Which antibacterial mouthrinse is included in the remineralization protocol?

• A. Chlorhexidine Gluconate (.12%) rinse
• B. Listerine
• C. Povidone-iodine
• D. Hydrogen peroxide

Answer: (A)

Controlling bacterial load is central to remineralization because acid produced by plaque drives mineral loss and can undermine mineral gain. Chlorhexidine gluconate rinse is included for its strong, broad-spectrum antimicrobial effect with substantivity, meaning it adheres to oral tissues and provides prolonged bacterial suppression. This lowers the activity of cariogenic bacteria and reduces acid production, creating a more favorable environment for minerals to remineralize enamel when fluoride or other remineralizing agents are present. Other rinses lack this combination of targeted, long-lasting antibacterial action aligned with remineralization goals: Listerine has antiseptic effects but is not as specifically integrated into remineralization protocols; povidone-iodine is a general antiseptic used in broader infection control; hydrogen peroxide is more about short-term cleansing and whitening and can irritate tissues with longer use.