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[Effects of different polishing methods on surface roughness of pure titanium castings]
1Arrail Dental, Beijing 100080, China.
Objective:
To evaluate the effects of different polishing methods on surface roughness of pure titanium castings.
Methods:
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.
Results:
The effects of mechanic polishing with aluminium oxide or chromium oxide were acceptable. Surface smoothness was improved with acid treatment followed by electrolytic polishing.
Conclusion:
Aluminium oxide and chromium oxide can be used in mechanic polishing of pure titanium castings, and improvement should be made on electrolytic polishing methods.
