[Three-dimensional assessment of positional changes of the mandibular condyles following orthognathic surgery].

The aim the study: This study aims to assess the postoperative condylar displacement after orthognathic surgery using three-dimensional analysis of computed tomography.

Material and methods: This retrospective study included 64 condyles from 32 patients with skeletal Class II (Group 1, n=16) and III (Group 2, n=16) deformities. All patients underwent a bimaxillary surgery. The three-dimensional CT images were evaluated to assess condylar displacement.

Results: The condyle exhibited mainly superior and lateral torque immediately after surgery. Posterior displaced condyles were found in two cases in group 1 (Class II malocclusion).

Conclusion: The present study found the condyle displacement that can be mistaken as posterior displacement of condyle in analysis of sagittal sections of CT scans.