Investigation of tensile strength of hydroxyapatite with various porosities by diametral strength test

It is appropriate to administer the diametral test to biomedical materials used in dental applications because stresses formed on dental implants are similar to those that formed in this test. To show this similarity, an experimental study of diametral strength testing of hydroxyapatite was performed. The influence of porosity on hydroxyapatite was investigated experimentally to determine how the diametral strength was affected. Hydroxyapatite was air sintered at 1100°C for 1 h with porosities ranging from 1 to 32%. The results indicated that hydroxyapatite with improved densificaron had higher diametral strength values. X-ray diffraction analysis showed that sintered samples were pure hydroxyapatite.