ANB in Class II.. increase

ANB in Class II:

• A- increase.
• B- decrease.
• C- same ANB is angle between SNA and SNB.

In Class II malocclusion, the ANB angle is increased compared to the normal range seen in Class I.

Here's a breakdown of the options:

A. Increase:

This is the correct answer. In Class II, the maxilla (upper jaw) is positioned forward compared to the mandible (lower jaw), leading to an increased ANB angle.

B. Decrease:

This is incorrect. A decrease in ANB indicates a Class I or Class III skeletal pattern, not Class II.

C. Same ANB is angle between SNA and SNB:

This is partially correct. The ANB angle is the angle between the SNA (sella-nasion-A point) and SNB (sella-nasion-B point) lines on a cephalometric radiograph. However, the statement doesn't consider the specific range of ANB values for different skeletal patterns.

summary:

So, to summarize:

• In Class II malocclusion, the ANB angle is increased compared to the normal range seen in Class I.
• The normal range for ANB in adults is typically considered to be 0° to 4°.
• ANB is a valuable indicator of the anteroposterior relationship between the maxilla and mandible.