title: Progression of radiolucent lines in cementless twin-bearing low-contact-stress knee prostheses: a retrospective study.
abstract: 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.
authors.affiliation: Department of Orthopaedic Surgery, Medical School, University of Otago, Dunedin, New Zealand.
authors.forename: Nikolaus
authors.initials: N
authors.lastname: Aebli
authors.forename: Jörg
authors.initials: J
authors.lastname: Krebs
authors.forename: Daryl
authors.initials: D
authors.lastname: Schwenke
authors.forename: Timothy
authors.initials: T
authors.lastname: Hii
authors.forename: Ulrich
authors.initials: U
authors.lastname: Wehrli
mesh_terms: 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