%0 Journal Article
%T Biomechanical properties of a novel biodegradable magnesium-based interference screw
%A Arne Lucas
%A Christoph Becher
%A Hanna Meyer
%A Henning Windhagen
%A Marco Ezechieli
%A Max Ettinger
%A Patrick Helmecke
%A Tilman Calliess
%J -
%D 2016
%R https://doi.org/10.4081/or.2016.6445
%X Magnesium-based interference screws may be an alternative in anterior/posterior cruciate ligament reconstruction. The well-known osteoconductive effects of biodegradable magnesium alloys may be useful. It was the purpose of this study to evaluate the biomechanical properties of a magnesium based interference screw and compare it to a standard implant. A MgYREZr-alloy interference screw and a standard implant (Milagro£¿; De Puy Mitek, Raynham, MA, USA) were used for graft fixation. Specimens were placed into a tensile loading fixation of a servohydraulic testing machine. Biomechanical analysis included pretensioning of the constructs at 20 N for 1 min following cyclic pretensioning of 20 cycles between 20 and 60 N. Biomechanical elongation was evaluated with cyclic loading of 1000 cycles between 50 and 200 N at 0.5 Hz. Maximum load to failure was 511.3¡À66.5 N for the Milagro£¿ screw and 529.0¡À63.3 N for magnesium-based screw (ns, P=0.57). Elongations after preload, during cyclical loading and during failure load were not different between the groups (ns, P>0.05). Stiffness was 121.1¡À13.8 N/mm for the magnesiumbased screw and 144.1¡À18.4 for the Milagro£¿ screw (ns, P=0.32). MgYREZr alloy interference screws show comparable results in biomechanical testing to standard implants and may be an alternative for anterior cruciate reconstruction in the future.
%U https://www.pagepress.org/journals/index.php/or/article/view/6445