Dental Hygienist & Therapist Interview Questions & Answers

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About this NHS interview question bank

To prepare for a dental hygienist and therapist NHS interview, expect questions on your GDC scope of practice, direct access and working to prescription, periodontal assessment and the BPE, prevention and behaviour change, local anaesthetic, children's restorative care, safeguarding, medical emergencies and infection control. Build short spoken answers around real patients from your training or practice, and know the GDC Standards for the Dental Team, the NHS values and the service you are applying to before you walk in.

This bank contains 40 original practice questions with first-person model answers written for dental hygienists and dental therapists applying for Band 5 posts in NHS community dental services, hospital dental departments and NHS-commissioned practices, with a selection pitched at Band 6. Each answer is built around a realistic, non-identifying scenario, from a periodontal assessment and a smoking cessation conversation to an anxious child needing a restoration, a patient with complex needs and a collapse in the chair. Every question explains what the panel is really assessing, the points you must hit, the mistakes to avoid and the guidance worth reading, so you can practise answers that sound like you rather than a textbook.

 

What this question bank covers

• Motivation for dental hygiene and therapy
• GDC scope of practice
• Direct access and its limits
• Working to prescription
• Periodontal assessment and the BPE
• Prevention and behaviour change
• Smoking cessation
• Local anaesthetic, PSDs and PGDs
• Children's restorative care
• Safeguarding children and adults
• Patients with complex needs and capacity
• Medical emergencies
• Infection prevention and decontamination
• Radiography and IR(ME)R
• Record keeping and confidentiality
• Oral cancer awareness
• Equality and oral health inequalities
• Teamwork and the wider dental team
• Leadership at Band 6
• CPD and wellbeing

 

40 NHS interview questions with full model answers. The first 8 are free to read below. Unlock the remaining 32 for £2.99 (12 months' access).

These are original practice questions written to reflect how NHS interviews are run. They are not leaked or official questions, and Healthcare Interview Prep is independent of the NHS.

 

 

Free NHS interview questions and model answers

 

 

Question 1: Why do you want to work as a dental hygienist and therapist in this NHS service?

Motivation question  ·  Motivation

 

What the interview panel is assessing

The panel wants a genuine reason for choosing this profession and this kind of service, not a general liking for teeth. They are listening for an understanding of prevention, of the patients the service sees, and of what NHS work asks of you compared with private practice.

 

Model answer

I came into dental hygiene and therapy because I like the part of dentistry where you actually change what happens next for someone. A filling fixes a hole. A good conversation about brushing, sugar or smoking can mean that person doesn't need the next filling at all. On my outreach placement I saw a man in his fifties who'd been told for years that he had "a bit of gum disease". Nobody had really explained it. We went through his charting together, I showed him where the bleeding was, and we agreed one small change he could manage. Twelve weeks later his bleeding scores had dropped noticeably, and he said it was the first time he'd felt in control of his own mouth.

That's the side of the job I want more of, and it's why I'm drawn to this service in particular. Your community service sees children referred from practices, adults with learning disabilities, people who are housebound, and patients who simply can't cope in a busy high street surgery. Those are the people with the most disease and the least access, and as a dual-qualified clinician I can offer both prevention and restorative care for children within my scope, which I think is a good fit for what you do.

I'll be honest that I know it isn't easy work. Appointments can take longer, some patients can't tell you what's wrong, and you're often working closely with carers, social workers and schools. I've had a taste of that on placement and it made me more interested, not less. I'd like to build my career somewhere I can keep learning from a team that does this every day, and I'd be proud to bring my skills here.

 

Why this answer works

The answer opens with a specific, believable patient moment rather than a cliche, and links it directly to prevention. It shows the candidate has researched the service's patient groups and connects their dual qualification to the service's needs, while staying realistic about the challenges.

