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General information only — not legal advice. Published by Edward & Amaury Solicitors, solicitors regulated by the SRA (no. 800525). How that affects what you read.

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Missed Oral Cancer and Gum Disease Claims

England & WalesLast reviewed 18 September 2026

Dentists screen for oral cancer and gum disease at check-ups, and may be negligent if they miss obvious signs or fail to refer suspicious lesions. You must show earlier action would probably have led to a better outcome, since a below-50% lost chance is not compensable in English law.

Oral Cancer Delays

Direct Answer: A dentist should refer a patient urgently under the suspected cancer pathway when a persistent lesion or other red-flag signs are present, and failing to do so can be negligent if it delayed diagnosis and made treatment less effective.

NICE guideline NG12 lists oral signs, such as unexplained ulceration persisting over about three weeks or a lump, that should prompt an urgent referral. Experts look at what the dentist saw and recorded, whether a reasonable dentist would have suspected cancer, and how the delay affected the stage and treatment.

Because English law does not compensate a reduced chance of a better outcome where the chance was below 50%, causation is critical: the claim must show that with proper care the outcome would probably have been better.

Gum Disease

Periodontal disease is common and treatable. Claims allege failure to carry out or record basic periodontal examination, to diagnose it, to explain treatment and self-care, or to refer when disease was advanced, leading to avoidable tooth loss and complex treatment. The impact of the patient's own oral hygiene and smoking is also weighed.

Records Are Key

Dental records, charts and any photographs or X-rays show what was examined and recorded. Request your full records early, since they are usually decisive evidence in both oral cancer and gum disease claims.

Frequently Asked Questions

Can I claim if my dentist missed oral cancer?

Potentially, if a reasonably competent dentist would have spotted the signs and referred you, and earlier diagnosis would probably have led to a better outcome. Records and expert evidence are central.

What are the warning signs a dentist should act on?

Persistent ulcers, lumps, red or white patches and other unexplained changes in the mouth. NICE NG12 lists the features that should prompt an urgent referral.

Can I claim for untreated gum disease?

Yes, potentially, where a failure to examine, diagnose and treat it caused avoidable tooth loss or harm, though your own oral hygiene and habits will be considered.

What is the loss of chance rule?

English law does not compensate a lost chance below 50% of a better outcome in a personal injury claim (Gregg v Scott). You must show proper care would probably have improved your outcome.

What do I have to prove in a dental negligence claim?

That the dentist's care fell below the standard of a reasonably competent dentist, and that this caused you harm you would not otherwise have suffered. An independent dental expert normally gives evidence on both. A recognised complication of well-performed treatment is not negligent in itself, but a failure to warn you of a material risk can be.

How long do I have to bring a dental negligence claim?

Generally three years from the date of the negligent treatment or, if later, the date you first knew the injury was significant and connected to it. Children have until three years after their 18th birthday. The court has a limited discretion to allow late claims, but you should not rely on it.

Can I bring a dental negligence claim on a no win no fee basis?

Often, yes, if a solicitor thinks the claim has reasonable prospects and is large enough to justify the costs of expert reports. Legal aid is not generally available. Under a Conditional Fee Agreement you pay no solicitor fees if the claim fails, and a success fee capped at 25% of general damages and past losses is deducted if it succeeds.

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Where this applies: This page covers England and Wales. The rules in Scotland and Northern Ireland are different.

Sources for this page

Every rule stated above is based on the primary sources below. Each link goes to the legislation, court rule or regulator itself so you can check it. Last verified 18 September 2026.

  1. Courts and Legal Services Act 1990, s.58 (conditional fee agreements)

    The provision that makes CFAs lawful and enforceable. CFAs derive from this section, not from LASPO.

  2. Conditional Fee Agreements Order 2013, arts. 4–5 · in force from 1 April 2013

    Art. 4 caps the success fee at 100% of base costs. Art. 5 caps what may be taken from damages in personal injury at 25% of PSLA plus past pecuniary loss, net of CRU, at first instance.

