International Journal of Medical Sciences

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21 October 2017

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Int J Med Sci 2016; 13(6):466-476. doi:10.7150/ijms.15560

Research Paper

Efficacy of Honeycomb TCP-induced Microenvironment on Bone Tissue Regeneration in Craniofacial Area

Satoko Watanabe1, Kiyofumi Takabatake2, Hidetsugu Tsujigiwa3, Toshiyuki Watanabe1, Eijiro Tokuyama1, Satoshi Ito2, Hitoshi Nagatsuka2, Yoshihiro Kimata1✉

1. Department of Plastic and Reconstructive Surgery, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
2. Department of Oral Pathology and Medicine, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
3. Department of Life Science, Faculty of Science, Okayama University Science, Japan.

Abstract

Artificial bone materials that exhibit high biocompatibility have been developed and are being widely used for bone tissue regeneration. However, there are no biomaterials that are minimally invasive and safe. In a previous study, we succeeded in developing honeycomb β-tricalcium phosphate (β-TCP) which has through-and-through holes and is able to mimic the bone microenvironment for bone tissue regeneration. In the present study, we investigated how the difference in hole-diameter of honeycomb β-TCP (hole-diameter: 75, 300, 500, and 1600 μm) influences bone tissue regeneration histologically. Its osteoconductivity was also evaluated by implantation into zygomatic bone defects in rats. The results showed that the maximum bone formation was observed on the β-TCP with hole-diameter 300μm, included bone marrow-like tissue and the pattern of bone tissue formation similar to host bone. Therefore, the results indicated that we could control bone tissue formation by creating a bone microenvironment provided by β-TCP. Also, in zygomatic bone defect model with honeycomb β-TCP, the result showed there was osseous union and the continuity was reproduced between the both edges of resected bone and β-TCP, which indicated the zygomatic bone reproduction fully succeeded. It is thus thought that honeycomb β-TCP may serve as an excellent biomaterial for bone tissue regeneration in the head, neck and face regions, expected in clinical applications.

Keywords: honeycomb β-TCP, bone tissue regeneration, bone microenvironment, pore size, Bone morphogenetic protein-2

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How to cite this article:
Watanabe S, Takabatake K, Tsujigiwa H, Watanabe T, Tokuyama E, Ito S, Nagatsuka H, Kimata Y. Efficacy of Honeycomb TCP-induced Microenvironment on Bone Tissue Regeneration in Craniofacial Area. Int J Med Sci 2016; 13(6):466-476. doi:10.7150/ijms.15560. Available from http://www.medsci.org/v13p0466.htm