title: Three-dimensional digital models for rating dental arch relationships in unilateral cleft lip and palate.
abstract: Objective : To determine the reliability and reproducibility of using three-dimensional digital models as an alternative to plaster models for rating dental arch relationships in patients born with unilateral cleft lip and palate. Design : Reliability and reproducibility study. Methods : Study models of 45 patients born with unilateral cleft lip and palate were made available in plaster and three-dimensional digital models. Records were scored a week apart by three examiners using the 5-year-olds' index reference models in the same two formats as the patient models. To assess reproducibility the study was repeated 4 weeks later under similar conditions to minimize the influence of memory bias on the results. The reliability of using the three-dimensional digital models was determined by comparing the scores for each examiner with the plaster model scores. Results : Weighted kappa statistics indicated repeatability for the plaster models was very good (.83 to .87). For the three-dimensional digital models it was good to very good (.74 to .83). Overall, the use of the three-dimensional digital models showed good agreement with the plaster model scores on both occasions. Conclusion : Three-dimensional digital models appear to be a good alternative to plaster models for assessing dental arch relationships using the 5-year-olds' index.
authors.forename: O
authors.initials: O
authors.lastname: Chawla
authors.forename: N E
authors.initials: NE
authors.lastname: Atack
authors.forename: S A
authors.initials: SA
authors.lastname: Deacon
authors.forename: S D
authors.initials: SD
authors.lastname: Leary
authors.forename: A J
authors.initials: AJ
authors.lastname: Ireland
authors.forename: J R
authors.initials: JR
authors.lastname: Sandy
mesh_terms: D002971:Cleft Lip; D002972:Cleft Palate; D003724:Dental Arch; D006801:Humans; D003765:Models, Dental; D015203:Reproducibility of Results