Occlusal guards are custom acrylic removable appliances that fit over the teeth and are used to help prevent the wearing down of teeth during sleep due to grinding and clenching. Sometimes these guards are also worn during the day if the patient’s problems are more advanced. The purpose of the occlusal guard is to prevent further tooth damage due to the clenching and grinding of the teeth. It also helps to prevent more wear on the surface of the teeth. The guards help relax the jaws, which in the process lessens the teeth grinding and clenching. Therefore the occlusal guard can help protect the jaw from joint problems that could eventually occur.