Orthodontics Interview Questions & Answers

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About this NHS interview question bank

To prepare for a hospital orthodontics NHS interview, expect questions on IOTN and NHS eligibility, valid consent with children and young people, multidisciplinary cleft, orthognathic and hypodontia care, waiting list harm, safeguarding and missed appointments, and how you supervise trainees and orthodontic therapists. Build short spoken answers around real clinical moments, and know the GDC Standards for the Dental Team, the NHS values and how your target department is organised before you walk in.

This bank contains 40 original practice questions with first-person model answers written for orthodontists applying for Specialty Doctor posts in hospital orthodontic departments, with a selection pitched at Consultant level. It is also useful for specialty trainees and orthodontic therapists preparing for hospital interviews. Each answer is built around a realistic, non-identifying scenario from a hospital orthodontic clinic, joint clinic or multidisciplinary setting. Every question explains what the panel is really assessing, the points you must hit, the mistakes to avoid and the frameworks worth reading, so you can practise answers that sound like you rather than a textbook.

 

What this question bank covers

• Motivation for hospital orthodontics
• NHS values and fair use of resources
• IOTN and NHS eligibility
• Consent and Gillick competence
• Communicating with anxious teenagers and parents
• Cleft lip and palate care
• Orthognathic joint clinics
• Hypodontia and restorative interface
• Impacted canines
• Root resorption and decalcification
• Waiting lists and clinical harm review
• Safeguarding, dental neglect and Was Not Brought
• Supervising trainees and orthodontic therapists
• Audit, PAR and quality improvement
• Complaints about outcomes and relapse
• Confidentiality, photographs and records
• IR(ME)R and radiography
• Patient safety and Never Events
• GDC Standards, 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 in a hospital orthodontic department rather than in specialist practice?

Motivation question  ·  Motivation

 

What the interview panel is assessing

The panel wants to know that you understand what makes hospital orthodontics different: complex and multidisciplinary cases, teaching, and treatment for patients who could not be managed elsewhere. They are listening for a genuine reason, not a sense that the hospital is simply a stepping stone.

 

Model answer

I've enjoyed specialist practice, and I'd never talk it down, because it's where most children in this country get their orthodontic care. But the cases that have stayed with me are the ones that needed more than one specialty in the room. The clearest example is a teenager I saw in a joint clinic with the maxillofacial team. He had a significant skeletal discrepancy, he'd stopped answering questions in class because he hated how he spoke, and he'd been told for years that braces alone wouldn't fix it. Sitting in that clinic, seeing the surgeon, the orthodontist and later the psychologist all plan around him, I realised that's the kind of work I want to spend my career doing.

Hospital orthodontics gives me that. Cleft patients who you follow from early childhood into adulthood, hypodontia cases planned with restorative colleagues, impacted teeth with oral surgery, orthognathic patients, and children with medical conditions or additional needs who simply couldn't be treated safely in a high street setting. These patients often have the highest need and the longest journeys, and I like the continuity of being part of that.

I'm also drawn to the teaching side. I've supervised foundation dentists and helped orthodontic therapists with tricky bond-ups, and I find it genuinely satisfying when someone's confidence grows over a few months. A hospital department is where the next generation of orthodontists and therapists learn, and I want to contribute to that properly.

And honestly, I like being in an NHS team. Waiting lists are long and the work can be demanding, but I'd rather be helping a department make sensible, fair decisions about who gets treated and when than working on my own. That's why this post appeals to me.

 

Why this answer works

The answer respects specialist practice while making a clear, specific case for hospital work. It names the real case mix of hospital orthodontics, brings in teaching, and shows awareness of waiting list pressures without sounding put off by them.

