This is why y'all's dentist hectors you to rubber-tip y'all's gums, brush with a superconcentrated fluoride toothpaste, and wear a night guard to control y'all's bruxing (which loosens teeth, opening pockets between teeth and gum, etc.).
Y'all's dentist also wants you to use superconcentrated fluoride toothpaste because he happens to sell it out front.