Ceramic Polishing can be performed on ceramic surfaces of different materials to achieve a desired finish. Different ceramic materials produce different levels of surface roughness after polishing. Lithium disilicate and leucite-reinforced feldspathic ceramics, for example, are translucent ceramic materials with excellent mechanical and esthetic properties. They are suitable for veneering applications and single restorations.

Several polishing systems are available for ceramic surfaces, and the choice of the right one depends on the surface type of the ceramic. In this study, four systems with various levels of roughness were evaluated. Of these, Vita VM9 and e.max were considered to be the latest ceramic materials. The study concluded that each of these systems had different effects on surface roughness.

Used at a lower RPM

Ceramic Polishing is a highly efficient mass finishing process that involves multiple stages of processing. The workpiece is taken through different grades of ceramic polishing media, and then a cleaning process is performed to remove paint and other impurities. A high-quality ceramic polishing machine will also level the roughness of the underlying metal.

For better results, the Ceramic Polishing should be used at a lower RPM. High RPMs reduce polisher life and can result in excessive heat production. The best speed range is around 10,000-12,000 RPM. This speed range is recommended by the manufacturer. However, this can vary depending on the type of material being polished.

Similar to the glazed surface

The research found that polishing can improve the appearance of ceramic restorations by reducing the roughness on the glazed surface. The glazed surface of ceramic restorations often becomes rough due to improper contour correction and adjustment processes. Traditional methods for smoothing such areas have been to reglaze them. But the advent of new polishing systems has prompted interest in studies that compare polishing effects on the glazed surface. Combinations of these polishing systems produced smooth surfaces that were similar to the glazed surface.

While staining resistance between resin and glazed ceramic is unclear, different polishing techniques have been shown to reduce staining. In the study, glazed ceramic and resin-ceramic were immersed in different staining solutions for varying lengths of time. The results revealed that glazed ceramic materials exhibited higher staining resistance than their resin-ceramic counterparts.

Wide range of finishes

Electropolishing is less widely used than mechanical polishing. It uses principles of electrochemistry to remove microscopic layers of the base surface. This technique allows for a wide range of finishes. One of the advantages of electropolished materials is that they do not undergo compression and deformation as in traditional mechanical polishing.

High-efficiency Ceramic Polishing fluids have two main ingredients: a nano silica sol and a tensio-active agent. The nano silica sol component accounts for about 0.05%-40% of the total mass of the polishing fluid, while the tensio-active agent accounts for the remaining 99%.

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