Paper Title:
In Vivo Evaluation of Porous Hydroxyapatite/Poly D/L-lactide Composite for Bone Substitutes and Scaffolds
  Abstract

We had investigated the biocompatibility, osteoconductivity, and biodegradability of a porous composite of hydroxyapatite (HA) and poly-DL-lactide (PDLLA) implanted into rabbit femoral condyles. It showed excellent osteoconductivity and biodegradability as a bone substitute. Newly formed bones were remodeled, and materials were resorbed almost completely at 78weeks after implantation. In consideration of its biocompatibility and degradability, we investigated its potential for use as a cellular scaffold and evaluated its osteoinductive property. On implantation to the rat dorsal subcutaneous tissue loaded with syngeneic bone marrow cells, osteogenesis with enchondral ossification was seen both on and in the material at 3 weeks after implantation. This osteogenesis in the HA/PDLLA tended to get mature and newly formed bone tissues were found in the material by 6weeks. To investigate the osteoinductive property material itself has, we attempted to implant this porous composite material to extra-osseous canine dorsal muscle. At 2months, osteogenesis was seen in the pores of the material. It indicated the material induced osteogenesis with intramembranous ossification process. Therefore, HA/PDLLA might be a desirable material for bone substitutes and cellar scaffolds with osteoconductive and osteoinductive property.

  Info
Periodical
Key Engineering Materials (Volumes 309-311)
Main Theme
Edited by
Takashi Nakamura, Kimihiro Yamashita and Masashi Neo
Pages
1311-1314
DOI
10.4028/www.scientific.net/KEM.309-311.1311
Citation
S. Hasegawa, J. Tamura, M. Neo, S. Fujibayashi, K. Goto, Y. Shikinami, K. Okazaki, T. Nakamura, "In Vivo Evaluation of Porous Hydroxyapatite/Poly D/L-lactide Composite for Bone Substitutes and Scaffolds ", Key Engineering Materials, Vols. 309-311, pp. 1311-1314, 2006
Online since
May 2006
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$32.00
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