[Femoro-patellar prosthesis. A retrospective study of 45 consecutive cases with a follow-up of 3-12 years].
Forty-five consecutive patients operated between 1986 and 1995 were evaluated to assess the long term results of patellofemoral arthroplasty. Revision had to be performed in 8 cases for the following reasons: loosening (3), lateral impingement (3), malposition (1) and persistent patella instability (1). Two groups of patients were identified based upon the preoperative assessment: 21 had primary osteoarthritis without anatomic malalignment (group C) and 24 had a history of patellofemoral instability and trochlear dysplasia demonstrated by clinical and radiological evaluation (group D). Only 43% of good results were found in group C whereas in group D, the percentage of good results was close to 83%. The most common cause of poor results in group C was the degenerative involvement of the femorotibial compartments (5 patients had to undergo total knee arthroplasty subsequently). For group D patients, femorotibial osteoarthritis was not a determinant factor as regards the outcome of patellofemoral arthroplasty. To the authors, it appears that the best indication for patellofemoral arthroplasty is femoropatellar osteoarthritis with malalignment in patients having a normal femorotibial axis even in the presence of femorotibial osteoarthritis as long as the latter does not exceed grade II.
De Cloedt
P
P
Clinique UCL Mont-Godinne, Yvoir, Belgique.
Legaye
J
J
Lokietek
W
W
D000328:Adult; D000368:Aged; D019643:Arthroplasty, Replacement / Q000009:adverse effects / Q000379:methods*; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005269:Femur / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000601:surgery; D007595:Joint Prosthesis / Q000009:adverse effects; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000150:complications / Q000601:surgery; D010009:Osteochondrodysplasias / Q000150:complications / Q000601:surgery; D010329:Patella / Q000601:surgery*; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome
Les prothèses fémoro-patellaires. Etude rétrospective de 45 cas successifs avec un recul de 3 à 12 ans.