How Long Do Dental Crowns Last and What Makes Them Fail Sooner?

Most dental crowns last approximately 5–15 years, while some remain functional considerably longer with appropriate care. Crown material matters, but longevity also depends on the remaining natural tooth, crown margin, bite forces, oral hygiene, and habits such as grinding or chewing ice.1

A crown does not necessarily fail because its surface has worn out. Problems can develop in the crown, the cemented connection, the margin where the restoration meets the tooth, or the natural tooth underneath.

This guide compares the available materials, explains why crowns require repair or replacement, and identifies changes that warrant a dental examination.

How Long Each Type of Dental Crown Lasts

Crown longevity is often expressed as the percentage of restorations still functioning after a specific follow-up period rather than as a fixed lifespan for each material.2

Five-year survival estimates are approximately 90.7% for all-ceramic single crowns and 94.7% for metal-ceramic crowns, although outcomes vary among materials, crown designs, tooth positions, and patient groups.2

This means broad estimates such as 5–15 years are useful for general context, but a material-specific promise such as “zirconia lasts exactly 15 years” is not clinically defensible.1 2

Encino Dental Esthetics offers several dental crown options based on the restorative and aesthetic needs of the tooth.

These figures should not be treated as a direct head-to-head ranking for an individual patient. Survival can vary substantially even within the same material category.2

All-Ceramic and Porcelain Crowns

All-ceramic crowns contain no metal framework. This category includes several materials with different strength, translucency, and clinical indications rather than one uniform type of “porcelain.”

Lithium disilicate is one modern ceramic option used where appearance and strength both matter. Lithium-disilicate crowns have shown survival rates of 97.4% after five years and 94.8% after eight years, although these figures do not predict the outcome of an individual crown.2

When matching the color and translucency of surrounding enamel is an important treatment objective, porcelain crowns in Encino may be one option to discuss with your dentist.

Zirconia Crowns

Zirconia is a high-strength ceramic commonly considered for teeth exposed to substantial chewing forces.

Its performance depends partly on crown design. A monolithic zirconia crown is formed primarily as one structure, while a layered crown has veneering ceramic added for appearance. Five-year fracture rates are approximately 0.71% for monolithic zirconia single crowns and 3.25% for layered zirconia single crowns.2

These figures should not be interpreted as the individual fracture risk for every zirconia crown.

Porcelain-Fused-to-Metal Crowns

A porcelain-fused-to-metal crown, or PFM crown, combines a metal substructure with an outer porcelain layer.

PFM crowns have a long clinical history and can be used on front or back teeth. Their porcelain layer can chip, while changes in the gumline can make the underlying metal margin more visible.

A dark line beside an older PFM crown can therefore be an aesthetic concern rather than proof that the crown has structurally failed. The area should still be examined because discoloration alone cannot establish whether the margin and underlying tooth remain healthy.

Gold and Metal Alloy Crowns

Gold and other metal-alloy crowns have a long record of clinical use. Long-term follow-up data extend to 25 years for metal-ceramic crowns and 50 years for some posterior gold crowns.2

These follow-up periods do not mean that every metal or gold crown will remain functional for the same length of time.

Their main limitation is appearance, which is why metal-colored crowns are now selected less often for visible teeth.

Why the Material Isn’t the Whole Answer

Two patients can receive crowns made from the same material and experience different outcomes.

Remaining tooth structure, crown fit, margin accessibility, bite distribution, grinding, dietary habits, plaque control, gum health, and trauma can all matter. Material selection is therefore one part of treatment planning rather than a standalone prediction of lifespan.

What Actually Makes a Crown Fail Early

“Crown failure” includes several different situations. The restoration may chip, loosen, or fracture, but the natural tooth, cemented connection, pulp, or surrounding tissues can also become compromised.

Aesthetic concerns and recurrent decay are common reasons crowns may be replaced.3 Other problems can involve the restoration, its retention, or the supporting tooth.

Decay at the Margin

The crown margin is the boundary where the restoration meets the prepared natural tooth.

Crown materials cannot develop cavities. Natural tooth structure at or beneath the margin can still decay when plaque remains in the area or when a defect allows bacteria to reach a vulnerable surface.

This is why a crowned tooth still requires brushing and cleaning between the teeth. The crown covers part of the tooth; it does not make the remaining structure immune to decay.

