What Is Crown Lengthening?
Crown lengthening is a surgical procedure that reshapes the gum tissue and underlying bone around a tooth. The goal is to expose more of the natural tooth so it can support a dental crown, bridge, or other restoration. Without enough exposed tooth structure, a crown cannot grip the tooth properly and is more likely to fail.
The procedure is performed by a periodontist, a dentist who specializes in the gums and bone that support your teeth. Your general dentist or prosthodontist will typically refer you to a periodontist when they determine there is not enough tooth above the gumline to work with.
Restorative Crown Lengthening
The most common reason for crown lengthening is restorative. When a tooth breaks at or below the gumline, or when decay extends deep beneath the gum tissue, your dentist may not have enough solid tooth structure to attach a crown. Crown lengthening creates the space needed.
This is sometimes called functional crown lengthening. It follows a principle in dentistry called biologic width, which is the minimum amount of gum tissue and bone that must surround a healthy tooth. Violating biologic width by placing a crown too close to the bone leads to chronic inflammation and eventual failure of the restoration.
Cosmetic Crown Lengthening (Gummy Smile Correction)
Some people have teeth that appear short because excess gum tissue covers a significant portion of the tooth surface. This is commonly called a gummy smile. Crown lengthening can reshape the gumline to reveal more of the natural tooth, creating a more balanced appearance.
Cosmetic crown lengthening often involves several teeth across the front of the mouth to create a symmetrical gumline. The periodontist carefully plans the amount of tissue to remove so the final result looks proportional and natural.
When Is Crown Lengthening Needed?
Crown lengthening is needed when there is not enough tooth structure above the gumline to support a restoration. Your dentist will assess whether the remaining tooth meets the minimum requirements for a successful crown.
- A tooth has broken off at or below the gumline and cannot hold a crown without exposing more structure.
- Deep decay extends beneath the gum tissue, and your dentist needs access to remove all the decay and place a filling or crown.
- A previous crown has come off repeatedly because there was too little tooth to grip.
- You have a gummy smile and want to improve the proportions of your teeth and gumline.
- Your dentist needs to access the root of a tooth for a procedure like a root canal on a severely broken tooth.
Alternatives to Crown Lengthening
Crown lengthening is not always the only option. In some cases, orthodontic extrusion (slowly pulling the tooth out of the bone with braces or a small appliance) can bring more tooth above the gumline without surgery. For a gummy smile, Botox injections to the upper lip can reduce gum exposure, though the effect is temporary.
If the tooth is too damaged to save even with crown lengthening, extraction followed by a dental implant or bridge may be the better path. Your periodontist will evaluate the tooth and surrounding bone to help you understand which options are realistic for your situation.
How Crown Lengthening Is Performed
Crown lengthening is an outpatient procedure performed in the periodontist's office. It typically takes 30 to 60 minutes, depending on how many teeth are involved and whether bone needs to be reshaped.
Before the Procedure
Your periodontist will take X-rays and examine the tooth and surrounding gums. If the procedure is being done to prepare for a crown, your general dentist may place a temporary crown first so the periodontist can see exactly where the gumline needs to be.
You will discuss your medical history and any medications you take. Blood thinners and certain supplements may need to be adjusted before surgery. Your periodontist will give you specific instructions.
During the Procedure
The area is numbed with local anesthesia. Sedation is available for patients who are anxious, but most people tolerate the procedure well with numbing alone.
The periodontist makes small incisions in the gum tissue to create a flap, then gently lifts the gum away from the tooth and bone. Excess gum tissue is removed. If bone removal is needed, the periodontist uses specialized instruments to carefully reshape the bone around the tooth. The gums are then repositioned at the new, lower level and stitched into place.
A periodontal dressing (a putty-like bandage) may be placed over the surgical site to protect it during the first week of healing.
Immediately After
You will leave the office with gauze over the area and detailed aftercare instructions. The anesthesia wears off within a few hours. Most patients manage discomfort with over-the-counter pain medication such as ibuprofen. Your periodontist may also prescribe a medicated mouth rinse to keep the area clean.
Recovery Timeline and Aftercare
Recovery from crown lengthening is typically straightforward, but healing takes time. You will need to wait for the gums to fully heal before your dentist can place the permanent crown or restoration.
Days 1 Through 7
Swelling peaks around day 2 or 3, then gradually improves. Some bruising is normal. Apply ice packs in 20-minute intervals for the first 48 hours to reduce swelling. Eat soft foods and avoid chewing near the surgical area. Do not brush or floss the treated area until your periodontist says it is safe, usually at the one-week follow-up visit.
Weeks 2 Through 4
Stitches are removed at 7 to 14 days. The gums begin to firm up and the tissue starts to mature. You can gradually return to normal eating, but continue to avoid hard or crunchy foods directly on the area. Sensitivity to hot and cold is common during this phase because more tooth root is now exposed.
Weeks 4 Through 6 and Beyond
Most periodontists ask patients to wait at least 6 weeks, and sometimes up to 3 months, before the final crown is placed. This allows the tissue to stabilize at its new position. Placing a crown too soon can result in a poor fit if the gumline continues to shift during healing.
Once the tissue has fully healed, your general dentist or prosthodontist will take new impressions and fabricate the permanent crown.
Crown Lengthening Cost and Insurance
Crown lengthening typically costs between $1,000 and $3,000 per tooth. The total depends on the number of teeth treated, whether bone removal is required, your geographic location, and the periodontist's experience. Cosmetic crown lengthening across multiple front teeth will cost more than functional lengthening on a single tooth.
Dental insurance often covers crown lengthening when it is medically necessary to restore a tooth. The procedure is billed under periodontal surgery codes, and most plans cover 50% to 80% of the cost after your deductible. Cosmetic crown lengthening is generally not covered by insurance.
If you do not have insurance or your plan does not cover the full amount, ask about payment plans. Many periodontal offices offer financing through third-party providers like CareCredit. Costs vary by location and provider.
Risks and Potential Complications
Crown lengthening is a common and generally safe procedure, but like any surgery, it carries some risks.
- Infection at the surgical site, though this is uncommon when aftercare instructions are followed.
- Prolonged sensitivity to temperature changes because more root surface is exposed after the procedure.
- Uneven gumline if tissue heals asymmetrically, which may require a minor touch-up procedure.
- Tooth may appear longer than neighboring teeth, especially after functional crown lengthening on a single tooth.
- In rare cases, bone removal may weaken the support structure of adjacent teeth.
When to Call Your Periodontist
Contact your periodontist if you experience heavy bleeding that does not stop with gentle pressure, a fever above 101 degrees, increasing pain after the first 3 days instead of improving, or pus or a foul taste from the surgical area. These may indicate an infection or complication that needs prompt treatment.
Who Performs Crown Lengthening?
Crown lengthening is performed by a periodontist, a dentist who has completed 3 additional years of residency training in the treatment of gums, bone, and supporting structures of the teeth. Some general dentists with advanced surgical training also perform the procedure, but periodontists handle the majority of cases, particularly when bone reshaping is involved.
If your general dentist recommends crown lengthening, ask for a referral to a periodontist. For cosmetic cases, it is especially important to choose a periodontist with experience in esthetic gum surgery, as the results are highly visible.
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