e.max Crowns and Veneers

Veneers and crowns in lithium disilicate ceramic: who they suit, how they are made, what the risks are and how long they last.

Written by: Dt. Dilek AKSU GÜLER

What is e.max?

In dentistry, e.max is the name most often used for lithium disilicate, a glass ceramic that contains no metal. It is the name of a material, not of a treatment: the same material can be used for a veneer, which covers only the front surface of the tooth, or for a crown, which covers the whole tooth. Which one suits you depends on the state of your tooth.

For crowns and for most veneers, tissue is removed from the tooth, and that tissue does not grow back1. In some selected cases a veneer can be made without touching the tooth; this does not suit everyone, and it does not mean the procedure can be undone.

This distinction matters. Putting a crown on a healthy tooth means removing far more tooth tissue than a veneer would. If you are offered a crown, ask why: the tooth should have a large loss of structure, a fracture or a weakness that cannot be protected another way.

Note: IPS e.max is a product family, and it also includes other ceramics such as zirconia. On this page, following common usage, the name e.max refers to lithium disilicate restorations.

  • e.max is a ceramic material, not a treatment; both veneers and crowns are made with it.
  • A crown needs far more tooth tissue removed than a veneer; the tissue removed does not grow back.
  • In studies, most ceramic veneers are still in the mouth after 10 years; this does not mean no problem arose during that time.
Dentist and a smiling man standing in front of a fish wall display

Who it suits, and who it does not

Where it may be suitable

  • Discolouration that whitening does not improve
  • Small chips, wear or irregular shapes on front teeth
  • Gaps between teeth small enough not to need orthodontic treatment
  • Teeth with a large loss of structure or a fracture that need protecting with a crown

Where it is not suitable, or another treatment comes first

  • Healthy, well-shaped teeth. Do not have veneers only for colour; teeth whitening should be considered first.
  • Marked crowding or a bite problem. Rather than correcting teeth by cutting them down, orthodontic treatment should be considered first.
  • Untreated gum disease or decay. These are treated first.
  • Severe clenching or grinding. The risk of the ceramic fracturing increases; your dentist may recommend a night guard or choose another material.
  • Not enough enamel. Veneers hold most reliably when they are bonded to enamel. On a tooth with little enamel, where the veneer has to be bonded to the tissue beneath the enamel (dentine), the risk of failure is higher2; this needs assessing tooth by tooth.
  • Long bridges and heavy chewing loads at the back of the mouth. Here zirconia or metal-ceramic restorations may be considered, depending on the bridge design and the bite.

Where it has limits

  • Very dark teeth. Thin, translucent veneers may not mask the colour well enough. More opaque options are considered; these may need more tissue removed.

The right option is decided at an examination, with X-rays assessed where needed.

A patient and their dentist after treatment was completed at Antlara Dental
After treatment, Antlara Dental, Antalya

What can be done instead of a veneer or crown?

A veneer or crown is not the only option, and often it should not be the first.

  • Doing nothing. If your teeth are healthy and your concern is only about how they look, leaving them alone is always an option.
  • Teeth whitening. For concerns about colour, it can work without removing any tooth tissue.
  • Shaping with composite (bonding). Used for small chips and gaps, touching the tooth very little or not at all. It stains more easily than ceramic and is easier to repair if damaged1. It should not be thought of as fully reversible: the tooth surface is treated so the material can bond.
  • A filling or a partial restoration. An inlay fills a cavity inside the tooth; an onlay also covers weakened cusps (the raised chewing points) where needed. If enough of the tooth remains, these can take the place of a full crown. Having had root canal treatment does not on its own mean a full crown is needed.
  • Orthodontic treatment. Corrects the alignment of the teeth without cutting them down; it takes longer.
  • Another ceramic. Zirconia may be preferred for back teeth and bridges, and hand-layered feldspathic porcelain for thin veneers.
e.max (lithium disilicate)ZirconiaMetal-ceramic
What it isGlass ceramic with no metalCeramic with no metal, made from zirconium oxidePorcelain on a metal framework
Where it is used most oftenVeneers and single crownsCrowns on back teeth, bridges, implant crownsBack teeth and long bridges
AppearanceTranslucent, close to a natural toothMore opaque; newer types are more translucentThe metal framework can look dark at the gum line
StrengthHighHigherHigh
Long-term data as a veneerYesNoNot used

How are e.max restorations made?

The treatment is usually completed in two or three appointments.

