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J. Korean Ceram. Soc. > Volume 40(8); 2003 > Article
Journal of the Korean Ceramic Society 2003;40(8): 730.
doi: https://doi.org/10.4191/kcers.2003.40.8.730
Effects of Particle Size Distribution of CaHPO4·2H2O on Self-hardening Bone Cement
In-Soo Hwang, Sang-Hwan Cho, Jong-Kyu Lee
Ceramics-building Materials Department, Korea Institute of Ceramic Engineering and Technology (KICET)
This research examined the effect, which it follows in particle size distribution change of CaHPO$_4$ㆍ2$H_{2}O$ (DCPD). We used two kinds of compositions; tetracalcium phosphate (TTCP)/dicalcium phosphate dihydrate (DCPD) composition and $alpha$-tricalcium phosphate ($alpha$-TCP)TTCP/DCPD composition. As the result, the mean particle size of the DCPD decreased, the setting tine shortened at all compositions. The reference powder (DR), which did not milling, showed about 2 times strength value compared with other milling sample. Especially, the compressive strength of 60 : 20 : 20 sample (DR(do$_{0.5}$)=12.08 $mutextrm{m}$) after curing 7 days in simulated body fluid solution was 40$pm$0.5 MPa, which was the highest. This resulted from the packing density at $alpha$-TCP/TTCP/DCPD combination.
Key words: Self-hardening, TCP, DCPD, Particle size distribution, Setting time
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