MDS PREP
Reduced salivary flow following irradiation is dose dependent. At what dose does the flow reach essentially zero?
1. 4000 rads
2. 5000 rads
3. 6000 rads
4. 7000 rads
Oral Pathology
Answer: 3
Reduced salivary flow reaches essentially zero at a dose of 6000 rads.
The X-ray collimators commonly used in dentistry include the following except
1. Diaphragm collimator
2. Tubular collimator
3. Rectangular collimator
4. Square collimator
Oral Pathology
Answer: 4
Square collimators are not commonly used in dentistry.
Abscess formation is particularly characteristic of infections with which of the following microorganisms
1) Viruses
2) Rickettsiae
3) Streptococci
4) Staphylococci
Oral Pathology
Answer: 4
Staphylococci are known for their ability to cause abscess formation due to their virulence factors.
Mean exposure at skin from an intraoral periapical radiographs
1. 300 mR
2. 0.03 mR
3. 47 mR
4. Both A and B
Oral Pathology
Answer: 4
Mean exposure at the skin from intraoral periapical radiographs is 0.03 mR.
Which of the following is not characteristic of congenital syphilis?
1. Ghon complex
2. Interstitial keratitis
3. Mulberry molars
4. Notched incisors
Oral Pathology
Answer: 1
Ghon complex is associated with primary tuberculosis, not congenital syphilis. The other options (interstitial keratitis, mulberry molars, and notched incisors) are indeed characteristics of congenital syphilis.
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.
Which of the following may be a feature of acromegaly?
1. Large tongue
2. Micrognathia
3. Hypoglycaemia
4. Crowded teeth
Oral Pathology
Answer: 1
A large tongue is a common feature of acromegaly.
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.