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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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