Microstructure and mechanical properties of sintered enamel hydroxyapatite

The influence of sintering temperature on the microstructure and the mechanical properties (i.e. compressive strength and microhardness) of samples of calcinated human enamel was investigated. The experimental results indicate a low densification regime after sintering at low temperatures (1000 °C, 1100 °C) and a high densification regime after sintering at higher temperatures (1200 °C, 1300 °C). With respect to earlier studies, high mechanical properties were achieved. The enhancement of mechanical properties was attributed to the presence of fluorine traces in enamel.