What Is Crown Lengthening? When the Best Smile Starts With the Gums

When people think about improving a smile, they usually think about the teeth.

Whiter teeth. Straighter teeth. Porcelain veneers. Dental crowns. Cosmetic bonding.

But sometimes the teeth are not really the problem.

The gums are hiding too much of them.

Crown lengthening is a dental procedure that reshapes gum tissue—and sometimes a small amount of supporting bone—to expose more of a natural tooth. It can be performed for cosmetic reasons, to make a tooth easier to restore, or to create the proper biological conditions for a crown or other dental restoration.

The name can be confusing because crown lengthening does not actually make the tooth itself grow longer. Instead, it changes how much of the tooth is visible or accessible above the gumline.

At her Henderson, Nevada practice, Marielaina Perrone, DDS considers crown lengthening part of a much larger question: where should the gumline be in relation to the teeth, lips, smile, and underlying bone?

“Sometimes patients believe their teeth are too short when they actually have beautiful teeth hidden beneath excess gum tissue. Before changing the teeth, I want to understand whether changing the gums would create the more natural result.”

— Marielaina Perrone, DDS

That distinction can completely change a treatment plan.

What Is Crown Lengthening?

Crown lengthening is a periodontal procedure used to expose additional tooth structure by repositioning the gumline.

Depending on the individual anatomy, treatment may involve:

• Removing or reshaping excess gum tissue
• Repositioning the gumline
• Reshaping a small amount of supporting bone
• A combination of gum and bone contouring

The goal depends on why the procedure is being performed.

For a cosmetic patient, crown lengthening may expose more of naturally short-looking teeth and create better proportions.

For a restorative patient, it may expose enough healthy tooth structure to allow a dentist to properly restore a tooth that is broken or decayed near or below the gumline.

Although the same procedure may be involved, these are very different treatment objectives.

Why Would Someone Need Crown Lengthening?

There are two major reasons:

Cosmetic crown lengthening

The objective is primarily to improve the appearance and proportions of the smile.

Functional or restorative crown lengthening

The objective is to provide adequate accessible tooth structure for a restoration and establish a maintainable relationship between the restoration and the surrounding periodontal tissues.

Some patients need both.

For example, a patient undergoing a smile makeover may have uneven gumlines, short-looking teeth, old crowns, and restorative problems simultaneously.

Cosmetic Crown Lengthening: When Teeth Look Too Short

One of the most common cosmetic reasons for crown lengthening is a smile in which the teeth appear unusually short or square.

But appearances can be misleading.

A tooth can look short for several different reasons:

• Excess gum tissue covers part of the enamel
• The gumline is positioned too low on the tooth
• The underlying bone is positioned close to the enamel
• Teeth have actually been shortened by wear
• The natural tooth anatomy is genuinely short
• Lip movement exposes more gum when smiling
• The upper jaw relationship contributes to a gummy smile

These conditions do not necessarily receive the same treatment.

That is why simply looking at a gummy smile and removing gum tissue is not always appropriate.

Crown Lengthening and the Gummy Smile

A gummy smile generally refers to excessive gingival display when smiling.

Crown lengthening can dramatically improve certain gummy smiles—but not all of them.

If excessive gum coverage is making otherwise normally proportioned teeth appear short, removing and repositioning tissue can reveal more enamel and create a more balanced tooth-to-gum relationship.

But excessive gingival display can also be related to:

• Lip movement
• Lip length
• Tooth position
• Jaw anatomy
• Altered passive eruption
• A combination of factors

Crown lengthening addresses the gum and supporting bone relationship around the teeth.

It does not change the length of the upper lip or reposition the upper jaw.

This makes diagnosis particularly important.

“A gummy smile is a description, not a diagnosis. Two patients can show the same amount of gum when they smile and need completely different treatment.”

— Dr. Marielaina Perrone, DDS

What Is Altered Passive Eruption?

To understand some cosmetic crown lengthening cases, it helps to understand how teeth emerge into the mouth.

As permanent teeth erupt, the gum tissues normally migrate to a position that exposes the anatomical crown of the tooth.

In some people, more gum tissue remains over the enamel than expected. This is commonly associated with what is called altered passive eruption.

