OBJECTIVE: To carry out a biomechanical study of four techniques for fixation of four-part humeral head fractures. METHODS: The fracture was reproduced in 40 plastic humeri, divided into groups of ten according to the fixation technique, each one employing different fixation resources, in different configurations. The humeral models were mounted on an aluminum scapula, with leather straps simulating the rotator cuff tendons, and submitted to bending and torsion tests in a universal testing machine, using relative stiffness as an evaluation parameter. Assemblies with intact humeri were analyzed for comparison. RESULTS: The biomechanical behavior of the fixation techniques varied within a wide range, where the assemblies including the DCP plate and the 4.5mm diameter screws were significantly more rigid than the assemblies with the Kirschner wires and the 3.5mm diameter screws. CONCLUSION: The four fixation techniques were able to bear loads compatible with the physiological demand, but those with higher relative stiffness should be preferred for clinical application. LABORATORY INVESTIGATION: .
OBJECTIVE: To carry out a biomechanical study of four techniques for fixation of four-part humeral head fractures. METHODS: The fracture was reproduced in 40 plastic humeri, divided into groups of ten according to the fixation technique, each one employing different fixation resources, in different configurations. The humeral models were mounted on an aluminum scapula, with leather straps simulating the rotator cuff tendons, and submitted to bending and torsion tests in a universal testing machine, using relative stiffness as an evaluation parameter. Assemblies with intact humeri were analyzed for comparison. RESULTS: The biomechanical behavior of the fixation techniques varied within a wide range, where the assemblies including the DCP plate and the 4.5mm diameter screws were significantly more rigid than the assemblies with the Kirschner wires and the 3.5mm diameter screws. CONCLUSION: The four fixation techniques were able to bear loads compatible with the physiological demand, but those with higher relative stiffness should be preferred for clinical application. LABORATORY INVESTIGATION: .
Authors: Eduardo F Carrera; Fabio A Nicolao; Nicola Archetti Netto; Renato L Carvalho; Fernando B Dos Reis; Enrico José Giordani Journal: J Shoulder Elbow Surg Date: 2008-03-24 Impact factor: 3.019
Authors: Michael J Gardner; Yoram Weil; Joseph U Barker; Bryan T Kelly; David L Helfet; Dean G Lorich Journal: J Orthop Trauma Date: 2007-03 Impact factor: 2.512
Authors: Paulo Ottoni di Tullio; Vincenzo Giordano; Eder Souto; Hugo Assed; João Paulo Chequer; William Belangero; José Ricardo L Mariolani; Hilton A Koch Journal: PLoS One Date: 2019-07-30 Impact factor: 3.240