title: Determination of tooth-size discrepancy and Bolton ratios using Bibliocast Cécile3 digital models.
abstract: The purpose of this study was to compare digitized models with their current gold-standard plaster models for tooth-size discrepancy and Bolton analysis. Fifteen pairs of plaster models were obtained from orthodontic patients with permanent dentition. These were digitized and evaluated using the Bibliocast Cécile3 v2.5 software. Two examiners measured three times the mesiodistal width of all the teeth and the arch length, and determined the tooth-size discrepancy and Boltońs ratios. The plaster models were measured using a digital vernier caliper. Interclass correlation (ICC), mean differences and paired t-tests were used for comparisons and statistical analysis. The ICC of the digital models were 0.930 (0.852≤ICC<0.973) for the intra-examiner and 0.929 (0.829≤CCI<0.974) for the inter-examiner. The mean differences between plaster and digital models with respect to the anterior and overall Boltońs ratios for examiner 1 was 0.34 mm for both and for examiner 2 were 0.28 mm and 0.21 mm respectively. Although digital model measurements were lower than plaster (p<0.05), these were considered clinically insignificant (differences<0.1mm). The determination of the tooth-size discrepancy and Bolton analysis using digital models and the Bibliocast Cécile3 software are an acceptable alternative to use in clinical practice.
authors.affiliation: Orthodontic Post Graduate Program, School of Dentistry, University of São Paulo, São Paulo, Brazil.
authors.forename: Gustavo Adolfo
authors.initials: GA
authors.lastname: Watanabe-Kanno
authors.forename: Jorge
authors.initials: J
authors.lastname: Abrão
authors.forename: Hiroshi Miasiro
authors.initials: HM
authors.lastname: Junior
authors.forename: Alfonso
authors.initials: A
authors.lastname: Sánchez-Ayala
authors.forename: Manuel O
authors.initials: MO
authors.lastname: Lagravère
mesh_terms: D000293:Adolescent; D002133:Calcium Sulfate; D002648:Child; D003198:Computer Simulation; D003724:Dental Arch / Q000033:anatomy & histology*; D019229:Dentition, Permanent; D006801:Humans; D008310:Malocclusion / Q000175:diagnosis*; D003765:Models, Dental; D016011:Normal Distribution; D015588:Observer Variation; D009811:Odontometry; D012015:Reference Standards; D015203:Reproducibility of Results; D012986:Software Validation; D014070:Tooth / Q000033:anatomy & histology*
chemical_list: D002133:Calcium Sulfate