The teeth may therefore appear:

• Short
• Square
• Small
• Uneven
• Disproportionate to the smile

The underlying teeth may actually have attractive natural dimensions.

Crown lengthening can expose more of that hidden enamel.

This is very different from trying to make genuinely worn-down teeth appear longer by simply removing gum tissue.

Crown Lengthening vs. Gum Contouring

These terms are sometimes used interchangeably online, but there can be an important difference.

Gum Contouring

Simple cosmetic gum contouring generally involves reshaping excess soft tissue.

For minor asymmetry or small amounts of excess gum tissue, soft-tissue contouring alone may be sufficient.

Crown Lengthening

Crown lengthening may involve both soft tissue and underlying bone.

If the bone is positioned too close to the desired new gumline, simply removing gum tissue may not create a stable result.

The tissue can rebound toward its previous position, or the new gumline may not maintain an appropriate relationship with the supporting tissues.

This is why evaluating the bone beneath the gum matters.

Why Does the Bone Matter?

This is one of the most important concepts in crown lengthening.

The gumline cannot be designed independently from the bone underneath it.

The periodontal tissues need adequate space to attach to and protect the tooth.

Historically, dentists often referred to this as biologic width. Contemporary periodontal terminology more commonly describes this area as the supracrestal tissue attachment.

Regardless of terminology, the principle is important:

A dental restoration should respect the tissues that naturally attach around the tooth.

If a crown margin or other restoration extends too deeply beneath the gum and encroaches on this attachment area, chronic inflammation may result.

Possible consequences include:

• Persistent bleeding
• Swollen gums
• Discomfort
• Difficulty cleaning
• Gum recession
• Periodontal pocketing
• Bone changes

Functional crown lengthening may create additional accessible tooth structure while establishing a healthier relationship between the future restoration and the supporting tissues.

Functional Crown Lengthening for a Broken Tooth

Imagine a molar that fractures close to the gumline.

There may still be enough tooth to save—but not enough healthy structure above the gumline to predictably support a crown.

Simply placing a crown farther beneath the gum is not always a good solution.

Crown lengthening may expose additional sound tooth structure.

This can allow the dentist to create a more favorable restorative margin and improve the ability of the final crown to retain and protect the tooth.

Crown Lengthening for Decay Below the Gumline

Deep decay can extend beneath the gumline.

Even after removing the decay, there may not be enough accessible healthy tooth structure to properly restore the tooth.

Crown lengthening can sometimes expose the affected area so it can be:

• Properly visualized
• Cleaned
• Prepared
• Isolated
• Restored

However, crown lengthening is not automatically the best solution for every deeply decayed tooth.

The dentist must consider whether the remaining tooth has a reasonable long-term prognosis.

Can Crown Lengthening Save a Tooth?

Sometimes it can be an important part of saving one.

But this is where treatment planning becomes more nuanced.

The question should not simply be:

“Can we expose enough tooth to put a crown on it?”

The better question is:

“Will the tooth still have a favorable biological, structural, and functional prognosis after we do?”

Removing bone around one tooth can affect:

• Crown-to-root ratio
• Periodontal support
• Furcation anatomy in molars
• Adjacent teeth
• Gum architecture
• Cosmetic appearance

In some situations, heroic efforts to save a severely damaged tooth may create a compromised result.

Extraction and replacement may ultimately offer a more predictable long-term solution.

“Saving a natural tooth is valuable, but only when the tooth we save is worth keeping. Crown lengthening should improve the restorative prognosis—not simply make it technically possible to place a crown.”

— Marielaina Perrone, DDS

Crown Lengthening Before Porcelain Veneers

Crown lengthening can also be an important part of cosmetic dentistry.

Consider a patient whose front teeth appear short and whose gumline is uneven.

If porcelain veneers are placed without first correcting excessive gum coverage, the veneers may need to be designed around unfavorable proportions.

The final smile could still look:

• Too short
• Too square
• Too gummy
• Asymmetrical

Correcting the gum architecture first can establish a better framework for the porcelain.

The veneers can then be designed around more natural tooth proportions.

In carefully selected cases, this can make the final result look considerably more natural.

Do You Always Need Veneers After Cosmetic Crown Lengthening?

