MDS PREP
Zygomatic arch fractures are best viewed in
1. Occipitomental view
2. Lateral oblique
3. Submentovertex
4. Leteral view
Radiology
Answer: 3
Zygomatic arch fractures are best viewed in Submentovertex.
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.
Lamina dura is
1. Radiographic appearance of alveolar bone proper
2. Radiographic appearance of cortical bone
3. Radiographic appearance of cancellous bone
4. All of the above
Radiology
Answer: 1
Lamina dura is the radiographic appearance of alveolar bone proper.
Waters projection is useful for eveluating
1. Frontal and ethmoidal sinuses
2. Maxillary sinus
3. Zygomaticofrontal suture and nasal cavity
4. All of the above
Radiology
Answer: 4
Waters projection is useful for evaluating all of the above: frontal and ethmoidal sinuses, maxillary sinus, zygomaticofrontal suture and nasal cavity.
The scientist who discovered that caries was the most common cause of extraction of teeth was
1. Allen
2. Smith
3. Hotz
4. Rush
Radiology
Answer: 1
The scientist who discovered that caries was the most common cause of extraction of teeth was Allen.
Mottling is seen due to
1. Fast film
2. Low speed film
3. Motion
4. Scattered radiation
Radiology
Answer: 4
Mottling is seen due to scattered radiation.
Minimum percentage of cortical bone loss that should occur to be demonstrable in radiographic
1) 6.6 %
2) 13 %
3) 20 %
4) 30-40 %
Radiology
Answer: 2
Radiographic evidence of cortical bone loss typically becomes apparent when at least 13% of the bone height has been lost. This is because the density of the bone and the surrounding structures needs to be significantly altered to be detectable on an X-ray film.
The radiograph showing one of the best view of a fracture of
1. The orbital rim is the 30 degree occipitomental view
2. The orbital floor is the 10 degree occipitomental view
3. The orbital medial wall is the lateral skull view
4. The orbital roof is the lateral skull view
The radiograph showing the best view of a fracture of the orbital floor is the 10-degree occipitomental view.