Blender is more and more becoming a platform for 3rd party applications. Take a look for example at 'Open Dental CAD' - a tool for crown and onlay design.
Open Dental CAD writes:
The Dental Design Tools Add-On is a collection of scripts which takes advantage of currently existing tools within Blender as well as adding some novel functions of it’s own. At the moment, it is capable of designing individual crowns and onlays based on digital models in .STL, .OBJ or .PLY formats.