title: Randomized controlled trial comparing direct intraoral digitization and extraoral digitization after impression taking.
abstract: This study aimed to evaluate the correspondence of intraoral digitization (ID) with extraoral digitization (ED) after impression taking. One-stage putty-and wash impressions and ID were carried out in a randomized order for 10 subjects. The impressions were used to make casts, which were then subjected to ED. ID datasets were aligned to create computer-aided design reference models. Deviations between ID and ED were calculated. The mean positive and negative deviations were 37.7 and -48.4 µm, respectively, for one quadrant. The results showed that the ID system is well suited for the acquisition of single-tooth restorations and is of limited suitability for the acquisition of small multiple unit restorations.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Quaas
authors.forename: René
authors.initials: R
authors.lastname: Loos
authors.forename: Heike
authors.initials: H
authors.lastname: Rudolph
authors.forename: Ralph G
authors.initials: RG
authors.lastname: Luthardt
mesh_terms: D001641:Bicuspid / Q000033:anatomy & histology; D017076:Computer-Aided Design; D003481:Cuspid / Q000033:anatomy & histology; D003724:Dental Arch / Q000033:anatomy & histology; D003761:Dental Impression Technique; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods; D007180:Incisor / Q000033:anatomy & histology; D008437:Maxilla / Q000033:anatomy & histology; D003765:Models, Dental; D008963:Molar / Q000033:anatomy & histology; D010781:Photography / Q000295:instrumentation