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Stability associated with mandibular advancement treated by rigid osseous fixation
Summary
Rigid screw fixation for sagittal ramus split osteotomy (SSO) in mandibular deficiency showed initial stability. However, subsequent relapse and decreased facial height suggest further investigation is needed for this surgical procedure.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthognathic Surgery
- Craniofacial Reconstruction
Background:
- Transosseous wire fixation for mandibular sagittal ramus osteotomy (SSO) is associated with relapse.
- Rigid screw fixation is proposed to reduce relapse incidence in SSO procedures.
Purpose of the Study:
- To prospectively evaluate the stability of sagittal ramus osteotomy (SSO) fixed with bone screws in patients with horizontal mandibular deficiency.
Main Methods:
- Nine subjects with horizontal mandibular deficiency underwent SSO with rigid bone screw fixation.
- Serial cephalometric radiographs were analyzed using standardized superimposition techniques.
Main Results:
- Minimal horizontal movement at Points B and Pg was observed in the first six weeks post-surgery.
- A slight advancement was noted at six months, alongside a decrease in surgically increased facial height.
- The stability of bone screw fixation in SSO requires further investigation.
Conclusions:
- Sagittal ramus osteotomy (SSO) with rigid bone screw fixation demonstrates initial stability but shows subsequent changes in mandibular position and facial height.
- Further research is warranted to fully understand the long-term stability and outcomes of this fixation method.