Physical properties of a novel glass-ceramic-reinforced hyrdroxyapatite composite

摘要

An investigation was performed with the objective of determining the effects of adding calcium-phosphate based materials of varying Ca:P ratios on the sintering characteristics and phase composition of hydroxyapatite. Samples were prepared from a commercially available hydroxyapatite (Plasma Biotal, U.K.) and two Ca-P additives, CAP1 and CAP2. Compacts were then pressed and sintered at 1300 deg C for 2 hours and characterised by measurements of linear shrinkage, density, and X-ray diffraction. The results were compared with those for pressed and sintered hydroxyapatite, which served as a control. The CAP2-HA underwent a greater degree of shrinkage and densification than both CAP1-HA and as-received HA, demonstrating its potential as a sintering aid. Furthermore, X-ray diffraction patterns demonstrated that there was minimal decomposition of the HA to TCP in the CAP2-HA than in the CAP1-HA, and preliminary strength tests indicated that the CAP2 additions reinforced the HA.