Enamel, the protective layer around your teeth, cannot regenerate on its own if it’s degraded or removed. Dentists and medical researchers are working on ways of recovering degraded enamel. As of now, however, there is no mainstream or common practice of recovering tooth enamel, so be careful to avoid damaging what you have! Teeth with thin or non-existent layers of enamel appear more yellow and are much more prone to cavities.