Authors:

Luke V. Tollefson, B.S., Evan P. Shoemaker, B.A., Matthew T. Rasmussen, M.D., Dustin R. Lee, M.D., and Robert F. LaPrade, M.D., Ph.D.

Abstract:

The medial collateral ligament (MCL) and the posterior oblique ligament (POL) are 2 of the main structures of the posteromedial corner of the knee. The MCL is important for valgus stability, whereas the POL is important for rotational stability. In cases of high-grade injury (grade 3) or when conservative treatment has failed, surgical intervention should be explored. Reconstruction is typically recommended over repair; however, there is still no consensus in the literature on the best reconstruction technique. This Technical Note describes an anatomic reconstruction of the posteromedial corner using a tibialis anterior allograft for the MCL and a semitendinosus allograft for the POL in the setting of a high-grade medial knee injury.

Video Credit as seen in Arthroscopy Techniques: Luke V. Tollefson, B.S., Evan P. Shoemaker, B.A., Matthew T. Rasmussen, M.D., Dustin R. Lee, M.D., and Robert F. LaPrade, M.D., Ph.D.

Abstract Continued:

Two main structures of the posteromedial corner (PMC) of the knee include the medial collateral ligament (MCL) and the posterior oblique ligament (POL).1 The MCL is the main restraint to valgus stress of the knee and the posterior oblique ligament (POL) is important for rotational stability of the knee.2 The MCL is one of the most injured ligaments of the knee but often does not require surgery. In cases of grade 1-2 MCL injuries, conservative treatment is attempted first and is often successful.3 In cases in which conservative treatment fails or in grade 3 injuries, especially with valgus gapping in extension, surgical reconstruction is recommended to restore the stability of the knee.3
Various reconstruction and repair techniques have been proposed in the literature4, 5, 6; however, repair has been reported to have greater rates of arthrofibrosis and failure at 2-year follow-up compared with reconstruction.5 Reconstruction typically is recommended for high-grade injuries, but there is lack of consensus on the optimal technique with differences in graft selection and fixation. This technique describes an anatomic reconstruction of the MCL and POL with allograft in the setting of a high-grade PMC injury.

You may download the study here: Anatomic Reconstruction of the Medial Collateral Ligament and the Posterior Oblique Ligament With Allograft for High-Grade Valgus Laxity