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Competitive Dentin ( Oral Histology ) MCQs – Up To Date Medical MCQs

Competitive Dentin ( Oral Histology ) MCQs – Up To Date Medical MCQs

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Latest Medical MCQs

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Latest Dentin ( Oral Histology ) Mcqs

The most occurred mcqs of Dentin ( Oral Histology ) in past papers. Past papers of Dentin ( Oral Histology ) Mcqs. Past papers of Dentin ( Oral Histology ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Dentin ( Oral Histology ) Mcqs. The Important series of Dentin ( Oral Histology ) Mcqs are given below:

Which of the following is correct?

A. Sclerotic transparent dentin appears transparent or light in transmitted light and dark in reflected light
B. Dead tracts appear black in transmitted and white in reflected ligth
C. Reparative dentin is characterized by having fewer and more twisted tubules than normal dentin and may include odontoblasts
D. All of the above

Matrix vesicles_______________?

A. Are found in mantle dentin
B. Produce alkaline phosphatase
C. Contain collagen
D. Inhibit mineralization

One of the following statement is unique about circumpulpal dentine______________?

A. Collagen fibers are oriented perpendicular to DEJ
B. Requires matrix vesicle for mineralization
C. Contain phosphophoryn
D. Vonkorff fibers are present

The most accepted theory for dentin sensitivity is: or Which of the following is the most accepted theory of transmission of dental sensation_____________?

A. Direct neural stimulation
B. Transduction theory
C. Hydrodynamic theory
D. Hydrostatic theory

In adult teeth, the type of dentin present underlying dentin-enamel junction is_______________?

A. Interglobular dentin
B. Mantle dentin
C. Predentin
D. Tertiary dentin

Fluid flow, in or out of the dentinal tubules is proportional to the tuble diameter by______________?

A. Sixth power of the diameter
B. Third power of the diameter
C. Square of the diameter
D. Fourth power of the diameter

The formation of which of the following does not represent normal physiologiacl process of dentin formation_______________?

A. Secondary dentin and circumpulpal dentin
B. Primary and secondary dentin
C. Tetiary dentin and sclerotic dentin
D. All of the above

Regarding teeth which statement is wrong ?

A. Enamel has no cells
B. Enamel is harder than dentine
C. Ameloblast secrete enamel and dentine
D. Odontoblast produce dentin

Excess deposition of calcium in the dentinal tubules is referred to as______________?

A. Sclerotic dentin
B. Interglobular dentin
C. Mantal dentin
D. Intertubular dentin

1st formed dental tissue______________?

A. Cementum
B. Dentin
C. Enamel
D. Bone

The pain transmission through dentin is______________?

A. Fluid or hydrodynamic theory
B. Direct neural stimulation
C. Transduction theory
D. All of the above

The type of dentin that is formed prior to root completion______________?

A. Peritubular dentin
B. Inter tubular dentin
C. Circum pulpal dentin
D. Secondary dentin

Bone, AMJ And Maxillary Sinus MCQs

Organic portion can be separated from the mineral by_____________?

A. Incineration/organic chelation
B. Devitrification
C. Decalcification
D. Combustion

Shape of crown and the size of the roots is determined by______________?

A. Enamel
B. Dentin
C. Pulp
D. Cementum

Sclerotic dentin has following features_____________?

A. Insensitive
B. Caries susceptible
C. Hypersensitive
D. Resistant to caries

Inter globular dentin results due to_____________?

A. Failure of coalescence of calcospherities
B. Artifact in light microscopy
C. Fracture of the dentin
D. Disturbance in dentinal tubules

The main bulk of dentin is formed by______________?

A. Mantle dentin
B. Peritubular dentin
C. Inter tubular dentin
D. Predentin

Tome’s firbres are____________?

A. Type of sharpey’s fibres
B. Odontoblastic processes in dental tubules
C. With out but not with in the dentin
D. Originate from tome’s granular layer

Korffs fibres are seen in______________?

A. Mantle dentin
B. Reactionary dentin
C. Secondary dentin
D. Indeed dermal tubules

The type of tertiary dentin which contains cellular inclusions is found in_____________?

A. Mantle dentin
B. Sclerotic dentin
C. Predentin
D. Osteodentin

The organic lining of the calcified dentinal tubules is known as_______________?

