title: [Meta-analysis of the role of two common prostheses in total hip replacement].
abstract: OBJECTIVE
  To systematically review the role of two common prostheses(metal on metal and metal on polythene)in total hip replacement.
  
  
  METHODS
  Studies on two prostheses(metal on metal and metal on polythene)in total hip replacement were searched in databases including PubMed, EMBASE, the Cochrane library, CNKI database, WANFANG database, and VIP database using key words including"metal on metal", "metal on polythene", and "total hip replacement". Meta-analysis was performed using RevMan 5.2 software.
  
  
  RESULTS
  Metal on metal group was superior to metal on polythene group in terms of Harris function evaluation(WMD＝4.40, 95%CI: 3.50-5.31, P<0.01), operation time(WMD＝6.82, 95%CI: 4.50-9.13, P<0.01), whereas other indicators showed no significant difference between these two groups.
  
  
  CONCLUSIONS
  Compared with the prosthesis, metal on metal is better than metal on polythene in improving the Harris function when applied for total hip replacement. However, more high-quality large-scale randomized controlled trials are required to further verify it.
authors.affiliation: Department of Orthopedics One, Yanbian University Hospital, Yanji, Jilin 133000, China.
authors.forename: Shi-peng
authors.initials: SP
authors.lastname: Yang
authors.affiliation: Department of Orthopedics One, Yanbian University Hospital, Yanji, Jilin 133000, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Jin
authors.affiliation: Department of Orthopedics One, Yanbian University Hospital, Yanji, Jilin 133000, China.
authors.forename: Cheng-fu
authors.initials: CF
authors.lastname: Li
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D006801:Humans; D019736:Prostheses and Implants