How much tissue is removed from the tooth depends on its colour, its position, any existing loss of structure and the restoration chosen. For the ceramic itself, the smallest thickness the manufacturer gives for its product is 0.4 mm for a veneer and 1 mm for a crown3. These are lower limits that apply only to particular products, designs and bonding methods set out in the manufacturer's instructions; whether they apply to your tooth is decided by your dentist. They are not the amount of tissue removed from the tooth. Because a crown needs tissue removed from every surface of the tooth, the total loss is clearly greater than for a veneer.

  1. Examination and planning

    An examination, with X-rays where needed, assesses decay, the gums and the bite. If treatment is suitable, an impression or a digital scan of your teeth is taken; you may be able to try the result in your mouth with a temporary model (mock-up).

  2. Preparing the tooth

    Under local anaesthetic, the tooth is reduced just enough for the planned restoration. For a veneer, the aim is to keep the preparation within the enamel. An impression is taken. For crowns and deeper preparations, temporaries are fitted; very thin preparations may not need them.

  3. Laboratory

    The ceramic is pressed, or shaped from a ceramic block by a computer-controlled machine (CAD/CAM); its colour and surface are worked to match the neighbouring teeth.

  4. Try-in and bonding

    Fit, colour and bite are checked in the mouth. Once you agree, the ceramic is bonded permanently to the tooth with a special adhesive.

  5. Review

    The bite and the fit at the gum are checked again, and you are given advice on care.

Risks and benefits

Risks and disadvantages

  • It cannot be undone. Tooth tissue that is removed does not grow back; from then on, the treated tooth will always need a restoration.
  • New decay. A veneer or crown does not protect the tooth beneath it from decay. New decay can develop at its edges or underneath it, and further treatment may be needed.
  • Sensitivity. Sensitivity to heat and cold may follow the procedure; it usually eases within weeks.
  • Fracture or cracking. Biting hard objects, clenching and knocks can break the ceramic. Small surface chips can sometimes be repaired; larger cracks and fractures may mean the restoration has to be replaced.
  • Coming loose. This happens with veneers, especially when they are bonded to the tissue beneath the enamel.
  • Effect on the nerve. The deeper the preparation for a crown, the more likely the tooth is to need root canal treatment later.
  • Staining at the edges and receding gums. Over the years, the edge of the restoration can become visible.
  • Need for replacement. No veneer or crown lasts for ever. When the time comes it has to be replaced, and each replacement may take a little more tissue from the tooth.

Benefits

  • With no metal framework, no metal edge shows. The colour of the tooth underneath, staining at the edges or receding gums can still make it look darker.
  • It lets light through in a way similar to a natural tooth.
  • Its surface stains less than composite.
  • Veneers bonded to enamel have good long-term results.12

Recovery and care

After the procedure, wait until the anaesthetic has worn off before eating or drinking. Mild sensitivity and tender gums are normal in the first days.

Daily care

  • Brush twice a day with a fluoride toothpaste, and clean between your teeth every day.
  • Do not bite hard objects, and do not use your teeth as tools.
  • If you clench or grind your teeth, wear the night guard your dentist recommends.
  • Keep up regular check-ups; small problems are easier to solve when they are found early.1

How long does it last?

It is a rate, not a number of years. The figures below describe restorations staying in the mouth; they do not mean that no problem or repair was needed during that time.

Veneers

A 2025 review combining 29 studies found that, of every 100 lithium disilicate veneers, about 97 were still in the mouth after 10 years4. The same review found no significant difference in this respect between lithium disilicate and feldspathic porcelain; for zirconia veneers there were no long-term data. Another review, from 2024, looked at different glass-ceramic veneers together: after an average follow-up of 6.5 years, about 90 in every 100 veneers were still in the mouth5. The two results come from different studies, so they cannot be compared directly.

For veneers, keeping the enamel is one of the important factors. In a retrospective study that followed 580 porcelain veneers for up to 12 years, veneers bonded to the tissue beneath the enamel had about 10 times the risk of failure2.

Crowns

For single crowns, the differences between materials are small. A 2026 review reported how many of every 100 crowns were still in the mouth after five years: about 98 to 996 for monolithic (single-piece) lithium disilicate, 97 for metal-ceramic and 97 for monolithic zirconia. These estimates are for single crowns on natural teeth. In other words, "a stronger material" and "a restoration that stays in the mouth longer" are not the same thing.

