title: [Effects of different polishing methods on surface roughness of pure titanium castings].
abstract: 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.
  
  
  CONCLUSIONS
  Aluminium oxide and chromium oxide can be used in mechanic polishing of pure titanium castings, and improvement should be made on electrolytic polishing methods.
authors.affiliation: Arrail Dental, Beijing 100080, China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Li
authors.forename: Mao-Chun
authors.initials: MC
authors.lastname: Xiao
mesh_terms: D000537:Aluminum Oxide; D003775:Dental Polishing; D008422:Materials Testing; D013499:Surface Properties; D014025:Titanium
chemical_list: D014025:Titanium; D000537:Aluminum Oxide