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The skeletal stability after maxillo-mandibular osteotomy with a "physiological positioning strategy"
Seigo Ohba1, Noriko Nakao2, Yuya Nakatani3
1Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Biomedical Sciences; Division of Dentistry and Oral Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui.
The British Journal of Oral & Maxillofacial Surgery
|September 7, 2014
Summary
Maxillomandibular osteotomy with physiological positioning provides reliable skeletal and dental stability in patients with mandibular prognathism. This surgical approach ensures long-term stability for both the maxilla and mandible.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthodontics
- Craniofacial Surgery
Background:
- Mandibular prognathism presents significant skeletal and dental challenges.
- Surgical correction often involves maxillomandibular osteotomy.
- Maintaining skeletal and dental stability post-surgery is crucial for treatment success.
Purpose of the Study:
- To evaluate skeletal and dental stability following maxillomandibular osteotomy with physiological positioning.
- To assess the long-term stability of surgical correction for mandibular prognathism.
Main Methods:
- Cephalometric analysis was employed to measure skeletal and dental changes.
- Ten patients with mandibular prognathism underwent Le Fort I maxillary osteotomy and unfixed short lingual mandibular osteotomy.
- Measurements were taken preoperatively, immediately postoperatively, and over 1 year after surgery.
Main Results:
- Minimal immediate postoperative changes were observed in SNA (0.15°) and SN-palatal planes (1.0°).
- Anterior nasal spine, posterior nasal spine, and A point showed negligible alterations at the 1-year follow-up.
- A statistically significant but minimal postoperative difference was noted for SNB (0.76°, p=0.04), with apparent dental stability.
Conclusions:
- Maxillomandibular osteotomy combined with physiological positioning achieves reliable skeletal and dental stability.
- This surgical technique is effective for treating patients with mandibular prognathism.
- The study demonstrates the long-term stability of the maxilla and mandible after this procedure.
