Why the invoice has more than one line
It helps to stop thinking of “a root canal retreatment” as one product with a price tag. In German dentistry it is a sequence of separately recorded services, and understanding the four blocks lets you read any estimate you are given — ours or anyone else’s.
Block 1 — diagnosis. The examination, sensitivity and biting tests, a two-dimensional X-ray, and in some cases a 3D X-ray (DVT) where a flat image cannot answer the question. This block is small but decides everything that follows.
Block 2 — the retreatment itself. Opening the tooth, removing the old root filling material, removing a post where one is cemented in, locating and cleaning every canal, disinfecting it, an interim dressing between appointments, and the new root filling. Charged per canal, which is why an upper molar with four canals costs more than an incisor with one. The stages are described on our Root canal treatment (endodontics) – service page (EN).
Block 3 — the rebuild. The tooth has a hole in the top and has usually lost substance. It needs at minimum a proper build-up, and a back tooth normally needs a crown (Krone) or a partial crown to stop it splitting.
Block 4 — the follow-up. A check-up with an X-ray, typically after some months, to see whether the inflammation at the root tip is receding.
Most financial surprises come from Block 3. Patients agree to the retreatment, budget for it, and only afterwards learn the tooth still needs a crown. Ask about Block 3 at the same time as Block 2 — always.
What the statutory fund covers, and where it stops
Around 90 % of people in Germany are in statutory health insurance (gesetzliche Krankenversicherung, GKV), which works on the principle of standard care (Regelversorgung): a defined catalogue of services that are sufficient, appropriate and economical. Anything beyond that catalogue is private and must be agreed with you in writing beforehand.
The first root canal treatment
For a tooth being treated for the first time, root canal treatment is in the statutory catalogue — the fund covers the basic pathway: opening the tooth, preparing and cleaning the canals, the root filling, the necessary X-ray checks, the local anaesthetic (Betäubung) and the temporary filling in between.
For molars — the big back teeth — there is a well-known restriction. The treatment guideline (Behandlungsrichtlinie) regards root canal treatment on a molar as indicated “as a rule” where preserving the tooth serves a defined purpose: keeping a complete row of teeth intact, avoiding a situation where the row ends with a gap at the back on one side, or preserving an existing serviceable denture. One general condition applies alongside all of them — the canal has to be negotiable and fillable up to, or almost up to, the root tip (Apex). Importantly, the dentists’ national association (KZBV) and the umbrella body of the statutory funds have stated jointly that those three purposes are examples rather than a closed list: a molar can also be judged worth keeping on other medical grounds. Where none of that applies, the statutory alternative for a molar is removal of the tooth, and keeping it becomes a private decision.
This rule catches expats off guard more than any other in endodontics. It is not that German dentists want to pull teeth — it is that the catalogue defines when saving a molar is a collective expense and when it is a personal one.
The redo
A Revision is a different matter. Where a tooth already carries a root filling and shows changes at the root tip, the guideline points in the first instance towards surgery at the root tip rather than towards reopening the canal. Redoing the root filling from the inside is covered as standard care only in a narrow constellation: the existing filling has to be radiologically not dense or incomplete, and one of the tooth-preservation criteria described above has to apply. Outside that constellation the retreatment is a private service under the dentists’ fee schedule (GOZ), offered to you with a written estimate before anything starts.
Two consequences follow:
1. You will be asked to sign something. Private dental services require a written agreement, signed before treatment, listing what will be done. This is a patient-protection rule, not a sales technique. Read it, take it home, ask questions. 2. The alternative the fund does cover is extraction. That is the uncomfortable centre of this topic, and why the money comparison below matters so much.
