Question

Numerous clinical trials reported the reduction of approximately __% in caries incidence with fluoride dentifrice containing 1000 to 2800 ppm fluoride.

A. 20%
B. 40%
C. 60%
D. 80%

Answer 1

Clinical trials suggest a reduction of caries incidence by approximately 24% to 40% with fluoride dentifrice containing 1000 to 2800 ppm fluoride, with option B (40%) being the most accurate choice given.

Step-by-step explanation:

Numerous clinical trials have reported a reduction in caries incidence by approximately 24% to 40% with fluoride dentifrice containing 1000 to 2800 ppm fluoride. To be specific, a review suggests that toothpaste with at least 1000 ppm fluoride can help prevent tooth decay; therefore, option B, 40%, is likely the closest answer within the provided choices. It's important to note that the effectiveness of fluoride in reducing tooth decay is dependent on the concentration, with higher concentrations generally being more effective, up to a certain point where it can cause harm.