Question 181 · LDEK · Craniofacial and occlusal development
Which of the following are characteristic of the dentition of a 3-year-old child?
1) dental arches are hemispheric;
2) line behind the second primary molars is inclined anteriorly (mesial step);
3) I Angle classes are present on molars;
4) 20 teeth are present;
5) occlusal plane is deepened.
The correct answer is:
2) line behind the second primary molars is inclined anteriorly (mesial step);
3) I Angle classes are present on molars;
4) 20 teeth are present;
5) occlusal plane is deepened.
The correct answer is:
- A. 1,2,3,4.
- B. 1,2,4.
- C. 1,3,4,5.
- D. 1,4.
- E. 1,4,5.
Hint
Consider which features have not yet developed at age 3: the mesial step of the terminal plane and the permanent first molars.
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