A “guarantee” is a contractual promise that sets out what you are offered if treatment fails. It is not the same as medical follow-up, your legal rights or complication insurance. Its value depends on what the written text covers, for how long, on what conditions and at whose expense.
Slogans such as “lifetime guarantee” or “100% assurance” have no legal content without the written terms. In Türkiye the dentist's legal responsibility may also be judged differently depending on the nature of the treatment (improvement or a promised result), and that distinction matters regardless of any guarantee document.
Four separate concepts
| Concept | What it means | Where it comes from |
|---|---|---|
| Guarantee | The organisation's promise to offer something, such as repair, renewal or a refund, if treatment fails | The contract and the guarantee document |
| Your legal rights | Careful treatment, information, and legal options when there is a defect | Legislation and law (by country) |
| Complication insurance | Costs of a treatment complication met by an insurer | An insurance policy. In Türkiye compulsory for operating-theatre surgery (2025 Regulation); coverage of dental procedures is unclear |
| Medical follow-up | Check-ups and aftercare | The follow-up plan (see the aftercare page) |
A guarantee often requires regular check-ups, but it does not replace the check-ups themselves. A guarantee may not be a free medical service, only a promise of correction subject to conditions.
Turkish law: two kinds of logic
According to legal sources, in Turkish law the dentist–patient relationship can be treated, depending on the nature of the treatment, as a mandate (Turkish Code of Obligations arts. 502 ff.: the dentist owes careful effort, not a result) or a contract for work (arts. 470 ff.: the dentist owes delivery of a particular result). These sources say:
Mandate (effort)
- Fillings.
- Root canal treatment.
- Extractions.
- Gum treatment.
- Treatments aimed at improving health.
Contract for work (result)
- Dentures.
- Crowns and bridges.
- Restorations on implants.
- Veneers and coatings.
- Cosmetic work that promises a result.
For work treated as a contract for work, the customer (the patient) is said to have a choice of rights when there is a defect, for example free repair, a reduction in price or withdrawal from the contract. Which right can be used under which conditions needs legal review. As an example of this approach, a Court of Cassation decision is cited as treating denture and implant treatment as a contract for work (3rd Civil Chamber, E.2015/12780, K.2016/5642, reported by a secondary source).
Important reservations
- According to academic studies, where a dental intervention falls (work or mandate) is not set by clear lines. The nature of the contract depends on the content and dominant purpose of the intervention.
- A lawyer has said that a guaranteed result cannot be promised in medical practice, but where the patient was not adequately informed and a guaranteed result was given, courts can treat it as a contract for work (news report).
- News reports say courts can take social media promises, advertisements and messages into account as evidence, so keep written and visual promises.
- It is said that consumer courts have jurisdiction over disputes with private clinics and practices, and that the court of the consumer's residence may also have jurisdiction (secondary source; how this applies to foreign patients depends on the case, so take legal advice; see the complaints page).
- One academic study reports that in the Court of Cassation's dental malpractice decisions, 83.3% of cases arose in private businesses (private clinics, practices, private hospitals), and that patients most often complained about dentures (25%) and implants (18.8%). This is a sample of court decisions. It does not show the rate of problems across all dental treatment in Türkiye.
What to look for in the guarantee text
Tick items off as you confirm them. Your ticks stay in this browser only.
Terms often seen in sample guarantees
This section points to no particular organisation. It summarises wording that recurs in guarantee terms published on clinic sites in several countries.
| Common term or exclusion | What it can mean | What to do |
|---|---|---|
| A regular check-up is required (for example at least once or twice a year, in some examples every 3–6 months) | The guarantee is void if check-ups are missed | Learn the frequency and place in writing beforehand |
| Smoking, vaping or tobacco use excluded | If you smoke, the guarantee may not apply at all | Say so openly and ask about the scope in writing |
| Teeth grinding (bruxism) and use of a protective splint | Excluded if a splint was advised but not worn | Get the dentist's advice in writing and follow it |
| Systemic illness (uncontrolled diabetes, some medicines) | Excluded | Report your general health accurately and ask whether a written sign-off is needed |
| A “risky prognosis” known before treatment | If the dentist said at the start that it might not last, the guarantee is void | Ask for the prognosis to be recorded in writing |
| Work by another clinic | The guarantee is void | Apart from emergency or standard local care, tell the organisation first |
| Root canal treatment excluded | A crown is guaranteed, but a root canal that later becomes necessary is not | Ask the cost of extra procedures that may be needed later |
| Fracture of the natural tooth excluded | The restoration is guaranteed, not the natural tooth beneath | Ask which structures are covered |
| Travel and accommodation excluded | You pay to go back for a correction | Add it to your budget; it may be negotiable |
| No refund, only repair or renewal | No money back | Look at the contract's separate refund or withdrawal terms |
| A condition that “all treatment was done at the same clinic” (for example graft, implant and crown) | The guarantee is void for split treatment | Make sure every procedure is covered |
| “Contact the organisation before making a claim” | Going to another dentist first may cost you the right | Apart from an urgent health problem, notify in writing first |
| Some organisations give no guarantee on dentures at all | A university dental hospital form states this openly | If there is none, ask why and about your legal rights |
The terms in this table are examples gathered from clinic sites. None is a recommendation of an organisation, and their legal validity varies by country.
