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Correspondence to Author:  Renato Dalla Porta Garcia  

Department of Orthodontics, Lutheran University of Brazil, Canoas, Rio Grande do Sul, Brazil

Abstract:

Objectives : Estimate the prevalence of mandibular asymmetries in Brazilian adolescents and investigate the demographic and skeletal factors associated to the asymmetries. Methods : Cone beam computed tomography (CBCT) images from 376 individuals aged from 10 to 19 were analysed to investigate mandibular asymmetry categorized as relative mandibular symmetry, moderate asymmetry, and severe asymmetry. Exposure variables included sex, age, side of mandibular deviation, sagittal and vertical skeletal pattern of the individuals, and cranial base angulation. The chi-square test was used to evaluate the association among asymmetry and the exposure variables. Gross prevalence rations were estimated and adjusted by Poisson regression with robust variance. Significance level was established at 5%. Results : Prevalence values were of 78.2% for relative mandibular symmetry, 14.4% for moderate asymmetry, and 7.4% for severe asymmetry. Bivariate analysis revealed that mandibular asymmetry was associated to age, sex, and side of the mandibular deviation (p=0.021, p=0.038 e p=0.000, respectively). Conclusions : The prevalence of mandibular asymmetry in Brazilian adolescents was of 21.8%, being more associated to patients of the male sex aged between 17-19 years who present mandibular deviation to the left side.

Keywords:

Facial Asymmetry, Prevalence, Cone-Beam Computed Tomography, Adolescent

Citation:

Renato Dalla Porta Garcia. Mandibular asymmetries in brazilian adolescents: prevalence and associated factors. The Journal of Clinical Medicine 2024.