Which Materials Are Named in Published Descriptions of Dental Crowns and Veneers

Which materials do published sources name for dental crowns?

The NHS names the materials for a dental crown in one sentence on its Dental treatments page, and that sentence is where an answer to this question has to start: "A crown is a type of cap that completely covers a real tooth. It's usually made from metal, ceramic or porcelain fused to metal and is fixed in your mouth." Three material classes are named there and no more: metal, ceramic, and porcelain fused to metal. The page carries its own review stamp, showing it was last reviewed on 8 July 2026 with the next review due on 8 July 2029. Nothing in that sentence describes a crown fitted in Turkey, and the word Turkey does not appear anywhere on the page we quote.

Reading the word usually is the first thing that sentence asks of anyone quoting it. The NHS writes that a crown is "usually made from metal, ceramic or porcelain fused to metal", which describes what is common rather than what is possible, and a guide written for patients is not a catalogue of every material a laboratory can work with. The same page uses the same hedge for two other devices. On bridges it says: "A bridge is usually created from metal and porcelain, and will be fixed in your mouth (unlike dentures, which can be removed)." On dentures it says: "They're usually made from metal or plastic." A reader who treats any of those three lists as exhaustive is treating a general-guidance sentence as a specification.

What a crown is for is stated separately from what it is made of, and the NHS keeps the two apart: "Crowns can be fitted where a tooth has broken, decayed or been damaged, or just to make a tooth look better." That sentence covers repair and appearance in the same breath, which matters for this question because the same object, made of the same materials, can be fitted for either reason. The page then says where crowns sit in the health service: "With the exception of teeth whitening, implants and veneers, the treatments on this page are usually available on the NHS." Crowns are inside that set. Veneers are named among the exceptions.

Absent from the NHS list are the material names that circulate around this search term. The sentence naming crown materials names metal, ceramic and porcelain fused to metal; it does not name zirconia, lithium disilicate or any trade name for a glass-ceramic. Under the sourcing order our methodology page sets out, that is a fact about the document rather than a claim about dentistry: an institution publishing its own patient guide describes crowns at the level of material classes, and brand names belong to manufacturers and laboratories rather than to a health service guide. Anyone who wants a specific ceramic named for a specific crown is asking a question the NHS page does not set out to answer.

Titanium appears on the same NHS page, but for a different component, and conflating the two is an easy mistake for a reader hunting material names. The page says: "To fit an implant, a titanium screw is placed into the jaw bone to support a crown, bridge or denture." The screw is not the crown. What sits on top of it is a crown, a bridge or a denture, each with its own material sentence in the same NHS guide, so a single restoration can involve one material in the bone and another in the mouth. The page also records what implants cost patients in access terms: "Implants are usually only available privately and are expensive."

Crowns also turn up on the NHS page as the end point of other treatments, which is another reason the same material sentence has to serve several situations. After root canal treatment the page says: "The root canal is filled and the tooth is sealed with a filling or crown to stop it becoming infected again." After a chip it says: "If the tooth is just chipped, make a non-emergency dental appointment to have it smoothed down and filled or a crown fitted." In neither case does the page name a different material for the crown involved. One list of three classes covers the crown fitted after infection, the crown fitted after damage, and the crown fitted to change how a tooth looks.

One further gap in the published description is worth stating rather than filling. The NHS records that a crown is made away from the chair — "It can take some time for the lab to prepare a new crown, so you'll probably get a temporary one until it's ready." — but it does not name what the temporary crown is made of, and it does not report which material is used in any particular clinic or country. Our evidence audit page records a claim that no qualifying source supports as unsourced rather than as an invitation to guess. The honest answer to what a crown is made of, from this source, is the three classes it names, and nothing beyond them.

Which materials do published sources name for veneers?

