The procedure involves freeing a strip of fascia lata from the side of the thigh, but leaving it tethered at its lower end to the tibia, and then using this strip to reinforce the side of the joint where it is tautened and re-attached at the top to the side of the femur with a fixation device. The procedure is usually only considered in patients with high risk of graft failure after ACL or multiligament instability.
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The Stability study: a protocol for a multicenter randomized clinical trial comparing anterior cruciate ligament reconstruction with and without Lateral Extra-articular Tenodesis in individuals who are at high risk of graft failure. Getgood A, Bryant D and Firth A. BMC Musculoskelet Disord. 2019; 20: 216.
Modified Lemaire extra-articular stabilisation of the knee for the treatment of anterolateral instability combined with diffuse pigmented villonodular synovitis: a case report. Farthing C, Lang G, Feucht MJ, Südkamp NP and Izadpanah K. BMC Musculoskelet Disord. 2018; 19: 330.