Fluoride has the ability to physically bond to your tooth structure making your tooth stronger and more resistant to decay (cavities).
As you age, your gums may recede exposing the cementum which covers the root surfaces of your teeth. This part of your tooth can be sensitive to hot and cold and is softer than enamel making it more susceptible to decay. The fluoride treatment can decrease tooth sensitivity and will fortify the tooth to make it more resistant to root decay.
If you are prone to cavities, the DeKalb dentists at Dekamore Dental recommend getting a fluoride treatment that will help prevent more decay. If you are caries free, the fluoride treatment will help keep your teeth that way.
Unfortunately, a fluoride treatment is not a substitute for brushing and flossing at home! So, keep up the good work!