATIONAL INDIAN GAMING COMMISSION, DEPARTMENT OF THE INTERIOR APPROVAL OF CLASS II AND CLASS III ORDINANCES AND RESOLUTIONS SUBMISSION OF GAMING ORDINANCE OR RESOLUTION § 522.12 Revocation of class...

  13. Arch width changes in patients with Class II division 1 malocclusion treated with maxillary first premolar extraction and non-extraction method

    OpenAIRE

    Shirazi, Sajjad; Kachoei, Mojgan; Shahvaghar-Asl, Naiemeh; Shirazi, Samaneh; Sharghi, Reza

    2016-01-01

    Background The aim of this study was to determine arch width changes during maxillary first premolars extraction and non-extraction treatment in patients with Class II division 1 malocclusion. Material and Methods Dental casts of 91 Class II division 1 patients (36 males and 55 females) were evaluated. The minimum age of the subjects at the beginning of treatment was above 16 years. 48 patients were treated with extraction of the maxillary first premolars and 43 patients were treated without ...

  14. Comparison of Natural Head Position in Different Anteroposterior Malocclusions

    Science.gov (United States)

    Hedayati, Zohreh; Paknahad, Maryam; Zorriasatine, Farbod

    2013-01-01

    Objective: The facial esthetics after orthodontic treatment and orthognathic surgery may be affected by the patient’s natural head position. The purpose of this study was to evaluate the natural head position for the three skeletal classes of malocclusion. Materials and Methods: Our sample consisted of 102 lateral cephalometric radiographs of patients aged 15 to 18 years; class I (n=32), class II (n=40) and class III (n=30). Nine landmarks of the craniofacial skeleton and three landmarks of the cervical vertebrae were determined. Variables consisted of two angles for cervical posture (OPT/Hor and CVT/Hor), three angles for craniofacial posture (SN/Ver, PNS-ANS/Ver, and ML/Ver ) and five for craniofacial angulation (SN/OPT, SN/CVT, PNS-ANS/OPT, PNS-ANS/CVT, ML/CVT). The data were analyzed statistically using ANOVA and post hoc tests. Results: PNS-ANS/Ver and SN/Ver differed significantly (p<0.05) among the three groups. There were no significant differences between class I and class II malocclusions for the indicator angles of cranial posture except for ML/Ver. The SN/CVT was significantly different for class I compared to class III patients. A head posture camouflaging the underlying skeletal class III was observed in our population. Conclusion: A more forward head posture was observed in skeletal class III participants compared to skeletal class I and II and that class III patients tended to incline their head more ventral compared to class I participants. These findings may have implications for the amount of jaw movements during surgery particularly in patients with a class III malocclusion. PMID:25512747

  15. Comparison of Natural Head Position in Different Anteroposterior Malocclusions

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    Zohreh Hedayati

    2013-01-01

    Full Text Available Objective: The facial esthetics after orthodontic treatment and orthognathic surgery may be affected by the patient’s natural head position. The purpose of this study was to evaluate the natural head position for the three skeletal classes of malocclusion.Materials and Methods: Our sample consisted of 102 lateral cephalometric radiographs of patients aged 15 to 18 years; class I (n=32, class II (n=40 and class III (n=30. Nine landmarks of the craniofacial skeleton and three landmarks of the cervical vertebrae were determined. Variables consisted of two angles for cervical posture (OPT/Hor and CVT/Hor, three angles for craniofacial posture (SN/Ver, PNS-ANS/Ver, and ML/Ver and five for craniofacial angulation (SN/OPT, SN/CVT, PNS-ANS/OPT, PNS-ANS/CVT, ML/CVT. The data were analyzed statistically using ANOVA and post hoc tests.Results: PNS-ANS/Ver and SN/Ver differed significantly (p<0.05 among the three groups. There were no significant differences between class I and class II malocclusions for the indicator angles of cranial posture except for ML/Ver. The SN/CVT was significantly different for class I compared to class III patients. A head posture camouflaging the underlying skeletal class III was observed in our population.Conclusion: A more forward head posture was observed in skeletal class III participants compared to skeletal class I and II and that class III patients tended to incline their head more ventral compared to class I participants. These findings may have implications for the amount of jaw movements during surgery particularly in patients with a class III malocclusion

  16. Factors influencing soft tissue profile changes following orthodontic treatment in patients with Class II Division 1 malocclusion

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    Suhatcha Maetevorakul

    2016-05-01

    Full Text Available Abstract Background Several studies have shown soft tissue profile changes after orthodontic treatment in Class II Division 1 patients. However, a few studies have described factors influencing the soft tissue changes. The purpose of this study was to investigate the factors influencing the soft tissue profile changes following orthodontic treatment in Class II Division 1 patients. Methods The subjects comprised 104 Thai patients age 8–16 years who presented Class II Division 1 malocclusions and were treated with different orthodontic modalities comprising cervical headgear, Class II traction and extraction of the four first premolars. The profile changes were evaluated from the lateral cephalograms before and after treatment by means of the X-Y coordinate system. Significant soft tissue profile changes were evaluated by paired t test at a 0.05 significance level. The correlations among significant soft tissue changes and independent variables comprising treatment modality, age, sex, pretreatment skeletal, dental and soft tissue morphology were evaluated by stepwise multiple regression analysis at a 0.05 significance level. Results The multiple regression analysis indicated that different treatment modalities, age, sex, pretreatment skeletal, dental and soft tissue morphology were related to the profile changes. The predictive power of these variables on the soft tissue profile changes ranged from 9.9 to 40.3 %. Conclusions Prediction of the soft tissue profile changes following treatment of Class II Division 1 malocclusion from initial patient morphology, age, sex and types of treatment was complicated and required several variables to explain their variations. Upper lip change in horizontal direction could be found only at the stomion superius and was less predictable than those of the lower lip. Variations in upper lip retraction at the stomion superius were explained by types of treatment (R 2 = 0.099, whereas protrusion of the lower

  17. Determination of the relative parallelism of occlusal plane to three ala-tragal lines in various skeletal malocclusions: A cephalometric study

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    Shashinandan K Venugopalan

    2012-01-01

    Results: The result from the present study showed that in Class I and Class III malocclusion, the line drawn from the lower border of ala of the nose to the inferior position of the tragus (Camper′ plane C was relatively parallel to occlusal plane; and, in Class II malocclusion, the line drawn from the lower border of ala of nose to middle border of tragus (Camper′s plane B was relatively parallel to occlusal plane.

  18. Twin Force矫治器治疗骨性Ⅲ类错(牙合)的头影测量研究%Cephalometric Analysis of Twin Force Appliance in Treatment of Skeletal classMalocclusion

    Institute of Scientific and Technical Information of China (English)

    张月兰; 袁建桥; 闫利辉; 刘林嶓

    2012-01-01

    Objective: To evaluate the clinical effect of the apply of Twin Force Appliance in the early permanent dentition with mild skeletal Class III malocclusion by cephalometric analysis. Method: Apply the trans Twin Force appliance to treat 12 cases of mild skeletal Class III malocclusion of early permanent dentition, and compare the results of X-ray cephalometry before and after treatment. Results.- After an average period of 8. 2 months, the pa-tienfs facial profile is improved obviously: the crossbite of the front teeth is corrected, the molar relationship is Class 1, the both SNA and ANB increase 3°, and Ptm- A increases 5mm, while the SNB and NPog-FH don't change significantly. Conclusion: The trans Twin Force Appliance can promote the development of maxillary, and correct the deformity rapidly and effectively of mild skeletal Class III Malocclusion in early permanent dentition. And it is less dependent on the patients'cooperation. Moreover, patients feel comfortable and easy to accept when wearing the Twin Force Appliance.%目的:将Twin Force矫治器用于矫治恒牙早期轻度骨性安氏Ⅲ类错(牙合)的矫洽,并用X线头影测量评价其临床应用效果.方法:应用反式Twin Force矫治器治疗12例恒牙早期轻度骨性安氏Ⅲ类错(牙合),比较治疗前后的X线头影测量结果.结果:经平均8.2个月的治疗,患者的面部轮廓明显改善,前牙的反(牙合)得以矫治,磨牙关系为Ⅰ类,SNA和ANB均增加30,Ptm-A增加2.05 mm,而SNB和NPog- FH没有明显变化.结论:反式Twin Force矫治器能够促进上颌发育,迅速有效矫治恒牙早期轻度骨性安氏Ⅲ类错(牙合)畸形,且患者戴用舒适,易于配合,对患者配合的依赖性较小.

  19. Complex networks for data-driven medicine: the case of Class III dentoskeletal disharmony

    Science.gov (United States)

    Scala, A.; Auconi, P.; Scazzocchio, M.; Caldarelli, G.; McNamara, JA; Franchi, L.

    2014-11-01

    In the last decade, the availability of innovative algorithms derived from complexity theory has inspired the development of highly detailed models in various fields, including physics, biology, ecology, economy, and medicine. Due to the availability of novel and ever more sophisticated diagnostic procedures, all biomedical disciplines face the problem of using the increasing amount of information concerning each patient to improve diagnosis and prevention. In particular, in the discipline of orthodontics the current diagnostic approach based on clinical and radiographic data is problematic due to the complexity of craniofacial features and to the numerous interacting co-dependent skeletal and dentoalveolar components. In this study, we demonstrate the capability of computational methods such as network analysis and module detection to extract organizing principles in 70 patients with excessive mandibular skeletal protrusion with underbite, a condition known in orthodontics as Class III malocclusion. Our results could possibly constitute a template framework for organising the increasing amount of medical data available for patients’ diagnosis.

  20. Condylar volume and condylar area in class I, class II and class III young adult subjects

    OpenAIRE

    Saccucci Matteo; D’Attilio Michele; Rodolfino Daria; Festa Felice; Polimeni Antonella; Tecco Simona

    2012-01-01

    Abstract Aim Aim of this study was to compare the volume and the shape of mandibular condyles in a Caucasian young adult population, with different skeletal pattern. Material and methods 200 Caucasian patients (15–30 years old, 95 male and 105 females) were classified in three groups on the base of ANB angle: skeletal class I (65 patients), skeletal class II (70 patients) and skeletal class III (65 patients). Left and right TMJs of each subject were evaluated independently with CBCT (Iluma). ...

  1. Extraction treatment of a class II division 2 malocclusion with mandibular posterior discrepancy and changes in stomatognathic function.

    Science.gov (United States)

    Nagayama, Kunihiro; Tomonari, Hiroshi; Kitashima, Fumiaki; Miyawaki, Shouichi

    2015-03-01

    This case report describes the successful extraction treatment of a Class II division 2 malocclusion with mandibular posterior discrepancy and a congenitally missing maxillary lateral incisor on the left side. The posterior space in the mandibular arch was small, and the mandibular second molars were impacted, with distal tipping. The discrepancies in the maxillary and mandibular arches were resolved by extraction of the maxillary lateral incisor on the right side and the mandibular second premolars on both sides. The mesial movement of the mandibular first molars occurred appropriately, with the second molars moving into an upright position. A lip bumper was used with a preadjusted edgewise appliance in the maxillary dentition to reinforce molar anchorage and labial movement of the retroclined incisors. Despite the extraction treatment, a deep bite could be corrected without aggravation as a result of the lip bumper and utility arch in the mandibular dentition. Thus, an Angle Class I molar relationship and an ideal overbite were achieved. The occlusal contact area and masticatory muscle activities during maximum clenching increased after treatment. The maximum closing velocity and the maximum gape during chewing increased, and the chewing pattern changed from the chopping to grinding type. The findings in the present case suggest that the correction of a deep bite might be effective for improving stomatognathic function.

  2. A extração de segundos molares superiores para o tratamento da Classe II Extraction of upper second molars for treatment of Angle Class II malocclusion

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    Maurício Barbieri Mezomo

    2010-06-01

    Full Text Available Este trabalho tem por objetivo apresentar uma abordagem alternativa para o tratamento ortodôntico das más oclusões de Classe II. Através de uma revisão da literatura, verificou-se que a extração de segundos molares superiores demonstrou ser uma alternativa viável para o tratamento desse tipo de má oclusão. Essa opção terapêutica possibilita maior rapidez na distalização dos primeiros molares com menor necessidade de cooperação por parte do paciente. Porém, a análise do grau de formação, posição intraóssea e morfologia do terceiro molar deve ser cuidadosamente realizada para proporcionar o correto posicionamento do mesmo no lugar do segundo molar extraído. Dois casos clínicos apresentarão a sequência do diagnóstico e tratamento com essa mecânica, exibindo resultados adequados dos pontos de vista funcional e estético.The purpose of this article is to present an alternative approach to the orthodontic treatment of Angle Class II malocclusion. According to a literature review it was observed that the extraction of upper second molars has proven to be a viable alternative for the treatment of this type of malocclusion. This therapeutic option enables faster first molar retraction and requires less patient compliance. However, the level of development, intraosseous position and morphology of the third molar should be carefully evaluated to ensure its correct positioning in place of the extracted second molar. Two clinical case reports will demonstrate that the sequence of diagnosis and treatment used with this mechanics yields satisfactory functional and aesthetic results.

  3. Dentofacial effects of bone-anchored maxillary protraction: A controlled study of consecutively treated Class III patients

    Science.gov (United States)

    De Clerck, Hugo; Cevidanes, Lucia; Baccetti, Tiziano

    2011-01-01

    Introduction In this cephalometric investigation, we analyzed the treatment effects of bone-anchored maxillary protraction (BAMP) with miniplates in the maxilla and mandible connected by Class III elastics in patients with Class III malocclusion. Methods The treated sample consisted of 21 Class III patients consecutively treated with the BAMP protocol before the pubertal growth spurt (mean age, 11.10 ± 1.8 years) and reevaluated after BAMP therapy, about 1 year later. The treated group was compared with a matched control group of 18 untreated Class III subjects. Significant differences between the treated and control groups were assessed with independent-sample t tests (P<0.05). Results Sagittal measurements of the maxilla showed highly significant improvements during active treatment (about 4 mm more than the untreated controls), with significant protraction effects at orbitale and pterygomaxillare. Significant improvements of overjet and molar relationship were recorded, as well as in the mandibular skeletal measures at Point B and pogonion. Vertical skeletal changes and modifications in incisor inclination were negligible, except for a significant proclination of the mandibular incisors in the treated group. Significant soft-tissue changes reflected the underlying skeletal modifications. Conclusions Compared with growth of the untreated Class III subjects, the BAMP protocol induced an average increment on skeletal and soft-tissue advancement of maxillary structures of about 4 mm, and favorable mandibular changes exceeded 2 mm. PMID:21055597

  4. An American Board of Orthodontics case report: treatment of a Class I malocclusion with a significant transverse discrepancy and high mandibular plane angle.

    Science.gov (United States)

    Dhane, J M

    1997-03-01

    A case report of the orthodontic treatment of a female adolescent with a Class I malocclusion, complicated by a significant transverse discrepancy and a high mandibular plane angle, is presented. Early removal of a maxillary right first premolar contributed to a midline discrepancy. Treatment consisted of rapid palatal expansion and extraction of the maxillary left first premolar and the mandibular right and left second premolars. A very acceptable result was achieved despite a demonstrated vertical growth pattern.

  5. Radiologically determined orthodontically induced external apical root resorption in incisors after non-surgical orthodontic treatment of class II division 1 malocclusion: a systematic review.

    Science.gov (United States)

    Tieu, Long D; Saltaji, Humam; Normando, David; Flores-Mir, Carlos

    2014-07-23

    This study aims to critically evaluate orthodontically induced external apical root resorption (OIEARR) in incisors of patients undergoing non-surgical orthodontic treatment of class II division 1 malocclusion by a systematic review of the published data. An electronic search of two databases was performed; the bibliographies of relevant articles were also reviewed. Studies were included if they examined the amount of OIEARR in incisors produced during non-surgical orthodontic treatment of individuals with class II division I malocclusion in the permanent dentition. Individuals had no previous history of OIEARR, syndromes, pathologies, or general diseases. Study selections, risk of bias assessment, and data extraction were performed in duplicate. Eight studies of moderate methodological quality were finally included. An increased prevalence (65.6% to 98.1%) and mild to moderate severity of OIEARR (resorption was found. For the maxillary incisors, there was no evidence that either the central or lateral incisor was more susceptible to OIEARR. A weak to moderate positive correlation between treatment duration and root resorption, and anteroposterior apical displacement and root resorption was found. Current limited evidence suggests that non-surgical comprehensive orthodontic treatment to correct class II division 1 malocclusions causes increased prevalence and severity of OIEARR the more the incisor roots are displaced and the longer this movement takes.

  6. Influence of pre-orthodontic trainer treatment on the perioral and masticatory muscles in patients with Class II division 1 malocclusion.

    Science.gov (United States)

    Uysal, Tancan; Yagci, Ahmet; Kara, Sadik; Okkesim, Sukru

    2012-02-01

    The aim of this follow-up study was to evaluate the effects of Pre-Orthodontic Trainer (POT) appliance on the anterior temporal, mental, orbicularis oris, and masseter muscles through electromyography (EMG) evaluations in subjects with Class II division 1 malocclusion and incompetent lips. Twenty patients (mean age: 9.8 ± 2.2 years) with a Class II division 1 malocclusion were treated with POT (Myofunctional Research Co., Queensland, Australia). A group of 15 subjects (mean age: 9.2 ± 0.9 years) with untreated Class II division 1 malocclusions was used as a control. EMG recordings of treatment group were taken at the beginning and at the end of the POT therapy (mean treatment period: 7.43 ± 1.06 months). Follow-up records of the control group were taken after 8 months of the first records. Recordings were taken during different oral functions: clenching, sucking, and swallowing. Statistical analyses were undertaken with Wilcoxon and Mann-Whitney U-tests. During the POT treatment, activity of anterior temporal, mental, and masseter muscles was decreased and orbicularis oris activity was increased during clenching and these differences were found statistically significant when compared to control. Orbicularis oris activity during sucking was increased in the treatment group (P muscle at clenching and orbicularis oris (P muscle at swallowing during observation period. Present findings indicated that treatment with POT appliance showed a positive influence on the masticatory and perioral musculature.

  7. Signs of temporomandibular disorders in girls receiving orthodontic treatment. A prospective and longitudinal comparison with untreated Class II malocclusions and normal occlusion subjects.

    Science.gov (United States)

    Henrikson, T; Nilner, M; Kurol, J

    2000-06-01

    The aim of this investigation was to prospectively and longitudinally study signs of temporomandibular disorders (TMD) and occlusal changes in girls with Class II malocclusion receiving orthodontic treatment and to compare them with subjects with untreated Class II malocclusions and with normal occlusion subjects. Three groups of age-matched adolescent girls were examined for clinical signs of TMD and re-examined 2 years later. Sixty-five Class II subjects received orthodontic fixed straight-wire appliance treatment (Orthodontic group), 58 subjects were orthodontically untreated (Class II group), and 60 subjects had a normal occlusion (Normal group). In the Orthodontic group, the prevalence of muscular signs of TMD was significantly less common post-treatment. The Class II and the Normal groups showed minor changes during the 2-year period. Temporomandibular joint clicking increased in all three groups over the 2 years, but was less common in the Normal group. The Normal group also had a lower overall prevalence of signs of TMD than the Orthodontic and the Class II groups at both registrations. Functional occlusal interferences decreased in the Orthodontic group, but remained the same in the other groups over the 2 years. In conclusion, orthodontic treatment did not increase the risk for or worsen pretreatment signs of TMD. On the contrary, subjects with Class II malocclusions and signs of TMD of muscular origin seemed to benefit functionally from orthodontic treatment in a 2-year perspective. The Normal group had a lower prevalence of signs of TMD than the Orthodontic and the untreated Class II groups.

  8. The relationship of postural body stability and severity of malocclusion

    Directory of Open Access Journals (Sweden)

    Prasanna Arumugam

    2016-01-01

    Full Text Available Objective: To evaluate the relationship between postural body stability (static and dynamic and malocclusions of varying severity and to find whether different skeletal patterns showed variation in postural body stability. Materials and Methods: Seventy-five subjects were divided into three groups based on case complexity using ABO discrepancy index. Group A consisted of 25 subjects restricted to Class I skeletal base and an ABO score ≤10; Group B consisted of 25 subjects with either Class II or III skeletal base and an ABO score of 11-25; Group C consisted of 25 subjects with either Class II or III skeletal base and an ABO score >25. Postural body stability in both static and dynamic equilibrium was recorded using a computerized dynamic posturography. The average values were obtained for the scores obtained in each group and the data obtained wes subjected to statistical analysis using one-way analysis of variance and post hoc Tukey′s test. A P ≤ 0.05 was considered significant. Results: In both static and dynamic conditions, postural body stability was inversely proportional to the severity of malocclusion. The assessment of the overall body score showed that subjects in Group A and Group B had acceptable postural stability and only subjects with Group C showed statistically significant lack of postural stability. Conclusions: Our study showed that patients with malocclusion showed decreased stability and increased sway with increasing severity of malocclusion.

  9. A long-term evaluation of treated Class II division 2 malocclusions: a retrospective study model analysis.

    Science.gov (United States)

    Canut, J A; Arias, S

    1999-08-01

    Pre-treatment, end of treatment, and post-retention study models of 30 subjects with a Class II division 2 malocclusion were assessed, after a period of at least 3 years, in order to evaluate the long-term changes in occlusion, alignment, and arch dimensions. Molar relationship correction was found to be stable after retention. There were no variables which could be used to establish a prognosis of vertical stability. Over-correction of overbite was seen to relapse. Ten per cent of the cases showed unacceptable anterior maxillary irregularities after retention. Mandibular arch width and length usually showed a decrease after retention. An increase in lower intercanine width and arch length achieved by orthodontic treatment always relapsed. This relapse was associated with post-retention mandibular irregularity and crowding. Nine cases (30 per cent) showed an unacceptable degree of mandibular irregularity after retention. Pre-treatment crowding in the mandible showed a relationship with post-retention lower irregularity and crowding. There was a correlation between the number of years which had elapsed after retention, overbite relapse and post-retention mandibular irregularity.

  10. 3-Dimensional cephalomentry analysis of skeletal Classmalocclusion%骨性Ⅲ类错(牙合)的三维CT头影测量分析

    Institute of Scientific and Technical Information of China (English)

    吴斐; 张苗苗

    2011-01-01

    Objective To investigate the 3 -dimensional (3D) changes in the hard tissues of skeletal class III malocclusion (Clll) patients with facial asymmetry by orthognathic surgery. Methods Five female adult OlII patients treated with orthognathic surgery (Bilateral Sagittal Split Ramus Osteotomy+Maxillary Osteotomy Leforti +Genioplasty) who had 3D computerized tomography taken 1 month before (To) and 6 months after (1,) MSS.Reconstruct three -dimensional models in CT post-processing workstation.The landmarks and variables were measured to complete 3-dimensional cephalomentry analysis. Results Mandibular prognathism of all the patients was significantly corrected. Facial asymmetry and lean of the occlusion plane was significantly corrected too (Pg-dev, Gc-Gc',Go-Na-Go') .There were significant changes in hard tissue related in the.anteroposterior (SNA.ANB) .vertical (Ans-Me,MP/SN) and horizontal (Gc-Gc',Go-Na-Go') direction. Conclusion ?There were significant changes in the hard tissues of skeletal class III malocclusion (Clll) patients with facial asymmetry by orthognathic surgery. ? The three -dimensional cephalomentry analysis indicated a more comprehensive characteristic of Craniofacial.compared with traditional cephalomentry analysis.%目的:观察骨性安氏Ⅲ类偏(牙合)的成人女性患者接受正颌手术后硬组织的三维改变.方法:5例接受外科手术(上颌Lefortl型截骨术+双侧下颌升支矢状劈开切骨术+颏部成形术)的成人女性骨性安氏Ⅲ类患者,分别在术前1个月(T0)和术后6个月(T1)接受3DCT扫描.在CT后处理工作站中实现三维模型重建,并进行标记点的确定和变量的测量以完成三维头影测量分析.结果:所有患者的下颌前突均得到显著纠正.不仅偏颌得到改善(Pg-dev),而且(牙合)平面的偏斜也得到矫正(0re/0P).硬组织的改变在前后向(SNA,ANB)、垂直向(Ans-Me,师/SN)和水平向(Gc-Gc',Go-Na-Go')方面均有显著改变.结论:

  11. Camouflage of a high-angle skeletal Class II open-bite malocclusion in an adult after mini-implant failure during treatment.

    Science.gov (United States)

    Franzotti Sant'Anna, Eduardo; Carneiro da Cunha, Amanda; Paludo Brunetto, Daniel; Franzotti Sant'Anna, Claudia

    2017-03-01

    The treatment of skeletal anterior open-bite malocclusion requires complex orthodontic planning that considers its multifactorial etiology, treatment limitations, and high relapse rates. This case report illustrates a successful treatment approach for a skeletal high-angle Class II malocclusion in an adult with a severe open bite. The treatment consisted of a high-pull headgear therapy after mini-implants failure during fixed orthodontic therapy. Adequate esthetics and function were achieved. Despite its low probability, the unexpected event of mini-implant loosening during complex treatments should be considered. Therefore, classic orthodontic mechanics should be established, especially when treating patients for whom invasive procedures such as miniplates or orthognathic surgery are not available options.

  12. Prevalence of Malocclusion among 10-12-year-old Schoolchildren in Kozhikode District, Kerala: An Epidemiological Study

    Science.gov (United States)

    Jeseem, MT; Kumar, TV Anupam

    2016-01-01

    ABSTRACT Background: A malocclusion is an irregularity of the teeth or a malrelationship of the dental arches beyond the range of what is accepted as normal. Objectives: To determine the prevalence of malocclusion in children aged 10-12 years in Kozhikode district of Kerala, South India. Materials and methods: A descriptive cross-sectional study was conducted among schoolchildren aged 10-12 years in six schools in Kozhikode district of Kerala, South India. A total of 2,366 children satisfied the inclusion criteria. Occlusal characteristics like crossbite, open bite, deep bite, protrusion of teeth, midline deviations, midline diastema and tooth rotation were recorded. The data were tabulated and analyzed using Chi-square test. Results: The results revealed that the overall prevalence of malocclusion was 83.3%. Of this, 69.8% of the children had Angle’s class I malocclusion, 9.3% had class II malocclusion (division 1 = 8.85%, division 2 = 0.5%) and 4.1% had class III malocclusion; 23.2% showed an increased overjet (>3 mm), 0.4% reverse overjet, 35.6% increased overbite (>3 mm), 0.29% open bite, 7.2% crossbite with 4.6% crossbite of complete anterior teeth, 63.3% deviation of midline, 0.76% midline diastema and 3.25% rotated tooth. No significant differences in gender distributions of malocclusions were noted except for increased overjet and overbite. Conclusion: There is high prevalence of malocclusion among schoolchildren in Kozhikode district of Kerala. Early interception and early correction of these malocclusions will eliminate the potential irregularities and malpositions in the developing dentofacial complex. How to cite this article: Narayanan RK, Jeseem MT, Kumar TVA. Prevalence of Malocclusion among 10-12-year-old Schoolchildren in Kozhikode District, Kerala: An Epidemiological Study. Int J Clin Pediatr Dent 2016;9(1):50-55. PMID:27274156

  13. Condylar volume and condylar area in class I, class II and class III young adult subjects

    Directory of Open Access Journals (Sweden)

    Saccucci Matteo

    2012-12-01

    Full Text Available Abstract Aim Aim of this study was to compare the volume and the shape of mandibular condyles in a Caucasian young adult population, with different skeletal pattern. Material and methods 200 Caucasian patients (15–30 years old, 95 male and 105 females were classified in three groups on the base of ANB angle: skeletal class I (65 patients, skeletal class II (70 patients and skeletal class III (65 patients. Left and right TMJs of each subject were evaluated independently with CBCT (Iluma. TMJ evaluation included: condylar volume; condylar area; morphological index (MI. Condylar volumes were calculated by using the Mimics software. The condylar volume, the area and the morphological index (MI were compared among the three groups, by using non-parametric tests. Results The Kruskal-Wallis test and the Mann Whitney test revealed that: no significant difference was observed in the whole sample between the right and the left condylar volume; subjects in skeletal class III showed a significantly higher condylar volume, respect to class I and class II subjects (p 3 in males and 663.5 ± 81.3 mm3 in females; p 2 in males and 389.76 ± 61.15 mm2 in females; p  Conclusion Skeletal class appeared to be associated to the mandibular condylar volume and to the mandibular condylar area in the Caucasian orthodontic population.

