Survivorship analysis of the "Performance" total knee replacement--7-year follow-up.
We present the results of a prospective study in which 32 "Performance" total knee replacements were implanted with a mean follow-up period of 6.5 years. Survival analysis showed 89% survival at 7 years. Of those knees that survived to follow-up 80% were pain free or had mild pain when climbing stairs and only 1 knee was unable to flex beyond 100 degrees. Eighty-six percent of patients were able to walk unlimited distances and all knees had a statistically significant improvement in the knee evaluation scores at follow-up. There was no evidence of loosening or migration in the surviving knees.
Department of Trauma and Orthopaedics, Imperial College School of Medicine, Central Middlesex Hospital, London, UK. jcalder@rpms.ac.uk
J D
JD
Calder
N
N
Ashwood
J P
JP
Hollingdale
D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000295:instrumentation*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis / Q000009:adverse effects / Q000592:standards*; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D010146:Pain / Q000209:etiology; D011446:Prospective Studies; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D016019:Survival Analysis; D016896:Treatment Outcome