Hi everyone, I am new to 3D printing. Recently I want to 3D print a mandible model.
The teeth have small internal cavities that imitates the root canal system of teeth. I need to use X-ray to scan the internal cavity and the cavity should be preserved.
Snipaste_2021-04-21_13-42-40.jpg

20210421133552.jpg
But the internal cavity is very small (the diameter is about ~1mm)
I've consulted several 3D printing shops and they told me it's impossible to 3D print something with closed internal cavity and even if you left exit holes on the teeth surface, most 3D printers are not able to print such small cavities.
So I am wondering is it possible to 3D printing a model with small internal cavity (closed) ? Any help or information would be appreciated !