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Healing process after alveolar ridge distraction in sheep
A Gaggl1, G Schultes, S Regauer
1University Hospital Graz, Department of Oral and Maxillofacial Surgery, Austria. alexander.gaggl@kfunigraz.ac.at
Summary
This study demonstrates that distraction implants in sheep mandibles heal through desmal ossification, similar to long bones. Osseous integration of these implants, used for mandibular augmentation, was achieved within six months.
Area of Science:
- Oral and Maxillofacial Surgery
- Regenerative Medicine
- Biomaterials Science
Background:
- Mandibular alveolar ridge augmentation is crucial for dental implant placement.
- Distraction osteogenesis offers a method for bone lengthening.
- A novel distraction device transforms into a dental implant post-distraction.
Purpose of the Study:
- To evaluate the application of a novel distraction device in an animal model.
- To investigate the osseous healing process following mandibular distraction osteogenesis.
- To assess the potential of the distraction device as a future dental implant.
Main Methods:
- Distraction implants were surgically placed in the mandibles of 8 sheep.
- A daily distraction rate of 0.5 mm was applied for 8 days.
- Mandibles were analyzed clinically, radiologically, and histologically at 1, 2, 3, and 6 months post-distraction.
Main Results:
- Radiopacity of the distraction gap increased progressively, with mature bone formation by 6 months.
- Histology revealed desmal ossification and increasing osteoid, with complete bone remodeling in most areas by 6 months.
- Osseointegration of the distraction implants was evident at the screw thread and cylinder regions after 6 months.
Conclusions:
- The distraction implant healing process mimics long bone healing via desmal ossification.
- Osseous integration of the distraction implants was confirmed at 6 months.
- Implants demonstrated stability by 3 months, with full osseous integration achieved by 6 months.