PURPOSE: This study determined whether elbow stability could be restored with open reduction and internal fixation (ORIF) of type II coronoid fractures and evaluated the role of collateral ligament repair. METHODS: Passive varus and valgus and simulated active vertical motion were performed using an in vitro elbow motion simulator. Varus/valgus angle and internal/external rotation were measured with the coronoid intact, with 50% removed, and after ORIF. Testing was performed with the collateral ligaments detached and repaired. RESULTS: Vertical: stability was normal when both the lateral collateral ligament (LCL) and medial collateral ligament (MCL) were repaired, irrespective of the coronoid state. Kinematics were altered with a repaired LCL, incompetent MCL, and type II coronoid fracture (P < .05). Varus: LCL repair restored coronal stability but did not restore internal rotation (P < .05). CONCLUSIONS: These findings suggest that repair of type II coronoid fractures and injured collateral ligaments should be performed where possible. Over-tensioning the LCL, in the setting of MCL and coronoid deficiency, may contribute to instability.
PURPOSE: This study determined whether elbow stability could be restored with open reduction and internal fixation (ORIF) of type II coronoid fractures and evaluated the role of collateral ligament repair. METHODS: Passive varus and valgus and simulated active vertical motion were performed using an in vitro elbow motion simulator. Varus/valgus angle and internal/external rotation were measured with the coronoid intact, with 50% removed, and after ORIF. Testing was performed with the collateral ligaments detached and repaired. RESULTS: Vertical: stability was normal when both the lateral collateral ligament (LCL) and medial collateral ligament (MCL) were repaired, irrespective of the coronoid state. Kinematics were altered with a repaired LCL, incompetent MCL, and type II coronoid fracture (P < .05). Varus: LCL repair restored coronal stability but did not restore internal rotation (P < .05). CONCLUSIONS: These findings suggest that repair of type II coronoid fractures and injured collateral ligaments should be performed where possible. Over-tensioning the LCL, in the setting of MCL and coronoid deficiency, may contribute to instability.
Authors: Gijs I T Iordens; Dennis Den Hartog; Esther M M Van Lieshout; Wim E Tuinebreijer; Jeroen De Haan; Peter Patka; Michael H J Verhofstad; Niels W L Schep Journal: Clin Orthop Relat Res Date: 2014-10-29 Impact factor: 4.176
Authors: Francesco Luceri; Davide Cucchi; Paolo Angelo Arrigoni; Pietro Simone Randelli; Enrico Rosagrata; Carlo Eugenio Zaolino; Marco Viganò; Laura de Girolamo; Andrea Zagarella; Michele Catapano; Mauro Battista Gallazzi Journal: Indian J Orthop Date: 2021-05-09 Impact factor: 1.251