Fabrication of B-type carbonate apatite blocks by the phosphorization of free-molding gypsum-calcite composite

Chowdury Tanira Zaman, Akari Takeuchi, Shigeki Matsuya, Q. H.M.Shawket Zaman, Kunio Ishikawa

研究成果: Contribution to journalArticle査読

27 被引用数 (Scopus)

抄録

B-type carbonate apatite (CO3Ap) block may be an ideal artificial bone substitute because it is closer in chemical composition to bone mineral. In the present study, the feasibility to fabricate CO3Ap blocks was investigated using compositional transformation, which was based on the dissolution-precipitation reaction of a gypsum-calcite composite with free-molding behavior. For the compositional change, or phosphorization, gypsum-calcite composites of varying CaCO3 contents were immersed in 1 mol/L (NH4)3PO4 aqueous solution at 100°C for 24 hours. No macroscopic changes were found after the treatment, whereas microscopic change was observed at SEM level. X-ray diffraction, Fourier transform infrared spectroscopy and CHN analysis indicated that the composites were B-type CO3Ap containing approximately 6-7 wt% of CO3, a value similar to that of biological bone apatite. Diametral tensile strength of the CO3Ap block was approximately 1-3 MPa. Based on the results obtained, it was therefore concluded that gypsum-calcite was a good candidate for the fabrication of CO3Ap blocks, coupled with the advantage that the composite can be molded to any shape by virtue of the setting property of gypsum.

本文言語英語
ページ(範囲)710-715
ページ数6
ジャーナルdental materials journal
27
5
DOI
出版ステータス出版済み - 10 28 2008

All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 歯科学(全般)

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