Arch Hand Microsurg 2018; 23(2): 69-77  
Posterolateral Rotatory Instability of the Elbow Joint
In Hyeok Rhyou
Department of Orthopaedic Surgery, Upper Extremity and Microsurgery Center, Pohang Semyeong Christianity Hospital, Pohang, Korea
Correspondence to: In Hyeok Rhyou
Department of Orthopedic Surgery, Upper Extremity and Microsurgery Center, Semyeong Christianity Hospital, 351 Posco-daero, Nam-gu, Pohang 37816, Korea
TEL: +82-54-289-1765, FAX: +82-54-289-1766, E-mail: osdrrih@gmail.com
Received: May 1, 2018; Revised: May 3, 2018; Accepted: May 7, 2018; Published online: June 1, 2018.
© Korean Society for Surgery of the Hand, Korean Society for Microsurgery, and Korean Society for Surgery of the Peripheral Nerve. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Posterolateral rotatory instability (PLRI) of the elbow joint is not rare and has been known to be caused by the insufficiency of the lateral ulnar collateral ligament (LUCL), since the first description by O’Driscoll et al. However, many anatomical, clinical, and experimental studies cast doubts on the main role of the LUCL and highlight the lateral collateral ligament complex consisting of radial collateral ligament, LUCL, annular ligament, and accessory collateral ligament all work together to prevent PLRI. Because the original LUCL reconstruction technique does not uniformly lead to good clinical results, new techniques based on biomechanical background have been developed and attempted to obtain better results. Here, review of the anatomical and biomechanical knowledge about the PLRI including the basic concept till now is presented to provide better understanding and management of PLRI.
Keywords: Posterolateral, Rotatory, Instability, Elbow


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