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Development of Three-Dimensional (3D) Biodegradable Polyglycolic Acid Fiber (PGA) Preforms for Scaffold Applications:
Hikmet Kundak1, Kadir Bilisik1,2
1Nano/Micro Fiber Preform Design and Composite Laboratory, Department of Textile Engineering, Faculty of Engineering, Erciyes University, Talas 38039, Kayseri, Turkey.
Polymers
|May 13, 2023
Summary
Three-dimensional biodegradable polyglycolic acid fiber preforms offer a temporary scaffold for tissue regeneration. These structures exhibit anisotropic properties and support cell growth through their thickness, aiding in tissue repair.
Area of Science:
- Biomaterials Engineering
- Tissue Engineering
- Materials Science
Background:
- Three-dimensional (3D) biodegradable polyglycolic acid (PGA) fiber preforms are crucial for tissue regeneration.
- Developing scaffolds with predictable mechanical properties is essential for successful tissue engineering.
Purpose of the Study:
- To design and analyze 3D biodegradable PGA fiber preforms for tissue regeneration.
- To predict the stiffness and strength properties of these scaffolds using analytical relations and finite element modeling.
Main Methods:
- Fabrication of 3D PGA fiber preforms with varying interlaced structures (plain, semi-interlaced, orthogonal woven).
- Application of analytical relations and TexGen software (finite element model-based) to predict fiber and porosity fractions.
- Analysis of scaffold anisotropy, yarn geometry changes, and through-the-thickness properties.
Main Results:
- 3D PGA fiber preforms exhibited heterogeneous and anisotropic mechanical properties (yarn-to-yarn space, density, angles).
- Predicted scaffold properties showed deviations from measured values due to non-ideal yarn cross-sections (lenticular shape) under pressure.
- Z-yarn (through-the-thickness) modulus and strength were critical due to their significant contribution.
Conclusions:
- 3D PGA fiber preforms serve as effective temporary supportive substrates for 3D tissue regeneration.
- Cellular growth through the z-yarn is facilitated, enabling various mechanobiology mechanisms for tissue repair.
