Permanent Tooth Eruption — MFDS Part 1 MCQ

Instant feedback + full explanation. One question, done properly.

EasyPaediatric Dentistry PrinciplesPermanent Tooth EruptionMFDS Part 1

At approximately what age does the first permanent molar usually erupt into the oral cavity?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — 6 years

The correct answer is A: 6 years. First permanent molars usually erupt at approximately 6 years of age, with normal eruption commonly described as occurring around 6–7 years. They emerge distal to the second primary molars and do not replace primary teeth, so parents may overlook them as permanent teeth. Four years is too early for normal first permanent molar eruption, while 8, 10 and 12 years are progressively later than the usual eruption interval. Twelve years is more characteristically associated with eruption of the second permanent molars. Individual variation occurs, but 6 years is the single best answer among the options provided.

Reference: Newcastle upon Tyne Hospitals NHS Foundation Trust. Molar Incisor Hypomineralisation (MIH) in your child’s teeth. Updated 20 January 2026. https://www.newcastle-hospitals.nhs.uk/resources/molar-incisor-hypomineralisation-mihin-your-childs-teeth/