 

Key points to include

• A real moment that shaped your choice
• Understanding that prevention sits at the heart of the role
• Knowledge of who this specific service sees
• How your hygiene and therapy skills fit the service
• Realism about the challenges of NHS and special care work

 

Common mistakes to avoid

• Saying you chose it because the hours suit you or it is less stressful than dentistry
• Giving a generic answer that could apply to any dental job
• Not mentioning anything about this particular service
• Talking only about clinical skills and never about patients

 

NHS values and standards

Improving lives; Everyone counts; Commitment to quality of care; GDC Standards: put patients' interests first

 

Further reading

• GDC Standards for the Dental Team
• GDC Scope of Practice
• NHS Constitution for England
• Delivering Better Oral Health: an evidence-based toolkit for prevention

 

 

Question 2: What does your GDC scope of practice allow you to do as a hygienist and therapist, and where are its limits?

Technical question  ·  Technical

 

What the interview panel is assessing

The panel is checking that you know your scope accurately and can explain it confidently, including what you must not do. They want to hear that you only work within your training and competence, and that you understand the difference between scope and personal competence.

 

Model answer

The GDC's Scope of Practice sets out what each registrant group can do, and the key thing for me is that it's a guide to what I can do if I'm trained, competent and indemnified, not a list of things I'll automatically do on day one.

As a hygienist, my core work is periodontal assessment and care. That means things like the BPE and full periodontal charting, supragingival and subgingival scaling and root surface debridement, oral health and smoking cessation advice, fluoride varnish and fissure sealants, taking radiographs and impressions, and giving local anaesthetic. At the moment I can't prescribe, so I give it under a patient specific direction from a dentist or a patient group direction where one is in place. There's been work on changing the medicines legislation so hygienists and therapists can supply and administer some medicines like local anaesthetic without a PGD, so I'd always check the current position and the service's policy. With a dentist's prescription I can also carry out tooth whitening.

As a therapist, I can also do direct restorations on primary and permanent teeth, pulpotomies on primary teeth, extract primary teeth and place preformed crowns on primary teeth. That's a big part of why I trained as a therapist, because so much of the need in children is restorative.

The limits matter just as much. I don't extract permanent teeth, carry out pulpotomies on permanent teeth, do endodontics on permanent teeth or provide indirect restorations like crowns and bridges. I don't prescribe medicines. Anything outside my scope gets referred to a dentist, and if a patient needs a diagnosis I can't make, such as an unusual lesion, I refer rather than guess.

The other limit is my own competence. If something is within scope but I haven't been trained in it, or I'm out of practice, I'd say so and arrange training before doing it. The GDC is clear that I'm accountable for my own decisions, so I'd rather be honest than stretch.

 

Why this answer works

This answer gives an accurate overview of hygiene and therapy scope and names the important exclusions clearly. It shows the candidate understands the difference between what the GDC permits and what they are personally competent to do, which is exactly what a panel wants to hear.

 

Key points to include

• Scope is permissive, not a checklist: training, competence and indemnity are needed
• Core hygiene duties including periodontal care and prevention
• Additional therapy duties for primary and permanent teeth
• Clear exclusions such as permanent extractions and indirect restorations
• Refer anything outside scope to a dentist
• Personal accountability under GDC standards

 

Common mistakes to avoid

• Overstating scope, for example saying you can extract any tooth or prescribe antibiotics
• Forgetting that local anaesthetic needs a PSD or PGD
• Confusing GDC scope with personal competence
• Reciting a long list without explaining how you stay within it

 

NHS values and standards

Commitment to quality of care; Respect and dignity; GDC Standards: work within your knowledge, skills, professional competence and abilities

 

Further reading

• GDC Scope of Practice
• GDC Standards for the Dental Team
• GDC guidance on direct access

 

 

Question 3: Talk us through how you would carry out a periodontal assessment for a new adult patient, including the BPE.

Clinical Scenario question  ·  Clinical Scenario

 

What the interview panel is assessing

The panel wants to hear a safe, structured approach that starts with the medical history and ends with a clear plan the patient understands. They are checking that you know the BPE, what each code means for further assessment, and how current periodontal classification shapes your diagnosis and treatment.

