[Surgical treatment of medial collateral ligament laxity complicated by old cruciate ligament injury of the knee].

OBJECTIVE

To investigate the therapeutic effect of transposition of semitendinosus tendon combined with femur insertion of medial collateral ligament (MCL) and reconstruction of anterior cruciate ligament (ACL) with autograft bone-patellar tendon-bone in treatment of MCL laxity complicated by ACL injury of the knee.

METHODS

Twenty patients (20 knees), 14 male and 6 female, aged 32.6 (16-64), 1 case at grade II and 19 cases at grade III according to X ray classification, all cases at grade III by MRI evaluation, and with preoperative Lysholm knee joint score of 48.9 (35-65), underwent transposition of semitendinosus tendon combined with femur insertion of medial collateral ligament (MCL) and reconstruction of anterior cruciate ligament (ACL) with autograft bone-patellar tendon-bone. Followed up was conducted for 19.2 (6-59) months.

RESULTS

The postoperative Lysholm score was 83.9 (50-96). Eighteen of the 20 patients obtained an excellent result with good function of the knee joint except one case with osteoarthritis and one case with limited range of motion of the knee (90 degree), and the good-to-excellent rate was 90%.

CONCLUSION

Reconstruction with autograft of the bone-patellar tendon-bone and transposition of semitendinosus tendon combined with femur insertion of MCL proximal transfer is a reliable treatment method for MCL laxity complicated by old ACL injury of the knee.