Glass Ceramic in Front and Rear Teeth; Metal-free crowns are made of reinforced porcelain. Although many things affect the appearance of crowns, the most important is their reaction to light. Natural teeth transmit light. As a result, depth and vitality appear in the tooth. Due to the translucent properties of metal-free porcelain crowns (full porcelain), their depth and vitality are higher, so that the closest results to the natural tooth are obtained. While full porcelains create an aesthetic very similar to the natural tooth structure as they pass the light, metal porcelains have a dullness and artificiality even if they are made very well.
For this reason, full porcelains are preferred especially in the front teeth. Metal supported porcelains give the appearance of a dark gap in some lights (disco, camera flash, etc.) as if they were not in the mouth. Full porcelains pass all kinds of light, just like natural teeth. Metal supported porcelains are mechanically adhered to the tooth. Full porcelains are attached to the tooth mechanically and chemically. Therefore, their adhesion is much higher than metal supports.
Since there is no metal in the substructure, there is no dark line at the crown-gum level. A more aesthetic appearance is provided. When the gum is pulled, full porcelains retain their aesthetic appearance, while metal porcelains create a bad image in the area where they merge with the tooth. The risk of allergy to some metals (nickel, etc.) used in the infrastructure is absent in full porcelains.
Full Metal Porcelain Crowns Without Metal Backing
Metal Supported Bridges are porcelain bridges made of reinforced porcelain. It is preferred especially in the front teeth due to its very good light transmittance.