A view from the UK: guarantee versus legal rights
According to a summary by a UK law firm, a guarantee is a contractual agreement that gives the patient something to claim on if treatment fails. How the terms are written decides the outcome, and a guarantee can create obligations beyond the patient's rights under general law. Under GDC standards, dentists are expected to tell patients clearly whether treatment is guaranteed and, if so, what it covers and excludes. This is not a rule that applies in Türkiye. It is an example of the questions patients should ask.
The practical limits of a guarantee in treatment abroad
- The need to travel: a guarantee often means going back to the centre, and the cost and time may fall on you.
- The local dentist's role: a local dentist may not want to correct treatment done abroad, or correcting it may void the guarantee.
- The organisation's existence: a guarantee is worth only as much as the organisation that gives it. News from the US includes dental clinics that took advance payments and then closed, harming patients. A written guarantee is not enough; how you pay and how reliable the organisation is also matter.
- Language and jurisdiction: it may be unclear in which language and under which law the guarantee is read.
- “Lifetime” wording: if it does not define whose lifetime and which restoration, it has little legal value.
If you need to use the guarantee
- Health first. With pain, swelling or signs of infection, go to a local dentist or an emergency department (see the aftercare page).
- Re-read the guarantee and its terms. Check the period, conditions and notice procedure.
- Notify in writing: the problem (date, symptoms, photographs, X-rays, your local dentist's written opinion) and what you ask for (repair, renewal, and so on) to the treating organisation and the agency.
- Before going to another clinic, check what the guarantee says. Apart from an urgent health problem, tell the organisation first.
- Document the reply and the timing. If there is no reply, use the call centre and the other routes (see the complaints page).
- If travel is needed, settle in writing who pays travel and accommodation.
- Get legal advice if the guarantee is refused or there is serious harm. Time limits vary between routes.
Guarantee and complication insurance
The 2025 Regulation makes complication insurance compulsory for surgical and interventional procedures carried out in an operating theatre under health tourism (transition period to 31 December 2025). It is not clear whether dental procedures fall within this. Ask the organisation in writing which procedures and complications the insurance covers, up to what limit, and how you would claim on it. Insurance does not replace a guarantee: a guarantee is the organisation's own promise, while insurance is assurance from a third company.
Frequently asked questions
Is a “lifetime guarantee” really for life?
It depends on the written terms. Ask which restoration, under what conditions and whose lifetime it applies to. Most guarantees depend on check-ups and maintenance.
With a guarantee, can I get my money back if there is a complication?
Most guarantees offer repair or renewal, not a refund. A refund needs a separate contract term. Consumer law routes are on the complaints page.
If I have no guarantee document, do I have no rights?
A guarantee is an extra contractual assurance. Your legal rights (careful treatment, options when there is a defect) can be assessed apart from any guarantee document. Ask a lawyer.
What if the organisation refuses the guarantee?
Ask for written reasons, keep your documents, contact the call centre and the relevant bodies, and take legal help if needed (see the complaints page).
If an agency gives the guarantee, whom do I claim against?
Make clear in writing who gives the guarantee and against whom it applies. The facility and the agency are separate legal entities.
Sources
- Faulty dental treatment: contract for work and mandate (law firm, secondary)
- Faulty dental treatment and choice of rights (law firm, secondary)
- Malpractice in dentistry, mandate versus work (legal guide, secondary)
- Court of Cassation 3rd Civil Chamber, E.2015/12780 K.2016/5642 (secondary report)
- Legal liability of the dentist in implant treatment (academic thesis)
- Nature of the contract in a dentist's aesthetic interventions (academic thesis)
- The dentist's liability in aesthetic procedures and Court of Cassation decisions (academic)
- Dental malpractice cases in Türkiye: Court of Cassation decisions (academic)
- Cosmetic surgery, promises and contract for work (news)
- Dental guarantees (UK law firm; GDC expectations)
- GDC Standards for the Dental Team, principle 3
- University dental hospital form (no guarantee on denture lifespan)
- Regulation summary (complication insurance)
- US news: clinic closure and advance payments
- US news: settlement with a dental practice accused of false charging