No.

This is an important point.

If the teeth underneath the excess gum tissue already have:

• Attractive color
• Good alignment
• Healthy enamel
• Good shape

crown lengthening alone may provide the desired cosmetic improvement.

The newly exposed tooth structure is the patient’s own enamel.

There is no reason to automatically cover healthy teeth with porcelain simply because the gums were reshaped.

Other patients may still benefit from veneers because they also want to change:

• Tooth color
• Shape
• Alignment
• Symmetry
• Worn edges
• Spacing

The treatment should be individualized.

How Is Crown Lengthening Performed?

The exact procedure varies according to the goal and anatomy.

The area is typically numbed with local anesthetic.

If only soft tissue requires adjustment, treatment may involve carefully removing and sculpting excess gum tissue.

If bone must also be repositioned, the gum tissue is gently reflected to provide access to the underlying bone.

A controlled amount of bone may then be reshaped to create the desired relationship between:

Tooth → bone → gumline → future restoration

The gum tissue is then repositioned and sutured.

The goal is not simply to remove tissue.

It is to create a stable, maintainable periodontal architecture.

Does Crown Lengthening Hurt?

The procedure itself is performed with local anesthesia, so patients should not feel the surgical treatment being performed in the usual sense.

Afterward, some soreness, swelling, and tenderness are expected.

The experience varies depending on:

• Number of teeth treated
• Whether bone was reshaped
• Location of treatment
• Individual healing response
• Complexity of the procedure

Postoperative instructions may include recommendations regarding oral hygiene, diet, physical activity, and appropriate medication.

Most patients find recovery manageable, but crown lengthening is still a surgical procedure and should be treated accordingly.

What Is Recovery Like After Crown Lengthening?

Initial gum healing occurs over the first several weeks, but the tissues continue to mature beyond the point when they simply “feel better.”

Patients may temporarily notice:

• Tenderness
• Mild swelling
• Minor bleeding
• Increased tooth exposure
• Temperature sensitivity
• Changes in the appearance of the gumline

Keeping the area clean is important, but brushing and flossing instructions may be modified during early healing.

Patients should follow the specific postoperative recommendations provided by their dentist or periodontist.

Why Might You Have to Wait Before Getting a Final Crown or Veneers?

This is especially important in the cosmetic zone.

After crown lengthening, the gum tissues need time to heal and stabilize.

If a final porcelain restoration is placed too early and the gumline later changes position, the cosmetic result can be compromised.

Potential problems include:

• Uneven gum margins
• Exposed restoration margins
• Asymmetry
• Incorrect tooth proportions

The amount of healing time required depends on the procedure, location, tissue type, and restorative plan.

For a front-tooth smile makeover, patience can be particularly valuable.

The final porcelain should ideally be designed around a stable gumline. Not a gumline that is still healing.

Will the Teeth Look Longer After Crown Lengthening?

Yes. That is the purpose.

But “longer” does not necessarily mean unnaturally long.

Cosmetic crown lengthening is intended to reveal a more appropriate amount of the natural tooth.

The result should be judged in relation to:

• Tooth width
• Neighboring teeth
• Gum symmetry
• Lip position
• Facial proportions
• Smile line

Removing too little tissue may produce little improvement.

Removing too much can create teeth that appear excessively long or make the roots more vulnerable.

The procedure therefore involves both biological and aesthetic judgment.

Can the Gums Grow Back?

Some tissue rebound can occur during healing.

Whether the gumline remains stable depends partly on the relationship between the gum tissue and underlying bone.

If only soft tissue is removed when the bone position really required correction, the tissue may tend to migrate back toward its original relationship.

That is one reason proper diagnosis matters more than simply choosing a laser or another device to remove gum tissue.

The instrument does not determine the diagnosis.

Is Laser Gum Contouring the Same as Crown Lengthening?

Not necessarily.

Lasers can be useful tools for soft-tissue procedures.

But a laser does not change the underlying biology.

If a case requires bone recontouring, simply using a soft-tissue laser does not address that issue.

Patients should therefore be cautious about focusing too heavily on the technology used.

