Which OTC mouthrinse has been recognized by the ADA and approved by the FDA for the control and treatment of plaque biofilm and gingivitis?

The correct answer is the mouthrinse that contains essential oils. This type of mouthrinse has been recognized by the American Dental Association (ADA) for its effectiveness in controlling plaque biofilm and managing gingivitis. The formulation typically includes agents like thymol, eucalyptol, and menthol, which work synergistically to reduce bacteria that contribute to gingival inflammation and plaque accumulation.

Incorporating essential oils into a mouthrinse has been shown to significantly decrease plaque and gingivitis when combined with regular brushing and flossing. This recognition by the ADA highlights the clinical research and evidence supporting its use in an everyday oral hygiene regimen.

While hydrogen peroxide is used for its antiseptic properties and can aid in reducing oral bacteria, it is not specifically recognized for the control of plaque biofilm and gingivitis in the same manner as essential oils. Alcohol-based mouthwashes can offer a temporary antibacterial effect but may not have the same broad efficacy for plaque control and are not universally recommended, as they can lead to oral dryness. Chlorhexidine is a prescription mouthrinse, effective for plaque control and gingivitis, but is not available over-the-counter and therefore does not fit the criteria stated in the question regarding OTC products.