Effects of different polishing methods on surface roughness of pure titanium castings / 华西口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To evaluate the effects of different polishing methods on surface roughness of pure titanium castings.</p><p><b>METHODS</b>35 pure titanium castings were devided into 7 groups, used for control, mechanic polishing and electrolytic polishing, respectively. Surface roughness (Ra value) of each castings was measured with a profilometer. Surface microstructure was studied by a scaning electron microscopy, and the weight loss (Wt%) and height loss on unit area (H) before and after polishing was calculated.</p><p><b>RESULTS</b>The effects of mechanic polishing with aluminium oxide or chromium oxide were acceptable. Surface smoothness was improved with acid treatment followed by electrolytic polishing.</p><p><b>CONCLUSION</b>Aluminium oxide and chromium oxide can be used in mechanic polishing of pure titanium castings, and improvement should be made on electrolytic polishing methods.</p>