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Condylar resorption and functional outcome after unilateral sagittal split osteotomy.
Irina Wohlwender1, Gert Daake, Dieter Weingart
1Oral-Maxillofacial Surgery, Katharinenhospital, Stuttgart, Germany.
Summary
Unilateral sagittal split osteotomy (USSO) for mandibular correction shows comparable results to bilateral procedures, with minimal adverse effects. This orthognathic surgery technique offers a viable option for correcting jaw alignment.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthognathic Surgery
- Skeletal Reconstruction
Background:
- Mandibular laterognathia requires surgical correction.
- Unilateral sagittal split osteotomy (USSO) is a technique used in orthognathic surgery.
- Limited data exists on the outcomes of USSO.
Purpose of the Study:
- To evaluate the radiological and functional outcomes of unilateral sagittal split osteotomy (USSO) of the mandible.
- To assess condylar resorption and ramus height changes post-USSO.
- To compare functional results with existing literature on bilateral sagittal split osteotomy (BSSO).
Main Methods:
- Retrospective analysis of 26 patients undergoing USSO between 2001-2008.
- Radiographic evaluation for condylar resorption and ramus height in 23 patients.
- Clinical examination and condylar movement measurement in 16 patients.
Main Results:
- Two patients showed signs of condylar resorption or ramus height loss.
- Significant reductions in mouth opening and protrusion were observed post-surgery.
- Surgical site laterality did not impact laterotrusion/retrusion, but right-sided surgery improved left-sided protrusion.
Conclusions:
- USSO is a feasible orthognathic surgery procedure when applied appropriately.
- No significant adverse radiological or functional outcomes were noted compared to BSSO literature.
- This study represents the first investigation into the impact of USSO in orthognathic surgery.