Question 60 · LDEK · Crowding and dental anomalies
Indicate the true statements concerning the persistent tooth:
1) another name for persistent tooth is persistentio dentis;
2) another name for persistent tooth is retentio dentis;
3) it is a primary tooth still present in the oral cavity after its physiological exfoliation time;
4) it is a permanent tooth still present in the oral cavity after its physiological exfoliation time;
5) most frequently observed persistent teeth are lower canines and second upper molars;
6) most frequently observed persistent teeth are primary upper canines and second lower molars;
7) tooth persistence may be caused by a missing primary tooth bud or its pathological position;
8) tooth persistence may be caused by a permanent tooth bud or its pathological position.
The correct answer is:
2) another name for persistent tooth is retentio dentis;
3) it is a primary tooth still present in the oral cavity after its physiological exfoliation time;
4) it is a permanent tooth still present in the oral cavity after its physiological exfoliation time;
5) most frequently observed persistent teeth are lower canines and second upper molars;
6) most frequently observed persistent teeth are primary upper canines and second lower molars;
7) tooth persistence may be caused by a missing primary tooth bud or its pathological position;
8) tooth persistence may be caused by a permanent tooth bud or its pathological position.
The correct answer is:
- A. 1,3,5,7.
- B. 2,4,6,8.
- C. 1,4,6,7.
- D. 1,3,6,8.
- E. 2,3,5,7.
Hint
Distinguish persistence from retention, primary from permanent teeth, and think about what usually lies beneath a retained primary tooth.
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