the cause of heat / cold sensitivity is typically due to exposed dentin tubules, the cause depending on age / diet but in general low pH in the mouth can be corrosive to teeth, particularly due to phosphoric acid present in sodas. When I had pain, I remembered that IP6 dissolves at low pH, so I would put some powdered IP6 in my mouth on the pain spots. The acidity present in the local areas dissolves it, and I theorize calcium, mag, phos are deposited on the exposed tubules and closes them up, since my pain always went away when doing this.
Considering that IP6 occurs naturally in many foods that most people no longer eat, and that the IP6 is typically removed during food processing, coupled with Dr. Price's observation of the teeth's ability to repair themselves in persons on native diets, suggests to me the IP6 is a natural toot restorative. At least my observations in my self are consistent with this theory.