Operative procedures for the unstable patellae

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Since 1977, the operative procedures were used variously in ten cases of the unstable patellae. According to Ficat, they were classified as follows, 1) recurrent dislocation: 5 cases 2) recurrent subluxation: 4 cases 3) permanent dislocation: 1 case.Their ages ranged from 15 to 43 years (average 20 years).There were 2 males and 8 females.The interaval between onset and operation averaged 64 months (1 month to 312 months).The diagnosis was determined by the clinical findings the hypermobility of the patella-Q angle, and the findings of the tangencial views of the patella, arthrography and arthroscopy.The operative procedures were used as follows, a): a) release of the lateral retinaculum and a tightening of the medial retinaculum and capsule; 1 case.b): a) and the procedure of Elmslie-Trillat; 7 cases.c): b) and semitendinosus transfer; 1 case.d): b) and McCarroll; 1 case.The follow up period ranged from 7 to 21 months and averaged 13 months. The results were rated according to the Ficat's criteria, consequently, 2 cases were exellent, 7 good, and 1 fair.
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