How much tooth is removed for veneers?

"How much of my tooth will you remove?" is the single most useful question you can ask before cosmetic treatment. It separates a true veneer from a crown sold as a veneer, and it tells you how reversible your decision is. The answer should be a number, not a reassurance.

Start with how thick your enamel is

Enamel, the hard outer layer, is what veneers bond to best. It is not the same thickness all over the tooth. A study that measured upper front teeth found enamel on the front surface was thinnest near the gum, about 0.35 mm on the central teeth and 0.24 mm on the lateral teeth, and thickest near the biting edge, about 1.2 to 1.3 mm (Pahlevan et al., 2014).

That has two practical consequences. First, there is not much enamel to spare near the gum, so a careful preparation is lighter there. Second, if a dentist removes the same depth all over, the drill can go through the enamel near the gum line into the dentine underneath. Dentine is more sensitive and does not bond as reliably.

Typical preparation depths

*Edelhoff and Sorensen (2002) measured the weight of tooth removed for different preparation designs on model teeth. Real mouths vary; the figures show the scale of the difference.

The same study found that a metal-ceramic crown preparation removed about 4.3 times as much tooth as a veneer covering only the front surface. That gap is what people mean when they talk about "shark teeth" or "pegs" in photos of crowns that have come off.

Why the difference matters for the rest of your life

Enamel does not grow back. Once a tooth has been prepared for a veneer, it will always need some kind of covering. That is acceptable when the preparation is light: if the veneer ever needs replacing, there is still plenty of tooth left to bond a new one.

A crown preparation is different. With most of the outer tooth gone, the next step if a crown fails is usually another crown, and over a lifetime each replacement can take a little more. Heavily reduced teeth are also more likely to need root canal treatment at some point, because the nerve sits closer to the surface.

This is why our site keeps saying the same thing in different ways: a veneer and a crown are different treatments, and the price per tooth matters less than which one you are getting. Our page on veneers or crowns? explains the difference with diagrams.

When more preparation is justified

There are good reasons to remove more tooth:

• Large old fillings that would be left unsupported under a thin veneer.
• A broken or heavily worn tooth that needs strength as well as looks.
• A root-filled tooth, which can be weaker and darker.
• A tooth well out of line, where a veneer alone would look bulky. Straightening first is sometimes the better answer; see veneers or straightening first?
• A very dark tooth that needs more room for ceramic to mask the colour.

Each of these should be written next to the tooth in your plan. A plan that says "crown" for twenty teeth with the same reason, or no reason, is worth questioning.

Preparation and how long veneers last

Ceramic veneers bonded to enamel have a good long-term record. A review of 25 studies covering about 6,500 porcelain laminate veneers estimated that 95.5% were still in place after 10 years (Alenezi et al., 2021). Fracture was the commonest problem, followed by veneers coming loose. Keeping the bond in enamel is one of the things dentists do to keep those numbers high.

What a careful preparation looks like

1. A plan made before the drillThe new shape is designed first, often as a mock-up, so the dentist only removes what the design needs. Teeth that are already set back may need almost nothing.
2. Depth guidesMany dentists use special burs or a guide made from the mock-up to control depth, rather than judging by eye.
3. Lighter near the gumThe preparation follows the enamel: thinner where the enamel is thinner.
4. Smooth marginsThe edges where the veneer meets the tooth are finished smoothly so the gum stays healthy.
5. A scan of the resultThe prepared teeth are scanned or copied so the laboratory can make veneers of the planned thickness.

What happens to the tooth over a lifetime

It helps to picture the long run. Suppose you are 55 and have laminate veneers on your upper front teeth. If they follow the pattern in the research, most will still be in place in your mid-sixties. Some may chip or come loose before then, and a few may need replacing. Each replacement means removing the old veneer and its cement, and a dentist will usually take away a little more tooth to get a clean, fresh surface. With a light first preparation, there is room for that. The tooth can go through two or even three sets of veneers and still be a healthy tooth underneath.

Now picture the same teeth crowned at 55. A crown can last many years too, but when one fails, the replacement is another crown on a tooth that already lost most of its outer layer. If decay gets under the edge, or the tooth fractures, the next steps are root canal treatment, a post, or losing the tooth and moving to an implant. None of that is inevitable, but the starting point is very different.

Signs a plan may be removing too much

• Every tooth in the smile is listed as a crown, with no reasons given.
• The word "veneer" is used for a treatment that covers the whole tooth.
• You are told preparation is "standard" and the same for every tooth.
• Nobody can tell you roughly how many millimetres will be removed.
• There is no mock-up or design stage before preparation starts.
• The price per tooth is far below the clinic's own laminate veneer price, which often means it is not a laminate veneer.

None of these proves a plan is wrong. Together, they are a reason to ask for a second opinion, which your UK dentist can give from the written plan and an X-ray.

Questions to ask before any tooth is prepared

• For each tooth, is this a veneer, a crown, bonding or no treatment?
• Roughly how much will you remove from the front of the tooth, in millimetres?
• Will the preparation stay in the enamel?
• Why does any healthy-looking tooth on my plan need a crown?
• Will I see a mock-up of the new shape before you start?

If the answers are vague, or you are told that "everyone has crowns now", slow down. Our checklist for choosing a veneer clinic has more questions, and our page on Turkey teeth explains how over-preparation became a headline.

Common questions

Do veneers damage your teeth?

Preparing a tooth for a veneer removes a thin layer of enamel, and that cannot grow back, so the decision is permanent. A careful preparation stays in the enamel and keeps most of the tooth. Crowns remove much more.

Is the drilling painful?

Preparation is done under local anaesthetic. Afterwards some people feel sensitivity for a few days, especially if the preparation reached the dentine near the gum.

How thick is a veneer?

Ceramic laminate veneers are commonly around half a millimetre thick, sometimes less. The tooth is reduced by a similar amount so the veneer does not stick out.

Can I have veneers without any drilling?

Sometimes. If your teeth are small, worn or set back, a veneer can occasionally be added with little or no preparation. If teeth are already forward or large, no-prep veneers tend to look bulky.

Why would a clinic suggest crowns instead of veneers?

Good reasons include large old fillings, a broken or root-filled tooth, or a tooth that is badly out of line. 'It is quicker' or 'it lasts longer' alone are not good reasons to crown healthy teeth.

Sources

1. Edelhoff D, Sorensen JA (2002) Tooth structure removal associated with various preparation designs for anterior teeth. J Prosthet Dent
2. Pahlevan A et al. (2014) Enamel thickness after preparation of tooth for porcelain laminate. J Dent (Tehran)
3. Oral Health Foundation: veneers (a small amount of enamel is removed)
4. Oral Health Foundation: dental crowns
5. Alenezi A et al. (2021) Long-term survival and complication rates of porcelain laminate veneers. J Clin Med

Checked October 2026. Where we give our own view as a clinic, we say so.