 

Key points to include

• A specific moment or patient that drew you to complex care
• Understanding of the hospital case mix: cleft, orthognathic, hypodontia, impactions, medically complex patients
• Interest in multidisciplinary working
• Commitment to teaching and supervision
• Realism about demand and waiting lists

 

Common mistakes to avoid

• Criticising specialist practice or implying it is less skilled
• Saying the hospital is mainly a route to a consultant post
• Giving a generic answer that could fit any dental specialty
• Ignoring teaching and training

 

NHS values and standards

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

 

Further reading

• GDC Standards for the Dental Team
• NHS Constitution for England
• British Orthodontic Society guidance on hospital orthodontic services

 

 

Question 2: A parent is upset because their 13-year-old has been assessed as not eligible for NHS orthodontic treatment. How would you handle that conversation?

Communication question  ·  IOTN and eligibility

 

What the interview panel is assessing

The panel is checking that you can explain the Index of Orthodontic Treatment Need clearly and kindly, without hiding behind it. They want to hear empathy, accurate information about eligibility, and practical options, while keeping the young person involved in the conversation.

 

Model answer

First, I'd make sure I was having the conversation properly: sitting down, with the young person in the room, not rushing it at the end of a busy clinic. I'd start by asking what they'd been hoping for and what bothers them about their teeth, because sometimes the worry is about one tooth that's being teased at school, and that changes what I can offer.

Then I'd explain how the NHS decides. I'd say something like, "The NHS uses a scoring system called IOTN to make sure treatment goes to the children whose teeth are causing the most problems for their health. It looks at things like how far the teeth stick out, whether teeth are impacted or missing, and how the bite works. It also has a picture scale for how the teeth look." In England, children under 18 generally qualify if the health score is high enough, or if it's borderline and the appearance score is also high. I'd show them exactly where their child sat, using their own photos or models if I had them, so it doesn't feel like a decision made behind closed doors.

I'd be honest that I understand it's disappointing. Many parents feel it's unfair, especially if a friend's child got braces. I wouldn't argue with that feeling. I'd just explain that the threshold is about need, and that the score reflects the teeth now.

Then I'd give them options. Teeth can change as children grow, so if there was any chance of things shifting I'd suggest a review or ask their dentist to re-refer later. I'd mention that private treatment exists if they want to explore it, without pushing it, and that some things, like good brushing and regular dental visits, matter whatever they decide.

Finally I'd check that the young person had a chance to speak, and I'd document the scores, what was discussed and the plan, and copy that to their dentist. If the parent still wanted to take it further, I'd tell them how to raise a concern or contact PALS, and I'd be completely comfortable with that.

 

Why this answer works

The answer explains IOTN in plain English, gives the eligibility principle accurately for England, and stays empathetic without making false promises. It keeps the young person central, offers realistic next steps and treats a parent's right to complain as normal.

 

Key points to include

• Explain IOTN simply, using the patient's own records
• Know the general NHS eligibility principle and that it can vary by nation
• Acknowledge disappointment without being defensive
• Offer review, re-referral and honest information about private options
• Involve the young person and document clearly

 

Common mistakes to avoid

• Using jargon such as DHC and AC without explaining it
• Implying the decision is about money rather than need
• Promising to bend the criteria to calm the parent
• Talking only to the parent and ignoring the child

 

NHS values and standards

Everyone counts; Respect and dignity; Compassion; GDC Standards: communicate effectively with patients

 

Further reading

• Index of Orthodontic Treatment Need (IOTN)
• NHS England guidance on commissioning orthodontic services
• GDC Standards for the Dental Team
• NHS complaints and PALS guidance

 

 

Question 3: A 14-year-old attends alone for a consent appointment for fixed appliances. Their parent has told you by phone they want treatment, but the young person seems unsure. How do you approach consent?

Clinical Scenario question  ·  Consent and Gillick competence

 

What the interview panel is assessing

The panel wants to know that you understand consent for under-16s in England, including Gillick competence, and that you recognise orthodontics as elective treatment that depends on the young person's willing cooperation. They are also listening for good communication and documentation.

 

Model answer

I'd start by being pleased they've come, and then slow things right down. Orthodontic treatment is elective, it lasts a long time and it only works if the young person is on board, so their view matters enormously, not just legally but practically.

