The physicochemical properties of the solidification of calcium phosphate cement.
In this article, the physicochemical properties of the solidification of calcium phosphate cement (CPC) were investigated, and the components of the solidified body and the characteristics involved in the application were measured. The setting process of CPC was moderate and slightly exothermic, the heat liberation rate was slow, and the temperature increased little. At the initial stage of the hydration, the compressive strength rose linearly with time, and reached the maximum value after 4 hours. The volume was slightly shrunken by 1% during the setting process, and the total heavy metal content was below 2 ppm. The porosity of the solidified body was about 30%, which was mainly the gel pore with size below 0.1 microm. The final product of hydration was low crystalline hydroxyapatite (HAP). Its real density was 2.859 g/cm(3), which was lower than the theoretical value. This may be due to the existence of lattice defects, which will lead to a slight rise in solubility when leached in physiological saline.
Liu
Changsheng
C
Engineering Research Center for Biomedical Materials of the Ministry of Education, East China University of Science and Technology, 130 Meilong Road, P. O. Box 112, Shanghai 200237, People's Republic of China. csliu@sh163.net
Huang
Yue
Y
Chen
Jianguo
J
D000269:Adhesives / Q000737:chemistry*; D002130:Calcium Phosphates / Q000737:chemistry*; D003460:Crystallization; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D016062:Porosity; D012965:Sodium Chloride; D014961:X-Ray Diffraction
D000269:Adhesives; D002130:Calcium Phosphates; D012965:Sodium Chloride; C020243:calcium phosphate