title: [An investigation on failure mechanisms of primary 327 hip arthroplasties].
abstract: OBJECTIVE
  To summarize the detailed failure mechanisms of revision hip arthroplasties and related risk factors.
  
  
  METHODS
  From November 1988 to July 2008 revision of total hip arthroplasties was performed in 327 patients. The medical history, clinical and imaging material and operation records were investigated.
  
  
  RESULTS
  Regarding revision as the end point of the study, the reasons for 327 revision arthroplasties were aseptic loosening in 226 hips (69.1%), infection in 52 hips (15.9%), periprosthetic fracture in 22 hips (6.7%), instability in 17 hips (5.2%), stem fracture in 5 hips (1.5%) and liner dissociation in 5 hips (1.5%).
  
  
  CONCLUSIONS
  The main failure mechanisms of primary hip arthroplasties are aseptic loosening and infection of implants, which could be attributed to improper selection of operation indications and implants and limitations to surgical philosophy and technique.
authors: Department of Adult Joint Reconstructive Surgery, Jishuitan Hospital, Beijing 100035, China.
authors: Sheng-Jun
authors: SJ
authors: Guo
authors: Yi-Xin
authors: YX
authors: Zhou
authors: Liang
authors: L
authors: Zhang
authors: Jian
authors: J
authors: Wu
authors: Ming
authors: M
authors: Lü
authors: Jing
authors: J
authors: Tang
authors: Li-Ang
authors: LA
authors: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D057068:Periprosthetic Fractures; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D012307:Risk Factors; D013530:Surgical Wound Infection; D017211:Treatment Failure