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Related Experiment Videos

Biodegradation of a polyurethane in vitro.

S K Phua, E Castillo, J M Anderson

    Journal of Biomedical Materials Research
    |February 1, 1987
    PubMed
    Summary

    This study investigated how enzymes affect Biomer, a polyurethane in medical devices. Papain degraded Biomer more than urease, impacting its performance properties.

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    Area of Science:

    • Biomaterials Science
    • Polymer Chemistry
    • Biotechnology

    Background:

    • Biomer, a segmented polyetherurethane, is widely used in blood-contacting medical devices.
    • Understanding polymer degradation is crucial for device longevity and patient safety.

    Purpose of the Study:

    • To evaluate the in vitro enzymatic degradation of Biomer.
    • To assess the impact of proteolytic enzymes on Biomer's performance properties.

    Main Methods:

    • Ultrathin Biomer samples were exposed to papain and urease at 37°C for 1-6 months.
    • Degradation was analyzed using fatigue tests, gel permeation chromatography (GPC), and ATR-FTIR.
    • Chemical and physical analyses were performed on treated samples.

    Main Results:

    • Papain demonstrated greater degradation efficacy compared to urease.
    • Enzymatic exposure altered the performance properties of Biomer.
    • Specific mechanisms of enzymic degradation were proposed based on the observed effects.

    Conclusions:

    • Enzymatic degradation significantly affects the performance of Biomer.
    • Papain is a more potent enzyme for Biomer degradation than urease.
    • Further research into degradation mechanisms can inform the design of more resilient biomaterials.

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