Quantitative study of enamel dissolution under conditions of controlled hydrodynamics.

A rotating disk method has been used to study the dissolution of bovine enamel. A diffusion model adequately describes the reaction for a wide range of conditions, and the rate is also hydrogen ion dependent. The solubility product of bovine enamel, 5.9 +/- 1.8 X 10(-59) moles9 1(-9) at 25 C is derived by a method that minimizes the possibility of phase changes.