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Exploring Advanced Functionalities of Carbon Fiber-Graded PEEK Composites as Bone Fixation Plates Using Finite

Chenggong Zhang1, Pihua Wen2, Yigeng Xu3

  • 1School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK.

Materials (Basel, Switzerland)
|January 23, 2024
PubMed
Summary

New carbon fiber-reinforced PEEK bone plates significantly reduce stress shielding compared to metal implants. These advanced materials offer better mechanical adaptability for fracture healing and improved patient outcomes.

Keywords:
CCF/PEEKfinite element analysisfixation platefunctionally graded materialsstress shielding

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Area of Science:

  • Biomaterials Engineering
  • Orthopedic Biomechanics
  • Materials Science

Background:

  • Conventional metallic bone fixation plates (e.g., stainless steel, titanium alloys) present challenges like stress shielding, allergic reactions, and imaging interference.
  • Low elastic modulus materials are promising for overcoming the limitations of metallic implants in biomechanical applications.

Purpose of the Study:

  • To investigate the effectiveness of chopped carbon fiber-reinforced polyether ether ketone (CCF/PEEK) functionally graded material (FGM) bone plates in mitigating stress shielding.
  • To compare the stress shielding effects of FGM bone plates with traditional metal plates under static and dynamic loading conditions.

Main Methods:

  • Finite element analysis (FEA) was employed to model and analyze CCF/PEEK FGM bone plates using ABAQUS software.
  • User subroutines USDFLD and VUSDFLD were utilized to establish FGM bone plate models with varying elastic modulus distributions.
  • Models were designed with equivalent overall elastic modulus but distinct material property gradients.

Main Results:

  • All CCF/PEEK FGM bone plates demonstrated reduced stress shielding effects compared to metallic bone plates.
  • An FGM plate with an elastic modulus increasing from the center to the edges provided the most significant stress stimulation.
  • This specific FGM design also resulted in the most uniform stress distribution across the fractured area.

Conclusions:

  • CCF/PEEK FGM bone plates offer a superior alternative to conventional metal plates for bone fixation, effectively reducing stress shielding.
  • The design of FGM bone plates with tailored elastic modulus gradients is crucial for optimizing mechanical adaptability and promoting fracture healing.
  • These findings provide valuable insights for the development of next-generation implantable medical devices with enhanced biomechanical performance.