Dental Assistant Interview Questions

"I first saw the job from the patient side. I had a lot of dental work as a teenager, and the assistant was the one who kept me calm and explained what was happening. When I was choosing a course, that stuck with me. On my training placement I found I really liked the rhythm of chairside work: getting the tray right, keeping the field clear, and knowing what the dentist needs next. I also like that it's hands-on and I see the result the same day, a patient who walked in in pain and leaves comfortable. I've been assisting in a general practice for two years now, and I want to keep building my skills in a busy team like yours."

"I looked at your website and your reviews before applying. You do a lot of family dentistry, with plenty of children, and you also offer implants and some sedation work. That mix appeals to me. At my current practice I assist on general treatment every day and I've done a fair amount with nervous children, so I'd be useful from the first week. The implant side is something I'd really like to learn properly, and it looks like you see enough of those cases to get good at it. I also noticed several reviews mention how calm and kind the team is, and that's where I want to work, because patients remember how the assistant treated them as much as the dentist."

"I finished an accredited dental assisting course with a clinical placement, and I've kept my infection control and CPR training up to date. In my last role I assisted chairside on fillings, extractions, root canals and crown preps, took intraoral X-rays after being trained and signed off, took impressions for study models, and ran sterilisation. I also covered the front desk sometimes. What I don't do is anything outside what my qualification and the local rules allow, and those rules differ from one place to another. So when I join a new practice, I ask early for their list of what assistants are permitted to do there, and where extra certification is needed, for example for X-rays or expanded duties. I'd rather ask than assume."

"I keep my required training current, like infection control, CPR and radiography updates, and I don't leave it to the last week. Beyond that, I learn most from the dentists I work with. I ask why they chose one material over another, and I read the instructions for anything new we bring in, because every material handles a little differently. I also follow a professional association for dental assistants and join their evening sessions when I can. What I'd like to learn next is implant assisting, especially the surgical setup and keeping a sterile field. I'd also be interested in any extra duties my local rules allow assistants to train for, if the practice supports that. An assistant who keeps learning makes the whole surgery run better."

"We had a man in his fifties who hadn't seen a dentist in about ten years because of a bad experience. He was gripping the chair before we'd even started. I sat at his eye level instead of standing over him and asked what had happened last time. He said nobody told him what was going on. So I agreed a stop signal with him, raising his left hand, and made sure the dentist knew. During the filling I told him what each sound was before it happened, like the water spray and the suction. He raised his hand once, we stopped, he had a short break, and we carried on. He finished the treatment and booked his next visit on the way out, which felt like a real win."

"A six-year-old came in for her first filling and refused to open her mouth. Her dad was getting frustrated, which made it worse. The dentist and I slowed right down. I used tell-show-do: I told her the suction was a little straw that drinks the water, showed it on her hand so she could hear it, then used it in her mouth. We used kid words and never said 'needle' or 'hurt'. I gave her a job, holding a mirror so she could watch, and we praised every small step. We also gently asked her dad to stay quiet and calm, since kids pick up on it. It took longer than booked, but she let the dentist finish, and at her next visit she walked in on her own."

"I'd raise it with the dentist before anything starts, ideally before the anaesthetic goes in. I wouldn't make it awkward for the patient, so I'd say something like, 'Can I just check one thing on the history with you?' and point to the new medicine. Then I'd let the dentist talk it through with the patient. What happens next is the dentist's decision, whether that's going ahead with extra steps to control bleeding, checking with the patient's doctor, or rebooking. What I'd never do is tell the patient to skip a dose or reassure them it doesn't matter, because that's outside my role and could be dangerous either way. Afterwards I'd make sure the history in the record is correct and the dentist's decision is written down."

"The parent means well, so I wouldn't correct them in front of the child. I'd check with the dentist how they want to handle it. Often I'd give the parent a simple job, like, 'It really helps if you hold her foot and let us do the talking, so she only hears one voice.' Children hear the word 'hurt' even with 'won't' in front of it, so I'd switch to our own words, like 'sleepy juice' for the numbing, and keep praising what the child is doing well. If the parent keeps going, the dentist might kindly suggest they sit just behind the child or outside the door. Afterwards I'd share a couple of tips with the parent, like not promising it won't hurt and keeping the visit low-key at home."

