Abstract
Sintered bodies of hydroxyapatite, derived from calcinated bovine bone (BHA) and doped with 0.5 and 1 wt% Y 2 O 3 , were prepared. Measurements of density, compression strength, and microhardness, along with scanning electron microscopy (SEM) and X-ray diffraction (XRD) were carried out. The experimental results showed that BHA doping with yttria favors formation of glassy phase, which advances sintering and results in a dense and reinforced BHA matrix. The best mechanical properties were achieved after sintering at 1200°C for compressive strength (82MPa) and 1300°C for microhardness (672HV). These results are better than pure BHA or composites of hydroxyapatite with Y 2 O 3 -stablized zirconia, qualifying yttria (as dopant of BHA) for further in vitro and in vivo experimentation.