Ionic transport through bis-glycidyl methacrylate films.

Specific ion meter studies have shown that ionic transport through bis-GMA fissure sealant films is selective and that dissolved fluoride ions disappear from the solution around tooth sections at a more rapid rate than do calcium and chloride ions. This would indicate that topical fluoridation of pits and fissures can still be effected after placement of a fissure sealant. A causative mechanism for this phenomenon has been postulated. Calcium exchange studies indicate that calcium is removed from the enamel and that the microsolubility of fissure sealed teeth in CaCl2 solution is increased by the preparative and sealing procedure used for the enamel.