A custom-made nightguard is recommended for those who grind/clench their teeth to prevent further wear or breakage of the tooth structure. Use of a nightguard can also help relax the TMJ (jaw joint), muscles of the face, head and neck thus preventing excess strain and the subsequent discomfort that may come with it. Keep the TMJ joint in neutral position with a night guard fitted to your mouth. Night guards that are custom fit by the dentist leave the TMJ (jaw joint) in neutral position. The guard trains the joint to relax and relieves pressure.