Prevalence of condylar morphological changes in individuals with class II malocclusion.

This observational, cross-sectional study with retrospective collection was aimed to evaluate the prevalence of morphological changes in mandibular condyles in individuals with class II malocclusion, classified according to different vertical growth patterns (brachyfacial, mesofacial, and dolichofacial), through cone beam computed tomography (CBCT). Seventy CBCT images (140 mandibular condyles) were selected from individuals without orthodontic treatment, of both sexes, aged between 25 and 50 years. No statistically significant differences were found between facial patterns; however, there was a higher relative prevalence of bone changes in dolichofacial individuals with flattening (62%), sclerosis (44%), and subchondral bone cyst (20%). Erosion and osteophytes prevailed in mesofacial (39%), and brachyfacial individuals (32%), respectively. Thus, there was no statistically significant difference in the prevalence of degenerative changes between the vertical skeletal patterns. Flattening was the most prevalent change, whereas subchondral bone cyst was the least prevalent among the three groups studied. The observational design of this study makes it possible to analyze image banks to verify the correlation of morphological changes in the temporomandibular joint in different facial patterns in patients with class II malocclusion. A limitation of the study is that clinical characteristics were not evaluated.

Prevalence of condylar morphological changes in individuals with class II malocclusion

Abstract This observational, cross-sectional study with retrospective collection was aimed to evaluate the prevalence of morphological changes in mandibular condyles in individuals with class II malocclusion, classified according to different vertical growth patterns (brachyfacial, mesofacial, and dolichofacial), through cone beam computed tomography (CBCT). Seventy CBCT images (140 mandibular condyles) were selected from individuals without orthodontic treatment, of both sexes, aged between 25 and 50 years. No statistically significant differences were found between facial patterns; however, there was a higher relative prevalence of bone changes in dolichofacial individuals with flattening (62%), sclerosis (44%), and subchondral bone cyst (20%). Erosion and osteophytes prevailed in mesofacial (39%), and brachyfacial individuals (32%), respectively. Thus, there was no statistically significant difference in the prevalence of degenerative changes between the vertical skeletal patterns. Flattening was the most prevalent change, whereas subchondral bone cyst was the least prevalent among the three groups studied. The observational design of this study makes it possible to analyze image banks to verify the correlation of morphological changes in the temporomandibular joint in different facial patterns in patients with class II malocclusion. A limitation of the study is that clinical characteristics were not evaluated.

Avaliaçao e comparaçäo da eficácia de três tipos diferentes de escovas dentais associadas a outros recursos de controle de placa bacteriana em pacientes submetidos ao tratamento ortodontico corretivo / Evaluation and comparison of the effectiveness of three different types of toothbrushes associated with other means of plaque control in patients undergoing corretive orthodontic treatment

A finalidade do presente estudo foi avaliar a eficácia de três tipos diferentes de escovas dentais e, do uso do fio dental e da soluçäo de cloreto de cetilpiridínio 0,05 por cento como coadjuvantes no controle da placa bacteriana em pacientes usuários da aparelhagem ortodontica fixa. Formaram-se 3 grupos experimentais que usavam respectivamente escovas Kolynos doctor cabeça compacta (KCC), Kolynos master macia (KMM); e Kolynos doctor flexível (KF)e, 1 grupo controle (C) que usavam qualquer escova dental diferente das três mencionadas anteriormente. Cada grupo foi constituído por 14 pessoas. A pesquisa constatou de 4 sessöes com intervalos de 10 dias. Na primeira sessäo, instruiu-se apenas a escovaçäo; na segunda, acrescentou-se o uso do fio dental, na terceira, adicionou-se o antisséptico bucal além dos meios mecânicos e a quarta sessäo serviu para o controle final. Os indivíduos do grupo controle apenas realizavam escovaçäo durante todos os períodos de estudo. Em cada sessäo, coletou-se os escores dos índices gengival e da placa, e estes valores foram transformados em médias. Além disso, efetuou-se a análise de variância aplicando o teste F, pelo grograma SAS. Clinicamente todos os grupos apresentaram médias de índice gengival similares. Com relaçäo às médias dos índice de placa, o grupo que usou escova KCC mostrou um comportamento mais favorável, iniciando com média 3,08 e terminado com 1,73; os grupos que usavam escova KMM ou KF tiveram resultados parecidos; já o grupo controle mostrou uma tendência à estabilizaçäo a partir da terceira sessäo. Embora havendo diferenças clínicas, estas näo foram estatisticamente significantes. Concluiu-se diante dos métodos adotados que todas as escovas foram eficientes