Nightguards are prescribed for several reasons. Many people grind and clench during the nighttime and this leads to tooth wear, trauma, temperature sensitivity, bite issues, and cosmetic concerns. When people brux, or grind their teeth, the TMJ (temporomandibular joint) can be damaged and muscles become tender or painful. Nightguards, a.k.a splints, prevent tooth wear and reduce strain on the TMJ which relaxes the muscles of the head and neck. Sport Mouth Guards- custom fit guards to protect teeth/gums from trauma during sports activities.