Shape Memory Polymers for Biomedical Applications by L Yahia

By L Yahia

Form reminiscence polymers (SMPs) are an rising classification of clever polymers which offer scientists the power to procedure the fabric right into a everlasting nation and predefine a moment transitority country which might be caused by means of assorted stimuli. The altering chemistries of SMPs permits scientists to tailor vital homes resembling power, stiffness, elasticity and enlargement expense. hence SMPs are being more and more used and constructed for minimally invasive purposes the place the fabric can extend and strengthen submit insertion. This ebook will offer readers with a finished overview of form reminiscence polymer applied sciences. half 1 will speak about the basics and mechanical facets of SMPs. Chapters partially 2 will examine the diversity of applied sciences and fabrics to be had for medical manipulation while the ultimate set of chapters will evaluate applications.

  • Reviews the basics of form reminiscence polymers with chapters focussing at the simple ideas of the materials
  • Comprehensive assurance of layout and mechanical features of SMPs
  • Expert research of the variety of applied sciences and fabrics on hand for clinical manipulation

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As the anchor is loaded over time and during rehab, the loading itself provides the additional mechanical impetus required to further deploy the shape-memory implant. This PEEK-based polymer system utilizes a mechanical recovery for shape change and has a Young’s modulus approaching 3 GPa at body temperature. The material has proven to be exceptionally durable, with storage stability for periods of up to 4 years. As a result of the success of the mechanically activated SMP in vivo, MedShape has launched additional orthopedic devices utilizing its unique properties, including the ExoShape® Soft Tissue Fastener.

Polymer composites in which the discontinuous phase or additive takes the form of 44 Shape Memory Polymers for Biomedical Applications fibers), require the use of biaxial systems. There are three main types of biaxial tensile testing: (1) planar biaxial tests, in which two forces of independent origin are introduced along two primary axes; (2) bursting tests, in which a disc-shaped specimen is clamped along its edge and inflated by a gas or fluid until it bursts; and (3) cylinder tests, which require a hollow, cylindrical sample that is subjected to internal pressure and axial tension.

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