title: [Comparative study of sensitivity of different dental metal materials].
abstract: OBJECTIVE
  To compare the sensitivity of different dental metal materials, in order to provide references for choosing of dental metal materials.
  
  
  METHODS
  Patch test was performed on 92 patients wearing dental metal prosthesis. Pearson Chi-square test, corrected Chi-square test and Fisher exact test were used for statistical analysis with SPSS17.0 software package.
  
  
  RESULTS
  (1)The sensitivity rates of different metal materials were different. The allergy rate of nickel (Ni) was the highest (22.8%), while the allergy rate of aluminum (Al) was 0. (2)More women were allergic to both palladium (Pd) and nickel (Ni) than men with significant difference (P>0.05). (3)Women with ear piercing were more allergic to nickel (Ni), but there was no significant correlation between ear piercing and nickel allergy (P>0.05).(4)There was cross reaction between nickel(Ni)and palladium (Pd), 83.3% of palladium (Pd) allergy patients were allergic to nickel (Ni), while 47.6% of nickel(Ni) allergy patients were allergic to palladium (Pd). (5)Patch test had a delayed reaction.
  
  
  CONCLUSIONS
  Dental metal materials have certain allergies, women are more allergic to both palladium (Pd) and nickel (Ni) than men, with significant difference. Patch test may have a delayed reaction. If necessary, observation for 96 h, 7 days or even longer time, are needed to exclude false positivity. Supported by Research Fund of Science and Technology Committee of Shanghai Municipality (10411950900).
authors.affiliation: Department of Stomatology, Huashan Hospital, Fudan University. Shanghai 200040;China.E-mail:18918505537@163.com.
authors.forename: Yue
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiao-ping
authors.initials: XP
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Wu
authors.forename: Yue
authors.initials: Y
authors.lastname: Hu
authors.forename: Xia
authors.initials: X
authors.lastname: Dou
authors.forename: Hong-ying
authors.initials: HY
authors.lastname: Sun
authors.forename: Ya-tong
authors.initials: YT
authors.lastname: Ding
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
mesh_terms: D017266:Dental Prosthesis; D005260:Female; D006801:Humans; D006967:Hypersensitivity; D008297:Male; D008670:Metals; D009532:Nickel; D010165:Palladium; D010328:Patch Tests
chemical_list: D008670:Metals; D010165:Palladium; D009532:Nickel