Import 3D scan

[Steffany]

I've made a 3D scan of my own head, saved it as .obj file and tried to import it into vizard but failed. Every time program freezes and crashes. I've read several topics about importing 3D models with different file formats but didn't understand which file format is preferred for me. I can save in .obj, .stl, or .wrl. Also my thoughts were about bad scan editing.
I downloaded Blender for editing and converting after into Collada but I'm not sure that it's a step into right direction. Any help would be greatly appreciated.

Steffany.

[Steffany]

Well, exporting fresh 3D scan from Artec Studio (https://www.artec3d.com/3d-software/artec-studio) to Blender and re-exporting to Vizard worked. In .obj file format. But .wrl formats didn't. Can't figure out what's the problem.