Question 223 · LDEK · Prevention and early treatment
Choose correct statements regarding premature loss of primary teeth and its consequences in developmental period:
1) loss of lateral maxillary teeth may lead to development of crossbite on this side;
2) loss of maxillary incisors may lead to distocclusion;
3) early loss of second primary molar, before the eruption of first permanent molar, causes lack of space for second premolar and its eruption outside the dental arch;
4) loss of primary canine does not influence the positioning of anterior teeth;
5) loss of second primary molar after full eruption of first permanent molar, causes rotation of first upper molars and lingual and mesial inclination of first lower molars.
The correct answer is:
2) loss of maxillary incisors may lead to distocclusion;
3) early loss of second primary molar, before the eruption of first permanent molar, causes lack of space for second premolar and its eruption outside the dental arch;
4) loss of primary canine does not influence the positioning of anterior teeth;
5) loss of second primary molar after full eruption of first permanent molar, causes rotation of first upper molars and lingual and mesial inclination of first lower molars.
The correct answer is:
- A. 1,2,5.
- B. 1,4,5.
- C. 1,3,5.
- D. 2,3,4.
- E. 2,3,5.
Hint
For each early loss, think which neighbouring teeth drift into the gap and in which direction.
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