- Dental hygienists focus on preventing and treating gum disease, cleaning teeth and helping you look after your mouth at home. Dental therapists can also do some fillings and treat baby teeth.
- In the UK, the General Dental Council (GDC) says hygienists and therapists can see you without a referral from a dentist, for everything within their role except tooth whitening. Not every practice offers this.
- In Australia, the Dental Board removed the rule that hygienists and therapists must work in a formal relationship with a dentist in 2020, though a practice may still have its own rules.
- In the US, what hygienists can do without a dentist is set by each state, and varies.
- How often you need a clean depends on your gums. A Cochrane review found routine cleans made little difference to gum health in low-risk adults.
This guide explains what hygienists and therapists do, as regulators and professional bodies define the roles, and what that means when you book. For the check-up itself, see dental check-ups.
What does a dental hygienist do?
UK
The General Dental Council (GDC), which regulates all UK dental professionals, says hygienists play a key role in preventing oral diseases, treating periodontal disease (gum disease that affects the tissues supporting the teeth) and giving oral health advice. Tasks it lists include:
- oral health education and screening, with a focus on prevention
- examinations, diagnosis and care planning within their scope and competence, referring you on when needed
- taking and interpreting X-rays within their scope
- managing gum disease, and helping prevent decay, including fissure sealants (a protective coating on the grooves of back teeth)
- advice on preventing tooth wear, and care and maintenance of dental implants
The GDC says hygienists do not do permanent fillings, crowns, orthodontic treatment (braces) or splints, and do not take teeth out.
Australia
The Australian Government Department of Health says dental hygienists use preventive, educational and therapeutic methods to help prevent and control oral disease, providing assessment, diagnosis, treatment, management and education. The Australian Dental Association adds check-ups, professional cleaning and fluoride treatments.
US
The American Dental Association (ADA) says hygienists screen patients (including taking X-rays), teach oral hygiene, apply fluoride and sealants, counsel on nutrition, and remove plaque and calculus (tartar, hardened plaque). It says hygienists must pass a national written exam and a state licensing exam.
Dental therapists and oral health therapists
UK: the GDC says dental therapists can do everything a hygienist does, and also fill teeth (both baby and adult teeth), and on baby teeth carry out some nerve treatment, extractions and pre-formed crowns. They do not take out adult teeth, do nerve treatment on adult teeth, make crowns or bridges, or provide orthodontic treatment.
Australia: the Department of Health says dental therapists generally treat patients under 18 unless they have completed further training. Oral health therapists have dual qualifications in dental therapy and dental hygiene and may work as a hygienist, a therapist or both. The Department lists fillings, extractions and gum treatment among their services, and says that without further training they too treat under-18s.
In both countries, what an individual can do also depends on their own training. The Dental Board of Australia says a practitioner's scope depends on their education, training, experience and competence, so it can differ between two people with the same title. To check a professional's registration, see finding a dentist.
Can I see a hygienist without seeing a dentist first?
This is called direct access. The answer depends on where you live.
UK
The GDC says hygienists and therapists can carry out their full scope of practice without a referral from a dentist, except tooth whitening. Before 2013, a dentist's referral was needed. Tooth whitening still needs a prescription from a dentist, with a dentist on the premises supervising the first treatment (see stained teeth).
The GDC says direct access is an option, not a requirement, so not every hygienist or practice offers it. Practices that do should make clear what is available, how to book, and what happens if you need care the hygienist or therapist cannot provide.
For NHS care in England, the NHS Business Services Authority says dental therapists and other dental care professionals working within their scope of practice can open an NHS course of treatment, and the NHS claim form has fields for them to record the care they provide. Ask the practice whether you can book with a hygienist directly.
Australia
The Dental Board of Australia says that from 1 July 2020 it removed the requirement for dental hygienists, dental therapists and oral health therapists to practise within a "structured professional relationship" with a dentist. It says no dentist needs to be present for care within a practitioner's scope, though a workplace may require one. healthdirect Australia says a check-up may be done by a dentist, hygienist, oral health therapist or dental therapist.
US
Rules are set state by state. The American Dental Hygienists' Association, the professional body for US hygienists, defines direct access as a hygienist starting treatment based on their own assessment, without a dentist's specific authorisation and without a dentist present. It counts 43 states that permitted direct access in 2025. The American Dental Association's 2025 summary of state rules says Alabama is the only state that still requires a dentist to directly supervise hygienists for every procedure. Check with your state dental board or the practice.
What happens at a hygiene appointment?
The NHS describes a scale and polish as the hygienist cleaning your teeth, carefully removing the plaque and tartar that build up on them. healthdirect says professional equipment is used to remove plaque and calculus, which cannot be removed by brushing at home, and that your teeth will be polished and a fluoride treatment applied. It suggests telling the practitioner before the cleaning starts if your teeth are very sensitive.