The NHS names veneer materials inside a description of the procedure rather than in a list, in the Dental veneers section of the same Dental treatments page, where veneers are defined as "new facings for teeth" before any material is mentioned. The material sentence reads: "An impression is taken, and a thin layer of porcelain or natural-coloured material is fitted over the front of the tooth (similar to how a false fingernail is applied)." Two things are named there and they are not the same kind of thing. Porcelain is a material. Natural-coloured material is an open category that could cover several. A patient asking what their veneers are made of, and reading only this sentence, has been given one named ceramic and one description of an appearance.

Before naming any material the same page defines the device, and the definition is doing work that the material sentence is not: "Veneers are new facings for teeth that disguise a discoloured or chipped tooth." A facing covers a face. The verb the NHS chooses is disguise, which places the veneer in the appearance column rather than the repair column, and it names the two conditions it is meant to disguise as discolouration and chipping. Neither the definition nor the material sentence says how thick the layer is in millimetres, and neither says which ceramic is used for which case.

The open category is where most of the ambiguity in this search term lives. Composite resin, applied directly, and a laboratory-made ceramic shell both fit inside the NHS wording "a thin layer of porcelain or natural-coloured material", and the page does not separate them or say when one is used instead of the other. Two patients could be given accurate descriptions using that one sentence and still have received quite different work. A category term is left as a category term here, so this page does not convert natural-coloured material into a specific ceramic that the source never names.

How a veneer is paid for in the United Kingdom is stated plainly by the NHS and it differs from the position for crowns: "Veneers are generally only available privately, unless you can show a clinical need for them." The same page repeats the point in its opening summary: "With the exception of teeth whitening, implants and veneers, the treatments on this page are usually available on the NHS." That is an access statement, not a material statement, and it is quoted here because the two are often blurred in the same conversation. What a veneer is made of and who pays for it are separate questions with separate answers in the same document.

Preparation is described by the NHS in a sentence of its own, and it is deliberately conditional: "To fit some veneers, the front of the tooth is drilled away a little, but not all veneers need this." Some, a little, and not all are three hedges in one twenty-word sentence, and they carry the meaning. The sentence does not say which veneers need drilling, how much a little is, or who decides. It also does not link the amount of preparation to the material chosen, so a reader cannot infer from the ceramic named what was done to the teeth underneath it.

How the guide frames itself sets a ceiling on all of this, and the framing is in its opening lines: "This is a guide to the main treatments carried out by dentists. Some are readily available on the NHS, while some may only be available on the NHS in certain circumstances." A guide to the main treatments is not a specification, and the page then hands the specific question back to the person in front of the patient: "Always ask your dentist whether the treatment they're recommending is available on the NHS and how much it will cost before you go ahead." That instruction is about availability and cost rather than material, but it shows where the document expects the detailed answering to happen: a patient who wants the exact ceramic named for their own veneers is being pointed, by the source itself, at a conversation rather than at a web page.

Where this leaves the original question is worth writing down rather than papering over. On veneers the NHS names porcelain and an open category; it names no glass-ceramic by trade name, no zirconia, and no composite by name. It reports nothing about which materials are used in any particular country, and the page never mentions Turkey. Our methodology page reports absence of evidence as absence of evidence, and this page does the same with that silence. A named source that gave material by country would change the answer here, and no such source is quoted on this page.

What is the published difference between a veneer and a crown?

The NHS describes a crown and a veneer in two separate sentences on the same Dental treatments page, and the difference between them has to be read across those two sentences because the page never writes a third one comparing the two. On the crown it says: "A crown is a type of cap that completely covers a real tooth." On the veneer it says: "Veneers are new facings for teeth that disguise a discoloured or chipped tooth." Coverage is the word carrying the distinction: a cap that completely covers, against a facing on the front. For anyone searching what teeth fitted abroad are made of, this is the difference that decides which material sentence applies.

