My father doesn't eat sweets. He has a very healthy diet - whole grains, vegetables, etc. Never had a cavity nor gum disease. Because of that he never went to

My father doesn't eat sweets. He has a very healthy diet - whole grains, vegetables, etc. Never had a cavity nor gum disease. Because of that he never went to the dentist to have a check up. He ended up loosing all his teeth from hardened plaque below the gum line. His teeth just fell off, one after another, because he never learned good dental hygiene.