For most of the past half century, getting a crown in Britain meant two appointments and a fortnight in between. A tray of putty, a temporary crown glued on with something deliberately weak, a parcel posted to a laboratory somewhere, and a second numbing session to fit the finished restoration. If the shade was wrong, the whole cycle started again.
A growing number of UK practices now do the laboratory part themselves, scanning the tooth digitally and milling or printing the restoration on the premises. Some fit a permanent crown the same morning. It is genuinely useful technology, and it is also marketed with more certainty than the evidence supports. This is what it does, what it does not do, and what to ask before you pay for it.
From Putty And Post To Scan And Mill
The traditional route sends information out of the building. A physical impression records the prepared tooth, travels to a dental laboratory, and comes back as a crown days or weeks later.
The in-practice route keeps that loop inside the surgery. An intraoral scanner captures the tooth optically, design software builds the restoration on screen, and a milling unit cuts it from a solid ceramic block while you wait. The same digital file can drive a 3D printer for things that are not ceramic, such as splints and surgical guides.
Most people arriving for a crown want the same thing, which is to get a perfect, natural smile that nobody else notices. Understanding how the restoration is actually made is the quickest way to work out whether a given practice can deliver that for your particular tooth.
| Traditional external laboratory | In-practice digital workflow | |
| Impression | Tray and putty | Optical intraoral scan |
| Typical wait | One to three weeks | Same day to a few days |
| Temporary crown | Usually needed | Often not needed |
| Shade and fit changes | Return visit, parcel back to lab | Adjusted in the chair |
Digital Scans Instead Of Impression Trays
The scanner is the part patients notice. A wand the size of an electric toothbrush head is passed around the mouth, building a 3D model on screen in a few minutes. No tray, no setting time, and far less trouble for people with a strong gag reflex.
Two honest caveats. First, scanning is not automatically more accurate than a well-taken conventional impression. The research consistently shows digital scanning performing well for single units and short spans, with the picture less settled for full-arch work, where small errors accumulate along the arch. For a single crown, which is what most people are having, that distinction rarely matters.
Second, the scan only records what the dentist has prepared. If the margin of the preparation is unclear or sitting in bleeding gum, the scan captures that confusion in high resolution. Technique still decides the outcome.
The real advantage is the feedback loop. The dentist can magnify the preparation on screen, spot a margin problem while you are still in the chair, and fix it immediately rather than discovering it when the crown arrives and does not seat.
Milling A Crown In The Practice
Chairside milling units cut the restoration from a factory-made block of lithium disilicate or zirconia using diamond burs, then fire or sinter it to full strength.
The materials argument in favour is reasonable. An industrially pressed ceramic block has a more consistent internal structure than a hand-layered porcelain build-up, with fewer of the voids and inclusions that start cracks. Monolithic restorations, which are cut from a single block rather than a core with porcelain layered on top, also avoid the most common failure in traditional crowns, which is the veneering porcelain chipping away from its substructure.
The model is not unique to Britain. Practices everywhere from the Home Counties to Alaska now advertise complete in-house workflows, including a dentist in anchorage ak running scanning, milling and printing on site.
Printing What Cannot Be Milled
Milling suits hard ceramics. Resin-based items are generally printed instead, layer by layer, from the same digital file.
In practice that means night guards and splints for people who grind, surgical guides that position an implant drill according to the plan, diagnostic mock-ups that let you see a proposed cosmetic result before anything irreversible happens, and models for checking fit.
The mock-up deserves particular attention if you are considering veneers or a larger cosmetic case. Seeing a trial version in your own mouth, before enamel is removed, is one of the most useful safeguards available to a patient, and it costs far less than regretting the outcome.
Matching The Colour While You Are Still There
Shade matching is where in-house work has an obvious edge. Teeth are not one colour. They are translucent at the edge, more saturated at the neck, and full of small characterisations that a laboratory working from photographs has to infer.
