Fluoride is a mineral that occurs naturally in many foods and water. Every day, minerals are added to and lost from the tooth’s enamel layer through two processes: remineralization and demineralization. Minerals are lost (demineralization) from a tooth’s enamel layer when acids formed from plaque bacteria and sugars in the mouth attack the enamel. Minerals such as fluoride, calcium, and phosphate are redeposited (remineralization) to the enamel layer from the foods and waters consumed. Too much demineralization without enough remineralization to repair the enamel layer leads to tooth decay.
Fluoride helps prevent tooth decay by making the tooth more resistant to acid attacks from plaque bacteria and sugars in the mouth. It also reverses early decay. In children under 6 years of age, fluoride becomes incorporated into the development of permanent teeth, making it difficult for acids to demineralize the teeth. Fluoride also helps speed remineralization as well as disrupts acid production in already erupted teeth of both children and adults.
Fluoride is found in foods and in water. It can also be directly applied to the teeth through fluoridated toothpaste and mouth rinses. Mouth rinses containing fluoride in lower strengths are available over-the-counter; stronger concentrations require a doctor’s prescription.
A dentist in his or her office can also apply fluoride to the teeth as a gel, foam, or varnish. These treatments contain a much higher level of fluoride than the amount found in toothpaste and mouth rinses. Varnishes are painted on the teeth; foams are put into a mouth guard, which is applied to the teeth for one to four minutes; gels can be painted on or applied via a mouthguard.
In addition, people with certain conditions may be at increased risk of tooth decay and would, therefore, benefit from additional fluoride treatment. They include people with,
Dry mouth conditionsalso called xerostomia, dry mouth makes people more prone to tooth decay. The lack of saliva makes it harder for food particles to be washed away and acids to be neutralized.
Gum disease, also called periodontitis, can expose more of your tooth and tooth roots to bacteria increasing the chance of tooth decay. Gingivitis is an early stage of periodontitis.
History of frequent cavities, if you have one cavity every year or every other year, you might benefit from additional fluoride.
Presence of crowns and/or bridges or braces, these treatments can put teeth at risk for decay at the point where the crown meets the underlying tooth structure or around the brackets of orthodontic appliances.
Fluoride is safe and effective when used as directed but can be hazardous at high doses (the “toxic” dosage level varies based on an individual’s weight). For this reason, it’s important for parents to carefully supervise their children’s use of fluoride-containing products and to keep fluoride products out of reach of children, especially children under the age of 6.
In addition, excess fluoride can cause defects in the tooth’s enamel that range from barely noticeable white specks or streaks to cosmetically objectionable brown discoloration. These defects are known as fluorosis and occur when the teeth are forming usually in children younger than 6 years. Fluorosis, when it occurs, is usually associated with naturally occurring fluoride, such as that found in well water. If you use well water and are uncertain about the mineral (especially fluoride) content, a water sample should be tested. Although tooth staining from fluorosis cannot be removed with normal hygiene, your dentist may be able to lighten or remove these stains with professional-strength abrasives or bleaches.
Keep in mind, however, that it’s very difficult to reach hazardous levels given the low levels of fluoride in home-based fluoride-containing products.
To find out which fluoride-containing product is right for you, please contact our office and schedule your appointment today.