Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
ISSN-L : 0287-4547
Original Papers
Fabrication of low-crystalline carbonate apatite foam bone replacement based on phase transformation of calcite foam
Michito MARUTAShigeki MATSUYASeiji NAKAMURAKunio ISHIKAWA
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ジャーナル フリー

2011 年 30 巻 1 号 p. 14-20

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抄録
Carbonate apatite (CO3Ap) foam may be an ideal bone substitute as it is sidelined to cancellous bone with respect to its chemical composition and structure. However, CO3Ap foam fabricated using α-tricalcium phosphate foam showed limited mechanical strength. In the present study, feasibility of the fabrication of calcite which could be a precursor of CO3Ap was studied. Calcite foam was successfully fabricated by the so-called “ceramic foam” method using calcium hydroxide coated polyurethane foam under CO2+O2 atmosphere. Then the calcite foam was immersed in Na2HPO4 aqueous solution for phase transformation based on dissolution-precipitation reaction. When CaO-free calcite foam was immersed in Na2HPO4 solution, low-crystalline CO3Ap foam with 93–96% porosity and fully interconnected porous structure was fabricated. The compressive strength of the foam was 25.6±6 kPa. In light of these results, we concluded that the properties of the precursor foam were key factors for the fabrication of CO3Ap foams.
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© 2011 The Japanese Society for Dental Materials and Devices
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