MDS PREP
The minimum distance and angle between the X-ray source and operator should be at least
1. 6 feet, 45 degree
2. 6 feet, 135 degree
3. 9 feet, 90 degree
4. 9 feet, 120 degree
Oral Pathology
Answer: 2
The minimum distance should be 6 feet at a 135-degree angle for safety.
The Maximum penetration among the following is seen with which ray
1. Alpha
2. Beta
3. Gamma
4. Electron beam
Oral Pathology
Answer: 3
Gamma rays have the maximum penetration among the listed types of radiation.
The wavelength of X-ray photon depends upon
1. Milli amperage
2. Kilo voltage
3. Distance between source and object
4. Quantity of electrons in the cathod stream
Oral Pathology
Answer: 2
The wavelength of X-ray photons depends on the kilo voltage applied.
Bismuth intoxication is manifested as
1. Pigmentation in areas of inflammation
2. Burtonian line
3. Gingiva
4. Blackish line in mucosa
Oral Pathology
Answer: 1
Bismuth intoxication is manifested as pigmentation in areas of inflammation.
When a shielded open cone is used the gonadal dose to a patient is mainly from
1. Leakage from tube
2. Primary X-ray tube
3. Scatters from patient"s face
4. All of the above
Oral Pathology
Answer: 3
The gonadal dose mainly comes from leakage from the tube when using a shielded open cone.
Compound odontoma shows on a radiograph as
1) Supernumerary teeth
2) Radiolucent and radiopaque areas
3) Masses of calcified areas
4) Distinguishable tooth-like structures
Oral Pathology
Answer: 4
A compound odontoma is a benign odontogenic tumor consisting of enamel, dentin, cementum, and pulp arranged in recognizable tooth-like structures. Radiographically, it appears as multiple small, tooth-like radiopaque structures, unlike complex odontomas, which show as masses of calcified material.
The principle hazard to operator and patient is produced by what type of radiation
1. Gamma
2. Primary
3. Secondary
4. None of the above
Oral Pathology
Answer: 3
The principle hazard to the operator and patient is produced by secondary radiation.
Which of the following diseases are characterized by absence of lamina dura, hypocalcified dentine, elongated pulp horns, periapical infection with multiple periapical fistulas
1. Paget"s disease
2. Primary hyperthyroidism
3. Vit D resistant rickets
4. Hypophosphatasia
Oral Pathology
Answer: 3
Vitamin D resistant rickets is characterized by absence of lamina dura and hypocalcified dentine.