Mandibular reconstruction using a combination graft of rhBMP-2 with bone marrow cells expanded in vitro

Plastic and Reconstructive Surgery
Ichiro SetoIzumi Asahina

Abstract

The aim of this study was to evaluate the efficacy of a combination graft, using recombinant human bone morphogenetic protein-2 (rhBMP-2) and culture-expanded cells derived from bone marrow, for bone regeneration in a nonhuman primate mandible. Five Japanese monkeys were used. Three milliliters of bone marrow was obtained from the tibia and plated into culture flasks. Adherent cells were cultured until near confluence; then, the proliferated cells were transferred to a three-dimensional culture system using collagen beads as the cell carrier. The medium was supplemented with ascorbic acid, beta-glycerophosphate, and dexamethasone to promote osteoblastic differentiation. After further proliferation on beads, the cells were mixed with a collagen sponge that was impregnated with rhBMP-2 and grafted into surgically created segmental bone defects of the mandibles. Three animals received this treatment, and either culture-expanded cells alone or collagen beads without cells were implanted into the remaining two monkeys as controls. The animals were killed 24 weeks after surgery, and the results were assessed by radiographic and histologic evaluation. The combination graft of culture-expanded bone marrow cells with rhBMP-2 in a collag...Continue Reading

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Jul 17, 2008·Vojnosanitetski pregled. Military-medical and pharmaceutical review·Srboljub Stosić
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