MDS PREP
When diagnosing a fracture of the mandible, an occlusal X-ray is particularly useful for the diagnosis of
1. symphysis fractures
2. subcondylar fractures
3. angle fractures
4. ramus fractures
Radiology
Answer: 1
An intraoral periapical X-ray is taken for evaluation of impacted third molar. Another X-ray is taken with downward angulation to first one. If third molar is lingual impaction it will appear to
1) Move downward in relation to inferior alveolar canal
2) Move upward in relation to inferior alveolar canal
3) Be stable in relation to inferior alveolar canal
4) None of the above
Radiology
Answer: 1
Which of the following resembles caries in radiographs?
1. Zinc oxide eugenol
2. Zinc phosphate
3. GIC
4. Polymethyl methacrylate
Radiology
Answer: 4
Cervical burnout refers to
1. Cementoenamel junction misidentified as caries
2. Sun burns caused on neck
3. Root surface caries at cementoenamel junction
4. None of the above
Radiology
Answer: 1
Sensitivity of a body tissue to radiation is dependent on
1) Blood flow
2) Mitotic rate of cells
3) Iron content
4) Protein content of cells
Radiology
Answer: 2
What is the function of filtration process while taking radiographs?
1) Remove the short wavelength photons
2) Remove the portion of long wavelength photons
3) To increase the radiation dose to patient
4) None of the above
Radiology
Answer: 2
X-rays were discovered in
1. Nov 1897
2. Oct 1985
3. Nov 1895
4. Nov 1890