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Stability of mandibular advancement osteotomy using rigid internal fixation
P G Barer1, T R Wallen, R W McNeill
1Department of Orthodontics, University of Washington School of Dentistry, Seattle.
Summary
This study on mandibular lengthening surgery found the inverted L osteotomy technique highly stable long-term. Postoperative stability was improved, with condylar position influencing any minor relapse tendencies.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthognathic Surgery
- Skeletal Reconstruction
Background:
- Mandibular lengthening is crucial for treating skeletal discrepancies.
- Traditional techniques often face challenges with stability and relapse.
- The inverted L osteotomy offers a potential solution for enhanced mandibular reconstruction.
Purpose of the Study:
- To evaluate the long-term skeletal and dental stability after mandibular lengthening using an inverted L osteotomy.
- To assess the influence of rigid internal fixation and bone grafting on surgical outcomes.
- To compare the stability of this technique with previously documented methods.
Main Methods:
- Retrospective cephalometric analysis of 43 patients.
- Surgical procedure involved inverted L osteotomy, bone grafting, and rigid internal fixation.
- Longitudinal evaluation of skeletal and dental changes over a mean follow-up of 1 year 9 months.
Main Results:
- The surgical technique demonstrated a high level of postoperative stability.
- Minimal individual variability was observed, with no consistent relapse tendency.
- Condylar repositioning was identified as a factor in patients with slight relapse.
Conclusions:
- The inverted L osteotomy with bone grafting and rigid internal fixation provides significant long-term stability for mandibular lengthening.
- This technique appears superior to previously reported methods in terms of postoperative stability.
- Careful condylar repositioning may further optimize outcomes and minimize relapse.