311. Approximately how many enamel rods will be present in a maxillary molar ?
A. 5 million
B. 7 million
C. 9 million
D. 12 million
✅ The correct answer is option D. 12 million.
Oral Histology
312. The development of pulp begins__________?
A. 6th week of IU
B. 8th week of IU
C. 10th week of IU
D. 18th week of IU
✅ The correct answer is option B. 8th week of IU.
313. Which of the following is true of cellular cementum ?
A. Forms during root formation
B. Forms after the eruption of the tooth
C. Seen at the coronal portion of the tooth
D. Formation is a slow process
✅ The correct answer is option B. Forms after the eruption of the tooth.
314. Which of the areas of the tooth is most sensitive during cavity preparation ?
A. Enamel (anterior teeth)
B. Enamel (Posterior teeth)
C. Dentin
D. Dentinoenamel junction
✅ The correct answer is option D. Dentinoenamel junction.
315. The disturbances occurred during Calcification stage of tooth development is seen in_____________?
A. Peg laterals
B. Microdontia
C. Supernumerary tooth
D. Interglobular dentin
✅ The correct answer is option D. Interglobular dentin.
316. The most accepted theory for dentin sensitivity is: or Which of the following is the most accepted theory of transmission of dental sensation_____________?
A. Transduction theory
B. Direct neural stimulation
C. Hydrodynamic theory
D. Hydrostatic theory
✅ The correct answer is option C. Hydrodynamic theory.
317. The pain transmission through dentin is______________?
A. Direct neural stimulation
B. Fluid or hydrodynamic theory
C. Transduction theory
D. All of the above
✅ The correct answer is option D. All of the above.
318. Outer and inner enamel epithelium first seen in____________?
A. Bud stage
B. Advanced bell stage
C. Cap stage
D. Bell stage
✅ The correct answer is option C. Cap stage.
319. The average life time of primary pulp in oral cavity is__________?
A. 8.3 years
B. 2 years
C. 7 years
D. 3 years
✅ The correct answer is option A. 8.3 years.
320. In mineralization which one of the following is known as Epitaxy ?
A. Booster Mechanism
B. Seeding theory
C. Alkaline Phosphatase theory
D. Cartier/s Adenosine Triphosphate theory
✅ The correct answer is option B. Seeding theory.