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[Surface structures and substance loss during the etching of ceramic materials]
Schweizer Monatsschrift Fur Zahnmedizin = Revue Mensuelle Suisse D'Odonto-Stomatologie = Rivista Mensile Svizzera Di Odontologia E Stomatologia
|January 1, 1989
Summary
This study analyzed ceramic surface etching for dental prosthetics. Optimal etching involves 1 minute with specific solutions, avoiding hydrofluoric acid to prevent material loss.
Area of Science:
- Dental Materials Science
- Prosthetic Dentistry
- Surface Morphology Analysis
Background:
- Advancements in all-ceramic dental systems necessitate understanding material-specific properties.
- Surface preparation is crucial for prosthetic bonding and longevity.
Purpose of the Study:
- To evaluate the surface morphology of various dental ceramics after etching.
- To compare the effects of different etching solutions and times on ceramic surfaces.
- To determine optimal etching parameters for prosthetic applications.
Main Methods:
- Scanning Electron Microscopy (SEM) was used to examine ceramic surface morphology.
- Five ceramic materials (Mirage, Dicor, Optec, Vitadur N, Ceramco II) were etched.
- Etching was performed using Super-Etch, Stripit, 40% hydrofluoric acid, and Dicor retention gel for 1-4 minutes.
Main Results:
- Most ceramics exhibited similar surface structures irrespective of etching solution or time, except for Dicor.
- Dicor's surface pattern varied with etching duration.
- An etching time of 1 minute with Super-Etch, Stripit, or Dicor retention gel resulted in minimal material loss (1.6 microns).
- 40% hydrofluoric acid caused significant material loss and is not recommended.
Conclusions:
- Optimal etching for most dental ceramics involves 1 minute with specific agents, minimizing material degradation.
- Hydrofluoric acid (40%) should be avoided due to excessive material loss.
- Etched ceramic surfaces and enamel show well-filled microretentions suitable for composite cements.