J Korean Assoc Oral Maxillofac Surg.  2008 Dec;34(6):628-634.

The evaluation of reproducibility of operation plan with the comparison between STO and post-operative jaw position in orthognathic surgery

• Kwon SW
• Jee YJ
• Lee BS
• Lee DW

Abstract

The purpose of this study is to examine reproducibility of operation plan and 3-dimentional jaw movement patterns by comparing jaw position of STO with post-operative jaw position. Twenty patients with class III dental and skeletal malocclusion who were treated with Le-Fort I osteotomy and B-SSRO were reviewed. Lateral cephalometric radiographs were taken within two weeks before operation and two days after operation. Cephalometric radiographs were compared and analyzed with orthognathic computer program 'V-Ceph(TM)'. Post-operative maxillary advancement was insufficient compared to maxillary advancement through STO. Post-operative setback movement was over compared to mandibular setback movement through STO. But statistically this is not significant. Maxillary vertical location is insignificant on the whole. Especially post-operative maxillary clockwise rotation is significant compared to maxillary rotation through STO. Post-operative maxillary clockwise rotation tendency is generally observed in all patients. So surgeons and staffs must consider this tendency when operation plan is established ans operation is being performed. Using intra or extra oral marking points, face bow, and bite plate will make exact surgery possible.

Keyword

Orthognathic surgery; Reproducibility of operation plan; STO; Post-operative jaw position

MeSH Terms

Bites and Stings
Humans
Jaw
Malocclusion
Orthognathic Surgery
Osteotomy
Software