A Prospective Study on Relapse Following Bilateral Sagittal Split Osteotomy in Mandibular Set Back Approach

Area of Science:

• Orthognathic surgery
• Oral and maxillofacial surgery
• Skeletal stability

Background:

• Bilateral sagittal split osteotomy (BSSO) is a common procedure for correcting mandibular deformities.
• Skeletal relapse is a frequent complication following BSSO, impacting surgical outcomes.

Purpose of the Study:

• To evaluate skeletal stability after BSSO with mandibular setback.
• To assess the efficacy of rigid internal fixation using bilateral four-hole titanium miniplates in preventing relapse.

Main Methods:

• A cohort of nine patients with skeletal class III malocclusions underwent BSSO and mandibular setback.
• Rigid internal fixation was achieved using one four-hole titanium miniplate bilaterally.
• Skeletal relapse was monitored at one week, three months, and six months post-surgery.

Main Results:

• No significant pogonion relapse was observed in any patient.
• Mild increases in posterior and anterior facial height were noted in three patients.
• The fixation method demonstrated effective skeletal stability.

Conclusions:

• Bilateral sagittal split osteotomy (BSSO) with mandibular setback, stabilized by bilateral four-hole titanium miniplates, results in low skeletal relapse.
• This fixation technique offers a stable solution for orthognathic surgery in class III malocclusions.