  3. Civil Procedure Rules, Part 44 (incl. rr.44.13–44.17, QOCS)

    Qualified one-way costs shifting and its exceptions. Rule 44.14 was amended with effect from 6 April 2023.

  4. Limitation Act 1980, s.11 (personal injury actions)

    Three years from the date of the accident or the date of knowledge. Property damage such as a damaged vehicle is a separate claim with a longer six-year period under s.2.

  5. Limitation Act 1980, s.14 (date of knowledge)

    The three-year period can run from the 'date of knowledge': when you first knew the injury was significant and attributable to the act or omission alleged to be negligent. Central in delayed-diagnosis cases.

  6. Limitation Act 1980, s.28 (extension for disability)

    Time does not run while a person is a child or lacks capacity to conduct proceedings. For a child's personal injury claim the three years generally starts on their 18th birthday.

  7. Limitation Act 1980, s.33 (discretionary exclusion of time limit)

    A court can allow a personal injury claim to proceed out of time where it is equitable to do so. It is a discretion, not a right, and should not be relied on.

  8. NICE NG12 — Suspected cancer: recognition and referral

    Sets out the symptoms and findings that should prompt referral for suspected cancer. Guidance is evidence of good practice, not a binding legal test.

  9. Gregg v Scott [2005] UKHL 2

    English law does not compensate a 'loss of chance' of a better medical outcome in a personal injury claim. A claimant must show on the balance of probabilities that proper care would have led to a better outcome.

  10. General Dental Council — Standards for the Dental Team

    The GDC's standards for all dental professionals, including consent, record keeping, treatment planning, communication and candour. Failing them is evidence relevant to negligence, not the legal test itself.

Who wrote and checked this page

Written and published by
Edward & Amaury Solicitors (Edward & Amaury Ltd, company no. 12195443), regulated by the Solicitors Regulation Authority under no. 800525.
Legal review
Checked for England & Wales by Edward & Amaury Solicitors — Solicitors regulated by the SRA (no. 800525) (verify on the regulator’s register).Review is recorded against the firm. The individual reviewer is not named on this page.
Review dates
Last reviewed 18 September 2026. Next review due 18 March 2027.

Fee rules change. California’s medical malpractice fee limits changed on 1 January 2023, and the QOCS rules in England and Wales changed on 6 April 2023. If you spot something out of date, tell us — we publish corrections.

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Where this applies: This page covers England and Wales. The rules in Scotland and Northern Ireland are different.

Sources for this page

Every rule stated above is based on the primary sources below. Each link goes to the legislation, court rule or regulator itself so you can check it. Last verified 2 August 2026.

  1. Courts and Legal Services Act 1990, s.58 (conditional fee agreements)

    The provision that makes CFAs lawful and enforceable. CFAs derive from this section, not from LASPO.

  2. Conditional Fee Agreements Order 2013, arts. 4–5 · in force from 1 April 2013

    Art. 4 caps the success fee at 100% of base costs. Art. 5 caps what may be taken from damages in personal injury at 25% of PSLA plus past pecuniary loss, net of CRU, at first instance.

  3. Legal Aid, Sentencing and Punishment of Offenders Act 2012, ss.44–46 · in force from 1 April 2013

    Ended recoverability of success fees and ATE premiums from the losing party. Did not create or regulate CFAs.

  4. Civil Procedure Rules, Part 44 (incl. rr.44.13–44.17, QOCS)

    Qualified one-way costs shifting and its exceptions. Rule 44.14 was amended with effect from 6 April 2023.

Who wrote and checked this page

Written and published by
Edward & Amaury Solicitors (Edward & Amaury Ltd, company no. 12195443), regulated by the Solicitors Regulation Authority under no. 800525.
Legal review
This page has not yet been through independent legal review. It is written from the primary sources listed below, which you can check directly.
Review dates
Last reviewed 2 August 2026. Next review due 2 February 2027.

Fee rules change. California’s medical malpractice fee limits changed on 1 January 2023, and the QOCS rules in England and Wales changed on 6 April 2023. If you spot something out of date, tell us — we publish corrections.