title: [Modes of medium failures after total hip arthroplasty in China: a single-center retrospective study].
abstract: OBJECTIVE
  To explore the modes of medium failures after total hip arthroplasty (THA) in China and compare our results with foreign countries.
  
  
  METHODS
  Retrospective reviews were conducted for the causes of medium failures of 137 revision THAs between January 2007 and December 2013. The causes of failure included infection, aseptic loosening, dislocation, periprosthetic fracture, implant-related failure, heterotopic ossification and liner wear.
  
  
  RESULTS
  The causes in a decreasing order were aseptic loosening (55.5%, 76/137), infection (31.4%, 43/137), liner wear (6.6%, 9/137), periprosthetic fracture (5.1%, 7/137) and dislocation (1.5%, 2/137).
  
  
  CONCLUSIONS
  The top three domestic causes of medium failure after primary THA are aseptic loosening, infection and liner wear.
authors: Department of Orthopedics, Chinese PLA General Hospital, Beijing 100853, China.
authors: Ti
authors: T
authors: Zhang
authors: Department of Orthopedics, Chinese PLA General Hospital, Beijing 100853, China.
authors: Chong
authors: C
authors: Zheng
authors: Department of Orthopedics, Chinese PLA General Hospital, Beijing 100853, China.
authors: Haiyang
authors: H
authors: Ma
authors: Department of Orthopedics, Chinese PLA General Hospital, Beijing 100853, China. Email: suncjdoctor@163.com.
authors: Changjiao
authors: C
authors: Sun
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D002681:China; D006622:Hip Prosthesis; D006801:Humans; D057068:Periprosthetic Fractures; D011475:Prosthesis Failure; D012189:Retrospective Studies