  14. Palatal dimension correlation in malocclusions for mixed Indian population

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    Ashish Bhalla

    2014-01-01

    Full Text Available Aims: To determine and compare the palatal dimensions in mixed Indian population with different malocclusions and to find correlation among them. Materials and Methods: The sample consisted of 152 study models of children aged 13-16 years consisting of 76 males and 76 females obtained from Govt. teaching institution divided into Angle′s Class I (40, Class II (80 and Class III (32 based on molar relationship and cephalometric evaluation. Ten palatal parameters were measured using Korkhaus gauge, which included arch width at the canine, 1 st premolar, 2 nd premolar and 1 st molar, arch length, palatal depth at canine, 1 st premolar, 2 nd premolar, and 1 st molar and arch perimeter. The mean and standard deviation were calculated, analysis of variance (ANOVA, independent student t test and Pearson′s correlation coefficient were used for the statistical analysis. Results: Angle′s Class I occlusion group showed widest intercanine width. Palatal depth was shallowest in Class II Div 2 malocclusion and Class III malocclusion group showed shortest arch length and arch perimeter. There was no difference in palatal dimensions in between gender. Various palatal parameters were co related to each other. Conclusions: Significant differences existed in most of palatal dimensions among different types of Angle′s occlusal relationships but no significant changes were observed among two genders. Many palatal dimension parameters were correlated to each other.

  15. 骨性Ⅲ类错下颌前部牙槽骨形态的CT分析%The analysis of alveolar bone condition around mandibular incisors in adults with skeletal Classmalocclusion by CT

    Institute of Scientific and Technical Information of China (English)

    杨桦; 贾莹; 王永

    2015-01-01

    Objective To study the mandibular anterior alveolar morphological characteristics of skeletal ClassⅢmalocclusion patients by CT quantitative research , which can provide guidances and indications for clinical skeletal Classmalocclusion treatment and prevent iatrogenic complications , such as rootabsorption. Method 25 skeletal Classmalocclusion patients during thepostpubertal were selected , three-dimensionalspiralCTscanning was applied to measure cortical and cancellousbonethickness around 6 mandibular incisors for analyzing the relationship between the bone mass and its anatomyaround the mandibular incisors roots. Results (1) The bone thickness around the lower anterior homonym teeth was basically symmetric in the skeletal Class III malocclusion. The labial thickness is a little less than the lingual side , gradually thickening along the root apical direction; (2) The area of mandibular incisors was inhomogeneous , and the 1/2 regional cancellous bone thickness of mandibular incisors was often lacked. Conclusion (1) The synchronous compensation of the teeth and alveolar bone is the significant feature of the skeletal Classmalocclusion. (2) The responding regions ofthe alveolar bone in the 1/3 labial-cervical and root-tip may be the sensitive areas during the orthodontic treatment.%目的:通过 CT 成像技术定量研究骨性Ⅲ类错患者下颌前部牙槽骨形态结构特征,为深入了解骨性Ⅲ类错畸形的牙特征、进而制定科学的矫治方案提供参考。方法:选取处于青春后期骨性Ⅲ类错患者25例,运用三维螺旋CT扫描,测量下前牙区骨皮质、骨松质的唇舌侧厚度,分析下前牙牙根周围的骨质情况及解剖学关系。结果:骨性Ⅲ类错下前牙区左右同名牙位骨质厚度基本对称,唇侧小于舌侧,顺根尖方向呈逐渐增厚趋势。下前牙区松质骨厚度不均匀,切1/2区域多见缺如。结论:牙与牙槽骨的同步代偿是骨性Ⅲ

  16. 安氏Ⅱ类亚类错畸形的病因及其矫治%Etiology and treatment of Angle class Ⅱ subdivision malocclusion

    Institute of Scientific and Technical Information of China (English)

    任静; 白丁

    2013-01-01

    Angle class Ⅱ subdivision malocclusion is one of the most common malocclusions in orthodontics. It also is one of the most complicated and difficult situations in treatment. We can use many ways to improve the molar relationship. To achieve the best results, we should always choose methods based on patients’ age, severity, compliance, and so on. This paper summarizes the etiology, clinical features and treatment planning of Angle classⅡ subdivision malocclusion.%  安氏Ⅱ类亚类错畸形是临床中较为常见的一种错畸形,是在临床治疗中最为复杂和困难的错类型之一。临床中可以通过多种方法,来协调以使双侧达到良好磨牙关系。正畸医师应根据患者年龄、错的严重程度、合并的错类型、患者配合程度等选择不同的方法,以达到最佳效果。本文就近年来对安氏Ⅱ类亚类错畸形的病因、临床表现及治疗方法等的相关研究作一综述。

  17. A benefit-risk assessment of class III antiarrhythmic agents

    DEFF Research Database (Denmark)

    Brendorp, Bente; Pedersen, Oledyg; Torp-Pedersen, Christian;

    2002-01-01

    again increases the frequency of both supraventricular as well as ventricular arrhythmias. Class III antiarrhythmic drugs act by blocking repolarising currents and thereby prolong the effective refractory period of the myocardium. This is believed to facilitate termination of re-entry tachyarrhythmias....... This class of drugs is developed for treatment of both supraventricular and ventricular arrhythmias. Amiodarone, sotalol, dofetilide, and ibutilide are examples of class III drugs that are currently available. Amiodarone and sotalol have other antiarrhythmic properties in addition to pure class III action......, which differentiates them from the others. However, all have potential serious adverse events. Proarrhythmia, especially torsade de pointes, is a common problem making the benefit-risk ratio of these drugs a key question. Class III drugs have been evaluated in different settings: primary and secondary...

  18. Extraction of maxillary first permanent molars in patients with Class II Division 1 malocclusion.

    NARCIS (Netherlands)

    Stalpers, M.J.; Booij, J.W.; Bronkhorst, E.M.; Kuijpers-Jagtman, A.M.; Katsaros, C.

    2007-01-01

    INTRODUCTION: Our objectives were to assess treatment outcomes in Class II Division 1 patients who were treated orthodontically with extraction of the maxillary first permanent molars and to describe the changes in their facial profiles. METHODS: This was a prospective, longitudinal, 1-group outcome

  19. Prevalence of malocclusion among Iranian children: A systematic review and meta-analysis

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    Maryam Akbari

    2016-01-01

    Full Text Available Background: The high prevalence of malocclusion is a public health problem in the world and the third priority in oral care. Numerous primary studies have presented reports on the prevalence of malocclusion among Iranian children. In combination, the results of these studies using meta-analysis are highly valuable for health policy-making. Similarly, this study aimed at determining the prevalence of different types of malocclusion among Iranian children. Materials and Methods: Using relevant keywords, national and international databases were explored. After narrowing down the search strategy and leaving out the duplicates, the remaining articles were screened based on titles and abstracts. To increase search sensitivity, reference lists of the papers were examined. To identify unpublished articles and documentations, a set of negotiations were done with the people involved and research centers. Finally, the heterogeneity index between the studies was determined using Cochran (Q and I2 tests. According to the results of heterogeneity, the random effects model was used to estimate the prevalence of malocclusion in Iran. Results: In total, 25 articles were included in the meta-analysis process. The prevalence of dental malocclusion was estimated in 28,693 Iranian children aged 3-18 years. The total prevalence of Class I, II, and III malocclusion was 54.6% (46.5-62.7, 24.7% (20.8-28.7, and 6.01% (4-7.1, respectively. The prevalence of Class I, II, and III malocclusion was 44.6% (32.9-56.2, 21.5% (18.01-25.1, and 4.5% (3.2-5.9 in boys and 48.8% (36.8-60.8, 21.5% (16.9-25.1, and 5.5% (3.9-7.1 in girls, respectively. Conclusion: This study showed a high prevalence of malocclusion among Iranian children. Also, the results indicated that the prevalence is higher in girls.

  20. The clinic review to correct the classmalocclusion by class Ⅱ elastic%关于安氏Ⅱ类使用Ⅱ类牵引效果的临床评价

    Institute of Scientific and Technical Information of China (English)

    陈桂玲; 孙德文; 余兴华

    2013-01-01

    Objective The purposes of this clinic review was to evaluate the true effects of Class Ⅱ elastics in Classmalocclusion treatment.Methods CENTRAL,MEDLINE,EMBASE,PUBMED and CNKI were searched to identify all relevant papers published between 1980 and March 2013.Study eligibility criteria were the application of Class Ⅱ elastics in Classmalocclusion treatment and the presentation of dental or skeletal outcomes of treatment.All age groups were included.Results Nine studies met our inclusion criteria of the 437 articles identified by the search.Four studied the isolated effects of lass Ⅱ elastics,and 5 were comparisons between a single use of elastics and another method for Classmalocclusion correction.Because of the differences in treatment modalities in these articles,a meta-analysis was not possible.Conclusion Class Ⅱ elastics are effective in correcting Classmalocclusions,and their effects are primarily dentoalveolar.Therefore,they are similar to the effects of fixed functional appliances in the long term.Little attention has been given to the effects of Class Ⅱ elastics on the soft tissues in Classmalocclusion treatment.%目的:临床评价安氏Ⅱ类患者使用橡皮筋进行Ⅱ类牵引的真实效应.方法:检索CENTRAL、MEDLINE、EMBASE、PUBMED和CNKI共5个数据库.纳入包含了在安氏Ⅱ类患者中使用Ⅱ类牵引并评估了牙性和骨性改变的研究.因为方法学的异质性而放弃Meta分析,只做定性评价.结果:检索到437篇文献,其中9篇符合笔者的纳入标准.4篇单独研究了Ⅱ类牵引的效果,另有5篇比较了使用Ⅱ类牵引和使用其他方法进行安氏Ⅱ类病例矫治的效果.结论:Ⅱ类牵引能有效改善安氏Ⅱ类错(牙合),效应主要是牙性的.从长远角度上看与固定功能矫治器的效应相似,对软组织改变的影响仍需进一步研究.

  1. Surgical correction of class II skeletal malocclusion in an adult patient

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    Ramakrishnan Balachander

    2014-01-01

    Full Text Available Correction of skeletal deformities in adult patients with orthodontics is limited. Orthognathic surgery is the best option for cases when camouflage treatment is questionable and growth modulation is not possible. This case report illustrates the benefit of the team approach in correcting vertical maxillary excess along with class II skeletal deformity. A cosmetic correction was achieved by superior repositioning of maxilla with LeFort I osteotomy and augmentation genioplasty, along with orthodontic treatment. The patient′s facial appearance was markedly improved along with functional and stable occlusion

  2. A study on the prevalence of the idiopathic osteosclerosis in Korean malocclusion patients

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Seung Youp; Park, In Woo; Jang, In San; Choi, Dong Soon; Cha, Bong Kuen [College of Dentisity, Gangneung Wonju National University, Gangneung (Korea, Republic of)

    2010-12-15

    This retrospective study was performed to investigate the prevalence of the idiopathic osteosclerosis (IO) in Korean malocclusion patients according to age, sex, and the Angle's classification of malocclusion. This study consisted of 2,001 randomly selected patients from the Department of Orthodontics at the Gangneung-Wonju National University Dental Hospital, Korea. The prevalence of IO in Korean malocclusion patients was recorded using their panoramic radiographs, and the following parameters were surveyed; age, sex, and the Angle's classification of malocclusion. The chi-square test was analyzed to determine the statistical significance of differences in the prevalence of IO between age, sex, and the Angle's classification of malocclusion. The prevalence of IO in the jaws was 6.7% in a total of 2,001 examined orthodontic patients. The majority of IO was found in the mandible (96.58%). The 30-39 age group showed the highest prevalence of IO (9.60%). There was a higher prevalence in females (6.89%) than in males (6.45%). The prevalence of IO in Angle Class I group (7.07%) was the most frequent, followed by Angle Class II group (6.72%), and Angle Class III group (6.40%). However, there was no statistical significance in sex and Angle's classification of malocclusion. The prevalence of IO in malocclusion patients showed the differences between various age groups and most of them were found in the mandibular posterior area. However, sex and the type of malocclusion are not to be considered as a contributing factor of IO.

  3. A benefit-risk assessment of class III antiarrhythmic agents

    DEFF Research Database (Denmark)

    Elming, Hanne; Brendorp, Bente; Pehrson, Steen;

    2004-01-01

    relief. Since many patients experience a decrease in physical performance as well as a diminished quality of life during arrhythmia there is still a need for antiarrhythmic drug therapy. The development of new antiarrhythmic agents has changed the focus from class I to class III agents since it became...... evident that with class I drug therapy the prevalence of mortality is considerably higher. This review focuses on the benefits and risks of known and newer class III antiarrhythmic agents. The benefits discussed include the ability to maintain sinus rhythm in persistent atrial fibrillation patients......, and reducing the need for implantable cardioverter defibrillator shock/antitachycardia therapy, since no class III antiarrhythmic agents have proven survival benefit. The risks discussed mainly focus on pro-arrhythmia as torsade de pointes ventricular tachycardia....

  4. Radiographic cephalometric study using Ricketts analysis for dentoskeletal patterns evaluation of patients having class II, division I malocclusion treated during mixed dentition period; Estudo cefalometrico radiografico empregando a analise de Ricketts na avaliacao dos padroes dento-faciais de pacientes portadores de maloclusao de classe II, divisao I, tratados durante a fase de denticao mista

    Energy Technology Data Exchange (ETDEWEB)

    Motta e Albuquerque, Carmen da

    1988-12-31

    In the specialized literature about the use of extra oral forces in the treatment of the Class II malocclusion one can observe that it has been used more and more, with the objective of achieving teeth improvement and bone as well. It is proposed to evaluate the extent of the orthodontic/orthopedic modifications and their influence in the facial pattern of patients with those malocclusions, treated during the mixed dentition period. A sample of 32 patients of both sexes, leucoderms, with Class II, division I malocclusion, between 7 and 14 years old, were studied employing a cephalometric radiographic method for evaluation. (author). 94 refs., 11 figs., 15 tabs.

  5. Arch width changes in patients with Class II division 1 malocclusion treated with maxillary first premolar extraction and non-extraction method

    Science.gov (United States)

    Shirazi, Sajjad; Kachoei, Mojgan; Shahvaghar-Asl, Naiemeh; Shirazi, Samaneh

    2016-01-01

    Background The aim of this study was to determine arch width changes during maxillary first premolars extraction and non-extraction treatment in patients with Class II division 1 malocclusion. Material and Methods Dental casts of 91 Class II division 1 patients (36 males and 55 females) were evaluated. The minimum age of the subjects at the beginning of treatment was above 16 years. 48 patients were treated with extraction of the maxillary first premolars and 43 patients were treated without extraction. Pre- and post-treatment maxillary and mandibular inter-canine and inter-molar arch widths were measured. Results At the end of treatment, maxillary and mandibular inter-canine widths of both groups increased significantly. The maxillary inter-molar width decreased in the extraction group and increased in the non-extraction group. The mandibular inter-molar width increased significantly in both groups. No significant differences were observed between males and females. Conclusions The results of this study indicated that there was a tendency for an increase in arch width during both the extraction and non-extraction treatment except maxillary inter-molar width in the extraction cases. Key words:Dental arch, malocclusion, angle Class II, tooth movement, extraction. PMID:27703608

  6. Klammt open elastic activator and twin blocks in Class II malocclusion treatment.

    Directory of Open Access Journals (Sweden)

    Eduardo Maikel Curbeira Hernández

    2009-04-01

    Full Text Available Background: Klammt open elastic activator and twin blocks have been two of the most worldwide studied functional appliances; however, there are different opinions about their effect on the cranium-facial complex. Objective: To determine the efficacy of these appliances in the functional treatment in Class II division I syndrome in early mixed teething. Methods: Prospective, cuasi experimental, “before-after” study without control group, including all children between 6 and 9 years of Area II in Cienfuegos municipality. After applying inclusion criteria, 20 patients were selected through simple randomized sampling and distributed in two groups, one for each technique. Lateral cranium teleradiographies were taken at the beginning and after a year of treatment, and lineal and/or angular measurements of Steiner, Ricketts, McNamara and Legan Burstone cephalograms were applied. Results: Favourable changes in cranium lateral radiographies measurements were obtained mainly from therapy with twin blocks. There was a decrease in the angle formed by the joint planes nasion-point A and nasion-point B and facial convexity, increase in mandible length and inferior facial height. Nasolabial angle and labial protuberance didn´t increase significantly. Conclusions: treated patients positively modified their bio-typology, and growth trend showed positive variations during functional therapy.

  7. Prevalence and determinant factors of malocclusion in population with special needs in South India

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    R Muppa

    2013-01-01

    Full Text Available Objectives: Malocclusion plays an important role in the overall oral health of an individual because it is associated with periodontal disease, temporomandibular disorders and may be complicated by an individual′s disparity. Careful attention to malocclusion in children with special needs leads to a considerable improvement in the quality-of-life. The objective of the present study was to analyze the prevalence of malocclusion and its association with determinant factors in individuals with special needs in South India. Materials and Methods: A cross-sectional study was carried out that included 844 individuals with special needs and their mothers at eleven institutions in South India. Data were collected based on the questionnaire given to the mothers and dental examination carried out on the children. The nutritive and non-nutritive oral habits were obtained from the reports of the mothers. Clinical examination recorded the following: Class I, Class II, Class III, anterior crowding, anterior spacing, deep bite, open bite, and anterior cross bite. Statistical analyses of data were performed using Chi-square test. Results: Results at the end of the study revealed anterior crowding in 27.37% of the total sample size, deep bite in 20.5%, Class I in 14.34%, anterior spacing in 12.9%, Class II in 9.95%, Class III in 5.33%, anterior cross bite in 4.98% and open bite in 4.62%. Conclusion: The prevalence of malocclusion in individuals with special needs is associated with the type of disability and it is more in males than females. Mentally disabled individuals had higher frequencies of all types the malocclusion. Prevalence of anterior crowding was higher compared to other types of malocclusion followed by deep bite.

  8. Angulação dos caninos em indivíduos portadores de má oclusão de Classe I e de Classe III: análise comparativa através de um novo método utilizando imagens digitalizadas Canine angulation in Class I and Class III individuals: a comparative analysis with a new method using digital images

    Directory of Open Access Journals (Sweden)

    Lucyana Ramos Azevedo

    2010-10-01

    Full Text Available OBJETIVO: determinar as angulações mesiodistais das coroas dos caninos em indivíduos portadores de má oclusão de Classe III, comparando-os a indivíduos Classe I. MÉTODOS: foram empregadas medidas tomadas em fotografias digitalizadas de modelos de gesso e transportadas para um programa gráfico para leitura das medidas (Image Tool. Tais procedimentos foram repetidos para avaliação do erro do método casual (fórmula de Dahlberg e para a análise da reprodutibilidade através da Correlação intraclasse. A amostra constituiu-se de 57 pacientes com dentição permanente completa e não tratados ortodonticamente, dividida em dois grupos, de acordo com a má oclusão apresentada: o grupo I foi constituído por 33 pacientes portadores de má oclusão de Classe I, sendo 16 do sexo masculino e 17 do feminino, com média de idades de 27 anos; o grupo II era representado por 24 pacientes portadores de má oclusão de Classe III, 20 do sexo masculino e 4 do feminino, com média de idades de 22 anos. RESULTADOS: o erro casual mostrou-se com uma variação de 1,54 a 1,96 graus para a angulação dos caninos. A análise estatística revelou que o método apresenta uma excelente reprodutibilidade (pOBJECTIVES: This study aimed to determine the mesiodistal angulation of canine crowns in individuals with Class III malocclusion in comparison with Class I individuals. METHODS: Measurements were taken from digital photographs of plaster models and imported into an imaging program (Image Tool. These procedures were repeated to assess random method error (Dahlberg's formula, and analyze reproducibility by intraclass correlation. The sample consisted of 57 patients with complete permanent dentition, untreated orthodontically and divided into two groups according to their malocclusion: Group I consisted of 33 patients with Class I malocclusion, 16 males and 17 females, mean age 27 years; Group II comprised 24 patients with Class III malocclusion, 20 males and

  9. 改良颊侧多曲簧矫治器纠正早期安氏Ⅲ类错(牙合)胖下颌偏斜%Early the classmalocclusion with mandible deviation corrected by the improved Buccal Multiloop removable appliance

    Institute of Scientific and Technical Information of China (English)

    王阿娜; 侯录; 赵兴; 印明晶; 梁雪

    2012-01-01

    目的:通过头颅定位后前位片测量,探讨改良颊侧多曲簧活动矫治器纠正早期安氏Ⅲ类错(牙合)且伴下颌功能性偏斜,改善早期功能性下颌偏斜.方法:混合牙列早期安氏Ⅲ类错(牙合)且伴有下颌功能性偏斜患者20例,采用改良颊侧多曲簧活动矫治器的方法,矫治前后头颅定位后前位片P-A测量分析,用统计软件处理数据.结果:改良颊侧多曲簧活动矫治器矫正早期安氏Ⅲ类错(牙合)且伴有下颌功能性偏斜后,下颌骨两侧结构不对称性有明显改善,下颌骨两侧综合长度差亦减小(P<0.01),两侧下颌体长度差明显减小(P<0.01).结论:由于早期安氏Ⅲ类错(牙合)且伴有单侧后牙反(牙合),导致的功能性下颌偏斜,采用改良颊侧多曲簧活动矫治器,可以使下颌骨的不对称得到一定的改善,是早期纠正下颌功能性偏斜的有效手段.%Objective To confirm that correction of the class III malocclusion with mandible deviation through the improved Buccal Multiloop removable appliance is associated with a change in early functional mandible deviation was the purpose of this Study. Methods 20 the class III malocclusion of mixed dentitions with mandible deviation were treated by improved Buccal Multiloop removable appliance for correction of anterior crossbite and unilateral posterior crossbite.Pretreatment and posttreatment tomograms were available for 20 of the patients.AII data was analysed by SPSS statistical software. Results After the correction of the class III malocclusion of mixed dentitions with mandible deviation by improved Buccal Multiloop removable appliance.craniofacial asymmetry improved significantly. Conclusion According to this study.early treatment of the class III malocclusion with mandible deviation were treated by improved Buccal Multiloop removable appliance is indicated to improve early functional mandible deviation.

  10. Radiographic cephalometry assessment of the linear and angular parameters on cranial base in children with skeletal class III

    Directory of Open Access Journals (Sweden)

    Stojanović Zdenka M.

    2007-01-01

    Full Text Available Background/Aim. In malocclusion of skeletal class III, mandible is located in front of maxilla in sagital plain, which is manifested by a lower value of the sagital inter-jaw angle than in skeletal class I, where the jaw sagital relation is normal. Apart from the deformities on mandible and/or maxilla, in skeletal class III deformities are also frequent on the cranial base. The aim of this research was to find the differences in the parameter values on the cranial base among the children with skeletal class III and the children with skeletal class I in the period of mixed dentition. Methods. After clinical examination and orthopan-tomography, profile radiography of the head was analyzed in 60 examinees, aged from 6−12 years. The examinees were divided into two groups: group 1 - the children with skeletal class III; group 2 - the children with skeletal class I. Both linear and angular parameters on the cranial base were measured, as well as the angles of maxillary and mandible prognatism and the angle of sagital inter-jaw relation. The level of difference in the parameter values between the groups was estimated and the degree of correlation of the main angle of the cranial base with the angles of sagital position of the jaws in each of the two groups was established. Results. A significant difference between the groups was found only in the average values of the angles of maxillary prognatism and sagital interjaw relation. In the group 1, the main angle of the cranial base was in a significant correlation with the angles of sagital positions of the jaws, while in the group 2, such significance was not found. Conclusion. There were no significant differences in the parameter values on the cranial base between the groups. There was a significant correlation of the main angle of the cranial base with the angles of sagital position of the jaws in the group 1 only. .

  11. The simple class II and class III corrector: three case reports.

    Science.gov (United States)

    Spary, David John; Little, Rachel Ann

    2015-03-01

    This article illustrates three case reports which describe a very simple appliance that is used to correct both class II and class III buccal segments. A class I molar relationship is achieved within 2-6 months. Hundreds of cases have been treated with these appliances over a number of years at Queen's Hospital, Burton upon Trent with great success.

  12. Má oclusão Classe II de Angle tratada sem extrações e com controle de crescimento Angle Class II malocclusion treated without extractions and with growth control

    Directory of Open Access Journals (Sweden)

    Flávia Artese

    2009-06-01

    Full Text Available A má oclusão Classe II de Angle é caracterizada por uma discrepância dentária anteroposterior, que geralmente está acompanhada por alterações esqueléticas. O tratamento ortodôntico precoce permite a correção da discrepância esquelética por controle de crescimento (primeira fase, o que favorece a correção do posicionamento dentário, mais tardiamente (segunda fase. Este relato descreve o tratamento de um caso de má oclusão Classe II, divisão 2, de Angle, em duas fases, e foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO. O caso foi avaliado como representante da Categoria 1, ou seja, má oclusão Classe II de Angle tratada sem extrações dentárias e com controle de crescimento.Angle Class II malocclusion is characterized by an anteroposterior dental discrepancy which is generally accompanied by skeletal disharmonies. Early orthodontic treatment allows the correction of skeletal discrepancies using growth control (first phase which favors later correction of tooth positioning (second phase. This case report describes an Angle Class II, division 2, malocclusion treated in two phases and was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as part of the requirements for BBO certification. It was evaluated as a Category 1 case, i.e., Class II malocclusion treated without extractions, with growth control.

  13. 3-Dimensional analysis for class III malocclusion patients with facial asymmetry

    OpenAIRE

    2013-01-01

    Objectives The aim of this study is to investigate the correlation between 2-dimensional (2D) cephalometric measurement and 3-dimensional (3D) cone beam computed tomography (CBCT) measurement, and to evaluate the availability of 3D analysis for asymmetry patients. Materials and Methods A total of Twenty-seven patients were evaluated for facial asymmetry by photograph and cephalometric radiograph, and CBCT. The 14 measurements values were evaluated and those for 2D and 3D were compared. The pa...

  14. Alternative treatment for open bite Class III malocclusion in a child with Williams-Beuren syndrome

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    Giovanni Modesto Vieira

    2015-02-01

    Full Text Available Williams-Beuren syndrome (WBS is a rare genetic condition that affects approximately 1 in every 20,000 - 50,000 live births. WBS children have specific skeletal deformities, dental malformations and rare lingual muscle dysfunction. The need for orthodontic and orthognathic therapy has arisen and has been considered a real clinical challenge even for experienced professionals, once it requires a complex and individualized treatment plan. This study reports a case of orthopedic expansion of the maxilla, in which a modified facial mask was used for protraction of the maxillary complex associated with clockwise rotation of the maxilla. In addition, special considerations about treatment time and orthopedic outcomes are discussed.

  15. Management of an Adult with Class III Malocclusion, Gummy Smile, and Spaced Dentition.

    Science.gov (United States)

    Babar, Sameera; Calamia, John R; Sorrel, Jerry M

    2015-07-01

    This case report presents an interdisciplinary approach to achieve functioning occlusion and an aesthetically pleasing smile. This patient's concerns were spacing between upper front teeth and a gummy smile. The case was evaluated, and treatment was planned using a multidisciplinary approach. The patient rejected the option of orthognathic surgery to correct a skeletal problem. Treatment included orthodontics, osteoplasty, gingivoplasty, and porcelain veneer restorations to achieve the desired aesthetic result. Comprehensive orthodontics resulted in a functionally stable occlusion. Space distribution between maxillary anterior teeth with adequate overjet and overbite relationships allowed for conservative preparation to receive porcelain veneer restorations.

  16. 25 CFR 522.10 - Individually owned class II and class III gaming operations other than those operating on...

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 2 2010-04-01 2010-04-01 false Individually owned class II and class III gaming... GAMING COMMISSION, DEPARTMENT OF THE INTERIOR APPROVAL OF CLASS II AND CLASS III ORDINANCES AND RESOLUTIONS SUBMISSION OF GAMING ORDINANCE OR RESOLUTION § 522.10 Individually owned class II and class...

  17. Nebraska School Facilities: Educational Adequacy of Class III School District Structures

    Science.gov (United States)

    Weidner, John M., Sr.

