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Polyetheretherketone (PEEK) is widely used in biomedical and dental
applications due to its good mechanical strength and biocompatibility; however, its
surface is relatively bioinert and lacks antibacterial properties. The aim of this work is to
fabricate Poly-ether-ether ketone (PEEK) based matrix composite with eggshell
powdered filler with 5 wt. %, 10 wt. %, and 15 wt. %. Further modified the surface
properties via coating chitosan to enhance the surface hardness, mechanical and
antibacterial properties. The incorporation of filler content and chitosan coating is
verified by structural characterization using XRF, FTIR, SEM, and EDX, confirming the
dispersion of filler in the PEEK matrix. Furthermore, the average contact angle
measurements confirm the improved surface wettability in coated composites. The
increasing trend in hardness and compression testing up to 10 wt.% filler concentration,
followed by a slight decrease at 15 wt.%, indicates the effect of higher loading and
agglomeration of particles on mechanical strength. Chitosan coating showed promising
improved antibacterial activity against E. coli and S. aureus in antibacterial testing, with a
visible increase in inhibition zone with increasing eggshell concentration. Overall, the
outcomes depicted that the composite based on polymeric PEEK matrix reinforce with
eggshell and chitosan coating can effectively enhance the surface properties, mechanical
performance, and antibacterial behavior of composites, making them viable replacement
of dental implant.