MDS PREP
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
Explanation: Cervical burnout is an optical illusion that occurs on dental radiographs, where the area around the cementoenamel junction appears darker due to the difference in density between the enamel and the underlying dentin. This can lead to misinterpretation as caries.
In radionuclide imaging the most useful radiopharmaceutical for skeletal imaging is
1. Gallium 67
2. Technetium-sulphur-colloid
3. Technetium-99m
4. Technetium-99m linked to Methylene disphosphonate
In radionuclide imaging, the most useful radiopharmaceutical for skeletal imaging is Technetium-99m linked to Methylene diphosphonate.
The target of the X-ray tube is angulated to produce all the following effects except
1. To decrease the effective focal spot
2. To increase the image sharpness
3. to energize the photons
4. To dissipate heat
Radiology
Answer: 3
The target of the X-ray tube is angulated to produce all the following effects except to energize the photons.
The sialographic appearance of a normal salivary gland is
1. Branching with bloom
2. Branching with leaves
3. Branchless with fruit-laden
4. Branchless with leaves
Radiology
Answer: 1
The sialographic appearance of a normal salivary gland is branching with bloom.
For detection of pathology in both Stenson"s and Wharton"s duct after sialogram, indicated radiographic view is
1. PA view
2. Caldwell
3. Panoramic
4. CT scan
Radiology
Answer: 3
For detection of pathology in both Stenson's and Wharton's duct after sialogram, the indicated radiographic view is panoramic.
Characteristic of screen film used for cephalometric radiograph
1. High contrast, medium-speed
2. Low contrast, faster speed
3. Low contrast, wide latitude
4. High contrast, high speed
Radiology
Answer: 3
Characteristic of screen film used for cephalometric radiograph is low contrast, wide latitude.
The extraoral radiograph that best demonstrates the subcondylar portion of mandible is the (neck of the condyle)
1. AP mandible
2. Waters view
3. Towne"s view
4. Submental vertex
Radiology
Answer: 3
The extraoral radiograph that best demonstrates the subcondylar portion of the mandible is Towne's view.
Lateral cephalogram is used for all of the following except
1. To assess where excessive growth is occuring
2. To compare the growth patterns with previous radiograph
3. To assess level of posterior alveolar bone
4. To assess soft tissue profile
Radiology
Answer: 3
A lateral cephalogram is used to assess the level of posterior alveolar bone.