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Evaluation of surface roughness and polishing techniques for new ceramic materials
1Harvard School of Dental Medicine, Boston, Mass.
The Journal of Prosthetic Dentistry
|May 1, 1989
Summary
Minimizing surface roughness in dental crown materials like Dicor and Cerestore is crucial for biocompatibility. Polishing attempts often increased roughness, with glazed veneers providing the smoothest finish.
Area of Science:
- Dental Materials Science
- Biocompatibility Research
- Surface Engineering
Background:
- Surface roughness of dental prosthetics impacts biocompatibility and clinical success.
- All-ceramic materials are increasingly used for crowns and bridges.
- Achieving smooth surfaces on these materials is a significant challenge.
Purpose of the Study:
- To evaluate the effect of polishing on the surface roughness of Dicor and Cerestore all-ceramic materials.
- To compare the surface characteristics of polished all-ceramic materials with controls.
- To determine the optimal finishing method for these dental ceramics.
Main Methods:
- Scanning electron microscopy (SEM) was employed for surface analysis.
- Two all-ceramic crown materials, Dicor and Cerestore, were investigated.
- Polishing procedures were applied, and surfaces were compared to unpolished and glazed controls.
Main Results:
- Unpolished Dicor and Cerestore exhibited rough surfaces.
- Polishing Cerestore significantly increased its roughness.
- Dicor finishing resulted in a smoother but pitted surface; both were rougher than glazed controls.
- The smoothest surfaces were achieved with glazed veneers (Cerestore) and shading porcelain (Dicor).
Conclusions:
- Standard polishing techniques are often detrimental to the surface integrity of Dicor and Cerestore.
- Glazed porcelain application offers the most effective method for achieving a smooth surface finish on these all-ceramic materials.
- Surface smoothness is critical for optimal biocompatibility in dental restorations.