I'd explain what fixed braces actually involve: how long treatment usually takes, the appointments, the soreness after adjustments, the changes to eating and brushing, and the risks, including decalcification if hygiene isn't good, some root shortening, and relapse without retainers. I'd also explain the alternatives, including doing nothing. Then I'd ask them to tell me back in their own words what they'd be signing up for, and ask directly, "How do you feel about this? It's fine to say you're not sure."

If they can understand, retain and weigh up that information and communicate a decision, they may well be Gillick competent to consent themselves. But competence is decision-specific, and here the bigger issue is that they seem unsure. I wouldn't start treatment on the strength of a phone call from a parent when the young person themselves is hesitant. Braces put on a reluctant teenager often end with poor hygiene, breakages and a damaged result.

So I'd suggest we pause. I'd encourage them to talk it through with their parent, and offer a joint appointment so we can all discuss it together. Usually, for a 14-year-old, I'd want a parent involved anyway, as long as the young person is happy with that. I'd check, gently, that there's nothing else behind the hesitation, like worries about bullying, cost of travel or something at home.

I'd document what information I gave, my assessment of their understanding, their views and the plan to rebook. And I'd follow the trust's consent policy, which may have specific expectations about who attends for consent with children.

 

Why this answer works

The answer shows an accurate grasp of Gillick competence while recognising that, for elective orthodontics, a hesitant young person should not be pushed into treatment. It covers risks, alternatives and documentation, and it leaves room for a gentle safeguarding check.

 

Key points to include

• Explain treatment, risks and alternatives in age-appropriate language
• Assess understanding using teach-back
• Gillick competence is decision-specific
• Do not start elective treatment on a hesitant young person
• Involve parents with the young person's agreement and document carefully

 

Common mistakes to avoid

• Treating the parent's phone call as consent
• Assuming a 14-year-old can never consent
• Pressuring the young person because the waiting list was long
• Forgetting to mention decalcification and root resorption risks

 

NHS values and standards

Respect and dignity; Everyone counts; GDC Standards: obtain valid consent

 

Further reading

• GDC Standards for the Dental Team, principle 3 (valid consent)
• Gillick v West Norfolk and Wisbech AHA (1985)
• Mental Capacity Act 2005 (for 16 and 17-year-olds)
• Trust consent policy

 

 

Question 4: Which NHS value is most important to you in orthodontics, and how do you show it?

NHS Values question  ·  NHS Values

 

What the interview panel is assessing

The panel is checking that you know the six NHS values and can link one convincingly to everyday orthodontic practice. They want a real example and some thought about why that value matters in a specialty where treatment is long and rationed.

 

Model answer

The six NHS values are working together for patients, respect and dignity, commitment to quality of care, compassion, improving lives, and everyone counts. In orthodontics, the one I think about most is everyone counts, because our whole system of who gets treated rests on fairness.

Hospital orthodontics has long waiting lists, and the NHS can't treat every child who'd like straighter teeth. That's why we use need-based criteria. For me, everyone counts means applying those fairly and consistently, so a child from a family who can't push hard or doesn't speak much English gets exactly the same chance as one whose parent rings every week.

I'll give an example. I noticed in one department that a few patients were being moved up the list informally because their families had phoned repeatedly. None of them were urgent. I raised it with the consultant, and we agreed that changes in priority should be based on clinical reasons only and recorded. We also made sure families had a clear, written explanation of how the list worked, which actually reduced the phone calls.

Everyone counts also means thinking about the patients who don't turn up. Children who are repeatedly not brought are often the ones who need us most, so I'd rather pick up the phone and understand what's happening than just discharge them.

It sits alongside the other values, of course. Treatment lasts two years or more, so respect, compassion and working together all matter. But fairness is the one that shapes most of the decisions I make in clinic.

 

Why this answer works

The candidate names all six values correctly and chooses one that is genuinely relevant to rationed orthodontic care. The example shows quiet, constructive action rather than criticism, and the link to missed appointments shows wider awareness.

