[Physical properties of apatite bone cement].
Some properties of the apatite bone cement which is composed of alpha-tricalcium phosphate and hydroxyapatite for use as a biomaterial were investigated. The powder of cement was synthesized from calcium phosphate, calcium carbonate and dicalcium phosphate by solid reaction. Several kinds of citric acid solutions were used for hardening. When the liquid for hardening was 30% (w/w) citric acid solution, the setting time was about six minutes, the compressive strength of hardened bodies was 24.96 MPa, and the solubility was about 1.4 wt%. The compressive strength was increased by the addition of Na or K salt. Especially, when copolymer of acrylic acid/itaconic acid was added to the liquied, the strength was increased about three times, but the setting time was significantly shortened. The results of this study indicate that the apatite bone cement is a potentially highly useful biomaterial for dental and medical applications.
Chen
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Shanghai Biomaterial Research & Test Center, Shanghai.
D001031:Apatites / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D001843:Bone Cements / Q000737:chemistry*; D012995:Solubility
D001031:Apatites; D001672:Biocompatible Materials; D001843:Bone Cements