Ionic transport through bis-glycidyl methacrylate films.

Area of Science:

• Dental Materials Science
• Biomaterials
• Cariology

Background:

• Bis-GMA fissure sealants are used to prevent dental caries.
• Understanding ion transport through sealants is crucial for evaluating their effectiveness.
• Previous studies suggest potential interactions between sealants and tooth structure.

Purpose of the Study:

• To investigate the ionic transport selectivity of bis-GMA fissure sealant films.
• To determine if topical fluoridation is still possible after sealant placement.
• To elucidate the mechanism behind observed ionic transport phenomena.

Main Methods:

• Specific ion meter studies were conducted to measure ionic transport.
• Fluoride, calcium, and chloride ion concentrations in solution around tooth sections were monitored.
• Calcium exchange studies were performed to assess enamel interactions.
• Microsolubility tests were used on sealed teeth in calcium chloride solutions.

Main Results:

• Ionic transport through bis-GMA fissure sealant films was found to be selective.
• Dissolved fluoride ions disappeared from the solution around tooth sections faster than calcium and chloride ions.
• Calcium was removed from the enamel during the process.
• The microsolubility of fissure-sealed teeth in CaCl2 solution increased post-procedure.

Conclusions:

• Topical fluoridation of pits and fissures can be achieved even after the placement of a fissure sealant.
• The sealant facilitates selective fluoride ion transport, potentially enhancing enamel protection.
• The preparative and sealing procedures may lead to calcium removal from enamel and increased microsolubility.