When to contact a dentist

Contact your dentist if any of the following happens:

  • The veneer or crown cracks, breaks or moves
  • It comes off (keep the piece, and do not glue it back yourself)
  • Sensitivity that lasts more than a few weeks or keeps getting worse
  • Pain that starts on its own or wakes you at night
  • Swelling, bleeding or discharge from the gum
  • It feels high when you bite, or your jaw feels tired

Emergencies. If pain is increasing, or you have facial swelling or a fever, see a dentist where you are without waiting for the clinic's reply. If you have difficulty breathing or swallowing, or swelling in the mouth or neck that spreads quickly, go to an emergency department or call 112.

What determines the cost?

Fees are not given on this page. A treatment plan is prepared for you after an examination, with X-rays where needed. The main factors that shape it are:

  • How many teeth need treatment, and which type of restoration (veneer or crown)
  • Treatment needed first: decay, root canal treatment, gum treatment
  • The ceramic used and the laboratory work
  • A night guard, if needed

Ask for the plan in writing, including what it covers and which procedures would be assessed separately.

Find out whether your teeth are suitable

Send a photograph of your teeth, and an X-ray if you have one. Our dentists can give preliminary guidance. Whether a veneer or crown is suitable is decided at an examination, with X-rays assessed where needed.

Frequently Asked Questions

What is the difference between e.max and zirconia?

Both are metal-free ceramics. e.max (lithium disilicate) is more translucent and is used for veneers and single crowns. Zirconia is stronger and more often chosen for back teeth and bridges. For single crowns, five-year survival is close; the choice depends on the restoration and the bite.

Does e.max treatment involve cutting the tooth?

In most cases, yes. For a veneer a thin layer is removed from the front of the tooth; for a crown, tissue is removed from every surface. In some selected cases a veneer can be made without touching the tooth, but not for everyone. Removed tissue does not grow back.

Does e.max stain or turn yellow?

The glazed ceramic surface stains less than composite. Staining over time is usually at the edge, where the adhesive is. Whitening does not lighten crowns or veneers7, so tell your dentist if you plan to whiten your natural teeth.

Can e.max break?

Yes. Biting hard objects, clenching or grinding, and knocks can increase the risk. If you clench your teeth, tell your dentist; a night guard may be advised.

Can an e.max veneer fall off?

It can come loose, although this is uncommon. With veneers the risk rises when they are bonded to the tissue beneath the enamel, which is why keeping the preparation within the enamel matters. If it comes off, keep the piece and see your dentist.

Is e.max mixed with zirconium?

IPS e.max CAD and Press are lithium disilicate ceramics. They are not zirconia, and they are not the same as zirconia-reinforced lithium silicate ceramics such as Celtra Duo and Vita Suprinity8. Zirconium is a metal; dentistry uses its oxide, zirconia.

How many appointments does it take?

Usually two or three: an examination and planning, preparing the tooth with an impression or scan, then try-in and bonding once the laboratory has made the restoration. A review appointment follows.

Can the tooth under an e.max crown or veneer decay?

Yes. A veneer or crown does not protect the tooth beneath it from decay; new decay can develop at its edges or underneath it, and further treatment may be needed. Daily cleaning between the teeth and regular check-ups matter.

Dt. Dilek Aksu Güler

Dt. Dilek AKSU GÜLER

Dentist · Founder

She has completed advanced training in implantology and works in aesthetic restorations and smile design.

Sources

  1. Veneers. American Dental Association, MouthHealthy.↩
    mouthhealthy.org
  2. Porcelain laminate veneers, 580 veneers up to 12 years: effect of preparation in enamel versus dentin. International Journal of Periodontics & Restorative Dentistry 2013;33(1):31-39. 2013.↩
    doi.org
  3. IPS e.max CAD product information. Ivoclar.↩
    ivoclar.com
  4. Survival and complication rates of ceramic laminate veneers by material: systematic review and meta-analysis (29 studies). Journal of Esthetic and Restorative Dentistry 2025;37(3):601-619. 2025.↩
    doi.org
  5. Clinical survival of glass-ceramic restorations: meta-analysis of 46 articles. Journal of Prosthetic Dentistry 2024;132(5):879.e1-e13. 2024.↩
    doi.org
  6. Survival of monolithic lithium disilicate, monolithic zirconia and metal-ceramic single crowns: systematic review. International Journal of Prosthodontics 2026;39(3):308-324. 2026.↩
    doi.org
  7. Teeth Whitening (patient information). American Dental Association, MouthHealthy.↩
    mouthhealthy.org
  8. Lithium silicate-based glass ceramics in dentistry: a narrative review of composition and strength. Materials 2023;16(12):4398. 2023.↩
    doi.org
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