Placing margins below the gum can be unhealthy and makes adhesive dentistry unpredictable. Efficient marginal blending is possible with translucent porcelain and good management of tooth color. With dark or discolored teeth, a common approach is to cover them with opacious porcelain and place margins subgingivally, with many disadvantages. Dr. Jose-Luis Ruiz, of Burbank, Calif, discusses the use of bleaching and internal bleaching for these types of procedures, outlining all the steps involved.
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