Color Change of Lithium Disilicate Crowns Clinical Trial
Official title:
Clinical Assessment of Color Stability and Patient Satisfaction for Polished Versus Glazed Lithium Disilicate Glass Ceramic Restorations and Patient Satisfaction
Dental overglaze is consist of colorless glass powder and applied to the fired crown surface to provide a glossy surface,Adjustment procedure break the production of the glaze layer through a natural glaze or overglaze process and create a rough surface, glazing or polishing after adjustment procedures is important to enhance the appearance of the restoration
Dental overglaze is consist of colorless glass powder and applied to the fired crown surface
to provide a glossy surface. Natural glaze is a vitrified layer that is formed on the surface
of the porcelain containing a glass phase when the porcelain is heated to a glazing
temperature for a specific time, Adjustment procedure break the production of the glaze layer
through a natural glaze or overglaze process and create a rough surface, The color of
porcelain restorations is affected by surface roughness because rough surface reflects light
irregularly and less than a glazed surface . Therefore, glazing or polishing after adjustment
procedures is important to enhance the appearance of the restoration .
Although glazed surfaces appeared whiter, the CIE L* value measured with the specular
component excluded (SCE) geometry was lower than that of polished surfaces (28).Several
reports have investigated different polishing techniques that support the use of polishing as
an alternative for glazing of ceramic restorations .
Polishing can reduce chair time, eliminates laboratory procedures, infection control may be
obtained . Polishing is also important for the porcelain surface for esthetic so several
different techniques have been described for repolishing porcelain surfaces in the mouth .
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