What is private in either case
These items sit outside standard care whether it is a first treatment or a redo:
| Item | What it is | Why it is private |
|---|---|---|
| Treatment under a microscope | Magnification and direct illumination inside the canal | Not part of the statutory catalogue, though it is what makes missed canals findable |
| 3D X-ray (DVT) | A three-dimensional image of the tooth and surrounding bone | Only where a flat image cannot answer the question. 178 € in our practice |
| Machine-driven canal preparation | Flexible nickel-titanium instruments in a motor | Beyond the basic catalogue technique |
| Extended disinfection protocols | Additional rinsing solutions, ultrasonic activation, longer working time | Not in the catalogue |
| Rubber dam (Kofferdam) | The sheet that isolates the tooth and keeps saliva out | The exception on this list: in statutory treatment it is not a separate charge, because placing it is included in the covered position for the work on the tooth. A private fee (GOZ 2040) arises only where the statutory service does not require it — alongside a private composite restoration, for instance |
| Special filling materials | Modern sealing materials at the root end | Beyond standard materials |
| Additional appointment time | Complex cases needing longer or more sessions | Standard care assumes a standard effort |
Private services are billed under the fee schedule for dentists (Gebührenordnung für Zahnärzte, GOZ). Each service carries a fixed number of points, one point is worth 5.62421 cents — a value unchanged since 1988 — and the result is multiplied by a factor between 1.0 and 3.5. The factor 2.3 stands for a service of average difficulty and effort; anything above it has to be justified in writing on the invoice with reference to your specific case, and a factor above 3.5 is only possible with a written fee agreement (Honorarvereinbarung) concluded before the treatment begins. This is why two honest invoices for the “same” treatment can differ — and why you may ask what factor is applied and why.
The crown afterwards runs on a different system entirely
Once the canal work is done, a back tooth usually needs covering. Here you leave the world of private agreements and enter the world of the fixed subsidy (Festzuschuss).
For crowns, bridges and dentures the fund does not cover a percentage of your bill. It pays a fixed amount based on the finding in your mouth, and you pay the difference between that amount and the actual cost of what you choose. The subsidy depends on your bonus booklet (Bonusheft):
- no regular stamps — 60 % of the cost of standard care
- booklet complete for 5 years — 70 %
- booklet complete for 10 years — 75 %
- hardship provision (Härtefallregelung) for low incomes — up to 100 % of the standard option
This is where a treatment and cost plan (Heil- und Kostenplan, HKP) comes in. It goes to your fund before the work starts; submit it late and the entitlement to the subsidy can be lost. How long the fund takes to process it varies from fund to fund, so factor that into your timing rather than discovering it afterwards. The mechanics in full are in The Heil- und Kostenplan explained (EN).
The practical takeaway: the retreatment itself is likely to be a private bill you agree in advance, while the crown on top is a mixed bill with a subsidy from your fund. Two different logics, two different pieces of paper, often at the same practice in the same month.
Saving the tooth against replacing it: the comparison that actually decides
This is the calculation patients ask us to do most often, and it deserves honest figures rather than reassurance.
Your fund does not pay towards the implant. It does pay the Festzuschuss towards the crown on top of it — the same fixed amount it would pay for standard care without an implant. For a single missing tooth in 2026 that concrete amount is 552.96 € with no bonus booklet, 645.12 € after five years of stamps, 691.20 € after ten, and 921.60 € under the hardship provision.
Put the two columns side by side and the pattern is usually clear: keeping a restorable tooth is normally the less expensive route, and the one that leaves every future option open. Bridges and dentures are cheaper up front, but a bridge requires grinding down the healthy teeth on either side, which has its own long-term price. Nobody can promise how long any of these will last — what can be said is that a natural root, once removed, is gone.
One forward-looking note: a draft law that passed cabinet on 29 April 2026 proposes reducing the subsidy percentages to 50/60/65 %, keeping the 100 % hardship rate. It has not passed the Bundestag or Bundesrat, so it is a proposal under discussion, not current law. Were it to come into force, the balance would tip further towards saving your own teeth.
If you are privately or supplementarily insured
Private health insurance (private Krankenversicherung, PKV). Your cover comes from your tariff, not from the statutory catalogue — and endodontics is one area where private tariffs are often noticeably generous, since the microscope and modern preparation techniques they reimburse are precisely the items the statutory system treats as extras. You pay the invoice and claim it back. For larger amounts, ask your insurer for written confirmation (Kostenzusage) in advance; practices prepare estimates for exactly this purpose. Check two things in your policy: whether it reimburses up to the highest permitted fee factor, and whether it treats a redo differently from a first treatment.