    2009-01-01

    In 2009, a replication of the Pool study was conducted. This study, however, focused on the school systems classified as Class III districts. Nebraska has 252 Class III districts. Compared with Class II (21), Class IV (1), and Class V(1) districts, the Class III districts offer a wide array of school settings, from urban to extremely rural, and…

  18. 安氏Ⅰ、Ⅱ类错(牙合)畸形舌体与舌骨的影像学表现%Study on tongue and hyoid bone position in Class Ⅰ and Classmalocclusion

    Institute of Scientific and Technical Information of China (English)

    庄巧红; 胡心怡; 高文岚; 肖轺穆; 邓梦昭; 潘晓岗

    2012-01-01

    目的:研究安氏Ⅰ类和安氏Ⅱ类错(牙合)畸形舌体、舌骨位置的差异,探讨舌及舌骨位置与错(牙合)畸形矢状向牙和颌骨位置改变的关系.方法:选择未经治疗的安氏Ⅰ类错(牙合)畸形患者15例(平均年龄13.7岁,男7例,女8例);安氏Ⅱ类错(牙合)畸形患者15例(平均年龄14.3岁,男4例,女11例),拍摄头颅定位侧位片,进行头影测量分析.测量舌体位置(U'O、S'O、ET、HET和Ltg1-7),舌骨位置(C3H、H'H、GoGn-H)以及牙、颌骨的矢状向指标.采用SPSS15.0软件包对2组测量值进行成组t检验,并分析两组测量值之间的相关性.结果:安氏Ⅱ类错(牙合)畸形舌体高度大于安氏Ⅰ类,差异有显著性(P<0.05).舌体长度、姿势位及舌骨位置均无显著差异.安氏Ⅰ类错(牙合)组,HET与CoA显著相关(r=0.691,P<0.01),S'O分别与CoA、U1L1显著相关(r=0.689,P<0.01;r=-0.673,P<0.01),C3H与ANB相关(r=-0.519,P<0.05).安氏Ⅱ类错(牙合)组,HET分别与CoA、CoGn显著相关(r=-0.528,P<0.05;r=-0.569,P<0.05),S'O分别与CoA、CoGn、GoGn及GoGnSN显著相关(r=-0.551,P<0.05;r=0.535,P<0.05;r=0.626,P<0.05;r=0.531,P<0.05),GoGnH分别与MP、OP显著相关(r=0.540,P<0.05;r=0.617,P<0.05).结论:安氏Ⅰ类与安氏Ⅱ类错(牙合)畸形患者的舌体高度存在显著差异,舌体高度及舌体垂直位置和上颌长度相关.舌体及舌骨的位置在安氏Ⅰ类错(牙合)畸形和安氏Ⅱ类错(牙合)畸形的矢状向颌骨及牙位置上存在不同的相关关系.%PURPOSE: To compare the differences between the position of the tongue and hyoid bone in Class I and Class II malocclusion, and explore their relation with sagittal denial and skeletal changes in two types of malocclusion. METHODS: Thirty untreated patients with malocclusion (Class I 15,average age 13.7 years; Class II 15, average age 14.3 years)were included in the study. Cephalometric analysis was carried out to measure the tongue and hyoid bone

  19. Cephalometric evaluation of class-III patients with chin cap and tongue guard.

    Science.gov (United States)

    Danaie, S M; Salehi, P

    2005-06-01

    The purpose of this study was to determine the effect of chin cap therapy combined with an upper tongue guard in the early treatment of class-III malocclusion on the nasomaxillary complex and mandible. The subjects of this study consisted of 40 patients aged 5-13 years (mean age of 8.5 +/- 2). All of them possessed an anterior cross bite and/or concave profile. The mean force of chin cap was determined to be 200 g on each side for 18 h/day and the mean treatment period was 22 months. The cephalometric analyses including skeletal, dental, and soft tissue analysis were carried out before and after treatment. The analysis of the cephalometric measurements revealed a negative correlation between the combination effects of chin cap therapy upper tongue guard. This effect appeared in the early stages of treatment. It was a case-control study and Wilcoxon test was used for statistical analysis. The comparison of dependent variables revealed that skeletal effects of chin cap therapy were more than dental and soft tissue effects. Changes in the upper and lower pharyngeal spaces were not significant. A reduction of nasolabial angle occurred due to the protrusion of upper incisors. Finally, it was shown that the combination of chin cap and upper tongue guard could be more effective in the early treatment.

  20. Nonsurgical and nonextraction treatment of skeletal Class III open bite: its long-term stability.

    Science.gov (United States)

    Kondo, E; Aoba, T J

    2000-03-01

    Two female patients, aged 14 years 5 months and 17 years 3 months with skeletal Class III open bite and temporomandibular dysfunction are presented. They had previously been classified as orthognathic surgical cases, involving first premolar removal. The primary treatment objective was to eliminate those skeletal and neuromuscular factors that were dominant in establishing their malocclusions. These included abnormal behavior of the tongue with short labial and lingual frenula, bilateral imbalance of chewing muscles, a partially blocked nasopharyngeal airway causing extrusion of the molars, with rotation of the mandible and narrowing of the maxillary arch. Resultant occlusal interference caused the mandible to shift to one side, which in turn produced the abnormal occlusal plane and curve of Spee. As a result, the form and function of the joints were adversely affected by the structural and functional asymmetry. These cases were treated by expanding the maxillary arch, which brought the maxilla downward and forward. The mandible moved downward and backward, with a slight increase in anterior facial height. Intruding and uprighting the posterior teeth, combined with a maxillary protraction, reconstructed the occlusal plane. A favorable perioral environment was created with widened tongue space in order to produce an adequate airway. Myofunctional therapy after lingual and labial frenectomy was assisted by vigorous gum chewing during and after treatment, together with a tooth positioner. Normal nasal breathing was achieved.

  1. Assessment of the dentoskeletal changes following the use of twin-block functional appliance and inclined anterior bite plan in the patients with class II malocclusion div 1 in 11-14 years old

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    Allahyar Geramy

    2015-12-01

    Full Text Available Background and Aims: Cl II malocclusion is one of the most common abnormalities in human societies and using a simple, affordable and accessible treatment that can be provided by general practitioners or specialists, to prevent future malocclusion complications is vital. Cl II malocclusion treatment using functional appliances such as twin block and anterior inclined bite plan have less cost, side effects and complications compared to fixed orthodontic or orthosurgery. Until now, the dentoskeletal changes resulting from the application of twin block and anterior inclined bite plan in patients with Class II malocclusion has not been evaluated. The objective of the present study was to assess the dentoskeletal changes following the use of twin-block functional appliance and inclined anterior bite plan in the patients with class II malocclusion div 1 during mixed dentition. Materials and Methods: In this retrospective cohort trial, 60 patients with the definitive diagnosis of Class II div. 1 malocclusion having ANB>2 and FMA angel between 20 and 30 and without any previous treatment or syndrome who were treated with twin-block or inclined anterior bite plan appliance were selected and their lateral cephalometries were traced before and after treatment. Selected distance and angular landmarks were measured on the cephalograms with the good reliability (ICC=0.953 and the changes occurred in the landmarks were statistically analyzed using Student t test. Results: Due to the increased mandibular growth, most of the landmarks experienced significant changes following the treatment with twin-block and inclined bite plan (P0.05, however, SNA (P=0.04, overjet (P=0.007 and wits appraisal (P=0.004 changed differently after using the appliances. Conclusion: Despite with most similarities of both twin-block and anterior inclined bite plan to correct class II div. 1 malocclusion, Due to the advantages of anterior inclined bite plan such as less size, good

  2. 25 CFR 522.8 - Publication of class III ordinance and approval.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 2 2010-04-01 2010-04-01 false Publication of class III ordinance and approval. 522.8... AND CLASS III ORDINANCES AND RESOLUTIONS SUBMISSION OF GAMING ORDINANCE OR RESOLUTION § 522.8 Publication of class III ordinance and approval. The Chairman shall publish a class III tribal...

  3. 49 CFR 232.211 - Class III brake tests-trainline continuity inspection.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Class III brake tests-trainline continuity... § 232.211 Class III brake tests-trainline continuity inspection. (a) A Class III brake test shall be... configuration of the train has changed in certain ways. In particular, a Class III brake test shall be...

  4. 25 CFR 291.5 - Where must the proposal requesting Class III gaming procedures be filed?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Where must the proposal requesting Class III gaming... ECONOMIC ENTERPRISES CLASS III GAMING PROCEDURES § 291.5 Where must the proposal requesting Class III gaming procedures be filed? Any proposal requesting Class III gaming procedures must be filed with...

  5. 25 CFR 291.15 - How long do Class III gaming procedures remain in effect?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false How long do Class III gaming procedures remain in effect... ENTERPRISES CLASS III GAMING PROCEDURES § 291.15 How long do Class III gaming procedures remain in effect? Class III gaming procedures remain in effect for the duration specified in the procedures or...

  6. Effect of different vertical craniofacial morphology types in classmalocclusion on teeth movements speeds%垂直面型对安氏Ⅲ类错(牙合)畸形牙齿移动速度的影响

    Institute of Scientific and Technical Information of China (English)

    胡飞; 周磊; 刘从华; 肖珲

    2012-01-01

    Objective To compare the speed of teeth movements among different vertical craniofacial morphology types in class III malocclusion cases. Methods Twenty-four high-angle cases, twenty four average-angle cases and twenty four low-angle cases were involved in this study. Modern standard edgewise orthodontic technique was used to move the canine distally, anchored with the first molar. The speed of teeth movements was compared. Results The differences in speed of teeth movements among different vertical eraniofacial morphology were proved significantly. The speed in high-angle cases was 0.72-1.46 mm per 28 days, the speed in average-angle ones was 0.46-0.98 mm per 28 days and the speed in low-angle ones was 0.21-0.78 mm per 28 days. Conclusion The vertical oraniofacial morphology is a critical factor affecting the speeds of teeth movements in class III malocclusion.%目的 比较3种垂直面型的安氏Ⅲ类错(牙合)畸形牙齿移动速度.方法 随机选取3种垂直面型的安氏Ⅲ类错(牙合)畸形各24例,采用方丝弓矫治技术,以上、下颌的第一磨牙做支抗,远中移动尖牙,对尖牙向远中移动和磨牙向近中移动的速度进行比较.结果 高角型病例牙齿移动速度最快,为每28 d移动0.66~ 1.78 mm;低角型最慢,为每28 d移动0.18~1.12 mm;均角型居中,为每28 d移动0.44~ 1.52 mm.安氏Ⅲ类高角、均角、低角型错(牙合)畸形牙齿移动速度差异有统计学意义(P<0.05).结论 3种垂直面型对安氏Ⅲ类错(牙合)畸形的牙齿移动速度有显著影响.

  7. Cephalometric evaluation of the effects of the Twin Block appliance in subjects with Class II, Division 1 malocclusion amongst different cervical vertebral maturation stages

    Directory of Open Access Journals (Sweden)

    Aisha Khoja

    Full Text Available ABSTRACT Objectives: To evaluate the cephalometric changes in skeletal, dentoalveolar and soft tissue variables induced by Clark's Twin Block (CTB in Class II, Division 1 malocclusion patients and to compare these changes in different cervical vertebral maturation stages. Methods: Pre- and post-treatment/observation lateral cephalograms of 53 Class II, Division 1 malocclusion patients and 60 controls were compared to evaluate skeletal, dentoalveolar and soft tissue changes. Skeletal maturity was assessed according to cervical vertebral maturation stages. Pre- and post-treatment/observation mean changes and differences (T2-T1 were compared by means of Wilcoxon sign rank and Mann-Whitney U-tests, respectively. Intergroup comparisons between different cervical stages were performed by means of Kruskal-Wallis test and Mann-Whitney U-test (p ≤ 0.05 . Results: When compared with controls, there was a significant reduction in ANB angle (p < 0.001, which was due to a change in SNB angle in CS-2 and CS-3 (p < 0.001, and in SNA (p < 0.001 and SNB (p = 0.016 angles in the CS-4 group. There was significant increase in the GoGn-SN angle in CS-2 (p = 0.007 and CS-4 (p = 0.024, and increase in Co-Gn and Go-Gn amongst all cervical stages (p < 0.05. There was significant decrease in U1-SN and increase in IMPA amongst all cervical stages (p < 0.05. There was significant retraction of the upper lip in CS-3 (p = 0.001, protrusion of the lower lip in CS-2 (p = 0.005, increase in nasolabial angle in CS-4 (p = 0.006 and Z-angle in CS-3 (p = 0.016, reduction in H-angle in CS-2 (p = 0.013 and CS-3 (p = 0.002 groups. When pre- and post-treatment mean differences were compared between different cervical stages, significant differences were found for SNA, SNB and UI-SN angles and overjet. . Conclusions: The Twin-Block along with the normal craniofacial growth improves facial esthetics in Class II, Division 1 malocclusion by changes in underlying skeletal and

  8. Uso do aparelho de Thurow no tratamento da má oclusão esquelética de Classe II The use of Thurow's appliance in the treatment of skeletal class II malocclusion

    Directory of Open Access Journals (Sweden)

    Maíra Massuia de Souza

    2005-08-01

    Full Text Available O objetivo deste trabalho foi realizar uma revisão de literatura em relação ao tratamento da má oclusão esquelética de Classe II com a utilização do splint maxilar removível associado à tração alta, realçando sua influência no crescimento ósseo e seus benefícios. Através do relato do caso clínico será mostrada a confecção e os efeitos do aparelho de Thurow quando utilizado no período da dentadura mista, para a correção da Classe II esqueléticaThe aim of this study was to review the literature concerning the treatment of Class II malocclusion with removable maxillary splint associated to the high traction, enhancing its influence in the bony growth and its benefits. This clinical case will show the fabrication and the effects of Thurow's appliance, when it's used in the mixed dentition for the correction skeletal class II malocclusion.

  9. Aspects Regarding the Medical Data Processing - The Statistical Study of Malocclusions

    Directory of Open Access Journals (Sweden)

    Georgeta ZEGAN

    2012-11-01

    Full Text Available An important aspect in the analysis of medical data is represented by their statistical processing, which gives useful directions in finding the diagnosis and the most adequate treatment, especially when the amount of statistical data is very large and extended in time. We give an example in this paper, by presenting a statistical evaluation on a consignment of patients who have addressed the Dental Ambulatory for Children (Iaşi for orthodontic consulting over a period of 10 years (2000 – 2010. The study has been performed on 375 patients (157 boys and 218 girls, with ages between 4-24 years and malocclusions. The diagnosis was established by clinical and paraclinical exams (cast and radiological measurements. Both removable and fixed appliances were used in conducting the treatment. The patients in need of orthodontic treatment presented malocclusion I-st Class 63,2%, II-nd Class 28,3%, and III-rd Class 5,8%. The group and isolated malocclusion proportion varied on the basis of the clinical manifestations associated to the malocclusion class. Based on age, the patients were applied with prophylactic treatment 3%, interceptive treatment 5% and curative 92%. The Pearson correlations made on the sample of patients proved the existence of a directly proportional connection between the therapeutic results, the diagnosis of the malocclusions and the treatment chosen to be carried out. The results regarding the prevalence malocclusion types are comparable with those from the literature. The correlations that were carried out were based on medical reasoning. All these results are useful to depict the general characteristics of the Dental Ambulatory’s potential patients and, as a consequence, to establish easier the most accurate treatment.

  10. Symmetric analysis of bilateral condylar movement traces before and after orthognathic surgery for skeletal Classmalocclusion%骨性Ⅲ类正颌手术前后髁突运动对称性分析

    Institute of Scientific and Technical Information of China (English)

    孟菲; 高晓辉; 杨晓江; 廖囡囡; 温黎明

    2012-01-01

    目的 测量骨性Ⅲ类错患者正颌手术前后髁突下颌边缘运动的对称性,探讨成人骨性Ⅲ类错患者正颌术后髁突运动功能的恢复情况.方法 选取成人骨性Ⅲ类错患者15人,分别在术前、术后6个月、术后9个月,运用下颌三维超声定位技术.ARCUSdigma系统对最大张口和前伸运动时两侧髁突对称性进行分析.结果 下颌最大张口和前伸运动时,骨性Ⅲ类患者术前和术后6个月组的双侧髁突运动轨迹在冠状向上不一致,差异有统计学意义(P0.05).结论 成人骨性Ⅲ类错患者正颌术后9个月时下颌功能性运动逐渐趋于正常,提示应将正颌手术后正畸时间保持在9个月以上.%Objective To investigate the condylar movement traces before and after orthognathic surgery for skeletal Class IH malocclusion. Methods In 15 skeletal Class III adult malocclusion patients , the condylar movements were recorded during maximum open -closing and protrusive movement of the mandible before surgery , and six and nine months after surgery by using ARCUS digma mandibular moving track analysis system . Results The bilateral condylar movements in the coronal plane showed significant differences in maximum open -closing movement before surgery and the sixth month after surgery (P < 0. 05 ) . The condylar movement exhibited normal nine months after surgery . Conclusion The functional movements of the mandible became stable ninth months after surgery . Therefore, the orthodontic treatment time for over nine months were suggested after orthognathic surgery .

  11. 骨性Ⅲ类错(牙合)下前牙区牙槽骨形态的锥形束CT分析%Preliminary cone-beam computed tomography study of alveolar bone of anterior mandible in adults with skeletal Classmalocclusion

    Institute of Scientific and Technical Information of China (English)

    张莉; 王博; 房兵

    2012-01-01

    PURPOSE: To evaluate the thickness of alveolar bone of mandibular anterior teeth in adults with skeletal Classmalocclusion by a method of detailed cone-beam computed tomography (CBCT) images. METHODS: The subjects were 45 untreated patients with skeletal Class III malocclusion and 45 untreated patients with skeletal Class I malocclusion. They were divided into 2 groups: skeletal Class III and skeletal Class I patients. Tomography was carried out using KODAK9000C 3D volume scanner before orthodontic treatment. Three-dimensional CBCT software (Kodak dental imaging software 3D module v 2.4, Eastman Kodak Company, French) was used to measure the labial, lingual and total thickness of alveolar bone of mandibular anterior teeth by 6 reference points. The thicknesses of alveolar bone of both groups were measured along an axial plane at mandibular anterior teeth root apex levels from a CBCT image. Differences between the 2 groups were analyzed by using group t test with SPSS16.0 software package. RESULTS: The thickness of the alveolar bone of mandibular anterior teeth was greater in the skeletal Class I than the skeletal Class III subjects. There was significant (P<0.05) difference between the two groups. CONCLUSIONS: The thickness of alveolar bone of mandibular anterior segment was obviously thinner in the skeletal Class III malocclusion than that in Class I. More attention was recommended to be paid in skeletal Glass HI patient. Supported by National Natural Science of China (10972142), Research Fund of Science and Technology Commission of Shanghai Municipality (08411961600) and Program for Innovative Research Team of Shanghai Municipal Education Commission.%目的:应用锥形束CT(cone-beam computed tomography,CBCT)评价骨性Ⅲ类和骨性I类错猞患者下颌切牙区 牙槽骨形态的差异。方法:选取45例恒牙期骨性Ⅲ类错治病例及45例恒牙期骨性I类错骀病例矫治前的CBCT图 像,测量下切牙区

  12. Study in the mesiodistal width of teeth and Bolton index of Angle's Classmalocclusion patient%安氏Ⅱ类错(牙合)畸形牙冠宽度和Bolton指数测量分析

    Institute of Scientific and Technical Information of China (English)

    陈沐; 李正明; 刘学; 冯志才; 黄永谦

    2013-01-01

    目的 分析安氏Ⅱ类错(牙合)畸形患者的Bolton指数,并探讨其上下牙量关系对其症状及疗效的影响.方法 以安氏Ⅱ类1分类和2分类错(牙合)畸形患者各100例为研究对象,分别进行牙冠宽度测量并计算Bolton指数.结果 安氏Ⅱ类1分类错(牙合)的前牙宽度比安氏Ⅱ类2分类错(牙合)大,差异有统计学意义.Bolton指数不调的基本分布情况为:指数正常组>指数过小组>指数过大组.Bolton指数前牙比和全牙比呈现安氏Ⅱ类2分类错(牙合)>安氏Ⅱ类1分类错(牙合),但其差异无统计学意义.结论 安氏Ⅱ类错(牙合)中有约50%病例Bolton指数在正常值范围之外,存在上下牙量不协调.%Objective To investigate Bolton index of Angle's Classmalocclusion patients and to study the influences of an upper and lower tooth size relations on the symptoms and curative effect.Methods 100 casts of Class Ⅱ division 1 and Class Ⅱ division 2 malocclusion were selected,respectively.Mesiodistal width of teeth was measured and Bolton Index was calculated.Results The results indicated that the sum of mesiodistal width of maxillary anterior teeth in Class Ⅱ division 1 malocclusion were larger than that in Class Ⅱ division 2 malocclusion with significant differentce.The ratio of Bolton Index among the normal ranges was larger than that among lower ranges and among higher ranges.Bolton Index of Class Ⅱ division 2 malocclusion was larger than that Class Ⅱ division 1 malocclusion without ignificant differentce.Conclusion More than half of all patients have the Bolton ratio outside the normal ranges and the maxillary and mandibular teeth size discrepancy.

  13. AngleⅡ类错患者髁突表面积与体积三维重建测量%Three-dimensional reconstruction study of condyle volume and surface area in Angle′s class II malocclusion patients

    Institute of Scientific and Technical Information of China (English)

    杨珊; 何科; 任嫒姝; 戴红卫

    2012-01-01

    目的 运用锥束CT(CBCT)测量AngleⅡ类错患者髁突的表面积和体积,探讨AngleⅡ类错患者髁突形态大小的特点.方法 选择该院正畸科就诊患者中年龄为20~28岁的AngleⅡ类错患者66例(男33例,女33例)进行CBCT检查,运用Mimics10.0软件对左、右两侧髁突进行三维重建,测量其表面积与体积,计算髁突形态指数.并与AngleⅠ类错患者髁突大小进行比较.结果 AngleⅡ类错患者男性的髁突体积与表面积均大于女性(P0.05).结论 AngleⅡ类错患者的髁突大小与性别和髁突位置有关.且AngleⅡ类错患者髁突小于AngleⅠ类错患者.%Objective To measure the condyle volume and surface area in the patients with Angle s classmalocclusion by cone beam CT(CBCT) and to study the characteristics of mandibular condylar size. Methods 66 young patients with Angle's classmalocclusion were chosen from our hospital(aged 20 - 28 years;33 males and 33 females). All patients received CBCT examina tion,the CT slice used the Mimics 10. 0 software for three dimensional reconstruction of the condyle to measure the condyle vol ume,surface area and shape index(ratio of volume and surface area). The comparison between classmalocclusion patients and classmalocclusion patients was performed. Results The condyle volume and surface area in male patients with class Ⅱ maloc elusion were significantly greater than those in female patients(P0. 05). Conclusion The condyle volume is related to the genders and condyle position. The size of man dibular condyle in classmalocclusion patients is smaller than classmalocclusion patients.

  14. Videofluoroscopy of the oral phase of swallowing in eight to twelve years old children with dental malocclusion.

    Science.gov (United States)

    Junqueira, Patricia; Costa, Milton Melciades

    2013-11-01

    The objective of this study was to describe the oral phase of swallowing in individuals with dental malocclusion and to generate data that would contribute to the rehabilitation of those patients. The study was based on the evaluation of the swallowing system through videofluoroscopy on thirty-four children of both genders, aged eight to twelve years old who present with Angle Class II and III dental malocclusions. Thirteen children of similar age and gender presenting normal dental occlusion formed the control group. The results indicated that the oral phase of swallowing is different between individuals with normal occlusion and malocclusion. Dental occlusion types Angle Class II and III did not present a swallowing pattern, independently of the amount of liquid ingested. The swallowing appeared effective in the oral phase of individuals with dental malocclusion, even though adaptations were identified. The outcome, in the absence of a single pattern and the efficiency of the adapted swallowing demonstrates, first a need for additional research investigating orofacial myofunctional treatment for patients with malocclusion and second how such analyses should focus on contributing positively to the rehabilitation of these patients.

  15. Surgical-orthodontic correction of a Class III dentofacial deformity

    Directory of Open Access Journals (Sweden)

    Raghu Devanna

    2010-01-01

    Full Text Available This case report describes the surgical-orthodontic treatment of a 26-year-old post-pubertal male patient with a Class III dentofacial deformity. In the pre-surgical orthodontic phase of treatment, a reverse overjet of 5.5 mm was created and arch compatibility was obtained. A mandibualr set back with BSSO was performed during surgery to restore ideal overjet, overbite, occlusion and optimal esthetics. After 1 year of treatment, the results remained stable.

  16. The characteristics of the arch form of skeletal Classmalocclusion%骨性Ⅲ类错(牙合)患者牙弓形态特征分析

    Institute of Scientific and Technical Information of China (English)

    孙留振; 范向飞; 肖丹娜; 高辉

    2012-01-01

    Objective To study the characteristics of the arch form of skeletal Class ffl malocclusion and provide references for diagnosis and treatment plan. Methods 7 indexes in dental casts of 47 patients with skeletal Class ffl malocclusion and 50 individuals with normal occlusion were measured respectively. And differences between corresponding upper and lower measurements were calculated. Independent samples (-test was employed for comparing between the two groups by SPSS 17.0. Results Compared with normal occlusion sample, Class 0 malocclusion group had smaller anterior segment lengths and larger canine angles (P<0.05). Differences between upper and lower first pre-molar widths were larger in males with skeletal Class Iff malocclusion. And differences between upper and lower anterior segment lengths were smaller in males with skeletal Class M malocclusion (P<0.05). Conclusion Arch widths of patients with skeletal Class ID malocclusion are basically normal. The lengths of anterior segment are smaller and the anterior arch forms are straighter.%目的 探讨骨性Ⅲ类错(牙合)患者的牙弓形态特征,为临床诊断和治疗提供理论依据.方法 选择骨性Ⅲ类错(牙合)患者47例为实验组,个别正常(牙合)50例为对照组,在石膏模型上测量与牙弓形态特征相关的7个项目,计算上下颌相应测量项目之差,采用SPSS 17.0软件对数据进行独立样本t检验.结果 实验组的上颌牙弓前段长度小于对照组,上颌尖牙角大于对照组(P<05);男性实验组的上下颌第一前磨牙间宽度之差大于对照组,牙弓前段长度之差小于对照组(P<0.05).结论 骨性Ⅲ类错(牙合)患者的牙弓宽度基本正常,但牙弓前段长度不足,且前段弓形较为平直.

  17. Malocclusion and Its Relation to Headform

    Directory of Open Access Journals (Sweden)

    Rio Sofwanhadi

    2015-11-01

    Full Text Available A study was carried out to get impression on the relationship of headroom, type of malocclusion, and facial profile on groups of male and female students of Faculty of Medicine, the University of Indonesia, Jakarta. THe result showed that the biggest part of either male or female students had hyperbrachycephaly - brachycephaly head index, malocclusion typer III and retrognathic - orthognathic facial profile on male students and orthognathic - retrognathic facial profile on female students.

  18. 前方牵引器矫治骨性Ⅲ类错(牙合)的临床研究进展%Clinical outcomes of maxillary protracting appliance in skeletal Classmalocclusion.

    Institute of Scientific and Technical Information of China (English)

    梁淑贤; 刘琳

    2009-01-01

    骨性Ⅲ类错牙A是临床上常见的一种颌面发育畸形.病因及颅面特征复杂,诊断与治疗难度较大.42%~63%的骨性Ⅲ类错(牙合)伴有不同程度的上颌骨发育不足.因此,临床上多使用前方牵引器联合上腭快速扩弓对骨性Ⅲ类错(牙合)进行早期矫治.本文将从前方牵引对颌面软硬组织、气道的影响,以及临床应用方面做一综述.%Skeletal Classmalocclusion is common developmental deformity. The cause and the craniofacial struc-ture are too complex to get the consummate diagnosis and treatment from ordinary orthodontist. About 42 ~ 63% of skele-tal Classmalocclusion is combined with varying degrees of maxillary hypoplaaia, so maxillary protraction with rapidly palatal expansion is an effective treatment for skeletal Classmalocclusion in early period. Eligible literature was re-viewed and the influence of maxillary protraction assessed in skeletal Class Ⅲ subjects on soft and hard tissue, airway,and clinical application.

  19. 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.

