Maxillofacial Features Related to Mandibular Asymmetries in Skeletal Class III Patients

Relación Transversal, Vertical y Sagital en Sujetos con Deformidad Facial Candidatos a Cirugía Ortognática

“…Nuestros datos concuerdan con varios autores (Bayome et al, 2013;Thiesen et al, 2017a;Leung & Leung, 2018) quienes observaron una correlación entre la medición transversal de la cara con la longitud vertical facial. La asimetría facial en sujetos con clase III esqueletal era mayor que en los sujetos clase II, siendo el componente mandibular el que presentar mayor implicancia en el biotipo facial.…”

Surgical-Orthodontic Diagnosis and Treatment Planning in an Asymmetric Skeletal Class III Patient—A Case Report

“…Facial asymmetry can manifest as a part of disharmony of the craniofacial complex, altering the proportions between the facial thirds [4], having skeletal, dental, and soft tissue involvement [5]. According to Thiesen et al, the prevalence of facial asymmetry varied from 11 to 37% [6], being 61% more prevalent in skeletal Class III patients [7] than skeletal Class II [4].…”

“…The etiology is not entirely known, but several genetic and environmental risk factors are identified [4,5]. Most cases of facial asymmetry have a mandibular origin, resulting in a deviation of the lower third of the face [6]. Additionally, the mandible has a longer growth period, which increases the probability of being more affected than other structures.…”

Evaluation of natural mandibular shape asymmetry: an approach by using elliptical Fourier analysis

“…In order to carry out a system accessible to the low-income Latin American population, that also has a proper mandibular morphology to the actual craniofacial conformation of the patient, it is proposed to employ two-dimensional elements such as analysis in panoramic radiographs to be extrapolated in a three-dimensional view. Approaches in prediction in other types of radiographs have been made in terms of size and position; 1,[4][5][6][7] however from a posteroanterior view according to a previous study, 8 a discrepancy could be observed between the left and right side prediction coefficients, with an important influence of the mandibular shape.…”

“…As a first step to achieve the model of two-dimensional to three-dimensional prediction, it is important to know if it is necessary to make the mandibular prediction of the left side separately from the right side or as a single component, that is, to observe if natural asymmetry is a factor linked to the mandibular shape and is not a size feature, as reported in several studies. 5,7,12,13 Also other factors such as sexual dimorphism and skeletal classes linked to asymmetry could influence the mandibular shape. The foregoing analysis could confirm one hypothesis established in the mentioned study about that the asymmetry affects the general mandibular prediction.…”