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An Overview of Mechanical Properties and Material Modeling of Polylactide (PLA) for Medical Applications
Veryst Engineering, LLCNeedhamUSA.
2016 (engelsk)Inngår i: Annals of Biomedical Engineering, ISSN 0090-6964, E-ISSN 1573-9686, Vol. 44, nr 2, s. 330-340Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This article provides an overview of the connection between the microstructural state and the mechanical response of various bioresorbable polylactide (PLA) devices for medical applications. PLLA is currently the most commonly used material for bioresorbable stents and sutures, and its use is increasing in many other medical applications. The non-linear mechanical response of PLLA, due in part to its low glass transition temperature (T g ≈ 60 °C), is highly sensitive to the molecular weight and molecular orientation field, the degree of crystallinity, and the physical aging time. These microstructural parameters can be tailored for specific applications using different resin formulations and processing conditions. The stress-strain, deformation, and degradation response of a bioresorbable medical device is also strongly dependent on the time history of applied loads and boundary conditions. All of these factors can be incorporated into a suitable constitutive model that captures the multiple physics that are involved in the device response. Currently developed constitutive models already provide powerful computations simulation tools, and more progress in this area is expected to occur in the coming years.

sted, utgiver, år, opplag, sider
2016. Vol. 44, nr 2, s. 330-340
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URN: urn:nbn:se:uu:diva-270808DOI: 10.1007/s10439-015-1455-8PubMedID: 26369638OAI: oai:DiVA.org:uu-270808DiVA, id: diva2:890573
Tilgjengelig fra: 2016-01-04 Laget: 2016-01-04 Sist oppdatert: 2017-12-01bibliografisk kontrollert

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