title: Changes in occlusal state of patients with mandibular prognathism after orthognathic surgery: a pilot study.
abstract: This study examined the occlusal state of patients with mandibular prognathism and compared it with that of adults with normal occlusion (controls). It also examined changes in occlusal state after orthognathic operations in these patients. The values of occlusal contact area and bite force in patients before operation were significantly lower than in controls, and occlusal pressure in patients was higher than in controls. The occlusal contact area and bite force of the patients 1 month after the operation had decreased to below preoperative values. These values 12 months after the operation had increased by 2.0 and 1.8 times in women and 1.4 and 1.4 times in men, respectively, compared with preoperative values. However, absolute values remained extremely low compared with those of controls. In contrast to the above, occlusal pressure reached its maximum value 1 month after the operation and at 12 months it was close to the value for controls.
authors.affiliation: Department of Oral Surgery, Sapporo Medical University School of Medicine, S1 W16, Sapporo 060-0061, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Nagai
authors.forename: N
authors.initials: N
authors.lastname: Tanaka
authors.forename: M
authors.initials: M
authors.lastname: Noguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Suda
authors.forename: T
authors.initials: T
authors.lastname: Sonoda
authors.forename: G
authors.initials: G
authors.lastname: Kohama
mesh_terms: D000328:Adult; D001732:Bite Force; D016022:Case-Control Studies; D003766:Dental Occlusion; D003799:Dental Stress Analysis; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000002:abnormalities / Q000601:surgery*; D019647:Oral Surgical Procedures; D010865:Pilot Projects; D011378:Prognathism / Q000601:surgery*; D016896:Treatment Outcome