Development and Characterization of Nanofiller-Reinforced PLA Composites for Biodegradable Bone Fracture Fixation Devices

The efficacy of polylactic acid (PLA) and its nanocomposites for bone fracture fixation was investigated through a comprehensive series of analyses including tensile testing, Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FT-IR). Tensile tests revealed that PLA nanocomposites exhibited superior ductility and flexibility compared to pure PLA, which is critical in orthopedic applications to withstand dynamic loads. DSC measurements indicated a slight enhancement in the glass transition temperature for nanocomposites, suggesting improved thermal properties that could be beneficial for maintaining structural integrity post-implantation. TGA results demonstrated the enhanced thermal stability of nanocomposites, an advantage for enduring the thermal stresses of inflammation and sterilization. SEM analysis provided insights into the microstructural uniformity of the nanocomposites, indicating a well-distributed filler within the polymer matrix, essential for consistent mechanical performance. FT-IR analysis confirmed the presence of chemical interactions between the polymer matrix and the nanofillers, hinting at the possibility of enhanced material properties. Collectively, these findings suggest that PLA nanocomposites possess a more favorable combination of mechanical resilience, thermal stability, and potential for improved biological integration, positioning them as promising candidates for the development of bone fracture fixation devices. However, further in vivo studies are warranted to evaluate the long-term biocompatibility and osteoconductivity of these materials within the physiological environment.