Mandibular ramus split patterns following sagittal split ramus osteotomy - evaluation with multifactorial risk...

Area of Science:

• Oral and Maxillofacial Surgery
• Orthognathic Surgery
• Anatomical Risk Factors

Background:

• Sagittal split ramus osteotomy (SSRO) is a common procedure for correcting mandibular deformities.
• Split patterns, both buccal and lingual, can lead to complications.
• Identifying risk factors is crucial for improving surgical outcomes.

Purpose of the Study:

• To identify novel risk factors influencing buccal and lingual split patterns in SSRO.
• To analyze the association between mandibular ramus anatomy and split patterns.
• To provide insights for preventing SSRO complications.

Main Methods:

• Retrospective cohort study of 658 SSRO cases using the Hunsuck technique.
• Analysis of demographic and mandibular anatomical factors as predictors.
• Classification of split patterns as outcome variables.

Main Results:

• Posterior ramus length and buccal horizontal osteotomy (BHO)-buccal type significantly correlated with buccal bad splits.
• Younger age, male gender, wider transverse ramus width, and BHO-buccal type were associated with long lingual splits.
• Shorter posterior ramus length and BHO-lingual type linked to short lingual splits.

Conclusions:

• Buccal and lingual split patterns are influenced by patient demographics and mandibular anatomy.
• While some factors are uncontrollable (e.g., age, gender), BHO type is modifiable.
• Identified risk factors aid surgeons in patient evaluation and treatment planning to prevent SSRO complications.