title: Self-reported oral behaviour habits in hyperdivergent and normodivergent facial types.
abstract: The relationship between facial morphology and jaw function remains controversial. The purpose of this study was to investigate differences in self-reported oral behaviour habits between individuals with normodivergent and hyperdivergent facial types. Some 80 cases and controls were individually matched on age, sex ethnicity and treatment stage. The participants were recruited from an orthodontic clinic, and included both adolescents and adults. Habitual oral activity was assessed using the Oral Behaviour Checklist (OBC) based on their experiences in the past 4 weeks. Univariate and bivariate analyses were performed. The sample had a mean age of 17·2 years (SD = 4·6; range = 12-49 years), and was predominantly female (65·0%) and of New Zealand European origin (91·3%). The prevalence of reporting one or more frequently performed habitual muscular behaviour in either study group was over 85% (P > 0·05). There was no difference in total OBC score between the hyperdivergent (25·6; SD: 9·0) and normodivergent group (25·3; SD: 9·9). Moreover, there was no difference in the prevalence of either nocturnal or daytime oral behaviours between the two groups. While this study did not include any objective measures of functional or habitual activity, we found no differences in self-reported oral behaviour habits between normodivergent and hyperdivergent individuals. The findings do not support an association between vertical facial form and habitual muscular activity.
authors.affiliation: Department of Oral Sciences, Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.
authors.forename: J S
authors.initials: JS
authors.lastname: Antoun
authors.affiliation: Department of Oral Sciences, Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.
authors.forename: W M
authors.initials: WM
authors.lastname: Thomson
authors.affiliation: Department of Biochemistry, School of Medical Sciences, University of Otago, Dunedin, New Zealand.
authors.forename: T R
authors.initials: TR
authors.lastname: Merriman
authors.affiliation: Department of Oral Sciences, Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.
authors.forename: M
authors.initials: M
authors.lastname: Farella
mesh_terms: D000293:Adolescent; D000328:Adult; D002012:Bruxism / Q000503:physiopathology; D002648:Child; D003724:Dental Arch / Q000503:physiopathology; D005145:Face / Q000033:anatomy & histology* / Q000502:physiology / Q000503:physiopathology; D005147:Facial Bones / Q000002:abnormalities* / Q000033:anatomy & histology / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000503:physiopathology*; D008409:Mastication / Q000502:physiology; D008875:Middle Aged; D009520:New Zealand; D015203:Reproducibility of Results; D057566:Self Report; D014705:Verbal Behavior / Q000502:physiology; D014716:Vertical Dimension; D015000:Yawning / Q000502:physiology; D055815:Young Adult
keywords: behavioural symptoms; craniofacial morphology; mandibular plane angle; matched case-control studies; oral parafunctions; vertical facial morphology