Comparison of dental arch measurements according to the grade and the obstructive character of adenoids.

INTRODUCTION: Obstructive adenoid hypertrophy is cited as one of the causes of mouth breathing and leads to disharmony in the development of orofacial structures. The objective of this study was to compare the measurements of dental arches according to the grade and the obstructive character of adenoids. MATERIALS AND METHODS: A cross-sectional study was carried out with 86 children. The grade and the obstructive character of adenoids were determined from Holmberg and Cohen's radiographic methods respectively. Dental arch measurements were taken on dental casts. A t-test and a Chi2 test were performed respectively to compare the quantitative and qualitative variables of dental arches according to the obstructive character. An Anova test made it possible to compare the quantitative variables according to the grade as Holmberg defined it. For variables that showed significant differences, a Post Hoc test was used. The significance level was set at P=0.05. RESULTS: Subjects with obstructive adenoids had a shorter posterior mandibular length (P=0.04) and a greater overbite (P=0.04) than those with non-obstructive adenoids. Those with grade 4 had a greater arch depth (P=0.02) and were more prone to open bite(P=0.03). CONCLUSION: A prevention program involving the otorhinolaryngologist and the orthodontist for subjects with obstructive adenoids or grade 4 is necessary to minimize their influence on dental arch relationships.

Dental anomalies in different growth and skeletal malocclusion patterns.

OBJECTIVES: To evaluate prevalence, distribution, and sexual dimorphism of dental anomalies (DA) among different skeletal malocclusions (SM) and growth patterns (GP) under the hypothesis that specific clinical patterns exist and may indicate common etiological roots. MATERIALS AND METHODS: A total of 1047 orthodontic records of patients older than 8 years were evaluated. The SN-GoGn angle was used to classify GP (hypodivergent, normal, and hyperdivergent), and the ANB angle was used to verify SM (Angle Classes I, II, and III). These assessments were done from lateral cephalometric radiographs. DA were diagnosed using panoramic radiographs by one calibrated investigator. Odds ratios, chi-square, and Student's t-tests were used. RESULTS: Of the subjects, 56.7% were female, with mean age of 16.41 (±10.61) years. The prevalence of DA was 15.7%. Impaction and tooth agenesis were the most prevalent DA, with relative frequencies of 14.4% and 9.7%, respectively. DA were most prevalent in Class III SM (80.8%) and in hypodivergent GP (82.5%), although this was not statistically significant. Tooth agenesis ( P < .01) and microdontia ( P = .025) were significantly more common among hypodivergent GP and Class III SM, respectively. CONCLUSIONS: The results of this study support the idea that DA are preferentially associated with certain patterns of malocclusion.

Class II malocclusion with accentuated occlusal plane inclination corrected with miniplate: a case report.

INTRODUCTION: A canted occlusal plane presents an unesthetic element of the smile. The correction of this asymmetry has been typically considered difficult by orthodontists, as it requires complex mechanics and may sometimes even require orthognathic surgery. OBJECTIVE: This paper outlines the case of a 29-year-old woman with Class II malocclusion, pronounced midline deviation and accentuated occlusal plane inclination caused by mandibular deciduous molar ankylosis. METHODS: The patient was treated with a miniplate used to provide anchorage in order to intrude maxillary teeth and extrude mandibular teeth on one side, thus eliminating asymmetry. Class II was corrected on the left side by means of distalization, anchored in the miniplate as well. On the right side, maxillary first premolar was extracted and molar relationship was kept in Class II, while canines were moved to Class I relationship. The patient received implant-prosthetic rehabilitation for maxillary left lateral incisor and mandibular left second premolar. RESULTS: At the end of treatment, Class II was corrected, midlines were matched and the canted occlusal plane was totally corrected, thereby improving smile function and esthetics.

