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Medical Science Mcqs 5254 MCQs [All-Courses]

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Medical Science is the study of human health, diseases, prevention, and treatment, focusing on diagnosis, patient care, and medical research to improve healthcare outcomes.

All Topics  5254

Butt joint in cementoenamel junctions seen is _________% of cases?
A 10%
B 30%
C 60%
D 90%
Correct Answer: 30%
Cementum_____________?
A Is derived from the sheath of hertwig
B Is acellular in the apical third of the tooth
C Often overlaps the enamel
D Does not contain collagen fibres
Correct Answer: Often overlaps the enamel
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
Correct Answer: All of the above
Matrix vesicles_______________?
A Are found in mantle dentin
B Contain collagen
C Produce alkaline phosphatase
D Inhibit mineralization
Correct Answer: Are found in mantle dentin
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
Correct Answer: Contain phosphophoryn
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
Correct Answer: Hydrodynamic theory
In adult teeth, the type of dentin present underlying dentin-enamel junction is_______________?
A Predentin
B Mantle dentin
C Interglobular dentin
D Tertiary dentin
Correct Answer: Mantle dentin
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
Correct Answer: Fourth power of the diameter
The formation of which of the following does not represent normal physiologiacl process of dentin formation_______________?
A Primary and secondary dentin
B Secondary dentin and circumpulpal dentin
C Tetiary dentin and sclerotic dentin
D All of the above
Correct Answer: Tetiary dentin and sclerotic dentin
Regarding teeth which statement is wrong ?
A Enamel is harder than dentine
B Enamel has no cells
C Ameloblast secrete enamel and dentine
D Odontoblast produce dentin
Correct Answer: Ameloblast secrete enamel and dentine
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