Dentin regional bond strength of self-etch and total-etch adhesive systems

Abstract Objectives To evaluate the microtensile bond strength (MTBS) of self-etch (with or without H3 PO4 -etching) and total-etch bonding systems bonded to different regions of dentin. Methods Long flat dentin cavity preparations extending from top-crown to root-apex within the same tooth were per...

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Bibliographic Details
Published in:Dental materials 2007-12, Vol.23 (12), p.1542-1548
Main Authors: Proença, Jatyr P, Polido, Mário, Osorio, Estrella, Erhardt, Maria Carolina G, Aguilera, Fátima S, García-Godoy, Franklin, Osorio, Raquel, Toledano, Manuel
Format: Article
Language:English
Subjects:
Acid Etching, Dental - methods
Adhesion
Advanced Basic Science
Bond strength
Dental Bonding
Dental Stress Analysis
Dentin
Dentin regions
Dentin-Bonding Agents
Dentistry
Humans
Materials Testing
Molar, Third
Phosphoric Acids
Resin Cements
Self-etch
Surface Properties
Tensile Strength
Tooth Cervix
Tooth Crown
Tooth Root
Total-etch
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Summary:Abstract Objectives To evaluate the microtensile bond strength (MTBS) of self-etch (with or without H3 PO4 -etching) and total-etch bonding systems bonded to different regions of dentin. Methods Long flat dentin cavity preparations extending from top-crown to root-apex within the same tooth were performed and bonded: using two-step (Clearfil SE Bond/SEB, Resulcin Aqua Prime/RES) and one-step (Etch & Prime 3.0/EP, One-Up Bond F/OUB, Prompt L-Pop/PLP, Solist/SOL and Futurabond/FUT) self-etch adhesives; these same adhesives were also applied following H3 PO4 -etching of dentin and finally two more groups were bonded with total-etch adhesives (Single Bond/SB and Prime & Bond NT/PBNT). Build-ups of resin composite were constructed incrementally to ensure sufficient bulk for the MTBS test and the different regions of dentin were identified by painting with different colours on the top of the resin composite. Specimens were sliced into beams and tested in tension. ANOVA and multiple comparisons tests were used ( p < 0.05). Results Regardless of the tested dentin region, SEB attained the highest MTBS to smear layer-covered surfaces ( i.e., coronal dentin: 42.7 MPa), while H3 PO4 -etching of dentin hampered bonds ( i.e., coronal dentin: 27.7 MPa). When bonding with PBNT, SB, RES, EP, PLP, SOL and FUT, MTBS was similar for different dentin regions. H3 PO4 -etching of dentin did not alter the attained MTBS. Significance SEB yielded the highest MTBS to all regions of dentin. When bonding to parallel-cut dentin, previous H3 PO4 -etching of dentin did not increase MTBS and differences in bond strength among dentin regions were absent.
ISSN:0109-5641
1879-0097
DOI:10.1016/j.dental.2007.02.001