Supplementary dental insurance (Zahnzusatzversicherung). These typically reimburse between a share set by the tariff of private dental costs, depending on the tariff. Two details decide whether yours will help here: many policies have waiting periods and annual limits in the early years, and almost all exclude treatment for a condition that was already diagnosed or advised when you took the policy out. If a dentist has already told you the tooth needs redoing, taking out a policy this week will not usually cover it.
Students, researchers and the newly arrived. The statutory student tariff gives you the same entitlement as everyone else. If you hold an incoming or expatriate policy taken out abroad, read the dental section closely — many cover emergency pain relief only, which is not the same as a planned retreatment.
Keeping control of the cost: five practical rules
1. Get it in writing before anything starts. A written estimate for the private part, and an HKP submitted to your fund for the crown. Verbal figures are not a plan. 2. Ask what happens if the tooth turns out to be unsaveable once it is opened. A good plan states the fallback and what it would cost. Sometimes that is only known after the first appointment — which is honest, and should still be said out loud. 3. Ask about the crown at the same time as the retreatment. Block 3 is the one that gets forgotten. 4. Keep your Bonusheft stamped. One check-up a year, and the difference between 60 % and 75 % is real money: The Bonusheft: why it is worth starting today (EN). 5. Ask about instalments if the total is difficult. Payment by instalments (Ratenzahlung) is available with us, subject to a credit decision. It is a normal request.
For expats in Düsseldorf, Cologne or Essen, travelling 20 to 30 minutes to discuss all this in English is entirely ordinary — and with a treatment where the paperwork determines what you pay, understanding every line of the estimate beats saving a few minutes on the journey. See English-Speaking Dentist in NRW.
What you should never be charged for — and when to query a line
Usually not as standard care. A first root canal treatment is a statutory benefit under defined conditions, but redoing an existing root filling generally sits outside the catalogue and is offered as a private service with a written estimate you sign in advance. The alternative the fund does cover is removing the tooth — which is exactly why it is worth comparing the two routes properly rather than by reflex.
Because the work is charged by what is actually done, and teeth differ enormously. A lower incisor may have one canal; an upper molar often has four, one of which is genuinely difficult to find. Add the removal of an old post, heavily curved or calcified canals, or an extra appointment, and the effort can double. The number of canals is the single biggest driver.
It is a private add-on, and it is most valuable in exactly the situation described here: a redo, where the question is usually what did the first treatment miss? Magnification and direct light make a missed canal, a crack or a fractured instrument findable. It does not guarantee an outcome, and it should be offered to you as a choice with a reason attached, not as a default line on an invoice.
Some patients ask about combining it with a trip home. Two honest points: aftercare matters in endodontics, since the tooth is reviewed months later and problems tend to surface after the flight home, and your fund’s subsidy for the crown follows different rules for treatment abroad. If you are considering it, read Dental treatment abroad or in Germany? (EN) before booking anything.
Say so — it changes the conversation productively rather than ending it. There is often a staged route: settle the infection first, place a durable temporary restoration, plan the definitive work for later. Instalments are available subject to a credit decision, and on a low income the hardship provision may raise the crown subsidy to 100 % of the standard option. What is not a good plan is silence and a tooth left untreated.
The cost of redoing a root canal is not one number but four blocks — diagnosis, the canal work, the rebuild, the follow-up — and only a written estimate for your specific tooth can tell you the total. In the German system the redo itself is usually private, the crown afterwards is subsidised through the Festzuschuss, and the option your fund fully covers is removing the tooth. That last fact makes it tempting to treat cost as the deciding factor; over ten years, keeping a restorable tooth is normally both the cheaper and the more conservative choice. Get the plan in writing, ask about the crown in the same conversation, keep your Bonusheft stamped, and never agree to a private item you have not seen priced.
Zahnarztpraxis Tsypin · Wuppertal. This article was medically reviewed and is provided for information; it does not replace an examination. Updated August 2026.
