First of all, the edge of the crown under the gums is a helpless move, because the current technology is impossible to achieve a truly close fit, that is, the edge of the porcelain and the tooth where the contact is bound to have a gap, if in the front teeth, will affect the aesthetic, in order to be aesthetically pleasing to have to hide in the gums below.

Theoretically you shouldn't be able to pick at the crown edge, but in practice you can't, it's the same as a door and a doorframe. No matter how close the fit is, no matter what size it is, no matter how well it is made, no matter what material it is made of, you can still see or feel the edge of the door in relation to the frame.

Why do you need to make the edge of the crown on the gums, this is because all the body parts only require one thing in order to be healthy, is clean, the exposed contact part can be done to clean, hidden contact points will be very easy to hide dirt, the back of the refrigerator in your home and the front of the refrigerator cleanliness of the comparison can be seen.

So, for the back teeth, we recommend that the crowns be placed above the gums. This is easy to clean, front teeth, you worry about what are the problems, naturally, is the cleaning problem. In fact, this is a lot of people wear porcelain crowns after the main problem, is the gum problem, can only be recommended to pay more attention to cleaning, such as to develop a habit of cleaning immediately after eating, of course, this habit is difficult to adhere to. As long as you stick to it, there is no problem.