  20. Compensation trends of the angulation of first molars: retrospective study of 1403 malocclusion cases.

    Science.gov (United States)

    Su, Hong; Han, Bing; Li, Sa; Na, Bin; Ma, Wen; Xu, Tian-Min

    2014-09-01

    We investigated the compensatory trends of mesiodistal angulation of first molars in malocclusion cases. We compared differences in the angulation of first molars in different developmental stages, malocclusion classifications and skeletal patterns. The medical records and lateral cephalogrammes of 1403 malocclusion cases taken before treatment were measured to evaluate compensation of molar angulation in relation to the skeletal jaw. The cases were stratified by age, Angle classification and skeletal patterns. Differences in the mesiodistal angulation of the first molars were compared among the stratifications. We observed three main phenomena. First, angulation of the upper first molar varied significantly with age and tipped most distally in cases aged 16 years. The lower first molar did not show such differences. Second, in Angle Class II or skeletal Class II cases, the upper first molar was the most distally tipped, the lower first molar was the most mesially tipped, and opposite angulation compensation was observed in Class III cases. Third, in high-angle cases, the upper and lower first molars were the most distally tipped, and opposite angulation compensation was observed in low-angle cases. These data suggest that the angulation of the molars compensated for various growth patterns and malocclusion types. Hence, awareness of molar angulation compensation would help to adjust occlusal relationships, control anchorage and increase the chances of long-term stability.

  1. Compensation trends of the angulation of first molars:retrospective study of 1 403 malocclusion cases

    Institute of Scientific and Technical Information of China (English)

    Hong Su; Bing Han; Sa Li; Bin Na; Wen Ma; Tian-Min Xu

    2014-01-01

    We investigated the compensatory trends of mesiodistal angulation of first molars in malocclusion cases. We compared differences in the angulation of first molars in different developmental stages, malocclusion classifications and skeletal patterns. The medical records and lateral cephalogrammes of 1 403 malocclusion cases taken before treatment were measured to evaluate compensation of molar angulation in relation to the skeletal jaw. The cases were stratified by age, Angle classification and skeletal patterns. Differences in the mesiodistal angulation of the first molars were compared among the stratifications. We observed three main phenomena. First, angulation of the upper first molar varied significantly with age and tipped most distally in cases aged ,12 years and least distally in cases aged .16 years. The lower first molar did not show such differences. Second, in Angle Class II or skeletal Class II cases, the upper first molar was the most distally tipped, the lower first molar was the most mesially tipped, and opposite angulation compensation was observed in Class III cases. Third, in high-angle cases, the upper and lower first molars were the most distally tipped, and opposite angulation compensation was observed in low-angle cases. These data suggest that the angulation of the molars compensated for various growth patterns and malocclusion types. Hence, awareness of molar angulation compensation would help to adjust occlusal relationships, control anchorage and increase the chances of long-term stability.

  2. 77 FR 48167 - Approved Tribal-State Class III Gaming Compact; Indian Gaming

    Science.gov (United States)

    2012-08-13

    ... Bureau of Indian Affairs Approved Tribal--State Class III Gaming Compact; Indian Gaming AGENCY: Bureau of Indian Affairs, Interior. ACTION: Notice of Approved Tribal--State Class III Gaming Compact. SUMMARY... the purpose of engaging in Class III gaming activities on Indian lands. The Compact permits the...

  3. 77 FR 45370 - Renewal of Agency Information Collection for Class III Gaming; Tribal Revenue Allocation Plans...

    Science.gov (United States)

    2012-07-31

    ... Bureau of Indian Affairs Renewal of Agency Information Collection for Class III Gaming; Tribal Revenue...) approval for the collection of information for Class III Gaming Procedures authorized by OMB Control Number.... Abstract The Acting Assistant Secretary--Indian Affairs is seeking comments on the Class III...

  4. 21 CFR 807.94 - Format of a class III certification.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Format of a class III certification. 807.94... IMPORTERS OF DEVICES Premarket Notification Procedures § 807.94 Format of a class III certification. (a) A class III certification submitted as part of a premarket notification shall state as follows: I...

  5. 40 CFR 147.3011 - Plugging and abandonment of Class III wells.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Plugging and abandonment of Class III... abandonment of Class III wells. To meet the requirements of § 146.10(d) of this chapter, owners and operators of Class III uranium projects underlying or in aquifers containing up to 5,000 mg/l TDS which...

  6. 14 CFR 21.333 - Issue of export airworthiness approval tags for Class III products.

    Science.gov (United States)

    2010-01-01

    ... for Class III products. 21.333 Section 21.333 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Approvals § 21.333 Issue of export airworthiness approval tags for Class III products. (a) An applicant is entitled to an export airworthiness approval tag for Class III products if that applicant shows, except...

  7. 25 CFR 522.6 - Approval requirements for class III ordinances.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 2 2010-04-01 2010-04-01 false Approval requirements for class III ordinances. 522.6... AND CLASS III ORDINANCES AND RESOLUTIONS SUBMISSION OF GAMING ORDINANCE OR RESOLUTION § 522.6 Approval requirements for class III ordinances. No later than 90 days after the submission to the Chairman under §...

  8. 78 FR 4094 - Effective Date of Requirement for Premarket Approval for Two Class III Preamendments Devices

    Science.gov (United States)

    2013-01-18

    ... Approval for Two Class III Preamendments Devices AGENCY: Food and Drug Administration, HHS. ACTION... the following two class III preamendments devices: Hip joint metal/metal semi- constrained, with a... class III (premarket approval). Under section 513 of the FD&C Act, devices that were in...

  9. 76 FR 43701 - Renewal of Agency Information Collection for Class III Tribal State Gaming Compact Process...

    Science.gov (United States)

    2011-07-21

    ... Bureau of Indian Affairs Renewal of Agency Information Collection for Class III Tribal State Gaming... the collection of information for the Class III Tribal State Gaming Compact Process. The information... for the information collection conducted under 25 CFR 293, Class III Tribal State Gaming...

  10. 77 FR 68812 - Renewal of Agency Information Collection for Class III Gaming; Tribal Revenue Allocation Plans...

    Science.gov (United States)

    2012-11-16

    ... Bureau of Indian Affairs Renewal of Agency Information Collection for Class III Gaming; Tribal Revenue... collection of information for Class III Gaming Procedures authorized by OMB Control Number 1076-0149, Tribal.... Abstract The Assistant Secretary--Indian Affairs is seeking comments on the Class III Gaming...

  11. 40 CFR 147.3108 - Plugging Class I, II, and III wells.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Plugging Class I, II, and III wells... Certain Oklahoma Indian Tribes § 147.3108 Plugging Class I, II, and III wells. In addition to the... well: (a) For Class I and III wells: (1) The well shall be filled with mud from the bottom of the...

  12. A study of the mandibular characteristic in genetic Classmalocclusion%安氏Ⅲ类错(牙合)下颌形态遗传性特征的研究

    Institute of Scientific and Technical Information of China (English)

    刘娜; 王建国

    2011-01-01

    目的 通过对安氏Ⅲ类错(牙合)患者与个别正常(牙合),以及与其父母的下颌骨形态特征的对比研究,探讨安氏Ⅲ类错(牙合)下颌骨的特征性指标和亲子代间的相关规律,以及两者间的关系.初步探讨安氏Ⅲ类错(牙合)下颌骨的遗传特征,并为正畸临床的诊断、治疗方案和预后判断提供参考依据.方法 通过88例安氏Ⅲ类错(牙合)与100例个别正常(牙合)下颌骨形态比较,找到安氏Ⅲ类错(牙合)下颌骨的特征性指标,分析特征性指标与非特征性指标亲子间相关关系的差异.结果 ①69项测量项目中有16项在错(牙合)与正常(牙合)间有显著性差异,且在不同部位中这些指标的分布比例不同,大部分属于硬组织(62.5%),软组织(25%),牙齿槽(12.5%);②通过逐步判别分析,筛选出6项判别指标:唇凸距差,上下颌齿槽座角,上下唇基角,Wits值,下中切牙角,联合变量;③安氏Ⅲ类错(牙合)的特征性指标其亲子间的相似性较非特征性指标强.结论 ①本组安氏Ⅲ类错(牙合)主要由下颌骨硬组织异常所致;②安氏Ⅲ类错(牙合)可能并不是简单地由几种不协调的颅面结构随机组装而成,很可能在某种程度上作为一个整体遗传.%Objective To evaluate the mandibular characteristics of Classmalocclusion and analyze the parent-offspring similarity in Classmalocclusion.The relationship between the characteristics and the similarity was discussed.To study the genetic feature of Classmalocclusion and analyze the clinical implication.Methods Compare the mandibular cephalometric measurements between 88 Classmalocclusion patients and 100 normal occlusion samples to find mandibular cephalometric measurements of Classmalocclusion and analyze the parent-offspring similarity in the mandibular cephalometric measurements.Results ① 16 items among the 69 measurements showed significant difference between the normal

  13. 安氏Ⅱ2类错(牙合)家庭聚集性与遗传度研究%Familial aggregation and heritability of class Ⅱ 2 malocclusion

    Institute of Scientific and Technical Information of China (English)

    陈允嘉; 王豫蓉; 邹林洪; 李艳; 郑雷蕾; 吴艳; 秘双燕; 吴增波; 王强

    2011-01-01

    Objective To explore the role of genetic factor in class Ⅱ 2 malocclusion. Methods 276 pedigrees,including 126 class Ⅱ 2 malocclusion pedigrees and 150 control pedigrees, were investigated in Chongqing area. Familial aggregation was evaluated by binominal analysis. Results The prevalence rate of class Ⅱ 2 malocclusion in first-degree relatives was 25.37%, significantly higher than 6.06% of control pedigrees. The results from binominal distribution analysis showed that actual frequency of class Ⅱ 2 cases were significantly higher than that of theoretical frequency(ρ<0.05), which indicated that there was significant familial aggregation in the occurrence of class Ⅱ 2 malocclusion. The estimated value of control pedigrees was 92.26 %. Conclusion Class Ⅱ 2 mal occlusion shows significantly familial aggregation. Genetic factors play an important role in the incidence of class Ⅱ 2 malocclusion.%目的 通过安氏Ⅱ2类错(牙合)家庭聚集性分析研究以及安氏Ⅱ2类错(牙合)遗传度估算,探讨遗传因素在安氏Ⅱ2类错(牙合)致病机制中的地位.方法 采用遗传流行病学病例对照的方法,对126例安氏Ⅱ2类错(牙合)先证家系及150例对照家系进行对照研究,比较一级亲属患病率.结果 先证组一级亲属总的患病率为25.37%,明显高于对照组一级亲属总患病率(6.60%),患病病例分布的理论频数与实际频数比较差异有统计学意义(P<0.05),一级亲属遗传度估算值为92.26%.结论 安氏Ⅱ2类错(牙合)的发生具有家庭聚集性,遗传因素在该病致病机制中占有重要地位.

  14. 成人骨性Ⅲ类错(牙合)畸形患者发音特征的声学分析%A coustic analysis of pronunciation features of patients with skeletal classmalocclusion

    Institute of Scientific and Technical Information of China (English)

    王立新; 高晓辉; 陈仁吉

    2012-01-01

    目的 通过对正常发音者与成人骨性Ⅲ类错(牙合)畸形患者发音的声学特性比较,探讨其发音规律和机制.方法 针对20名正常对照组和16名骨性Ⅲ类错(牙合)畸形患者的语音样本进行元音和辅音的声学分析,将结果进行统计学比较.结果 成人骨性Ⅲ类错(牙合)畸形患者中男性组元音/i/的第一共振峰频率明显高于正常对照组(P<0.01),而男女两组元音/u/的第二与第三共振峰频率也高于正常组(P<0.05).所观测辅音中成人骨性Ⅲ类错(牙合)畸形患者出现语图错误的总人次占44.3%,其中3个塞擦音/q/、/ch/、/s/发音错误人次最高,而且辅音/c/、/s/的下限频率明显下移(P<0.01),/s/噪音能量强频区位置下降(P<0.01).结论 骨性Ⅲ类错(牙合)畸形患者在发部分元音时,可能存在舌位低且靠前的情况,在发舌面、舌尖以及卷舌塞擦音和擦音时,唇舌软组织可能不能形成足够的摩擦力量与摩擦时间.%Objective To investigate pronunciation patterns and mechanisms in patients with skeletal class HI ntalocclusion. Methods 16 skeletal class Ⅲ patients and 20 normal control cases were chosen to find out the different pronunciation features between the two groups based on the acoustic analysis of vowels and consonants. Results Firstly ,The first formant frequency of vowel /i/ of skeletal class Ⅲ male patients was significantly higher than that of normal adults (P <0.01) ,and the second and third formant frequencies of vowel /u/ of skeletal classⅢ patients were also significantly higher than those of normal adults (P < 0.05). Secondly, the number of skeletal class ID malocclusion patients who made sonogram mistakes accounted for 44. 3% of the total number of people observed. A-mong the consonants, pronuciation of affricates /q/,/ch/,/s/ was mistaken most. Lower limit frequenies of consonants /c/,/s/ de-screased obviously (P < 0.01). Conclusions The tongues of skeletal Class

  15. 25 CFR 522.7 - Disapproval of a class III ordinance.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 2 2010-04-01 2010-04-01 false Disapproval of a class III ordinance. 522.7 Section 522.7 Indians NATIONAL INDIAN GAMING COMMISSION, DEPARTMENT OF THE INTERIOR APPROVAL OF CLASS II AND CLASS III ORDINANCES AND RESOLUTIONS SUBMISSION OF GAMING ORDINANCE OR RESOLUTION § 522.7 Disapproval of a class...

  16. Malocclusions in Xia Dynasty in China

    Institute of Scientific and Technical Information of China (English)

    WANG Wei; ZENG Xiang-long; ZHANG Cheng-fei; YANG Yan-qi

    2012-01-01

    Background The prevalence of malocclusion in modern population is higher than that in the excavated samples from the ancient times.Presently,the prevalence of juvenile malocclusion in the early stage of permanent teeth is as high as 72.92% in China.This study aimed to observe and evaluate the prevalence and severity of malocclusions in a sample of Xia Dynasty in China,and to compare these findings with the modern Chinese population.Methods The material consisted of 38 male and 18 female protohistoric skulls of Xia Dynasty 4000 years ago.Of 86 dental arches,29 cases had the jaw relationships.Tooth crowding,diastema,individual tooth malposition and malocclusion were studied.Results Of the samples,23.3% showed tooth alignment problems including crowding (8.1%),diastema (9.3%),and individual tooth malposition (5.8%).The prevalence of malocclusion was 27.6%,mainly presented as Angle Class Ⅰ.Conclusions It is indicated that over thousands of years from Neolithic Age (6000-7000 years ago) to Xia Dynasty (4000 years ago),the prevalence of malocclusion did not change significantly.The prevalence of malocclusion of Xia Dynasty samples was much lower than that of modern population.

  17. Clinical study of improved Activator on the treatment of Angle classmalocclusion in mixed dentition%改良式肌激动器治疗替牙期安氏Ⅱ类错(牙合)的研究

    Institute of Scientific and Technical Information of China (English)

    韩敏; 王春玲; 高晓丽; 曲竹丽; 呼明燕; 刘铃; 王海任

    2011-01-01

    Objective To evaluate the treatment effects of improved activator on patients with Angle Classmalocclusion in mixed dentition. Methods According to criteria of the study, six patients with Angle Classmalocclusion in mixed dentition were selected and treated with improved Activator. Cephalometrie analysis was performed before and after treatment. Results 1 ) Angle ANB was improved; 2 ) After treatment, overjet and molar relationship was improved; 3 ) Ten wearing hours was needed for treatment everyday; 4)The treatment duration was (5.3 ± 1.4) months. Conclusions Improved Activator could be used for both Angle Class Ⅱ Division 1 malocclusion and Division 2 malocclusion.%目的 观察替牙期安氏Ⅱ类错牙合畸形患者戴用改良式肌激动器后的临床效果.方法 选择符合纳入标准的6名替牙期安氏Ⅱ类错牙 合患者为研究对象,运用改良式肌激动器进行矫治,对患者治疗前后的X线头颅侧位片进行测量、分析和比较.结果 治疗后,患者ANB角均达到正常范围,前牙覆牙 合、覆盖正常,磨牙和尖牙达中性关系;患者戴用肌激动器的时间为平均每天10 h;总疗程平均为(5.3±1.4)个月.结论 改良式肌激动器能够矫治安氏Ⅱ类1分类、2分类错牙合畸形.

  18. Vertical control in the Class III compensatory treatment

    Directory of Open Access Journals (Sweden)

    Márcio Costa Sobral

    2013-04-01

    Full Text Available INTRODUCTION: Compensatory orthodontic treatment, or simply orthodontic camouflage, consists in an important alternative to orthognathic surgery in the resolution of skeletal discrepancies in adult patients. It is important to point that, to be successfully performed, diagnosis must be detailed, to evaluate, specifically, dental and facial features, as well as the limitations imposed by the magnitude of the discrepancy. The main complaint, patient's treatment expectation, periodontal limits, facial pattern and vertical control are some of the items to be explored in the determination of the viability of a compensatory treatment. Hyperdivergent patients who carry a Class III skeletal discrepancy, associated with a vertical facial pattern, with the presence or tendency to anterior open bite, deserve special attention. In these cases, an efficient strategy of vertical control must be planned and executed. OBJECTIVE: The present article aims at illustrating the evolution of efficient alternatives of vertical control in hiperdivergent patients, from the use, in the recent past, of extra-oral appliances on the lower dental arch (J-hook, until nowadays, with the advent of skeletal anchorage. But for patients with a more balanced facial pattern, the conventional mechanics with Class III intermaxillary elastics, associated to an accentuated curve of Spee in the upper arch and a reverse Curve of Spee in the lower arch, and vertical elastics in the anterior region, continues to be an excellent alternative, if there is extreme collaboration in using the elastics.

  19. Malocclusion and articulation disorders in mouth breathing children from public schools in Santa Maria, Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Ana Maria Toniolo da Silva

    2008-01-01

    Full Text Available Objective: To verify the occurrence and types of malocclusion and articulation disorders in mouth breathing children at public schools.Methods: An evaluation was made of 219 children of both genders, between 5 and 12 years of age, attending two public schools in the city of Santa Maria, Rio Grande do Sul, Brazil; with 121 mouth breather children being selected for this study. Orthodontic and phonoaudiological evaluation were made to verify the breathing mode and presence or absence of malocclusion and articulation disorders.Results: It was observed that 100% of the mouth breather children presented malocclusion, 49.60% being Angle’s Class II, 48.76% ClassI and 1.65% Class III. It was also verified that 18.2% of the mouth breather children presented articulation disturbance. Conclusion: All mouth breathing children presented some type of malocclusion, the majority being Angle’s Class II, followed by Class I. The articulation disorders most frequently observed was anterior lisping.

  20. Evaluating condylar position in different skeletal malocclusion patterns: A cephalometric study

    Directory of Open Access Journals (Sweden)

    Sandesh S Hegde

    2015-01-01

    Full Text Available Context: The cranial base and variations in its morphology affect the anterior-posterior positioning of jaws causing changes in the glenoid fossa and condylar position. Aims: To evaluate the condylar position in patients with different skeletal sagittal malocclusion patterns. Materials and Methods: Pretreatment lateral cephalometric radiographs of 112 subjects (both males and females were categorized into three classes (Class I, Class II, Class III based on their ANB angulation and studied for N-S-Ar (saddle angle, S-Ar-Go (articular angle, S-Ar (posterior cranial base length. Statistical Analysis: Shapiro-Wilk test was done to check for normality of the distribution of values. Groups were evaluated using parametric tests (one-way ANOVA. Significance for all tests was predetermined as P < 0.05. Results: N-S-Ar and S-Ar-Go and also S-Ar did not vary significantly in all the three classes. N-S-Ar and S-Ar-Go angles have shown a significant negative correlation in all the three classes. Conclusions: There is no significant difference in condylar position in different skeletal malocclusion patterns. N-S-Ar and S-Ar-Go angles show a negative correlation in any skeletal malocclusion pattern.

  1. Morphological changes in the pharyngeal airway of female skeletal class III patients following bimaxillary surgery: a cone beam computed tomography evaluation.

    Science.gov (United States)

    Li, Y-M; Liu, J-L; Zhao, J-L; Dai, J; Wang, L; Chen, J-W

    2014-07-01

    Using cone beam computed tomography (CBCT), the present study compared three-dimensional (3D) changes in the pharyngeal airway and surrounding tissues in female skeletal class III patients treated with bimaxillary surgery. Twenty-nine female skeletal class III patients with both maxillary hypoplasia and a mandibular excess underwent bilateral sagittal split ramus osteotomy for mandibular setback combined with Le Fort I osteotomy for maxillary advancement. Volumetric measurements were performed using CBCT scans taken at 1 week presurgery and 6 months post-surgery. The oropharynx volumes and the cross-sectional area behind the soft palate decreased significantly. There was an insignificant change in the volume of the nasopharynx (P>0.05). The hyoid bone moved downward and posteriorly after surgery. The morphology of the soft palate also changed dramatically, with an increase in the length and thickness. Negative correlations were found between the pharyngeal airway space and the position of the hyoid bone. The change in morphology of the soft palate was significantly correlated with the changes in hyoid bone position. These 3D results suggest that bimaxillary orthognathic surgery significantly changes the position of the hyoid bone and the soft palate together with a significant decrease in the pharyngeal airway space in the correction of skeletal class III malocclusion.

  2. Steiner analysis of Angle’s class Ⅱ division 1 malocclusion for young adults of Shandong Province%山东地区青少年AngleⅡ1错牙合患者颅面特征的Steiner分析

    Institute of Scientific and Technical Information of China (English)

    刘晓敏; 常维巍; 杨洪涛; 岳保利; 李新颖

    2014-01-01

    目的:探讨山东地区青少年 AngleⅡ1错牙合患者的错牙合机制、颅面形态特征及发育规律。方法:随机抽取在潍坊牙科医院就诊的青少年 AngleⅡ1错牙合患者82例为研究对象,对每位患者拍摄头颅定位侧位 X 线片,使用 Steiner 分析法对颅面部的相关点、线、角进行测量,并将所得的各项测量数据与正常值进行比较。结果:山东地区青少年AngleⅡ1错牙合患者 SNB、ANB、SND、1-NA(mm)、1-NA、1-1(-)、GoGn -SN、SL(mm)的8项测量值与正常值比较差异有统计学意义(P <0.05)。结论:山东地区青少年 An-gleⅡ1错牙合患者上颌基本正常,下颌相对上颌明显后缩,上切牙明显唇倾。%Objective To analyze hard tissues of young adults with Angle’s class Ⅱ division 1 malocclusion by cephalometrics,and separately to investigate in contrast with the standard of normal occlusion in the native area.Methods Selected 82 patients suf ering form young adults with Angle’s class Ⅱ division 1 malocclusion who visited in the stomatological Hospital of Weifang. For each subject,cephalo -metrics radiographs were taken before treatment.The lateral cephalograms of each one were taken and measured by the same orthodontics doctors based on applica-tion of Steiner methods.Results There were dif erence in measurements of SNB、ANB、SND、1 -NA(mm)、1 -NA、1 -1(-)、GoGn -SN、SL(mm)between young adults with Angle’s class Ⅱdivision 1 malocclusion in Shandong Province and normal people(P <0.05).Conclusion The maxil y of young adults with Angle’s class Ⅱ division 1 malocclusion in Shandong Province is nor-mal,and the mandibular is retruded,which makes a distal malocclusion.

  3. The Use of Invisalign® System in the Management of the Orthodontic Treatment before and after Class III Surgical Approach

    Science.gov (United States)

    2016-01-01

    The approach to skeletal dysmorphisms in the maxillofacial area usually requires an orthodontic treatment by means of fixed appliances, both before and after the surgical phase. Since its introduction, Invisalign system has become a popular treatment choice for the clinicians because of the aesthetics and comfort of the removable clear aligners compared with the traditional appliances. Therefore, the aim of the present report was to illustrate the management of a malocclusion by means of Invisalign system associated with the traditional surgical technique. The present paper shows a case of a 23-year-old male patient characterized by a Class III malocclusion with lateral deviation of the mandible to the left side and cross-bite on teeth 2.2, 2.3, and 2.4. Invisalign system was used during the pre- and postsurgical phases rather than fixed appliances. The posttreatment cephalometric analysis emphasized the stability of the dental and skeletal symmetry corrections, occlusion and functional balance, over a 6-year follow-up. The results achieved at the end of the treatment showed how Invisalign can be effective in the management of the orthodontic phases in orthognathic surgery. The follow-up after 6 years emphasizes the stability of the treatment over time. PMID:27429811

  4. The Use of Invisalign® System in the Management of the Orthodontic Treatment before and after Class III Surgical Approach

    Directory of Open Access Journals (Sweden)

    Renato Pagani

    2016-01-01

    Full Text Available The approach to skeletal dysmorphisms in the maxillofacial area usually requires an orthodontic treatment by means of fixed appliances, both before and after the surgical phase. Since its introduction, Invisalign system has become a popular treatment choice for the clinicians because of the aesthetics and comfort of the removable clear aligners compared with the traditional appliances. Therefore, the aim of the present report was to illustrate the management of a malocclusion by means of Invisalign system associated with the traditional surgical technique. The present paper shows a case of a 23-year-old male patient characterized by a Class III malocclusion with lateral deviation of the mandible to the left side and cross-bite on teeth 2.2, 2.3, and 2.4. Invisalign system was used during the pre- and postsurgical phases rather than fixed appliances. The posttreatment cephalometric analysis emphasized the stability of the dental and skeletal symmetry corrections, occlusion and functional balance, over a 6-year follow-up. The results achieved at the end of the treatment showed how Invisalign can be effective in the management of the orthodontic phases in orthognathic surgery. The follow-up after 6 years emphasizes the stability of the treatment over time.

  5. The Use of Invisalign® System in the Management of the Orthodontic Treatment before and after Class III Surgical Approach.

    Science.gov (United States)

    Pagani, Renato; Signorino, Fabrizio; Poli, Pier Paolo; Manzini, Pietro; Panisi, Irene

    2016-01-01

    The approach to skeletal dysmorphisms in the maxillofacial area usually requires an orthodontic treatment by means of fixed appliances, both before and after the surgical phase. Since its introduction, Invisalign system has become a popular treatment choice for the clinicians because of the aesthetics and comfort of the removable clear aligners compared with the traditional appliances. Therefore, the aim of the present report was to illustrate the management of a malocclusion by means of Invisalign system associated with the traditional surgical technique. The present paper shows a case of a 23-year-old male patient characterized by a Class III malocclusion with lateral deviation of the mandible to the left side and cross-bite on teeth 2.2, 2.3, and 2.4. Invisalign system was used during the pre- and postsurgical phases rather than fixed appliances. The posttreatment cephalometric analysis emphasized the stability of the dental and skeletal symmetry corrections, occlusion and functional balance, over a 6-year follow-up. The results achieved at the end of the treatment showed how Invisalign can be effective in the management of the orthodontic phases in orthognathic surgery. The follow-up after 6 years emphasizes the stability of the treatment over time.

  6. Treatment of Class II malocclusion with bialveolar protrusion by means of unusual extractions and anchorage mini-implant

    OpenAIRE

    Jong-Moon Chae

    2012-01-01

    INTRODUCTION: Patients with dental Class II bialveolar protrusion are generally treated by extracting the four first premolars or two first and two second premolars, and retracting the anterior teeth. This case report describes the treatment of an adult patient with bialveolar protrusion, a Class II canine and molar relationship, and lip protrusion. METHODS: In this patient, the maxillary right second molar (1.7) had to be extracted due to extensive caries. To create sufficient space to retra...

  7. 40 CFR 144.28 - Requirements for Class I, II, and III wells authorized by rule.

    Science.gov (United States)

    2010-07-01

    ... annular pressure; (iii) The results from ground-water monitoring wells prescribed in paragraph (g)(1)(iii... drinking water and the well bore is prohibited. (2) The owner or operator of a Class I, II or III injection... water. (ii) For Class II wells: (A) The owner or operator shall not exceed a maximum injection...