Preparation splits the two devices a second time, and again the NHS states each side separately. For crowns: "To fit a crown, the old tooth will need to be shaped for the crown to be fixed on to." For veneers: "To fit some veneers, the front of the tooth is drilled away a little, but not all veneers need this." One sentence uses will need, with no exception attached. The other uses some and not all. Reading them side by side is what turns two descriptions into a comparison, and the difference in modal verbs is the part a summary usually loses first.

How that comparison was built here should be visible to anyone checking it. The NHS does not publish a sentence that begins the difference between a crown and a veneer is; it publishes a crown paragraph and a veneer paragraph in one guide, and the contrast drawn in this section is ours, assembled by placing its own sentences next to each other. That assembly is declared here where it happens rather than presented as a quotation. A reader who wants to check it should read both sections of the source, because the comparison exists in the reading and not in a single line of the document.

Which device a particular person received is a different question again, and no source quoted on this page answers it. The NHS describes what crowns and veneers are; it does not record what was fitted to any individual, in the United Kingdom or in Turkey, and it does not describe the practice of preparing a full arch of teeth. A patient who was told they were having veneers and who now wants to know which of the two descriptions matches their own mouth is asking a clinical question about themselves. That question belongs to an examination and to their own records, and this page does not attempt it.

Access separates the two devices a third time in the same NHS guide, and this axis is the one patients tend to meet first. Crowns fall inside the sentence "With the exception of teeth whitening, implants and veneers, the treatments on this page are usually available on the NHS." Veneers fall outside it, and the page says so again in their own section: "Veneers are generally only available privately, unless you can show a clinical need for them." The wording leaves one door open, clinical need, and does not say who assesses it or against what threshold, which is another place where the published description stops short of the question people ask.

A third device sits between the two in the same NHS guide and is easy to mistake for either. The NHS describes it as "a fixed replacement for a missing tooth or teeth" and gives its material separately: "A bridge is usually created from metal and porcelain, and will be fixed in your mouth (unlike dentures, which can be removed)." A bridge replaces a tooth that is gone; a crown covers a tooth that is there; a veneer faces a tooth that is there. Three descriptions, three material sentences, and one guide. The NHS also supplies its own analogy for the veneer alone, comparing the layer to "how a false fingernail is applied", and that image belongs to the veneer sentence rather than to the crown one. Borrowing it for a crown would describe the wrong device, and the guide keeps the three in separate sections for that reason.

Vocabulary is the last thing this comparison exposes, and it is why the question is searched at all. The NHS calls one device a cap and the other a facing, in plain words written for patients, while a treatment plan or a consent form may use crown, veneer, laminate or a trade name for a ceramic. Two documents describing identical work can therefore look like descriptions of different work. Reading the material sentence for the wrong device is the specific error this section exists to prevent, because a cap that completely covers a real tooth and a thin layer fitted over the front of the tooth are not made in the same way.

What did the BDA report its members observed about tooth preparation?

The British Dental Association surveyed its members about patients returning from dental treatment abroad, and one of its published findings is about how much tooth was removed: "Several dentists reported concerns about over-prepared teeth – where more of a tooth is removed than necessary – as well as ill-fitting crowns and implants that fell out." The BDA states the base for the survey in a line of its own: "According to a survey of 1000 UK dentists in the UK:" What that sentence records is what dentists reported seeing, which is a professional observation rather than a count of how often the thing happens.

Two individual cases are set out by the BDA in the same release, and both are counts of teeth rather than names of materials. In the first, a dentist reported a young man given "21 full crowns inappropriately placed" to manage what that dentist described as "clearly an orthodontic case to correct misaligned teeth." The second is reported in a sentence of its own: "Another said that they saw a patient with dental phobia who had 14 crowns placed under sedation, and who now needs four root canal treatments." The BDA's chair, Eddie Crouch, puts the general position in the same release: "Complex courses of treatment typically require detailed preparation and a number of follow-up visits." Each of those describes how much work was done to the teeth, which is what this section asks; none of them says what the crowns were made of.

