Evidence and sources

Last updated 25 August 2026 · How we verify prices

Two different kinds of claim appear on this site, and they rest on two different kinds of source. Prices are ours — read from the fee guides practices publish themselves. Anything about how well a treatment works is not ours, and comes from independent peer-reviewed research, cited here so you can check it rather than take our word for it.

Our own data

London dental prices, August 2026. Compiled by reading 759 London practice websites in full. 228 of them publish prices we can use. From 6,888 price lines we discard “from” prices, ambiguous readings and implausible figures, then take the middle half across practices.

Published open under CC BY 4.0 · CSV · JSON · The figures · The method

Peer-reviewed research we cite

Each of these sits on the guide it informs. All but the NICE guideline are open access under CC BY 4.0, which permits reproduction with attribution; the NICE guideline is cited and linked rather than reproduced, as its terms require.

Dental implants

Across 158,824 implants placed in 53,874 patients, 97.79% were still in place. The failure rate was 2.21%.

Most failures happened in the first year and became rarer after that. Implants carrying a removable denture failed far more often (9.32%) than those carrying a fixed crown or bridge (3.74%), and upper molars and upper front teeth failed at roughly double the rate of other positions.

Used on dental implants guide

Root canal treatment

Of 598 root-treated teeth followed for up to 37 years, 97% were still in the mouth at 10 years, 81% at 20 years and 76% at 30.

Two things measurably changed the odds. Wearing a night guard cut the risk of losing the tooth (odds ratio 0.34), while a cast metal post roughly doubled it (2.14). Deep gum pockets and an existing infection at the root tip before treatment both worsened the outlook — which is why the state of the gum matters as much as the root filling.

Used on root canal treatment guide

Crowns

562 zirconia restorations were followed in a general dental practice for 15 years. By the end, 28.33% had failed.

Roughly one crown in four does not reach fifteen years, which is worth knowing before you treat a crown as permanent. Crowns fitted onto implants ran into more complications than crowns on natural teeth.

Used on crowns guide

Clear aligners

Pooling seven randomised trials covering 402 patients found no significant difference in pain between clear aligners and fixed braces, and no difference in quality of life.

Aligners scored better on two specific measures of final tooth position. Treatment time showed no consistent pattern — one trial found Invisalign took significantly longer than braces. The comfort advantage aligners are marketed on did not show up in the pooled results.

Used on clear aligners guide

How often to have a check-up

NICE does not recommend a six-monthly check-up for everyone. It recommends an interval set individually between 3 and 24 months, based on your risk of dental disease.

The 2018 surveillance review found no evidence that a 24-month interval harmed the oral health of low-risk adults. If a practice recalls you every six months as a matter of routine, it is reasonable to ask what your risk assessment was — the answer changes how much you spend over a decade.

Used on how often to have a check-up guide

Teeth whitening

In-office, at-home and combined whitening all produce real colour change. At-home whitening held its result longest.

High-concentration in-office peroxide was linked to colour returning sooner — within six months — than with a completed at-home course. Combining both approaches offered no additional benefit and may increase sensitivity. A second review found shop-bought products vary enormously by format: concentrated paint-on gels changed colour perceptibly, while mouthrinses barely moved the shade.

Used on teeth whitening guide

Fillings

The faster “bulk-fill” technique lasts as well as the slower layered one.

Pooling nine randomised trials covering 632 restorations found no statistically significant difference in failure rates between bulk-fill and incrementally layered composites, over both short and longer follow-up. Marginal adaptation, discolouration and post-operative sensitivity were comparable. The practical difference is chair time, not durability — so a premium charged for either technique should come with an explanation.

Used on fillings guide

Dentures

Between half and four in five denture wearers report being satisfied — and what you are fitted with changes that more than what you pay.

A review of 35 studies found satisfaction ranging from 50% to 81%. Flexible and thermoplastic resin dentures scored higher than traditional metal ones, and designs bounded by teeth on both sides did better than free-end designs. Pain, appearance and difficulty keeping them clean were the main complaints. People who had worn a denture before were more satisfied than first-time wearers.

Used on dentures guide

Scale and polish

A routine scale and polish every six months does not keep gums healthier than having one when your dentist judges it necessary.

Scheduled scale and polish did not reduce the early signs of gum disease more than treatment given as needed. It does remove more calculus — six-monthly more than twelve-monthly, on high-certainty evidence — but the clinical importance of that difference is uncertain. Patients did report their teeth felt cleaner. This matters commercially: hygienist appointments are the second most commonly published price in London, on 172 practice websites.

Used on scale and polish guide

Official registers and datasets
SourceWhat we take from itLicence
Care Quality Commission register Which practices exist, where they are, and their registration status. The starting list for everything on this site. Open Government Licence v3.0
NHS Organisation Data Service — General Dental Practices Which of our listed practices hold an active NHS General Dental Services contract (shown as the "NHS & Private" badge). Matched by postcode and house number against our own address data — a practice's registered NHS name is often not its trading name, so we don't match on name. A contract is not the same as an open list; we link to our own guide on checking current availability. Downloaded 26 August 2026. Open Government Licence
NHS — Teeth whitening The clinical baseline for whitening, and the warning that treatment outside a dental setting can harm teeth and gums. Last reviewed 19 August 2025. Crown copyright — Open Government Licence via NHS syndication
NHS Business Services Authority — Dental statistics, England 2024/25 Official NHS dental activity and counts of patients seen, used for context on NHS access. Open Government Licence
Department of Health and Social Care — NHS dental charges The Band 1, 2 and 3 charges, which are set nationally and identical everywhere in England. Open Government Licence
General Dental Council register Who is legally allowed to practise dentistry, including who may carry out tooth whitening. GDC — searched and linked, not reproduced

NHS ODS match coverage, 26 August 2026: 1,476 of 2,409 practices confirmed with an active contract, 38 confirmed with a lapsed one, 736 with no match found at their postcode, and 159 we couldn't check because our own address data for that practice is incomplete. We don't guess on the remainder — no match shown means no match confirmed, not "not NHS."

What we do not do
Citing us

Our price figures are free to reuse, commercially or not, under CC BY 4.0. Suggested form:

DentistFees. London dental prices, August 2026. https://dentistfees.co.uk/prices/

Journalists and researchers wanting the underlying practice-level data: Press & data.

Where a licence is named above, it is the licence stated by the publisher at the time we read the work. Licences and guideline terms change — the links go to the current version. If you believe a source is misattributed or a licence has changed, email corrections@dentistfees.co.uk and we will fix it.