When do you get a porcelain tooth, there are generally two types, one is when you are missing a tooth and then you have to set that tooth, this is when you can get three connected porcelain teeth. A single tooth out of the problem, then set a tooth, this time you need to do one. There are also some special points, such as the middle out of a gap, this gap is not big or small, you can set a tooth, make this tooth a little bit bigger, to close the gap. Another possibility is incisors, some individual teeth have a slight twist, discoloration, you can also do a braces to put it up.