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Dental sealants are thin plastic coatings which are applied to the chewing surfaces of the back teeth to prevent decay. Most tooth decay in children and adolescents occurs on the chewing surfaces of these back molars. This is because molars have irregular surfaces with pits and grooves which tend to trap food and bacterial debris. Sealants flow into and coat these pits and grooves so that bacteria cannot multiply and cause decay.
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Which Teeth are Suitable for Sealants?

The teeth most likely to benefit from sealant application are the first and second molars and first and second bicuspids just after they have erupted and before they have had a chance to decay. First molars generally appear at about six years of age and second molars and bicuspids at about twelve years of age. Children between the ages of five and fourteen benefit most from sealants. After an examination, a dentist will determine which teeth can be sealed.
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How are Sealants Applied?

Applying sealants is quite simple. First, the teeth are cleaned. Then the teeth to be sealed are dabbed with a very mild acid solution similar in strength to vinegar or lemon juice. This roughens the tooth surface slightly so that the sealant will bond to it properly. After the tooth is prepared, the sealant is painted onto the tooth. It flows into the pits and grooves and hardens under a special blue light. After sealing, bacteria cannot reach the pits and grooves, and cause decay. Applying sealants requires no drilling or removal of the tooth surface.
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Are Sealants Visible?

Yes, sealants can be seen upon close examination of the back teeth. Sealants can be clear, white or slightly tinted. Remember, sealants are used only on the back teeth and cannot be seen when a child talks or smiles. Parents can check children's teeth periodically to see if the sealants are still in place.
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Will Sealants Make Teeth Feel Different?

Sealants will not result in any change in bite because they are very thin and only fill the pits and grooves. At first, the tooth may feel bulkier, but a few days of normal chewing will wear the sealant into place.
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Have Sealants been Thoroughly Tested?

Yes, children all over the world have had their teeth sealed in controlled clinical studies. These studies have shown sealants to be effective, easy to apply and are inexpensive and non toxic. Sealants are approved and have been recommended by dental associations worldwide.
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How Long Will Dental Sealants Last?

A sealant application can last up to five years and often longer. Sealants should be checked regularly and reapplied when they appear to have worn off. Because teeth are most susceptible to decay when they are young, preventing decay during the first five to fifteen years after a tooth erupts is critical.
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Will Sealants Replace Fluoride?

No, fluorides such as fluoride toothpaste, and fluoride mouth rinse help prevent decay on the smooth surfaces of teeth. However, fluorides have less effect on the rough, pitted chewing surfaces of the back teeth where food particles and decay-producing bacteria are trapped. Sealants, however, are only effective on uneven chewing surfaces.
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How Do Sealants Fit into a Preventive Dentistry Program?

For maximum benefit, sealants should be used as part of a child's total preventive dental care. A dentist should examine the child's teeth and gums regularly to check bite, tooth eruption, and the condition of both hard and soft tissues. A complete preventive dentistry program also includes: brushing and flossing, use of fluorides, good nutrition, and regular dental check-ups.
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Why is Sealing a Tooth Better Than Waiting for Decay and Filling a Cavity?

Sealants help to maintain sound, intact teeth. Decay destroys the structure of the tooth. Each time a tooth is filled or a filling is replaced, additional tooth structure is lost. Appropriate use of sealants can save time, money and the discomfort associated with restorative dental procedures.
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What if Microscopic Amounts of Decay are Inadvertently Sealed?

If decay and decay-causing bacteria are trapped beneath the sealant, they will stop multiplying. The bacteria will be cut off from the oxygen and carbohydrates needed to flourish. Their numbers will decline and decay will not progress.
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Do Sealants Cost Less Than Fillings?