Question 227 · LDEK · Crowding and dental anomalies
Choose correct statements regarding the extraction of teeth in the course of occlusion regulation:
1) teeth considered as less valuable, such as small, damaged, treated endodontically or with amputation, are extracted;
2) extraction of teeth in underdeveloped arch should be avoided;
3) necessity for extraction of first upper premolars occurs in case of deep bites, only in overbite complicated with lack of space for upper canines, and often scissor bite;
4) in secision-making about the necessity of teeth extraction, patient’s face profile is not taken into consideration;
5) lack of space within 4mm is an indication for teeth extraction.
The correct answer is:
2) extraction of teeth in underdeveloped arch should be avoided;
3) necessity for extraction of first upper premolars occurs in case of deep bites, only in overbite complicated with lack of space for upper canines, and often scissor bite;
4) in secision-making about the necessity of teeth extraction, patient’s face profile is not taken into consideration;
5) lack of space within 4mm is an indication for teeth extraction.
The correct answer is:
- A. 1,2,5.
- B. 3,4,5.
- C. 1,2,4,5.
- D. 1,2,3.
- E. 1,2.
Hint
Weigh tooth prognosis, arch development, the effect of extraction on overbite, the facial profile and how much crowding can be solved without extraction.
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