The denominator moves inside the BDA's own page, and anyone quoting a figure from it needs to know which base they have picked up. One block is introduced with: "The appeal of travelling abroad for dental treatment appears to be widespread, with 94% reporting that they had examined patients who had gone on such trips: however, the findings indicate that the lure of a quick fix may carry considerable risks. Of these dentists:" A later block uses a different base: "93% of all dentists responding identified concerns around continuity of care, 79% were unhappy with the quality of care, 77% mentioned the difficulties associated with seeking redress or making a complaint, while 66% flagged concerns over communications between patients and practitioners."

Crowns are named by the BDA as the treatment its members most often had to follow up: "87% identified crowns as the treatment most likely to require follow-up work, closely followed by implants at 85%." That sentence names a device and a follow-up burden rather than a ceramic, and every percentage in the survey is a proportion of dentists ticking a box rather than a proportion of patients experiencing something. The same survey records who paid for the repair work: "Over 40% (346 dentists) said the remedial treatment was provided by the NHS." Neither base the BDA states elsewhere produces that percentage from that count: 346 is under two fifths of the BDA's full survey of 1000 dentists, and under two fifths of the smaller group the BDA's 94% figure implies. The mismatch is reported here rather than settled by picking a base.

Extensive work on healthy teeth is described by the BDA in its members' own terms, and this is the passage that touches preparation most directly. Its report records that some dentists expressed alarm at patients having extensive work done to previously healthy teeth in what the BDA calls smile makeovers, work "which would require a lifetime of costly maintenance, or could even lead to the loss of teeth and a need for dentures." No material is named in that sentence either. What is named is the amount of tooth structure involved and the maintenance that follows.

Gum health is named by the BDA as a condition its members saw ignored, and it is the one observation in the survey that links preparation to what happens afterwards: "Others were worried that treatment proceeded despite having untreated gum disease, which was likely to increase the risk of crowns and implants failing, as well as being a major contributor to infection and pain." What that sentence reports is a professional expectation about risk rather than a measured failure rate, and the BDA words it that way itself with the phrase was likely to increase. Read beside the crowns finding above, it describes a sequence dentists said they saw: teeth prepared, restorations fitted, and an underlying condition left in place beneath them.

Two limits on this source are recorded here rather than left for a reader to discover. The BDA is a professional body, and our methodology page puts guidance issued by professional bodies last in its order of preference, so this survey is quoted as an attributed statement and not as a stand-alone measurement. Its own pages also disagree with each other on one figure: the BDA media-centre page reports 94% of dentists examining such patients, while the BDA news page states "95% of dentists reported that they have examined patients who have travelled abroad for dental treatment." Both numbers are the BDA's, and this page reports the discrepancy instead of choosing the more convenient one.

What term does the peer-reviewed literature use for the appearance?

The peer-reviewed article that writes the slang term down beside a dental description is filed under the PMC record PMC11909844, and it is not the only record in this corpus that writes the phrase down at all. The sentence is: "Dental modifying treatment may also be obtained on a whim while coming across local advertisements for cheap dental work, especially exaggerated veneers (‘Turkey Teeth’)." What that sentence names is an appearance and a way of arriving at it, not a material. The teeth in question are called exaggerated veneers, with the popular phrase set beside it in quotation marks, and the article says nothing about which ceramic any such veneer is made from.

The article is a Perspective piece, single-authored by Irmgard L. Bauer of the College of Healthcare Sciences at James Cook University, published in Tropical Diseases, Travel Medicine and Vaccines (PMID 40087729, DOI 10.1186/s40794-024-00242-z). The author line was read from the record itself rather than recalled, because a correct journal, a correct identifier and a correct sentence can still sit beside an invented author name. A Perspective is a discussion article rather than a systematic review, and its scope is set out in its own aims: "This article represents the first exploration of a range of topics relevant to an until now neglected, yet potentially highly important, area of health care."

