Fatigue resistance of dentin bonds prepared with two- vs. three-step adhesives: Effect of carbodiimide

Zihou Zhang; Dylan Beitzel; Hessam Majd; Mustafa Mutluay; Arzu Tezvergil-Mutluay; Franklin R Tay; David H Pashley; Dwayne Arola

doi:10.1016/j.dental.2017.08.192

Fatigue resistance of dentin bonds prepared with two- vs. three-step adhesives: Effect of carbodiimide

Dent Mater. 2017 Dec;33(12):1340-1350. doi: 10.1016/j.dental.2017.08.192. Epub 2017 Sep 21.

Authors

Zihou Zhang¹, Dylan Beitzel¹, Hessam Majd¹, Mustafa Mutluay², Arzu Tezvergil-Mutluay², Franklin R Tay³, David H Pashley⁴, Dwayne Arola⁵

Affiliations

¹ Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore, MD, USA.
² Adhesive Dentistry Research Group, Department of Cariology, Institute of Dentistry, University of Turku, Turku, Finland.
³ Department of Oral Biology, The Dental College of Georgia, Augusta University, Augusta, GA, USA; Department of Endodontics, The Dental College of Georgia, Augusta University, Augusta, GA, USA.
⁴ Department of Oral Biology, The Dental College of Georgia, Augusta University, Augusta, GA, USA.
⁵ Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA; Departments of Oral Health Sciences and Restorative Dentistry, School of Dentistry, University of Washington, Seattle, WA USA. Electronic address: darola@uw.edu.

Abstract

The application of a cross-linker to demineralized dentin is reportedly effective at extending the durability of dentin bonds.

Objective: To compare the effect of a cross-linker pretreatment on the fatigue crack growth resistance of resin-dentin bonds prepared with a two- vs. three-step adhesive system.

Methods: Bonded interface Compact Tension (CT) specimens were prepared using commercial two- and three-step etch-and-rinse adhesives and compatible hybrid resin-composite. For the treated groups, adhesive bonding was preceded by a 1min application of an experimental carbodiimide (EDC) conditioner to the acid-etched dentin. The control groups received no such treatment. The fatigue crack growth resistance was examined after storage in artificial saliva at 37°C for 0, 3 and 6 months.

Results: There was no significant difference in the immediate fatigue crack growth resistance the control and EDC-treated groups at 0 months for either adhesive system. After 3 and 6 months of storage, the EDC-treated groups exhibited significantly greater (p≤0.05) fatigue crack growth resistance than the controls. Although the EDC treatment was equally effective in deterring degradation for both adhesives, bonds prepared with the three-step system exhibited the lowest resistance to fatigue crack growth overall.

Significance: An EDC treatment applied during dentin bonding could help maintain the durability of bonds prepared with two or three-step adhesive bonding systems.

Keywords: Collagen; Cross-linker; Dentin bonding agents; Durability; EDC; Endogenous proteinases; Fatigue crack growth; Fracture.

Publication types

Comparative Study
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Acid Etching, Dental
Carbodiimides / chemistry*
Composite Resins / chemistry*
Cross-Linking Reagents / chemistry*
Dental Bonding*
Dental Restoration Failure*
Dental Stress Analysis
Dentin-Bonding Agents / chemistry*
Materials Testing
Microscopy, Electron, Scanning
Saliva, Artificial
Surface Properties
Tensile Strength

Substances

Carbodiimides
Composite Resins
Cross-Linking Reagents
Dentin-Bonding Agents
Saliva, Artificial

Grants and funding

R01 DE015306/DE/NIDCR NIH HHS/United States