Republic of Korea
Main Instructor Jin-Hyoung Cho
Department / Institution Department of Orthodontics, School of Dentistry, Chonnam National University
Classification Research report
Materials and methods: The subjects consisted of facial asymmetry who underwent mandibular setback surgery and had cone-beam computed tomography (CBCT) taken before and about 1 month after surgery. They were allocated into conventional and surgery-first groups. Position of condyles was measured.
Results: The amounts of condylar displacement did not show statistically significant differences between the conventional and surgery-first groups. Comparing the postoperative condylar position with the preoperative position, the condylar displacement occurred in the posterior (P < .05) and downward (P < .01) directions in both groups except on the deviated side in the conventional group. The condylar displacement occurred in the posterior (P < .01) direction in the deviated side of conventional group. However, the condylar displacement in the three-directions did not show statistically significant differences between two groups. In the correlation analysis, the condylar displacement in both deviated and contralateral side did not show significant correlation with asymmetric setback in each two groups.
Conclusion: In the surgery-first group, the amount of condylar displacement in asymmetric mandibular setback patients did not show difference from the conventional group.
CBCT Evaluation on Condylar Displacement After Orthognathic Surgery: Comparison Between Conventional and Surgery- First Approach