Question 108 · LDEK · Crowding and dental anomalies

The impaction of which permanent tooth is most often observed after a premature loss of deciduous teeth as a result of spontaneous migration of teeth and insufficient space in the dental arch?

1) upper canine;
2) lower canine;
3) first lower premolar tooth;
4) second lower premolar tooth;
5) first upper premolar tooth;
6) second upper premolar tooth.
The correct answer is:
  1. A. 1,3,5.
  2. B. 1,4.
  3. C. 2,4.
  4. D. 2,5,6.
  5. E. 4,5,6.
Hint

Consider which permanent teeth erupt last into their segment and are therefore most easily blocked when neighbours drift into the gap.

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