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Related Experiment Videos

PLGA bone plates reinforced with crosslinked PPF.

V Hasirci1, A E Litman, D J Trantolo

  • 1Middle East Technical University, Department of Biological Sciences, Biotechnology Research Unit, Ankara 06531, Turkey. vhasirci@metu.edu.tr

Journal of Materials Science. Materials in Medicine
|September 7, 2004
PubMed
Summary
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New biodegradable poly(propylene fumarate) (PPF) composites reinforced poly(lactide-co-glycolide) (PLGA) bone plates, using NVP-EGDMA/PPF, show improved mechanical properties and reduced degradation, offering a promising alternative for orthopedic implants.

Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Orthopedic Engineering

Background:

  • Poly(lactide-co-glycolide) (PLGA) is a common biodegradable polymer for bone implants.
  • PLGA bone plates can suffer from warping and catastrophic failure.
  • Reinforcement is needed to improve the mechanical integrity and dimensional stability of PLGA bone plates.

Purpose of the Study:

  • To investigate the use of crosslinked poly(propylene fumarate) (PPF) as a reinforcing agent for PLGA bone plates.
  • To evaluate the effect of different crosslinkers (NVP, HEMA, NVP-EGDMA) on the properties of PPF-reinforced PLGA.
  • To assess the suitability of these composite materials for biodegradable orthopedic implants.

Main Methods:

  • Poly(propylene fumarate) (PPF) was crosslinked with N-vinylpyrrolidone (NVP), 2-hydroxyethylmethacrylate (HEMA), or NVP and ethyleneglycol dimethacrylate (EGDMA).

Related Experiment Videos

  • The crosslinked PPF was used to reinforce poly(lactide-co-glycolide) (PLGA) bone plates.
  • Mechanical properties (flexural modulus, compressive strength) and degradation behavior (PLGA extraction, surface roughness via AFM) were analyzed.

    • Main Results:

    • Crosslinking with HEMA resulted in higher retention (92%) compared to NVP (almost complete leaching) in phosphate-buffered saline.
    • NVP-EGDMA/PPF reinforced plates showed significantly less PLGA extraction (59.52%) than NVP/PPF (75.42%) and HEMA/PPF (30.86%) after 72h extraction.
    • PPF-reinforced plates exhibited higher flexural modulus and compressive strength than unreinforced PLGA.
    • NVP-EGDMA/PPF reinforced plates demonstrated a distinct crystalline organization and higher surface roughness (43.525 nm) compared to NVP/PPF plates (19.319 nm).

    Conclusions:

    • NVP-EGDMA/PPF reinforced PLGA shows potential as a biodegradable orthopedic implant material.
    • This composite material offers improved mechanical strength and dimensional stability, reducing the risk of warping and failure.
    • The tunable degradation profile and enhanced mechanical properties make NVP-EGDMA/PPF/PLGA a promising candidate for advanced orthopedic applications.