What are the purposes of using occlusal splints?
1. To change the pattern and degree of tactile afferent neural impulses.
2. To immobilize teeth.
3. To produce a permanent change in the occlusion.
4. To prevent teeth from disturbing occlusal sensory input.

(1) (2) (4)

(1) and (2)

(3) only

All of the above.