A caveat travels with this quotation wherever it goes, and the article states it plainly: "Importantly, this discussion specifically excludes the topic of dental tourism." The paper is therefore not a source on treatment obtained abroad, on Turkish clinics or on the outcomes of either, and it must not be cited as though it were. It is a source for one narrow thing: that a peer-reviewed journal wrote the phrase down and attached the words exaggerated veneers to it. Quoting it for anything wider would be reading past a sentence the authors put there to stop exactly that.

Where the phrase sits in the article changes how much weight it can carry. It appears in a passage about behaviour while travelling, alongside the sentence "Other problems originate in unwise behaviour, including holiday-inspired body modifications.", and the term arrives as an aside in parentheses rather than as a definition the article sets out to give. An apposition is treated here as an apposition. The phrase is recorded in the literature; it is not defined there, and this page does not upgrade a parenthesis into a clinical definition of what the teeth are.

A second peer-reviewed record in this corpus writes the same phrase down, to a different end. Doughty J, Moore D, Ellis M and colleagues reviewed UK newspaper reporting on dental tourism in the British Dental Journal, published in 2025 (volume 238, issue 4, pages 230 to 237; DOI 10.1038/s41415-025-8330-2; PMC record PMC11870843). Of the category those newspapers built, the review says: "The convenience of collectively placing all overseas dentistry within this category should be acknowledged as both unfair and inappropriate, and yet has become a recognised colloquial term in the zeitgeist for what is otherwise a difficult-to-define and complex social phenomenon." It also records what the phrase did to the people it was applied to, saying it "has created a group identity: people who have all been to similar places, to have similar procedures, have had similar experiences on their journey and ultimately, obtained a similar aesthetic outcome".

The two records are not doing the same job. The Perspective sets the phrase beside a look, exaggerated veneers, in a single parenthesis, and those two words appear only there and only once. The review takes the phrase itself as its subject and studies how newspapers used it, so it is a source on how the phrase was reported rather than on what any tooth is made of. Neither names a material, and two records are not a literature.

What follows for the question this page asks is a plain limit. Neither peer-reviewed record that names the phrase names a material, so a material answer cannot be built from either, and anyone answering the question from the literature is answering from a different literature entirely: the general body of work on crown and veneer materials, none of which is written about any particular country. This page keeps the two apart rather than letting the phrase borrow authority from work that never mentions it.

What does Google's AI Overview currently answer for this query, and which sites does it cite?

Google's answer to this exact query was captured once and stored, and our methodology page declares what a design could not measure rather than letting the gap pass; one capture is reported here as one capture. In the stored result an AI Overview sits at the top of the page and answers the material question directly, describing what happens to the teeth underneath in the words "placed over heavily shaved natural teeth". It then names two material families in its own bullet points. The capture was taken on 5 August 2026 for the United Kingdom, with the location and language parameters recorded inside the file alongside the result, and everything reported in this section is what that single file contains. Nothing in this section is offered as evidence about teeth; the answer box is the thing being looked at, not the thing being trusted.

Two material entries appear in the overview, and both are quoted here as the object being measured rather than as evidence. The first reads: "Zirconia: A very strong, opaque white metal-oxide ceramic often used for full crowns due to high durability." The second reads: "Porcelain / E-Max: A glass-ceramic material prized for a more natural, translucent look compared to solid zirconia." Neither name appears in the sentence the NHS uses for crown materials. Our evidence audit page lists a figure produced by a language model among the things that do not count as a source, so these lines are recorded as a measurement of what the search engine says, not as a source for what the teeth are made of.

Two further entries in the same overview describe preparation rather than material. One reads: "Crowns over veneers: Patients are often prepped for full-coverage crowns rather than thin veneers." The other reads: "Tooth reduction: Natural teeth are aggressively shaved down into small pegs or stumps to support the artificial caps." Our methodology page allows a source of this kind to count as evidence that something is being said rather than as evidence for a fact, and what is being said here is being said by a generated summary rather than by a named clinician or regulator. The wording is reproduced because this section is about what the answer box says, and paraphrasing it would hide the thing being examined.

