An in vitro mineralization study of hydrogen existence form and surface bioactivity of titanium / 实用口腔医学杂志

ABSTRACT

Objective:To investigate the relationship between surface hydrogen form and the bioactivity of titanium.Methods:Sandblast titanium was etched with the combination of sulfuric and hydrochloric acids(SLA group,n=3 ).Then etched titanium was heat at 450 ℃in air(SLA+HT group,n=3).Surface topography,roughness,hydrophility,surface chemical texture were observed. Finally,the titanium samples were soaked in body simulate fluid for 3 days,the mineral deposition properties were observed by X-ray diffraction.Results:Titanium hydride was formed on the titanium surface after etching.After heat treatment,surface texture and roughness were not changed,titanium hydride decomposed and hydrophility increased.More hydroxyapatite was found on the surface of the samples treated by SLA+HT and followed by SBF.Conclusion:Titanium hydride can not improve the bioactivity of titanium, heat treatment may increase the mineralization.