Mental Capacity Act — MFDS Part 1 MCQ

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ModerateEthics & ProfessionalismMental Capacity ActMFDS Part 1

A 17-year-old patient in Wales may be unable to make a specific decision about proposed dental treatment because of an impairment of the mind or brain. Which statement best describes the general age and territorial scope of the Mental Capacity Act 2005 relevant to the dentist’s assessment?

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Reveal the answer and explanation

Correct answer: E — It applies from 16 years of age in England and Wales

Explanation lettering: E = shown as A · A = shown as E

A is correct. For treatment-capacity decisions, the Mental Capacity Act 2005 generally applies to people aged 16 years and over in England and Wales. A 16- or 17-year-old must therefore be presumed to have capacity unless a decision-specific assessment establishes otherwise; if capacity is lacking, treatment decisions may be made in the young person’s best interests under the Act. The threshold is not 18, although certain provisions, such as making a lasting power of attorney or an advance decision to refuse treatment, require the person to be 18. The Act does not generally govern treatment decisions for all children under 16, for whom Gillick competence and other child-law principles are relevant. It is not limited to England and does not extend throughout the UK because Scotland and Northern Ireland have separate legal frameworks.

Reference: NHS England. Guidance to support implementation of the Mental Capacity Act in all NHS commissioned settings for adults with a learning disability, sections ‘Legal context’ and ‘16 and 17-year olds’. Updated 17 June 2026. https://www.england.nhs.uk/long-read/guidance-to-support-implementation-of-the-mental-capacity-act-in-acute-trusts-for-adults-with-a-learning-disability/