I have this dental format from some CT scanner, how to convert it to printable format or at least format that I can open as point cloud or something similar in 3D programs?

Yes, Invesalius. https://www.cti.gov.br/invesalius it inputs DICOM files and outputs obj and stl. It is an open-source software that works in Linux and even in unethical proprietary operating systems like Mac OS X and Windows.

There are a number of suites for doing this and the one that I’ve used is 3D slicer which is free and open source. They have a few great tutorials that go through the workflow of getting from DICOM to an STL or OBJ format.