Progression of radiolucent lines in cementless twin-bearing low-contact-stress knee prostheses: a retrospective study.
A total of 134 low-contact-stress (LCS) total knee arthroplasties (TKAs) with mobile meniscal bearings were implanted in 121 patients with a mean age of 74 years (range, 49-91 years) at the time of surgery. The radiographic results obtained from 91 prostheses at an average follow-up of 7.5 years (range, 4.8-9.6 years) showed that radiolucent lines (RLL) appeared most frequently near the tibial plateau (97%) and that most RLL were present immediately postoperatively (67%) or appeared within the first year (96%). RLL were predominantly nonprogressive (99%). Progressive RLL did not affect the fixation or stability of the prosthesis. There were no revisions for aseptic loosening. Cementless LCS TKA achieves excellent radiologic and clinical midterm results.
Aebli
Nikolaus
N
Department of Orthopaedic Surgery, Medical School, University of Otago, Dunedin, New Zealand.
Krebs
Jörg
J
Schwenke
Daryl
D
Hii
Timothy
T
Wehrli
Ulrich
U
D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011859:Radiography; D016059:Range of Motion, Articular; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome