Socket wear in ceramic-on-polyethylene total hip arthroplasties: fixed versus rotating heads.
We measured radiographically the polyethylene socket wear in 34 hip prostheses with a 32 mm Al2O3-ceramic head with a rotating bearing and in 37 prostheses with a "fixed" ceramic head. The mean follow-up was 12 years in both groups. The mean annual linear wear of the polyethylene was 0.034 and 0.069 mm, respectively, (Mann-Whitney U-test p < 0.0001) in the "rotation" and the "fixed" group. A rotating bearing between the head and neck in a modular total hip system seems to reduce socket wear as compared to fixed taper junctions.
Department of Orthopaedic Surgery, Academic Medical Centre, University of Amsterdam, The Netherlands.
H M
HM
van der Vis
R
R
Zwartelé
H M
HM
Schüller
H K
HK
Doets
R K
RK
Marti
D001672:Biocompatible Materials; D001843:Bone Cements; D002516:Ceramics; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D008422:Materials Testing; D015588:Observer Variation; D011095:Polyethylenes; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D018709:Statistics, Nonparametric
D001672:Biocompatible Materials; D001843:Bone Cements; D011095:Polyethylenes