title: [The effect of cryotreat on the wear resistance of the medium melting-point castable alloy].
abstract: OBJECTIVE
  The purpose of this study was to introduce cryotreat technique into prosthetic dentistry by investigating the wear resistance changes of SDA-II medium melting-point castable alloy before and after cryotreat.
  
  
  METHODS
  15 samples were divided into three groups, i.e. control group, cryotreat group, cryotreated plus post-cryogenic treat group. Weight loss measurement was used to examine the wear resistance.
  
  
  RESULTS
  For SDA-II medium melting-point castable alloy, cryotreat effectively improved its wearing resistance; so far as the wear resistance was concerned, the post-cryogenic treatment was unnecessary.
  
  
  CONCLUSIONS
  The results obtained above suggest that cryotreat was an effective method in enhancing the wear resistance of SDA-II medium melting-point castable alloy.
authors.affiliation: Department of Prosthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Zhao
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Zhu
authors.forename: Mengshi
authors.initials: M
authors.lastname: Chen
mesh_terms: D003080:Cold Temperature; D003722:Dental Alloys; D003799:Dental Stress Analysis; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D003722:Dental Alloys