When the technician or dentist can stain and glaze with the patient present, under the same light, in front of the actual neighbouring teeth, the match is usually better. Clinics built around this workflow, such as Emerald Peak Dental anchorage, describe doing exactly that, with the restoration going back into a small furnace in the surgery for adjustment and refiring.
For a back tooth this matters little. For an upper front tooth next to a natural neighbour, it matters a great deal, and some of the best results still come from an experienced ceramist layering porcelain by hand over several days. A practice that acknowledges this is being straight with you.
What The Evidence Says About How Long They Last
Marketing copy likes the word “decades”. The clinical literature is more measured, and more useful.
A prospective trial following chairside-milled monolithic lithium disilicate crowns on back teeth reported a survival rate of 83.5% at ten years, with around 71% free of any complication. A follow-up of the same cohort at fifteen years found survival of about 80%, with most failures biological rather than the ceramic breaking.
Broader reviews support the same conclusion. An overview of systematic reviews on lithium disilicate single crowns found short and medium term survival of 95% to 100%, comparable with traditional metal-ceramic crowns, and a meta-analysis comparing CAD/CAM and conventional fabrication found no meaningful disadvantage for the digital route. For multi-unit bridges the figures are lower, as a systematic review of CAD/CAM all-ceramic fixed dental prostheses sets out.
The fair summary: a well-made same-day crown performs about as well as a well-made laboratory crown. Neither is permanent. Most failures involve the tooth underneath rather than the restoration on top, which is why the state of your gums and your grinding habit predict longevity better than the manufacturing method does.
NHS Question
This is where UK readers need different information from an American audience.
Crowns, bridges and dentures sit in Band 3 of the NHS charge system in England, and one charge covers the whole course of treatment however many items it includes. The NHS publishes the current band charges on its guide to what you pay for NHS dental treatment, and the figures change each April, with different arrangements in Scotland, Wales and Northern Ireland.
NHS crowns are made the traditional way, in a laboratory, and the material is chosen on clinical grounds rather than patient preference, which is why back teeth often get metal or metal-ceramic. Same-day chairside crowns are almost always a private option, because the economics of a milling unit do not fit NHS banding.
That makes the honest comparison a financial one rather than a clinical one. An NHS crown is not a worse crown. It is a crown that takes two visits, comes with a temporary in between, and may not be white at the back. Paying privately buys speed, material choice and appearance, not a fundamentally better outcome. Given how hard NHS dental access has become in parts of the UK, plenty of people are choosing private care by default rather than by preference, which makes it more important to know what you are buying.
Checking A Practice Before You Book
Every dentist, hygienist, therapist, dental nurse and dental technician working in the UK must be on the General Dental Council register, and you can search the GDC register free by name or registration number in about two minutes. The practice itself should also be registered with the relevant inspectorate, which is the Care Quality Commission in England.
It is worth knowing who physically makes your restoration. The GDC’s scope of practice guidance sets out what each role in the dental team can do, and dental technicians are registered professionals in their own right. A practice with an in-house lab should be able to tell you whether a registered technician is operating it or whether the dentist does the design and finishing.
What Same-Day Technology Does Not Fix
A crown is a cap on a problem, and the technology does not change the problem.
If you grind your teeth, ceramic will chip whoever makes it, and you probably need a guard alongside it. If you have active gum disease, no restoration will outlive the support underneath it. If the tooth has a deep crack, the crown may be holding together something that is already failing. And complex front-tooth aesthetics, particularly a single central incisor next to a natural one, remain the hardest thing in restorative dentistry regardless of the machinery involved.
Speed also carries its own small risk. Two visits give the gum time to settle and the dentist time to reflect. On a difficult case, a practice that suggests slowing down is showing judgement, not inefficiency.
Questions Worth Asking
- Is this restoration milled here, printed here, or sent to a laboratory, and who does the design?
- What material will it be, and why that one for this tooth?
- How many visits, and will I leave with a temporary?
- What is the guarantee if it chips or debonds, and what does it exclude?
- Can I see a mock-up before anything irreversible happens, if the tooth shows when I smile?
