Condylar resorption and functional outcome after unilateral sagittal split osteotomy.

Objective: The objective of this study was to evaluate the radiological and functional results of unilateral sagittal split osteotomy (USSO) of the mandible.

Study Design: Between January 2001 and December 2008, 26 patients underwent USSO to correct laterognathia (isolated USSO in 3 patients and Le Fort I osteotomies in combination with USSO in 23 patients). Radiographs of 23 patients were evaluated for signs of condylar resorption or loss of ramus height; 16 patients were clinically examined and the movement of both condyles was measured with a nontouch device.