- Sealants are a safe, painless and low cost way to protect your child's back teeth from decay. A thin layer of sealant is bonded to the chewing surfaces of the back teeth. The sealant forms a hard shield that keeps food and bacteria from getting into the tiny growers in the teeth and causing decay.
Preventing Tooth decay
Fluoride works by hardening the enamel to make the enamel of the teeth harder and more resistant to decay that forms on the sides and in-between teeth. Tooth decay is the destruction of tooth structure and can affect both the enamel (the outer coating of the tooth) and the dentin layer of the tooth.
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in section "Stomatology"