Evaluation of Mandibular Setback After Bilateral Sagittal Split Osteotomy With the Hunsuck Modification and Miniplate Fixation

Yang, Xue-Wen; Long, Xing; Yeweng, San-Jie; Kao, Chia-Tze

doi:10.1016/j.joms.2006.11.022

« Previous Next »Journal of Oral and Maxillofacial Surgery
Volume 65, Issue 11 , Pages 2176-2180, November 2007

Evaluation of Mandibular Setback After Bilateral Sagittal Split Osteotomy With the Hunsuck Modification and Miniplate Fixation

Xue-Wen Yang, PhD
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Wuhan University and Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Wuhan University, Wuhan, China.
Xing Long, PhD
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Wuhan University and Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Wuhan University, Wuhan, China.
San-Jie Yeweng, PhD
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Wuhan University and Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Wuhan University, Wuhan, China.
Chia-Tze Kao, PhD
- Institute of Oral Material Science, Chung Shan Medical University; Orthodontic Department, Chung Shan Medical University Hospital, Taichung, Taiwan.
- Address correspondence and reprint requests to Dr Kao: Institute of Oral Material Science, Chung Shan Medical University, Taiwan 110, Section 1, Chien Kuo North Road, Taichung, Taiwan

Purpose

This study was conducted to evaluate neurosensory disturbances (NSDs) and jaw movement after bilateral sagittal split osteotomy (BSSO) with the Hunsuck modification and miniplate fixation to correct mandibular prognathism.

Patients and Methods

A total of 63 patients who underwent Hunsuck-modified BSSO to correct mandibular prognathism were studied. Both 3-month and 6-month postoperative Schuller’s temporomandibular joint (TMJ) views tracing the 63 patients were studied to analyze mandibular movement. The patients’ NSD and TMJ symptoms were recorded. Data were analyzed using 1-way analysis of variance.

Results

The mean TMJ was 9.6% with clicking before surgery. At the evaluation 6 months after surgery, the clicking had reduced to 3.1%. The lip neuorsensory deficit increased to 23.8% at 6 months after surgery. The jaw position measurements before and after surgery showed statistically significant differences in mouth opening and jaw advancement (P < .05). The changes in mandibular lateral movement were not statistically significant (P > .05).