J Korean Assoc Maxillofac Plast Reconstr Surg.  2011 Jul;33(4):319-322.

Evaluation of Relapse according to Set-back Degree of the Mandible at Bilateral Sagittal Split Ramus Osteotomy in Mandibular Prognathism Patients

• Yoo KH
• Kim SG
• Moon SY
• Oh JS
• Kim SG
• Park JJ
• Jung JW
• Yoon DW
• Yang SS

Abstract

PURPOSE
The purpose of this study was to examine the appropriate degree of set-back of the mandible by evaluating the rate of relapse after surgery.
METHODS
Among the patients who visited our hospital from January 2002 to January 2007 and who underwent orthognathic surgery, of the patients available for follow-up observation, the rate of relapse after surgery was investigated according to the set-back degree. The patients were divided into groups by the degree of set-back, and relapse was evaluated by the radiographs performed the day after surgery, 6 months after surgery, 1 year after surgery, 2 years after surgery and 3 years after surgery.
RESULTS
In cases that exceeded the limit of posterior movement of the mandible (13 mm) or that had the wrong position of the condyle, a greater tendency toward relapse was shown.
CONCLUSION
Based on the results of this study, among the cases that required a large amount of posterior movement of the mandible, two jaw surgeries accompanied by bilateral sagittal split ramus osteotomy (BSSRO) and LeFort I osteotomy are recommended.

Keyword

Complication; Orthognathic surgery; Sagittal split ramus osteotomy

MeSH Terms

Follow-Up Studies
Humans
Mandible
Orthognathic Surgery
Osteotomy
Osteotomy, Sagittal Split Ramus
Prognathism
Recurrence