[Rupture of the anterior cruciate ligament: a frequently unrecognized cause of failure of unicompartmental knee prostheses. Apropos of a series of 79 Lotus prostheses with a follow-up of more than 5 years].
Out of 386 unicompartmental prostheses inserted in the Orthopaedic Centre in Dracy Le Fort between 1977 and 1986, 79 cases in 68 patients with a follow-up equal to or more than five years and a mean of seven years were able to be reviewed. This study showed that 75 per cent of knees had a satisfactory result and 25 per cent were failures. Apart from well-recognised causes of failure such as rheumatoid arthritis, overcorrection or the use of a six millimetre tibial plateau, the authors discovered a frequent cause not clearly recorded in the literature--that is anterior cruciate laxity. This situation was found retrospectively in the pre-operative weight-bearing radiographs. Out of 15 knees showing a pre-operative laxity equal to or greater than 10 mm in the lateral radiograph, 13 were failures and 10 were operated on again after a mean of three-and-a-half years. An investigation of anterior cruciate laxity should be made systematically by weight-bearing lateral radiographs, if necessary with stress views, before recommending a unicompartmental prosthesis.
Centre Orthopédique, Dracy Le Fort.
G
G
Deschamps
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B
Lapeyre
D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint; D007720:Knee Prosthesis; D008023:Ligaments, Articular / Q000293:injuries*; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000000981:diagnostic imaging / Q000601:surgery; D011859:Radiography; D012086:Reoperation; D012421:Rupture
La rupture du ligament croisé antérieur: une cause d'échec souvent méconnue des prothèses unicompartimentales du genou. A propos d'une série de 79 prothéses Lotus revues au-delà de 5 ans.