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Ann Otol Rhinol Laryngol [Suppl]
The Annals of Otology, Rhinology & Laryngology. Supplement
|November 1, 1978
Summary
This study shows that replacing a resected canine mandible with the original frozen bone graft can successfully rebuild bone tissue. Immobilization is key for this mandibular reconstruction, suggesting potential for human application.
Area of Science:
- Oral and Maxillofacial Surgery
- Regenerative Medicine
- Biomaterials Science
Background:
- Major head and neck surgery often requires mandibular resection, leading to functional deficits.
- Replacing the resected mandible is challenging, with complications common even with expert care.
- Autologous grafts, specifically the patient's own resected mandible, offer advantages in antigenicity and fit.
Purpose of the Study:
- To investigate the potential for osseous regeneration in a canine mandibular body after resection, cryopreservation, and replacement.
- To determine the necessity of graft immobilization for successful bone healing and vascularization.
- To evaluate the viability of using a cryopreserved autograft for mandibular reconstruction.
Main Methods:
- Canine mandibles underwent resection, freezing, and replacement of the resected segment.
- Graft immobilization was a critical factor in the surgical procedure.
- In vivo imaging (Technetium-99m methylene diphosphonate scans) and histopathological analysis (tetracycline fluorescence, polarizing microscopy) were employed.
Main Results:
- A healthy and revitalized osseous network was reestablished in the grafted mandibular segments.
- Neoosteogenesis (new bone formation) was confirmed through both imaging and microscopic examination.
- Successful bone regeneration was observed when the cryopreserved mandibular graft was immobilized.
Conclusions:
- Cryopreserved, immobilized autologous mandibular grafts can support significant bone regeneration in canines.
- This technique demonstrates potential for future mandibular reconstruction in humans following extensive oncologic resection.
- Further refinement is needed to optimize the procedure for clinical application in human patients.