Evaluation of condylar surface CT values related to condylar height reduction after orthognathic surgery

This study was performed to evaluate the relationship between condylar height reduction and changes in surface computed tomography (CT) values jaw deformity patients following orthognathic surgery. Mandibular advancement by sagittal split ramus osteotomy (SSRO) with Le Fort I class II patients, mandibular setback SSRO III patients. The maximum CT (pixel values) at five points on height, square, angle, gonial angle plane were measured preoperatively 1 year postoperatively. Disc position classified as anterior disc displacement (ADD) or other types using magnetic resonance imaging (MRI). Ninety-two condyles of 46 female prepared for this study. Their temporomandibular joints (TMJs) divided into two groups based (46 III) findings (25 ADD 67 findings). without observed group 23 group. distribution incidence had not changed after Condylar decreased surgery both (mandibular advancement) (p < 0.0001) setback) = 0.0306). Similarly, who showed 0.0087) those 0.0023). Significant postoperative increases all sites found 0.05) groups. that an enhanced value might be one sign related sequential resorption, combination ADD.