Formation of oriented hydroxyapatite crystals in a hydrogel

Taishi Yokoi, Ill Yong Kim, Masakazu Kawashita, Chikara Ohtsuki

研究成果: Conference contribution

抄録

Calcium phosphate-polymer composites have been produced for bone-repairing. We have focused development of composites by a crystal growth technique in a hydrogel matrix, that is regarded as gel-mediated processing. Under the gel-mediated condition, reaction temperature is one of the major parameter to determine microstructure of the precipitated crystals. In the present study, we investigated effects of the reaction temperature on formation of calcium phosphates through gel-mediated processing where double diffusion technique was applied. Crystalline phases of calcium phosphate formed in the hydrogel were varied from octacalcium phosphate (OCP) to hydroxyapatite (HAp) with increasing the reaction temperature. OCP crystals formed at 4 and 40 °C had granular or spherical shape, while HAp crystals formed at 80 °C had rod shape. The HAp crystals were composed of a large number of fibrous crystals. The rod-shaped HAp crystals were oriented in the direction of ion diffusion. Formation of oriented HAp crystals was generated by increase in diffusion rate of ions in the hydrogel matrix after increasing reaction temperature in gel-mediated processing.

本文言語English
ホスト出版物のタイトルBioceramics 24
出版社Trans Tech Publications Ltd
ページ24-28
ページ数5
1
ISBN(印刷版)9783037855171
DOI
出版ステータスPublished - 2013
イベント24th Symposium and Annual Meeting of International Society for Ceramics in Medicine, ISCM 2012 - Fukuoka, Japan
継続期間: 2012 10 212012 10 24

出版物シリーズ

名前Key Engineering Materials
番号1
529-530
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

Other

Other24th Symposium and Annual Meeting of International Society for Ceramics in Medicine, ISCM 2012
国/地域Japan
CityFukuoka
Period12/10/2112/10/24

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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