Is there any difference in the condylar position and angulation after asymmetric mandibular setback?
OBJECTIVE
This study was performed to compare the condylar position and angulation on 3-dimensional (3D) views between greater setback side (GSS) and lesser setback side (LSS) after asymmetric mandibular setback (AMS) using computed tomography.


METHODS
The sample consisted of 12 Korean skeletal class III malocclusion patients with mandibular prognathism and facial asymmetry, who underwent sagittal split ramus osteotomy (SSRO) with rigid fixation. Tomographs were taken 1 month before (T1) and 6 months after surgery (T2). Position and angulation of the condyles were measured.


RESULTS
At T1 stage, the condylar head in GSS showed more forward inclination on the sagittal view (P < .05) than that of LSS. Although there were significant inward and backward rotations of the condylar head in GSS (P < .01) and significant backward rotation in LSS at T2 stage (P < .05), 3D positions of the condyle in GSS and LSS were not changed after AMS.


CONCLUSIONS
SSRO might be effective to stabilize the condylar position for AMS.
Baek
Seung-Hak
SH
Department of Orthodontics, School of Dentistry, Dental Research Institute, Seoul National University, Seoul, South Korea.
Kim
Tae-Kyung
TK
Kim
Myung-Jin
MJ
D000293:Adolescent; D000328:Adult; D002508:Cephalometry; D005146:Facial Asymmetry / Q000000981:diagnostic imaging / Q000601:surgery*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008334:Mandible / Q000601:surgery*; D008335:Mandibular Condyle / Q000000981:diagnostic imaging / Q000473:pathology*; D019647:Oral Surgical Procedures; D010027:Osteotomy; D011378:Prognathism / Q000601:surgery*; D011861:Radiography, Dental; D055502:Secondary Prevention; D014057:Tomography, X-Ray Computed; D019415:Torque