MDS PREP
To localize a supernumerary or an impacted tooth and determine its exact relationship to the other teeth, which of the following radiographs would be most effective?
1. A periapical and an occlusal view
2. An occlusal view using a high angle
3. A panoramic radiograph
4. Two or more periapical views at different angles and an occlusal view
Radiology
Answer: 4
To localize a supernumerary or an impacted tooth and determine its exact relationship to the other teeth, the most effective radiographs would be two or more periapical views at different angles and an occlusal view.
Intensifying screen is used in extraoral radiograph to
1. Decrease patient radiation
2. Increase contrast
3. Decrease contrast
4. Collimation
Radiology
Answer: 1
Intensifying screen is used in extraoral radiographs to decrease patient radiation.
Which of the following imaging techniques cannot differentiate benign and malignant tumours of salivary gland
1. Scintigraphy
2. CT scan
3. MRI
4. Sialography
Radiology
Answer: 1
Scintigraphy cannot differentiate benign and malignant tumours of the salivary gland.
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.
To discriminate objects with small density difference like CSF and blood the radiographic technique used is
1. CT scan
2. Pantamograph
3. Lateral cephalogram
4. None of the above
Radiology
Answer: 1
To discriminate objects with small density differences like CSF and blood, the radiographic technique used is CT scan.
Green film after processing is due to
1. Film placed in fixer solution first
2. High temperature difference of solution
3. Film emulsion not in contact with processing solution
4. Presence of rare earth elements in film
Green film after processing is due to the film emulsion not being in contact with the processing solution.
Yellowish-brown staining of the IOPA dental X-ray film is due to
1. Immersion in fixer without washing
2. Increased temperature of developer
3. Increased exposure time
4. Drying away of the developer solution
Yellowish-brown staining of the IOPA dental X-ray film is due to immersion in fixer without washing.
Loss of lamina dura and ground glass appearance of bone is an early radiographic feature of
1. Osteogenesis imperfecta
2. Hyperparathyroidism
3. Osteopetrosis
4. Osteitis deformans
Radiology
Answer: 2
Loss of lamina dura and ground glass appearance of bone is an early radiographic feature of hyperparathyroidism.