Crown lengthening is done using local anesthesia. How long it takes will depend on the number of teeth that need treatment. Even if only one tooth is involved, crown lengthening typically includes neighboring teeth, too. That allows the tissues to be reshaped gradually. If both bone and soft tissue are removed, the procedure will take longer than if only soft tissue is removed.
The periodontist will make cuts that will pull the gums away from the teeth. This will expose the roots of the teeth and the surrounding bone. In some cases, simply removing a little gum tissue will expose enough tooth for your dentist to place a crown or filling. However, in most cases, the periodontist will need to remove some bone from around the roots of the teeth. Once the periodontist has exposed enough tooth, the surgical area will be washed with sterile salt water and the gums will be stitched together. Some dentists put a bandage over the stitches.
If you have temporary crowns on any of the involved teeth, the crowns may be removed before the procedure begins. The periodontist will put them back afterward.