Examination of Mandibular Morphology in Female Patients with Jaw Deformity Using Homologous Modeling Technology

Abstract

Purpose: Following the shift toward more active treatment of jaw deformity, numerous institutions have reported trends in treatment techniques and the characteristics of jawbone morphology. However, few studies of patients undergoing treatment for jaw deformity have focused on mandibular morphology, which is an important factor in determining the surgical technique used. The aim of this study was to evaluate the efficacy of the homologous modeling technique for assessing the characteristics of mandibular bone morphology in patients with jaw deformity. Materials and Methods: Admitted to the study were 62 female patients (34 jaw deformity patients, 28 patients who required extraction of wisdom teeth) who underwent computed tomography imaging of the mandible at our department between April 2019 and July 2023. Homologous modeling of the mandible was performed using reference planes and anatomical landmarks, in addition to principal component analysis (PCA). The results of PCA between the jaw deformity group and the tooth extraction group were compared using Mann-Whitney U test. Results: PCA revealed positive associations among smaller mandibular angle, increased chin protrusion, and smaller angle of the mandibular ramus relative to the occlusal plane (principal component [PC] 1 and 2). Additionally, as the chin moved to the right, the angle of the mandibular ramus relative to the occlusal plane differed between the left and right sides (PC1). Conclusions: The homologous modeling technique is a useful method for evaluating the mandibular morphology of patients with jaw deformities.journal articl