在α-TCP/TTCP系磷酸钙骨水泥中分别添加化学沉淀反应合成的低结晶度羟基磷灰石(HAP)及采用高温固相反应法制备的高结晶度HAP,探讨这两种晶体对磷酸钙骨水泥胶凝性能的影响.结果表明:低结晶度的HAP粉末可以起到晶核作用,降低核化势垒使水化反应速度加快,凝结时间缩短,但由于水化产物从饱和溶液中析出太快、太细,晶体发育不完整,易通过溶解再结晶使抗压强度有所下降.高结晶度的HAP会使水化反应速度减慢,凝固时间延长,相当于"骨料"存在于水泥基体中而使抗压强度有所提高.
参考文献
| [1] | Keating JF;Hajducka CL;Harper J .Minimal internal fixation and calcium-phosphate cement in the treatment of fractures of the tibial plateau. A pilot study.[J].The Journal of Bone and Joint Surgery. British VolumecBritish Orthopaedic Association , Australian Orthopaedic Association , Canadian Orthopaedic Association . . . [et al],2003(1):68-73. |
| [2] | Xu H H;Takagi S;Sun L et al.Development of a nonrigid,durable calcium phosphate cement for use in periodontal bone repair[J].Journal of the American Dental Association,2006,137(08):1131-1138. |
| [3] | MANOJ KOMATH;H K VARMA .Development of a fully injectable calcium phosphate cement for orthopedic and dental applications[J].Bulletin of Materials Science,2003(4):415-422. |
| [4] | Bai B;Jazrawi LM;Kummer FJ;Spivak JM .The use of an injectable, biodegradable calcium phosphate bone substitute for the prophylactic augmentation of osteoporotic vertebrae and the management of vertebral compression fractures.[J].Spine,1999(15):1521-1526. |
| [5] | Fukase Y;Eanes E D;Takagi S et al.Setting reactions and compressive strength of calcium phosphate cement[J].Journal of Dental Research,1990,69(12):1852-1856. |
| [6] | Chow L C .Calcium phosphate cement[J].MONOGRAPHS IN ORAL SCIENCE,2001,18:148-163. |
| [7] | Lacout J L;Mejdoubi E;Hamad M .Crystallization mechanism of calcium phosphate cement for biological uses[J].Journal of Materials Science:Materials in Medicine,1996,7:371-374. |
| [8] | 戴红莲,闫玉华,李世普,贺建华.α-磷酸三钙-磷酸四钙生物骨水泥的研究[J].材料科学与工程,2002(03):331-335. |
| [9] | 关英.岩石矿物分析[M].北京:地质出版社,1991:159. |
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