 

Model answer

I always start before I pick up a probe. I'd check and update the medical history, including diabetes, medications that affect bleeding or the gums, pregnancy and smoking, and ask about the patient's own concerns. Someone who's come in because their gums bleed when they brush is a very different conversation from someone who's been sent by their dentist.

Then I'd do the BPE using a WHO probe, dividing the mouth into sextants and recording the highest score in each. I'm looking for bleeding, calculus and plaque retention factors like overhanging margins, and the depth the black band reaches. A code 0 to 2 tells me there's no pocketing beyond about 3.5 millimetres, so the focus is oral hygiene and removing calculus or retention factors. A code 3 means further assessment of that area, and a code 4 or an asterisk for furcation involvement means a full six-point pocket chart of the whole mouth. I'd also record mobility, recession and bleeding scores, and plaque scores so we have a baseline. Radiographs are taken when they're justified, to assess bone levels.

I use the current periodontal classification, so I'd describe the diagnosis by stage, which reflects severity, and grade, which reflects the rate of progression and risk factors like smoking and diabetes, and whether it's currently stable or unstable. I'd check my staging and grading against the British Society of Periodontology guidance rather than from memory.

Finally, I'd explain what I've found in plain words. I often hand the patient a mirror and show them the bleeding sites. We'd agree the plan together, usually starting with oral hygiene and risk factor control before root surface debridement, and set a time to review. If I found something outside my scope, or very advanced or rapidly progressing disease, I'd discuss it with the dentist and consider referral.

 

Why this answer works

The answer follows a logical, safe sequence from history to diagnosis to plan, and shows correct use of the BPE and the current classification without overstating specific thresholds. It also keeps the patient involved and includes escalation when disease is beyond the candidate's scope.

 

Key points to include

• Start with medical history, risk factors and the patient's concerns
• Correct BPE technique and what codes 3, 4 and asterisk trigger
• Baseline bleeding and plaque scores and justified radiographs
• Diagnosis using staging and grading
• Shared plan, starting with oral hygiene and risk factor control
• Discuss with the dentist or refer when beyond scope

 

Common mistakes to avoid

• Skipping the medical history
• Saying a code 4 only needs that sextant charting
• Using outdated terms without mentioning the current classification
• Forgetting to explain findings to the patient

 

NHS values and standards

Commitment to quality of care; Working together for patients; GDC Standards: communicate effectively with patients

 

Further reading

• British Society of Periodontology BPE guidance
• BSP implementation of the 2017 classification of periodontal diseases
• Delivering Better Oral Health: an evidence-based toolkit for prevention
• GDC Standards for the Dental Team

 

 

Question 4: A patient with type 2 diabetes has bleeding gums and tells you they don't have time to clean between their teeth. How would you handle that conversation?

Communication question  ·  Communication

 

What the interview panel is assessing

The panel wants to see a respectful, patient-led approach to behaviour change rather than lecturing. They are listening for an understanding of the two-way link between periodontitis and diabetes, and for practical, small and realistic goals.

 

Model answer

The first thing I'd do is take that comment at face value. If someone says they don't have time, telling them off won't help, and it usually means interdental cleaning feels like a chore that doesn't seem to matter. So I'd start by asking about their day and what their routine actually looks like, and what they already know about their gums.

I'd then explain the link between gum disease and diabetes in simple terms. Something like, "Your gums and your blood sugar affect each other. When your diabetes is less well controlled, your gums are more likely to get inflamed, and inflamed gums can make it harder to control your sugars." I'd show them in the mirror where the bleeding is, because seeing it is much more powerful than hearing about it.

Then I'd ask them what feels possible, rather than telling them. I've had patients say they could do it while watching the news, or keep interdental brushes next to the kettle. I'd make sure they had the right sizes, show them how to use them and get them to try in the chair so I know they can do it. I'd keep it to one change, not five. If they say twice a week is all they can manage to start with, that's a start, and I'd tell them so.

I'd write down what we agreed in their notes and on a leaflet for them to take home, and at the review I'd show them their new bleeding scores so they could see the difference. I might also ask whether their diabetes team or GP knows about their gums, as it's useful for them to know. What I've learned is that people make changes when they feel listened to and see a result quickly, not when they feel judged.

