Timing of Surgery in Acute Anterior Cruciate Ligament Tears on the Return of Quadriceps Muscle Strength After Reconstruction Using an Autogenous Patellar Tendon Graft

To determine if patients who delayed anterior cruciate ligament reconstruction until a convenient time re gained quadriceps muscle strength allowing them to re turn to sports participation at a different rate than pa tients who had early surgery for anterior cruciate ligament reconstruction, we studied 143 patients who had the same surgical procedure and postoperative re habilitation program. Group I delayed surgery at a mean of 40 days after injury; Group II had early surgery at a mean of 11 days after injury. Statistically, Group I pa tients had significantly better mean quadriceps muscle strength at 2 months (P = 0.017) and at 4 months (P = 0.0055) postoperatively. At least 65% quadriceps muscle strength was achieved by 40 of the 50 patients (80%) tested in Group I at 2 months, allowing the pa tients to progress to sport-specific rehabilitation. Only 35 of the 66 patients (53%) tested in Group II were able to progress toward sports activities at 2 months. By 6 months, 29 of the 40 patients (73%) tested...