The assessment of the short- and long-term changes in the condylar position following sagittal split ramus osteotomy (SSRO) with rigid fixation.
The purpose of this study was to compare the short- and long-term changes in condylar position related to the glenoid fossa, and skeletal and occlusal stability after orthognathic surgery. All of the study patients were assessed by cone-beam computed tomography images for condylar rotational changes and anteroposterior position in the pre-surgery, post-surgery and post-retention period. The condylar positions were evaluated on three planes: axial, coronal and sagittal. In the skeletal and occlusal measurements, there was no significant difference between the post-surgery group and the post-retention group. After sagittal split ramus osteotomy (SSRO), the condyle on the axial plane rotated inward (P < 0.05) and maintained during the post-retention period. In the anteroposterior condylar position related to the glenoid fossa, the condyles had changed from the anterior position in the pre-surgery group to a concentric position in the post-surgery group and then returned to the anterior position in the post-retention groups. These results suggested that the changed anteroposterior condylar position in the glenoid fossa after SSRO with rigid fixation had moved from a concentric to anterior position for post-retention period.
Kim
Y-I
YI
Department of Orthodontics, Pusan National University, Busan, South Korea.
Jung
Y-H
YH
Cho
B-H
BH
Kim
J-R
JR
Kim
S-S
SS
Son
W-S
WS
Park
S-B
SB
D000222:Adaptation, Physiological; D000328:Adult; D016723:Bone Remodeling / Q000502:physiology*; D002508:Cephalometry; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D019248:Jaw Fixation Techniques; D008137:Longitudinal Studies; D008297:Male; D008334:Mandible / Q000002:abnormalities / Q000033:anatomy & histology / Q000601:surgery*; D008335:Mandibular Condyle / Q000033:anatomy & histology* / Q000502:physiology; D056948:Orthognathic Surgical Procedures / Q000379:methods; D010027:Osteotomy; D011378:Prognathism / Q000601:surgery*; D012008:Recurrence; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D013704:Temporomandibular Joint / Q000033:anatomy & histology* / Q000502:physiology; D016896:Treatment Outcome; D055815:Young Adult