PL dislocation is thought to start from the medial side in contrary to PM dislocation beginning at the lateral side. If the disengagement of the coronoid process is not completed due to the insufficient valgus/varus distraction, a coronoid fracture will develop at the same time as the elbow dislocation during PFER.
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.
Purpose Although reconstruction of the lateral ulnar collateral ligament (LUCL) has been considered the procedure of choice for posterolateral rotatory instability (PLRI), recent studies have reported that the entire lateral collateral ligament complex (LCLC), rather than its posterior part only, contributes to preventing PLRI. Thus, it was hypothesized that dual reconstruction of the radial collateral ligament (RCL) and LUCL for the treatment of elbow PLRI could provide favourable clinical results regardless of the mechanism of injury. Methods This retrospective study reviewed the clinical results of 21 patients who underwent dual reconstruction of the RCL and LUCL between 2011 and 2016. Functional outcomes were assessed using the numeric rating scale (NRS) score, Mayo Elbow Performance Score (MEPS), quick Disabilities of the Arm, Shoulder, and Hand (quick DASH) score, and manual varus instability. To identify any diference in outcomes according to the aetiologies for LCLC insuiciency, our patients were divided into LCLC insuiciency associated with elbow dislocation and that with lateral epicondylitis. Results At a median follow-up of 27 months (range 13-65 months), all patients showed resolved instability and achieved a functional arc of motion. In addition, lateral pivot shift tests were negative in all patients. The median MEPS signiicantly improved after surgery from 70 (range 60-75) to 85 (range 75-100) (p < 0.001), while the median quick DASH score improved from 38.6 (range 26.6-54.5) to 11.4 (range 0-34.1) (p < 0.001). Clinical outcomes according to the aetiology of LCLC insuiciency were not signiicantly diferent except for the NRS score.
ConclusionThe results suggest that the dual reconstruction technique leads to a clinical outcome similar to that of conventional LUCL reconstruction in LCLC insuiciency regardless of aetiology. In addition, the dual reconstruction technique was technically easier than the conventional LUCL reconstruction technique and may be a potential alternative when a bone tunnel created at the proximal ulna by the original technique has failed. Level of evidence IV.
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