Which provides moderate-dose (1000 mg/L) fluoride topically on a 2-3 times per day basis and requires active use, but ingestion is a concern for younger children?

• A. Fluoride toothpaste
• B. Fluoride mouthrinse
• C. Fluoridated water
• D. Fluoride varnish

Answer: (A)

Active brushing with a fluoride toothpaste delivers a moderate topical fluoride dose directly to the teeth. Most commercially available toothpaste contains about 1000 ppm F, which is equivalent to 1000 mg of fluoride per liter of product. When you brush twice or three times daily, you create repeated, short exposures of fluoride to the enamel, helping to remineralize early lesions and inhibit demineralization.

The need for active use is key here: unlike water fluoridation or varnish, the fluoride has to be applied by the person brushing, so the topical contact is intentional and frequent. However, ingestion is a concern for younger children because they may swallow toothpaste during brushing, which is why supervision is important and why a pea-sized amount is recommended for kids.

Other options don’t fit this exact scenario as neatly. Fluoride varnish is much higher in concentration and applied in a clinical setting rather than used daily at home. Fluoridated water provides fluoride mainly through ingestion and does not require active application. Fluoride mouthrinses are used by rinsing and spitting, and while they can contribute to topical fluoride, their typical concentrations and usage patterns aren’t the same as the steady, home-based, moderate-dose brushing routine described here.