Why wisdom teeth are their own problem
Wisdom teeth arrive last, into a jaw that has usually run out of room — hence the familiar situations: a tooth lying on its side, one wedged against its neighbour, one buried in bone, one half-erupted under a flap of gum that keeps becoming inflamed.
The complication specific to the lower jaw is anatomical. The inferior alveolar nerve (Nervkanal, Nervus alveolaris inferior) runs through the bone of the lower jaw and supplies sensation to the lower lip and chin. Lower wisdom teeth develop directly above that canal: in some people the roots stop several millimetres short of it, in others they touch it, in a few they wrap around it.
That relationship is the most important piece of information before a lower wisdom tooth is removed, because injury to the nerve causes numbness of the lip and chin — usually temporary, occasionally long-lasting. Everything the imaging does comes back to reducing that risk.
What a panoramic image can — and cannot — tell you
The panoramic X-ray (OPG, Panoramaschichtaufnahme) is the standard first image and often the last one needed. It shows the position and angulation of the wisdom teeth, the shape of the roots and the line of the nerve canal.
What it cannot show is depth. Everything is projected onto one plane, so a canal running along the cheek side of the roots and one running directly through them can look identical.
There are recognised signs that tooth and canal are closely related — the root appearing darker where the canal crosses it, the white lines of the canal interrupted, the canal bent out of course, or the root narrowing or hooking at the tip. Radiological guidance treats these as reasons to clarify the relationship, not as proof that anything will go wrong.
What actually changes when the nerve turns out to be close
The tooth comes out differently. A tooth sitting on the nerve is generally divided into sections and lifted out piece by piece rather than levered as a whole, so no force is directed downwards. Bone removal is planned and kept minimal.
The direction of work changes. Whether the canal lies towards the cheek or the tongue determines from which side the tooth is approached and where instruments must not go.
The conversation beforehand becomes concrete. Instead of a generic warning about “possible numbness”, you hear what your own anatomy looks like and what it means for the likelihood of temporary altered sensation.
Occasionally the plan itself changes. Where roots are genuinely entangled with the canal, a technique that removes only the crown and deliberately leaves the root tips undisturbed (coronectomy) may be discussed in selected cases, with its own follow-up requirements.
And often the scan is reassuring. Many show more distance than the panoramic image suggested, turning an operation everyone was nervous about into a straightforward one.
None of this eliminates risk. Careful planning reduces the likelihood of a complication; it does not abolish it, and no honest practice will promise otherwise.
The upper jaw: a different neighbour
Upper wisdom teeth sit close to the maxillary sinus (Kieferhöhle), the air-filled space above the upper back teeth; the roots can end just below its floor or project into it. The practical consequences are a possible opening between mouth and sinus during removal — usually recognised immediately and closed at the same appointment — and, rarely, a root fragment displaced into the sinus.
A 3D scan is therefore worth taking where the panoramic image suggests roots and sinus floor are intimately related, or where a tooth is deeply buried or awkwardly positioned. For most straightforward upper wisdom teeth, none is needed at all.
When a 3D scan is genuinely not required
German radiation protection law requires a justifying indication (rechtfertigende Indikation) for every X-ray: it may only be taken where there is a specific question it will answer, and where the answer changes what is done.
If a scan is proposed, ask what it should show and what would be done differently depending on the answer. A good answer exists in most difficult wisdom tooth cases — and does not exist in easy ones. The comparison between the two kinds of image is in 3D X-ray or a normal dental X-ray — which do you need?; the radiation question is dealt with in Is a 3D X-ray dangerous? What the radiation really means.
Cost, and who pays what
The scan. At our practice a DVT costs 178 €, quoted before it is taken — see 3D X-ray (DVT) – service page (EN). It is generally billed as a private service under the fee schedule for dentists (GOZ), including for patients with statutory insurance: imaging and surgery can follow different rules, which surprises many international patients. Whether a private or supplementary policy contributes depends on the tariff, so ask beforehand — details in Does statutory health insurance pay for a 3D X-ray?.
The removal itself. What your fund covers and what is billed privately should be clear before the day. Ask for it in writing; that is a normal request here, not a sign of distrust. Your first consultation with us is free, including the discussion of whether a scan is needed at all.
What is normal afterwards — and when to contact us
Most have straightforward explanations and straightforward treatment. What they share is being worth a phone call rather than a weekend of waiting.
Special situations
Anxiety. Wisdom tooth surgery is one of the appointments people dread most. Sedation and laughing gas (Lachgas) are available with us, and the scan itself means standing still for a few seconds.
Medication. Blood thinners, osteoporosis medication, immune-suppressing treatment and some cancer therapies all affect surgical planning. Bring the packaging or a current list.
Pregnancy. X-rays are avoided unless there is a compelling reason, and non-urgent surgery is postponed. Tell us before any imaging if you are pregnant or might be.
Smoking. Smoking is associated with slower healing and a higher risk of a painful complication in the socket — said plainly and without lecturing.
If you are new to Germany. No referral (Überweisung) is needed to have wisdom teeth assessed. Images taken elsewhere, including abroad, can often be used if recent and of adequate quality — bring the file or a disc, not a phone photograph of a screen. And if the vocabulary of nerves, consent and complications is not something you want to navigate in German, we treat patients in English every day, alongside German, Russian, Turkish, Ukrainian, Arabic, Kurdish and French: English-Speaking Dentist in NRW. Patients come to us from across Wuppertal and the neighbouring towns for exactly that.
No, and be wary of anyone who says it does. It shows where the nerve is, so the surgery can be planned to avoid it. That reduces the risk; it does not remove it.
Yes — nothing is imaged without your consent. Ask first what exactly is unclear on the existing images and what would change with the answer, then decide with that information rather than on principle.
Practice and equipment vary internationally. The German framework is explicit: a 3D scan needs a justifying indication, so it should be proposed where a specific question requires answering — typically a close relationship to the nerve canal — not as a routine step.
Seconds. You stand or sit, bite gently on a positioning aid and keep still while the device rotates once around your head. No injection, nothing enclosed, nothing to feel afterwards.
Usually not — the nerve question belongs to the lower jaw. Upper teeth raise the sinus question instead, which is only worth a 3D image where the panoramic picture suggests roots and sinus floor are closely related.
A 3D scan before wisdom tooth removal is neither a routine extra nor a luxury — it is a targeted answer to one anatomical question, usually about the nerve in your lower jaw. Where the panoramic image is unambiguous, taking one adds nothing. Where it shows tooth and canal in close contact, the scan changes how the operation is carried out and what you can realistically be told beforehand. The sensible approach is neither to demand one nor to refuse on principle, but to ask what it should show — then decide together.
Zahnarztpraxis Tsypin · Wuppertal. This article was medically reviewed and is provided for information; it does not replace an examination. Updated August 2026.
