Naveen NB, Deckard ER, Buller LT, et al. - This study was attempted to compare the mechanical properties of two mesh material types that can be used for extensor mechanism (EM) reconstruction. Researchers compared mechanical properties of a polypropylene mesh (Marlex Mesh; CR Bard, Franklin Lakes, NJ) and LARS mesh (Corin; United Kingdom) applying force-displacement data from a material testing machine simulating knee movement during normal human gait. They further assessed and estimated tension to failure/ultimate tensile load, stiffness coefficients, axial strain, and cyclic hysteresis testing. LARS mesh exhibited superior performance related to force-displacement testing in comparison with polypropylene mesh. The improved mechanical performance of LARS mesh may associate clinically to fewer failures, elevated longevity and higher resistance to plastic deformation (extensor lag). Further study is needed to evaluate survivorship and clinical outcomes of these meshes when applied for EM reconstruction.