Which sites the overview draws on is the part of the capture with the clearest result. Nine source links are attached to it, resolving to eight distinct domains, and all eight are dental practice or clinic websites: marylebonesmileclinic.co.uk, bespokesmile.co.uk, chapeldentist.co.uk, dentspa.com, www.southkenmd.co.uk, dentalaysturkey.com, queensgatedental.co.uk and www.yorkshiredentalsuite.co.uk, written here as the stored file writes them. Measured against the order of preference our methodology page sets out, what is absent here matters as much as what is present. No health service page, no regulator, and no peer-reviewed journal appears among them, so for teeth searched by material the citation pool in this capture contains no first-tier publisher at all.

The rest of the stored result records how the question is surrounded on the page. Four related questions are listed in the People also ask box: "Will UK dentists touch Turkey teeth?", "How long do Turkish teeth last?", "Are Turkey teeth good quality?" and "Are Turkey teeth safe in NHS?" Eight further searches are listed under People also search for, among them "What are turkey teeth made of crowns" and "What are turkey teeth made of veneers". They are recorded here as captured page furniture rather than as demand figures, because they are labels on a screen and carry no volume of their own.

That an answer box appeared here at all is written down in two separate stored files rather than one. The stored capture contains an ai_overview block at the top of the page, and the keyword file built from a different commercial tool carries a flag for the same term saying an AI overview was seen. Whether the two tools draw on the same underlying crawl is recorded in neither file, so the second is reported here as a second reading and not as independent confirmation. The same capture also records the shape of the page around it: five result features in total, listed as an AI overview, a People also ask box, images, related searches and video, with ninety-four organic results captured out of the total the engine reported. None of those counts is a claim about dentistry: they describe one page of search results on one day.

How typical this one result is can be bounded, and the bound comes from our own inventory of stored search-result captures dated 5 August 2026, which our evidence audit page has not yet turned into a published audit. Of sixty-five stored files, sixty-two were parsed and fifty-seven of those carried an AI Overview; twenty-six of the sixty-two parsed files were captured for the United Kingdom, and the domains cited across all of them number one hundred and seventy-eight. The inventory keeps no separate count of how many of the fifty-seven were British, so none is given here. A single capture cannot show whether an answer box changed last week, and no trend is claimed from one file. Whether the answer box for this query still names the same two material families today is not something a stored file can settle, and this page does not pretend otherwise.

How is this question searched in the UK?

Demand for this question was measured once and written down before the page was planned, and our methodology page requires us to state the ceiling of our own tools, which is what this section does. The term what are turkey teeth made of is recorded at 140 searches a month in the United Kingdom, with a keyword difficulty of 15 and a cost-per-click of 1.1, in the stored keyword universe file for English. The row came from a question-mining call seeded with the phrase turkey teeth, and the tool's own intent label for it is informational.

One tool produced that figure and the record says so. The second-measurement field on this row is empty, so the number stands on a single reading rather than a confirmed one, and no fresh call was made when the plan was written because the account key was returning an authorisation error at the time. Our methodology page logs a source we could not reach instead of slotting in a substitute and calling the two the same thing. The volume therefore rests on a stored August 2026 export rather than on a live query.

Why this question was chosen over louder ones is recorded as a score rather than as a judgement. Our methodology page marks what we gathered and counted ourselves as our own measurement with the method set out, and this method sits in our keyword target file for the United Kingdom, not on any page of this site. That file scores each target on four weighted components, and this term reaches 0.678 out of one: volume contributes 0.489 on a logarithmic scale, intent contributes the full 1, proximity to a usable source contributes 0.5, and measured opportunity in generated answers contributes 0.9. The last of those four is among the higher readings in this set, though two other terms score above it, and the file records that it was read off the stored search-result capture for this exact phrase rather than estimated. Eight of the twenty terms carry that component at all; on the other twelve it was left unmeasured rather than entered as a zero.