 

Why this answer works

This answer uses a recognisable behaviour change approach without jargon: exploring the patient's view, giving tailored information, agreeing one realistic goal and showing progress. It explains the diabetes link accurately and keeps the patient in control.

 

Key points to include

• Explore the patient's routine and beliefs before advising
• Explain the two-way link between periodontitis and diabetes simply
• Show, don't just tell, using a mirror and bleeding scores
• Agree one small realistic goal and practise it in the chair
• Record the plan and review progress
• Consider communication with the GP or diabetes team

 

Common mistakes to avoid

• Lecturing or using fear without support
• Giving a long list of instructions at once
• Ignoring the patient's stated barrier
• Not checking that the patient can actually use the aids

 

NHS values and standards

Compassion; Respect and dignity; Improving lives; GDC Standards: communicate effectively with patients

 

Further reading

• Delivering Better Oral Health: an evidence-based toolkit for prevention
• NICE guidance on oral health and on behaviour change
• British Society of Periodontology patient information on gum disease and diabetes

 

 

Question 5: Which of the NHS values matters most to you in your work as a hygienist and therapist, and how have you shown it?

NHS Values question  ·  NHS Values

 

What the interview panel is assessing

The panel is checking that you know the NHS values and can link one to real behaviour in the surgery. They want an example rather than a definition, and some sense of why that value matters in dental care.

 

Model answer

The NHS values are working together for patients, respect and dignity, commitment to quality of care, compassion, improving lives, and everyone counts. They all matter, but the one I find myself coming back to is everyone counts, because in dentistry it's very easy for some people to drop off the radar.

On placement I saw a young woman who hadn't been to a dentist for about eight years. She was embarrassed, apologised for the state of her mouth before she'd even sat down and was clearly expecting to be told off. She had a lot of calculus and some active decay, and I think a less patient appointment would have sent her away for another eight years.

I slowed things down. I told her she'd done the hard part by coming in, and that my job wasn't to judge but to help. I explained what I was going to do before I did it, agreed a stop signal with her and kept checking in. We did a BPE and a first stage of treatment, and I made sure the dentist saw her for the decay. At the end she asked if she could book with me again, and she came back for every appointment in her plan.

For me, everyone counts means noticing the patients who are most likely to fall through the gaps, people who are anxious, people who've had bad experiences, people who struggle to afford treatment or get time off work, and making the effort to keep them in care. It links straight to the GDC principle of putting patients' interests first. It's not always about clinical skill. Sometimes it's about how you make someone feel in the first five minutes.

 

Why this answer works

The candidate names all six values accurately, chooses one and anchors it in a specific, believable patient encounter. The reflection on patients who fall through the gaps shows insight into dental inequalities and links the value to the GDC Standards.

 

Key points to include

• Name the NHS values correctly
• Choose one and explain why it matters in dentistry
• Give a specific example with your actions and the outcome
• Link to GDC principles
• Show insight into which patients are most at risk of missing out

 

Common mistakes to avoid

• Listing the values with no example
• Choosing a value without saying why
• Using an example where you were not the person acting
• Making the story about clinical technique only

 

NHS values and standards

Everyone counts; Respect and dignity; Compassion; GDC Standards: put patients' interests first

 

Further reading

• NHS Constitution for England
• GDC Standards for the Dental Team
• NHS People Plan and NHS People Promise

 

 

Question 6: You're doing a check-up and fluoride varnish for a seven-year-old. You notice untreated decay in several teeth, and the records show a number of missed appointments. What would you do?

Safeguarding question  ·  Safeguarding

 

What the interview panel is assessing

The panel wants to see that you recognise possible dental neglect without jumping to conclusions. They are looking for a staged, supportive response, good record keeping, involving the dentist and safeguarding lead, and knowing when concern needs to escalate.

