Comparison of pre- and post-implantation mechanical behavior of composite hernia meshes
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Medical University-Sofia, Faculty of Pharmacy, Sofia, Bulgaria
Bulgarian Academy of Sciences, Institute of Mechanics, Sofia, Bulgaria
Hospital “Saint Sofia”, Sofia, Bulgaria
Submission date: 2019-10-14
Final revision date: 2019-12-06
Acceptance date: 2019-12-20
Online publication date: 2020-07-15
Publication date: 2020-07-15
Corresponding author
Miglena Kirilova-Doneva   

Faculty of Pharmacy, Medical University of Sofia, Dunav 2 Str, 1000, Sofia, Bulgaria
Journal of Theoretical and Applied Mechanics 2020;58(3):769-778
Implantation of synthetic meshes provokes complications which require long-lasting follow-up. The mesh materials exposed to physiological conditions demonstrate differences in failure load, stiffness and extension. Mechanical alterations of explants made of polyester were investigated using a uni-axial tensile test and a relaxation test. The tensile strength of the explanted meshes changed in the transversal direction. The elastic modulus in the same direction increased two times. A magnified mesh image displayed mesh alteration. The relaxation tests revealed that the initial stress decreases after implantation while the reduction of stress increases in the interval 50%-96.6%.
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