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Comprehensive Modeling of the Viscoelastic Relaxation Behavior of Polypropylene Tension Free Urinary Incontinence Tapes

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Abstract:

Polypropylene free tension slings are used for for the treatment of female stress urinary incontinence. The purpose of this work was to study the viscoelastic stress relaxation response of a type of tension free mesh, before and after the immersion in Ringer's solution and to model the stress relaxation response with analytical viscoelastic models. The viscoelastic models of general linear solid proposed by Zener and the four parameter model of Burger were applied in order to simulate the stress relaxation curves and calculate the parameters. It was found that incubation for 20 days in Ringer's solution has a plastification/softening effect on the polypropylene mesh. Both viscoelastic models performed quite well in simulating the experimental relaxation stress-time curves, with Burger's model delivering an almost 99% accuracy. Both model delivered parameters of a physical significance. The application of viscoelastic modeling on the stress relaxation behavior of tension free urinary slings made from polypropylene has shown that the methodology proposed is quite accurate in predicting the long term response in such materials.

Keywords: BURGER'S MODEL; FEMALE INCONTINENCE; POLYPROPYLENE; TENSION-FREE VAGINAL TAPE; VISCOELASTIC RELAXATION; ZENER'S MODEL

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/asem.2011.1111

Publication date: December 1, 2011

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  • Advanced Science, Engineering and Medicine (ASEM) is a science, engineering, technical and medical journal focused on the publishing of peer-reviewed multi-disciplinary research articles dealing with all fundamental and applied research aspects in the areas of (1) Physical Sciences, (2) Engineering, (3) Biological Sciences/Health Sciences, (4) Medicine, (5) Computer and Information Sciences, (6) Mathematical Sciences, (7) Agriculture Science and Engineering, (8) Geosciences, and (9) Energy/Fuels/Environmental/Green Science and Engineering.
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