MDS PREP
Loss of lamina dura and ground glass appearance indicates
1. Paget"s disease
2. Fibrous dysplasia
3. Caffey"s disease
4. Osteomalacia
Loss of lamina dura and ground glass appearance indicates fibrous dysplasia.
The vertical angle for making bitewing radiographs is
1. Zero degree
2. Adjusted for the curve of Space
3. Approximately Five degree upward
4. Approximately Five degree downward
Radiology
Answer: 4
The vertical angle for making bitewing radiographs is approximately five degrees downward.
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
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.
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.
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.
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.
Which of the following is a possible cause for a low density radiograph
(light film?)
1. Cold developer
2. over exposure
3. Improper safety light
4. Excessive developing time
Radiology Answer: 1
Overexposure typically results in a darker film, not a lighter one. An improper safety light or excessive developing time would not directly cause a low density radiograph. It is essential to maintain the correct temperature and time in the developing process to achieve a diagnostic image quality. A cold developer will not fully develop the film, leading to a lighter, less detailed image.