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Boo, Jae Seong; Yamada, Yoichi; Okazaki, Yasuhiro; Hibino, Yoshitaka; Okada, Kunihiko; Hata, Ken-Ichiro; Yoshikawa, Takafumi; Sugiura, Yasuo; Ueda, Minoru
The Journal of craniofacial surgery 13, Issue: 2Journal Article
Bone marrow has been shown to contain a population of rare cells capable of differentiating to the cells that form various tissues. These cells, referred to as mesenchymal stem cells (MSCs), are capable of forming bone when implanted ectopically in an appropriate scaffold. The aim of this study was to investigate the potential of a new beta-tricalcium phosphate (beta-TCP) as a scaffold and to compare the osteogenic potential between beta-TCP and hydroxyapatite (HA). The beta-TCP and HA loaded with MSCs were implanted in subcutaneous sites and harvested at 1, 2, 4, and 8 weeks after implantation for biochemical and histological analysis. Biochemically, in both beta-TCP and HA composites, the alkaline phosphatase activity in the composites could be detected and was maintained at a high level for 8 weeks. In the histological analysis, active bone formation could be found in both the beta-TCP and HA composites. These findings suggest that beta-TCP could play a role as a scaffold as well as HA. The fabricated synthetic bone using biodegradable beta-TCP as a scaffold in vivo is useful for reconstructing bone, because the scaffold material is absorbed several months after implantation.
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