In most cases, it is not actually that the tooth is too short. The teeth appear short, because there is too much gum tissue covering them. To correct this the extra tissue is removed, and the gum tissue is reshaped to an ideal position. This results in a beautiful and proportional smile.
Sometimes, not enough of the tooth sticks out above the gum to support a filling or crown. Functional Crown Lengthening is the removal of the excess tissue to expose more of the natural tooth. This results in a better fitting crown and/or filling that will be easy to clean, have the right shape, size, and longevity.