title: A novel method for fusion of intra-oral scans and cone-beam computed tomography scans for orthognathic surgery planning.
abstract: OBJECTIVE
  To assess the feasibility of a new method to augment the three-dimensional virtual skull model with a detailed surface model of the dentition produced by intra-oral scanning, compared to the conventional triple scan procedure.
  
  
  METHODS
  In four patients who were planned for bimaxillary orthognathic surgery, the conventional triple scan procedure was carried out to create an augmented model. During scanning the patient wears a modified wax bite containing radio-opaque markers. An additional CBCT and laser scan of the wax bite and an intra-oral scan of the dentition were acquired. Surface-based and marker-based matching procedures were performed to integrate the intra-oral scans into the CBCT scan of the patient. The accuracy of the proposed method was assessed by measuring the distance between the occlusal surfaces of the registered intra-oral scans and the augmented model.
  
  
  RESULTS
  Mean distances between the ios-dental cast registration and the augmented model were 0.30 mm (SD 0.20) and 0.27 mm (SD 0.20) for the upper and lower jaw, respectively.
  
  
  CONCLUSIONS
  Intra-oral scans provide an accurate representation of the dental arches compared to the AlgiNot-dental casts and can be fused with CBCT scans.
authors.affiliation: Department of Orthodontics and Craniofacial Biology, Radboud University Medical Centre, Nijmegen, The Netherlands. Electronic address: Olivier.deWaard@radboudumc.nl.
authors.forename: Olivier
authors.initials: O
authors.lastname: de Waard
authors.affiliation: Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands.
authors.forename: Frank
authors.initials: F
authors.lastname: Baan
authors.affiliation: Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands.
authors.forename: Luc
authors.initials: L
authors.lastname: Verhamme
authors.affiliation: Department of Orthodontics and Craniofacial Biology, Radboud University Medical Centre, Nijmegen, The Netherlands.
authors.forename: Hero
authors.initials: H
authors.lastname: Breuning
authors.affiliation: Department of Orthodontics and Craniofacial Biology, Radboud University Medical Centre, Nijmegen, The Netherlands.
authors.forename: Anne Marie
authors.initials: AM
authors.lastname: Kuijpers-Jagtman
authors.affiliation: Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands.
authors.forename: Thomas
authors.initials: T
authors.lastname: Maal
mesh_terms: D054893:Cone-Beam Computed Tomography / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D007574:Jaw Relation Record; D003765:Models, Dental; D057909:Orthognathic Surgery; D010347:Patient Care Planning; D016896:Treatment Outcome
keywords: 3D planning; Augmented model; CBCT; Intra-oral scan; Orthognathic surgery; Wax bite