|About this Abstract
||Materials Science & Technology 2011
||Next Generation Biomaterials
||Enhancement of Apatite Formation by Oxynitridation of Ti Substrate
||Masami Hashimoto, Kazumi Kashiwagi, Satoshi Kitaoka
|On-Site Speaker (Planned)
Biomedical titanium metals subjected to gas under precisely regulated oxygen partial pressures (PO2) from 10-18 to 105 Pa at 973 K for 1 hour were soaked in a simulated body fluid at 37 oC for up to 7 days. The most apatite was formed on the titanium metal heated under a PO2 of 10-14 Pa, followed by the sample heated under a PO2 of 104 Pa. The titanium metal heated under a PO2 of 105 Pa experienced far less apatite formation than either of the former two titanium samples. Similarly, very little weight change was observed for the titanium metal heated under a PO2 of 10-18 Pa. Nitrogen (N)-doped TiO2 (Interstitial N) was formed on Ti under a PO2 of 10-14 Pa. The effect of nitrogen on apatite formation was assessed using X-ray photoelectron spectroscopy, secondary ion mass spectrometry or surface charge of heat-treated titanium samples.