Final answer:
When fluoride intake is low, tooth decay is more frequent. Fluoride helps to rebuild and strengthen the tooth's surface, preventing cavities from forming and even rebuilding the tooth's surface. Water fluoridation is a cost-effective method of delivering fluoride, reducing tooth decay by 25% in children and adults.
Step-by-step explanation:
True.
When fluoride intake is low, tooth decay is more frequent. Fluoride helps to rebuild and strengthen the tooth's surface, preventing cavities from forming and even rebuilding the tooth's surface. Water fluoridation is a cost-effective method of delivering fluoride, reducing tooth decay by 25% in children and adults. Therefore, it is important to ensure an adequate intake of fluoride to protect against tooth decay.