Tooth development: accessional teeth: practice question

A Dentistry question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Dentistry · Tooth development: accessional teeth

Sample item

Permanent molars develop from distal extension of the dental lamina and have no deciduous predecessors. What are such teeth called?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Accessional teeth

Permanent molars are accessional (non-succedaneous) teeth. Succedaneous teeth are permanent teeth that replace deciduous ones, namely the incisors, canines and premolars.

Option by option

  • A. Supernumerary teeth

    Supernumerary teeth are extra to the normal series.

  • B. Succedaneous teeth

    Succedaneous teeth replace a deciduous tooth.

  • C. Natal teeth

    Natal teeth are present at birth.

  • D. Accessional teeth (correct)

    Correct. Molars add to the arch without replacing a tooth.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Dentistry question

What is the answer to this Dentistry question?

The best answer is D, Accessional teeth. Permanent molars are accessional (non-succedaneous) teeth.

Why is "Supernumerary teeth" not the answer?

Supernumerary teeth are extra to the normal series.

Why is "Succedaneous teeth" not the answer?

Succedaneous teeth replace a deciduous tooth.

Why is "Natal teeth" not the answer?

Natal teeth are present at birth.

What concept does this question test?

It tests Tooth development: accessional teeth in Dentistry. Succedaneous teeth are permanent teeth that replace deciduous ones, namely the incisors, canines and premolars.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Tooth development: accessional teeth?

Learn the dental formula, eruption ages and tooth structure once, as tables. Then use the flashcards and the other Dentistry questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.