Non-operative treatment of the torn anterior cruciate ligament.

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Abstract
The purpose of this study was to assess and describe the status of twenty-four patients with a diagnosed tear of the anterior cruciate ligament who participated in a non-operative program of rehabilitation emphasizing strengthening of the hamstrings. The knees were evaluated by testing stability, strength, and range of motion; by roentgenographic examination; and by the patient's level of participation in sports. The patient's uninjured knee was used for comparison. The results showed a high incidence of anterior instability, but no significant differences in degenerative changes or range of motion. All patients returned to some sports participation, with fourteen (59 per cent) returning to their full preinjury level of participation. Higher levels of sports participation were found in the patients whose hamstrings strength was equal to or more than their quadriceps strength.

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