Note: This keyword appears to target a niche intersection of 3D visualization (Blender software) and medical/dental asset creation. The article assumes the user wants to generate high-resolution ("extra quality") 3D models of teeth with cracks for rendering, animation, or 3D printing.
If your focus is on the "extra quality" of the 3D models themselves (for printing or surgical guides), these papers are the industry references: blender for dental crack extra quality