Document Detail


Estimated and true hinge axis: a comparison of condylar displacements.
MedLine Citation:
PMID:  1416235     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purposes of the investigation were: i) to compare the condylar displacements from centric slides for 74 sets of casts mounted with an estimated versus a true hinge axis; ii) to determine the error in hinge axes location on the recording of condylar displacements from centric slides; and iii) to define the reproducibility of the Mandibular Position Indicator (MPI), a method of measuring condylar (in vitro) displacements from centric relation position. The findings revealed that routine use of the true hinge axis to obtain MPI readings for analysis of diagnostic casts is not warranted. The mean standard error of MPI double readings attributed to both hinge axes location was 0.4 mm for each component in the sagittal plane. Of the 0.4 mm of mean standard error, 0.2 mm was contributed by the lack of reproducibility of the MPI. The centric relation bite registration technique outlined in this study always captured a superior articulator position of the condylar mechanism. The condylar distractions and deflections from centric relation to maximum intercuspation were primarily in an inferior direction with a smaller posterior component.
Authors:
D P Wood; P H Korne
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Angle orthodontist     Volume:  62     ISSN:  0003-3219     ISO Abbreviation:  Angle Orthod     Publication Date:  1992  
Date Detail:
Created Date:  1992-11-03     Completed Date:  1992-11-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370550     Medline TA:  Angle Orthod     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  167-75; discussion 176     Citation Subset:  D; IM    
Affiliation:
University of Western Ontario, Faculty of Dentistry, Department of Graduate Orthodontics, London, Canada.
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MeSH Terms
Descriptor/Qualifier:
Centric Relation
Dental Articulators*
Dental Occlusion, Centric*
Humans
Jaw Relation Record / instrumentation,  methods*
Mandible / anatomy & histology
Mandibular Condyle / anatomy & histology*
Maxilla / anatomy & histology
Reproducibility of Results
Vertical Dimension
Waxes
Chemical
Reg. No./Substance:
0/Waxes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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