"I tell them to bite firmly on the gauze for as long as the dentist advises so a clot can form. For the first day, no rinsing, no hard spitting, no drinking through a straw and no smoking, because those can dislodge the clot and lead to a dry socket. Hot drinks and chewing wait until the numbness wears off, so they don't burn themselves or bite their cheek. Soft food, chewing on the other side, and from the next day gentle warm salt-water rinses. Pain relief as the dentist recommended. A little oozing is normal, but if it bleeds heavily and won't stop with pressure, if the pain gets worse after a few days, or if swelling and fever build up, they should call us. Because people forget things when they're numb, I give it in writing too, with the out-of-hours number."

"When I started with a new dentist at my last practice, I kept a small notebook for her. After each type of procedure I wrote down her order: which burs she used first, when she wanted the matrix band, how she liked composite handed over. I also watched for her signals. Pulling the handpiece back out of the mouth meant she wanted to swap. Within a few weeks I had the next instrument ready in the transfer zone as she finished with the last one. It made a real difference. Her crown preps got shorter, and she said she didn't have to break focus to ask for things. I then turned those notes into preference cards so cover assistants could do the same."

"Early on I set up for a crown prep and forgot the retraction cord. We didn't notice until the dentist was ready for the impression. I said straight away, 'Sorry, I've missed the cord, I'll get it now,' took my gloves off, fetched it, re-gloved and was back in about a minute. The patient barely noticed. Afterwards I apologised to the dentist and asked myself why it happened. The honest answer was I'd set up from memory. So I started using the practice's checklist for each procedure and ticking items off as I laid the tray out. I haven't missed a crown item since, and now I check each tray against the day's list before the first patient arrives."

"I start with the basic set: mirror, probe and tweezers. Then local anaesthetic: syringe, the right cartridge and needle, and topical if the dentist uses it. For isolation I lay out cotton rolls or the rubber dam kit, plus the high-volume suction tip and saliva ejector. For the filling itself I set out the handpieces and the burs the dentist likes, etch, bonding agent and applicator brushes, a matrix system and wedges, composite in the likely shades, placement instruments, and the curing light, which I check is working. To finish I have articulating paper, finishing burs or discs, and floss. I lay everything out in the order it'll be used, and I check it against the dentist's preference card and today's plan before the patient sits down."

"It means the dentist and I work as one unit so the dentist can keep their eyes on the mouth. The patient is lying back, the dentist sits in their working zone, and I sit on the other side a little higher so I can see into the mouth. Instruments pass in the transfer zone, just below the patient's chin and over the chest, never across the face. With a right-handed dentist I pass with my left hand: I take the used instrument back with my little finger and hand over the new one in the same movement, with the working end already facing the right way. My right hand stays on the high-volume suction, so the field stays clear while we swap. For sharps I follow the practice rule, often a neutral zone instead of hand to hand, and needles are only recapped one-handed or with a device."

"I choose a tray that fits the arch with room for the material, and try it in first. I measure the powder and water with the maker's scoop and measure, because the wrong ratio changes the set and the strength. Water temperature matters too: warmer water makes it set faster, cooler water gives more working time. I mix firmly against the side of the bowl until it's smooth and creamy, with no lumps or air, then load the tray without trapping bubbles. Once it's set, it comes out with one quick snap, which tears it less. Then I rinse it, disinfect it the way the maker allows, and get it poured or sent off quickly, because alginate loses or takes up water and changes shape if it sits. The usual problems are air bubbles, a tray that's too small, and waiting too long to pour."

"At my last practice I noticed a newer colleague taking a pouch out of the steriliser, seeing it was still damp, and putting it straight into the drawer. Wet packs can draw in contamination, so they shouldn't be stored like that. I didn't make a scene. I pulled that pack to be repacked and sterilised again, told her quietly why, and we left the rest of the load in the steriliser to dry fully. Then I checked the drawer for others from that cycle. Afterwards I mentioned to our lead that drying wasn't in our written checklist, which was probably why it got missed, and we added it. I've been on the other side too: once I touched the paper chart with a contaminated glove. I said so, changed gloves and dealt with it. Owning it quickly matters more than looking perfect."