Class II malocclusion with accentuated occlusal plane inclination corrected with miniplate: a case report

ABSTRACT Introduction: A canted occlusal plane presents an unesthetic element of the smile. The correction of this asymmetry has been typically considered difficult by orthodontists, as it requires complex mechanics and may sometimes even require orthognathic surgery. Objective: This paper outlines the case of a 29-year-old woman with Class II malocclusion, pronounced midline deviation and accentuated occlusal plane inclination caused by mandibular deciduous molar ankylosis. Methods: The patient was treated with a miniplate used to provide anchorage in order to intrude maxillary teeth and extrude mandibular teeth on one side, thus eliminating asymmetry. Class II was corrected on the left side by means of distalization, anchored in the miniplate as well. On the right side, maxillary first premolar was extracted and molar relationship was kept in Class II, while canines were moved to Class I relationship. The patient received implant-prosthetic rehabilitation for maxillary left lateral incisor and mandibular left second premolar. Results: At the end of treatment, Class II was corrected, midlines were matched and the canted occlusal plane was totally corrected, thereby improving smile function and esthetics.

RESUMO Introdução: o plano oclusal inclinado representa um elemento antiestético para o sorriso. A correção dessa assimetria é normalmente considerada difícil pelos ortodontistas, requerendo mecânica complexa e, algumas vezes, até cirurgia ortognática. Objetivo: esse artigo descreve o caso de uma paciente de 29 anos, portadora de má oclusão de Classe II, com considerável desvio das linhas médias e acentuada inclinação do plano oclusal, causada pela anquilose de molar decíduo inferior. Métodos: a paciente foi tratada com ancoragem em miniplaca, para promover a intrusão dos dentes superiores e extrusão dos dentes inferiores em um lado, eliminando a assimetria. A Classe II foi corrigida no lado esquerdo por meio de distalização, também ancorada na miniplaca. No lado direito, o primeiro pré-molar superior foi extraído e a relação de molares de Classe II foi mantida, enquanto os caninos foram movidos para relação de Classe I. A paciente recebeu reabilitação por meio de implante e prótese no incisivo lateral superior esquerdo e no segundo pré-molar inferior esquerdo. Resultados: ao término do tratamento, a Classe II foi corrigida, as linhas médias estavam coincidentes e a inclinação do plano oclusal foi totalmente corrigida, melhorando consideravelmente os aspectos funcionais e estéticos da oclusão.

Tratamento da classe II com o auxílio de aparelhos funcionais fixos / Class II treatment with the aid of fixed functional appliances

A má-oclusão de classe II foi descrita por Angle e é caracterizada por alterações dentárias e/ou esqueléticas. Seja qual for a combinação dos fatores que acometem o paciente de classe II, o sulco vestibular do molar inferior encontra-se distalmente à cúspide mesiovestibular do molar superior. Estratégias biomecânicas para estabelecer a correta relação entre os arcos envolvem elásticos intermaxilares e dispositivos removíveis que necessitam da colaboração do paciente, ou ainda de aparelhos funcionais fixos, os quais dispensam a colaboração e prometem maior eficiência clínica. O objetivo deste artigo foi revisar as características gerais destes tipos de aparelho, sua forma de funcionamento e aplicabilidades clínicas.

The class II malocclusion has been described by Angle and characterized by dental and/or skeletal abnormalities. Whatever the combination of factors that affect the class II patients, the buccal groove of the lower molar is distal to the mesiobuccal cusp of the upper molar. Biomechanical strategies to establish the correct relationship between the archs involve intermaxillary elastics and removable devices that require the patient's cooperation or fixed functional appliances, which do not require collaboration and promise greater clinical efficiency. The aim of this article was to review the general characteristics of these types of appliance, how they work, and their and clinical applications.

Orthognathic Surgery in Patients With Large Condylar Destructions.

Condylar resorption is understood as changes in shape and volume of the condylar bone, due to local, systemic, and iatrogenic factors. The occurrence of condylar resorption after orthognathic surgery can occur when the condylar repositioning in mandibular fossa is performed improperly. In addition, systemic diseases such as osteoarthritis and rheumatoid arthritis seem to influence this process. The aim of this study was to report 3 cases of patients with severe condylar alterations, submitted to orthognathic surgery for treatment of dentofacial deformities. Considerations regarding the diagnosis, surgical planning (counterclockwise rotation), surgical techniques (bilateral sagittal split osteotomy, bimaxillary osteotomies, rigid fixation, maxillomandibular fixation period), and results (short terms) are discussed.

