The need for intermaxillary fixation in sagittal split osteotomy setbacks with bicortical screw fixation.

OBJECTIVE

The aim of this study was to decide whether use of bicortical screw fixation provides sufficient stability to dispense with intermaxillary fixation (IMF).

STUDY

DESIGN

Eighty-six patients who had undergone surgical setback of the mandible using bilateral sagittal split ramus osteotomies were examined. Group 1 (15 patients) received miniplate fixation with IMF for 6 weeks, and group 2 (71 patients) received bicortical screw fixation and immediate postoperative function. The 2 groups were evaluated radiographically for postsurgical changes of the pogonion 24 months postoperatively.

RESULTS

There was no significant difference in the magnitude of the relapse between the 2 groups over the 24-month postoperative period.

CONCLUSION

The use of bicortical screw fixation after sagittal split setback of the mandible provides sufficient stability to dispense with IMF.