The type of toothbrush bristles you use every day can have a negative impact on your oral health. Dental hygienists know a thing or two about keeping teeth healthy. After all, they spend most of their days looking into people’s mouths and seeing the damage that certain habits can do.Indeed, many common behaviours can cause or worsen dental issues like cavities and gum disease and generally negate the benefits of good oral hygiene. And the consequences of overlooking our oral health go beyond just our mouths. “Your oral health is connected to everything from heart disease to diabetes, pregnancy complications and cognitive health,” registered dental hygienist Iman Zayed told HuffPost. “Taking care of your smile isn’t just cosmetic ― it’s a crucial investment in your overall well-being.”Below, Zayed and other dental hygienists share the tooth-damaging habits and behaviours that they advise against and would never, ever do themselves.They don’t brush their teeth immediately after eating or drinking.“I never brush my teeth right after eating or drinking because I would be brushing in an acidic environment, which can damage my teeth,” said