A rotating disc study of enamel dissolution in HEDP solution under simulated white spot conditions

A rotating disc method has been used to study simulated white spot formation at a bovine enamel surface in the presence of 1-hydroxy-1-ethane-1, 1-diphosphonic acid (HEDP) at PH = 5.0. The reaction appears to be accompanied by the slow precipitation of a CaHEDP phase within the pores of the "intact" layer.