Document Detail

Effect of different labio-lingual spaces in tray designs on the displacement of and pressure against a mobile tooth.
MedLine Citation:
PMID:  18793354     Owner:  NLM     Status:  MEDLINE    
The present study aimed to examine the effect of custom tray designs on the displacement of mobile tooth and local impression pressures during the impression procedure, using partially edentulous simulation models with six anterior teeth containing a mobile tooth prepared in previous studies. The custom trays were designed by altering the thickness of the respective spaces on the labial and lingual sides of the remaining tooth arch. In previous studies, the mobile tooth was displaced in the labial direction and local impression pressures of the mobile tooth were greater against the lingual side than the labial side for all custom tray designs. Furthermore, the custom trays perforated with holes on the lingual side were effective to reduce mobile tooth displacement, labial and lingual impression pressures against the mobile tooth, and the differences between them. Therefore, the present study was performed focusing on the labial and lingual thickness of spaces in custom tray designs. It was found that mobile tooth displacement, labial and lingual impression pressures against the mobile teeth and their differences were less in trays with spaces>3.0 mm thick on both the labial and lingual sides, but markedly greater in trays with a 1.5 mm-thick space on the labial side. These results indicate that the thickness of spaces on the labial side in the tray should not be reduced to prevent mobile tooth displacement.
Y Nishi; K Tsuru; C Kishita; Y Kamashita; T Hamano; E Nagaoka
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of oral rehabilitation     Volume:  35     ISSN:  1365-2842     ISO Abbreviation:  J Oral Rehabil     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-16     Completed Date:  2009-04-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0433604     Medline TA:  J Oral Rehabil     Country:  England    
Other Details:
Languages:  eng     Pagination:  700-5     Citation Subset:  D; IM    
Denture Prosthodontic Restoration, Advanced Dentistry Center, Kagoshima University Medical and Dental Hospital, Kagoshima, Japan.
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MeSH Terms
Cuspid / physiology
Dental Impression Materials*
Dental Impression Technique / adverse effects,  instrumentation*
Dental Models
Dental Stress Analysis
Incisor / physiology
Jaw, Edentulous, Partially
Maxilla / physiology
Tooth Avulsion / complications*
Tooth Mobility / etiology*
Reg. No./Substance:
0/Dental Impression Materials

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

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