先天性しつがい骨脱臼の治療経験

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  • Clinical Study for the Congenital Dislocation of the Patella

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Since 1971, we have experience on eight joints with congenital dislocation of patella in five patients, that were classified as follows by the Kataoka's classification:<br>1) Three habitual dislocations<br>2) One recurrent dislocation<br>3) Four permanent dislocations<br>The age of the patients ranged from eight to eighteen years, two were males and three were females. The interval between onset and operation averaged five years.<br>The following procedures were performed:<br>a) Modified Hauser's method: one joint<br>b) Campbell's and Roux-Goldthwait's method: two joints<br>c) Semitendinosus transfer: three joints<br>The follow up period ranged from one to fifty one months, and averaged 24.4 months. The results were rated by the Macnab's criteria. All cases were rated as “excellent.” Many procedures had been advocated for congenital dislocation of the patella, but all of these methods only maintained the patella statically in normal position. In 1971, Uesaki, et al. described a new procedure for recurrent dislocation of the patella. The characteristic of this method was to maintain the patella dynamically in normal position by transfer of the semitendinosus tendon.<br>In the phase of knee flexion which usually patella dislocates, the transferred semitendinosus (which originally acts as the knee flexor) maintains the patella “dynamically” in normal position.

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