Bilateral sagittal split osteotomies and mandibular distraction osteogenesis: a randomized controlled trial comparing...

Area of Science:

• Oral and Maxillofacial Surgery
• Orthognathic Surgery
• Craniofacial Reconstruction

Background:

• Mandibular hypoplasia presents challenges in achieving adequate skeletal advancement.
• Bilateral sagittal split osteotomy (BSSO) and mandibular distraction osteogenesis (MDO) are common surgical techniques for mandibular advancement.
• Assessing the long-term skeletal stability of these procedures is crucial for treatment outcomes.

Purpose of the Study:

• To compare the skeletal stability of BSSO versus MDO in patients with moderate mandibular hypoplasia.
• To evaluate horizontal and vertical skeletal relapse following these surgical advancements.

Main Methods:

• A randomized controlled trial involving 14 patients with Class II mandibular hypoplasia.
• Patients underwent either BSSO or MDO for 6-10 mm mandibular advancement.
• Serial lateral cephalographs were analyzed at multiple postoperative time points up to 12 months.

Main Results:

• No statistically significant differences in horizontal or vertical skeletal relapse were observed between the BSSO and MDO groups.
• Both techniques demonstrated comparable skeletal stability at all assessed postoperative intervals.

Conclusions:

• BSSO and MDO exhibit similar skeletal stability for mandibular advancements of 6-10 mm.
• While MDO showed a trend towards less relapse, statistical significance was not achieved.
• Patient-specific factors should guide the choice between BSSO and MDO.