HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by El Zohairy, A.A. Articles by Feilzer, A.J. Search for Related Content PubMed PubMed Citation Articles by El Zohairy, A.A. Articles by Feilzer, A.J.

The Influence of Specimen Attachment and Dimension on Microtensile Strength

¹ Department of Dental Materials Science and
² Department of Functional Anatomy, Academic Center for Dentistry Amsterdam (ACTA), Louwesweg 1, 1066 EA Amsterdam, the Netherlands;

^* corresponding author, a.degee{at}acta.nl

The higher microtensile bond strength values found for specimens with a smaller cross-sectional area are often explained by the lower occurrence of internal defects and surface flaws. We hypothesized that this aberrant behavior is mainly caused by the lateral way of attachment of the specimens to the testing device, which makes the strength dependent on the thickness. This study showed that composite bars of 1x1x10, 1x2x10, and 1x3x10mm attached at their 1-mm-wide side (situation A) fractured at loads of the same magnitude, as a result of which the microtensile strength (µTS), calculated as F/A (force at fracture/cross-sectional area), significantly increased for specimens with decreasing thickness. Attachment at the 1-, 2-, or 3-mm-wide side (situation B) resulted in equal µTS values (P > 0.05). Finite element analysis showed different stress patterns for situation A, but comparable patterns for situation B. Both situations showed the same maximum stress at fracture.

KEY WORDS: finite element analysis • microtensile bond strength • microtensile strength • composite

This article has been cited by other articles:

				C.J. Soares, P.V. Soares, P.C.F. Santos-Filho, and S.R. Armstrong Microtensile Specimen Attachment and Shape Finite Element Analysis J. Dent. Res., January 1, 2008; 87(1): 89 - 93. [Abstract] [Full Text] [PDF]