"I wouldn't use anything in that pouch. I'd treat it as not sterile, open a fresh pack for the patient, and send the failed one back to be cleaned, repacked and sterilised again. Then I'd find out whether it's just that pouch or the whole load. I'd check the other packs from the same cycle, look at the cycle printout or log, and tell whoever leads on sterilisation. One pouch can fail because the chamber was overloaded or it was packed badly. But if the cycle itself looks wrong, the whole load gets pulled and reprocessed, the machine stays out of use until it's checked, and a spore test is run, following our written procedure. I'd also record what happened so there's a clear trail if questions come up later."

"At the chair, whoever used the sharps puts needles and blades straight into the sharps bin. The instruments go to the decontamination room in a closed container. There I wear heavy-duty gloves, eye protection and a mask, and work from the dirty side to the clean side, never backwards. Instruments are cleaned first, ideally in a washer-disinfector or ultrasonic cleaner rather than by hand scrubbing, then rinsed and dried. I inspect them under good light for leftover debris or damage, pack them in pouches with an indicator and the date, and load the steriliser without overcrowding it. After the cycle I check the printout or display, make sure the packs are fully dry, and store them in a clean, dry, closed space. Spore testing runs on the schedule our guidelines set, and every load is logged."

"Anything touched with gloved hands during treatment is a clinical contact surface: the light handle, chair controls, the air-water syringe, handpiece hoses, the bracket table, the X-ray tube head, and a keyboard if we use one at the chair. Surfaces that are hard to clean get a disposable barrier, changed after every patient. Everything else that could be touched or splashed is cleaned and disinfected between patients with the practice's approved surface disinfectant, left wet for the full contact time on the label. For the waterlines, I flush them at the start of the day and between patients, use the treatment product the unit maker specifies, and follow the practice's water-testing schedule. For surgical work like removing bone, we use sterile water, not the normal unit supply."

"One Monday we had two toothache emergencies squeezed in, a surgical extraction that ran long, and a patient who arrived half an hour late. Between patients I checked with the dentist on priorities, and we agreed the emergencies would get a quick assessment and relief today and a proper appointment later. I told the front desk how far behind we were so they could warn the afternoon patients and offer to rebook anyone who couldn't wait. I sped up turnovers by having the next tray ready and the X-ray sensor prepped while the dentist finished notes, but I didn't skip any cleaning steps. We finished about twenty minutes late instead of an hour, and nobody left angry."

"Because health changes between visits, and the history decides what's safe to do today. A new medicine or diagnosis can change how the dentist numbs a patient, how much they bleed, or the whole plan. I ask the patient to confirm or update it every time, and I actually read it, not just check it's signed. The things I always point out to the dentist are allergies, especially to latex, antibiotics or anaesthetics; blood thinners; bone medicines such as bisphosphonates, because they can affect healing after extractions; heart conditions or replacement heart valves; diabetes; pregnancy; asthma or epilepsy; and any recent surgery or hospital stay. If there's a latex allergy, I set the room up latex-free before they come in. Then I record that the history was reviewed."

"First I make sure I know which tooth numbering system the practice uses, because a few different ones are used around the world and mixing them up is how the wrong tooth ends up in the notes. During the exam the dentist calls out the tooth, the surfaces and what they see, and I enter it straight away, keeping existing work separate from treatment that's needed. If I'm not sure what I heard, I read it back, like 'upper right six, decay on the mesial and occlusal, correct?' For gum checks I record pocket depths in the order the dentist calls them. I never erase anything. On paper I strike through with a single line, then date and initial it. In software I use the correction feature so there's an audit trail. At the end I check the chart matches what the dentist said."

"We were about to start an extraction, and as I read back the plan I noticed the tooth on the chart didn't match the referral letter. The dentist was already picking up the syringe. I said quietly, 'Before we start, can we double-check the tooth? The letter says lower left six and the chart says lower right six.' He checked, and the chart was wrong, a slip from the exam day. We confirmed with the patient and the X-ray, corrected the record and went ahead. He thanked me afterwards. I kept it calm and factual, and I said it before anything that couldn't be undone. I'd always rather feel a bit awkward than let the wrong tooth come out."

"I'd take the question seriously, because it tells me the patient isn't sure about the plan, and a patient who isn't sure hasn't really agreed to it yet. But I wouldn't give my own opinion on their treatment, because diagnosis and treatment choices are the dentist's job. I'd say something like, 'That's a really good question, and the dentist is the best person to answer it. I'll make sure you get a proper answer before we start.' When the dentist came back, I'd say, 'Mrs Lee has a question about the crown before we begin.' That way she feels heard, the dentist can explain the options, and nothing goes ahead until she's comfortable. I might also offer her the written treatment plan to read again."

