Stop grinding The British Dental Association (BDA) says that, thanks to a subconscious habit of teeth grinding, up to 20 per cent of high-flying executives now need major repair work on their teeth, having worn away the natural enamel coating. "We tell people to look at areas of their lives that are giving them stress," says Jacinta Yeo, BDA spokeswomen. "If the problem persists, ask your dentist for a plastic mouthguard that prevents tooth-to-tooth contact at night."