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.
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.
Fogging on the radiographs is the result of
1. Increase in humidity
2. Scattered radiation
3. Overdevelopment
4. All of the above
Radiology
Answer: 4
Fogging on the radiographs is the result of all of the above: increase in humidity, scattered radiation, overdevelopment.
The radiographic view that has to be avoided in patients with cervical spondylitis
1. PA view
2. Submentovertex
3. Towne"s view
4. Occipito mentalview
Radiology
Answer: 2
The radiographic view that has to be avoided in patients with cervical spondylitis is Submentovertex.
Location and radiographic density make a talon cusp appear similar to
1. Delacerations
2. Concrescence
3. A supernumerary tooth
4. Dens in dente
Radiology
Answer: 3
Talon cusp (TC) and dens in dente (DiD) are both developmental anomalies of
the teeth, but they differ in their formation and appearance. A talon cusp
arises from the palatal or lingual aspect of an incisor tooth, typically in the
maxillary central or lateral incisors. It is composed of enamel and dentin, and
its shape can vary from a mild bulge to a fully formed cusp that extends to the
incisal edge of the tooth. It can be mistaken for a supernumerary tooth on
radiographs due to its pointed projection and density.
In contrast, dens in dente is a condition where a tooth has an invagination in
its crown that contains a smaller tooth-like structure, known as the "dental
lamina," which is enclosed within it. This invagination is usually filled with
pulp tissue and dentin, and the internal structure resembles a tooth within a
tooth. The smaller structure within the affected tooth can mimic a supernumerary
tooth on radiographs, but it is not a separate tooth.
Ghost like shadow seen in
1. MRI
2. OPG
3. CT
4. Cephalogram
A ghost-like shadow is seen in an OPG.
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.
Image of a hair appears on a radiograph which was exposed in a cassette. The hair would have been located in all of the following to produce this image except in
1. On the front of the cassette
2. Between film and front intensifying screen
3. Between film and back intensifying screen
4. On the film during development
Radiology
Answer: 4
Image of a hair appears on a radiograph which was exposed in a cassette. The hair would have been located in all of the following to produce this image except on the film during development.