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Evaluation of the Syntac bonding system
D H Retief1, R S Mandras, C M Russell
1Department of Biomaterials, University of Alabama School of Dentistry, University Station, Birmingham 35294.
American Journal of Dentistry
|February 1, 1993
Summary
This study found that Syntac bonding system shows significantly higher shear bond strength to dentin after 24-hour storage compared to immediate testing. Resin penetration into dentin tubules was also observed.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials Research
Background:
- Dental adhesives are crucial for restoring tooth structure.
- Evaluating the long-term stability and efficacy of adhesive systems is essential.
- Syntac is a widely used dentin bonding system.
Purpose of the Study:
- To assess the shear bond strength (SBS) of Syntac to dentin.
- To quantify microleakage (ML) in Class V restorations using Syntac.
- To examine resin penetration into dentin tubules via SEM.
Main Methods:
- In vitro study on extracted human molars and premolars.
- Syntac Primer and Adhesive applied to prepared dentin surfaces.
- Class V cavities restored with Radiopaque Heliomolar, tested at different time points (immediate and 24-hour storage).
- Shear bond strength measured in MPa; microleakage quantified using a spectrophotometric dye recovery method.
Main Results:
- Mean SBS (MPa) after 1 minute: 10.14 ± 2.80; after 24 hours: 15.90 ± 2.13.
- Mean microleakage: 2.57 ± 0.97 μg dye/restoration.
- SBS after 24-hour storage was significantly higher than immediate SBS (P < 0.0001).
- Scanning Electron Microscopy (SEM) revealed deep resin penetration into dentin tubules.
Conclusions:
- Syntac demonstrates improved shear bond strength to dentin after a 24-hour hydration period.
- The Syntac system effectively seals Class V preparations, minimizing microleakage.
- Deep resin penetration into dentin tubules suggests good integration with the dentin substrate.