This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Shiau, J.Y. Articles by Wolf, G.R. Search for Related Content PubMed PubMed Citation Articles by Shiau, J.Y. Articles by Wolf, G.R. Social Bookmarking                         What's this?

Analysis of the "Shear" Bond Strength of Pretreated Aged Composites Used in Some Indirect Bonding Techniques

7990 Hollow Mesa Court, San Diego, California 92126

S.T. Rasmussen

2401 Euclid Heights, Cleveland Heights, Ohio 44106

A.E. Phelps

Department of Orthodontics, School of Dentistry, Case Western Reserve University, Cleveland, Ohio 44106

D.H. Enlow

Department of Orthodontics, School of Dentistry, Case Western Reserve University, Cleveland, Ohio 44106

G.R. Wolf

Department of Orthodontics, School of Dentistry, Case Western Reserve University, Cleveland, Ohio 44106

Investigations of the repair of composites have shown that bond strengths can be significantly reduced at an interface involving an aged composite. Brackets placed by some indirect bonding techniques also have an interface involving an aged composite. This study investigated some of the properties of sealant-composite interfaces and parameters affecting these properties independent of other regions and interfaces found in the total enamel-sealant-composite-bracket system using a shear bond-strength test and fractographic analysis. The effects of various pretreatments of 7-day-old composite surfaces on the bond strength and contact angle of a mixed sealant on these pretreated surfaces were determined. Fractured specimens with adhesive failure closest to the point of force application had low bond strengths (17.62 MPa), which could be correlated with surface pretreatment. Preliminary tests showed that acetone pretreatment produced the most consistently strong interfaces with the fewest adhesive failures of this type. Specimens with adhesive failure only in other regions had higher bond strengths (23.41 MPa), which showed no dependence on pretreatment. There was no statistical relationship between contact angle and bond strength. The data coupled with fracture path analysis suggest that: first, the critical region for fracture analysis is that part of the adhesive interface which is closest to the point of force application; second, failure during some dental shear bond strength tests probably occurs as a consequence of tensile stress induced by a bending moment rather than by shear stress; and third, specifying bond strength as breaking load/area may he incorrect.

Journal of Dental Research, Vol. 72, No. 9, 1291-1297 (1993)
DOI: 10.1177/00220345930720090601


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				B. Wendl, H. Droschl, and P. Muchitsch Indirect bonding--a new transfer method Eur J Orthod, February 1, 2008; 30(1): 100 - 107. [Abstract] [Full Text] [PDF]

				A. Della Bona and R. van Noort Shear vs. Tensile Bond Strength of Resin Composite Bonded to Ceramic Journal of Dental Research, September 1, 1995; 74(9): 1591 - 1596. [Abstract] [PDF]