J Korean Assoc Oral Maxillofac Surg.  2006 Oct;32(5):447-452.

Changes of transverse mandibular width after intraoral vertical ramus osteotomy

• Park SY
• Jung YS
• Choi YD
• Park HS

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.

Keyword

Transverse mandibular width; Intraoral vertical ramus osteotomy; Mandibular setback; Hard and soft tissue

MeSH Terms

Humans
Osteotomy*