For decades, going to the dentist meant one thing: fixing problems once they had appeared. That is changing. Across London and the wider NHS, preventive dentistry, which means stopping decay and gum disease before they start, is moving to the centre of how care is planned and delivered.
In short: preventive dentistry means stopping tooth decay and gum disease before they start, through daily habits, fluoride, diet and regular risk-based check-ups, rather than only repairing damage afterwards. In 2026 it has moved to the centre of NHS policy, starting with a new prevention-first clinical standard for children, and London practices are increasingly built around it.
What is preventive dentistry?
Preventive dentistry covers everything done to keep teeth and gums healthy rather than to repair them: routine check-ups and risk assessments, hygienist visits, fluoride varnish, fissure sealants for children, and tailored advice on brushing, diet and habits like smoking that affect oral health.
The logic is simple economics as much as good medicine. A problem caught early, or prevented entirely, is cheaper, quicker and far less unpleasant to deal with than a filling, an extraction or an abscess. Prevention is also the foundation of NHS pricing: a Band 1 appointment (£27.90 in England from April 2026) exists precisely to catch problems before they become Band 2 or Band 3 ones.
From drill-and-fill to prevention-first
The clearest sign of the shift came in June 2026, when NHS England published its first complete clinical standard for children's oral health, replacing guidance dating back to 2018. It explicitly puts prevention first, calling for care that is minimally invasive and focused on early intervention, delivered in the most local, least complex setting appropriate for each child.
The profession welcomed it as a landmark. Oosh Devalia, president of the British Society of Paediatric Dentistry, called it a turning point.
This standard is a pivotal moment for children's oral health in England. For the first time, we have a single, coherent national document that supports every professional... It sets the benchmark not just for clinical care, but for equity, safety and accountability.
Oosh Devalia, president, British Society of Paediatric Dentistry
The urgency is hard to overstate. Tooth decay is the leading cause of hospital admission among five- to nine-year-olds in the UK, despite being very largely preventable. That single fact is why prevention has become such a priority, not only for children but as a model for how dentistry could work for everyone.
Prevention only works if you can get an appointment
There is an important caveat, and dentists have been quick to make it. A prevention-first approach depends on there being enough dental professionals to deliver it. Martyn Cobourne, dean of the Faculty of Dental Surgery at the Royal College of Surgeons of England, welcomed the renewed focus but sounded a note of realism.
These standards will only make a difference if there are enough dental professionals to deliver them... Without that, NHS dentistry will continue to struggle to meet demand.
Martyn Cobourne, dean, Faculty of Dental Surgery, RCS England
This is where prevention and access meet. In a city like London, where getting an NHS appointment can be hard, keeping your teeth healthy in the first place is not just good for you; it takes pressure off a stretched system. Every filling avoided is an appointment freed up for someone who needs urgent care.
Why London in particular?
London's dentists have been among those leading the conversation, with practices in South West London and elsewhere increasingly built around prevention rather than repair. It makes sense for the capital: a young, diverse and highly mobile population benefits from care that travels with good habits rather than depending on frequent visits, and prevention helps narrow the stark differences in oral health between the city's wealthier and more deprived areas.
Which daily habits actually protect your teeth?
Most of prevention is not high-tech at all: it is the daily routine your dentist keeps gently reminding you about:
- Brush for two minutes twice a day with a fluoride toothpaste.
- After brushing at night, spit rather than rinse, so the fluoride stays on your teeth and keeps working.
- Watch not just how much sugar you have but how often; the frequency of sugary snacks and drinks does the most damage.
- Keep up regular check-ups, because a dentist can spot decay or gum problems long before you feel anything, when they are far simpler and cheaper to treat.
These sound almost too simple to matter, but they are the foundation the entire prevention agenda rests on. Done consistently, they prevent the great majority of the problems that fill dental chairs.
How do I choose a prevention-focused practice in London?
If you are choosing a dentist in London, it is worth looking for one that takes prevention seriously. That might mean a practice that gives you tailored advice on brushing and diet, uses risk assessments to decide how often you really need to be seen, and involves a hygienist or therapist in your care, not just a dentist wielding a drill. A good practice will be as interested in keeping you out of the chair as in what they do once you are in it.
Prevention is having a moment for a good reason: it is better for patients, better for the NHS, and, done well, it means fewer fillings, fewer emergencies and fewer anxious appointments. If you would like help finding a practice in your area, our borough guides are a good starting point.
Frequently asked questions
What does preventive dentistry include?
Routine check-ups and risk assessments, hygienist appointments, fluoride varnish, fissure sealants for children's back teeth, and personalised advice on brushing, diet, smoking and alcohol. The aim is to stop decay and gum disease developing rather than treating them afterwards.
How often should I see a dentist?
It depends on your risk, not a fixed rule. NICE guidance recommends recall intervals from 3 to 24 months for adults and 3 to 12 months for children, set by your dentist based on your oral health. Low-risk adults may only need a check-up every one to two years.
Does the NHS cover preventive dental care?
Yes. A Band 1 course of treatment (£27.90 in England from April 2026) covers examination, X-rays, prevention advice, a scale and polish if clinically needed, and fluoride varnish. NHS dental care is free for under-18s.
What is the single best way to prevent tooth decay?
Brush twice a day for two minutes with fluoride toothpaste, and spit rather than rinse afterwards so the fluoride keeps working. Alongside that, cut down how often you have sugary food and drinks; frequency matters more than total amount.
Why is tooth decay still so common in children?
Largely because of frequent sugary snacks and drinks, inconsistent brushing and unequal access to dental care. Tooth decay remains the leading cause of hospital admission among five- to nine-year-olds in the UK, despite being very largely preventable.