Evaluation of long-term stability of mesiodistal axial inclinations of maxillary molars through panoramic radiographs in subjects treated with Pendulum appliance

Objective: To evaluate the stability of mesiodistal inclination of maxillary molars produced by a pendulum appliance, five years after completion of orthodontic treatment. Angulation changes were compared to an untreated sample. Methods: The sample consisted of 20 patients (14 females and 6 males) with Class II, Division 1 malocclusion that was treated through molar distalization with a pendulum appliance followed by cervical headgear and full fixed appliances. Maxillary molar inclination was evaluated through panoramic radiograph. The mean age at pretreatment was 14.3 ± 1.6 years, whereas at immediate post-treatment it was 18.6 ± 1.8 years, and at long-term post-treatment it was 23.8 ± 2.0 years. A control group of 16 untreated individuals with untreated normocclusion ranging in age from 12 to 17 years old were used as comparison group. Data were statistically analyzed with independent t-tests and ANOVA test followed by Tukey post-hoc tests. Results: Statistically significant differences were found between T1(94.50) and T2 (98.80) as well as between T2 and T3 (94.70) for maxillary first molars. Maxillary second molars did not show any statistically significant positional changes during the evaluated time periods T1 (107.50), T2 (109.30) and T3 (106.90). Conclusion: Although maxillary first molars underwent distal crown inclination immediately after treatment, approximately five years thereafter their roots tended to upright close to the pretreatment positions.

Objetivo: avaliar a estabilidade da inclinação mesiodistal dos molares superiores cinco anos após o tratamento realizado com o aparelho Pendulum seguido de aparelho ortodôntico fixo. As mudanças na angulação foram comparadas com uma amostra não tratada. Métodos: a amostra consistiu de 20 pacientes (14 do sexo feminino e 6 do masculino) com má oclusão de Classe II, divisão 1 tratados por meio da distalização dos molares com o aparelho Pendulum seguido de ancoragem extrabucal cervical e aparelho fixo. A inclinação dos molares superiores foi avaliada por meio de radiografias panorâmicas. A média da idade ao início do tratamento foi de 14,3 ± 1,6 anos; ao final do tratamento, de 18,6 ± 1,8 anos e, no longo tempo pós-tratamento, de 23,8 ± 2,0 anos. Para comparação, foi usado um grupo controle com 16 indivíduos não tratados e com oclusão normal, apresentando idades entre 12 e 17 anos. Os dados foram analisados estatisticamente pelo teste t independente e ANOVA, seguido do teste de Tukey. Resultados: os primeiros molares superiores apresentaram diferenças estatisticamente significativas entre T1 (94,5o) e T2(98,8o), bem como entre T2 e T3(94,7o). Os segundos molares superiores não apresentaram alterações estatisticamente significativas no seu posicionamento durante os períodos avaliados, T1 (107,5o), T2(109,3o) e T3 (106,9o). Conclusões: apesar de os primeiros molares superiores apresentarem inclinação distal da coroa imediatamente após o tratamento, aproximadamente cinco anos depois suas raízes tendem a ocupar posições próximas às do início do tratamento.

Multiple tooth anomalies in a nonsyndromic patient with class II division 2 malocclusions: A case report and a literature review.

Reports in the literature about the craniofacial characteristics of patients with class II division 2 malocclusions show a lot of different patterns accompanied by palatally displaced upper incisors, congenital missing teeth, polydiastema, fusion, germination, tooth impaction, peg-shaped lateral incisors, persistent teeth, hypodontia, persistent deciduous teeth, transpositions, and supernumerary teeth. The following case report focuses on the description of the clinical characteristics observed on a patient with a very unusual conjunction of dental and skeletal anomalies mentioned above, as well as a literature review on the related issues. Extra-intra-oral examinations, radiographic evaluations, orthodontic consultation, and reviewing the literature concluded that this nonsyndromic patient that refused to receive all dental treatment approaches is special with its uniqueness.

Correction of the occlusal and functional sequelae of mandibular condyle fractures using orthodontic mini-implant molar intrusion.

We report on the non-surgical management of an adult female whose bilateral mandibular condylar fractures had resulted in a clockwise (posterior) mandibular rotation, limitation of mandibular movements and increased occlusal loading on the molar teeth. She refused maxillary surgery and was treated with a minimally-invasive approach, involving orthodontic fixed appliances and mini-implant intrusion of the maxillary molar teeth. This provided both occlusal and functional improvements, including a significant increase in the inter-incisal distance, which were stable after one year of retention.

