The aim of this study is to show positional changes of the mandibular condylar axis after backward or centering movements in skeletal class III patients.

The anatomy of the body of the mandible is an image like an oval where the thinnest part is the symphysis area and the gonion is the region that has the greater diameter.

The backward movement of the mandible during a Sagittal Ramus Split Osteotomy produces a difference between the transverse measures of the gonion and the symphysis. If a correct manipulation of the condylar segment is carried out, the lateral and vertical position of the condyle should be maintained with mini plate fixation. The vertical changes of de condyle provoke autorotational mandibular movement, and the lateral movements can change the condylar axis.

In the present study, the changes in the condylar axis of five patients in which a backward movement of the mandible was done will be presented. The presurgical and postsurgical cephalometric study, as well as a protocol for the study of these patients will be shown.

Conflict of interest: The main author belongs to the maxillofacial surgery navigation commission.