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Related Experiment Videos

Poly(D,L-lactide/epsilon-caprolactone)/hydroxyapatite composites.

E Ural1, K Kesenci, L Fambri

  • 1Department of Chemical Engineering, Hacettepe University, TUBITAK-Center of Excellence: POLBITEK, Beytepe, Ankara, Turkey.

Biomaterials
|September 14, 2000
PubMed
Summary
This summary is machine-generated.

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This study synthesized elastomeric copolymers for bone filling. Hydroxyapatite addition improved mechanical properties and reduced degradation rates, showing promise for bone regeneration applications.

Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Orthopedic Materials

Background:

  • Elastomeric copolymers are explored for bone-filling applications.
  • Controlling copolymer properties is crucial for effective bone regeneration.
  • Hydroxyapatite incorporation can enhance biomaterial performance.

Purpose of the Study:

  • To synthesize and characterize elastomeric D,L-lactide and epsilon-caprolactone copolymers.
  • To investigate the effect of hydroxyapatite (HA) loading on composite properties.
  • To evaluate the degradation behavior of these potential bone-filling materials.

Main Methods:

  • Ring-opening polymerization using stannous octoate catalyst.
  • Synthesis of copolymers with two different molecular weights.

Related Experiment Videos

  • Characterization using 1NMR, differential scanning calorimetry (DSC).
  • Mechanical testing (Young's modulus, yield stress, elongation).
  • In vitro degradation studies in Ringer solution.

    • Main Results:

    • Copolymers (60/40 D,L-lactide/epsilon-caprolactone) were amorphous with Tg around -21°C.
    • Hydroxyapatite incorporation increased Young's modulus and yield stress, while decreasing elongation.
    • Composites were hand-shapable and degraded in Ringer solution within 6 weeks.
    • Hydroxyapatite reduced the degradation rate of the copolymers.

    Conclusions:

    • Synthesized elastomeric copolymers show potential as bone-filling materials.
    • Hydroxyapatite loading significantly enhances mechanical properties and modulates degradation.
    • These tailored composites offer promising characteristics for orthopedic applications.