[TMJ disc displacement as a cause of changes in facial skeletal morphology].

OBJECTIVE: To evaluate an efficiency of TMJ open disc repositioning surgery with use of bone anchors. MATERIAL AND METHODS: TMJ open disc repositioning surgery was indicated for patients with TMJ anterior disc displacement without reduction and skeletal class II or asymmetric forms of dysgnathia related to condyle resorption. Surgery was performed on 9 patients divided into two groups: the first one (5 patients) consisted of patients that were seeking help for bite problems, the second one (4 patients) consisted of patients with signs of TMJD, such as decreased mouth opening and pain in TMJ area. RESULTS: The first group patients underwent open disc repositioning and orthognathic surgery with counterclockwise rotation of occlusal plane. All the patients showed stability in skeletal and occlusal elements at 6 months follow-up period. The second group patients underwent disc-repositioning surgery only. In all the cases pain was completely eliminated but there was no sufficient improvement in MIO at 6 months follow-up period. Open TMJ disc repositioning surgery can be used for prevention of relapse after orthognathic surgery in patients with TMJ internal derangements such as anterior disc displacement without reduction.

Velopharyngeal, speech and dental characteristics as diagnostic aids in 22q11.2 deletion syndrome.

This study examines velopharyngeal, speech, and dental parameters as possible diagnostic aids in 22q11.2 deletion syndrome. It is a retrospective study on 56 individuals. Twenty-one percent had a submucous cleft palate and 41 percent required palate surgery for speech. Common dental findings included poor oral hygiene, multiple carious lesions, congenitally missing teeth, class II malocclusion, and open bite.There are common findings that can aid the dental practitioner in recognizingthe syndrome and make appropriate referrals.

Facial and dental alterations according to the breathing pattern

There is controversy in the literature about possible interaction of the respiratory mode with the facial and dental structures. OBJECTIVES: The aim of this study was to perform a longitudinal assessment of the changes in facial and dental structures in Angle's Class II, division 1 malocclusion individuals, divided according to the respiratory pattern (predominantly nasal or mouth), at two distinct moments of craniofacial development. MATERIAL AND METHODS: Pogonium and nose measurements were made on the lateral cephalometric tracings (LS'-Pog', LS'-B', B'-Pog', Pog'-PogTeg', Line NB, Pog-NB, N'-Prn, Prn-NPog, N-Prn-Sn, Prn-Sn-LS). Dental measurements were made on the plaster models (distances between the tips of the canine cusps and the tips of mesial cusps of the first molars) of 40 individuals aged 10 to 14 years (moment 1) and 13 to 16 years (moment 2), 23 being nose breathers (NB) and 17 being predominantly mouth breathers (MB). RESULTS: The Student's-t test and two-way ANOVA with repeated measures were applied to indicate differences between the mean values of these variables according to the moments and/or respiratory mode. CONCLUSIONS: There were alterations in the facial measurements, without interference of the breathing pattern. However, the breathing pattern infuenced dental alterations.

Mordida profunda / Deep bite

Los trastornos oclusales van ligados a factores hereditarios, generales y locales. Las maloclusiones verticales más comunes son: la mordida abierta, intensificada por los hábitos insanos como la interposición labial, la deglución atípica y la succión del pulgar, característicos en la edad infantil; y la sobremordida vertical o mordida profunda, que si no se corrige a tiempo ocasiona en la edad adulta trastornos de disfunción temporomandibular, desgastes dentarios, retracciones gingivales y problemas periodontales. El objetivo de este trabajo es describir la etiología y sus variantes, y el diagnóstico y el tratamiento de las disgnacias entre la base craneal y ambos maxilares, con el propósito de brindar al especialista una guía para la identificación de la anomalías esqueletal o dentaria y la elección del plan de tratamiento adecuado para cada caso en particular.

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

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.

Mouth breathing: adverse effects on facial growth, health, academics, and behavior.

