A Chilean startup Copper3D had recently unveiled PLACTIVE, an antibacterial 3D printing filament designed for the production of medical devices such as prosthetics and braces. Taking interest in PLACTIVE, the NASA Nebraska Space Grant is working with the University of Nebraska Omaha and Copper3D on a study of PLACTIVE and states the new material has already passed very exhaustive laboratory tests with +99.99% elimination of most dangerous bacterial strains.

Source: https://www.fabbaloo.com/blog/2018/9/11/nasa-testing-antibacterial-3d-print-materials-but-should-you