title: Electronic central bearing point as registration method in individuals with and without temporomandibular disorders.
abstract: OBJECTIVE
  The aim of this study was to examine different central bearing point methods in patients with and without temporomandibular disorders (TMD) by an experienced and unexperienced examiner.
  
  
  METHODS
  The 20 fully dentulous subjects were screened for TMD based on the Research Diagnostic Criteria for TMD and distinguished into functional impaired and functional healthy groups. The mandibular relationship was recorded by an electronic central bearing tracing device (IPR-System, IPR GmbH, Oldenburg, Germany) with an integrated pressure sensor. Three bite registration methods were performed using this device: initial neuromuscular position, final neuromuscular position after dynamic sequences with the intraoral pin (=neuromuscular deprogramming), and centric relation guided manually by an experienced and an unexperienced examiner.
  
  
  RESULTS
  The neuromuscular positions before and after neuromuscular deprogramming were not significantly different (paired t test as a group comparison test: transverse: p = 0.369; sagittal: p = 0.486). Both positions were significantly anterior in comparison to the manually guided centric relation (paired t test as a group comparison test: p < 0.0001). The neuromuscular positions before and after deprogramming tend to have high scattering values.
  
  
  CONCLUSIONS
  By means of the central bearing point method, the manually guided centric relation is the one which is sufficiently reproducible. It seems doubtful to take the significant anterior neuromuscular position for a definite reconstruction.
  
  
  CONCLUSIONS
  Using the central bearing point method, the manually guided centric relation should be preferred, whereas the neuromuscular position should not be used for definite reconstructions.
authors.affiliation: Charité - Universitätsmedizin Berlin, CC3, Department of Prosthodontics, Gerodontology and Craniomandibular Disorders, Aßmannshauserstraße 4-6, 14197, Berlin, Germany.
authors.forename: Antje
authors.initials: A
authors.lastname: Zorn
authors.affiliation: Charité - Universitätsmedizin Berlin, CC3, Department of Prosthodontics, Gerodontology and Craniomandibular Disorders, Aßmannshauserstraße 4-6, 14197, Berlin, Germany. ingrid.peroz@charite.de.
authors.forename: Ingrid
authors.initials: I
authors.lastname: Peroz
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D016302:Centric Relation; D003761:Dental Impression Technique; D005260:Female; D006801:Humans; D007574:Jaw Relation Record / Q000379:methods*; D008297:Male; D008875:Middle Aged; D003765:Models, Dental; D011446:Prospective Studies; D013705:Temporomandibular Joint Disorders / Q000503:physiopathology*
keywords: Centric bearing device; Centric relation; Maxillomandibular relationship; TMD
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