Apparent Heats of Wetting and Heats of Reaction of the Components of Tooth Structure and Synthetic Fluorapatite

Abstract
The apparent heats of wetting (ΔHW) and heats of reaction (ΔHR) of ground dentin, enamel, anorganic tooth, and synthetic fluorapatite of known specific surface were determined calorimetrically. Values of ΔHW in water were affected by the presence of collagenous matter. Reactions at the surface were caused mainly by organic groups, since the ΔHR values for anorganic tooth, enamel, and fluorapatite were much smaller when exposed to reagents.