title: Head angulation and variations in the maxillomandibular relationship. Part II: The effects on facial contour and lip support.
abstract: Twelve edentulous patients were evaluated for changes in facial contour and lip support when the head was progressively tilted backward. The mandibular facial contour changes did not occur in a progressive cause and effect type of relationship. A trend pattern could not be discerned. The maxillary facial contour did have a significant progressive cause and effect relationship in two of the 12 patients and was a positive relationship. As the angles were increased, the displacement of the maxillary facial contour increased anteriorly. The question as to why the maxillary facial contour had a significant progressive cause-and-effect relationship in two of the 12 patients and the mandibular facial contour did not remain unresolved. In a practical sense, it seems reasonable to establish the maxillomandibular relationship with the patient in a comfortable position. This and the ease of recording by the dentist are the primary considerations.
mesh_terms: D000328:Adult; D000368:Aged; D002508:Cephalometry; D003766:Dental Occlusion; D005145:Face / Q000033:anatomy & histology*; D005260:Female; D006257:Head / Q000033:anatomy & histology*; D006801:Humans; D007575:Jaw, Edentulous / Q000473:pathology*; D008046:Lip / Q000033:anatomy & histology*; D008297:Male; D008875:Middle Aged; D011187:Posture; D014716:Vertical Dimension