Robust research links poor oral and gum health to everything from heart disease to diabetes to Alzheimer’s. Dr. Jonathan B.

Poor oral hygiene can cause problems ranging from cavities and tooth sensitivity to advanced gum disease. However, proper oral hygiene and regular checkups can easily prevent most dental problems.

She writhed in pain as her infected tooth was hollowed with a drill, its nerve amputated, and then sealed. "I knew this time something was wrong. I could feel my lips," said the Syracuse, New York, ...