Skull model in 4 parts- 
Cranium with upper teeth, mandible with lower teeth. 
2 materials- bone and teeth.

Modelled to average human male scale in metric units, approx 22cm total height with jaw closed. Jaw can be articulated (and animated) by rotating the mandible object on the x-axis.

Files supplied for Blender versions 2.79 and 3.1+. Newer file includes a simple Cycles scene with lighting and shadow catcher. 

Built using subdivision surfaces and mirror modifier. All 4 objects have UVs which fit without overlap within the same texture area.