  8. The shape and size of the sella turcica in skeletal Class I, Class II, and Class III Saudi subjects.

    Science.gov (United States)

    Alkofide, Eman A

    2007-10-01

    The purpose of this study was to describe the shape and measure the size of the sella turcica in Saudi subjects with different skeletal types. Lateral cephalometric radiographs of 180 individuals (90 males and 90 females) with an age range of 11-26 years were taken and distributed according to skeletal classification; 60 Class I, 60 Class II, and 60 Class III. The sella turcica on each radiograph was analysed and measured to determine the shape of the sella, in addition to the linear dimensions of length, depth, and diameter. A Student's t-test was used to calculate differences in linear dimensions, while a one-way analysis of variance was performed to study the relationship between skeletal type and sella size. The results show that the sella turcica presented with a normal morphology in the majority of subjects (67 per cent). No significant differences in linear dimensions between genders could be found. When age was evaluated, significant differences were found between the older (15 years or more) and the younger (11-14 years) age groups at the 0.01 and 0.001 levels for length, depth, and diameter. Sella size of the older age group was larger than in the younger age group. When skeletal type was compared with sella size, a significant difference was found in the diameter of sella between the Class II and Class III subjects (P sella turcica area in Saudi subjects.

  9. Do malocclusion and Helkimo Index ≥ 5 correlate with body posture?

    Science.gov (United States)

    Perillo, L; Femminella, B; Farronato, D; Baccetti, T; Contardo, L; Perinetti, G

    2011-04-01

    Whether there are correlations between the stomatognathic system and body posture remains controversial. Here, we have investigated whether malocclusal traits and having a Helkimo Index ≥ 5 show detectable correlations with body-posture alterations in children and young adults. A total of 1178 11- to 19-year-old subjects were divided into four groups: (i) controls; (ii) malocclusion; (iii) Helkimo Index ≥ 5 and (iv) malocclusion + Helkimo Index ≥ 5. Dental occlusion assessment included the following: overbite, overjet, posterior crossbite, scissorbite, mandibular crowding and dental class. Subsequently, body-posture assessments were performed through static analyses of body inclination and trunk asymmetry, and according to the dynamic Fukuda stepping test. Univariate and multivariate statistical analyses were performed. Although at the univariate level both the trunk asymmetry and Fukuda stepping test showed significant differences among the groups, the multivariate level revealed that age and gender were mostly responsible for this. The only significant correlation that was seen was for the malocclusion + Helkimo Index ≥ 5 group: these subjects had a positive (worse) trunk asymmetry and a negative (better) Fukuda stepping test performance. At the further multivariate analyses of each single malocclusal trait ⁄Helkimo Index ≥ 5 (irrespective of the groups), only an increased overbite showed a statistically significant association with a slightly better Fukuda stepping test performance. Given the small number of significant associations seen and their limited entities, this study does not support the existence of clinically relevant correlations for malocclusal traits and Helkimo Index ≥ 5 with body posture in children and young adults.

  10. Azimilide dihydrochloride: a new class III anti-arrhythmic agent.

    Science.gov (United States)

    Abrol, R; Page, R L

    2000-11-01

    Azimilide dihydrochloride (Stedicor) is a new class III anti-arrhythmic agent that is being developed by Proctor & Gamble to treat supraventricular and ventricular arrhythmias. Development of this agent is being undertaken due to the high prevalence of atrial fibrillation and the lack of satisfactory therapy for this arrhythmia, along with the desire to develop therapy to reduce the risk of life-threatening ventricular arrhythmias in patients following myocardial infarction. The mechanism of action of azimilide is to block both the slowly conducting (I(Ks)) and rapidly conducting (I(Kr)) rectifier potassium currents in cardiac cells. This differs from other class III agents that block I(Kr) exclusively or in combination with sodium, calcium, or transient outward (I(to)) potassium current channels. Azimilide is distinguished by a relative lack of reverse use-dependence, excellent oral absorption, no need for dose titration, an option for out-patient initiation, no need for adjustment associated with renal or liver failure and a lack of interaction with warfarin or digoxin. It carries some risk of torsade de pointes and rarely, neutropoenia. Azimilide has shown dose-related efficacy in prolonging the time to recurrence of atrial fibrillation. A large trial examining the impact of azimilide on mortality in high-risk patients following myocardial infarction has completed enrolment and should yield data in the next couple of years and further studies are planned. Even if this trial fails to show a survival benefit, a neutral effect on mortality will make the agent attractive for atrial arrhythmias.

  11. Novel three dimensional position analysis of the mandibular foramen in patients with skeletal class III mandibular prognathism

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Sang Hoon; Kim, Yeon Ho; Won, Yu Jin; Kim, Moon Key [Dept. of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang (Korea, Republic of)

    2016-06-15

    To analyze the relative position of the mandibular foramina (MnFs) in patients diagnosed with skeletal class III malocclusion. Computed tomography (CT) images were collected from 85 patients. The vertical lengths of each anatomic point from the five horizontal planes passing through the MnF were measured at the coronoid process, sigmoid notch, condyle, and the gonion. The distance from the anterior ramus point to the posterior ramus point on the five horizontal planes was designated the anteroposterior horizontal distance of the ramus for each plane. The perpendicular distance from each anterior ramus point to each vertical plane through the MnF was designated the horizontal distance from the anterior ramus to the Mn F. The horizontal and vertical positions were examined by regression analysis. Regression analysis showed the heights of the coronoid process, sigmoid notch, and condyle for the five horizontal planes were significantly related to the height of the MnF, with the highest significance associated with the MnF-mandibular plane (coefficients of determination (R2): 0.424, 0.597, and 0.604, respectively). The horizontal anteroposterior length of the ramus and the distance from the anterior ramus point to the MnF were significant by regression analysis. The relative position of the MnF was significantly related to the vertical heights of the sigmoid notch, coronoid process, and condyle as well as to the horizontal anteroposterior length of the ascending ramus. These findings should be clinically useful for patients with skeletal class III mandibular prognathism.

  12. Novel three-dimensional position analysis of the mandibular foramen in patients with skeletal class III mandibular prognathism

    Science.gov (United States)

    Kim, Yeon-Ho; Won, Yu-Jin; Kim, Moon-Key

    2016-01-01

    Purpose To analyze the relative position of the mandibular foramina (MnFs) in patients diagnosed with skeletal class III malocclusion. Materials and Methods Computed tomography (CT) images were collected from 85 patients. The vertical lengths of each anatomic point from the five horizontal planes passing through the MnF were measured at the coronoid process, sigmoid notch, condyle, and the gonion. The distance from the anterior ramus point to the posterior ramus point on the five horizontal planes was designated the anteroposterior horizontal distance of the ramus for each plane. The perpendicular distance from each anterior ramus point to each vertical plane through the MnF was designated the horizontal distance from the anterior ramus to the MnF. The horizontal and vertical positions were examined by regression analysis. Results Regression analysis showed the heights of the coronoid process, sigmoid notch, and condyle for the five horizontal planes were significantly related to the height of the MnF, with the highest significance associated with the MnF-mandibular plane (coefficients of determination (R2): 0.424, 0.597, and 0.604, respectively). The horizontal anteroposterior length of the ramus and the distance from the anterior ramus point to the MnF were significant by regression analysis. Conclusion The relative position of the MnF was significantly related to the vertical heights of the sigmoid notch, coronoid process, and condyle as well as to the horizontal anteroposterior length of the ascending ramus. These findings should be clinically useful for patients with skeletal class III mandibular prognathism. PMID:27358814

  13. Latent Class Analysis of Differential Item Functioning on the Peabody Picture Vocabulary Test-III

    Science.gov (United States)

    Webb, Mi-young Lee; Cohen, Allan S.; Schwanenflugel, Paula J.

    2008-01-01

    This study investigated the use of latent class analysis for the detection of differences in item functioning on the Peabody Picture Vocabulary Test-Third Edition (PPVT-III). A two-class solution for a latent class model appeared to be defined in part by ability because Class 1 was lower in ability than Class 2 on both the PPVT-III and the…

  14. 两种不同前方牵引矫治器矫治替牙早期骨性Ⅲ类错的临床研究%Clinical study of maxillary protraction appliance combined with modified Nance arch and maxillary protraction and rapid palatal expansion in skeletal classmalocclusion

    Institute of Scientific and Technical Information of China (English)

    冉屹东; 刘璇

    2015-01-01

    目的:临床研究改良Nance弓前方牵引矫治器和树脂冠腭开展前方牵引矫治器,观察这两种不同形式的前方牵引对替牙早期骨性Ⅲ类错治疗前后骨骼、牙齿、面型的变化,评价其临床矫治效果。方法选择24例替牙早期骨性Ⅲ类错畸形患者,分别应用改良Nance弓前方牵引矫治器和树脂冠腭开展前方牵引矫治器进行治疗,通过两组X线头颅侧位片进行测量,比较治疗前后软硬组织的变化。结果两个治疗组SNA、ANB、NA-PA、Ptm-A均增大,A点分别前移1.99 mm和2.61 mm,且有统计学意义(P<0.05)。结论两种前方牵引矫治器治疗替牙早期骨性Ⅲ类错均有效,有利于Ⅲ类骨骼的调整,但树脂冠腭开展前方牵引组A点前移较多。%Objective To compare the clinical investigation of maxillary protraction appliance combined with modified Nance arch and maxillary protraction and rapid palatal expansion and evaluate the changes of patients with skeletal class III malocclusion in skeletal ,dental, profile and before and after the treatment to evaluate the clinical efficacy. Methods 24 patients with skeletal classⅢ malocclusion in mixed dentition were divided into two groups who were treated with maxillary protraction combined with modified Nance arch and maxillary protraction and rapid palatal expansion. Cephalometric radiographs were analyzed to evaluate skeletodental and profile changes before and after treatment. Results SNA and ANB angle, NA-PA, Ptm-A, were increased and subspinales were protracted by 1.99 mm and 2.61 mm. All of the changes were statistically significant (P<0.05).Conclusion Both of the maxillary protraction combined with modified Nance arch.andmaxillary protraction and rapid palatal expansion were obviously effective for skeletal class III malocclusion in mixed dentition, but maxillary protraction and rapid palatal expansion are much better in protracting subspinales.

  15. 49 CFR 1150.34 - Caption summary-transactions that involve creation of Class III carriers.

    Science.gov (United States)

    2010-10-01

    ... of Class III carriers. 1150.34 Section 1150.34 Transportation Other Regulations Relating to....34 Caption summary—transactions that involve creation of Class III carriers. The caption summary must... representative, address, and telephone number. (6) Cross reference to other class exemptions being used....

  16. Epigenetic influence of KAT6B and HDAC4 in the development of skeletal malocclusion

    Science.gov (United States)

    Huh, Ahrin; Horton, Michael J.; Cuenco, Karen T.; Raoul, Gwenael; Rowlerson, Anthea M.; Ferri, Joel; Sciote, James J.

    2013-01-01

    Introduction Genetic influences on the development of malocclusion include heritable effects on both masticatory muscles and jaw skeletal morphology. Beyond genetic variations, however, the characteristics of muscle and bone are also influenced by epigenetic mechanisms that produce differences in gene expression. We studied 2 enzymes known to change gene expressions through histone modifications, chromatin-modifying histone acetyltransferase KAT6B and deacetylase HDAC4, to determine their associations with musculoskeletal variations in jaw deformation malocclusions. Methods Samples of masseter muscle were obtained from subjects undergoing orthognathic surgery from 6 malocclusion classes based on skeletal sagittal and vertical dysplasia. The muscles were characterized for fiber type properties by immunohistochemistry, and their total RNA was isolated for gene expression studies by microarray analysis and quantitative real-time polymerase chain reaction. Results Gene expressions for fast isoforms of myosins and contractile regulatory proteins and for KAT6B and HDAC4 were severalfold greater in masseter muscles from a patient with a deepbite compared with one with an open bite, and genes related to exercise and activity did not differ substantially. In the total population, expressions of HDAC4 (P = 0.03) and KAT6B (P = 0.004) were significantly greater in subjects with sagittal Class III than in Class II malocclusion, whereas HDAC4 tended to correlate negatively with slow myosin type I and positively with fast myosin gene, especially type IIX. Conclusions These data support other published reports of epigenetic regulation in the determination of skeletal muscle fiber phenotypes and bone growth. Further investigations are needed to elucidate how this regulatory model might apply to musculoskeletal development and malocclusion. PMID:24075665

  17. J钩配合直丝弓技术矫治安氏Ⅱ1错(牙合)%Straight wire appliance combined with J Hook in the treatmant Angle class Ⅱ division Ⅰ malocclusion

    Institute of Scientific and Technical Information of China (English)

    陈斯军; 浦路明; 李青奕; 陈文静

    2011-01-01

    Objective To investigate the treatment of Angle class Ⅱ division Ⅰ malocclusion with straight wire appliance with J hook. Methods Eighteen Angle class Ⅱ division Ⅰ malocclusion patients were treated with straight wire appliance using high pull headgear J hook towing to close the gap left by extraction, and adjust occlusion. X-ray cephaloraetric photoes were taken before and after treatment. Statistical analysis were carried out with the the Kruskal-Wallis test and paired t tests, and the differences were considered significant when P< 0.05. Results All the eighteen patients were finished with class Ⅰ molar teeth relationship, normal over-bite , normal over-jet and amendatory profile. Conclusions Straight wire appliance with high pull headgear J hook is an effective way to control the anchorage, retract the anterior teeth and improve the profile in the treatment of class Ⅱ' malocclusion.%目的 探讨J钩配合直丝弓技术治疗安氏Ⅱ1错(牙合)的临床效果.方法 选取18例安氏Ⅱ1错(牙合)患者,用直丝弓技术配合J钩口外牵引,关闭拔牙间隙,调整咬合关系,并对患者治疗前后X线头颅侧位片进行测量分析.采用SPSS软件配对t检验进行统计分析.结果 18例患者均取得满意疗效,后牙建立中性关系,前牙覆(牙合),覆盖正常,面型明显改善.结论 J钩配合直丝弓技术矫治安氏Ⅱ1错(牙合)是一种行之有效的方法.

  18. 25 CFR 291.13 - When do Class III gaming procedures for an Indian tribe become effective?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false When do Class III gaming procedures for an Indian tribe... ECONOMIC ENTERPRISES CLASS III GAMING PROCEDURES § 291.13 When do Class III gaming procedures for an Indian tribe become effective? Upon approval of Class III gaming procedures for the Indian tribe under...

  19. 25 CFR 291.3 - When may an Indian tribe ask the Secretary to issue Class III gaming procedures?

    Science.gov (United States)

    2010-04-01

    ... INTERIOR ECONOMIC ENTERPRISES CLASS III GAMING PROCEDURES § 291.3 When may an Indian tribe ask the Secretary to issue Class III gaming procedures? An Indian tribe may ask the Secretary to issue Class III... of Class III gaming activities; (b) The State and the Indian tribe failed to negotiate a compact...

  20. 25 CFR 291.14 - How can Class III gaming procedures approved by the Secretary be amended?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false How can Class III gaming procedures approved by the... ECONOMIC ENTERPRISES CLASS III GAMING PROCEDURES § 291.14 How can Class III gaming procedures approved by the Secretary be amended? An Indian tribe may ask the Secretary to amend approved Class III...

  1. Treatment of Class II malocclusion with bialveolar protrusion by means of unusual extractions and anchorage mini-implant

    Directory of Open Access Journals (Sweden)

    Jong-Moon Chae

    2012-10-01

    Full Text Available INTRODUCTION: Patients with dental Class II bialveolar protrusion are generally treated by extracting the four first premolars or two first and two second premolars, and retracting the anterior teeth. This case report describes the treatment of an adult patient with bialveolar protrusion, a Class II canine and molar relationship, and lip protrusion. METHODS: In this patient, the maxillary right second molar (1.7 had to be extracted due to extensive caries. To create sufficient space to retract the anterior teeth, the maxillary right posterior teeth were distalized with a maxillary posterior mini-implant (1.2~1.3 mm in diameter, 10 mm long, which was placed into the maxillary tuberosity area and allowed an en masse retraction of the maxillary anterior teeth. RESULTS: Overall, mini-implant can provide anchorage to produce a good facial profile even without additional premolar extraction in cases of dental Class II bialveolar protrusion with the hopeless second molar. CONCLUSION: The total treatment period was 42 months and the results were acceptable for 34 months after debonding.INTRODUÇÃO: os pacientes com Classe II e biprotrusão alveolar são, geralmente, tratados com extração de quatro primeiros pré-molares ou dois primeiros e dois segundos pré-molares, e retração dos dentes anteriores. Este relato de caso descreve o tratamento de um paciente adulto com biprotrusão alveolar, relação de caninos e de molares em Classe II e protrusão labial. MÉTODOS: nesse paciente, o segundo molar superior direito precisou ser extraído devido a cáries extensas. Para criar espaço suficiente para retração dos dentes anteriores, os dentes posterossuperiores direitos foram distalizados com um mini-implante posterossuperior (1,2 ~ 1,3mm de diâmetro, 10mm de comprimento, que foi colocado na área da tuberosidade maxilar e permitiu uma retração em massa dos dentes anteriores. RESULTADOS: em geral, mini-implantes podem fornecer ancoragem para

  2. A comparison between two lingual orthodontic brackets in terms of speech performance and patients' acceptance in correcting Class II, Division 1 malocclusion: a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Samiha Haj-Younis

    Full Text Available ABSTRACT Objective: To compare speech performance and levels of oral impairment between two types of lingual brackets. Methods: A parallel-group randomized controlled trial was carried out on patients with Class II, Division 1 malocclusion treated at the University of Hama School of Dentistry in Hama, Syria. A total of 46 participants (mean age: 22.3 ± 2.3 years with maxillary dentoalveolar protrusion were randomly distributed into two groups with 23 patients each (1:1 allocation ratio. Either STb (Ormco or 7th Generation (Ormco lingual brackets were applied. Fricative sound/s/ spectrograms were analyzed directly before intervention (T0, one week following premolar extraction prior to bracket placement (T1, within 24 hours of bracket bonding (T2, one month after (T3, and three months after (T4 bracket placement. Patients′ acceptance was assessed by means of standardized questionnaires. Results: After bracket placement, significant deterioration in articulation was recorded at all assessment times in the 7th Generation group, and up to T3 in the STb group. Significant intergroup differences were detected at T2 and T3. No statistically significant differences were found between the two groups in reported tongue irritation levels, whereas chewing difficulty was significantly higher in the 7th Generation group one month after bracket placement. Conclusions: 7th Generation brackets have more interaction with sound production than STb ones. Although patients in both groups complained of some degree of oral impairment, STb appliances appeared to be more comfortable than the 7th Generation ones, particularly within the first month of treatment.

  3. Treatment of class II and class III maloccolusion by using churro jumper: an efficient, inexpensive and uncomplicated fixed flexible functional technique

    OpenAIRE

    Mani, Shubhangi Amit; Mote, Nilesh; Pawar, Kunal Dilip; Mishra, Prashantkumar; Mishra, Richa Anil; Rai, Rajlaxmi Rajaram

    2016-01-01

    Functional orthopedic treatment seeks to improve skeletal and dental relationship of the jaws. The challenging task is to correctly position jaws antero-posteriorly and vertically with correct overbite, overjet and Centric relation. The Churro Jumper is an efficient, inexpensive and uncomplicated fixed flexible functional appliance. It is used to evaluate the efficacy of the Churro Jumper appliance in treatment of skeletal Class II malocclusion with retrognathic mandible. Churro Jumper contri...

  4. Má oclusão de Classe I com biprotrusão e ausência dos primeiros molares inferiores Angle Class I malocclusion with bimaxillary dental protrusion and missing mandibular first molars

    Directory of Open Access Journals (Sweden)

    Aldino Puppin Filho

    2011-12-01

    Full Text Available O presente relato de caso descreve o tratamento ortodôntico de uma paciente de 24 anos de idade, portadora de má oclusão de Classe I de Angle, com protrusão dos incisivos superiores e inferiores, além de perda recente dos primeiros molares inferiores. O tratamento idealizado envolveu a exodontia dos primeiros pré-molares superiores, aliada ao fechamento dos espaços presentes na arcada inferior. O resultado obtido demonstra a necessidade de planos de tratamento individualizados e a importância dos conceitos biomecânicos para movimentar adequadamente os dentes. Esse caso clínico foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria livre escolha, como parte dos requisitos para obtenção do título de Diplomado pelo BBO.This case report describes the orthodontic treatment of a 24-year-old patient presenting with Angle Class I malocclusion, bimaxillary dental protrusion and recent loss of mandibular molars. Treatment involved extraction of the maxillary first premolars and closing of mandibular first molar spaces. Treatment outcomes demonstrate the need for individualized treatment planning and highlight the key role played by biomechanical concepts in achieving proper orthodontic tooth movement. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as representative of the free choice category in partial fulfillment of the requirements for obtaining the BBO Diploma.

  5. Má oclusão de Classe I de Angle, com ausência congênita e impacção de dentes permanentes Angle Class I malocclusion with congenitally absence and impaction of permanent teeth

    Directory of Open Access Journals (Sweden)

    Eduardo Silveira Ferreira

    2009-12-01

    Full Text Available Este artigo relata o tratamento ortodôntico de um paciente com 14 anos e 6 meses de idade, portador de má oclusão de Classe I de Angle, que apresentava ectopia e impacção do dente 45 e ausência congênita do dente 35. O caso foi tratado com extração do dente 45 e fechamento dos espaços inferiores. Documentações inicial, final e pós-tratamento serão apresentadas e discutidas. Esse caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 7, livre escolha, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.This article reports the orthodontic treatment of a 14 year and 6 months old patient that had a Angle Class I malocclusion with an ectopic position and impaction of the tooth 45 and congenitally absence of tooth 35. This case was treated with the extraction of the tooth 45 and space closure in the lower arch. Initial, final and post-treatment orthodontic records will be presented and discussed. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO, representing the category 7, free choice, as part of the requirements for achieving the title of BBO diplomate.

  6. 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.

  7. Treatment of Class II Division 2 Malocclusion Using the Forsus Fatigue Resistance Device and 5-Year Follow-Up

    Directory of Open Access Journals (Sweden)

    Ezgi Atik

    2016-01-01

    Full Text Available This case report presents the treatment of a 14-year-and-8-month-old boy with Class II division 2 mandibular retrusion, severe deep bite, and concave profile. The Forsus fatigue resistance device (FRD was effective in correcting both skeletal and dental parameters. At 5-year posttreatment follow-up, the teeth were well aligned and the occlusion was stable. FRD application with appropriate treatment time can result with prominent changes in the facial profile and dentition, and the outcomes can be maintained at the long-term follow-up periods.

  8. 拔除智齿矫治成人Ⅲ类骨性错(牙合)1例%Treatment for adult skeletal classmalocclusion by the extraction of the 4 third molars: A case report

    Institute of Scientific and Technical Information of China (English)

    郭丛丛; 包柏成

    2012-01-01

    通过拔除第三磨牙,利用第二磨牙远中与上颌结节后缘/下领升支前缘之间的剩余间隙,最终解除了上牙弓的Ⅱ度拥挤及上下牙弓矢状关系的不调.%By extraction of the 4 third molars, the spaces from the posterior dental arch were available to relieve moderate maxillary crowding and correct Class HI malocclusion, effective treatment was carried out in 1 ease.

  9. 上颌前牵引矫治安氏Ⅲ类骨性错(牙合)患者的头影测量分析%Cephalometric analysis for Angle's classmalocclusion patient with maxillary front traction

    Institute of Scientific and Technical Information of China (English)

    卢红飞; 麦志辉; 艾虹; 陈奇

    2009-01-01

    目的 探讨上颌前牵引矫治安氏Ⅲ类骨性错(牙合)青少年病例,并分析其前后硬组织的变化.方法 选择20例采用上颌前牵引方法矫治的安氏Ⅲ类骨性错(牙合)青少年病例为实验组,20例安氏Ⅰ类骨性青少年病例为对照组,对矫治前后的侧位片进行X线头影测量分析.结果 实验组与对照组相比,矫治前后上颌长度平均增加3.68 mm、上颌窦前后径平均增加2.38 mm、上颌窦前壁厚度平均增加2.11 mm(P0.05).结论 应用上颌前牵引矫治安氏Ⅲ类骨性错殆青少年病例,可获得较大的侧貌改善.%Objectives To study the changes of hard tissue before and after orthodontic treatment for Angle's classmalocclusion adolescence patient with maxillary front traction. Methods 20 cases of Angle's classmalocclusion adolescence patients were treated by front traction in maxilla, while there were 20 cases of Angle's classmalocclusion adolescence patients as the control group. Cephalometric a-nalysis was carried out before and after the treatment. Data were analyzed by SPSS11.0 system using paired t-test. Results There were significant increases in the length, anteroposterior diameter and thick-ness of maxillary sinus (P0.05). Conclusions It is a effective approach to change the hard tissue after ortho-dontic treatment for Angle's classmalocclusion adolescence patient with front traction in maxillary area.

  10. 安氏Ⅲ类错(牙合)畸形患者翼外肌MRI研究%Magnetic resonance imaging assessment of the lateral pterygoid muscle in Classmalocclusion subjects

    Institute of Scientific and Technical Information of China (English)

    刘月华; 杨晓江; 高晓辉; 李湲

    2012-01-01

    Objective To analyze the relationship between Classmalocclusion and pathological changes in temporomandibular joint (TMJ) structures using magnetic resenonce imaging (MRI).Methods Twenty-four Classmalocclusion adult patients and 10 normal control cases were included in the study.The characteristics of lateral pertygoid muscle ( LPM ) in the sample group and the control group were assessed.Results More pathological changes of LPM were found in Classmalocclusion adult patients (36 TMJ).The changes included hypertrophy,atrophy and contracture.And there was no relation between the pathological changes of LPM and the symptom of temporomandibular disorders (TMD). Conclusions The frequency of pathological changes of LPM was greater in patients with Classmalocclusion than in the control group.%目的 通过MRI观察安氏Ⅲ类错(牙合)畸形患者翼外肌结构,探讨Ⅲ类错(牙合)畸形导致颞下颌关节紊乱病的潜在危险性.方法利用MRI对24例安氏Ⅲ类错(牙合)畸形患者(Ⅲ类错(牙合)组)和10名健康对照者(健康对照组)进行翼外肌成像研究.观察两组翼外肌病理结构及Ⅲ类错(牙合)组病理结构与颞下颌关节紊乱病体征的关系.结果Ⅲ类错(牙合)组翼外肌存在肌肉肥大、挛缩和萎缩等病理改变(36侧),并与健康对照组翼外肌病理改变(2侧)的差异有统计学意义(P<0.01).安氏Ⅲ类错(牙合)畸形患者有翼外肌的病理改变,但多不伴颞下颌关节紊乱病的临床症状.结论安氏Ⅲ类错(牙合)畸形比正常(牙合)可更多地引起翼外肌的病理改变,有发生颞下颌关节紊乱病的潜在危险.

  11. Assessment of divine proportion in the cranial structure of individuals with Angle Class II malocclusion on lateral cephalograms

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    Marcos André dos Santos da Silva

    2012-06-01

    Full Text Available INTRODUCTION: The study of the Divine Proportion (Φ = 1.618 began with the Greeks, having as main researchers the mathematician Pythagoras and the sculptor Phidias. In Dentistry, Ricketts (1981-82 was an early to study this issue. OBJECTIVE: This study proposed to evaluate how some cephalometric measures are presented in relation to the Divine Proportion, with the total of 52 proportions, formed by 28 cephalometric landmarks. METHODS: Lateral cephalograms of 40 Class II adults patients aging from 17 to 45 years (13 male and 27 female were evaluated. The linear distances between the landmarks were measured using Radiocef Studio software. RESULTS: After statistical analysis, the data shown an average of 65,48% in the Divine Proportion, 17,5% in the relation Ans-Op/V1S-DM16 and 97,5% in the relations Na-Me/Na-PoNa e Na-PoNa/Na-Gn. CONCLUSION: Among all cephalometric measurements investigated, the lower facial third and the dental arches showed the smallest percentages of Divine Proportion.

  12. 40 CFR 147.753 - Existing Class I and III wells authorized by rule.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Existing Class I and III wells authorized by rule. 147.753 Section 147.753 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... PROGRAMS Indiana § 147.753 Existing Class I and III wells authorized by rule. Maximum injection...

  13. 40 CFR 147.3014 - Construction requirements for Class III wells.

    Science.gov (United States)

    2010-07-01

    ... requirements for Class III wells. (a) In addition to the requirements of § 146.32(c)(3) of this chapter... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Construction requirements for Class III wells. 147.3014 Section 147.3014 Protection of Environment ENVIRONMENTAL PROTECTION...

  14. 40 CFR 147.3015 - Information to be considered for Class III wells.

