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Biomechanical investigation of a novel hybrid dorsal double plating for distal radius fractures by integrating topology optimization and finite element analysis

Injury Mar 13, 2020

Liu MDHC, et al. - In the present study, the researchers sought to produce a novel hybrid dorsal double plating, which improves biomechanical strength in the articular fixation region and achieve the minimally invasive surgical technique requirement of distal radius fracture treatment by combining weighted topology optimization and finite element (FE) analysis. A dorsal template bone plate design [based on dorsal double plating (DDP)] was designed to perform weighted topology optimization and FE analysis under six fracture models with 50%, 30%, and 20% weighting of the joint subjected to axial, bending, and torsion moments, respectively. Outcomes of weighted topology optimization demonstrated that the profile of the hybrid dorsal double plating (HDDP) presented a “Y” shape. Simulation results exhibited that the bone plate stress values for the distal radius fractures fixed with HDDP was much smaller compared with those with DDP despite the type of bone fractures and load conditions. According to findings, the novel HDDP showed better resistance to functional loads, provided sufficient screw fixation at the articular surface, and can be placed on the dorsal site of the distal radius through the standard dorsal approach to lessen invasive surgeries and remove tendon irritations.
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