The vast majority of health care professionals are unaware of the negative impact of upper airway obstruction (mouth breathing) on normal facial growth and physiologic health. Children whose mouth breathing is untreated may develop long, narrow faces, narrow mouths, high palatal vaults, dental malocclusion, gummy smiles, and many other unattractive facial features, such as skeletal Class II or Class III facial profiles. These children do not sleep well at night due to obstructed airways; this lack of sleep can adversely affect their growth and academic performance. Many of these children are misdiagnosed with attention deficit disorder (ADD) and hyperactivity. It is important for the entire health care community (including general and pediatric dentists) to screen and diagnose for mouth breathing in adults and in children as young as 5 years of age. If mouth breathing is treated early, its negative effect on facial and dental development and the medical and social problems associated with it can be reduced or averted.

Considerações sobre a etiologia da classe II subdivisão / Considerations about the etiology of the class II subdivision malocclusion

É um desafio o tratamento ortodôntico da Classe Il subdivisão devido à relação oclusal assimétrica (Classe II de um lado da arcada dentária e Classe I do outro) e a dificuldade em diagnosticar seus fatores etiológicos. Com o objetivo de facilitar ao ortodontista o tratamento da Classe II subdivisão foi realizada uma pesquisa sobre a etiologia desta má-oclusão. Foram pesquisados vários bancos de dados eletrônicos (Pubmed, Medline, Biblioteca Cochrane, Scopus) e realizadas pesquisas secundárias. Osdados coletados demonstraram que nesta má-oclusão existe uma predominância de alterações dentoalveolares que envolvemprincipalmente o arco inferior, com o molar inferior posicionado mais posterior no lado da Classe II e um desvio de linha média dentária inferior para o lado da Classe II.Secundariamente existe uma assimetria no arco superior, com molar mais mesializado no lado da Classe II e um desvio de linha média dentária para o lado da Classe I. Portanto, a Classe II subdivisão tem uma etiologia primordialmente dentoalveolar inferior, secundariamente dentoalveolar superior e casualmente esquelética. Quandopresente, a alteração esquelética é suave e compromete principalmente a mandíbula.

The orthodontic treatment of the Class II subdivision malocclusion is challenging due to the asymmetrical occlusal relationship (Class II on one side of the dental arch and Class I on the other side) and to the complexity in the diagnosis of its etiological factors. The objective of the actual study was to bring information that facilitates the orthodontist to accomplish the Class II subdivisionmalocclusion treatment. Electronic data sources available were examined (Pubmed, Medline, Cochrane Library, Scopus) as well as secondary sources searched. The data collected indicate that in this malocclusion there is a predominance of dentoalveolaralterations which involve mainly the mandibular arch with the mandibular molar positioned more posterior on the side of the Class II and a shift of the mandibular dental medline towards the side of the Class II. Secondary there was an. asymmetry in the maxillaryarch, with greater mesial migration of the maxillary molar on the side of the Class II and a dental midline shift towards the side of the Class I. Therefore, the etiology of the Class II subdivision malocclusion is primarily dentoaveolar mandibular; secondarilydentoalveolar maxillary and occasionally skeletal. When the skeletal asymmetry is present, it is slight and it mainly compromises the mandible.

The interdisciplinary management of a Class II division 1 malocclusion with an associated mandibular defect following surgical excision of fibromatosis: a clinical report.

Surgical excision of malignant or nonmalignant tumors of the maxillofacial region can result in significant anatomical loss/compromise. Correction of the residual defect can be complicated by the presence of an underlying malocclusion and can be a significant clinical challenge if large numbers of teeth have been lost in surgery. This clinical report discusses the interdisciplinary treatment to rehabilitate a patient with a history of surgical removal of fibromatosis. Treatment involved the use of osseointegrated implants to facilitate orthodontic correction of an underlying malocclusion. The implants were subsequently used in the prosthodontic rehabilitation of the residual surgical defect.

Albright hereditary osteodystrophy: a rare case report.

Albright hereditary osteodystrophy (AHO) is a rare hereditary metabolic disorder that may be associated with or without resistant to parathyroid hormone (pseudohypoparathyroidism). It is commonly characterized by a constellation of physical features of short stature, round face, short neck, and small metacarpals and metatarsals, mild mental retardation, osteoporosis, subcutaneous calcification, and sometimes olfactory and hearing functional defect. Hypocalcaemia and hyperphosphatemia are the most important manifestations of the case. We report a clinical case of siblings with AHO with reduced Gs-alpha activity and we discuss their clinical features with oral manifestations, radiographic findings, laboratory tests along with treatment.