Effect of Mg 2+ Content on Lattice Parameter and Phase Transformation Temperature of β-α TCP

INTRODUCTION: Tricalcium phosphate Ca3(PO4)2 (TCP), an osteoconductive as well as bioresorbable phase, has found application as bone cement and bone implant material. TCP can crystallize in three polymorphic modifications: βTCP below 1180 °C, α-TCP between 1180 °C and 1430 °C, and α`-TCP above 1430 °C [1]. Mainly β-TCP and α-TCP have reached acceptance in biomedical applications. At the moment β-TCP ceramics are use for non load-bearing applications in oral surgery. In this investigation the determination of the influence of partial Mg substitution of Ca in the solid solution series of β-TCP (Ca1-XMgX)3(PO4)2 was determined at 1025 °C ± 10 °C in air. The temperatures for β-α-phase transformation were determined in dependence of the Mg content.