TMJ or TMD (temporomandibular joint or temporomandibular disorder) can cause bite instability and various dental problems that could be prevented with a proper diagnosis and treatment plan. Grinding or clenching of your teeth, headaches, muscle soreness, and excessive wear of teeth are just a few of the symptoms caused by TMD. A comprehensive examination aids in identifying people with TMD and those that are displaying the signs of developing TMD. Preventive treatment includes the fabrication of an orthosis (orthotic mouth guard, splint). The splint re-establishes neuromuscular harmony of the teeth with the jaw joints and muscles and can help reduce symptoms. For each patient, a healthy bite is paramount for dental treatment success.