MDS PREP
Which of the following provides superior definition of soft tissues, bony details and physiologic information about the TMJ joint
1. MRI
2. Pantomograph
3. Arthrography
4. CT scan
Radiology
Answer: 3
The imaging technique that provides superior definition of soft tissues, bony details, and physiologic information about the TMJ joint is arthrography.
Which of the following is useful for studying the movements of the tongue
1. Angiography
2. Arthroscope
3. Fluroscope
4. Sonograpgy
Radiology
Answer: 3
Which of the following is useful for studying the movements of the tongue: Fluoroscopy.
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.
Which radiographic projection is most useful in examining stone of a submandibular duct
1. Cross-sectional occlusal
2. OPG
3. Lateral oblique
4. PA view of mandible
Radiology
Answer: 1
The radiographic projection most useful in examining stone of a submandibular duct is cross-sectional occlusal.
A developer at high temperature will cause
1. Clear white spots on the film
2. Yellow stains
3. Very dark image
4. Very light image
Radiology
Answer: 3
A developer at high temperature will cause a very dark image.
The best image obtained if duplicating film is exposed tp
1. X-rays
2. UV rays
3. Visible light
4. Infrared light
Radiology
Answer: 2
The best image obtained if duplicating film is exposed to UV rays.
Zygoma fractures can be best viewed by
1. Occipitomental view
2. Lateral oblique
3. Towne"s view
4. True lateral
Radiology
Answer: 1
Zygoma fractures can be best viewed by occipitomental view.
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.