A. Lamina lucida
B. Lamina propria
C. Lamina limitans
D. Lamina densa

The cells that form secondary dentin are_______________?

A. Fibroblasts
B. Cementoblasts
C. Odontoblasts
D. Osteoblasts

Which of the areas of the tooth is most sensitive during cavity preparation ?

A. Enamel (Posterior teeth)
B. Enamel (anterior teeth)
C. Dentin
D. Dentinoenamel junction

Transmission of stimulus across dentin is______________?

A. Correlated with the innervation density of the dentin
B. Direct activation of nerve endings
C. Stimulus induced fluid flow
D. There is no transmission of stimulus across dentin

During the formation of primary teeth_______________?

A. Enamel forms faster than dentin
B. Enamel forms more cervically than dentin
C. Dentin forms faster than enamel
D. Processes of their cells remain in content with each other

Compared to the inter tubular dentin, peritubular dentin is characterized by which of the following ?

A. Lasser content of inorganic salts
B. Greater stainability
C. greater content of inorganic salts
D. Greater content of large collagen fibres

All factors govering dentine permeability EXCEPT_______________?

A. Length of dentinal tubules
B. Fluid convection
C. Smear layer
D. Diffusion coefficient

The average diameter of coronal dentinal tubules near the pulp is____________?

A. 0.2-0.3 microns
B. 2-3 microns
C. 0.2-0.5 microns
D. 7 microns

All of the following is true about dentinal tubules except______________?

A. The diameter of dentinal tubule is more at pulpal layer than outer layer
B. The diameter of dentin tubules ranges from 5 to 7μm
C. Inner pulpal layer contains more dentinal tubules than outer dentin layer
D. The bonding is more on the inner layer of dentin compared to outer surface

S shape of dentinal tubules is due to______________?

A. Peritubular dentin
B. Incremental deposition
C. Crowding of odontoblasts
D. Due to excess amount of organic component

Dentin formed through out the life is______________?

A. Reparative dentin
B. Secondary dentin
C. Sclerotic dentin
D. All of the above

Enamel MCQs

Dentinal tubules are calcified in_______________?

A. Sclerotic dentin
B. Secondary dentin
C. Primary dentin
D. Interglobular dentin

Accentuated incremental lines in dentin due to disturbances in matrix and mineralization process is_____________?

A. Incremental lines of vonebner
B. Incremental lines of retzius
C. Contour lines of owen
D. None of the above

Formula of hydroxyapatite crystal is____________?

A. CaPo4 Ca(OH)2
B. 3Ca (Po4)2 Ca(OH)2
C. Ca3 (Po4)2 CaCo3
D. None of the above

Physically and chemically, the dentin is closely related to______________?

A. Bone
B. Enamel
C. Acellular cementum
D. None of the above

The microhardness of dentin is about____________?

A. 1/7 that of enamel
B. 1/2 that of enamel
C. 1/4 that of enamel
D. 1/5 that of enamel

Dentinogenesis by odontoblasts first begins at_____________?

A. Tooth bud stage
B. Cusp tip
C. Pulpal end
D. Cervical area

The zone of dentin most recently formed and uncalcified is known as____________?

A. Circumpulpal dentin
B. Mantle dentin
C. Predentin
D. Secondary dentin

The dentin receptors are unique because_____________?

A. They elicit pain to touch and pressure
B. They elicit pain to hot and cold
C. They elicit pain to chemicals
D. Elicit only pain as a response

Mirgration of odontoblasts into dentinal tubules occurs during ________________?

A. Cavity preparation
B. Water irrigation
C. Dehydration
D. None of the above

The dentin adjacent to the dentinoenamel junction is called the______________?

A. Mantle dentin
B. Predentin
C. Circumpulpal dentin
D. Secondary dentin

Which of the following dentinal layers is more mineralized______________?

A. Peritubular dentin
B. Dentinal tubules
C. Inter tubular dentin
D. Circum pulpal dentin

Dead tracts in ground section appears as_____________?

A. White in transmitted light and dark in reflected light
B. Coarse fibril bundles arranged at right angle to the dentinal surface
C. Black in transmitted light and white in reflected light
D. Dentinal tubules

Dentinal tubules are______________?

A. Straight
B. Concave
C. S0shaped
D. None of the above

Competitive Dentin ( Oral Histology ) MCQs – Up To Date Medical MCQs