ABO (Reading) 2

Question 1

In the ABO Written Examination, which reference domain covers the biological basis of tooth movement including periodontal ligament response to force?

Accepted Answer

Biomechanics and biology

Answer

Tooth movement biology and periodontal ligament force response fall under the biomechanics and biology domain.

Question 2

According to standard orthodontic literature, what is the optimal light continuous force range generally cited for bodily tooth movement?

Accepted Answer

50-100 grams

Answer

Light continuous forces around 50-100 grams are commonly cited as optimal for efficient bodily movement.

Question 3

The ABO Case Report Exam evaluates finished cases partly through which standardized scoring instrument?

Accepted Answer

Discrepancy Index and Cast-Radiograph Evaluation

Answer

ABO uses the Discrepancy Index for case complexity and the Cast-Radiograph Evaluation for finished-case quality.

Question 4

Which cephalometric angle is most directly used to assess the anteroposterior relationship between maxilla and mandible?

Accepted Answer

ANB angle

Answer

The ANB angle expresses the sagittal relationship between the maxilla (A point) and mandible (B point).

Question 5

In reading periapical radiographs for orthodontic assessment, external apical root resorption appears as which finding?

Accepted Answer

Blunted or shortened root apices

Answer

External apical root resorption presents radiographically as blunting or shortening of the root apex.

American Board of Orthodontics (ABO) Practice Test

American Board of Orthodontics (ABO) Practice Test

ABO (Reading) 2