The ADA says the dentist or hygienist will ask about your recent medical history, and the hygienist may use special instruments to check your gums for gum disease. The GDC and the ADA both list teaching you how to look after your teeth and gums among a hygienist's tasks.
If your gum disease is serious, the NHS says you may need deep cleaning under your gums. Gum disease treatment explains the steps.
How often should I see a hygienist?
There is no single interval, and sources put the emphasis differently.
- Australian Dental Association: most people may need a professional clean every 6 or 12 months. People with a lot of calculus, difficulty cleaning at home or gum disease may need it more often: with periodontitis, as often as every 3 months.
- healthdirect: a check-up, which includes a clean, every 6 to 12 months.
- American Dental Association: there is no one-size-fits-all answer; some people need to visit once or twice a year, and others more often.
- NHS: for early gum disease, your dentist may advise a clean by a hygienist. The NHS advises regular check-ups with a dentist and hygienist, especially in pregnancy or with type 2 diabetes.
What the evidence says about routine cleans
A 2018 Cochrane review looked at routine scale and polish in two UK studies of 1,711 adults without severe gum disease who attended their dentist regularly. Over 2 to 3 years, it found little or no difference in gum inflammation, plaque or pocket depths between 6-monthly or 12-monthly cleans and no scheduled cleans, and was highly confident about the finding on gum inflammation. Routine cleans slightly reduced tartar, and people having them felt their teeth were cleaner (low confidence).
So the Australian Dental Association suggests most people have a clean every 6 or 12 months, while Cochrane found routine cleans did little for gum health in low-risk adults. The review did not cover people with severe gum disease, who the Australian Dental Association says cannot be treated without professional cleaning. Ask your dental team how often you need one, and why.
What does it cost?
In England, the NHS says scaling is available on the NHS if your dental professional says it is clinically needed, and can be done by a hygienist or dental therapist; otherwise you pay privately. For other countries, see dental costs and where to get help.
- If a hygienist or therapist refers you to a dentist, the GDC says the reason should be explained, and so should the possible consequences if you decline.
- See a dentist if your gums bleed when you brush, are painful and swollen, or you have bad breath, which the NHS lists as signs of gum disease.
- The NHS says to ask for an urgent dental appointment if you have gum disease with very sore and swollen gums, teeth becoming loose or falling out, ulcers or red patches in your mouth, or a lump in your mouth or on your lip. If you cannot get one, call 111 (or your local equivalent).
Frequently asked questions
Can a hygienist fill a tooth?
In the UK, no: the GDC says hygienists do not do permanent fillings, but dental therapists can. In Australia, the Department of Health lists fillings among the services of oral health therapists.
Do I still need to see a dentist?
The GDC says dentists are the only members of the dental team who can carry out the full range of dental treatments, and that hygienists and therapists must refer you when you need care outside their role.
Is a scale and polish bad for my teeth?
The Cochrane review notes that scaling has been associated with side effects such as damage to tooth surfaces and sensitivity, but the studies it included did not measure them. Tell the hygienist if your teeth are sensitive.
Sources
- Direct access, General Dental Council, accessed September 2026
- Guidance on scope of practice (effective 1 November 2025), General Dental Council, accessed September 2026
- Promoting the more effective use of skill mix, NHS Business Services Authority, accessed September 2026
- Dental treatments, NHS, accessed September 2026
- What is included in each NHS dental band charge, NHS, accessed September 2026
- Gum disease, NHS, accessed September 2026
- About dentists and dental practitioners, Australian Government Department of Health, Disability and Ageing, accessed September 2026
- Dental hygienist, dental therapist and oral health therapist, Dental Board of Australia, accessed September 2026
- FAQs: revised scope of practice registration standard, Dental Board of Australia, accessed September 2026
- Your dental team, Australian Dental Association, accessed September 2026
- Professional teeth cleaning (factsheet), Australian Dental Association, accessed September 2026
- Dental check-up, healthdirect Australia, accessed September 2026
- Dental care and teeth cleaning, healthdirect Australia, accessed September 2026
- Dental hygienist, American Dental Association, accessed September 2026
- Emerging and current models to address dental team workforce (2025), American Dental Association, accessed September 2026
- Common questions about going to the dentist, American Dental Association (MouthHealthy), accessed September 2026
- Direct access, American Dental Hygienists' Association, accessed September 2026
- Routine scale and polish for periodontal health in adults, Cochrane (Lamont and others, 2018), accessed September 2026
This article is general information about oral health. It is not a diagnosis or a substitute for advice from a dentist or doctor who knows your situation. If you have pain, swelling, bleeding that does not settle, or a problem that is getting worse, see a dental professional. In an emergency, contact your local emergency service.