The long-term stability of dentition in skeletal class III malocclusion following orthodontic-orthognathic surgery.

OBJECTIVE

To Investigate the changes in dentition at each treatment stage and to get some guidelines for clinical work.

METHODS

Thirty-one cephalometric films of skeletal class III malocclusion patients were analyzed. All the patients were treated by orthodontic and orthognathic surgery.

RESULTS

During presurgical orthodontic treatment, the lower Incisors were decompensated (labially Proclined by 7 degrees ). The upper incisors were uprighted during surgery following rotation of maxilla. After surgery, the upper anterior teeth kept tipping for ward. While the lower anterior teeth were In stable. The dentition was in good occlusion during observing stage.

CONCLUSIONS

Lingually tipped lower Incisors were decompensated after presurgical orthodontic treatment in class III malocclusion patients, and lower Incisors kept in stable during observing stage, while the upper incisor had a little bit relapse.