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Analysis of dental adhesive systems using scanning electron microscopy
1Department of Operative Dentistry, University of North Carolina, Chapel Hill 27599-7450.
International Dental Journal
|August 1, 1994
Summary
Scanning electron microscopy revealed how acid conditioners affect dentine surfaces, with some leaving residue. Five dentine bonding systems were tested, with four forming robust interfaces on moist dentine.
Area of Science:
- Dental Materials Science
- Surface Chemistry
- Biomaterials Engineering
Background:
- Effective dentine bonding is crucial for durable dental restorations.
- The smear layer and dentinal tubules significantly influence adhesion.
- New dentine bonding systems aim to improve interfacial integrity.
Purpose of the Study:
- To evaluate the impact of acid conditioners on dentine surface morphology.
- To assess the performance of five new-generation dentine bonding systems.
- To characterize the resin-dentine interface formed by these systems.
Main Methods:
- Scanning electron microscopy (SEM) was employed to examine dentine surfaces.
- Various acid conditioners (etchants) were applied to dentine.
- Five specific dentine bonding systems were tested on visibly moist dentine.
Main Results:
- Acid conditioners effectively removed the smear layer and opened dentinal tubules.
- Some conditioners left residual debris or reaction products on the dentine surface.
- Four of the five bonding systems (All-Bond 2, Amalgambond, OptiBond, Scotchbond Multi-Purpose) formed acid-resistant hybrid layers and resin tags.
Conclusions:
- The choice of acid conditioner impacts dentine surface preparation.
- Certain new-generation dentine bonding systems demonstrate effective interfacial bonding on moist dentine.
- Formation of hybrid layers and resin tags is indicative of strong resin-dentine adhesion.