Biomechanical comparison of biodegradable magnesium screws and titanium screws for operative stabilization of displaced capitellar fractures
Journal of Shoulder and Elbow Surgery May 18, 2020
Wagner FC, Post A, Yilmaz T, et al. - This study was sought to compare headless compression screws made from titanium with a biodegradable equivalent made from a magnesium alloy. Researchers performed a biomechanical in vitro study on 13 pairs of fresh-frozen human cadaveric humeri, in which a standardized Bryan-Morrey type I fracture was fixed applying 2 magnesium screws or 2 titanium screws. They assessed construct stiffness during 10 cycles of static loading between 10 and 50 N. They applied continuous loading at 4 Hz between 10 and 50 N, elevating the maximum load every 10,000 cycles by 25 N until construct failure occurred. This study's findings demonstrated that biomechanical comparison exhibited that simple capitellar fractures are equally stabilized by headless compression screws made from titanium or a biodegradable magnesium alloy. Thus, their clinical application should be considered and analyzed, in view of the advantages of biodegradable implants for transcartilaginous fracture stabilization
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