title: Mandibular movement and frontal craniofacial morphology in orthognathic surgery patients with mandibular deviation and protrusion.
abstract: The present study was conducted to investigate the relationship between mandibular movement (lateral excursion and masticatory movements) and craniofacial morphology in 16 patients with mandibular deviation, using a six degrees-of-freedom measuring device. (i) Mandibular deviation was found to be significantly related to frontal maxillary and occlusal plane angles. (ii) Three-dimensional non-working condylar and incisal path lengths were longer during the lateral excursion to the non-deviated side than to the deviated side, and the incisal path moved antero-inferior. (iii) The lateral motion range of the incisal path was wider during masticatory movement on the non-deviated side than on the deviated side, and the molar and non-working condylar path lengths corresponding to the lateral range of the incisal path were also longer on the non-deviated side. The group with posterior crossbite showed a significantly smaller horizontal range of incisal path, and also significantly smaller frontal projected incisal and molar path angles during masticatory movement on the deviated side than on the non-deviated side. These results suggest that lateral excursion and masticatory movements could be related to craniofacial morphology and posterior crossbite.
authors.affiliation: Division of Orthodontics, Department of Oral Biological Science, Graduate School of Medical and Dental Sciences, Course for Oral Life Science, Niigata University, Niigata, Japan. ogu@dent.niigata-u.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Oguri
authors.forename: K
authors.initials: K
authors.lastname: Yamada
authors.forename: T
authors.initials: T
authors.lastname: Fukui
authors.forename: K
authors.initials: K
authors.lastname: Hanada
authors.forename: S
authors.initials: S
authors.lastname: Kohno
mesh_terms: D000293:Adolescent; D000328:Adult; D003766:Dental Occlusion; D005260:Female; D006801:Humans; D019248:Jaw Fixation Techniques; D007574:Jaw Relation Record; D008310:Malocclusion / Q000601:surgery; D008334:Mandible / Q000002:abnormalities* / Q000503:physiopathology / Q000601:surgery; D008335:Mandibular Condyle / Q000502:physiology* / Q000503:physiopathology / Q000601:surgery; D008409:Mastication; D010027:Osteotomy / Q000379:methods; D011378:Prognathism / Q000601:surgery*; D016059:Range of Motion, Articular / Q000502:physiology