 

Key points to include

• Name all six NHS values accurately
• Choose one and explain why it matters in orthodontics
• Give a concrete example of acting on it
• Link fairness to need-based criteria and waiting lists
• Show awareness of patients who are not brought

 

Common mistakes to avoid

• Reciting the values without an example
• Confusing the NHS values with the GDC principles
• Describing an example that criticises colleagues harshly
• Choosing a value with no link to orthodontics

 

NHS values and standards

Everyone counts; Commitment to quality of care; Respect and dignity

 

Further reading

• NHS Constitution for England
• GDC Standards for the Dental Team
• Trust waiting list and access policy

 

 

Question 5: A 12-year-old in active fixed appliance treatment has missed three appointments in a row, and the last time they attended you noticed very poor oral hygiene and untreated decay. What would you do?

Safeguarding question  ·  Was Not Brought and dental neglect

 

What the interview panel is assessing

The panel wants to see that you think of children as 'not brought' rather than 'did not attend', and that you can recognise when missed appointments and poor oral health might indicate neglect. They are looking for proportionate action, information gathering, and knowing when to involve the safeguarding team.

 

Model answer

The first thing I'd do is change how I'm thinking about it. A 12-year-old doesn't bring themselves to hospital, so this is a child who hasn't been brought, not one who's chosen not to come. That matters, because a child with braces on, poor hygiene and untreated decay is coming to harm while we wait.

I'd look back through the record: how attendance has been over time, whether there were previous concerns, whether there's a social worker or a child protection plan flagged, and whether the general dental practitioner has seen them. I'd also check the contact details are right, because sometimes it's just a wrong number.

Then I'd make contact. I'd phone the parent, in a supportive way, to ask what's been getting in the way. Often it's practical: school, transport, a parent working shifts, other children to look after. If so, I'd try to help, maybe with appointment times or information about travel cost support. I'd explain clearly that the braces are now a risk to their child's teeth.

I'd also contact the dentist, because untreated decay needs managing in primary care, and I'd let the GP know about the missed hospital appointments in line with our Was Not Brought policy.

If I couldn't make contact, or there were other worrying signs, like the child looking unkempt, saying something concerning, or a pattern across health services, I'd speak to the trust's named safeguarding lead and follow local procedures, which may include a referral to children's social care. Dental neglect on its own can be a safeguarding concern when it persists despite support.

Clinically, I'd be honest that it may not be safe to continue fixed appliances. If attendance and hygiene didn't improve, I'd discuss with my consultant whether to remove them, and I'd explain that to the family. And I'd document every attempt at contact and my reasoning clearly.

 

Why this answer works

The answer reframes missed appointments as 'not brought', starts supportively, and escalates proportionately. It links dental neglect to safeguarding without jumping straight to accusation, and it addresses the clinical risk of continuing fixed appliances.

 

Key points to include

• Use the Was Not Brought framing for children
• Check records and contact details first
• Contact the family supportively and address practical barriers
• Inform the GDP and GP, and involve the safeguarding lead if concerns persist
• Consider whether fixed appliances are still safe and document everything

 

Common mistakes to avoid

• Simply discharging the child after repeated non-attendance
• Jumping to a social care referral without gathering information
• Ignoring the decay because it is the dentist's job
• Not documenting contact attempts

 

NHS values and standards

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

 

Further reading

• Working Together to Safeguard Children (2023)
• Children Act 1989 and 2004
• British Society of Paediatric Dentistry policy on dental neglect
• Child Protection and the Dental Team
• Trust Was Not Brought policy

 

 

Question 6: At a routine adjustment you notice white spot lesions developing around several brackets. How would you manage this?

Patient Safety question  ·  Decalcification

 

What the interview panel is assessing

The panel wants to see that you recognise decalcification as a real and preventable harm of orthodontic treatment. They are looking for prevention, honest communication with the patient and family, and a willingness to stop treatment if the risk outweighs the benefit.

