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Effect of solvent and rewetting time on dentin adhesion.
1Division of Operative Dentistry, Department of Restorative Sciences, Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, Minneapolis, USA. perdi001@umn.edu
Quintessence International (Berlin, Germany : 1985)
|July 11, 2001
Summary
Dentin adhesive bond strengths are affected by the solvent type and rewetting duration. Proper rewetting is crucial for optimal microtensile bond strengths of dental adhesives.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials Engineering
Background:
- Dentin bonding is a critical aspect of restorative dentistry.
- The integrity of the dentin-adhesive interface influences the longevity of dental restorations.
- Understanding factors affecting bond strength is essential for clinical success.
Purpose of the Study:
- To evaluate the impact of solvent composition and rewetting time on the microtensile dentin bond strengths of four different total-etch dentin adhesives.
- To compare the performance of water-based, ethanol-based, and acetone-based dentin adhesives under varying moisture conditions.
Main Methods:
- An in vitro study utilizing sixty human molar specimens.
- Four total-etch dentin adhesives (EBS Multi, Excite, Prime & Bond NT, Single Bond) were tested.
- Specimens were subjected to five different dentin moisture conditions and tested in tensile mode.
Main Results:
- Bond strengths varied significantly based on solvent and rewetting time.
- Acetone-based (Prime & Bond NT) and ethanol-based (Excite) adhesives showed reduced bond strength when dentin was dried for 15 seconds.
- Water-based (EBS Multi) and ethanol/water-based (Single Bond) adhesives demonstrated improved bond strength with rewetting times of 30 seconds.
Conclusions:
- The solvent type within a dentin adhesive system critically influences bond strength.
- Adequate rewetting time is essential for achieving optimal and consistent microtensile bond strengths.
- Clinical protocols should consider dentin moisture management for improved adhesive performance.