I have heard about some protective tooth coatings called Sealants. How do these work?

These are called fissure sealants. Basically, a fissure sealant is a white resin which is placed on chewing surfaces of teeth to prevent food and bacteria being trapped in the little crevices that can't be reached by saliva or a tooth brush. A properly placed sealant will help reduce the chance of getting decay in that tooth. Sealants do need to be regularly checked and repaired if they are worn down or lost. There is a risk of decay occurring around the edges and under a sealant if bits break of, so early repairs are essential.

Molar Tooth with Deep Fissures

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 Fissure Sealant placed providing a smooth surface

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