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.Management Sciences
Category: Dentin
Which of the following dentinal layers is more mineralized______________?
A. Peritubular dentin
B. Inter tubular dentin
C. Dentinal tubules
D. Circum pulpal dentin
The type of tertiary dentin which contains cellular inclusions is found in_____________?
A. Sclerotic dentin
B. Mantle dentin
C. Predentin
D. Osteodentin
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
Fluid flow, in or out of the dentinal tubules is proportional to the tuble diameter by______________?
A. Third power of the diameter
B. Sixth power of the diameter
C. Square of the diameter
D. Fourth power of the diameter
Organic portion can be separated from the mineral by_____________?
A. Incineration/organic chelation
B. Decalcification
C. Devitrification
D. Combustion
All factors govering dentine permeability EXCEPT_______________?
A. Smear layer
B. Fluid convection
C. Length of dentinal tubules
D. Diffusion coefficient
Excess deposition of calcium in the dentinal tubules is referred to as______________?
A. Sclerotic dentin
B. Mantal dentin
C. Interglobular dentin
D. Intertubular dentin
All of the following is true about dentinal tubules except______________?
A. Inner pulpal layer contains more dentinal tubules than outer dentin layer
B. The diameter of dentin tubules ranges from 5 to 7μm
C. The diameter of dentinal tubule is more at pulpal layer than outer layer
D. The bonding is more on the inner layer of dentin compared to outer surface
Dentinogenesis by odontoblasts first begins at_____________?
A. Pulpal end
B. Cusp tip
C. Tooth bud stage
D. Cervical area
Which of the following is correct?
A. Reparative dentin is characterized by having fewer and more twisted tubules than normal dentin and may include odontoblasts
B. Dead tracts appear black in transmitted and white in reflected ligth
C. Sclerotic transparent dentin appears transparent or light in transmitted light and dark in reflected light
D. All of the above
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