Oxford Performance Materials (OPM) Inc., a Connecticut based firm has stated that their 3D Printed Structures with PEKK (poly-ether-ketone-ketone) formulation have high anti-bacterial properties than the usual PEEK (poly-ether-ether-ketone). The study involved Mian Wang and Garima Bhardwaj with Northeastern University in Boston, who examined the 3D Printed PEKK produced using OsteoFab process, and therefore concluded PEKK was more efficient against infections in orthopedic applications.
Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5592909/