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Volume 29 , Issue 1
January/February 2014

Pages e66e72

Island Osteoperiosteal Flap Vitality when Isolated from Basal Bone by Silicone Interposition: An Experimental Study in Rabbit Tibia

Amir Laviv, DMD/Jason Ringeman, DDS, MD/Meir Debecco, DMD/Ole T. Jensen, DDS, MS/Nardy Casap, DDS, MD

PMID: 24451890
DOI: 10.11607/jomi.te44

Purpose: This study sought to confirm, through histologic evaluation, the vitality and viability of the island osteoperiosteal flap (i-flap) in a rabbit tibia model. Materials and Methods: In four rabbits, an osteotomy was performed on the tibial aspect of the right leg. A bone flap was raised, but the periosteal attachment was kept intact. The free-floating i-flap was separated from the rest of the bone by a silicone sheet. The rabbits were to be sacrificed after 1, 2, 4, and 8 weeks and histologic samples examined. Results: All surgeries were accomplished successfully; however, three animals showed fractured tibiae within a few days after surgery and were sacrificed immediately after the fractures were discovered. The fourth rabbit was sacrificed at 4 weeks. Histologic specimens showed vital new bone in the i-flap area and signs of remodeling in the transition zone and the original basal bone. Conclusion: The i-flap remained vital. This suggests potential for use in bone augmentation strategies, particularly for the alveolar split procedure.

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