 

Model answer

I'd take it seriously straight away, because once white spot lesions become established they can leave permanent marks, and the whole point of treatment is to improve someone's teeth, not damage them.

First I'd document it carefully, ideally with clinical photographs, noting which teeth were affected and how severe it looked. That gives us a baseline to compare against. Then I'd talk to the patient, and their parent if they're with them, without blaming. Teenagers often know their brushing isn't great, and a lecture tends to make them switch off. I'd show them the photos, explain what the chalky marks mean, and ask what's making brushing hard. Is it time in the morning, sore gums, not knowing how to get under the wire?

Then I'd do some proper coaching: showing them with an interdental brush, maybe disclosing tablets, and agreeing something small and realistic. I'd reinforce diet advice, especially sugary and fizzy drinks between meals. In line with Delivering Better Oral Health, I'd recommend a daily fluoride mouthrinse and check whether a higher-strength fluoride toothpaste would be appropriate, and I'd let their dentist know so they can apply fluoride varnish and support them too.

I'd bring them back sooner to review. If things improved, great. If they didn't, I'd be honest that we may need to stop treatment and remove the braces to protect their teeth, even if the result isn't finished. I'd discuss that decision with my consultant and with the family, and frame it as protecting the child rather than a punishment.

Looking at the bigger picture, if I noticed several patients developing lesions, I'd suggest we audit our hygiene checks and prevention advice at the start of treatment. Prevention works best before the brackets go on.

 

Why this answer works

The answer treats decalcification as a patient safety issue, combines practical prevention with honest, non-judgemental communication, and is clear about the option to stop treatment. Linking to primary care and to audit shows team and system thinking.

 

Key points to include

• Document lesions with photographs as a baseline
• Coach, rather than lecture, the young person
• Fluoride and diet advice in line with Delivering Better Oral Health
• Involve the general dental practitioner
• Be prepared to end treatment early to prevent harm

 

Common mistakes to avoid

• Making only a brief note and carrying on
• Blaming or shaming the teenager
• Quoting fluoride concentrations you are unsure of
• Never considering removing appliances

 

NHS values and standards

Commitment to quality of care; Compassion; GDC Standards: put patients' interests first

 

Further reading

• Delivering Better Oral Health: an evidence-based toolkit for prevention
• British Orthodontic Society patient information on oral hygiene with braces
• GDC Standards for the Dental Team

 

 

Question 7: What does the orthodontist contribute to a cleft lip and palate multidisciplinary team?

Teamwork question  ·  Cleft MDT

 

What the interview panel is assessing

The panel wants to know that you understand how cleft care is organised and where orthodontics fits in a child's long journey. They are listening for a clear grasp of the key orthodontic stages, respect for other professions, and the importance of the child and family's voice.

 

Model answer

Cleft care in the UK is centralised into regional cleft networks, so children are looked after by a specialist team over many years: cleft surgeons, specialist nurses, speech and language therapists, orthodontists, psychologists, paediatric dentists, restorative colleagues and audiology, among others. The orthodontist is one of the few people who follows the child from early on right through to adulthood, so part of what we bring is continuity.

Clinically, our role has a few key stages. In the early years we're often involved in records and monitoring growth and the developing dentition. In the mixed dentition, a big contribution is preparing the child for alveolar bone grafting. That usually means expanding or aligning the upper arch so the surgeon has good access, and timing it so the graft is in place before the canine erupts through the cleft area. Later on, there's comprehensive treatment to align the teeth, manage missing or malformed teeth around the cleft, and sometimes prepare for orthognathic surgery if the upper jaw hasn't grown forwards enough.

We also contribute to the team's audit of outcomes, because cleft services in the UK have a strong culture of measuring results nationally.

But beyond the clinical stages, I think the orthodontist's real contribution is understanding how all this feels for the child. Treatment can stretch over many years, with surgery, speech therapy and lots of appointments. I try to plan alongside the speech therapist and psychologist, not separately, and to time things around school and the child's own readiness. As children get older, I make sure they're the ones deciding, not just their parents.

