title: Accuracy of a three-dimensional dentition model digitized from an interocclusal record using a non-contact surface scanner.
abstract: For orthodontic treatment, it is important to assess the dental morphology, as well as the position and inclination of teeth. The aim of this article was to develop an efficient and accurate method for the three-dimensional (3D) imaging of the maxillary and mandibular dental morphology by measuring interocclusal records using an optical scanner.
  
  
  
  The occlusal and incisal morphology of participants was registered in the intercuspal position using a hydrophilic vinyl polysiloxane and digitized into 3D models using an optical scanner. Impressions were made of the maxilla and mandible in alginate materials in order to fabricate plaster models and created into 3D models using the optical scanner based on the principal triangulation method. The occlusal and incisal areas of the interocclusal records were retained. The buccal and lingual areas were added to these regions entirely by the 3D model of the plaster model. The accuracy of this method was evaluated for each tooth, with the dental cast 3D models used as controls.
  
  
  
  The 3D model created from the interocclusal record and the plaster model of the dental morphology was analysed in 3D software. The difference between the controls and the 3D models digitized from the interocclusal records was 0.068±0.048mm, demonstrating the accuracy of this method.
  
  
  
  The presence of severe crowding may compromise the ability to separate each tooth and digitize the dental morphology.
  
  
  
  The digitization method in this study provides sufficient accuracy to visualize the dental morphology, as well as the position and inclination of these teeth.
authors.affiliation: *Department of Oral Biology & Engineering, Integrated Health Sciences and kihara-takuya@hiroshima-u.ac.jp.
authors.forename: Takuya
authors.initials: T
authors.lastname: Kihara
authors.affiliation: **Department of Orthodontics, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Yoshimi
authors.affiliation: *Department of Oral Biology & Engineering, Integrated Health Sciences and.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Taji
authors.affiliation: *Department of Oral Biology & Engineering, Integrated Health Sciences and.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Murayama
authors.affiliation: **Department of Orthodontics, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Japan.
authors.forename: Kotaro
authors.initials: K
authors.lastname: Tanimoto
authors.affiliation: *Department of Oral Biology & Engineering, Integrated Health Sciences and.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Nikawa
mesh_terms: D000328:Adult; D003766:Dental Occlusion; D003792:Dental Records; D019229:Dentition, Permanent; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008334:Mandible / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D008437:Maxilla / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D003765:Models, Dental; D061848:Optical Imaging / Q000379:methods*; D011145:Polyvinyls; D012833:Siloxanes; D014070:Tooth / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D055815:Young Adult
chemical_list: D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane