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- W2034678719 abstract "Short-segment instrumentation for spine fractures is threatened by relatively high failure rates. Failure of the spinal pedicle screws including breakage and loosening may jeopardize the fixation integrity and lead to treatment failure. Two important design objectives, bending strength and pullout strength, may conflict with each other and warrant a multiobjective optimization study. In the present study using the three-dimensional finite element (FE) analytical results based on an L 25 orthogonal array, bending and pullout objective functions were developed by an artificial neural network (ANN) algorithm, and the trade-off solutions known as Pareto optima were explored by a genetic algorithm (GA). The results showed that the knee solutions of the Pareto fronts with both high bending and pullout strength ranged from 92% to 94% of their maxima, respectively. In mechanical validation, the results of mathematical analyses were closely related to those of experimental tests with a correlation coefficient of −0.91 for bending and 0.93 for pullout (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mi>P</mml:mi><mml:mo><</mml:mo><mml:mn>0.01</mml:mn></mml:math>for both). The optimal design had significantly higher fatigue life (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mi>P</mml:mi><mml:mo><</mml:mo><mml:mn>0.01</mml:mn></mml:math>) and comparable pullout strength as compared with commercial screws. Multiobjective optimization study of spinal pedicle screws using the hybrid of ANN and GA could achieve an ideal with high bending and pullout performances simultaneously." @default.
- W2034678719 created "2016-06-24" @default.
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- W2034678719 date "2013-01-01" @default.
- W2034678719 modified "2023-09-24" @default.
- W2034678719 title "Multiobjective Optimization Design of Spinal Pedicle Screws Using Neural Networks and Genetic Algorithm: Mathematical Models and Mechanical Validation" @default.
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- W2034678719 doi "https://doi.org/10.1155/2013/462875" @default.
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