 

Model answer

The first thing I'd remind myself is that decay and missed appointments on their own don't mean neglect. There can be lots of reasons, like a parent working shifts, transport problems, other children with health needs or their own dental anxiety. But I'd also keep in mind that dental neglect can be a sign of wider neglect, and that a child can't bring themselves to the dentist. So I'd describe those appointments as the child not being brought, rather than the child not attending.

In the appointment I'd focus on the child first. I'd check whether they're in pain, whether they're eating and sleeping well, and complete my assessment. I'd talk to the parent openly and kindly about what I'd found, explain what the decay means for their child and ask whether anything has made it hard to get to appointments. I'd agree a clear plan, which might include restorative treatment with me within my scope, prevention, and a referral to the dentist if the child needs care I can't provide.

I'd record exactly what I saw, what was said and the plan, using the parent's words where it's relevant. Then I'd talk it through with the dentist and our safeguarding lead that day. Following the stepped approach in the dental safeguarding guidance, most cases start with preventive support and the dental team working with the family. If appointments keep being missed, or the child is in pain and treatment isn't happening, we'd involve other professionals like the health visitor, school nurse or GP, and consider an early help referral.

If at any point I saw other worrying signs, such as an unexplained injury, a child who seemed frightened to go home, or something the child disclosed, I wouldn't wait. I'd follow the local child protection procedures and make sure a referral to children's social care happened the same day.

 

Why this answer works

This answer avoids assumptions while taking the concern seriously, and uses the language of "was not brought". It follows a stepped, proportionate approach consistent with dental safeguarding guidance and makes clear when immediate escalation is needed.

 

Key points to include

• Dental neglect can indicate wider neglect, but avoid assumptions
• Use "was not brought" language
• Focus on the child's pain and wellbeing
• Open, non-judgemental conversation with the parent and a clear plan
• Record accurately and discuss with the dentist and safeguarding lead
• Escalate through early help or children's social care when needed

 

Common mistakes to avoid

• Ignoring the missed appointments as just a booking issue
• Accusing the parent of neglect in the appointment
• Not recording the conversation
• Waiting for the next appointment when there are other warning signs

 

NHS values and standards

Everyone counts; Compassion; Working together for patients; GDC Standards: raise concerns if patients are at risk

 

Further reading

• Child protection and the dental team guidance
• BSPD guidance on dental neglect
• Working Together to Safeguard Children
• Children Act 1989 and 2004
• Local safeguarding children partnership procedures

 

 

Question 7: Partway through a periodontal appointment, a patient with diabetes becomes sweaty, confused and slurs their words. What would you do?

Patient Safety question  ·  Patient Safety

 

What the interview panel is assessing

The panel wants to see that you can recognise a medical emergency, act calmly using an ABCDE approach and work as a team. They are checking that you know hypoglycaemia management in a dental setting and when to call for an ambulance.

 

Model answer

I'd stop treatment straight away, remove anything from the patient's mouth and call for help so the dental nurse could bring the emergency kit, the oxygen and the defibrillator. I'd sit them upright if they were conscious and comfortable.

Then I'd go through ABCDE. Are they talking and is their airway clear? How is their breathing? Their pulse and colour? I'd check their level of response and, because they have diabetes and these are classic signs, I'd check a blood glucose if we have a meter and I'm trained to use it. But if I suspected hypoglycaemia and didn't have a reading, I wouldn't delay treatment.

If they were conscious and able to swallow safely, I'd give them a fast-acting glucose, such as the oral glucose gel or tablets in our kit, or a sugary drink. After about ten to fifteen minutes I'd recheck, and once they'd improved I'd give them something longer-acting to eat. If they became drowsy, couldn't swallow safely or lost consciousness, I'd put them in a safe position, call 999 and give glucagon by intramuscular injection in line with our emergency drugs protocol and my training. If they stopped breathing normally, I'd start CPR and use the defibrillator.

Throughout, I'd keep talking to the patient and give the nurse clear jobs, like calling the dentist through and noting the times. Afterwards, I wouldn't let them drive home on their own, and I'd advise them to contact their diabetes team. I'd write a clear account in the notes and complete an incident report so we could look at whether anything, like a long appointment over a mealtime, could be done differently.

