Document Detail


Condylar repositioning in mandibular retrusion.
MedLine Citation:
PMID:  11125347     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
STATEMENT OF PROBLEM: There has been debate about which anteroposterior maxillomandibular relationship should be used in fixed and removable prosthodontics for patients without a definite maximal intercuspation. The choice has important implications for complete denture fabrication in which any guidance to the previous dentulous maximal intercuspal position is missing. PURPOSE: This study was designed to estimate the posterior displacement that takes place at the mandibular condyles and occlusal surfaces when the mandible is moved from maximal intercuspal position to the most retruded mandibular position. MATERIAL AND METHODS: Articulated occlusal models of 18 subjects with a natural dentition and well-defined maximal intercuspation were studied. Models were rearticulated in retruded contact position, and the original vertical dimension of occlusion was restored by eliminating all interfering occlusal contacts on the retruded path of closure. Measurement of change in condylar position was estimated using a SAM2 articulator with condylar position indicator. Posterior displacement at the occlusal surfaces was measured with a traveling microscope. RESULTS: Condylar analog retrusion in the horizontal plane at the initial retruded contact position varied from 0.6 to 2.4 mm (mean 1.0 +/- 0.4 mm); however, after occlusal adjustment to restore the original vertical dimension of occlusion, retrusion was reduced to a range of 0 to 0.4 mm (mean 0.2 +/- 0.1 mm). Retrusion at the occlusal surfaces was found to vary from 0.4 to 1.5 mm (mean 0.7 +/- 0.3 mm) at retruded contact position; however, after occlusal adjustment, retrusion was reduced to a range of 0 to 0.5 mm (mean 0.2 +/- 0.1 mm). CONCLUSION: Posterior displacement at both the occlusal surfaces and the condyles was small when interfering occlusal contacts on the retruded path of closure were removed.
Authors:
J Wilson; R I Nairn
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of prosthetic dentistry     Volume:  84     ISSN:  0022-3913     ISO Abbreviation:  J Prosthet Dent     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2001-02-02     Completed Date:  2001-02-02     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0376364     Medline TA:  J Prosthet Dent     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  612-6     Citation Subset:  D; IM    
Affiliation:
College of Medicine, University of Wales, Cardiff, Wales, UK. wilsonj@cardiff.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Adult
Dental Articulators / statistics & numerical data
Dental Models / statistics & numerical data
Dental Occlusion*
Denture Design / methods
Denture, Complete
Humans
Jaw Relation Record / methods
Mandibular Condyle / physiology*
Reference Values
Retrognathism / diagnosis*

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


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