title: Articulator-related registration--a simple concept for minimizing eccentric occlusal errors in the articulator.
abstract: OBJECTIVE
  The purpose of this study was to develop an easy-to-use procedure for individual registration and to test its accuracy. Unlike common principles, the method should be based on a transfer of the articulator geometry to the patient.
  
  
  METHODS
  The system consists of an articulator holding a bite plate in a standard position. The bite plate connects to an electronic recording system, which transfers the articulator's condylar points virtually to the patient's mandible by a centric relation record. The trajectories of the transferred points are recorded during mandibular protrusions and laterotrusions. From the trajectories, sagittal condylar and Bennett angles are measured and are adjusted at the articulator after mounting of the casts via the bite plate. Using a mechanical testing device, the accuracy of the measured angles was examined by comparison with preset values varying from 10 to 60 degrees (condylar angle) and from 0 to 40 degrees (Bennett angle) in 10-degree increments.
  
  
  RESULTS
  The mean deviations of measured condylar angles from preset values ranged between 1.5 and 0 degrees. The mean deviations of the Bennett angles ranged from -0.5 to -1.3 degrees.
  
  
  CONCLUSIONS
  The transfer of articulator geometry to the patient reduces the number of individual parameters necessary to imitate jaw motion to the condylar and Bennett angles. This leads to a significant simplification in registration and cast transfer. Since the required parameters are recorded with high accuracy, the method could be an alternative to traditional sophisticated instrumental registration.
authors.affiliation: Department of Prosthodontics, University of Erlangen, Germany. peter.proeschel@rzmail.uni-erlangen.de
authors.forename: Peter
authors.initials: P
authors.lastname: Pröschel
authors.forename: Thomas
authors.initials: T
authors.lastname: Morneburg
authors.forename: Alfons
authors.initials: A
authors.lastname: Hugger
authors.forename: Bernd
authors.initials: B
authors.lastname: Kordass
authors.forename: Peter
authors.initials: P
authors.lastname: Ottl
authors.forename: Wilhelm
authors.initials: W
authors.lastname: Niedermeier
authors.forename: Manfred
authors.initials: M
authors.lastname: Wichmann
mesh_terms: D016302:Centric Relation; D003725:Dental Articulators; D003766:Dental Occlusion; D004581:Electronics / Q000295:instrumentation; D006801:Humans; D007574:Jaw Relation Record / Q000295:instrumentation / Q000379:methods*; D008334:Mandible / Q000033:anatomy & histology / Q000502:physiology; D008335:Mandibular Condyle / Q000033:anatomy & histology / Q000502:physiology; D003765:Models, Dental; D009068:Movement; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D014584:User-Computer Interface