title: A prospective optical surface scanning and cephalometric assessment of the effect of functional appliances on the soft tissues.
abstract: The aim of this study was to evaluate the effect of different functional appliances on the soft tissues as assessed by cephalometry and optical surface scanning. Forty-two patients were randomly allocated to Bass, Twin Block (TB), and Twin Block + Headgear (TB + Hg) groups. Lateral cephalograms and optical surface scans were recorded before and after the 10-month study period. ANOVA was used to test the cephalometric variables for differences at the 5 per cent level. The optical surface scanning and cephalometric results were consistent in the sagittal dimension. In the vertical dimension, however, the optical surface scans consistently recorded a greater increase compared with cephalometric values. No differences were detected with regard to cephalometric values at the 5 per cent level. However, the Bass appliance produced greater forward positioning of soft tissue pogonion as assessed by optical surface scanning.
authors.affiliation: Royal London Dental Hospital, UK.
authors.forename: S
authors.initials: S
authors.lastname: McDonagh
authors.forename: J P
authors.initials: JP
authors.lastname: Moss
authors.forename: P
authors.initials: P
authors.lastname: Goodwin
authors.forename: R T
authors.initials: RT
authors.lastname: Lee
mesh_terms: D000704:Analysis of Variance; D002508:Cephalometry; D002648:Child; D005115:Extraoral Traction Appliances; D005145:Face / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D016382:Orthodontic Appliance Design; D017289:Orthodontic Appliances, Functional; D009971:Orthodontics, Corrective / Q000295:instrumentation*; D010363:Pattern Recognition, Automated; D011446:Prospective Studies; D018709:Statistics, Nonparametric; D016896:Treatment Outcome; D014716:Vertical Dimension