Physically and chemically, the dentin is closely related to______________?
A. Bone
B. Acellular cementum
C. Enamel
D. None of the above
Oral Histology
The microhardness of dentin is about____________?
The microhardness of dentin is about____________?
A. 1/2 that of enamel
B. 1/7 that of enamel
C. 1/4 that of enamel
D. 1/5 that of enamel
Dentinogenesis by odontoblasts first begins at_____________?
Dentinogenesis by odontoblasts first begins at_____________?
A. Pulpal end
B. Cusp tip
C. Tooth bud stage
D. Cervical area
The zone of dentin most recently formed and uncalcified is known as____________?
The zone of dentin most recently formed and uncalcified is known as____________?
A. Mantle dentin
B. Circumpulpal dentin
C. Predentin
D. Secondary dentin
The dentin receptors are unique because_____________?
The dentin receptors are unique because_____________?
A. They elicit pain to hot and cold
B. They elicit pain to touch and pressure
C. They elicit pain to chemicals
D. Elicit only pain as a response
Mirgration of odontoblasts into dentinal tubules occurs during ________________?
Mirgration of odontoblasts into dentinal tubules occurs during ________________?
A. Cavity preparation
B. Dehydration
C. Water irrigation
D. None of the above
The dentin adjacent to the dentinoenamel junction is called the______________?
The dentin adjacent to the dentinoenamel junction is called the______________?
A. Mantle dentin
B. Circumpulpal dentin
C. Predentin
D. Secondary dentin
Which of the following dentinal layers is more mineralized______________?
Which of the following dentinal layers is more mineralized______________?
A. Peritubular dentin
B. Inter tubular dentin
C. Dentinal tubules
D. Circum pulpal dentin
Dead tracts in ground section appears as_____________?
Dead tracts in ground section appears as_____________?
A. Dentinal tubules
B. Coarse fibril bundles arranged at right angle to the dentinal surface
C. Black in transmitted light and white in reflected light
D. White in transmitted light and dark in reflected light
Dentinal tubules are______________?
Dentinal tubules are______________?
A. Concave
B. Straight
C. S0shaped
D. None of the above