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用化学沉淀法合成了不同钙/磷摩尔比并含碳酸根的部分结晶磷酸钙(partially crystallized calcium phosphates, PCCP),用 PCCP 和无水磷酸氢钙(dicalcium phosphate anhydrous, DCPA)配制了 PCCP+DCPA 体系磷酸钙骨水泥,用去离子水作为骨水泥的固化液。通过相组成的 X 射线衍射分析、扫描电子显微镜观察、孔隙率和抗压强度测定,研究了钙磷摩尔比[n(Ca)/n(P)]对 PCCP+DCPA 磷酸钙骨水泥性能的影响。结果表明:随着部分结晶磷酸钙中 n(Ca)/n(P)的提高,磷酸钙骨水泥试件的抗压强度明显下降,但磷酸钙骨水泥水化产物羟基磷灰石的结晶度提高,固化体中大于 100 nm 的孔隙增多、固化体的孔隙率增大,可见,n(Ca)/n(P)对磷酸钙骨水泥的性能有重要影响,在制备磷酸钙骨水泥时应选择适当的 n(Ca)/n(P)。
Partially crystallized calcium phosphates (PCCP) with different Ca / P molar ratio and carbonate were synthesized by chemical precipitation. PCCP + DCPA was prepared by using PCCP and dicalcium phosphate anhydrous (DCPA) System calcium phosphate cement, with deionized water as a bone cement curing solution. The effect of Ca / P molar ratio [n (Ca) / n (P)] on the properties of PCCP + DCPA calcium phosphate cements was studied by X-ray diffraction analysis, scanning electron microscopy, porosity and compressive strength measurements. . The results showed that with the increase of n (Ca) / n (P) in partially crystalline calcium phosphate, the compressive strength of calcium phosphate cement decreased significantly, but the crystallinity of hydroxyapatite Increase, the pores in the solidified body more than 100 nm increase, and the porosity of the solidified body increases. It can be seen that n (Ca) / n (P) has an important influence on the properties of calcium phosphate cements. Choose the appropriate n (Ca) / n (P).