Related Experiment Videos
Interfacial micromorphological differences in hybrid layer formation between water- and solvent-based dentin bonding
Geneviève L Gregoire1, Bernadette A Akon, Arlette Millas
1Biomaterials Laboratory, Faculty of Odontology, University of Toulouse III , Université Paul Sabatier, Toulouse, France. gregoire@cict.fr
The Journal of Prosthetic Dentistry
|July 20, 2002
Summary
Acetone-based dentin bonding systems create a superior, gap-free hybrid layer with excellent tag adhesion compared to water-based systems. This difference in micromorphology impacts the quality of the dental restoration interface.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Adhesive Dentistry
Background:
- Numerous dentin bonding systems with varying compositions and solvents exist.
- Comparative trials are needed to clarify their impact on interface quality.
Purpose of the Study:
- Investigate micromorphological differences in hybrid layer formation.
- Compare water-based and solvent-based dentin bonding products.
Main Methods:
- Examined five bonding systems (acetone-based, mixed-solvent, water-based) with compomers.
- Utilized optical microscopy and scanning electron microscopy on extracted teeth.
- Assessed interface quality based on void absence, hybrid layer uniformity, tubule opening, and tag adherence.
Main Results:
- Acetone-based systems produced continuous, gap-free hybrid layers with intimate dentin linkage and well-adhered tags.
- Water-based systems showed gaps in the hybrid layer and poor contact between resin tags and tubule walls.
- Optical and scanning electron microscopy provided complementary insights into interface morphology.
Conclusions:
- Acetone-based systems, when used with phosphoric acid etching, yield a continuous, thick hybrid layer with well-integrated tags.
- Water-based systems resulted in thinner hybrid layers and incompletely sealed dentinal tubules.