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Repeated distraction osteogenesis for excessive vertical alveolar augmentation: a case report
Seiji Iida1, Tamaki Nakano, Katsuhiko Amano
1First Department of Oral and Maxillofacial Surgery, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan. iida@dent.osaka-u.ac.jp
Summary
Two-stage alveolar distraction osteogenesis effectively lengthens the jawbone after tumor removal. A sufficient healing period ensures bone maturity for dental implant placement, offering a safe augmentation method.
Area of Science:
- Oral and Maxillofacial Surgery
- Regenerative Medicine
- Biomaterials Science
Background:
- Mandibular defects after tumor resection often require significant bone augmentation.
- Iliac bone grafts are common but can resorb, necessitating advanced reconstruction techniques.
- Alveolar distraction osteogenesis offers a method for gradual bone lengthening.
Observation:
- A two-stage alveolar distraction osteogenesis procedure was employed using eccentric devices.
- A 6-month consolidation period separated the two distraction phases.
- Endosseous implants were placed 4 months post-second distraction.
Findings:
- Computerized tomography showed newly generated bone had lower density than native bone 10 months post-distraction.
- Despite lower density, the regenerated bone demonstrated sufficient maturity for endosseous implant integration.
- The two-stage approach facilitated significant alveolar lengthening.
Implications:
- Two-stage alveolar distraction osteogenesis is a viable and safe technique for substantial alveolar ridge augmentation.
- Adequate consolidation periods are crucial for successful bone regeneration and implant success.
- This method enhances reconstructive options for complex mandibular defects.