    Science.gov (United States)

    2010-07-01

    ... be considered for Class III wells. (a) In addition to the requirements of § 146.34(a) of this chapter... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Information to be considered for Class III wells. 147.3015 Section 147.3015 Protection of Environment ENVIRONMENTAL PROTECTION...

  15. Efeitos do aparelho Jasper Jumper no tratamento da má oclusão de Classe II Effects of the Jasper Jumper appliance in the treatment of Class II malocclusion

    Directory of Open Access Journals (Sweden)

    Rafael Pinelli Henriques

    2009-12-01

    Full Text Available OBJETIVO: o objetivo deste estudo foi avaliar os efeitos esqueléticos e dentoalveolares do tratamento de pacientes com má oclusão de Classe II com o aparelho Jasper Jumper associado ao aparelho ortodôntico fixo, comparados a um grupo controle não-tratado. MÉTODOS: a amostra foi constituída por 47 indivíduos, divididos em dois grupos: Grupo 1, contendo 25 pacientes com idade média de 12,72 anos, tratados com o aparelho Jasper Jumper por um tempo médio de 2,15 anos; Grupo 2 (controle, composto por 22 indivíduos com idade média de 12,67 anos, não-submetidos a tratamento ortodôntico e com má oclusão de Classe II, observados por um período médio de 2,12 anos. Foram avaliadas as telerradiografias ao início e ao final do tratamento ortodôntico para o Grupo 1 e do período de observação para o Grupo 2. As variáveis cefalométricas iniciais, finais e as alterações com o tratamento foram comparadas entre os grupos por meio do teste t independente. RESULTADOS: em comparação ao grupo controle, o grupo Jasper Jumper apresentou maior restrição do deslocamento anterior da maxila e maior retrusão maxilar, melhora da relação maxilomandibular, diminuição da convexidade facial, maior protrusão e intrusão dos incisivos inferiores e maior extrusão dos molares inferiores, além de maior diminuição dos trespasses horizontal e vertical e maior melhora da relação molar. CONCLUSÃO: a correção da Classe II no grupo tratado com o Jasper Jumper e aparelhagem fixa se deu principalmente devido à restrição do crescimento maxilar, protrusão e intrusão dos incisivos inferiores e extrusão dos molares inferiores.AIM: The aim of this study was to evaluate the skeletal and dentoalveolar effects of the Class II malocclusion treatment with the Jasper Jumper appliance associated with fixed orthodontic appliances, compared to an untreated control group. METHODS: The sample comprised 47 subjects, divided into two groups: Group 1, with 25

  16. Changes of the upper lip in orthodontic and orthopedic treatment of angle′s class II malocclusion

    Directory of Open Access Journals (Sweden)

    Luiz Renato Paranhos

    2013-01-01

    Full Text Available Aims: This study aimed to evaluate the changes in upper lips due to incisors retraction in Class II Division 1 patients treated with mandibular protraction, fixed appliances, and without extraction. Materials and Methods: The sample consisted of 64 pre- and post-treatment lateral cephalometric X-rays of 32 patients with 9-12 years old (16 men and 16 women, who presented ANB > 4 o , overjet ≥ 4 mm, treated with Balter′s Bionator and fixed appliances. The average period between initial and final radiographies was 5 years (maximum of 5.5 years and minimum of 4.5 years. Statistical Analysis Used: A Student′s t-test (P < 0.01 evaluated the statistical significance of differences between the mean values obtained for pre- and post-treatment in each variable, for males and females. Linear regression analysis for hard-tissue variables in relation to soft-tissue variables were also made for correlation. Results: The male group presented cervical point with r = 0.40 and incisal point with r = 0.42. Female subjects showed incisor cervical point with r = 0.86 and incisal point r = 0.74. The average Ls retraction was 0.55 mm in 2.43 mm of incisal point movement and 0.34 mm of cervical point. The nasolabial angle showed increase average of 2° for men and 3.9° for women. Conclusion: There is a difference between genders regarding the lip-incisor relation at this age. Males presented thickening of soft tissue and week correlation between the movement of the incisor and soft tissue both cervical and incisal point. In females′ subjects, a strong correlation between the retraction movement and soft tissue, both cervical and incisal point.

  17. The Oropharyngeal Airway in Young Adults with Skeletal Class II and Class III Deformities: A 3-D Morphometric Analysis.

    Directory of Open Access Journals (Sweden)

    Yasas Shri Nalaka Jayaratne

    Full Text Available 1 To determine the accuracy and reliability of an automated anthropometric measurement software for the oropharyngeal airway and 2 To compare the anthropometric dimensions of the oropharyngeal airway in skeletal class II and III deformity patients.Cone-beam CT (CBCT scans of 62 patients with skeletal class II or III deformities were used for this study. Volumetric, linear and surface area measurements retroglossal (RG and retropalatal (RP compartments of the oropharyngeal airway was measured with the 3dMDVultus software. Accuracy of automated anthropometric pharyngeal airway measurements was assessed using an airway phantom.The software was found to be reasonably accurate for measuring dimensions of air passages. The total oropharyngeal volume was significantly greater in the skeletal class III deformity group (16.7 ± 9.04 mm3 compared with class II subjects (11.87 ± 4.01 mm3. The average surface area of both the RG and RP compartments were significantly larger in the class III deformity group. The most constricted area in the RG and RP airway was significantly larger in individuals with skeletal class III deformity. The anterior-posterior (AP length of this constriction was significantly greater in skeletal class III individuals in both compartments, whereas the width of the constriction was not significantly different between the two groups in both compartments. The RP compartment was larger but less uniform than the RG compartment in both skeletal deformities.Significant differences were observed in morphological characteristics of the oropharyngeal airway in individuals with skeletal class II and III deformities. This information may be valuable for surgeons in orthognathic treatment planning, especially for mandibular setback surgery that might compromise the oropharyngeal patency.

  18. The biowaiver extension for BCS class III drugs: the effect of dissolution rate on the bioequivalence of BCS class III immediate-release drugs predicted by computer simulation.

    Science.gov (United States)

    Tsume, Yasuhiro; Amidon, Gordon L

    2010-08-02

    The Biopharmaceutical Classification System (BCS) guidance issued by the FDA allows waivers for in vivo bioavailability and bioequivalence studies for immediate-release (IR) solid oral dosage forms only for BCS class I drugs. However, a number of drugs within BCS class III have been proposed to be eligible for biowaivers. The World Health Organization (WHO) has shortened the requisite dissolution time of BCS class III drugs on their Essential Medicine List (EML) from 30 to 15 min for extended biowaivers; however, the impact of the shorter dissolution time on AUC(0-inf) and C(max) is unknown. The objectives of this investigation were to assess the ability of gastrointestinal simulation software to predict the oral absorption of the BCS class I drugs propranolol and metoprolol and the BCS class III drugs cimetidine, atenolol, and amoxicillin, and to perform in silico bioequivalence studies to assess the feasibility of extending biowaivers to BCS class III drugs. The drug absorption from the gastrointestinal tract was predicted using physicochemical and pharmacokinetic properties of test drugs provided by GastroPlus (version 6.0). Virtual trials with a 200 mL dose volume at different drug release rates (T(85%) = 15 to 180 min) were performed to predict the oral absorption (C(max) and AUC(0-inf)) of the above drugs. Both BCS class I drugs satisfied bioequivalence with regard to the release rates up to 120 min. The results with BCS class III drugs demonstrated bioequivalence using the prolonged release rate, T(85%) = 45 or 60 min, indicating that the dissolution standard for bioequivalence is dependent on the intestinal membrane permeability and permeability profile throughout the gastrointestinal tract. The results of GastroPlus simulations indicate that the dissolution rate of BCS class III drugs could be prolonged to the point where dissolution, rather than permeability, would control the overall absorption. For BCS class III drugs with intestinal absorption patterns

  19. Expression of a cucumber class III chitinase and Nicotiana plumbaginifolia class I glucanase genes in transgenic potato plants

    NARCIS (Netherlands)

    Moravcikova, J.; Matusikova, I.; Libantova, J.; Bauer, M.; Mlynarova, L.

    2004-01-01

    The genes encoding for a cucumber class III chitinase and Nicotiana plumbaginifolia class I glucanase were co-introduced into Slovak potato (Solanum tuberosum L.) breeding line 116/86 using Agrobacterium tumefaciens. For both transgenes the number of integrated copies and level of RNA expression wer

  20. Evolution and comparative analysis of the MHC Class III inflammatory region

    OpenAIRE

    Speed Terence P; Sims Sarah; Palmer Sophie; Coggill Penny; Cross Joseph GR; Belov Katherine; Papenfuss Anthony T; Deakin Janine E; Beck Stephan; Graves Jennifer

    2006-01-01

    Abstract Background The Major Histocompatibility Complex (MHC) is essential for immune function. Historically, it has been subdivided into three regions (Class I, II, and III), but a cluster of functionally related genes within the Class III region has also been referred to as the Class IV region or "inflammatory region". This group of genes is involved in the inflammatory response, and includes members of the tumour necrosis family. Here we report the sequencing, annotation and comparative a...

  1. 正畸治疗对安氏Ⅲ类错患者牙弓宽度的影响%Effects on Arch Width among Angle ClassMalocclusion after Orthodontic Treatment

    Institute of Scientific and Technical Information of China (English)

    林晨

    2012-01-01

      目的研究正畸治疗对安氏Ⅲ类错患者牙弓宽度的影响.方法选择45例安氏Ⅲ类错的患者,其中21例采用拔牙矫治,24例采用不拔牙矫治,测量治疗前后的牙模型,分别记录牙弓前、后段的宽度,比较不同矫治方法对牙弓宽度变化的影响.结果两组治疗后上颌牙弓前段宽度均变大(P 0.05).结论拔牙矫治不会导致牙弓宽度的减小,从而影响美观.%  Objective To study the effects on arch width among Angle classmalocclusion after extraction and nonextraction orthodontic treatment. Methods Choose 45 Angle classmalocclusion cases (21 cases with extraction of 4 bicuspids and 24 nonextraction cases), the intercanine width and intermolar width between the 2 groups were compared. Results After treatment, the intercanine width on the maxillary of two groups increased significantly (P0.05).Conclusion Extraction treatment does not result in narrower arch widths and unesthetic faces.

  2. 微种植体支抗在安氏Ⅱ类1分类错牙合中的应用%The Application of Micro-implants Anchorage in Angle Class Ⅱ Division 1 Malocclusion

    Institute of Scientific and Technical Information of China (English)

    王铭蔚

    2012-01-01

    Angle class Ⅱ division 1 malocclusion prevalence is high. The premise of such disease to be successfully treated is the perfect anchorage control. Mini-implants anchorage provides stable anchorage effects for the orthodontic treatment, which is recognized and accepted by the majority of physicians. In practical application process, how to optimize the use of micro-implants to treatment of Angle class Ⅱ division 1 malocclusion is one of the difficulties in orthodontic.%安氏Ⅱ类1分类错牙合畸形患病率较高,正确的支抗设计和良好的支抗控制是这类错牙合获得成功矫治的前提.近年来,微种植体支抗由于为正畸治疗中提供稳定支抗效果而逐渐被广大医师认识和接受.在实际应用过程中,如何优化使用微种植体治疗安氏Ⅱ类1分类错牙合是当今正畸治疗的难点之一.

  3. Twin block 矫治器矫治恒牙初期Ⅱ类错牙合的研究%Treatment of classmalocclusion with Twin block appliance

    Institute of Scientific and Technical Information of China (English)

    张漫; 程祥荣; 彭友俭

    2001-01-01

    目的:观察Twin block 矫治器矫治恒牙初期安氏Ⅱ类错牙合的效果。方法:在临床随机选择20 名安氏Ⅱ类错牙合用Twin block 矫治器进行矫治,以X 线头影测量分析法评价疗效。结果:Twin block 矫治器可促进下颌生长;同时引起上切牙舌倾,下切牙唇倾。结论:Twin block 矫治器可产生明显的生长改良效果。%Objective:To evaluate the effect of of twin block appliance in the early treatment of classmalocclusion.Methods:20 cases with classmalocclusion were treated with Twin block appliance.Cephalometric analysis was used to evaluate the effects.Results:The twin block appliance could stimulate the growth of mandible and lead to retrocline of the upper incisors and procline of the lower incisors.Conclusion:The twin block appliance can achieve remarkable effects of growth modification of dentognathic system.

  4. A Medical School, 300 Students Unilateral Mastication and the Class Malocclusion System Correlation Research%某医学院300名学生偏侧咀嚼与安氏错颌系统相关性调查研究

    Institute of Scientific and Technical Information of China (English)

    周培锋; 柳海; 刁鹏飞; 巩晓亮; 李忠进; 张挺

    2014-01-01

    目的:采用一定统计学方法调查某医学院学生偏侧咀嚼和在安氏错颌分类系统下错颌的发生率,进而分析这两者之间的相关性。方法:通过对300名芜湖皖南医学:在校生进行偏侧咀嚼筛查,标准口腔检查,口腔相关问卷调查,继而对偏侧咀嚼以及安氏错颌分类系统相关性进行分析。结果:根据统计学结果分析,有偏侧咀嚼的学生占调查总数的58.00%,在安氏错颌分类系统(包括安氏错颌分类系统Ⅰ,Ⅱ和Ⅲ类)下有错颌的学生占调查总数的41.00%,同时有偏侧咀嚼和错颌的学生占调查总数的20.00%;有错颌的学生偏侧咀嚼的发生率明显比没有错颌的学生高;并且偏侧咀嚼与安氏错颌分类系统相关性之间有统计学意义(在0.01水平上显著相关,具有统计学上的意义)。结论:偏侧咀嚼和安氏错颌分类系统具有某种相关性,这次调查中皖南医学院的学生具有在安氏错颌分类系统下错颌的偏侧咀嚼发生率较没有错颌的学生高。因此,在防治偏侧咀嚼中,对治疗安氏错颌分类系统下的错颌需要引起高度重视。%Objective:The purpose is to investigate incidence of unilateral mastication and the class malocclusion system, and to analyze the relationship between unilateral mastication and the class malocclusion system.Methods:By means of unilateral mastication examination,standard dental detection and questionnaire survey in students (300) among Wannan Medical College in Wuhu,then analyzing unilateral mastication and the class malocclusion system correlation.ResultsAccording to the statistics,students with unilateral mastication had a 58.0%,students with the class malocclusion (including the class malocclusionⅠ, IIand Ⅲ) had a 41.0%,students with both unilateral mastication and the class malocclusion had a 20.0%;students have the class malocclusion unilateral mastication prevalence Which was obviously higher than that is no

  5. Transdisciplinary treatment of Class III malocclusion using conventional implant-supported anchorage: 10-year posttreatment follow-up

    Directory of Open Access Journals (Sweden)

    Mariana Roennau Lemos Rinaldi

    2015-06-01

    Full Text Available INTRODUCTION: Combined treatment offers advantages for partially edentulous patients. Conventional implants, used as orthodontic anchorage, enable previous orthodontic movement, which provides appropriate space gain for crown insertion. OBJECTIVE: This case report describes the treatment of a 61-year and 10-month-old patient with negative overjet which made ideal prosthetic rehabilitation impossible, thereby hindering dental and facial esthetics. CASE REPORT: After a diagnostic setup, conventional implants were placed in the upper arch to anchor intrusion and retract anterior teeth. Space gain for lateral incisors was achieved in the lower arch by means of an orthodontic appliance. CONCLUSIONS: Integrated planning combining Orthodontics and Implantology provided successful treatment by means of conventional implant-supported anchorage. The resulting occlusal relationship proved stable after 10 years.

  6. Civilization III and Whole-Class Play in High School Social Studies

    Science.gov (United States)

    Lee, John K.; Probert, Jeffrey

    2010-01-01

    This study examined an 11th grade high school class as they played the game Civilization III. Over nine class sessions students played the game in support of other activities related to several predetermined and emergent topics in U. S. history. Gameplay was whole-class oriented and involved students taking turns at the computer controlling…

  7. 成人严重骨性Ⅲ类错(牙合)正畸-正颌手术联合矫治临床研究%Study of Orthodontic and Orthognathic Surgical Treatment of severe adult Skeletal ClassMalocclusion

    Institute of Scientific and Technical Information of China (English)

    郑敏谦; 张端强

    2011-01-01

    Objective To study the changes of skeletal and soft tissue after orthodontic and orthognathic surgical treatment in severe adult classmalocclusion. Methods 11 patients with severe skeletal classmalocclusion (male 6, female 5). All the patients were all treated with orthodontic and orthognathic surgery. Lateral cephalometric films taken at the beginning and the end of treatment were analyzed using traditional cephalometric anlaysis. Paired t-test was performed to evaluate the significant treatment change. Results ANB angle was obviously increased(P<0.05) and class Ⅰ facial form was attained. N'-Sn-Pos angle was increased 7.60°(P<0.05) , while S-N'-Si and S-N'-Pos angle were discreased(P<0.05). Soft tissue profile was improved dramatically. Conclusion Severe adult classmalocclusion treated with orthodontic and orthognathic surgery could achieved class Ⅰ skeletal pattern and soft tissue profile could be dramatically improved.%目的 探讨成人严重骨性Ⅲ类牙颌畸形经正畸-正颌手术联合矫治后颌面软硬组织的变化情况.方法 骨性Ⅲ类牙颌畸形病例11例,其中男性6例,女性5例,采用正畸-正颌手术联合矫治.治疗前后拍摄头影测量片,用常规头影测量分析方法进行分析.采用配对t检验分析治疗前后软硬组织测量项目的统计学差异.结果 治疗后ANB角显著增加(P<0.05),达到Ⅰ类骨面型;面凸角N'-Sn-Pos平均增大为7.60°(P<0.05);S-N'-Si角与S-N'-Pos角显著减少(P<0.05).结论 骨性Ⅲ类畸形通过正畸-正颌手术联合治疗达到颌骨的Ⅰ类关系,面部软组织侧貌得到明显改善.

  8. Perawatan Maloklusi Pseudo Kelas III dengan Alat Ortodontik Cekat Teknik Begg

    Directory of Open Access Journals (Sweden)

    Robertus Meidiyanto

    2016-10-01

    Full Text Available Latar Belakang: Maloklusi Pseudo kelas III ditandai dengan hubungan yang tidak harmonis antara relasi anteroposterior rahang dan posisi mandibula terhadap maksila. Ketidakharmonisan tersebut dapat disebabkan karena mandibula yang normal dengan maksila retrusif. Maloklusi pseudo kelas III mempunyai perhitungan yang menunjukkan bentuk antara klas I dan skeletal klas III. Perbedaanya hanya pada sudut gonial dimana pada skeletal klas III sudutnya lebih tumpul, sedangkan pada sampel pseudo klas III, sudut gonial lebih mirip dengan klas I. Perawatan ortodontik dengan alat cekat teknik Begg dapat juga untuk merawat maloklusi Angle kelas III, termasuk maloklusi skeletal yang menyertainya. Tujuan: memaparkan perubahan dental dan skeletal setelah perawatan dengan alat cekat teknik Begg. Kasus: perempuan 20 tahun mengeluhkan gigi-gigi rahang atas ada yang tumbuh di belakang dan rahang bawah nyakil sehingga menganggu penampilan dan mengurangi rasa percaya diri. Diagnosis: Maloklusi Angle Klas III subdivisi serta hubungan skeletal klas III dengan maksila retrusif dan mandibula protusif disertai Crossbite: 12, 11, 21, 22 terhadap 34, 32,31, 41, 42, 43. Perawatan: menggunakan alat cekat teknik Begg tanpa pencabutan. Kesimpulan: Hasil menunjukkan crowded terkoreksi, overjet dan overbite terkoreksi, relasi molar menjadi klas I.   Background: Pseudo class III malocclusion characterized by disharmony between anteroposterior relationship of jaw and mandibulae position toward maxilla. This disharmony cause by normally shaped mandibles and underveloped maxillae. Pseudo clas III malocclusion is an intermediate form between class I and skeletal clas III malocclusion. The only exception was the gonial angle, which was generally more obtuse in the skeletal class III sample. Measurement of gonial angle in the pseudo class III sample was found to be rather similar to class I sample. Fixed Begg orthodontic appliance can be used to treat Angle’s class III malocclusion

  9. SmartClip自锁托槽矫治器双颌减数治疗安氏Ⅲ类错(牙合)的临床研究%Clinical study of SmartClip(TM) Self-Ligating Appliance applied in Angle classmalocclusion with extraction treatment

    Institute of Scientific and Technical Information of China (English)

    安晶涛; 王天祥; 孙婷婷; 宋玉玲; 王锐; 高睿

    2012-01-01

    目的:评价SmartClip自锁托槽矫治器双颌减数治疗安氏Ⅲ类错(牙合)的临床疗效,并探讨其机制和使用方法.方法:临床选择13~ 21岁安氏Ⅲ类错(牙合)患者26例,应用SmartClip自锁托槽矫治器进行减数治疗,并对治疗前后X线头影测量值的变化进行分析.结果:矢状方向上,SNA和ANB分别增加1.41°和1.33°,差异均具有统计学意义(P<0.05),而SNB的变化无显著性(P>0.05).同时,U1-NA和U1-SN分别增加4.60°和10.78°,U1-NA(mm)增加2.60mm,L1.NB和L1-MP分别减小5.88°和6.09°,L1-NB (mm)减小2.18mm,以上差异均具有统计学意义(P<0.05).垂直方向上,SN-MP和Y轴的变化均无显著性(P>0.05).结论:应用SmartClip自锁托槽矫治器减数治疗安氏Ⅲ类错(牙合)可取得令人满意的临床效果.%Objective To evaluate the effects of SmartClipTM Self-Ligating Appliance applied in Angle class III malocclusion with bimaxiliary extraction treatment and discuss the mechanism and application. Methods 26 cases aged 13-21 years old with Angle class III malocclusion were chosen and treated with SmartClipTM Self-Ligating Appliance.Cephalomethc analysis was performed before and after the treatment. Results In the sagittal direction,SNA and ANB were increased 1.41° and 1.33°.there were significant differences in these changes (P0.05). U1-NA and U1-SN were increased 4.60° and 10.78°,U1-NA (mm) were increased 2.60mm,L1-NB and L1-MP were reduced 5.88° and 6.09°,L1-NB(mm) were reduced 2.18mm,there were significant differences in these changes (P0.05), Conclusion SmartClipTM Self-Ligating Appliance is effective for Angle class III malocclusion with extraction treatment.

  10. Increased expression of class III β-tubulin in castration-resistant human prostate cancer

    OpenAIRE

    Terry, S; Ploussard, G.; Allory, Y; Nicolaiew, N; Boissière-Michot, F; Maillé, P; Kheuang, L; Coppolani, E; Ali, A.; Bibeau, F; Culine, S; Buttyan, R; de la Taille, A; Vacherot, F

    2009-01-01

    Background: Class III β-tubulin (βIII-tubulin) is expressed in tissues of neuronal lineage and also in several human malignancies, including non-small-cell lung carcinoma, breast and ovarian cancer. Overexpression of βIII-tubulin in these tumours is associated with an unfavourable outcome and resistance to taxane-based therapies. At present, βIII-tubulin expression remains largely uncharacterised in prostate cancer. Methods: In this report, we evaluated the expression of βIII-tubulin in 138 d...

  11. 反式 Twin -block 治疗替牙期安氏Ⅲ类错牙合疗效研究%Research on curative effect of reverse Twin-block appliance in treatment of mixed dentition period of classmalocclusion

    Institute of Scientific and Technical Information of China (English)

    何艳; 谭燕; 张清磊; 陈畅

    2014-01-01

    目的:评价应用反式 Twin -block 治疗替牙期安氏Ⅲ类错牙合的临床疗效。方法应用反式 Twin -block 矫治器治疗替牙期安氏Ⅲ类错牙合11例,并对治疗前后的头影测量结果进行分析。结果11例替牙期安氏Ⅲ类错牙合患者侧貌改善,前牙覆牙合覆盖正常。结论反式 Twin -block 矫治器能有效治疗替牙期安氏Ⅲ类错牙合。%Objective To evaluate the clinical effects of application of reverse Twin-block in treating mixed dentition of Angle classmalocclusion.Methods Reverse Twin-block appliance was applied in the treatment of mixed dentition period of classmalocclusion in 1 1 cases,and cephalomertric analysis was performed before and after treatment.Results The profiles of 1 1 patients of mixed denti-tion period of classmalocclusion have improved,and their anterior teeth overbite and overjet became normal.Conclusions Reverse Twin-block appliance is effective in the treatment of mixed dentition period of classmalocclusion.

  12. 49 CFR 1150.33 - Information to be contained in notice-transactions that involve creation of Class III carriers.

    Science.gov (United States)

    2010-10-01

    ... that involve creation of Class III carriers. 1150.33 Section 1150.33 Transportation Other Regulations.... 10901 § 1150.33 Information to be contained in notice—transactions that involve creation of Class III... exceed those that would qualify it as a Class III carrier. (h) Transactions imposing...

  13. 76 FR 71600 - Renewal of Agency Information Collection for Class III Tribal-State Gaming Compact Process...

    Science.gov (United States)

    2011-11-18

    ... Bureau of Indian Affairs Renewal of Agency Information Collection for Class III Tribal- State Gaming... collection of information for the Class III Tribal State Gaming Compact Process. The information collection... renewal of the approval for the information collection conducted under 25 CFR 293, Class III Tribal...

  14. 25 CFR 291.12 - Who will monitor and enforce tribal compliance with the Class III gaming procedures?

    Science.gov (United States)

    2010-04-01

    ... Class III gaming procedures? 291.12 Section 291.12 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR ECONOMIC ENTERPRISES CLASS III GAMING PROCEDURES § 291.12 Who will monitor and enforce tribal compliance with the Class III gaming procedures? The Indian tribe and the State may have an...

  15. 40 CFR 147.51 - State-administered program-Class I, III, IV, and V wells.

    Science.gov (United States)

    2010-07-01

    ... PROGRAMS Alabama § 147.51 State-administered program—Class I, III, IV, and V wells. The UIC program for Class I, III, IV and V wells in the State of Alabama, except those on Indian lands, is the program... for Class I, III, IV, and V UIC Program,” September 21, 1982; (3) Letter from Alabama Chief...

  16. Má oclusão Classe I de Angle tratada com extrações de primeiros molares permanentes Angle Class I malocclusion treated with extraction of first permanent molars

    Directory of Open Access Journals (Sweden)

    Ivan Tadeu Pinheiro da Silva

    2010-08-01

    Full Text Available A má oclusão Classe I de Angle é caracterizada por uma relação anteroposterior normal nos molares, que pode ou não estar acompanhada por alterações esqueléticas - nos planos vertical ou transverso - ou dentárias. A biprotrusão, revelada pela inclinação acentuada dos incisivos superiores e inferiores para vestibular, somada ao trespasse horizontal excessivo, faz com que o paciente fique mais exposto a traumas dentários, além de causar comprometimento estético. A escolha dos dentes a serem extraídos para a correção, geralmente, recai sobre os primeiros ou segundos pré-molares, devido à sua posição na arcada. Contudo, a extração do primeiro molar permanente, em função de algum comprometimento, por cárie ou restauração extensa, pode ser uma alternativa, proporcionando a manutenção de um dente hígido em detrimento de outro já manipulado. O presente caso, tratado de maneira incomum, pela extração dos quatro primeiros molares permanentes, 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.Angle Class I malocclusion is characterized by normal anteroposterior molar relationship, which may or may not be accompanied by skeletal changes-in the vertical or transverse planes-or dental changes. Bimaxillary dental protrusion, characterized by pronounced labial inclination of maxillary and mandibular incisors combined with excessive overjet, expose patients to dental trauma and compromise aesthetics. In deciding which teeth to extract for Class I correction the first or second premolars are usually selected due to their location in the dental arch. However, the extraction of a first permanent molar compromised by caries or extensive restoration may be an alternative that ensures the preservation of a healthy tooth instead of one that has already been manipulated. This case, treated in

  17. 肥胖型儿童安氏Ⅱ类错牙合畸形的相关因素调查%Angel class II malocclusion deformity in obese children and related factors

    Institute of Scientific and Technical Information of China (English)

    程尧; 贾莹

    2016-01-01

    目的:观察肥胖型儿童骨密度的变化、上气道形态的改变及了解肥胖型儿童饮食、睡眠和口腔疾病既往史。研究肥胖与安氏Ⅱ类错牙合畸形发生的相关性。方法对895例11和12岁儿童进行体重指数(BMI)检查。BMI≥23为肥胖组(=170);在剩余725例BMI<23的儿童中,随机抽取170例作为配对正常组,对两组儿童进行骨密度检查和统计上气道软、硬组织形态的相关参数。并通过问卷调查了解儿童饮食睡眠和口腔疾病既往史。结果肥胖组骨量减少,上气道相对狭窄,口呼吸习惯及牙体早失几率较高。结论肥胖虽然不是安氏Ⅱ类错牙合畸形发生的直接原因,但与安氏Ⅱ类错牙合畸形发生存在间接相关性。%Objective To observe the changes of bone density and morphology of the upper airway in obese children, and understand their diet and sleep situation and past history of oral diseases, so as to inves-tigate the correlation between obesity and Angel class II malocclusion deformity in children. Methods Body mass index (BMI) was examined for 895 children of 11-12 years. The 170 children with BMI ≥ 23 were enrolled into obesity group, 170 children were randomly chosen from the remaining 725 with BMI < 23 into matched normal group. Bone mineral density was determined in both groups, and related parameters of soft and hard tissues in upper respiratory tract were calculated. Questionnaire survey was conducted to understand children's diet, sleep and past history of oral diseases. Results In the obesity group, bone mineral density reduced, upper airway was relatively narrow, the incidence of mouth breathing habit and early tooth loss was relatively high. Conclusions Although obesity does not immediately cause Angel class II malocclusion, it has an indirect correlation with Angel class II malocclusion deformity.

