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Updated: Aug 10, 2026
A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
Published on: January 28, 2020
Five-year skeletal and dental stability following bilateral sagittal split osteotomy for mandibular advancement in
Tan Hung Le1, Duc Lanh Le2, Ai Khiem Tran2
1Faculty of Odonto - Stomatology, College of Medicine and Pharmacy, Tra Vinh University, Tra Vinh Province, Viet Nam.
Background:
Bilateral sagittal split osteotomy (BSSO) is widely used for mandibular advancement in patients with skeletal Class 2 malocclusion; however, long-term postoperative stability remains an important clinical concern.
Purpose:
To evaluate long-term skeletal, dentoalveolar, and soft tissue stability following mandibular advancement with BSSO and rigid fixation.
Methods:
A retrospective cohort study was conducted in 32 patients undergoing mandibular advancement with BSSO and rigid fixation. Cephalometric measurements were obtained at four time points: preoperative, immediate postoperative, 12 months, and long-term follow-up (>3 years). Changes were analyzed using the Wilcoxon signed-rank test.
Results:
The mean mandibular advancement was 5.42 ± 1.71 mm. Immediately after surgery, significant skeletal correction was achieved, with increased SNB and decreased ANB (both p < 0.001), accompanied by significant improvements in occlusal and soft tissue profile measurements. Most skeletal and occlusal parameters remained stable during the first postoperative year and throughout long-term follow-up, with no statistically significant changes observed between one year and the final evaluation. Soft tissue remodeling continued during follow-up, whereas overall skeletal and dental stability was maintained.
Conclusion:
Bilateral sagittal split osteotomy with rigid fixation effectively corrected skeletal Class 2 malocclusion and demonstrated favorable long-term skeletal, dental, and soft tissue stability.
