| TTCP-DCPA-β-TCP-PHA계 골 시멘트 |
| 김형준, 최성철, 석준원1, Rainer Telle1 |
한양대학교 세라믹공학과
1아헨대학 세라믹공학과 |
| Bone Cements in TTCP, DCPA, β-TCP and PHA System |
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| ABSTRACT |
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The effect of $beta$-TCP and PHA as additives on initial setting time, compressive strength and surface micro-structure after in vitro test of bone cement in TTCP and DCPA system was investigated. The median particle sizes of TTCP, $beta$-TCP, DCPA and PHA for bone cement were about 3, 5, 0.9 and 4${mu}{textrm}{m}$, respectively. Initial setting time and compressive strength of bone cement with various composition was measured by Vicat test and Universal Testing Machine, and surface morphology and crystalline phases of bone cements were observed and analyzed by SEM and x-ray diffractometer. Initial setting time was not affected by composition but by powder/liquid ratio, and cement with PHA required double amount of solution for paste as much as one without PHA, especially. It was thought that $beta$-TCP and PHA in bone cements was not related to setting reaction. Thus, the addition of $beta$-TCP and PHA in bone cements decreased compressive strength and inhabited HAP from being produced on surface in vitro test. In conclusion, it was not expected that $beta$-TCP and PHA in TTCP-DCPD bone cements enhanced the strength and bioacitivity. |
| Key words:
Bone cement, Tetracalcium phosphate, Dicalcium phosphate anhydrate, Precipitated hydroxyapatite, $\beta$-Tricalcium phosphate |
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