Comparison of migration in modular sockets with ceramic and polyethylene inlays.
This study compared migration in 73 cementless total hip arthroplasties (THAs) with either alumina ceramic (n = 23) or polyethylene (n = 50) inlays; prosthesis sockets and stems were identical except for the inlays. After 7 years of follow-up, 5 sockets (4 with ceramic and 1 with polyethylene inlays) had been revised an average of 63.3 months (range: 49-81 months) after implantation, and survival analysis showed a significantly higher revision rate for sockets with ceramic inlays (89 +/- 6%) versus polyethylene inlays (98.2 +/- 1.7%) (P = .032). Migration analysis of the first three postoperative years revealed significantly higher vertical migration in sockets with ceramic inlays (P = .047), in patients aged <60 years (P = .02), and in osteoporotic type C bone (A versus C, P = .0071 and B versus C, P = .0004).
Böhler
M
M
General Orthopedic Department, Orthopedic Hospital Vienna-Speising, Vienna, Austria.
Schachinger
W
W
Wölfl
G
G
Krismer
M
M
Mayr
G
G
Salzer
M
M
D002516:Ceramics; D005500:Follow-Up Studies; D005548:Foreign-Body Migration; D006622:Hip Prosthesis; D006801:Humans; D008422:Materials Testing; D020959:Polyethylene; D011474:Prosthesis Design; D013997:Time Factors
D020959:Polyethylene