<p>This study investigates the impact of graphitic carbon nitride (g-C₃N₄) filler on the mechanical and antibacterial characteristics of dental composites. The experimental dental composite was developed by incorporating g-C₃N₄ into a commercially available dental composite at different ratios (0.1, 0.5, and 1%). The resulting composites were then characterized using Fourier transform infrared radiation (FTIR), x-ray diffraction (XRD), and scanning electron microscope (SEM) to assess their characteristics, and their mechanical properties (Vickers hardness, biaxial flexural strength, and compressive strength) were examined. The antimicrobial tests were performed on Streptococcus mutans (<i>S. mutants)</i>. The g-C₃N₄ powder was synthesized by subjecting melamine powder to pyrolysis, followed by characterization using analytical techniques to verify the synthesis. FTIR and x-ray radiation (XRD) techniques were used to detect and determine the specific peaks associated with g-C₃N₄. The scanning electron microscope (SEM), transmission electron microscope (TEM), and high-resolution transmission electron microscope (HRTEM) revealed particles ranging in size from 0.1 to 1.9&#xa0;μm, with a layered and amorphous structure of g-C₃N₄. The group treated with 0.1% g-C₃N₄ had a considerably greater Vickers hardness value of 52.67 ± 1.72 compared to both the control group and other experimental groups. The biaxial flexural strength in the experimental groups was significantly high at 67.6 ± 0.9 for 0.1%, although it was reduced compared to the control group (72.0). The compressive strength exhibited a value of 87.3 ± 3.0, which demonstrated a reduction with an increase in the quantity of g-C₃N₄. While g-C₃N₄ showed antibacterial properties, its dental composite exhibited no&#xa0;similar activity. The addition of g-C₃N₄ in dental composite improved some properties, while others reduced which are still in the permissible range for dental applications.</p>