  18. Articulación de fones en individuos clase esqueletal I,II y III Speech patterns in skeletal class I, II and III subjects

    Directory of Open Access Journals (Sweden)

    Pía Villanueva

    2009-09-01

    Full Text Available OBJETIVO: determinar los patrones de articulación de fones consonánticos en sujetos de habla española chilena clases I, II y III esqueletal; comparar las diferencias fonéticas que existan entre clases esqueletales. MÉTODOS: se seleccionaron 54 individuos que cumplían con los criterios de inclusión determinados mediante un examen clínico intraoral y a través del análisis de Ricketts, y se conformaron los grupos de estudio de pacientes clases esqueletales I, II y III. Se les realizó un examen fonoarticulatorio estandarizado para determinar los fones modificados y el patrón articulatorio compensatorio realizado. RESULTADOS: se observaron cambios en el punto de articulación de fones consonánticos en las tres clases esqueletales, con diferencias significativas en los grupos de fones anteriores y medios entre pacientes clases I y II, sólo en el grupo de los fones anteriores entre pacientes I y III. Entre pacientes clases II y III no se observaron diferencias significativas. Se reportan modificaciones y compensaciones cualitativamente distintas entre las clases esqueletales. CONCLUSIONES: en relación a pacientes clase I, los pacientes clase II o III, presentan distinto grado de modificación en el punto de articulación de fones consonánticos. Las diferencias observadas se relacionan con los patrones esqueletales propios de cada clase.PURPOSE: to determine the consonant phonemes articulation patterns in Chilean skeletal class I, II and III Spanish speakers and compare their phonetic differences. METHODS: fifty-four skeletal class I, II and III subjects were selected, based on intraoral clinical examination and Ricketts cephalometric analysis, constituting the study groups. A standardized phonoarticulatory test was applied to each patient to determine the modified phonemes and their compensatory patterns. RESULTS: the findings indicate changes in articulation in all three groups. Significant differences were found in anterior and medium

  19. Assessment of technical documentation of Class III medical devices

    NARCIS (Netherlands)

    Roszek B; de Bruijn ACP; Pot JWGA; van Drongelen AW; BMT; vgc

    2010-01-01

    Europese regelgeving vereist dat fabrikanten van medische hulpmiddelen een dossier opstellen waaruit blijkt dat het hulpmiddel veilig en functioneel is. De kwaliteit van dossiers van de hoogste risicoklasse medische hulpmiddelen, klasse III, laat evenwel te wensen over. Dit blijkt uit onderzoek va

  20. FRIII矫治功能性Ⅲ类错(牙合)畸形的颌面分析%Cephalometric changes after the treatment of pseudo Class III using the Frankel III appliance

    Institute of Scientific and Technical Information of China (English)

    叶金梅; 王洪涛; 邓利琴; 陈柯; 张栋杰; 李新桂

    2012-01-01

    Objective The purpose of this study was to evaluate the changes of dentoskeletal and soft tissue profile produced by the Frankel III appliance in growing children with pseudo Class 1 malocclusion. Methords Twenty pseudo Class III patients,9males and 11 femalesjn the primary or mixed dentition were selected.The patients presented with a light concave or vertical facial profile.anterior crossbite.Class III molar relationships edge-to-edge incisor relationship.no crowding in upper and lower anterior teeth. Cephalograms were taken before and after the treatment. Results Cephalometric evaluation revealed a significant decrease in SNB angle.lMPA angle and an increase greatly in ANB angle.lower facial height.facial convexity.overjet.Lip structure changed with increasred upper lip convesity and decreased lower lip convesity.the lower lip decrease significantly. Conclusion This treatment showed that significant dentoskeletal and soft tissue changes and the Frankel III appliance is a good way of treating pseudo Class III Malocclusion.%目的:探讨Frankel Ⅲ功能矫治器(Frankel functional regulator Ⅲ appliance,FRIII)矫治功能性Ⅲ类错(牙合)畸形前后颌骨软组织侧貌头影测量值的变化.方法:选择乳牙期、替牙期功能性III类错(牙合)患者20例(男9例,女11例),年龄6~11岁,平均9.8岁,面型为直面型或轻度凹面型,前牙反(牙合),第一磨牙为近中关系,下颌可后退至切对切,上下前牙排列整齐,应用FRIII矫治,治疗前后拍X线头颅侧位定位片并测量数据,采用配对t检验统计学分析.结果:功能性Ⅲ类错(牙合)畸形经FRIII矫治6个月左右,临床上患儿反(牙合)矫正、侧貌发生改变,SNB减小、ANB增加、前下面高增加、IMPA 减小、面凸度增加、覆盖增加有显著性差异.唇形改变:上唇突度增大、下唇突度减小,上唇倾斜度减小、下唇倾斜度减小有显著性统计学意义.结论:表明FRIII矫治功能性Ⅲ类

  1. Regulation of MIR165/166 by class II and class III homeodomain leucine zipper proteins establishes leaf polarity

    DEFF Research Database (Denmark)

    Merelo, Paz; Ram, Hathi; Caggiano, Monica Pia

    2016-01-01

    A defining feature of plant leaves is their flattened shape. This shape depends on an antagonism between the genes that specify adaxial (top) and abaxial (bottom) tissue identity; however, the molecular nature of this antagonism remains poorly understood. Class III homeodomain leucine zipper (HD-...

  2. 基于锥体束CT成像的成人安氏Ⅱ类颅颌面骨性结构分析%Skeletal and dental analysis in Class Ⅱ subdivision malocclusions using cone-beam computed tomography

    Institute of Scientific and Technical Information of China (English)

    夏文倩; 刘翔; 穆锦全; 朱林; 陈文静

    2012-01-01

    目的 通过锥体束CT(cone-beam computed tomography,CBCT)三维成像后研究分析安氏Ⅱ类颅面部的骨性结构特征.方法 对40名成年人患者(对照组安氏Ⅰ类20例,实验组安氏Ⅱ类20例)使用CBCT采集颅面部Dicom数据,使用Dolphin Imaging 11.0对骨组织进行三维重建,选择描述颅面部骨性结构的22个点进行描记,对14个测量值进行分析统计.结果 眶点、髁突顶点、下颌角点的不对称率呈现由上至下变大的趋势,安氏Ⅱ类的上颌磨牙宽度、下颌升支长度以及左右两侧下颌角点距离冠状面的距离相对安氏Ⅰ类有显著性差异(P<0.05);安氏Ⅱ类双侧下颌磨牙距冠状面的距离以及颏点的位置较安氏Ⅰ类有明显统计学差异(P<0.01).结论 CBCT三维成像能有效分析颅面部骨组织的各项特征,本组安氏Ⅱ类患者的颅面部骨组织特征主要为下颌升支发育不足、下颌骨及颏部后缩以及下磨牙的远中移动.%Objective The objective of this study was to analyze the skeletal and dental characteristics of subjects with Class Ⅱ subdivision malocclusions with use of cone-beam computed tomography.Methods Cone-beam computed tomography scans were performed in twenty subjects with Class Ⅱ subdivision malocclusions and twenty subjects with normal occlusions.CT images were constructed into 3D model by using medical image processing software Dolphin Imaging 11.0.Anatomical landmarks were located and reference planes were established on the 3D model. The measurements were analyzed by SPSS 17.0.Results The extent of maxillofacial deformity assessed with points of O,Co and Go increases in adults with facial asymmetry.Several measurements of Class Ⅱ subdivision malocclusions were found to be different with normal occlusions including the width between upper molars,the length of mandibular ramus and the distances between Gonions.Significant differences were observed in measurements of the distances between

  3. Regulation of MIR165/166 by class II and class III homeodomain leucine zipper proteins establishes leaf polarity.

    Science.gov (United States)

    Merelo, Paz; Ram, Hathi; Pia Caggiano, Monica; Ohno, Carolyn; Ott, Felix; Straub, Daniel; Graeff, Moritz; Cho, Seok Keun; Yang, Seong Wook; Wenkel, Stephan; Heisler, Marcus G

    2016-10-18

    A defining feature of plant leaves is their flattened shape. This shape depends on an antagonism between the genes that specify adaxial (top) and abaxial (bottom) tissue identity; however, the molecular nature of this antagonism remains poorly understood. Class III homeodomain leucine zipper (HD-ZIP) transcription factors are key mediators in the regulation of adaxial-abaxial patterning. Their expression is restricted adaxially during early development by the abaxially expressed microRNA (MIR)165/166, yet the mechanism that restricts MIR165/166 expression to abaxial leaf tissues remains unknown. Here, we show that class III and class II HD-ZIP proteins act together to repress MIR165/166 via a conserved cis-element in their promoters. Organ morphology and tissue patterning in plants, therefore, depend on a bidirectional repressive circuit involving a set of miRNAs and its targets.

  4. 上颌前牵引联合快速扩弓矫治儿童骨性Ⅲ类错(牙合)前后软硬组织变化%The orthopedic treatment of skeletal classmalocclusion with maxillary protraction combined with rapid maxillary expansion

    Institute of Scientific and Technical Information of China (English)

    毛新霞; 邹敏; 刘小兰

    2012-01-01

    AIM: To examing the skeletal and soft tissue changes in the correction of skeletal classmalocclusion by maxillary protraction combined with rapid maxillary expansion (RME). METHODS; 28 children of 7 -10 years old with skeletal classmalocclusion were treated with maxillary protraction combined with RME in this study. Before and after treatment, cephalometric radiographs were taken and analyzed. RESULTS; After maxillary protraction, the anterior crossbite were corrected and obvious profile changes were observed. The maxilla moved fore-ward, the length increased but followed with PP-SN plane rotated anticlockwise. The mandible moved backward and downward, the N-Me, ANS-Me/N-Me increased. The upper incisors inclined labially and the lower incisors inclined lingually with the jaw. Profile changes was achieved with FCA, H angle increased. Upper lip moved forward and protrusion increased. Correspondingly lower lip moved backward. CONCLUSION; Maxillary protraction combined with RME is effective in the treatment of Class III malocclusion with maxillary deficiency.%目的:探讨上颌前牵引联合快速扩弓对儿童骨性Ⅲ类错(牙合)的矫治效果.方法:对28例儿童骨性Ⅲ类错(牙合)病人(7 ~10岁)进行上颌前牵引治疗,在前牵引前快速扩弓1周.分别在治疗开始(T0)和结束(T1)时拍摄头颅定位侧位片,进行定点测量分析.结果:①硬组织变化:ANB角增加5.37°(P<0.05),Wit's值增加5.74 mm(P <0.05),Ptm-A增加2.49 mm(P <0.05),Yaxis增加1.82°(P<0.05);SNB角减小0.75°(P>0.05),Go-Me、Co- Gn分别增加0.64 mm、2.21 mm,但P>0.05,SN- PP减小0.61°(P>0.05),PP-MP增加5.54°(P<0.05),下面高、下面高/全面高分别增加3.98(P <0.05)、1.61(P>0.05);U1-NA角增加3.10°(P<0.05),L1 - NB角减小1.23°(P<0.05),Ms6-PP距增加1.13 mm(P <0.05);②软组织测量项目变化:面型角增大5.98°,颏唇角减小2.45°、H角增大5.2°,上唇-E线距增大1.42 mm

  5. Craniofacial analysis of the Tweed Foundation in Angle Class II, division 1 malocclusion Análise craniofacial da Fundação Tweed na maloclusão Classe II, divisão 1 de Angle

    Directory of Open Access Journals (Sweden)

    Paulo César Tukasan

    2005-03-01

    Full Text Available This study has defined the cephalometric values of the Craniofacial Analysis of the Tweed Foundation for a sample of Brazilian subjects. The sample consisted of 211 cephalometric radiographs from subjects aged 12-15, which were divided into two groups: Class II group, with 168 lateral teleradiographs (cephalograms of white Brazilian subjects, with Angle Class II, division 1 malocclusion, of both genders (82 males and 86 females; and the Control Group, with 43 lateral teleradiographs (cephalograms of subjects whose occlusion was clinically excellent, and also of both genders (21 males and 22 females. The teleradiographs were selected from the files of the Department of Orthodontics, School of Dentistry of Piracicaba, State University of Campinas, previously to the orthodontic treatment. The results demonstrated no sexual dimorphism for each group, as attested by the Student's t-test. The exploratory analysis (± 0.5 standard deviation enabled the tolerance limits to be determined and a Craniofacial Analysis Table to be constructed using the respective cephalometric intervals. In addition, the difference between the two groups was not statistically significant according to the maxilla position. The maxilla was in a good position in relation to the cranial base. On the other hand, the mandible was retruded in relation to the cranial base in the Class II cases. The skeletal pattern was not defined because only the Facial Height Index (FHI showed a vertical pattern in Class II subjects, while the Y Axis, SN.PlO, SN.GoMe and FMA values did not show any statistically significant difference between the groups. The Class II division 1 subjects showed lower incisors more labially tipped and a convex facial profile.A pesquisa definiu os valores cefalométricos da Análise Craniofacial da Fundação Tweed em amostra de brasileiros. O estudo constava de 211 telerradiografias tomadas previamente ao tratamento ortodôntico de indivíduos na faixa etária de 12

  6. Glass ionomer cement as an occlusive barrier in Class III furcation defect

    Directory of Open Access Journals (Sweden)

    Rameshwari Singhal

    2011-01-01

    Full Text Available Predicting the prognosis of molars that have experienced furcation invasion, is often a frustrating experience to the dental clinician and disappointing report to the patient involved. Although multiple treatment modalities have been attempted to retain teeth with severe furcation invasion, clinical success has not been predictable. A case report involving the use of glass ionomer cement (GIC as an occlusive barrier in the management of Class III furcation defect involving mandibular first molar is presented. A literature review on the subject matter was conducted using Medline, Google search engines, and manual library search. GIC restoration of Class III furcation invasion gives a satisfactory result. Surgical and nonsurgical treatment options are available for the management of the condition. GIC as an occlusive barrier in Class III furcation invasion is an economical and less invasive treatment option. It also makes home care easy for the patient.

  7. 前牙反(牙合)矫治前后颞下颌关节形态结构改变MRI研究%Effects of Orthodontic Treatment on Temporomandibular Joint of Patients with Adult Functional ClassMalocclusion by MRI

    Institute of Scientific and Technical Information of China (English)

    石勰; 张端强; 许潾于; 严宏

    2012-01-01

    目的 研究成人功能性反(牙合)病例治疗前后颞下颌关节髁突位置、关节盘位置的结构变化,及其与临床症状、体征的相互关系.方法 利用MRI成像分析12例成人反(牙合)病例治疗前后髁突位置和关节盘位置变化,并通过Helkimo指数评价治疗前后颞下颌关节功能.结果 Ⅲ类功能性反(牙合)病例治疗前髁突位于关节窝的前位,治疗后髁突位于关节窝的中位,关节盘位置治疗前后变化无显著差异.关节盘位置正常的病例,关节的临床症状和体征治疗前后无明显变化;关节盘前移位的病例,治疗后主诉症状和临床体征有加重趋势.结论 成人功能性反(牙合)病例通过正畸治疗髁突位于关节窝中位,有利于行使关节的正常功能.%Objective To evaluate the effects of orthodontic treatment on temporomandibular joint morphological changes of patients with adult functional Classmalocclusion and to find out whether these were related to clinic symptoms and signs . Methods 12 patients were examined by MRI before and after treatment to study the changes of the position of condyle and meniscus to evaluate the function of tern -poromandibular joint by Helkimo index . Results Before treatment functional Class Ⅲ patients demonstrated more anteriorly positioned condyles . After treatment functional Class Ⅲ patients demonstreated concentricly positioned condylers , and there is no difference of position of meniscus before and after treat -ment. The patients with normal meniscus position hadnt obvious changes of clinic symptoms and signs . The patients with anterior disc displacement had more severe changes of clinic symptoms and signs . Conclusion Orthodontic treatment induce position of condyle to concentricly positioned and is effective in the treatment of adult functional classmalocclusion .

  8. 40 CFR 147.1250 - State-administered program-Class I, III, IV, and V wells.

    Science.gov (United States)

    2010-07-01

    ... CONTROL PROGRAMS Mississippi § 147.1250 State-administered program—Class I, III, IV, and V wells. The UIC program for Class I, III, IV and V wells in the State of Mississippi, except those on Indian lands, is the... 40 Protection of Environment 22 2010-07-01 2010-07-01 false State-administered program-Class...

  9. 40 CFR 147.200 - State-administered program-Class I, III, IV, and V wells.

    Science.gov (United States)

    2010-07-01

    ... CONTROL PROGRAMS Arkansas § 147.200 State-administered program—Class I, III, IV, and V wells. The UIC program for Class I, III, IV and V wells in the State of Arkansas, except those wells on Indian lands, is... 40 Protection of Environment 22 2010-07-01 2010-07-01 false State-administered program-Class...

  10. 40 CFR 147.500 - State-administered program-Class I, III, IV, and V wells.

    Science.gov (United States)

    2010-07-01

    ... CONTROL PROGRAMS Florida § 147.500 State-administered program—Class I, III, IV, and V wells. The UIC program for Class I, III, IV, and V wells in the State of Florida, except for those on Indian lands is... 40 Protection of Environment 22 2010-07-01 2010-07-01 false State-administered program-Class...

  11. 40 CFR 147.700 - State-administered program-Class I, III, IV, and V wells.

    Science.gov (United States)

    2010-07-01

    ... CONTROL PROGRAMS Illinois § 147.700 State-administered program—Class I, III, IV, and V wells. The UIC program for Class I, III, IV and V wells in the State of Illinois, except those on Indian lands, is the... 40 Protection of Environment 22 2010-07-01 2010-07-01 false State-administered program-Class...

  12. 40 CFR 147.850 - State-administered program-Class I, III, IV and V wells.

    Science.gov (United States)

    2010-07-01

    ... PROGRAMS Kansas § 147.850 State-administered program—Class I, III, IV and V wells. The UIC program for Class I, III, IV and V wells in the State of Kansas, except those on Indian lands as described in § 147... 40 Protection of Environment 22 2010-07-01 2010-07-01 false State-administered program-Class...

  13. The effect of early physiotherapy on the recovery of mandibular function after orthognathic surgery for class III correction. Part II: electromyographic activity of masticatory muscles.

    Science.gov (United States)

    Ko, Ellen Wen-Ching; Teng, Terry Te-Yi; Huang, Chiung Shing; Chen, Yu-Ray

    2015-01-01

    The study was conducted to evaluate the effect of early physical rehabilitation by comparing the differences of surface electromyographic (sEMG) activity in the masseter and anterior temporalis muscles after surgical correction of skeletal class III malocclusion. The prospective study included 63 patients; the experimental groups contained 31 patients who received early systematic physical rehabilitation; the control group (32 patients) did not receive physiotherapy. The amplitude of sEMG in the masticatory muscles reached 72.6-121.3% and 37.5-64.6% of pre-surgical values in the experimental and control groups respectively at 6 weeks after orthognathic surgery (OGS). At 6 months after OGS, the sEMG reached 135.1-233.4% and 89.6-122.5% of pre-surgical values in the experimental and control groups respectively. Most variables in the sEMG examination indicated that recovery of the masticatory muscles in the experimental group was better than the control group as estimated in the early phase (T1 to T2) and the total phase (T1 to T3); there were no significant differences between the mean recovery percentages in the later phase (T2 to T3). Early physical rehabilitative therapy is helpful for early recovery of muscle activity in masticatory muscles after OGS. After termination of physical therapy, no significant difference in recovery was indicated in patients with or without early physiotherapy.

  14. Class III phosphoinositide 3-kinase/VPS34 and dynamin are critical for apical endocytic recycling.

    Science.gov (United States)

    Carpentier, Sarah; N'Kuli, Francisca; Grieco, Giuseppina; Van Der Smissen, Patrick; Janssens, Virginie; Emonard, Hervé; Bilanges, Benoît; Vanhaesebroeck, Bart; Gaide Chevronnay, Héloïse P; Pierreux, Christophe E; Tyteca, Donatienne; Courtoy, Pierre J

    2013-08-01

    Recycling is a limiting step for receptor-mediated endocytosis. We first report three in vitro or in vivo evidences that class III PI3K/VPS34 is the key PI3K isoform regulating apical recycling. A substractive approach, comparing in Opossum Kidney (OK) cells a pan-class I/II/III PI3K inhibitor (LY294002) with a class I/II PI3K inhibitor (ZSTK474), suggested that class III PI3K/VPS34 inhibition induced selective apical endosome swelling and sequestration of the endocytic receptor, megalin/LRP-2, causing surface down-regulation. GFP-(FYVE)x2 overexpression to sequester PI(3)P caused undistinguishable apical endosome swelling. In mouse kidney proximal tubular cells, conditional Vps34 inactivation also led to vacuolation and intracellular megalin redistribution. We next report that removal of LY294002 from LY294002-treated OK cells induced a spectacular burst of recycling tubules and restoration of megalin surface pool. Acute triggering of recycling tubules revealed recruitment of dynamin-GFP and dependence of dynamin-GTPase, guidance directionality by microtubules, and suggested that a microfilamentous net constrained endosomal swelling. We conclude that (i) besides its role in endosome fusion, PI3K-III is essential for endosome fission/recycling; and (ii) besides its role in endocytic entry, dynamin also supports tubulation of recycling endosomes. The unleashing of recycling upon acute reversal of PI3K inhibition may help study its dynamics and associated machineries.

  15. Malocclusion (Misaligned Teeth)

    Science.gov (United States)

    ... Prompt Healthier Eating Scientists Working on Solar-Powered Prosthetic Limbs Health Highlights: March 23, 2017 Fruit Juice for Kids: A Serving a Day OK ALL NEWS > Resources First Aid Videos ... Malocclusion is abnormal alignment of the teeth and the way in which the upper and lower teeth fit together. Normally, the upper teeth overlap ...

  16. Candidate gene analyses of 3-dimensional dentoalveolar phenotypes in subjects with malocclusion

    Science.gov (United States)

    Weaver, Cole A.; Miller, Steven F.; da Fontoura, Clarissa S. G.; Wehby, George L.; Amendt, Brad A.; Holton, Nathan E.; Allareddy, Veeratrishul; Southard, Thomas E.; Moreno Uribe, Lina M.

    2017-01-01

    Introduction Genetic studies of malocclusion etiology have identified 4 deleterious mutations in genes, DUSP6, ARHGAP21, FGF23, and ADAMTS1 in familial Class III cases. Although these variants may have large impacts on Class III phenotypic expression, their low frequency (subjects were digitized with 48 landmarks. The 3-dimensional coordinate data were submitted to a geometric morphometric approach along with principal component analysis to generate continuous phenotypes including symmetric and asymmetric components of dentoalveolar shape variation, fluctuating asymmetry, and size. The subjects were genotyped for 222 single-nucleotide polymorphisms in 82 genes/loci, and phenotpye-genotype associations were tested via multivariate linear regression. Results Principal component analysis of symmetric variation identified 4 components that explained 68% of the total variance and depicted anteroposterior, vertical, and transverse dentoalveolar discrepancies. Suggestive associations (P right discrepancies resulting in midline deviations, unilateral crossbites, and ectopic eruptions. Suggestive associations were found with TBX1 AJUBA, SNAI3 SATB2, TP63, and 1p22.1. Fluctuating asymmetry was associated with BMP3 and LATS1. Associations for SATB2 and BMP3 with asymmetric variations remained significant after the Bonferroni correction (P <0.00022). Suggestive associations were found for centroid size, a proxy for dentoalveolar size variation with 4p16.1 and SNAI1. Conclusions Specific genetic pathways associated with 3-dimensional dentoalveolar phenotypic variation in malocclusions were identified. PMID:28257739

  17. No differences in morphological characteristics between hyperplastic condyle and class III condyle.

    Science.gov (United States)

    Goulart, D R; Muñoz, P; Olate, S; de Moraes, M; Fariña, R

    2015-10-01

    The aim of this research was to compare the condylar morphology of patients with unilateral condylar hyperplasia (UCH) and patients with a class III skeletal relationship using cone beam computed tomography (CBCT). A prospective study was conducted on patients with facial asymmetry attending the division of oral and maxillofacial surgery of the study university in Chile. Fifteen patients with UCH and 15 with a class III skeletal relationship were selected. Linear measurements of the condylar processes were obtained at a scale of 1:1 using the software Ez3D Viewer Plus. Analysis of variance (ANOVA) and the paired t-test were used, considering Pclass III skeletal relationship showed no differences between the right and left sides; the morphology of their condyles was similar to the condyles with hyperplasia and presented statistical differences when compared with the non-hyperplastic condyles (one-way ANOVA, Pclass III skeletal relationship. These findings provide an insight into the possibility of some class III patients presenting bilateral condylar hyperplasia.

  18. Comparative evaluation of slot versus dovetail design in class III composite restorations in primary anterior teeth

    Directory of Open Access Journals (Sweden)

    Arun Rathnam

    2010-01-01

    It was concluded from the results that the both slot and dovetail types of cavity preparations were equally effacious when clinically reviewed for a period of 12 months. Hence the use of slot type of cavity preparation with reduced loss of the tooth structure is indicated for class III cavities in primary anterior teeth.

  19. Dofetilide: a class III anti-arrhythmic drug for the treatment of atrial fibrillation

    DEFF Research Database (Denmark)

    Torp-Pedersen, C; Brendorp, B; Køber, L

    2000-01-01

    Dofetilide is a class III anti-arrhythmic drug that has been approved for the treatment of atrial fibrillation. Two clinical studies, which enrolled 996 patients, demonstrated pharmacological conversion to sinus rhythm to occur in 30% of patients. Following pharmacological or electrical conversion...

  20. Prevalence of malocclusions in the 13-20-year-old categories of football athletes

    Directory of Open Access Journals (Sweden)

    Luci Alves de Souza

    2011-02-01

    Full Text Available The dentist can offer athletes improvement in their physical performance through the maintenance of oral health, preventing and treating any and all changes in the stomatognathic system, such as dental malocclusions, that compromise the athletes' performance. The objective of this study is to research the presence of dental malocclusions in athletes of the category between 13 and 20 years of age, from the São Paulo Football Club. 84 athletes participated in this study, dealing with the following topics: molar relation (Angle's classification; presence of overbite; underbite; overcrowding; abnormal spacing; open bite; and anterior, posterior, bilateral and unilateral crossbite; midline deviation and facial type (mesofacial, brachyfacial and dolichofacial. Only one table was made, showing percentages. In regard to Angle's molar relation, 89% are in Class I, 8% in Class II, 3% Class III, 9% of the athletes had overbite, 4% had underbite, 13% had overcrowding and 21% had abnormal spacing. In regard to the bite, 11% presented anterior open bite. In regard to crossbite, 7% presented unilateral crossbite on the right side and 2% on the left side; 5% presented posterior crossbite and 4% anterior crossbite. In regard to midline deviations, 4% presented deviation in the maxilla and 33% in the mandible. In regard to facial type: 39% are dolichofacial, 4% brachyfacial and 57% mesofacial. Based on the results shown, proposals for the implementation of dental, phoniatric, and Ear, Nose and Throat (ENT practices are already being discussed with the multidisciplinary team of the club involved.

