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CHANGES OF TRANSVERSE MANDIBULAR WIDTH AFTER INTRAORAL VERTICAL RAMUS OSTEOTOMY  

Park, Sung-Yeon (Department of Oral and Maxillofacial Surgery, Oral Science Research Center, College of Dentistry, Yonsei University)
Jung, Young-Soo (Department of Oral and Maxillofacial Surgery, Oral Science Research Center, College of Dentistry, Yonsei University)
Choi, Young-Dal (Department of Oral and Maxillofacial Surgery, Oral Science Research Center, College of Dentistry, Yonsei University)
Park, Hyung-Sik (Department of Oral and Maxillofacial Surgery, Oral Science Research Center, College of Dentistry, Yonsei University)
Publication Information
Journal of the Korean Association of Oral and Maxillofacial Surgeons / v.32, no.5, 2006 , pp. 447-452 More about this Journal
Abstract
Purpose: In order to clarify the correlation of mandibular setback using bilateral intraoral vertical ramus osteotomy (BIVRO) and post-surgical transverse mandibular width (TMW), this study examined the pre- and postsurgical changes in hard and soft tissues of TMW and the relationship of TMW and the amount of mandibular setback. Patients and Methods: One-hundred seven patients who had undergone BIVRO were evaluated radiographically and clinically. A comparison study of the changes in hard and soft tissue after surgery in all 107 patients was performed with preoperative, 1 month, 3 month, 6 month and 1 year postoperative posteroanterio cephalograms and clinical photographs by tracing. And this changes were evaluated in parts to amounts of mandibular setback. Results: Statistically significant increases of TMW in hard and soft tissue from preoperative to postoperative 1 month were seen. TMW in hard tissue from 1 month to 1 year postopertive were gradually decreased. TMW in soft tissue was not changed uniformly but almost equal to pre-operative width. And there was no significant correlation between TMW and amount of mandibular setback. Conclusions: The results show that mandibular setback using BIVRO did not significantly influence increasing of TMW in soft tissue.
Keywords
Transverse mandibular width; Intraoral vertical ramus osteotomy; Mandibular setback; Hard and soft tissue;
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