After decay and periodontal disease, clenching and grinding of the teeth is the most common cause of tooth loss. You may notice teeth that are painful to bite on. Other signs are headaches or sore jaws when waking in the morning. Teeth can be protected by bite protection appliances (referred to as bite guards, night guards or occlusal splints). Professionally fabricated bite guards are custom made to the patient’s teeth and are designed and adjusted to optimize fit, tooth protection, and jaw support.