Three-dimensional skeletal and dentoalveolar sagittal and vertical changes associated with cantilever Herbst appliance in prepubertal patients with Class II malocclusion.

Sangalli, Kamilla Leonardo; Dutra-Horstmann, Kamile Leonardi; Correr, Gisele Maria; Topolski, Francielle; Flores-Mir, Carlos; Lagravère, Manuel O; Moro, Alexandre

Sangalli, Kamilla Leonardo; Dutra-Horstmann, Kamile Leonardi; Correr, Gisele Maria; Topolski, Francielle; Flores-Mir, Carlos; Lagravère, Manuel O; Moro, Alexandre.

Afiliação

Sangalli KL; School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Curitiba, Paraná, Brazil.
Dutra-Horstmann KL; Oncology Research Centre, Florianopolis, Santa Catarina, Brazil.
Correr GM; School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Curitiba, Paraná, Brazil.
Topolski F; School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Curitiba, Paraná, Brazil.
Flores-Mir C; School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
Lagravère MO; School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
Moro A; School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Department of Orthodontics, Federal University of Paraná, Curitiba, Paraná, Brazil. Electronic address: alexandremoro@uol.com.br.

Am J Orthod Dentofacial Orthop ; 161(5): 638-651.e1, 2022 May.

Article em En | MEDLINE | ID: mdl-35016812

RESUMO

INTRODUCTION: This study aimed to assess sagittal and vertical skeletal and dentoalveolar changes through the use of 3-dimensional imaging in prepubertal Class II malocclusion patients treated with a cantilever Herbst appliance (HA). Condyle-glenoid fossa positional changes were also quantified. METHODS: This retrospective cohort study assessed 22 children (11.2 years ± 1.2) consecutively treated with a cantilever HA for 12 months and 11 untreated children (aged 9.3 ± 0.30 years) that served as controls. Cone-beam computed tomography was performed at baseline (T1) and at the end of the observation period (T2). Movements in the regions of interest were measured as linear displacements from cone-beam computed tomography images through algebraic calculations. A Student t test for independent samples was used for group equivalence testing at T1, and the treatment differences between T2 and T1 were evaluated by 2 analyses of covariance, one considering the expected growth unit as a covariate and the other with an annualized factor. RESULTS: The largest dental movement was a mesial movement of mandibular molars (3.70 mm), whereas the largest skeletal changes consisted of a larger relative length of the mandible (difference of 1.2 mm) in the HA group than in the control group. CONCLUSIONS: Within the study limitations (retrospective cohort, historical control group, and sample size), 3-dimensional imaging suggests that HA corrected Class II malocclusion in a predominantly prepubertal sample through more dental than skeletal changes. The changes were more significant in the sagittal than in the vertical direction. In addition, relative stability in the condyle-fossa relationship was noted.

Assuntos

Má Oclusão Classe II de Angle; Aparelhos Ortodônticos Funcionais; Cefalometria; Criança; Humanos; Má Oclusão Classe II de Angle/diagnóstico por imagem; Má Oclusão Classe II de Angle/terapia; Mandíbula; Estudos Retrospectivos

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Aparelhos Ortodônticos Funcionais / Má Oclusão Classe II de Angle Tipo de estudo: Observational_studies / Risk_factors_studies Limite: Child / Humans Idioma: En Revista: Am J Orthod Dentofacial Orthop Assunto da revista: ODONTOLOGIA / ORTODONTIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

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