title: The long-term outcome of uncemented Low Contact Stress total knee replacement in patients with rheumatoid arthritis: results at a mean of 22 years.
abstract: We reviewed the long-term clinical and radiological results of 63 uncemented Low Contact Stress (LCS) total knee replacements (TKRs) in 47 patients with rheumatoid arthritis. The mean age of the patients at the time of surgery was 69 years (53 to 81). At a mean follow-up of 22 years (20 to 25), 12 patients were alive (17 TKRs), 27 had died (36 TKRs), and eight (ten TKRs) were lost to follow-up. Revision was necessary in seven patients (seven TKRs, 11.1%) at a mean of 12.1 years (0 to 19) after surgery. In the surviving ten patients who had not undergone revision (15 TKRs), the mean Oxford knee score was 30.2 (16 to 41) at a mean follow-up of 19.5 years (15 to 24.7) and mean active flexion was 105° (90° to 150°). The survival rate was 88.9% at 20 years (56 of 63) and the Kaplan-Meier survival estimate, without revision, was 80.2% (95% confidence interval 37 to 100) at 25 years.
authors.affiliation: Southern General Hospital, 1345 Govan Road, Glasgow G51 4TF, UK.
authors.forename: S G F
authors.initials: SG
authors.lastname: Abram
authors.forename: F
authors.initials: F
authors.lastname: Nicol
authors.forename: M G
authors.initials: MG
authors.lastname: Hullin
authors.forename: S J
authors.initials: SJ
authors.lastname: Spencer
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000401:mortality / Q000601:surgery*; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis / Q000706:statistics & numerical data*; D008875:Middle Aged; D011446:Prospective Studies; D011474:Prosthesis Design / Q000706:statistics & numerical data*; D011475:Prosthesis Failure; D012086:Reoperation / Q000706:statistics & numerical data*; D013314:Stress, Mechanical; D016019:Survival Analysis; D015996:Survival Rate; D016896:Treatment Outcome
keywords: Arthroplasty; Cementless; Knee; Outcomes; Rheumatoid arthritis; Survivorship; Total knee replacement; Uncemented