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.Management Sciences
Category: Dentin
S shape of dentinal tubules is due to______________?
A. Incremental deposition
B. Peritubular dentin
C. Crowding of odontoblasts
D. Due to excess amount of organic component
Accentuated incremental lines in dentin due to disturbances in matrix and mineralization process is_____________?
A. Incremental lines of retzius
B. Incremental lines of vonebner
C. Contour lines of owen
D. None of the above
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
In adult teeth, the type of dentin present underlying dentin-enamel junction is_______________?
A. Predentin
B. Mantle dentin
C. Interglobular dentin
D. Tertiary dentin
Tome’s firbres are____________?
A. With out but not with in the dentin
B. Odontoblastic processes in dental tubules
C. Type of sharpey’s fibres
D. Originate from tome’s granular layer
Transmission of stimulus across dentin is______________?
A. Direct activation of nerve endings
B. Correlated with the innervation density of the dentin
C. Stimulus induced fluid flow
D. There is no transmission of stimulus across dentin
Dentinal tubules are calcified in_______________?
A. Sclerotic dentin
B. Primary dentin
C. Secondary dentin
D. Interglobular dentin
Physically and chemically, the dentin is closely related to______________?
A. Bone
B. Acellular cementum
C. Enamel
D. None of the above
One of the following statement is unique about circumpulpal dentine______________?
A. Collagen fibers are oriented perpendicular to DEJ
B. Vonkorff fibers are present
C. Contain phosphophoryn
D. Requires matrix vesicle for mineralization
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
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