Recent studies have found that the radial collateral ligament (RCL) plays a key role in the lateral stability of the elbow joint, and there is no truly isometric location for LUCL tendon graft reconstruction tunnels using the original technique. However, no report has been issued on the treatment including RCL reconstruction and the modification of LUCL reconstruction in patients with posterolateral rotatory instability (PLRI). Three patients with PLRI were treated using two different ways and produced good results. First, dual reconstruction of the LUCL and RCL was performed, and second, the insertion of the reconstructed LUCL was shifted to the AL instead of to the original ulna to produce a more flexible isometric point setting. We want to report on the management of PLRI by dual reconstruction of the RCL and LUCL and a modification of the original technique of LUCL reconstruction.
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