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You ask about "filament", so I assume you expect fused-filament technologies. These are however not accurate enough, besides being prone to gaps and crevices which are problematic in crowns. The smallest viable nozzle, 0.2 mm, is still too rough for that. Dental 3D printers need to be very accurate, so the most common technologies used are ...


2

No PETG is a material that can only be used in FDM machines. This precludes any internal medical use, as FDM prints can't be made sterile or even hygienic - the sterilization processes would destroy the print, and FDM layers create many spots for germs to grow. Atop that, you can't get the needed precision with FDM - which means any FDM prints are at best ...


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