MDS PREP
Internal derangement of the TMJ can be best diagnosed by
1. MRI
2. CT scan
3. Arthrography
4. Panoramic view
Radiology
Answer: 1
Internal derangement of the TMJ can be best diagnosed by MRI.
Salt-paper appearance is seen in intraoral periapical radiograph of
1) Thalassaemia
2) Sjogren"s syndrome
3) Periodontal abscess
4) Osteoporosis
Radiology
Answer: 1
The "salt-paper" appearance in intraoral periapical radiographs is often associated with thalassemia due to changes in the bone structure.
In thalassaemia, particularly in the case of thalassaemia major, there can be
changes in the bone structure due to marrow hyperplasia and compensatory
changes. This can lead to a "salt-and-pepper" or "salt-paper" appearance on
radiographs, which is characterized by a mottled pattern of radiolucency and
radiopacity in the bones, including the jaw.
Osteoporosis can lead to generalized bone loss and may show decreased bone
density on radiographs
A periodontal abscess typically presents as a localized radiolucency around
the root of a tooth on radiographs
Sjogren's syndrome primarily affects the salivary and lacrimal glands,
leading to dry mouth and dry eyes
Which of the following is the correct sequence of dark room processing of a radiograph
1) Rinsing, fixing, developing, washing and drying
2) Developing, rinsing, fixing, washing and drying
3) Washing, fixing, developing, drying and rinsing
4) None of the above
Radiology
Answer: 2
The traditional darkroom processing sequence for radiographs is as follows:
Developing: This step involves immersing the film in a
developing solution to reveal the latent image captured on the film.
Rinsing: This step is crucial to halt the development
process, preventing further exposure to the chemical in the developer.
Fixing: The film is then placed in the fixer solution
to stabilize the image and make it insensitive to light.
Washing: The film must be washed to remove any residual
chemicals before drying.
Drying: Finally, the film is dried for use.
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.
The gold standard for the diagnosis of osteoporosis is
1. Dual energy X-ray absorptiometry
2. Single energy X-ray absorptiometry
3. Ultrasound
4. Quantitative computed tomography
Radiology
Answer: 1
The gold standard for the diagnosis of osteoporosis is Dual energy X-ray absorptiometry.
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.
Size of the focal spot influences radiographic
1. Definition
2. Density
3. Contrast
4. All of the above
Radiology
Answer: 1
The size of the focal spot influences radiographic definition.
Selection of kilovoltage for dental films depends on
1. Target-firm distance
2. Film-object distance
3. Density of tissues radiographed
4. All of the above
Radiology
Answer: 3
Selection of kilovoltage for dental films depends on the density of tissues radiographed.