选择α-磷酸三钙(α-TCP)为基本原料,添加羟基磷灰石(HAP)、磷酸氢钙(DCPD)、碳酸钙(CaCO<,3>)、氧化钙(CaO)等其它辅料,添加不同量的超细无定形硅酸钙(CaSiO<,3>),研究超细无定形CaSiO<,3>的加入量对磷酸钙骨水泥性能的影响.对其基本性能进行了研究,并对固化骨水泥样品进行了Ringer's模拟液浸泡实验,对浸泡液pH值、样品抗压强度随浸泡时间变化进行了研究.实验结果表明:在磷酸钙骨水泥中添加超细无定形CaSiO<,3>,可以促进骨水泥的固化,提高其硬化物的抗压强度.当在所设计的骨水泥配方中添加5%的超细无定形CaSiO,时,骨水泥的性能达到最佳.其对应的初凝时间、终凝时间分别只有5.5 min和16.5min,当骨水泥在Ringer's溶液中浸泡两周后,抗压强度可达50.44 MPa,同时浸泡液的pH值变化幅度小,和起始pH值(pH=7.40)接近.
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