"I try not to take it personally, because in a tight room during a hard procedure, a clipped 'suction' usually isn't about me. In the moment my job is to stay calm and keep things smooth, since the patient notices the mood in the room. If it becomes a pattern, say a dentist snapping at me in front of patients, I'd pick a quiet moment afterwards and ask something like, 'The last few preps got tense. Is there anything I could set up differently?' Often there's a real fix, like a different instrument order. With rude patients I stay polite and firm, and I remember that a lot of rudeness in a dental chair is really fear. If someone crosses a line, I'd take it to the practice manager rather than let it carry on."

"I'd tell the dentist right away and stop everything. I'd take anything out of the patient's mouth, like cotton rolls or the suction tip, and lay the chair back flat with their legs slightly raised, which helps blood get back to the brain. I'd loosen anything tight around the neck, talk to them calmly, keep checking they're breathing and responding, and get the emergency kit and oxygen close by. Most people who faint like this come round quickly once they're lying flat. If they don't recover quickly, or there are other signs like wheezing, a rash or swelling, we'd treat it as a medical emergency, follow the practice protocol and call an ambulance. Afterwards I'd write down what happened and the times."

"Swelling with tooth pain can mean an infection that's spreading, so I wouldn't just offer the next free slot. I'd ask how long it's been there, whether it's getting bigger, whether they have a fever, and most importantly whether they have any trouble breathing, swallowing or opening their mouth, or swelling spreading towards the eye or down the neck. If they have breathing or swallowing problems, I'd tell them to go to the hospital emergency department or call an ambulance right now. Otherwise I'd tell the dentist straight after the call, because a patient like this usually needs to be seen today, and we'd make a gap or find an emergency slot nearby. I'd tell the patient what to do if it gets worse before then, and record the call in their notes."

"The exact list depends on local rules, but a practice kit usually has oxygen with masks, a bag and mask for rescue breaths, portable suction, an AED, and emergency medicines such as adrenaline for anaphylaxis, glucose for low blood sugar, an inhaler for asthma, a spray for angina, aspirin for a suspected heart attack, and something for a seizure that won't stop. My job starts before any emergency: I know where it all is, and I help check the oxygen, the AED and the expiry dates on the schedule we keep. When something happens, I follow the dentist's lead. I raise the alarm, bring the kit and the AED, call the ambulance when asked or if nobody has yet, and write down the times and what was given. I keep my CPR training current, and we practise as a team."

"I wouldn't take the X-ray on my own call, and I wouldn't just skip it either. I'd thank her for telling me and let the dentist know before we go any further, because deciding whether an X-ray is needed is the dentist's job. They'll weigh up whether it can wait or whether it's needed now, for example to find the cause of pain or an infection. Dental X-rays are aimed at the mouth, well away from the abdomen, and the dose is small, so the dentist can explain that if she's worried. If we go ahead, I'd use whatever protection our local rules call for and take only the images the dentist asked for, with no avoidable retakes. Then I'd note what she told us and what was decided."

"First, I only take X-rays the dentist has prescribed for that patient, so every image has a reason. Then I keep the dose as low as I reasonably can. That means the right exposure setting for the area and the patient's size, a rectangular collimator if the unit has one, and holders to position the sensor so I get it right first time. Every retake is extra dose, so I check my angles carefully. I use a thyroid collar or other protection where our local rules call for it. For my own safety, I never hold the sensor in the patient's mouth, I stand behind the barrier or out of the beam at the distance the rules set, and I wear my dose badge if the practice issues one. And only staff trained and permitted to take X-rays do it."

"A bitewing shows the crowns of the upper and lower back teeth together on one image, with the patient biting on a tab or holder. It's mainly for finding decay between the back teeth, checking old fillings and seeing the bone level between teeth. A periapical shows one or two whole teeth from the crown right down to the tip of the root, plus the bone around the root end. The dentist uses it for things like a suspected abscess, before a root canal or an extraction, or to look at one painful tooth. Then there's the panoramic, which shows both jaws in one wide image and is useful for wisdom teeth or an overall view. For bitewings and periapicals I use holders with an aiming ring, so the beam lines up and I don't cut off part of the image."