فهرست نشریات علمی دسترسی آزاد ایران

Objective(s): Despite a global increase in dental implant procedures -now exceeding one million annually-there remains significant potential for advancement in implant materials. In order to create a better substitute for the materials used in dental implants today, this study examines how reinforcement with silicon dioxide (SiO₂) nanoparticles can improve the mechanical and physical properties of polyetherketoneketone (PEKK).Methods: Biomedical composites were prepared by incorporating SiO₂ nanoparticles into a PEKK matrix at weight percentages of 0%, 2%, 3%, and 4% (n=5 per group). The nanoparticle and polymer powders were homogenized in ethanol, dried at 120°C, and compression-molded at 310°C under 15 MPa for 20 minutes. The resulting specimens were evaluated for their mechanical (flexural strength), physical (surface roughness, wettability), and morphological (SEM, AFM) properties.Results: The incorporation of SiO₂ nanoparticles, particularly at 3 wt%, led to significant improvements in both mechanical and physical characteristics of the PEKK composite. The 3% SiO₂/PEKK group demonstrated the maximum flexural strength and improved surface hydrophilicity and roughness, which was verified with the help of SEM and AFM analysis.Conclusions: The results indicate that PEKK/3%SiO₂ nanocomposites possess enhanced biomechanical and biological behavior over the neat PEKK. The PEKK/3%SiO₂ nanocomposites hold the potential to be used as biocompatible substitutes of titanium in the field of dental implants.