Question

Degrees of ANB and their skeletal class are _____.

a) Class I: 1-4°, Class II: 5-9°, Class III: -1 to -4°
b) Class I: 5-9°, Class II: 1-4°, Class III: -1 to -4°
c) Class I: -1 to -4°, Class II: 1-4°, Class III: 5-9°
d) Class I: 1-4°, Class II: -1 to -4°, Class III: 5-9°

Answer 1

The degrees of ANB angle corresponding to skeletal classes are Class I: 1-4°, Class II: 5-9°, and Class III: -1 to -4°, which is option 'a'.

Step-by-step explanation:

The degrees of ANB (the Angle formed by the points nasion, A-point, and B-point) and their corresponding skeletal classes are part of cephalometric analysis, which is used in orthodontics to assess skeletal relationships. The correct degrees for skeletal class are:

• Class I: ANB angle between 1-4°
• Class II: ANB angle between 5-9°
• Class III: ANB angle between -1 to -4°

Therefore, the answer to the question is option 'a' which corresponds to Class I: 1-4°, Class II: 5-9°, Class III: -1 to -4°.