Cement Breakdown and Loosening

Dental cement helps retain and seal a crown. A crown can lose retention if the cemented connection deteriorates or if other mechanical or structural conditions interfere with the seal.

Movement can allow saliva and bacteria to enter spaces beneath the restoration. A crown that shifts, clicks, feels loose, or comes off should be assessed promptly.

A loose crown does not always require replacement. The dentist must first examine the restoration, margin, cemented surface, and underlying tooth to determine whether recementation remains appropriate.

Grinding and Clenching

Grinding and clenching repeatedly load teeth and restorations. Over time, these forces can contribute to wear, ceramic chipping, fractures, or loss of retention.

The evidence connecting sleep bruxism with failure across every type of ceramic restoration is not uniform, so grinding should not be presented as a guaranteed cause of crown failure.

It remains an important clinical consideration when a dentist observes wear patterns, fractures, or other signs of excessive loading.

Patients with grinding-related concerns can ask whether a custom mouth guard is appropriate for protecting their teeth and restorations.

Fracture of the Tooth Underneath

A crowned tooth may already have lost substantial structure through decay, fracture, a large filling, or prior treatment. The amount and distribution of the structure remaining beneath the crown influence whether the tooth can withstand future forces.

A root-canal-treated tooth is not automatically destined to fracture. Its prognosis depends on factors such as remaining tooth structure, existing cracks, restoration design, functional load, and the quality of the seal.

If the pulp inside a crowned tooth becomes inflamed or infected, root canal therapy may be considered after evaluation. A fracture extending too deeply can limit whether the tooth remains restorable.

Gum Recession and Periodontal Changes

Gum recession can expose the crown margin and part of the tooth root.

The exposed root surface lacks the enamel covering found on the crown of a natural tooth, making it more vulnerable to sensitivity, wear, and root decay. Recession can also change how a crown looks, particularly if a metal edge becomes visible.

Not every exposed margin means the crown requires replacement. Evaluation should consider margin integrity, tooth condition, gum health, symptoms, and aesthetic priorities.

Patients with bleeding, swelling, or continuing recession may also need an assessment for periodontal disease.

Habits That Shorten Crown Life

Crowns are designed for chewing food, not for repeated contact with unusually hard objects.

Avoid:

• Chewing ice.
• Biting hard candy or unpopped popcorn kernels.
• Biting fingernails.
• Opening packaging with your teeth.
• Chewing pens or other objects.
• Biting directly onto hard bones.

These habits can chip a restoration, loosen it, or fracture the supporting tooth. Ice, extremely hard nuts, popcorn kernels, and very sticky foods can damage or dislodge a crown.1

Signs Your Crown May Need Attention

A change around a crowned tooth does not reveal the cause or confirm that replacement is necessary. It does provide a reason to arrange an examination.

Contact a dentist if you notice:

• New sensitivity to hot, cold, or sweet foods: A new response around an older crown should be evaluated, particularly if it persists or intensifies.
• Pain when biting on one tooth: Bite-related discomfort can have several causes that cannot be distinguished without an examination.
• Looseness, movement, or clicking: A stable crown should not shift during chewing or cleaning.
• Red, swollen, or bleeding gums: These changes may reflect plaque accumulation, irritation, periodontal inflammation, or another concern around the restoration.
• A dark line at the gumline: An exposed metal margin on an older PFM crown can be cosmetic, but a dentist should verify the condition of the margin and tooth.
• A chip, crack, or rough edge: Even a small defect should be checked to determine whether polishing, repair, monitoring, or replacement is appropriate.
• Food repeatedly trapping around the crown: Consistent trapping can indicate a contour, contact, margin, or gum-related problem that requires assessment.
• A persistent bad taste or odor near the tooth: This change does not identify a cause, but it warrants professional evaluation.

A loose crown, cracks, chips, sharp edges, or a persistent bad taste or odor are also reasons to contact a dentist. 1

Early assessment can preserve more options. Depending on the findings, a crown may be monitored, polished, repaired, or recemented instead of automatically replaced.

How to Make Your Crown Last Longer

The most useful habits protect both the restoration and the natural tooth supporting it.
For a detailed daily-care guide, see how to take care of a new dental crown.

