title: [Research progress of backside wear in acetabular liners].
abstract: OBJECTIVE
  To summarize the occurrence mechanism of backside wear, the method of evaluating backside surface damage, the relationship between backside wear and osteolysis in acetabulum, and the approach to reduce backside wear in total hip arthroplasty with modular acetabulum prosthesis.
  
  
  METHODS
  The recent articles about the backside wear in acetabular liners were extensively reviewed.
  
  
  RESULTS
  Backside wear in acetabular liners is connected with micromotion between the liner and the shell, rough interface, thickness of the liner, and impingement. The methods to evaluate backside wear damage are only proceeded in revised acetabular liners. Backside wear can generate polyethylene particles that is likely related to the process of osteolysis in acetabulum through the screw holes of metallic shell. To reduce backside wear between the liner and the shell, measures such as improved locking mechanisms, smooth inner metallic shell, maximized shell liner conformity, improving the quality of polyethylene, and reducing impingement can be taken.
  
  
  CONCLUSIONS
  There is no method of evaluating the backside wear in vivo. The relationship between backside wear and osteolysis in acetabulum as well as aseptic loosening of acetabulum prosthesis is controversial.
authors.forename: Kunpeng
authors.initials: K
authors.lastname: Zhou
authors.forename: Shuqiang
authors.initials: S
authors.lastname: Li
authors.forename: Chen
authors.initials: C
authors.lastname: Yang
authors.forename: Xin
authors.initials: X
authors.lastname: Qi
mesh_terms: D000077:Acetabulum; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D019544:Equipment Failure Analysis / Q000379:methods; D006622:Hip Prosthesis; D006801:Humans; D008422:Materials Testing; D008670:Metals; D010014:Osteolysis / Q000209:etiology / Q000517:prevention & control; D011095:Polyethylenes; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013314:Stress, Mechanical
chemical_list: D008670:Metals; D011095:Polyethylenes