Flexible Filament or Resin Safe for Use in Mouth

[curious aardvark]

there is an italian company who make human friendly flexible filament.
http://www.mymatsolutions.com/

As far as I know those are the only certified flexibles around.
Either the Foodie or C4-U would be suitable - not sure what the difference is.
Both can also be boiled, sterilised in an autoclave etc.

The dental stuff made on resin machines is not usually destined directly for people's mouths. More often they are moulds, jigs or reproductions for fitting braces etc.

If anyone does end use flexible filament it will be Envisiontec: https://envisiontec.com/3d-printing-materials/
Looking thorugh their - end use section I can't find anything that's food grade.