Honestly, very little. A check-up is one of the lowest-risk appointments in healthcare. It is an examination, and usually a clean, with no drilling, surgery or anaesthetic involved. The few things that can happen are minor and temporary: your gums might feel tender or bleed a little during a clean, your teeth might be briefly sensitive afterwards, or you might gag during x-rays. Serious complications are rare. By far the biggest risk around check-ups is not having them, because that is what lets real problems grow unnoticed.
Why a check-up is so low risk
Most of what people worry about at the dentist comes from treatment, like fillings, extractions or root canals. A check-up is none of that. Your dentist looks at your teeth and gums, checks your bite, does a quick oral cancer check, and often cleans your teeth. Nothing about that is invasive, so there is very little that can go wrong. If it is your first visit in a while, our guide on what to expect at a check-up walks through each step.
Minor things that can happen, and how they are handled
If anything comes up during a routine check-up, it is almost always one of these, and all are easily managed:
- Tender or bleeding gums during a clean. If your gums are already inflamed, cleaning them can cause a little bleeding. This is a sign of gum disease, not of harm, and it settles as your gums get healthier.
- Temporary tooth sensitivity. After a scale and clean, some people notice brief sensitivity to hot and cold. It usually fades within a few days, and a sensitive toothpaste helps. Our guide on tooth sensitivity covers when it is worth a closer look.
- Gagging during x-rays or the exam. A sensitive gag reflex can make x-rays or the back-of-mouth check briefly uncomfortable. Tell your dentist, because there are simple ways to make it easier.
- Feeling anxious or lightheaded. Nerves can make some people feel faint. If the dentist makes you anxious, say so, and see our tips on coping with dental anxiety.
- A loose filling or crown coming away. Occasionally, an old restoration that was already failing can come loose during a clean. It is uncommon, and it means that restoration needed replacing anyway.
- A rare reaction to materials. Reactions to things like latex gloves or fluoride are rare, which is why your dentist asks about allergies first.
Are dental x-rays safe?
Yes. Dental x-rays use a very low dose of radiation, and they are considered safe for most people. You are given a lead apron, the dentist steps away while the image is taken, and it lasts only a second or two. X-rays are only taken when they are actually needed, not as a routine at every visit.
The main exception is pregnancy. X-rays are generally avoided during pregnancy unless it is an emergency, so always tell your dentist if you are pregnant or think you might be. Our guide to dental x-rays explains what they show and why they are used.
What to tell your dentist beforehand
Most complications are avoided simply by giving your dentist the full picture before they start. Let them know if you:
- Are pregnant, or think you might be
- Have a heart condition or an artificial joint, as some conditions need antibiotics before certain dental work
- Take blood thinners or have a bleeding disorder
- Have any allergies, including to latex or medications
- Feel anxious about dental visits
None of these stop you having a check-up. They just help your dentist tailor the visit and keep it safe.
What almost never happens
Serious harm from a routine check-up is very rare. There is no surgery, no general anaesthetic, and nothing that puts you at real risk. Sometimes a check-up uncovers a problem you did not know about, like a cavity or early gum disease, but that is the check-up doing its job, not something going wrong. Finding an issue early is exactly how you avoid the bigger, riskier treatment later, as our post on the early signs of gum disease shows.
Frequently asked questions
Is it normal for my gums to bleed during a clean? Yes, if your gums are already inflamed. Bleeding during a clean is a sign of gum disease rather than of any harm, and it usually improves once you have had a professional clean and improved your home care.
Are dental x-rays dangerous? No. Dental x-rays use a very low dose of radiation and are considered safe for most people, and you are protected with a lead apron. They are only taken when needed, and they are generally avoided during pregnancy unless it is an emergency.
Can a dental check-up damage my teeth? No. A check-up involves no drilling or treatment, so it does not damage healthy teeth. If an old filling or crown comes loose during a clean, it was already failing and needed replacing, which the check-up simply brought to light.
