A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bioactive bone cements of calcium phosphate - mono(methacryloyloxyethyl) acid phosphate composite
Bone cements of calcium phosphate/mono(methacryloyloxyethyl) acid phosphate (P-1M) composite were prepared and their physicochemical and mechanical properties were investigated. Calcium phosphate used in this study is as follows; alpha-TCP (tricalcium phosphate) and beta-TCP and Hap (hydroxyapatite). When the ratio (weight-%) of P-1M to each calcium phosphate was 0.5, mixture was paste-like due to the high viscosity of P-1M, and then it hardened after 30 min. The compressive strength was 26 MPa to 31 MPa for alpha-TCP/P-1M composite, 20 MPa to 22 MPa for beta-TCP/P-1M composite, and 19 MPa to 21 MPa for HAp-200/P-1M composite. It decreased to 3 MPa to 8 MPa by heating alpha-TCP/P-1M and HAp-200P-1M composite at 300 deg C to 600 deg C because they became to be porous. But, it was almost constant for beta-TCP/P-1M composite. After alpha-TCP/P-1M composite was soaked in 0.9 % NaCl aqueous solution for 24 hours, the surface (thickness: approx. 0.3 mm) of the block specimen changed to calcium hydrogen phosphate dihydrate (DCPD) from alpha-TCP, and the inside had different structure from the surface. The shape of the surface material was rectangular plate and the inside material formed network.
Bioactive bone cements of calcium phosphate - mono(methacryloyloxyethyl) acid phosphate composite
Bone cements of calcium phosphate/mono(methacryloyloxyethyl) acid phosphate (P-1M) composite were prepared and their physicochemical and mechanical properties were investigated. Calcium phosphate used in this study is as follows; alpha-TCP (tricalcium phosphate) and beta-TCP and Hap (hydroxyapatite). When the ratio (weight-%) of P-1M to each calcium phosphate was 0.5, mixture was paste-like due to the high viscosity of P-1M, and then it hardened after 30 min. The compressive strength was 26 MPa to 31 MPa for alpha-TCP/P-1M composite, 20 MPa to 22 MPa for beta-TCP/P-1M composite, and 19 MPa to 21 MPa for HAp-200/P-1M composite. It decreased to 3 MPa to 8 MPa by heating alpha-TCP/P-1M and HAp-200P-1M composite at 300 deg C to 600 deg C because they became to be porous. But, it was almost constant for beta-TCP/P-1M composite. After alpha-TCP/P-1M composite was soaked in 0.9 % NaCl aqueous solution for 24 hours, the surface (thickness: approx. 0.3 mm) of the block specimen changed to calcium hydrogen phosphate dihydrate (DCPD) from alpha-TCP, and the inside had different structure from the surface. The shape of the surface material was rectangular plate and the inside material formed network.
Bioactive bone cements of calcium phosphate - mono(methacryloyloxyethyl) acid phosphate composite
Bioaktiver Knochenzement auf Basis einer Verbindung aus Calciumphosphat und Mono(methacryloyloxyethyl)-Säure-Phosphat
Sakamoto, K. (author) / Tsunawaki, Y. (author) / Takahashi, J. (author) / Matsumoto, T. (author) / Nakahira, A. (author) / Yamaguchi, S. (author) / Inoue, M. (author) / Okazaki, M. (author)
1999
4 Seiten, 5 Bilder, 2 Quellen
Conference paper
English
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