The more meaningful questions are:

• Why is the gumline where it is?
• Where is the underlying bone?
• How much tooth should be exposed?
• Will the new gum position be stable?
• Is the goal cosmetic, restorative, or both?

Technique follows diagnosis.

Are There Risks With Crown Lengthening?

Like any surgical procedure, crown lengthening has potential risks and tradeoffs.

These can include:

• Postoperative discomfort
• Swelling
• Bleeding
• Infection
• Gum recession
• Tooth sensitivity
• Root exposure
• Changes in tooth appearance
• Tissue rebound
• Cosmetic asymmetry
• Altered periodontal support

When bone is removed, it does not simply regenerate back to its original architecture as part of routine healing.

That is why treatment should be planned conservatively.

Who May Not Be a Good Candidate?

Crown lengthening may not be the best choice when:

• The tooth is structurally hopeless
• Too much periodontal support would need to be removed
• The root is too short
• The resulting crown-to-root relationship would be unfavorable
• Adjacent teeth would be compromised
• Active periodontal disease is uncontrolled
• The cosmetic problem originates primarily from the lip or jaw
• Another treatment offers a more predictable outcome

In restorative dentistry, sometimes extraction is preferable.

In cosmetic dentistry, sometimes orthodontics, lip-related treatment, or another approach makes more sense.

Good treatment planning includes knowing when not to perform a procedure.

Crown Lengthening vs. Orthodontic Extrusion

For certain teeth fractured or decayed beneath the gumline, crown lengthening is not the only option.

Orthodontic extrusion may sometimes be used to gradually move more tooth structure above the gumline.

This can be advantageous in selected situations because it may preserve supporting bone that would otherwise need to be removed.

However, orthodontic extrusion takes time and is not appropriate for every tooth.

The choice depends on:

• Root anatomy
• Tooth position
• Amount of remaining structure
• Bone levels
• Aesthetic demands
• Adjacent teeth
• Long-term restorative plan

This is another example of why there is rarely one universal solution.

How Much Does Crown Lengthening Cost?

The cost varies considerably because “crown lengthening” can describe very different procedures.

A minor soft-tissue correction around one tooth is not equivalent to surgical crown lengthening involving multiple teeth and bone reshaping.

Cost can depend on:

• Number of teeth treated
• Cosmetic vs. functional treatment
• Whether bone must be reshaped
• Surgical complexity
• Specialist involvement
• Geographic location
• Additional restorative treatment

Patients should also distinguish between the cost of crown lengthening itself and the cost of any subsequent crowns, veneers, or other restorations.

A personalized examination is necessary for a meaningful estimate.

How Long Do Crown Lengthening Results Last?

When properly diagnosed and performed, crown lengthening is intended to create a stable long-term change.

The underlying bone architecture is altered when osseous recontouring is part of the procedure.

However, the mouth continues to change throughout life.

Long-term stability is influenced by:

• Periodontal health
• Oral hygiene
• Smoking
• Tooth movement
• Restorative margins
• Gum thickness
• Aging
• Individual healing characteristics

Maintaining healthy gums remains essential after treatment.

Is Crown Lengthening Worth It?

For the right patient, crown lengthening can accomplish something that veneers, crowns, or whitening alone cannot:

It changes the frame around the teeth.

In cosmetic dentistry, that can transform an entire smile without necessarily changing every tooth.

In restorative dentistry, it can make the difference between a restoration that violates periodontal tissues and one that can be maintained more predictably.

But its value depends on diagnosis.

A procedure performed for the wrong reason can create unnecessary recession, sensitivity, or loss of supporting tissue.

Frequently Asked Questions About Crown Lengthening

Is crown lengthening cosmetic or medical?

It can be either. Cosmetic crown lengthening improves tooth and gum proportions. Functional crown lengthening exposes additional tooth structure so a damaged or decayed tooth can be properly restored.

Is crown lengthening permanent?

The goal is a stable long-term result. Some soft-tissue rebound can occur during healing, particularly depending on the underlying bone relationship and individual tissue response.

Can crown lengthening fix a gummy smile?

It can improve gummy smiles caused by excessive gum coverage or certain eruption patterns. Gummy smiles caused primarily by lip movement or skeletal anatomy may require a different approach.

Does crown lengthening remove bone?

