Temporomandibular joint dysfunction is associated with a variety of symptoms: teeth grinding (bruxism) that can wear teeth down over time, pain in the muscles involved in chewing (facial and cervical), clicking and/or difficulty opening and/or closing the mouth, and headaches or pain in the TMJ and neck. There are various different treatment options, the most frequent and least invasive being the mouthguard. A mouthguard is a rigid protective device custom-made for each patient to fit perfectly over either the upper or lower dental arch. It prevents the teeth from coming into contact with each other and gently realigns the mandibular joint. By correcting the position of the jaw, the mouthguard prevents muscle pain and tooth wear.