Therapeutic effects of the plane occlusal splint on signs and symptoms of craniomandibular disorders in patients with nocturnal bruxism.

The long-term effects were studied of a full arch maxillary plane occlusal splint on chronic signs and symptoms of craniomandibular disorders (CMD) in 31 patients with nocturnal bruxism. The results revealed that the score and intensity of signs and symptoms in this type of patient fluctuate from day to day and even within a single day. In spite of continuation of nocturnal bruxism, the symptoms of CMD were cured or improved with the long-term use of the occlusal splint. However, in general, the symptoms recurred after discontinuation of splint therapy. The therapeutic mechanisms of the splint during sleep are discussed.