Document Detail

Marginal ridge strength in Class II tunnel restorations.
MedLine Citation:
PMID:  1854444     Owner:  NLM     Status:  MEDLINE    
This in vitro study evaluated the compressive fracture resistance of marginal ridges of teeth with Class II tunnel preparations. Tunnel preparations were completed in extracted human bicuspid and molar teeth (bicuspids, bur size: #2, #4, #6; molars, bur size: #4, #6, #8). Control teeth in both the molar and bicuspid groups remained unprepared. Half the preparations in each group were restored with a glass ionomer cermet. After thermocycling, each marginal ridge was loaded in compression in an Instron Universal testing machine. Fracture values were compared with a two-factor ANOVA. A Dunnet post hoc test was used to compare the strength of each group to its control. Results indicated that up to a certain size, tunnel preparations could be completed without diminishing the strength of the undermined marginal ridges. Placement of a glass-ionomer cermet in the tunnel preparations restored the strength of all but the largest preparations (#6 bur in the bicuspid group) to a level which was not statistically significantly different from the controls.
D J Fasbinder; R D Davis; J O Burgess
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of dentistry     Volume:  4     ISSN:  0894-8275     ISO Abbreviation:  Am J Dent     Publication Date:  1991 Apr 
Date Detail:
Created Date:  1991-08-29     Completed Date:  1991-08-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8806701     Medline TA:  Am J Dent     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  77-82     Citation Subset:  D    
Department of Restorative Dentistry, University of Texas Health Science Center at San Antonio.
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MeSH Terms
Dental Cavity Preparation / adverse effects,  methods*
Dental Restoration, Permanent
Glass Ionomer Cements*
Tooth Fractures / etiology
Reg. No./Substance:
0/Glass Ionomer Cements

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