So I'd describe it as a mix of technical timing and long-term relationship. I'd be keen to contribute to this department's links with the regional cleft team.

 

Why this answer works

The answer shows accurate knowledge of the orthodontic stages in cleft care, especially preparation for alveolar bone grafting, and places them in the context of a centralised, multidisciplinary service. It emphasises continuity and the child's voice rather than just technique.

 

Key points to include

• Cleft care is delivered through regional specialist networks
• Key orthodontic role in preparing for alveolar bone grafting
• Later comprehensive treatment and possible orthognathic surgery
• Continuity and planning alongside speech therapy and psychology
• Contribution to outcome audit and the child's growing autonomy

 

Common mistakes to avoid

• Describing only the brackets and wires
• Giving exact ages and protocols you are not sure of
• Ignoring psychological and speech aspects
• Forgetting the family's long journey

 

NHS values and standards

Working together for patients; Commitment to quality of care; Improving lives

 

Further reading

• NHS England service specification for cleft lip and palate
• Cleft Registry and Audit Network (CRANE) outputs
• CLAPA (Cleft Lip and Palate Association) family resources
• GDC Standards for the Dental Team

 

 

Question 8: Our new patient and treatment waiting lists are long. How would you help make sure patients waiting are not coming to harm?

Operational Scenario question  ·  Waiting lists and harm

 

What the interview panel is assessing

The panel wants to see that you understand waiting lists as a clinical safety issue, not just an administrative one. They are listening for clinical prioritisation, harm review, communication with patients and referrers, and constructive ideas rather than complaints.

 

Model answer

I think the starting point is accepting that in orthodontics, waiting isn't always harmless. Most children waiting for routine treatment won't come to serious harm, but some will. An ectopic canine can resorb the roots of the incisors next to it. A child waiting for a cleft bone graft has a narrow window. A child with a traumatic deep bite can damage their gums. And time matters for growth modification, so a delay can change what treatment is possible.

So the first thing is good triage of referrals. I'd want to make sure referrals are read by a clinician, and that urgent features like suspected impactions with resorption, cleft and syndromic patients and growth-sensitive cases are clearly flagged and seen sooner, according to agreed criteria.

Second, I'd support a clinical review of long waiters. That might mean validating the list, writing to families to check they still want treatment, and having a process for referrers or families to tell us if something changes, like pain or a tooth not coming through. Where the trust has a harm review process for long waits, I'd make sure orthodontic patients are included properly.

Third, I'd look at how we use capacity. Things like making sure orthodontic therapists are fully used for appropriate cases under prescription, reducing appointment waste from patients not brought, and making sure retention reviews don't fill clinics unnecessarily.

Finally, honesty with families and with referring dentists. I'd want letters to tell them roughly how long the wait is, what to look out for and who to contact. And if I found that someone had come to harm because of a delay, I'd report it through the incident system so we learn from it.

I'd see myself contributing to that as a specialty doctor, working under the consultants' lead.

 

Why this answer works

The answer frames waiting as a clinical risk with specific orthodontic examples, then offers practical, proportionate actions: triage, validation, harm review, capacity and communication. It is constructive and recognises the specialty doctor's role within the team.

 

Key points to include

• Give specific orthodontic examples of harm from waiting
• Clinician triage with agreed priority criteria
• Validation and clinical review of long waiters
• Better use of capacity, including therapists
• Clear communication with families and referrers, and incident reporting for harm

 

Common mistakes to avoid

• Treating waiting lists as purely an admin problem
• Proposing to ignore criteria to clear the list
• Only complaining about lack of resources
• Forgetting growth-sensitive and cleft patients

 

NHS values and standards

Everyone counts; Commitment to quality of care; Working together for patients

 

Further reading

• NHS Constitution for England (rights on waiting times)
• Patient Safety Incident Response Framework (PSIRF)
• Trust access policy and clinical harm review process
• British Orthodontic Society guidance on referral and triage

 

 

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