MDS PREP
The following kVp setting produce greatest contrast in radiograph image
1. 70 kVp
2. 80 kVp
3. 90 kVp
4. 100 kVp
Radiology
Answer: 1
The kVp setting that produces the greatest contrast in a radiograph image is 70 kVp.
The bisecting angle technique is used to take
1. Bitewing radiographs
2. Periapical radiographs
3. True occlusal radiographs of the mandible
4. None of the above
Radiology
Answer: 2
The bisecting angle technique is used to take periapical radiographs.
The view in which patient"s chin placed touching radiographic cassette
1. PA view of skull
2. Towne"s view
3. Submentovertex
4. Waters view
Radiology
Answer: 4
The view in which the patient's chin is placed touching the radiographic cassette is Waters view.
All of the following are radiolucent except
1. Ameloblastoma
2. Cementoblastoma
3. Keratocyst
4. Central giant cell granuloma
Radiology
Answer: 2
All of the following are radiolucent except cementoblastoma.
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
Hyperparathyroidism is a condition characterized by an
overproduction of parathyroid hormone (PTH), which leads to increased bone
resorption and changes in bone density. The radiographic features associated
with hyperparathyroidism include:
Loss of Lamina Dura: The lamina dura is the thin layer
of dense bone that lines the tooth socket (alveolus). In
hyperparathyroidism, the loss of lamina dura can be observed due to the
increased osteoclastic activity and bone resorption.
Ground Glass Appearance: This refers to a radiographic
appearance of bone that looks hazy or "ground glass" rather than having a
clear, well-defined structure. This appearance is due to the alteration in
bone density and the presence of fibrous tissue replacing normal bone.
Other Options:
Osteogenesis Imperfecta: This condition is characterized
by brittle bones due to a defect in collagen formation. Radiographically, it
may show thin cortices and osteopenia, but not typically a ground glass
appearance.
Osteopetrosis: This is a condition of excessive bone
density due to impaired osteoclast function. Radiographically, it shows
increased radiopacity (dense bones) rather than a ground glass appearance.
Osteitis Deformans (Paget's Disease): This condition is
characterized by disorganized bone remodeling. Radiographically, it can show
a "cotton wool" appearance and enlarged bones, but it does not typically
present with a loss of lamina dura or a ground glass appearance in the early
stages.
A consistant radiographic feature in Page"s disease is
1. Hypercementosis of tooth
2. Widened periodontal ligament
3. Loss of normal trabecular pattern of bone
4. Root resorption
Radiology
Answer: 1
A consistent radiographic feature in Paget's disease is hypercementosis of tooth.
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
Brown discolouration seen in old radiographic films is due to
1. Overdevelopment
2. Underdevelopment
3. Incomplete fixation
4. Exposure to light
Radiology
Answer: 3
Brown discoloration seen in old radiographic films is due to incomplete fixation.