Suture‐Augmented Lateral Ulnar Collateral Ligament and Radial Collateral Ligament Reconstruction for Subacute and Chronic Posterolateral Rotatory Instability

Posterolateral rotatory instability of the elbow results from injury to the lateral collateral ligament complex, most often involving the lateral ulnar collateral ligament (LUCL). In the subacute or chronic setting, LUCL reconstruction is the technique of choice, although traditional graft-based techniques can be limited by morbidity and delayed recovery. Internal bracing offers improved early stability and graft protection. This Technical Note describes a reproducible technique for LUCL and radial collateral ligament reconstruction using semitendinosus allograft with suture tape augmentation. The graft is anatomically positioned to reconstruct both the LUCL and radial collateral ligament origins, restoring lateral collateral ligament complex integrity. This method is designed for subacute or chronic posterolateral rotatory instability and aims to minimize graft elongation and support early mobilization.