Crown lengthening is a procedure used to increase the amount of tooth which is above the gum line. Crown lengthening may be needed when a tooth breaks below the gum line, or when the soft tissue covering teeth has not receded properly during the eruption process.
Before veneers or crowns can be placed on the teeth, the gum surrounding the tooth is reshaped to expose more of the natural tooth, thus enabling restorative or cosmetic dental procedures.
When crown lengthening is performed, some bone and gum tissue is removed around each tooth, so that there is more tooth structure remaining above the gum line.
The before and after photos below show how crown lengthening elongates the teeth for a nicer smile and a more aesthetic appearance.