title: Incisal paths during habitual mouth opening and closing movements of children with anterior reverse bite in the early mixed dentition.
abstract: The purpose of this study was to investigate whether the pathways of habitual mouth opening and closing in children with anterior reverse bite in the early mixed dentition differed from those of children with normal occlusion. The two subject groups for this study were composed of ten children with anterior reverse bite (reverse bite group) and twelve children with normal occlusion (normal occlusion group), respectively. These movements were measured by an optoelectronic analyzing system with six degrees of freedom. Movements of the incisal point were projected on the sagittal plane to characterize the paths, and sagittal angles between the incisal path and the horizontal plane were calculated and compared. Opening and closing sagittal angles in the reverse bite group were almost equal over the entire pathway, indicating that the pathways of habitual mouth opening and closing were similar. In contrast, all opening and closing sagittal angles in the normal occlusion group were different, especially close to maximum intercuspation, indicating that their pathway of habitual mouth opening differed from their mouth closing pathway. In conclusion, children with anterior reverse bite in the early mixed dentition have different patterns of habitual mouth opening and closing movements than children with normal occlusion.
authors.affiliation: Section of Pediatric Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku Fukuoka 812-8582 Japan.
authors.forename: Kyoko
authors.initials: K
authors.lastname: Satoh
authors.forename: Youichi
authors.initials: Y
authors.lastname: Yamasaki
authors.forename: Haruaki
authors.initials: H
authors.lastname: Hayasaki
authors.forename: Megumi
authors.initials: M
authors.lastname: Nishi
authors.forename: Minoru
authors.initials: M
authors.lastname: Nakata
mesh_terms: D000704:Analysis of Variance; D002508:Cephalometry; D002648:Child; D003766:Dental Occlusion; D003768:Dental Occlusion, Centric; D003818:Dentition, Mixed; D004581:Electronics / Q000295:instrumentation; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation; D007180:Incisor / Q000473:pathology*; D008297:Male; D008310:Malocclusion / Q000503:physiopathology*; D008334:Mandible / Q000503:physiopathology*; D009068:Movement; D055095:Optics and Photonics / Q000295:instrumentation; D011378:Prognathism / Q000503:physiopathology*