MDS PREP
30 degrees occipitomental view is used best for viewing
1. Rim of the orbit
2. Root of the orbit
3. Floor of the orbit
4. Both A and C
Radiology
Answer: 4
The 30-degree occipitomental view is best for viewing both the rim and floor of the orbit.
Primary source of X-ray photons from an X-ray tube is
1. Stray radiation
2. Bremhaulstrong radiation
3. Characteristic radiation
4. All of the above
Radiology
Answer: 2
The primary source of X-ray photons from an X-ray tube is characteristic radiation.
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.
In the bisecting technique, the film is placed
1. Parallel to the tooth
2. As close as possible
3. Parallel to the bisector
4. Perpendicular to the bisector
Radiology
Answer: 2
In the bisecting technique, the film is placed as close as possible to the tooth.
Radiographic finding of generalised widening of periodontal ligament with "button hole" mouth is found in
1. Osteosarcoma
2. Scleroderma
3. Apical scar
4. Solar elastosis
Radiology
Answer: 2
Radiographic finding of generalized widening of the periodontal ligament with "button hole" mouth is found in scleroderma.
Best X-ray for mesiodens is
1. Occlusal
2. PA view
3. Panorex
4. Bitewing
Radiology
Answer: 1
The best X-ray for mesiodens is occlusal.
The cathode in Coolidge tube is made of..............whereas anode is made of...............
1) Copper; copper
2) Molybdenum; copper
3) Iron; lead
4) Aluminium; iron
Radiology
Answer: 2
Explanation: In a Coolidge tube, the cathode is typically made of molybdenum, which has a high melting point and is effective for electron emission. The anode is usually made of copper, which has excellent thermal conductivity, allowing it to dissipate heat generated during x-ray production effectively.
In pantamograph, if patient places chin in front of focal trough, the structures appear to be
1. Blurred and magnified
2. Blurred and diminished
3. Either magnified or diminished
4. Only blurred
Radiology
Answer: 2
In a pantomograph, if the patient places their chin in front of the focal trough, the structures appear to be blurred and diminished.