All-porcelain crowns allow us the ability to provide a very strong structure for tooth replacement and the optical characteristics of all-porcelain provide the most esthetic crown restoration that can be achieved. All-porcelain crowns are utilized when insufficient tooth structure remains to use a more conservative procedure such as a laminate veneer. Current technology is available to allow us to place the crowns and obtain a very realistic color transition with gum tissue and eliminate unsightly black lines or black triangles at the gumline. The benefits of many of the all-porcelain techniques now utilized allow us to achieve a smooth color transition between crown margins and tooth structures. In the event of minor tissue recession or change over time a dark black unsightly line is never visible.