title: Assessment of the survival and the clinical results of Stanmore total knee replacements.
abstract: We review 210 Stanmore knee replacements in 163 patients to assess the survival of the prostheses and the long-term results. The annual rate of failure reached a maximum of 4.6% in the fourth year after operation; thereafter it declined to reach zero by the eighth year. Between two and eight years after operation, 66.3% of the surviving knees were completely free of pain and 30.2% had mild retropatellar pain. Fixed flexion deformities present before operation were completely corrected in 73% of the knees, and varus or valgus deformities were invariably corrected. Stability was always restored to unstable knees and 80.8% of knees flexed to 90 degrees or more after replacement. Aseptic loosening (8.1%), prosthetic infection (4.3%) and femoral fracture (2.9%) led to 8.5% of the prostheses being revised or removed over eight years. Modifications in prosthetic design and operative techniques have been introduced to minimise such complications in the future.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000497:Alloys / Q000627:therapeutic use; D001172:Arthritis, Rheumatoid / Q000601:surgery; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery; D007720:Knee Prosthesis / Q000009:adverse effects / Q000592:standards; D008297:Male; D008722:Methods; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery; D010148:Intractable Pain / Q000628:therapy; D011474:Prosthesis Design; D013997:Time Factors
chemical_list: D000497:Alloys