  1. 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 .

  2. Suspension cell culture as a tool for the characterization of class III peroxidases in sugarcane.

    Science.gov (United States)

    Cesarino, Igor; Araújo, Pedro; Paes Leme, Adriana Franco; Creste, Silvana; Mazzafera, Paulo

    2013-01-01

    Secreted class III peroxidases (EC 1.11.1.7) are implicated in a broad range of physiological processes throughout the plant life cycle. However, the unambiguous determination of the precise biological role of an individual class III peroxidase isoenzyme is still a difficult task due to genetic redundancy and broad substrate specificity in vitro. In addition, many difficulties are encountered during extraction and analysis of cell wall proteins. Since class III peroxidases are also secreted into the apoplast, the use of suspension cell cultures can facilitate isolation and functional characterization of individual isoforms. Here, we report on the characterization of class III peroxidases secreted in the spent medium of sugarcane suspension cell cultures. After treatment with specific inducers of cell wall lignification, peroxidases were isolated and activities assayed with guaiacol, syringaldazine and coniferyl alcohol. Enzymatic activity was not significantly different after treatments, regardless of the substrate, with the exception of methyl-jasmonate treatment, which led to a decreased guaiacol peroxidase activity. Remarkably, peroxidases isolated from the medium were capable of oxidizing syringaldazine, an analog to sinapyl alcohol, suggesting that sugarcane cultures can produce peroxidases putatively correlated to lignification. A proteomic approach using activity staining of 2-DE gels revealed a complex isoperoxidase profile, composed predominantly of cationic isoforms. Individual spots were excised and analyzed by LC-ESI-Q-TOF and homology-based search against the Sugarcane EST Database resulted in the identification of several proteins. Spatio-temporal expression pattern of selected genes was determined for validation of identified class III peroxidases that were preferentially expressed during sugarcane stem development.

  3. Efeitos transversais da expansão rápida da maxila em pacientes com má oclusão de Classe II: avaliação por Tomografia Computadorizada Cone-Beam Transverse effects of rapid maxillary expansion in Class II malocclusion patients: a Cone-Beam Computed Tomography study

    Directory of Open Access Journals (Sweden)

    Carolina Baratieri

    2010-10-01

    Full Text Available OBJETIVO: avaliar por meio de Tomografia Computadorizada Cone-Beam (TCCB os efeitos transversais, imediatos e após o período de contenção, da expansão rápida da maxila (ERM em pacientes com má oclusão de Classe II. MÉTODOS: dezessete crianças (idade inicial média de 10,36 anos com má oclusão de Classe II e deficiência transversal esquelética da maxila foram submetidas ao protocolo de ERM com aparelho expansor de Haas. TCCBs foram realizadas antes dos procedimentos clínicos (T1, imediatamente após a estabilização do parafuso expansor (T2 e após completados 6 meses de contenção e removido o aparelho (T3. Com o software Dolphin, foram possíveis a manipulação das imagens e as mensurações. O teste t de Student pareado foi utilizado para identificar significância estatística (pOBJECTIVE: The aim of this study was to evaluate by Cone-Beam Computed Tomography (CBCT transversal responses, immediately and after the retention period, to rapid maxillary expansion (RME, in Class II malocclusion patients. METHODS: Seventeen children (mean initial age of 10.36 years, with Class II malocclusion and skeletal constricted maxilla, underwent Haas´ protocol for RME. CBCT scans were taken before treatment (T1, at the end of the active expansion phase (T2 and after the retention period of six months (T3. The scans were managed in Dolphin software, where landmarks were marked and measured, on a coronal slice passing through the upper first molar. The paired Student´s t-test was used to identify significant differences (p<0.05 between T2 and T1, T3 and T2, and T3 and T1. RESULTS: Immediately after RME, the mean increase in maxillary basal, alveolar and dental width was 1.95 mm, 4.30 mm and 6.89 mm, respectively. This was accompanied by buccal inclination of the right (7.31° and left (6.46° first molars. At the end of the retention period, the entire transverse dimension increased was maintained and the dentoalveolar inclination resumed

  4. 安氏Ⅱ1类人群牙尖交错位的平衡与稳定性的分析%Study on equilibrium and stabilization of mandibular intercuspal position in Class Ⅱ Division Ⅰ malocclusions

    Institute of Scientific and Technical Information of China (English)

    林焱; 张端强

    2009-01-01

    Objective To analyze the dynamic occlusal contacts in ClassⅡDivision Ⅰ Malocclusions during mandibular movement from muscular contact position(MCP)to intercuspal position(ICP),and to investigate the equilibrium and stabilization of ICP as well as dental morphological factors related to the MCP-ICP discrepancy.Methods 60 subjects with Class Ⅱ Division Ⅰ Malocclusions with no history of orthodontic treatment were employed.T-scan Ⅱ system was used to record and analyze the dynamic occlusal contacts during mandibular movement from MCP to ICP.Dental morphological data were determined by measuring plaster mold.SPSS 12.0 was used for statistics.Resuits There was no significant difference among three repeated measurements of the vertical distance from the center of occlusive force to the midline,D-value of occlusive force between the right and the left side,the numbers of occlusal contacts in the intercuspal position.Significant difference of the posterior arch-widths was observed between the group with and without ICP-MCP discrepancy.There was no significant difference between the groups in the depth fluency of curve of spee,and index of molar relationship.Conclusions Class Ⅱ Division Ⅰ Malocclusions is characterized by stability with intercupided occlusion.ICP-MCP discrepancy maybe associate with abnormal posterior arch-width,and is independent of the vertical and sagittal discrepancy.%目的 研究安氏Ⅱ1类人群肌位到牙位运动过程中的动态咬合接触情况,探讨牙尖交错位的稳定性、肌位-牙位的一致性(平衡性)及其相关的(牙合)形态因素.方法 对60名未经过正畸治疗的安氏Ⅱ1类受试者进行检查,采用T-ScanⅡ咬合分析系统记录并分析其肌位到牙位运动过程中的动态(牙合)接触情况,在模型上分析(牙合)形态,利用SPSS12.0对数据进行分析.结果 ①牙尖交错位上的胎力中心点与中线的垂直距离、左右侧(牙合)力差值及(牙合)接触点数目在

  5. 49 CFR 1150.32 - Procedures and relevant dates-transactions that involve creation of Class III carriers.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 8 2010-10-01 2010-10-01 false Procedures and relevant dates-transactions that involve creation of Class III carriers. 1150.32 Section 1150.32 Transportation Other Regulations Relating.... 10901 § 1150.32 Procedures and relevant dates—transactions that involve creation of Class III...

  6. 40 CFR 144.21 - Existing Class I, II (except enhanced recovery and hydrocarbon storage) and III wells.

    Science.gov (United States)

    2010-07-01

    ... recovery and hydrocarbon storage) and III wells. 144.21 Section 144.21 Protection of Environment... hydrocarbon storage) and III wells. (a) An existing Class I, II (except enhanced recovery and hydrocarbon... decision; or (9) For Class II wells (except enhanced recovery and hydrocarbon storage), five years...

  7. 40 CFR 147.251 - EPA-administered program-Class I, III, IV and V wells and Indian lands.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false EPA-administered program-Class I, III, IV and V wells and Indian lands. 147.251 Section 147.251 Protection of Environment ENVIRONMENTAL... Indian lands. (a) Contents. The UIC program in the State of California for Class I, III, IV and V...

  8. Maxillary Transverse Comparison of Skeletal Class I and Class III Patient Populations Using Cone Beam Computed Tomography

    Science.gov (United States)

    2012-04-13

    depended primarily on the lateral cephalometric analysis , which provides clinicians information in the antero- posterior and vertical dimensions ...significance in three- dimensional cephalometrics (Cho 2009). In his article, Cho proposed an exhaustive analysis using all three planes of space...Malocclusions from ages 10 to 14. Am J Orthod Dentofacial Orthop 2008;133:65-9. 10. Cho HJ. A three- dimensional cephalometric analysis . J Clinical Orthod

  9. Clinical application of self-tapping micro-implants in Angle classmalocclusion%传动直丝弓技术矫治安氏Ⅱ类错(牙合)的临床初步应用

    Institute of Scientific and Technical Information of China (English)

    程学晖; 陈兰; 曾倩

    2011-01-01

    Objective To investigate the clinical course and the control effect of molar of the self-drilling micro-implants as anchorage in orthodontic treatment. And evaluat the curative effect of self-drilling micro-implants. Methods 13 patients with Class Ⅱ division 1 malocclusion aged from 13 to 25 years old, were extract of bilateral maxillary first premolars and implant self-drilling micro-implants before bonding brackets, and use the micro-plantsbefore to backward the anterior teeth. Take the cephalomatric films before and after the treatment and mesure the variation of the teeth. Results 13 patients with self-drilling micro-implants finished orthodontic treatment and the overbite and overjet were normal. After the treatment, there was no serious horizital and vertical movement (P>0.05),the anterior teeth had significant horizital movement (P<0.01) And the patients' lateral profile obviously improved. Conclusion The self-drilling micro-implants was a kind of solid comfortable anchorage system, can solve the crowding and protruded malocclusion with molars' stablitiy. So this method could be widely used in orthodontic treatment.%目的:通过观察传动直丝弓技术矫治的俺氏Ⅱ类错(牙合)患者软组织侧貌、牙的特征性改变,探讨该技术的矫治要点.方法:应用传动直丝弓技术矫治13例(女8例,男5例)安氏Ⅱ类错(牙合)双颌或上颌前突患者,平均年龄1 3.2岁.所有患者均拔除4颗第一前磨牙,按照传动直丝弓技术矫治程序进行矫治.结果:与矫治前相比,矫治后上、下切牙显著内收,软组织侧貌改善明显.结论:传动直丝弓矫治器利用口内支抗、细丝轻力,快速倾斜移动牙齿,准确转矩并正轴的方法,可有效矫治安氏Ⅱ类错(牙合)双颌或上颌前突患者.

  10. Prevalence of malocclusions in Hungarian adolescents.

    Science.gov (United States)

    Gábris, Katalin; Márton, Sándor; Madléna, Melinda

    2006-10-01

    The aim of this epidemiological study was to assess the prevalence of malocclusion, associated caries experience, and level of oral hygiene in the Hungarian population using the World Health Organisation (WHO) questionnaire designed to assess dentofacial anomalies. A total of 483 adolescents (289 girls, 194 boys), aged 16-18 years, were assessed. Orthodontic anomalies were detected in 70.4 per cent of the sample. Crowding and spacing were observed in 14.3 and 17 per cent, respectively, with the latter being more prevalent in the maxilla than in the mandible (10.4 and 2.9 per cent, respectively). A Class I occlusion was found in 52.8 per cent of the subjects. A half cusp anomaly in the antero-posterior molar relationship was more prevalent than a full cusp anomaly (26.9 and 20.3 per cent, respectively). The decayed, missing, and filled teeth (DMFT), the decayed, missing, and filled surfaces (DMFS), and the visible plaque indices scores (VPI) of the 340 adolescents with malocclusion were significantly higher (P adolescents who displayed no anomalies. The prevalence of malocclusion in the Hungarian population seems to be comparable with other European communities.

  11. THERAPEUTIC DIFFICULTIES IN ACHIEVEMENT OF OPTIMAL ROOT COVERAGE AND AESTHETIC IN CLASS III GINGIVAL RECESSION.

    Directory of Open Access Journals (Sweden)

    Christina Popova

    2013-07-01

    Full Text Available The width of the attached gingiva is defined as a distance between the depth of the gingival sulcus or gingival/periodontal pocket to the mucogingival junction. Authors suggest that a minimal amount of attached gingiva is necessary to ensure the gingival health. When the buccal bone plate and gingival tissues are thin and the position of the tooth is too vestibular gingival margin often displaces apically, and gingival recession develops. In the presence of gingival recession and reduced vestibular depth oral hygiene procedures are embarrassed.The definition of class III gingival recession is marginal lack of tissue extended to/or beyond the mucogingival junction with bone and soft tissue loss interdentally or malpositioning of the tooth.Prognosis for class III and IV gingival recession is that only partial coverage can be expected after root coverage procedures - FGG (free gingival graft or connective tissue graft (CTG. Adjunctive surgical techniques would be helpful to achieve better aesthetic outcomes.

  12. Gap junctions enhancer combined with Vaughan Williams class III antiarrhythmic drugs, a promising antiarrhythmic method?

    Science.gov (United States)

    Li, Lian-dong; Zhang, Cun-tai; Ruan, Lei; Ni, Ming-ke; Quan, Xiao-qing

    2011-01-01

    Arrhythmias is one of the leading causes of death in the world. Current antiarrhythmic drugs are limited by unsatisfactory efficacy and adverse effects such as proarrhythmias. Reentry mechanism plays an important role in persistence of arrhythmias. Reentry can only continue when reentry path-length is longer than cardiac wavelength which is equal to the product of conduction velocity (CV) and effective refractory period (ERP). Gap junctions uncoupling is associated with proarrhythmic CV slowing and transmural dispersion of repolarization (TDR) increasing in many cardiac diseases. Vaughan Williams class III antiarrhythmic drugs prolong ERP with an augmented TDR which is the main mechanism of the proarrhythmic effects. Gap junctions enhancer can augment CV and diminish TDR. As a result, gap junctions enhancer combined with class III drugs may be a promising antiarrhythmic method.

  13. Early treatment of patient with Class III skeletal and dental patterns

    Directory of Open Access Journals (Sweden)

    Marcos Alan Vieira Bittencourt

    2015-12-01

    Full Text Available Abstract Class III skeletal pattern is characterized by disharmony between maxillary and mandibular basal bones anteroposteriorly, and might or might not be associated with dental changes. In general, facial esthetics is hindered significantly, which most of times is the reason why patients or patient's guardians seek treatment. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO in partial fulfillment of the requirements for Diplomate recertification and revalidation.

  14. 3-D Finite Element Analysis for Craniofacial Complex in Different Occlusal Positions between Skeletal ClassMalocclusion and Individual Normal Occlusion%骨性安氏Ⅲ类错(牙合)与正常(牙合)在不同(牙合)位状态下颅面复合体的三维有限元分析

    Institute of Scientific and Technical Information of China (English)

    阎秀林; 郭慧萍; 白秋野; 卢利

    2013-01-01

    Objective To investigate the role of shape change in craniofacial complex during forming high-angle classmalocclusion, and to further investigate the pathogenesis and prognosis of high-angle class HI malocclusion. Methods Two finite element models, normal oc- clusal model and skeletal high-angle classmalocclusion, were included in this study. The strain-stresses on the complexes were analyzed by simulating the forces from masticatory muscles in different occlusal positions. Results The distributions of strain-stress were around the acetabulum of temporomandibular joint and the root of zygomatic arch on the craniomaxillary complex and around the labial and lingual bone plate on the common boundary between the front of the ramus and the body in the mandible in each different occlusal position (intercuspal position,maximum mouth opening position,protrusive displacement position). Conclusion The skeletal high-angle classmalocclusions were formed by camouflage of craniofacial complex, and the shapes of craniofacial complex had no relationship with the relapse of this kind of malocclusion.%目的 明确颌骨形态的改变在安氏Ⅲ类错(牙合)高角病例发生、发展中所起的作用,为进一步研究安氏Ⅲ类错(牙合)高角病例的病因和预后判断因子奠定基础.方法 分别选取正常(牙合)和骨性安氏Ⅲ类错(牙合)高角复发病例,分别对颅面复合体进行三维重建和在不同(牙合)位模拟咀嚼肌力进行有限元分析.结果 无论在正中(牙合)位、最大张口位还是最大前伸位,颅面上颌复合体的应力和应变主要集中在关节窝和颧弓根部,在下颌骨主要集中在下颌升支前缘与下颌体交界处的唇侧和舌侧骨板.结论 骨性安氏Ⅲ类高角病例颅面复合体形态的改变是机体代偿性适应的结果,与该畸形的复发无关.

  15. Application of Rapid expansion combined with bow in front of traction in skeletal classmalocclusion%快速扩弓结合前方牵引在骨性Ⅲ类错合矫治中的应用

    Institute of Scientific and Technical Information of China (English)

    唐棠

    2011-01-01

    Objective To investigate the clinical efficacy of expansion arch appliance with front traction skeletal malocclusion Class Ⅲ . Methods Our hospital from October 2008 to July 2011 were treated 27 cases of bone growth and development of malocclusion ClassⅢ Rapid expansion arch with front traction method of treatment, before and after treatment of the head of the lateral and gypsum model to measure, evaluate soft and hard tissue changes before and after treatment And the PAR index. Results The group of 27 patients with bone classmalocclusion patients after rapid expansion arch with front traction treatment for 6 to 8 months after the first joint anti - teeth to be corrected , the relationship between canines and molars neutral, significantly improved the side - type. Conclusions The combination of rapid expansion arch in front of traction treatment of bone growth and development of malocclusion Class Ⅲ can effectively promote the maxillary forward growth, inhibit the growth of the mandible, is conducive to skeletal malocclusion class Ⅲ adjustment.%目的 探讨扩弓结合前方牵引矫治骨性Ⅲ类错合的临床疗效.方法 选择商丘市中心医院2008年10月至2011年7月收治的27例生长发育期的骨性Ⅲ类错合应用快速扩弓结合前方牵引的方法进行矫治,对矫治前后的头颅侧位片和石膏模型进行测量,评价治疗前后软硬组织的变化及PAR指数.结果 本组27例骨性Ⅲ类错合患者经快速扩弓结合前方牵引治疗6~8个月后,反合的前牙得到纠正,尖牙与磨牙的关系中性,侧面型得到明显改善.结论 快速扩弓结合前方牵引治疗生长发育期骨性Ⅲ类错合可有效促进上颌骨向前生长,抑制下颌骨生长,有利于Ⅲ类骨骼错合畸形的调整.

  16. Free gingival graft in the treatment of class III gingival recession

    Directory of Open Access Journals (Sweden)

    Remya V

    2008-01-01

    Full Text Available Aim: The purpose of this study was to assess the success and predictability of root coverage and esthetics obtained with free gingival grafts (FGGs in the treatment of early class III gingival recessions for a period of 12 months. Materials and Methods: Ten patients contributed to 12 sites, each with early class III recession with interdental bone loss £4 mm from cemento enamel junction(CEJ. Clinical parameters recorded at baseline and at 1, 6, and 12 months were probing depth (PD, recession depth (RD, recession width (RW, and clinical attachment level (CAL. Results: Reduction of recession resulted in a significant gain in CAL and PD at the end of 12 months. A statistically significant mean root coverage of 41.25 ± 21.07% was obtained at the end of 12 months. A statistically significant improvement in Visual Analog Scale score was seen after a 12-month follow-up period. Conclusion: In a south Indian population, early class III gingival recessions treated with FGG procedures resulted in 40-50% root coverage with fairly acceptable esthetics.

  17. Crystal structure of class III chitinase from pomegranate provides the insight into its metal storage capacity.

    Science.gov (United States)

    Masuda, Taro; Zhao, Guanghua; Mikami, Bunzo

    2015-01-01

    Chitinase hydrolyzes the β-1,4-glycosidic bond in chitin. In higher plants, this enzyme has been regarded as a pathogenesis-related protein. Recently, we identified a class III chitinase, which functions as a calcium storage protein in pomegranate (Punica granatum) seed (PSC, pomegranate seed chitinase). Here, we solved a crystal structure of PSC at 1.6 Å resolution. Although its overall structure, including the structure of catalytic site and non-proline cis-peptides, was closely similar to those of other class III chitinases, PSC had some unique structural characteristics. First, there were some metal-binding sites with coordinated water molecules on the surface of PSC. Second, many unconserved aspartate residues were present in the PSC sequence which rendered the surface of PSC negatively charged. This acidic electrostatic property is in contrast to that of hevamine, well-characterized plant class III chitinase, which has rather a positively charged surface. Thus, the crystal structure provides a clue for metal association property of PSC.

  18. Craniofacial tissue characteristics in adult Angle class II malocclusions: cephalometric X-ray measurement%成人Anglell类错牙合软硬组织颅面结构特征:计算机X射线头影测量

    Institute of Scientific and Technical Information of China (English)

    李晓光; 满大鹏; 齐炜峰; 孔宇

    2015-01-01

    BACKGROUND:Studies have shown that there are large differences in the thickness of the soft tissue overlying hard tissue, and the soft tissue does not uniformly overly the hard tissue, indicating simple hard tissue measurement wil not harvest ideal facial profile in clinical treatment of malocclusions. OBJECTIVE: To study the craniofacial soft and hard tissue characteristics in the adult Angle class II malocclusion, and then to analyze the relationship between Angle class II1 and class II2 malocclusions. METHODS: Sixty patients with adult Angle II malocclusion who were accepted by the Department of Orthodontics of Stomatological Hospital Affiliated to Jiamusi University from 2011 to 2014, on gender parity, aged 18-38 years (mean age of 26.3 years), including 30 cases of Angle class II1 and 30 cases of Angle class II2. Differences between the adult Angle class II1 and class II2 malocclusion patients were compared by cephalometric analysis based on X-ray measurement. Statistical correlation analysis was performed.RESULTS AND CONCLUSION:(1) Comparisons of hard tissue measurement of adult Angle class II1 and Angle class II2 malocclusions showed that: SNB, SND, ANB, FH-NP, U1-SN (P < 0.001), LI-NB (P< 0.01), L1-MP (P < 0.01), U1-L1 (P < 0.001) exhibited statisticaly significant differences between two groups (P < 0.05). (2) Comparisons of soft tissue measurement of adult Angle class II1 and Angle class II2 malocclusions showed that: there were significant differences in the ULA'-FH, LLNs-FH, ULNs-FH, CmSnUL, E-LL (P < 0.05). (3) There was a correlation between the soft and hard tissue of adult Angle class II1 and Angle class II2 malocclusions in al measurement indexes, but the correlativity exists differently. These findings indicate that for Angle class II1malocclusion, the maxilary and anterior teeth protrusions have a certain influence on the position of the lower lip; for Angle class II2 malocclusion, only maxilary protrusion can impact the position of the soft

  19. X-Shooter spectroscopy of young stellar objects III. Photospheric and chromospheric properties of Class III objects

    CERN Document Server

    Stelzer, B; Alcala, J M; Manara, C F; Biazzo, K; Covino, E; Rigliaco, E; Testi, L; Covino, S; D'Elia, V

    2013-01-01

    We analyzed X-Shooter/VLT spectra of 24 ClassIII sources from three nearby star-forming regions (sigmaOrionis, LupusIII, and TWHya). We determined the effective temperature, surface gravity, rotational velocity, and radial velocity by comparing the observed spectra with synthetic BT-Settl model spectra. We investigated in detail the emission lines emerging from the stellar chromospheres and combined these data with archival X-ray data to allow for a comparison between chromospheric and coronal emissions. Both X-ray and Halpha luminosity as measured in terms of the bolometric luminosity are independent of the effective temperature for early-M stars but decline toward the end of the spectral M sequence. For the saturated early-M stars the average emission level is almost one dex higher for X-rays than for Halpha: log(L_x/L_bol) = -2.85 +- 0.36 vs. log(L_Halpha/L_bol) = -3.72 +- 0.21. When all chromospheric emission lines (including the Balmer series up to H11, CaII HK, the CaII infrared triplet, and several HeI...

  20. Evaluation correction of mild skeletal Classmalocclusion by extraction of the single mandibular incisor%拔除一颗下切牙正畸掩饰性矫治成人轻度前牙骨性反(牙合)

    Institute of Scientific and Technical Information of China (English)

    田晓光; 段银钟; 郭冬梅; 王海雪; 周慧霞; 刘利娜

    2011-01-01

    significantly. Li-E distance and Li-H distance decreased by 3.1 mm-.2.8 mm respectively. UL-E distance and LL-E distance decreased by 0.9 mm、 1.7 mm respectively (P < 0.01).The distance between lower canine decreased by 2.4 mm (P <0.05). Statistically significant differences were found in these changes. Conclusion: Correction of mild skeletal Class III malocclusion by extraction of a single mandibular incisor is an unusual therapeutic way, but it is a useful method for the treatment of mild skeletal crossbite.

  1. A preliminary study of skeletal symmetry in patients with skeletal Class Ⅲ and Classmalocclusions based on Cone-Beam CT images%骨性Ⅲ类与Ⅰ类患者面部骨骼对称性的锥形束CT影像学初步研究

    Institute of Scientific and Technical Information of China (English)

    丛超; 梁成; 谷岩

    2015-01-01

    Objective Compare the difference of skeletal symmetry between Class Ⅲ and Class Ⅰ facial symmetry patients based on CBCT images.Evaluate the correlation between ANB angle and skeletal symmetry in patients with Class Ⅲ and Classmalocclusions.Methods The samples were collected from the patients in Dept.of orthodontics, Peking University School of Stomatology from 2012~2013 according to the inclusion and exclusion criteria in the current study.According to the ANB angle, the samples were divided into two groups: the Class Ⅲ group (26 subjects) and the Class Ⅰ group (19 subjects).We used Dolphin 11.7 to determine the anatomic landmarks and calculated the landmarks' asymmetry index (AI).The data analysis was performed by Medclac software.Results No significant difference on skeletal landmarks asymmetry index was found in facial symmetric patients with skeletal Class Ⅰ and Classmalocclusions (P>0.05).With the decrease of ANB angle, no significant increase of asymmetry index was noted (P>0.05).Conclusions No difference on skeletal asymmetry was found in facial symmetric patients with skeletal Class Ⅰ and Classmalocclusions;No correlation between ANB angle and asymmetry index.%目的 基于锥形束CT影像资料比较面部基本对称骨性Ⅲ类与骨性Ⅰ类患者骨骼对称性的差异,探讨骨性Ⅲ类患者面部骨骼对称性与ANB角度的相关性.方法 按筛查标准筛查2012~2013年度于北京大学口腔医院就诊并拍摄大视野CBCT的面部基本对称患者的影像资料,根据ANB角度(2.7°±2.0°)分为骨性Ⅲ类组(26例)与骨性Ⅰ类组(19例).运用Dophlin 11.7软件对患者的锥形束CT影像资料进行定点,测量其不对称系数.应用Medclac软件进行数据的统计分析.结果 骨性Ⅲ类与骨性Ⅰ类患者各骨性标志点不对称系数无统计学差异(P>0.05);骨性Ⅲ类患者骨性标志点不对称系数与ANB角度之间无相关性(P>0.05).结论 面部基本对称

  2. Reliability of overbite depth indicator (ODI and anteroposterior dysplasia indicator (APDI in the assessment of different vertical and sagittal dental malocclusions: a receiver operating characteristic (ROC analysis

    Directory of Open Access Journals (Sweden)

    Farheen Fatima

    Full Text Available ABSTRACT Introduction: Differential diagnosis of skeletal and dental relationships is crucial for planning orthodontic treatment. Overbite depth indicator (ODI and anteroposterior dysplasia indicator (APDI had been introduced in the past for assessment of vertical and sagittal jaw relationships, respectively. Objective: The objectives of this study were to evaluate the reliability of ODI and APDI in overbite and Angle malocclusions, as well as assess their diagnostic reliability among males and females of different age groups. Material and Methods: This study was conducted using pretreatment dental casts and lateral cephalograms of 90 subjects. For ODI, subjects were divided into three groups based on overbite (normal overbite, open bite and deep bite. Likewise, the same subjects were divided for APDI into three groups, based on Angle's malocclusion classification (dental Class I, II and III malocclusions. Mann-Whitney U test was applied for comparison of study parameters regarding sex and different age groups. The mean values of ODI and APDI were compared among study groups by means of Kruskal-Wallis and post-hoc Dunnet T3 tests. The receiver operating characteristic (ROC curve was applied to test diagnostic reliability. Results: Insignificant differences were found for ODI and APDI angles, particularly in regards to sex and age. Significant intergroup differences were found in different overbite groups and Angle's classification for ODI and APDI, respectively (p < 0.001. ROC showed 91% and 88% constancy with dental pattern in ODI and APDI, respectively. Conclusions: ODI can reliably differentiate deep bite versus normal overbite and deep bite versus open bite. APDI can reliably differentiate dental Class I, II and III malocclusions.

  3. Nonsurgical treatment of adult open bite using edgewise appliance combined with high-pull headgear and class III elastics.

    Science.gov (United States)

    Saito, Isao; Yamaki, Masaki; Hanada, Kooji

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