Looking back on how I prepare, I always ask diabetic patients when they last ate and when they took their medication before I start. It's a small question that can prevent this happening.

 

Why this answer works

The answer is structured, prioritises safety and follows recognised emergency management in dental practice, including when to escalate to 999 and glucagon. It also shows teamwork, documentation and prevention for future appointments.

 

Key points to include

• Stop treatment and call for help and the emergency kit
• Assess using ABCDE
• Oral glucose if conscious and able to swallow, then recheck
• Glucagon and 999 if unable to swallow safely or unconscious, CPR if needed
• Document, report and advise on safe discharge
• Prevention: ask about food and medication before treatment

 

Common mistakes to avoid

• Waiting for a glucose reading before treating obvious hypoglycaemia
• Giving oral glucose to a patient who cannot swallow safely
• Trying to manage alone without calling the team
• Letting the patient drive home straight away

 

NHS values and standards

Commitment to quality of care; Working together for patients; GDC Standards: put patients' interests first

 

Further reading

• Resuscitation Council UK quality standards for primary dental care
• Resuscitation Council UK guidance on medical emergencies and resuscitation
• British National Formulary guidance on medical emergencies in dental practice
• Local emergency drugs and equipment policy

 

 

Question 8: Tell us about a time you made a mistake in clinical practice. What happened and what did you learn?

Patient Safety question  ·  Patient Safety

 

What the interview panel is assessing

The panel wants honesty, insight and evidence that you put the patient first when something goes wrong. They are listening for openness with the patient, escalation, reporting and a concrete change in your practice, in line with the duty of candour.

 

Model answer

During my final year, I was seeing a patient for root surface debridement in two lower quadrants. I'd checked the medical history at the start of the course, and at the second visit I asked, "Any changes to your health?" and the patient said no. I gave the local anaesthetic and started. About ten minutes in, the bleeding seemed more than I'd expect, and when I asked again more specifically about tablets, the patient mentioned that their GP had started them on an anticoagulant the week before. They hadn't thought of it as a change because they "felt fine".

I stopped, managed the bleeding with pressure and local measures and called my clinical supervisor over. We checked the medication and the current guidance, and it turned out the procedure was one that could usually be carried out safely with local measures, so there was no harm. But I hadn't done the history check properly, and I knew that.

I was open with the patient. I said, "I should have asked you about your medicines in more detail before we started, and I'm sorry." I explained what we'd done, why I wasn't worried and what to look out for at home. My supervisor and I completed an incident report, and I wrote a reflection for my portfolio.

What I learned was that "any changes?" is not a medical history check. Now I go through the medication list out loud at every appointment and ask specifically about blood thinners, new tablets from the GP, and anything bought over the counter. I also suggested at a team meeting that our reception staff hand patients the medical history form at every visit, not just once a year, which the clinic took up. It was a small mistake, but it changed how I work.

 

Why this answer works

This answer chooses a genuine, relevant mistake that caused no harm but could have, and shows immediate patient safety actions, openness, an apology and reporting. The learning is specific and has led to a lasting change, which is exactly what panels want.

 

Key points to include

• Choose a real, relevant mistake, not a disguised strength
• Immediate actions to keep the patient safe
• Escalate to a supervisor or dentist
• Be open and apologise to the patient
• Report and reflect
• A specific, lasting change in practice

 

Common mistakes to avoid

• Saying you have never made a mistake
• Blaming the patient or colleagues
• Choosing an example so serious it raises fitness to practise concerns without showing learning
• Not mentioning what you told the patient

 

NHS values and standards

Commitment to quality of care; Respect and dignity; GDC Standards: be honest and act with integrity; Duty of Candour

 

Further reading

• GDC guidance on being open and honest with patients when something goes wrong
• Statutory Duty of Candour (CQC Regulation 20, England)
• Patient Safety Incident Response Framework (PSIRF)
• SDCEP Management of Dental Patients Taking Anticoagulants or Antiplatelet Drugs

 

 

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