Journal of Maxillofacial and Oral Surgery

, Volume 13, Issue 4, pp 471–477

Skeletal Relapse After Mandibular Setback in Bi Max Surgery: Intraoral Vertical Ramus versus Bilateral Sagittal Split Osteotomies

Authors

    • Oral and Maxillofacial Surgery Department, Faculty of DentistryAl-Rafidain University College
    • Oral and Maxillofacial Surgery DepartmentAL-Yarmuk Teaching Hospital
  • Moutaz Al-Khen
    • Oral and Maxillofacial Surgery DepartmentDamascus Hospital, Ministry of Health
Research Paper

DOI: 10.1007/s12663-013-0555-y

Cite this article as:
Al-Delayme, R.M.A. & Al-Khen, M. J. Maxillofac. Oral Surg. (2014) 13: 471. doi:10.1007/s12663-013-0555-y

Abstract

Objectives

This study aimed to measure and compare the postoperative horizontal and vertical changes (relapse) that occur at B point and pogonion after intraoral vertical ramus osteotomy (IVRO) without fixation and bilateral sagittal split osteotomy (BSSO) with semi rigid internal fixation in bimax surgery.

Materials and Methods

Eleven patients with skeletal class III malocclusion mandibular prognathism and maxillary hypoplasia were chosen. Six cases underwent BSSO; and five IVRO. All patients underwent Lefort I osteotomy without genioplasty.

Result

Postoperative changes (relapse) of B-point and pogonion in horizontal and vertical axes from 1 week post operatively (T0) to 1 year post operatively (T2) were assessed and the percentage of relapse of each point and each axis was compared. It was noted that the horizontal relapse in IVRO was 27.7 % at B point and 40.6 % at pogonion while, in BSSO group it was noted that the horizontal relapse was 28.1 % at B point and a greater number i.e., 40.9 % at pogonion.

Conclusion

The percentage of horizontal relapse after IVRO without fixation is equal to that after BSSO with semi rigid internal fixation.

Keywords

Relapse B point Pogonion Vertical ramus osteotomy (IVRO) Bilateral sagital split osteotomy (BSSO)

Copyright information

© Association of Oral and Maxillofacial Surgeons of India 2013