Scientists think it has to do with inflammation. Researchers are still trying to figure out exactly how this might work. But scientists know that gum disease involves a lot of swelling. And inflammation can have all sorts of harmful affects throughout the body, including in the brain. Do you mean that gum disease could cause swelling in the brain that damages brain tissue. Maybe. Scientists are still looking into the details. But other studies have uncovered links between dental health and heart disease. The point is that oral health isn’t just about teeth and gums. Brushing and flossing are really important for overall health. Exactly.