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Effect of molding pressure on fabrication of low-crystalline calcite block

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Abstract

We have reported that low-crystalline porous calcite block, which is useful as a bone substitute or a source material to prepare apatite-type bone fillers could be fabricated by exposing calcium hydroxide compact to carbon dioxide gas saturated with water vapor. In the present study, we investigated the effect of molding pressure on the transformation of calcium hydroxide into calcite and the mechanical strength of the carbonated compact. Transformation into calcite was almost completed within 72 h, however, a small amount of Ca(OH)2 still remained unreacted at higher molding pressure because of incomplete penetration of CO2 gas into the interparticle space due to dense packing of Ca(OH)2 particles. On the other hand, high molding pressure resulted in an increase in diametral tensile strength (DTS) of the calcite compact formed. Critical porosity of the calcite block was calculated as approximately 68%.

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Acknowledgments

This study was supported in part by a Grant-in-aid for Scientific Research from the Ministry of Education, Sports, Culture, Science, and Technology, Japan.

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Authors and Affiliations

  1. Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan

    Xin Lin, Masaharu Nakagawa & Kunio Ishikawa

  2. Department of Fixed Prosthodontics, Faculty of Dental Science, Kyushu University, Fukuoka, Japan

    Xin Lin & Yoshihiro Terada

  3. Section of Bioengineering, Department of Dental Engineering, Fukuoka Dental College, Sawara-ku, Fukuoka, 814-0193, Japan

    Shigeki Matsuya

Authors
  1. Xin Lin
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  2. Shigeki Matsuya
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  3. Masaharu Nakagawa
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  4. Yoshihiro Terada
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  5. Kunio Ishikawa
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Correspondence to Shigeki Matsuya.

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Lin, X., Matsuya, S., Nakagawa, M. et al. Effect of molding pressure on fabrication of low-crystalline calcite block. J Mater Sci: Mater Med 19, 479–484 (2008). https://doi.org/10.1007/s10856-006-0028-7

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  • DOI: https://doi.org/10.1007/s10856-006-0028-7

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