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Yet even with the proliferation of fluoride-containing toothpastes and dental sealants, tooth decay is still the most common chronic disease affecting American children, and the average senior citizen is missing at least 10 permanent teeth.

These included manufacturing defects affecting parts of fuselages, tail and rudder assemblies, as well as sealants applied as protection against the effect of lightning strikes in central fuel tanks.

Within those pipes, the catalyst could generate a polymer that could act as a sealant to heal cracks in the pipes, which are a common source of methane leakage.

You must have a sealant painted on your tooth or risk bacteria creating holes in it.

What ensues is nearly two hours of the false starts and second-guessing that romances use as sealant.