Sometimes. Soft-tissue-only cases do not necessarily require bone removal. Other cases require carefully controlled bone reshaping to establish a stable gumline.

Will my teeth become sensitive?

Some patients experience temporary sensitivity because more tooth or root surface may be exposed.

Can I get veneers after crown lengthening?

Yes. Crown lengthening is sometimes performed before porcelain veneers to establish better tooth proportions and gum symmetry. Adequate healing should occur before final restorations are completed.

Do I need veneers after crown lengthening?

Not necessarily. If the natural teeth have good color, shape, and alignment, cosmetic crown lengthening alone may produce the desired result.

Can crown lengthening save a broken tooth?

Sometimes. It can expose additional healthy tooth structure so a crown or other restoration can be placed. The overall structural and periodontal prognosis must still be favorable.

Is laser gum contouring enough?

It may be for a true soft-tissue-only problem. If the underlying bone is too close to the desired gumline, soft-tissue removal alone may not provide the appropriate or stable result.

How long before I can receive my final crown or veneers?

Healing time varies depending on the procedure and location. Cosmetic cases often require additional time for the gumline to mature before final porcelain is completed.

Crown Lengthening in Henderson, NV: Sometimes the Gums Are the Missing Piece

Crown lengthening is a perfect example of why cosmetic and restorative dentistry should not focus exclusively on teeth.

The gums matter.

The bone underneath the gums matters.

The relationship between a restoration and those tissues matters.

And in cosmetic dentistry, the way the gumline frames the teeth can influence the appearance of the smile just as much as tooth color or porcelain.

For some patients, crown lengthening reveals natural enamel that was hidden beneath excess gum tissue.

For others, it creates the healthy tooth structure necessary to restore a badly damaged tooth.

And for certain smile makeovers, correcting the gum architecture before designing veneers or crowns can make the final dentistry more conservative and natural-looking.

At her Henderson, Nevada practice, Marielaina Perrone, DDS evaluates crown lengthening as part of the entire smile and restorative plan—not as an isolated procedure.

“The gumline is part of smile design. Sometimes the most conservative way to improve a smile isn’t to add more dentistry to the teeth. It’s to reveal the beautiful tooth structure that was already there.”

— Marielaina Perrone, DDS

Patients from Henderson, Green Valley, Anthem, Seven Hills, Inspirada, Las Vegas, Summerlin, and surrounding Southern Nevada communities can schedule a consultation to determine whether crown lengthening, gum contouring, restorative dentistry, orthodontics, or another approach is most appropriate.

About Marielaina Perrone

Dr. Marielaina Perrone, DDS, is a trusted cosmetic and family dentist in Henderson, NV, known for helping patients achieve healthy, beautiful smiles through personalized, compassionate care. With more than 20 years of clinical experience, she combines advanced dental expertise with an artistic eye to deliver exceptional results in porcelain veneers, dental implants, smile makeovers, periodontal therapy, Botox, dermal fillers, and facial aesthetic treatments.

A graduate with honors from Stony Brook University School of Dental Medicine, Dr. Perrone remains committed to lifelong learning and regularly pursues advanced continuing education in cosmetic dentistry, implant dentistry, and facial aesthetics. Her comprehensive approach focuses on enhancing oral health, facial harmony, and overall confidence through customized treatment plans tailored to each patient’s unique goals.

Dr. Perrone is passionate about patient education, preventive care, and building lasting relationships founded on trust, communication, and comfort. She believes every patient deserves individualized attention and treatment that supports both long-term health and a confident smile.

Proudly serving Henderson, Green Valley, Las Vegas, Summerlin, and surrounding communities, Dr. Perrone is dedicated to providing modern, patient-centered dentistry in a welcoming environment. Outside the office, she enjoys cooking, staying active, spending time with family, and participating in community activities throughout the Las Vegas Valley.

 

Reviewed for Clinical Accuracy

Every article published on drperrone.com is personally written or clinically reviewed by Marielaina Perrone, DDS to ensure it reflects current evidence-based dentistry, modern treatment recommendations, and her philosophy that beautiful smiles are created through personalized care, facial harmony, and long-term oral health.

Last Reviewed: July 2026