title: Relationship between disc displacement and morphologic features of skeletal Class III malocclusion.
abstract: The present study assessed the relationship between disc displacement and facial morphologic features in 48 patients with skeletal Class III malocclusion. Clinical examination, standardized lateral oblique temporomandibular joint radiographs, and cephalographs were used to investigate this relationship. Disc displacement was evaluated by the presence of joint sounds (clicking and crepitation) or restricted condylar translation at maximal mouth opening. Thirty-two patients with signs of disc displacement were compared with 16 patients without signs of disc displacement. Results showed that patients with signs of disc displacement had a significantly larger gonial angle and/or SN-MP of the mandible. Thus, morphologic features of patients with skeletal Class III malocclusion may represent a risk factor for the development of disc displacement.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Health Sciences University of Hokkaido, School of Dentistry, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Muto
authors.forename: J
authors.initials: J
authors.lastname: Kawakami
authors.forename: M
authors.initials: M
authors.lastname: Kanazawa
authors.forename: H
authors.initials: H
authors.lastname: Ishii
authors.forename: S
authors.initials: S
authors.lastname: Uga
authors.forename: K
authors.initials: K
authors.lastname: Yokoyama
authors.forename: M
authors.initials: M
authors.lastname: Takeuchi
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D002508:Cephalometry; D005145:Face / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000209:etiology*; D008297:Male; D008313:Malocclusion, Angle Class III / Q000150:complications* / Q000473:pathology / Q000503:physiopathology; D008335:Mandibular Condyle / Q000503:physiopathology*; D012307:Risk Factors; D019224:Temporomandibular Joint Disc / Q000503:physiopathology; D013705:Temporomandibular Joint Disorders / Q000209:etiology* / Q000503:physiopathology