Soo-Bum An1, Soo-Byung Park, Yong-Il Kim, Woo-Sung Son. 1. a Postgraduate student, Department of Orthodontics, School of Dentistry, Pusan National University Dental Hospital, Yangsan, South Korea.
Abstract
OBJECTIVE: To evaluate the effect of postoperative condylar axis changes on mandibular condylar remodeling by comparing the condylar head in three-dimensional (3D) surface reconstructions before and after surgery in skeletal Class III deformities (one-jaw [mandibular setback] or two-jaw surgery), and also to determine the relationship between condylar inward rotation and condylar surface remodeling after orthognathic surgery. MATERIALS AND METHODS: A retrospective analysis was conducted of 30 patients with skeletal Class III deformities who had received orthognathic surgery. Group 1 underwent one-jaw surgery (10 men, five women, age 22.4 ± 3.3 years), and group 2 underwent two-jaw surgery (10 men, five women, age 22.3 ± 2.2 years). Sixty condyles were reconstructed and superimposed pre- and postoperatively to compare the changes of condylar surfaces. The relation between the condylar axis change and the surface change using the Pearson correlation were investigated from the 3D image software. RESULTS: Condylar surface changes before and after the surgery were significant. The postoperative inward rotation of the condyles was correlated with the average absolute deviation of the condyles, regardless of the surgery type (one- or 2-jaw surgery; r = .70, P < .05). CONCLUSION: After orthognathic surgery, condylar surface changes occurred, and condylar inward rotation was closely related to changes of condylar surface.
OBJECTIVE: To evaluate the effect of postoperative condylar axis changes on mandibular condylar remodeling by comparing the condylar head in three-dimensional (3D) surface reconstructions before and after surgery in skeletal Class III deformities (one-jaw [mandibular setback] or two-jaw surgery), and also to determine the relationship between condylar inward rotation and condylar surface remodeling after orthognathic surgery. MATERIALS AND METHODS: A retrospective analysis was conducted of 30 patients with skeletal Class III deformities who had received orthognathic surgery. Group 1 underwent one-jaw surgery (10 men, five women, age 22.4 ± 3.3 years), and group 2 underwent two-jaw surgery (10 men, five women, age 22.3 ± 2.2 years). Sixty condyles were reconstructed and superimposed pre- and postoperatively to compare the changes of condylar surfaces. The relation between the condylar axis change and the surface change using the Pearson correlation were investigated from the 3D image software. RESULTS: Condylar surface changes before and after the surgery were significant. The postoperative inward rotation of the condyles was correlated with the average absolute deviation of the condyles, regardless of the surgery type (one- or 2-jaw surgery; r = .70, P < .05). CONCLUSION: After orthognathic surgery, condylar surface changes occurred, and condylar inward rotation was closely related to changes of condylar surface.
Authors: Alexandre Trindade Simões da Motta; Felipe de Assis Ribeiro Carvalho; Ana Emília Figueiredo Oliveira; Lúcia Helena Soares Cevidanes; Marco Antonio de Oliveira Almeida Journal: Dental Press J Orthod Date: 2010-03-01
Authors: Felipe de Assis Ribeiro Carvalho; Lucia Helena Soares Cevidanes; Alexandre Trindade Simões da Motta; Marco Antonio de Oliveira Almeida; Ceib Phillips Journal: Am J Orthod Dentofacial Orthop Date: 2010-04 Impact factor: 2.650