My hubby had sealant in the early 80's at 17 and has never had any work done to his teeth other then one chipped tooth last year. I'm jealous. The only thing that has made me wonder about the sealant is that in the same year he also had to have appendics removed and later limpnodes in the same area. He has two fingerprint size holes left from surgery. Looks horrible so I wonder if it correlated.