A zirconia crown is a type of dental crown made from zirconium dioxide, a very durable ceramic material that offers excellent strength, longevity, and aesthetics. The process of making and placing a zirconia crown involves several steps
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Refractory porcelain veneers are a type of dental veneer made using a specific technique that involves the use of a refractory die. These veneers are crafted from porcelain and are used to improve the aesthetics of teeth by addressing issues like discoloration, chips, or misalignment. The process of making refractory porcelain veneers is quite intricate and differs from other veneer fabrication methods
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The grey line you're noticing around the edge of an older dental crown is likely due to the metal base of a porcelain-fused-to-metal (PFM) crown becoming exposed. PFM crowns consist of a metal substructure covered by a layer of porcelain. The grey line typically becomes visible over time for a few reasons, an older crown, a metal crown substructure, gum recession or decay.
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