Where this term sits among the others is a matter of arithmetic in the same file. Twenty United Kingdom terms were measured for the English plan, all twenty carried a volume figure, and their measured volumes add to 42,290 searches a month; this one accounts for a small fraction of that total and ties for sixth of the twenty by score with a much larger term. Our methodology page requires the sample to be chosen before any result is seen, and this file ranks by score rather than by volume so that a large commercial term cannot outrank a smaller question named sources can actually answer.

What people appear to be asking under this phrase was written down as three core questions when the target was planned, and the same file keeps that list as a record of intent rather than as a finding. They are: which material these coverings are made from, what the difference is between a veneer and a crown, and how much of the tooth is prepared. This page answers each from a named source or records that none does. The plan file also carried a verdict against this term reading source needed, and that verdict was set when no document in the corpus named a crown or veneer material at all.

Three limits belong beside these figures, and stating them is the ceiling our methodology page asks us to report. Search volumes are estimates produced by a commercial tool and not counts of people, so the number 140 describes an instrument's output and not a queue of patients. The stored export predates this page by about two weeks and was not refreshed. And family-level totals from a second tool were deliberately left out of the score, because the same keyword file records that figures from the two tools are not comparable and that averaging them would produce a number neither tool measured.

Where does this page stop?

Our editorial standards page sets the boundary this section records, and the boundary is narrow on purpose. This page quotes named sources on what crowns and veneers are made of and how they are prepared. It does not rank clinics, recommend a dentist, quote a price, or tell any reader which material is right for their own teeth. We are not a clinic, an agency or a booking service, and nothing here should be read as a treatment plan. Where a source stops, this page stops with it rather than continuing in our own voice.

The largest gap on this page is the one its own title admits. Published descriptions of crown and veneer materials are written without reference to any country, so no source quoted here names a material used in Turkey, in the United Kingdom, or anywhere else in particular. That silence is recorded here as silence rather than filled in. A patient who wants to know what was fitted in their own mouth needs their treatment record and an examination, and the honest answer this page can give is which materials are named in general descriptions of these two devices.

Three sections here rest on sources with declared limits, and those limits travel with them. The professional-body survey reports what dentists observed rather than how often patients are affected. The peer-reviewed article that writes down the popular phrase excludes treatment abroad from its own scope in its own words. The generated answer quoted in the AI Overview section is the object of a measurement rather than a source of evidence, because a figure produced by a language model is one of the things our evidence audit page says does not count. None of the three is being asked here to support a claim it does not make.

Questions this page deliberately leaves alone have pages of their own or no answer yet. How long crowns and veneers last is a separate question, and no source quoted on this page answers it. What treatment costs, and who is responsible when something needs putting right, are separate questions with separate sources. Our corrections page is where any figure quoted here will be changed if it turns out to be wrong, and changes are logged there rather than edited away in silence.

One overlap is declared here rather than left to be noticed. The same NHS document supplies the material sentences on this page and on other pages of this site that deal with veneers and with named ceramics, because a single guide happens to carry the crown description, the veneer description and the preparation sentences together. That reuse is written down here rather than hidden, and the risk it creates is that two pages end up answering the same question in different words. Where those pages differ from this one, they differ in what they are asking of the same document, not in what the document says.

One limit belongs in the open, and it is measured. A named medical editor has been appointed, and the written, dated sign-off behind that name covers this page along with the rest of the site. The condition this page did not meet has since been met: its blocks are classified in our passage table — the table that carries the evidence class of each passage, and from which a page's own class is derived — and nineteen of them are readings of ours rather than quotations, which our build will not publish without a page-by-page clinician review line recorded against them. That signature was written on 3 September 2026; the date sits in the record and not on the page. What would change the answer given here is a first-tier source that names materials by country or by clinic, measured rather than asserted. No such source is quoted on this page, and until one exists the answer stays at the level the published descriptions of crowns and veneers actually reach.