COA COA Radiography & Diagnostic Imaging

Question 1

Which radiograph captures a full panoramic view of all teeth, both jaws, and surrounding structures in a single image?

Accepted Answer

Panoramic (OPG) radiograph

Answer

Periapical radiograph

Answer

Bitewing radiograph

Answer

Occlusal radiograph

Question 2

What is the primary use of a cephalometric radiograph in orthodontic practice?

Accepted Answer

Analyzing skeletal and dental relationships for treatment planning

Answer

Detecting interproximal cavities

Answer

Evaluating periodontal bone levels

Answer

Detecting impacted third molars only

Question 3

Which cephalometric landmark represents the most anterior point of the mandibular symphysis (chin)?

Accepted Answer

Pogonion

Answer

Nasion

Answer

Gonion

Answer

Sella

Question 4

What does the SNA angle measure in cephalometric analysis?

Accepted Answer

The anteroposterior position of the maxilla relative to the cranial base

Answer

The inclination of the lower incisors to the mandibular plane

Answer

The sagittal relationship of the mandible to the maxilla

Answer

The total anterior facial height

Question 5

What is the standard focal-film distance used for cephalometric radiography to minimize magnification?

Accepted Answer

150 cm

Answer

60 cm

Answer

90 cm

Answer

200 cm

Question 6

Which radiation protection items should patients wear during orthodontic radiographs?

Accepted Answer

Lead apron with thyroid collar

Answer

Gloves only

Answer

Lead apron only

Answer

Thyroid collar only