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Schenk, U., Prenzel, H., Magnucki, G., Hoang-Vu, C., Schaller, H.G., Diederich, A., Gernhardt, C., Dietze, K., Navarrete Santos, A., Niehues, S.M., Jung, F. and Hiebl, B. (2015) Non-Autologous Endodontic Pulp Regeneration Approach in Molar Teeth of the Rat. Journal of Cellular Biotechnology, 1, 27-35. http://dx.doi.org/10.3233/JCB-15003

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• TITLE: In Vivo Estimation of Osteogenesis by Bone Marrow Cells in a Bi-Phasic Scaffold and in Each of Its Components

  AUTHORS: Masataka Yoshikawa, Hideyuki Kakigi, Ayano Miyamoto, Sadaomi Sugimoto, Keisuke Nakai, Hideaki Ikenaga, Takeshi Inamoto, Hiroshi Maeda

  KEYWORDS: Bi-Phasic Scaffold, Hydroxyapatite, Polyvinyl Alcohol Sponge, Bone Formation, In Vivo

  JOURNAL NAME: Journal of Biomedical Science and Engineering, Vol.9 No.11, October 26, 2016

  ABSTRACT: A bi-phasic scaffold consisting of a columnar formaldehyde-acetalized polyvinyl alcohol (PVF) sponge and a cylindrical porous hydroxyapatite (HA) with a hollow center was devised. Rat bone marrow cells (rBMCs) were seeded into the sponge placed in the hollow center of the cylindrical porous HA. The bi-phasic scaffold, a cylindrical porous HA and a PVF sponge separated from a bi-phasic scaffold after rBMC seeding, and a PVF sponge without rBMCs as a negative control, were implanted for 6 weeks into rat dorsal subcutaneous tissue. In each construct, bone formation was examined histologically and osteocalcin was measured immunochemically. Bone formation was observed in the bi-phasic scaffold and also in the cylindrical porous HA isolated from the bi-phasic scaffold. A significant difference in the quantity of osteocalcin was observed between the bi-phasic scaffold and the isolated cylindrical porous HA. No bone formation was found in the isolated PVF sponge. The bi-phasic scaffold as an outer layer of the scaffold seemed to inhibit the outflow of rBMCs from the PVF sponge. This type of bi-phasic scaffold may have two specific characteristics: Attachment of cells both in PVF sponge and cylindrical porous HA.