EVALUATION OF TRICALCIUMPHOSPHATE HYDROXYAPATITE CEMENT FOR TOOTH REPLACEMENT - AN EXPERIMENTAL ANIMAL STUDY

calciumphosphate cement, consisting mainly of tricalciumphosphate (85% alpha-TCP and 15% beta-TCP), was inserted in 16 surgical defects crea ted in the tibia of goats. X-ray diffraction (XRD) and energy dispersi ve spectroscopy (EDS) showed that after 3 months of implantation the a lpha-TCP was transformed to hydroxyapatite (HA). Histological evaluati on revealed that the presence of cement stimulated the ingrowth of bon e compared with unfilled cavities. Active resorption and remodelling o f cement particles was observed. The cement did not evoke an inflammat ory reaction. At 6 months after implantation no further changes in the composition of the cement occurred. All remaining material was surrou nded by mature bone.