- What would the NHS option be for this tooth, and what is the actual difference?
- Who is the registered technician involved, and what is their GDC number?
Frequently Asked Questions
Are Same-Day Crowns As Strong As Laboratory Crowns?
The published survival figures are broadly comparable, with chairside milled monolithic lithium disilicate crowns surviving at around 83.5% at ten years in one prospective trial. Monolithic designs avoid the chipping of veneering porcelain seen in layered crowns. Strength also depends on tooth preparation, cementation and your bite, not just the block.
Can I Get A Same-Day Crown On The NHS?
Rarely. NHS crowns fall in Band 3 and are usually made in an external laboratory across two appointments. Chairside milling is generally offered privately, so expect a private fee if you want a crown fitted in one visit.
Does A Digital Scan Hurt Or Trigger Gagging?
It should do neither. The wand is passed around the mouth and does not set like putty, which is why scanning suits patients with a strong gag reflex. You may be asked to hold still in short bursts while sections are captured.
How Long Do Dental Crowns Last In The UK?
Ten to fifteen years is a realistic expectation for a well-made crown on a healthy tooth, with published cohorts showing around 80% survival at fifteen years. Longevity depends more on gum health, grinding and the condition of the tooth beneath than on how the crown was manufactured.
Is It Worth Travelling Further For A Practice With An In-House Lab?
Only if the convenience matters to you or you need the aesthetic control for a visible tooth. For a routine back-tooth crown, a good local dentist using a good laboratory produces an equally good result.
Sensible Summary
In-practice scanning, milling and printing have removed some genuinely unpleasant parts of restorative dentistry: the putty, the two-week wait, the temporary crown that falls off on a Saturday, and the shade that never quite matched.
What the technology has not changed is the part that decides the outcome. A crown is only as good as the preparation underneath it, the diagnosis that led to it, and the mouth it is placed into. Ask who is making it, what it is made from and what happens if it fails, and you will learn more about a practice than any list of equipment can tell you.
Disclaimer: This article is general information and not dental advice. It cannot account for your individual clinical situation. Discuss treatment options, materials and costs with a GDC-registered dentist before making decisions. NHS charges and availability change; check the NHS website for current figures.
References
- Rauch A, Reich S, Dalchau L, Schierz O. Clinical survival of chair-side generated monolithic lithium disilicate crowns: 10-year results. Clinical Oral Investigations. 2018;22(4):1763-1769. doi:10.1007/s00784-017-2271-3
- Rauch A, Reich S, Schierz O, et al. Long-term survival of monolithic tooth-supported lithium disilicate crowns fabricated using a chairside approach: 15-year results. PMC10329614. https://pmc.ncbi.nlm.nih.gov/articles/PMC10329614/
- Clinical outcomes and complications of tooth- and implant-supported lithium (di)silicate based single crowns: an overview of systematic reviews. Journal of Dentistry. 2025. https://www.sciencedirect.com/science/article/pii/S0300571225004488
- Clinical Outcomes of CAD/CAM (Lithium Disilicate and Zirconia) Based and Conventional Full Crowns and Fixed Partial Dentures: A Systematic Review and Meta-Analysis. PMC10199723. https://pmc.ncbi.nlm.nih.gov/articles/PMC10199723/
- Clinical Performance of CAD/CAM All-Ceramic Tooth-Supported Fixed Dental Prostheses: A Systematic Review and Meta-Analysis. PMC8161295. https://pmc.ncbi.nlm.nih.gov/articles/PMC8161295
- NHS. How Much Will I Pay for NHS Dental Treatment? Accessed 6 October 2026. https://www.nhs.uk/nhs-services/dentists/how-much-will-i-pay-for-nhs-dental-treatment/
- General Dental Council. Search the Registers. Accessed 6 October 2026. https://olr.gdc-uk.org/
- General Dental Council. Scope of Practice. Accessed 6 October 2026. https://www.gdc-uk.org/standards-guidance/standards-and-guidance/scope-of-practicex
