Advanced Search

Journal Navigation

Journal Home

Subscriptions

Archive

Contact Us

Table of Contents

CiteULike is a free service for managing and discovering scholarly references - click here to get started.

Sign In to gain access to subscriptions and/or personal tools.
Journal of Dental Research
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to Saved Citations
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Alster, D.
Right arrow Articles by Davidson, C.L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Alster, D.
Right arrow Articles by Davidson, C.L.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Tensile Strength of Thin Resin Composite Layers as a Function of Layer Thickness

D. Alster

Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam, ACTA, Louwesweg 1, 1066 EA Amsterdam, The Netherlands

A.J. Feilzer

Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam, ACTA, Louwesweg 1, 1066 EA Amsterdam, The Netherlands

A.J. De Gee

Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam, ACTA, Louwesweg 1, 1066 EA Amsterdam, The Netherlands

C.L. Davidson

Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam, ACTA, Louwesweg 1, 1066 EA Amsterdam, The Netherlands

As a rule, cast restorations do not allow for free curing contraction of the resin composite luting cement. In a rigid situation, the resulting contraction stress is inversely proportional to the resin layer thickness. Adhesive technology has demonstrated, however, that thin joints may be considerably stronger than thicker ones. To investigate the effects of layer thickness and contraction stress on the tensile strength of resin composite joints, we cured cylindrical samples of a chemically initiated resin composite (Clearfil F2) in restrained conditions and subsequently loaded them in tension. The samples had a diameter of 5.35 mm and thicknesses of 50, 100, 200, 300, 400, 500, 600, and 700 µm, 1.4 mm, or 2.7 mm. None of the samples fractured due to contraction stress prior to tensile loading. Tensile strength decreased gradually from 62 ± 2 MPa for the 50-µm layer to 31 ± 4 MPa for the 2.7-mm layer. The failures were exclusively cohesive in resin for layers between 50 and 400 um thick. Between 500 and 700 um, the failures were cohesive or mixed adhesive/cohesive, while the 1.4- and 2.7-mm layers always failed in a mixed adhesive/cohesive mode. For the resin composite tested, the contraction stress did not endanger the cohesive strength. It was concluded that if adhesion to tooth structure were improved, thinner adhesive joints might enhance the clinical success of luted restorations.

Key Words: resin composites • tensile strength • layer thickness

Journal of Dental Research, Vol. 74, No. 11, 1745-1748 (1995)
DOI: 10.1177/00220345950740110501
Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:


Home page
 CROBMHome page
S. Bouillaguet
BIOLOGICAL RISKS OF RESIN-BASED MATERIALS TO THE DENTIN-PULP COMPLEX
Critical Reviews in Oral Biology & Medicine, January 1, 2004; 15(1): 47 - 60.
[Abstract] [Full Text] [PDF]