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Reconstruction of the anterior cruciate ligament with an intra-articular patellar tendon graft and an extra-articular tenodesis. Results after six years.

We describe 74 patients with disabling instability of the knee due to isolated anterior cruciate deficiency. None responded to conservative measures or correction of internal derangements. All patients were treated by replacement of the anterior cruciate ligament with the medial third of the patellar tendon as a free graft, supplemented by an extra-articular MacIntosh lateral reconstruction. A satisfactory outcome was found in 93% of knees after an average of 70 months follow-up. Cast immobilisation after operation, the interval between injury and reconstruction, the age of the patient and the severity of symptoms before reconstruction had no significant effect on the final outcome.