Even if the enamel has fluoride in it, there are pits and grooves on the chewing surface of most back teeth. Since food and plaque are pushed into these surfaces each time you chew and these grooves are more narrow than a single toothbrush bristle, these are prime location for decay to start. Sealants are plastic-like material that is painlessly flowed into these grooves, making them smooth and therefore less likely to get chewing surface decay. A properly placed sealant is extremely effective in preventing chewing surface cavities. Not only is plaque the culprit in developing decay, but also the cause of gum and periodontal disease.
Children can get gum disease and teens can develop periodontal disease.
The frequency of cleanings is dependent upon home care and dental history. Dentistry for your children is much different than when you were a child. Techniques are more comfortable and dentists are trained to work with children. A good relationship with your dentist will make your child more comfortable at their visit.