Stability After Bilateral Sagittal Split Osteotomy With Rigid Internal Fixation in Surgery-First Approach

作者：Kwon Young Wook; Bayome Mohamed; Park Je Uk^*

来源：Journal of Oral and Maxillofacial Surgery, 2016, 74(4): 828.e1.

DOI：10.1016/j.joms.2015.11.031

Purpose: The purpose of this study was to evaluate the stability of bilateral sagittal split ramus osteotomy (BSSO) setback with rigid internal fixation in a surgery-first approach (SFA) for patients with skeletal Class III malocclusion.
Patients and Methods: Twenty-seven consecutive patients with skeletal Class III malocclusion treated with BSSO with the SFA were included in the study. Lateral cephalograms were taken and traced before surgery and 1 and 6 months after surgery. Cephalometric measurements were compared using repeated-measures analysis of variance. A P value less than or equal to .05 was considered significant.
Results: The study included 9 men (age, 25.7 +/- 2.9 yr) and 18 women (age, 26.6 +/- 4.2 yr). Treatment time was 8.4 +/- 1.5 months. Horizontally, there were no meaningful anteroposterior changes of the pogonion and B point during the postsurgical period (0.9 and 0.6 mm, respectively). Vertically, the pogonion showed superior movement after surgery (2.4 mm) without major postsurgical change (0.6 mm). The B point showed major superior movement after surgery (2.3 mm) and during the postsurgical period (1.2 mm). The inclination of the lower incisor was increased labially during the postsurgical period (2.4 degrees), although this was not statistically important.
Conclusions: In the present study, there was no major horizontal relapse for any variable (<1 mm). Vertically, all variables showed no meaningful changes during the postsurgical period except the B point showed 1.2 mm of superior displacement. BSSO with rigid fixation using the SFA seems to be an effective and predictable procedure in patients with skeletal Class III malocclusion.

• 出版日期2016-4