Fluoride is the most effective substance available to aid in the prevention of tooth decay. It's a mineral naturally present in varying concentrations in almost all foods and water supplies.The advantages of fluoride have been well-documented for over 50 years and are endorsed by many health and professional organizations.
Fluoride's protective action occurs in two ways:

Surface Fluoride (Topical): This strengthens erupted teeth by integrating into the outer layer of enamel, making them more resistant to decay.We get surface fluoride from using fluoride-containing dental products such as toothpaste, mouthwashes, and gels.Dentists and dental hygienists often advise professional fluoride applications for children twice a year during their routine dental visits.
Internal Fluoride (Systemic): This strengthens both erupted teeth and those still forming under the gums. We obtain internal fluoride from most foods and our community water sources. It's also available as a supplement in liquid or gel form, which can be prescribed by your child's dentist or physician. Typically, fluoride drops are recommended for infants, and tablets are better suited for children through adolescence. It's essential to control the amount of fluoride a child ingests. Excessive fluoride intake during tooth development can result in fluorosis (white spots on the teeth).

Although most individuals receive some fluoride through food and water, it's sometimes not sufficient to prevent decay effectively. Your child's dentist or dental hygienist may recommend the use of at-home and/or in-office fluoride treatments for the following reasons:

Pronounced grooves and fissures on the biting surfaces of teeth.
Exposed and sensitive tooth root surfaces.
Less than ideal oral hygiene habits.
Frequent intake of sugary and starchy foods.
Limited exposure to fluorides.
Reduced saliva production due to medical conditions, treatments, or medications.
A recent history of cavities.

Remember that fluoride alone cannot prevent tooth decay! It's crucial to brush at least twice a day, regularly floss, consume balanced meals, reduce sugary snacks, and visit your dentist regularly.