Floss the Margin Every Day

Brush at least twice daily with fluoride toothpaste and clean between crowned teeth each day. 1

Guide floss through the contact and clean along both sides of the tooth without snapping it into the gums. If standard floss is difficult to use around a bridge or connected restoration, ask the dental team which interdental aid suits its design.

Daily cleaning matters because plaque can accumulate beside the crown even though the restorative material itself cannot decay.

Wear a Night Guard If Grinding Is Confirmed

A night guard does not stop every episode of clenching or guarantee that a crown will not fracture. It can provide a protective surface between the teeth and redistribute contact when a dentist determines that an appliance is appropriate.
If you grind or clench your teeth, ask your dentist whether a custom mouth guard is appropriate.1

The appliance must fit the current bite and restorations. Do not assume that an old, damaged, or poorly fitting guard still provides appropriate protection.

Keep Your Recall Visits

Dental examinations allow the dentist to assess crown margins, contacts, bite, gum condition, visible damage, and symptoms.

Dental X-rays may help identify decay that is not visible during a clinical examination, but they do not reveal every margin defect or early problem. The type and timing of imaging should be based on individual clinical need.

Regular monitoring is especially important because recurrent decay can develop before a crowned tooth becomes noticeably painful.

Watch the Hard-Food Habits

A permanent crown does not require a permanently restricted diet. The practical goal is to avoid concentrated forces from objects that can fracture natural teeth as well as restorations.

Do not deliberately chew ice, hard candy, unpopped kernels, bones, or nonfood objects. Be especially cautious if the crown has already developed a rough surface, chip, or movement.

What Happens When a Crown Needs Replacing

Crown age alone does not determine the replacement process. The dentist first evaluates the restoration, margin, bite, symptoms, gum condition, and available imaging. If replacement is appropriate, the old crown is removed and the underlying tooth is assessed.

Depending on what is found, the replacement process may include some or all of the following steps:

• Removing decay or compromised material: Any decay or damaged restorative material may need to be removed before the tooth can be restored again.
• Assessing the remaining tooth structure: The dentist evaluates how much sound tooth remains and whether it can support another restoration.
• Rebuilding the tooth if needed: A core buildup may be used when additional support is clinically necessary.
• Addressing pulpal or root canal concerns: If the pulp is affected or a previous root canal requires further attention, additional treatment may be needed before the final restoration.
• Preparing for the replacement crown: When the tooth remains suitable for a crown, it can be prepared for fabrication of the new restoration.
• Evaluating the new crown before final placement: The margin, contacts, appearance, and bite are checked as appropriate before the crown is finalized.

Not every crown replacement requires every step, and the sequence can change depending on the condition of the existing crown and the tooth underneath.

The underlying condition cannot always be fully known until the old crown is removed. If little restorable tooth structure remains or a fracture extends too deeply, replacement with another crown may not be possible. Depending on the condition of the tooth, replacement may form part of a broader restorative dentistry treatment plan.

Does insurance cover crown replacement?

Dental benefit plans commonly apply eligibility rules, documentation requirements, deductibles, annual maximums, and frequency limitations. Coverage rules and frequency limitations vary by dental benefit plan.

A pretreatment estimate can help clarify anticipated plan benefits and patient responsibility before care begins, while treatment decisions should remain based on clinical appropriateness rather than plan reimbursement. 4

Check:

• Whether replacement crowns are included.
• Whether the plan imposes a frequency limitation.
• The recorded date of the previous crown.
• Whether clinical documentation or X-rays are required.
• The remaining annual maximum and deductible.
• Whether material-based alternate benefits apply.

Our guide on using dental insurance benefits before they expire provides additional planning context, but the individual policy remains the controlling source for coverage.

Clinical need and insurance eligibility are separate questions. A crown can require treatment even when a plan does not provide a benefit for its replacement.

Crown and Restorative Care in Encino with Dr. Kiai

Changes such as looseness, sensitivity, visible damage, or discomfort around a crown should be evaluated to determine whether the issue involves the restoration, the supporting tooth, or both. Crown age alone is not a reason for replacement; the decision depends on the current condition of the crown and the tooth underneath.

Patients in Encino can schedule an evaluation with Dr. Kaivan Kiai, DDS, at Encino Dental Esthetics to discuss concerns about an existing crown and the restorative options that may be appropriate.

If your crown feels different, has become uncomfortable, or appears damaged, request a dental crown evaluation in Encino.