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Bonding of resin to dentin. Interactions between materials, substrate and operators
1Department of Oral Biochemistry, Sahlgrenska Academy at Göteborg University. thomas.jacobsen@dental.pp.se
Swedish Dental Journal. Supplement
|October 17, 2003
Summary
This study found that while in vitro testing predicts in vivo outcomes, water-based primers and simplified adhesives reduce technique sensitivity in resin-dentin bonding. Operator variability significantly impacts gap formation.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Adhesive Dentistry
Background:
- Understanding factors influencing resin-dentin bonding is crucial for durable dental restorations.
- Operator variability and material properties significantly affect clinical outcomes.
Purpose of the Study:
- To identify and study factors affecting resin-dentin bonding, including operator influence.
- To compare in vivo and in vitro bonding site morphology.
- To evaluate the impact of different primers and demineralization levels on bond strength.
Main Methods:
- Scanning Electron Microscopy (SEM) for morphological analysis.
- Fourier Transform Infrared Spectroscopy (FTIR) to assess polymerization.
- Atomic Absorption Spectroscopy (AAS) for calcium leaching.
- Confocal microscopy for gap formation analysis.
Main Results:
- In vitro and in vivo bonding sites showed similar morphology.
- Water-based primers exhibited less technique sensitivity than acetone-based primers.
- Water may interfere with resin polymerization; calcium leaching is predictable but not correlated with bond strength.
- Gap formation is operator-dependent; simplified adhesives reduce variability.
Conclusions:
- In vitro bond testing can predict in vivo results.
- Solvent choice influences bonding agent performance and technique sensitivity.
- Water rinse time post-etching is critical; simplified systems offer reduced operator variability.