What is Bruxism? Definition: According to AAOFP bruxism is a diurnal or nocturnal parafunctional activity including clenching, bracing, gnashing and grinding of the teeth. Ramfjord 1996: As a habitual grinding of teeth where individual is not chewing or swallowing. Rubina 1986: Indicates a nonfunctional contact of teeth which may include clenching, gnashing, grinding and tapping [&hellip