title: Perioral muscle action and the incisor relationship: a new method of study.
mesh_terms: D000293:Adolescent; D002648:Child; D005149:Facial Expression; D005152:Facial Muscles / Q000502:physiology*; D005260:Female; D006801:Humans; D007180:Incisor / Q000033:anatomy & histology*; D008046:Lip / Q000502:physiology*; D008297:Male; D008310:Malocclusion / Q000503:physiopathology*; D009126:Muscle Relaxation; D014716:Vertical Dimension