A simplified sagittal split osteotomy of the mandibular ramus: A single-cut approach for orthognathic surgery

This study aims to evaluate the feasibility, and reliability of a novel simplified sagittal osteotomy (SSO) technique for mandibular repositioning in orthognathic surgery. The research question focuses on whether this approach can reduce technical complexity and complication rates, especially in a residency training environment.

A prospective observational study was conducted involving 118 patients (62 females, 56 males) diagnosed with Angle Class II or III malocclusions and indicated for orthognathic surgery. All patients underwent a novel mandibular osteotomy as part of a Double-jaw surgery. Exclusion criteria included patients under 18 years of age, third molar presence, mandibular pathologies, and incomplete follow-up. The primary outcomes included feasibility, complication rates, and the need for conversion to the conventional BSSO. Statistical analysis was performed using the Chi-square test.

A total of 236 osteotomies were performed. The technique was considered feasible in 98.7% of cases, with no conversions to traditional BSSO. No bad splits occurred. IAN injury was observed in 0.8% of cases, and long-term paresthesia (>1 year) occurred in 1.2%. No cases of hemorrhage or dental injury were reported. No significant associations were found between complications and patient gender or deformity type (p>0.05).

The SSO technique demonstrated high feasibility and a low complication profile, supporting its use as a reliable alternative to BSSO.