Dental deserts: the contract behind the NHS dentistry crisis

Ask people in Britain what has gone wrong with the health service and dentistry comes up fast. Not because the clinical care is poor, but because a great many people cannot get any of it. Lists closed, appointments went to whoever rang first on the right morning, and in some towns the nearest practice taking NHS adults sits an hour away. Reporting through the early 2020s repeatedly found that the large majority of practices were not accepting new adult NHS patients.

What makes this a proper interview topic rather than a grumble is that the cause is unusually legible. NHS dentistry in England is not a service the state runs. It is care the state buys from independent businesses under a contract, and that contract has paid the same way since 2006. Read the payment formula and the access crisis stops looking like bad luck. It starts looking like arithmetic.

Before 2006, NHS dentists in England were paid per item of treatment: a fee for the examination, a fee for each filling, a fee for the extraction. It had obvious flaws. It rewarded drilling over prevention and it made national spending impossible to forecast. The replacement, the General Dental Services contract, swapped items for activity. Each practice signed for an annual contract value and, in return, promised to deliver a set number of Units of Dental Activity.

A UDA is not an hour, a tooth or a procedure. It is a credit earned by completing a course of treatment, and the credit depends only on which band that course falls into. Hit your UDA target and you keep your contract value. Fall short beyond a tolerance and the commissioner claws money back. Overshoot and you are generally not paid for the extra. That the money is fixed and the activity is the variable is most of this topic; our guide to how the NHS works puts the same logic in its wider setting.

Now read the third column again with chair time in mind. A Band 2a course earns three UDAs whether it is one straightforward filling or a long appointment on an anxious patient with a complicated medical history. A Band 3 course earns twelve whether it is a single crown on a cooperative mouth or a set of dentures that takes repeated visits, laboratory work and remakes. The unit rewards completing courses. It is close to blind to the difficulty of the mouth in front of you.

Follow that through and the incentives point one way. The efficient NHS course of treatment is a short one on a healthy mouth. The patient who has not seen a dentist in a decade, who needs several visits and a plan built over months, is the patient who makes the annual target hardest to hit. The 2022 changes, which lifted the count for courses involving three or more teeth and for molar endodontics, were an admission that the original bands were too blunt. They narrowed the problem. They did not remove it.

When the sums stop working, an independent practice has options the NHS does not control. It can reduce its NHS commitment at the next negotiation, hand the contract back entirely, or convert to private and hygienist-led care. Each is a rational business decision, and each removes NHS capacity from a place that may have had little to spare. Because NHS dentistry has no registered patient list in the way general practice does, there is no formal roll of the people left behind, which is part of why the loss is hard to see in national figures and obvious on a local high street.

The result is what the press now calls a dental desert: a district where NHS provision has thinned to the point that ordinary access is a matter of luck, travel or money. It is not spread evenly. Coastal towns, former industrial areas and rural districts fare worst, which is the same pattern that shows up in almost every measure of health inequality. Tooth decay is very largely preventable, and it has for years been among the most common reasons young children in England are admitted to hospital for a general anaesthetic.

The new patient premium is the clearest example of policy working with the contract rather than replacing it. As of 2026 it pays a practice an extra sum, set at roughly £15 to £50 depending on the patient’s needs when the plan was published, for treating someone who has not seen an NHS dentist in two years. The logic is clean enough: if new patients are the ones practices can least afford to take, pay more for them.

The profession’s objection is equally clean. A practice already delivering its full UDA target has no spare chair time to sell, so a premium adds money without adding capacity. And if payment follows new patients, the incentive tilts against the loyal patient who has attended every year. The British Dental Association’s position through this period has been that the contract needs replacing rather than topping up. Whether the premium actually moved access is genuinely open, and a candidate who says "the early evidence looked mixed, and I would want to see this year’s figures" stands on firmer ground than one who declares it a triumph or a failure.

So what would fix it? Three answers dominate the argument, and the useful move at interview is to lay them out before choosing between them. The first says the money is simply too thin: the ring-fenced dental budget in England is roughly £3 billion a year, it has not kept pace with staff and laboratory costs, and practices are being asked to deliver NHS care at rates that no longer cover doing it well. The second says money is not the binding constraint, the formula is. The third says both miss the workforce: even a well-funded, well-designed contract needs enough clinicians willing to work under it, in the places that need them most.

Each answer implies a different reform and each gives something up. That is the shape of a strong response. Not a verdict, but the trade-off drawn clearly enough that the interviewer can see you know what every option costs.

None of this is abstract if you are about to start a dental degree. Foundation training after graduation is spent in an NHS practice, and most practices in England are mixed: NHS courses of treatment running alongside private ones in the same building, often for the same patients. Mixed practice is where the contract’s pressures turn into a daily clinical decision about which work is offered under the NHS, which is offered privately, and how that choice is explained across the chair.

The ethical line is not that private dentistry is wrong. It is that a patient must be given enough information to choose freely, and must never be steered towards paying by a vague explanation or by an NHS option quietly left off the table. Consent and non-maleficence do real work here, so it is worth rehearsing this argument next to the four pillars of medical ethics. Interviewers raise mixed practice because it is exactly where a business model meets a professional duty, and they want to hear you notice the tension rather than pretend it is not there.

Skill mix is the quietest of the three answers and possibly the most consequential. Dental therapists can carry out much of what fills a Band 1 or Band 2 course — examinations, fillings, extraction of deciduous teeth, prevention — and patients have been able to see hygienists and therapists directly, without a dentist’s prescription, since the General Dental Council opened direct access in 2013. Changes in the mid-2020s went further, letting therapists supply and administer certain medicines under exemptions.

The obstacle has been the contract again. Payment flows to the practice for completed courses of treatment, and the rules around who may open and close a course have not always made it straightforward to deploy a therapist as anything other than an assistant to a dentist’s list. Any serious plan to widen access runs through fixing that plumbing, which is why "train more dentists" is a slower and far more expensive answer than it first sounds.

This topic almost never arrives named. It arrives as:

• "Why do you think people find it so hard to get an NHS dentist?"
• "What do you know about how NHS dentists are paid?"
• "Would you want to work in the NHS, privately, or both?"
• "How would you improve access to NHS dental care?"
• A station where you explain to an unhappy patient why the treatment they want is not available to them on the NHS today.

The depth expected is not encyclopaedic. A panel wants four things: that you can name the 2006 contract and the UDA as its unit; that you can state the same-pay-for-different-work problem in one sentence; that you know one policy response and one fair criticism of it; and that you hold a position of your own that survives a follow-up. Then say it out loud before the day. Our interview preparation pages are built for that, and the dental school guides tell you which of your schools run panels and which run MMI circuits.

Headlines about dental deserts will be replaced by other headlines. The contract will not go away so easily: whatever eventually succeeds it, the question of how you pay a clinician for care whose value is mostly prevention will still be unsolved by the time you qualify. That is why this topic rewards mechanism over memory, and why it keeps working as an answer long after the news that prompted it has gone quiet. Work through the rest of the system on our interview reading path, then do the part that actually moves a score: say the answer aloud, to someone who will interrupt you.