09h30 Modification of condylar position after mandibular advancement osteotomy: a three-dimensional analysis

Background: Mandibular advancement osteotomy is a common surgical procedure used to correct skeletal Class II malocclusion. Regardless of the repositioning technique employed, the condyle should be returned to a position as close as possible to its pre-operative state, with minimal muscle stress, in order to achieve a stable occlusion. Changes in condylar position induced by this surgery may potentially lead to adverse effects on the temporomandibular joint.

Objective: The objective of this study is to evaluate modifications in condylar position after mandibular advancement osteotomy and to explore the correlation between these positional changes and several factors, such as mandibular advancement, mandibular recentering, and mandibular autorotation.

Methods: A retrospective study will be conducted on patients who have undergone mandibular advancement surgery for Class II correction. The inclusion criteria include patients over 18 years old with no history of temporomandibular joint disorders, congenital facial anomalies or maxillofacial trauma. Pre- and post-operative cone beam computed tomography scans will be analyzed using Dolphin Imaging software. Superimposition of pre- and post-operative 3D models will allow for accurate measurement of condylar changes. Statistical analyses will be performed to assess the correlation between changes in condylar position and the degree of mandibular advancement, as well as other factors.

Conclusion: This study will provide valuable insights into condylar behavior following mandibular advancement osteotomy, which may help to better understand and minimize complications associated with condylar displacement.