Ion release and in vitro enamel fluoride uptake associated with pit and fissure sealants containing microencapsulated remineralizing agents.

Purpose: To determine if pit-and-fissure sealants with microencapsulated remineralizing agents with sustained release of fluoride, calcium and phosphate ions could promote enamel fluoride uptake by demineralized tooth structure.

Methods: Sealants that contained 5 w/w% microcapsules with aqueous solutions of 5M Ca(NO3)2 or 0.8M NaF or 6.

Ion release, fluoride charge of and adhesion of an orthodontic cement paste containing microcapsules.

Objectives: Dental materials capable of releasing calcium, phosphate and fluoride are of great interest for remineralization. Microencapsulated aqueous solutions of these ions in orthodontic cement demonstrate slow, sustained release by passive diffusion through a permeable membrane without the need for dissolution or etching of fillers. The potential to charge a dental material formulated with microencapsulated water with fluoride by toothbrushing with over the counter toothpaste and the effect of microcapsules on cement adhesion to enamel was determined.

The control of phosphate ion release from ion permeable microcapsules formulated into rosin varnish and resin glaze.

Objectives: The occurrence of recurrent caries at the interface of dental materials and the enamel surface is an important performance issue. The objective of this study was to investigate the most effective way to control the release rate of bioavailable phosphate ions contained in aqueous solutions within ion permeable microcapsules formulated into rosin based varnishes and resin based sealants, in order to promote remineralization.

Methods: Microcapsules that contained aqueous solutions of K2HPO4 with concentrations from 0.

Ion permeable microcapsules for the release of biologically available ions for remineralization.

The objective of this study was to investigate the effect of chemical structure, ion concentration, and ion type on the release rate of biologically available ions useful for remineralization from microcapsules with ion permeable membranes. A heterogeneous polymerization technique was utilized to prepare microcapsules containing either an aqueous solution of K₂HPO₄, Ca(NO₃)₂, or NaF. Six different polyurethane-based microcapsule shells were prepared and characterized based on ethylene glycol, butanediol, hexanediol, octanediol, triethylene glycol, and bisphenol A structural units.