The effect of lateral meniscectomy on motion of the knee.

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With the use of a five-degrees-of-freedom testing apparatus, we studied changes in the motion of the knees of cadavera after isolated resection of the lateral meniscus, with section of the anterior cruciate ligament and resection of the medial meniscus. Primary anterior and posterior translations were not affected by lateral meniscectomy. When lateral meniscectomy was done in addition to resection of the anterior cruciate ligament, anterior translation did not increase compared with that measured after isolated section of the anterior cruciate ligament. However, when the means of the paired differences in anterior translation were compared, a significant increase was found. This differed from the results after excision of the medial meniscus and section of the anterior cruciate ligament; in that situation, medial meniscectomy resulted in significantly more anterior translation.

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