An occlusal splint or orthotic device is a specially designed mouth guard for people who grind their teeth, have a history of TMJ pain and dysfunction or have completed a full mouth reconstruction. The occlusal splint is made from an acrylic resin and is designed to guide the jaw as it moves side to side and front to back. This precise custom orthotic device not only protects the teeth from harmful habits, but it supports the TMJ and the muscles that are used in chewing.