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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

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
Correct Answer: The diameter of dentin tubules ranges from 5 to 7μm
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
Correct Answer: Crowding of odontoblasts
Dentin formed through out the life is______________?
A Sclerotic dentin
B Secondary dentin
C Reparative dentin
D All of the above
Correct Answer: Secondary dentin
Dentinal tubules are calcified in_______________?
A Sclerotic dentin
B Primary dentin
C Secondary dentin
D Interglobular dentin
Correct Answer: Sclerotic dentin
Which of the following is correct?
A Each rod is formed by 4 ameloblasts
B Each ameloblast contributes to 4 different rods
C Head of the rod is formed by one ameloblasts, and tail is formed by three other ameloblasts
D All of the above
Correct Answer: All of the above
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
Correct Answer: Contour lines of owen
Formula of hydroxyapatite crystal is____________?
A Ca3 (Po4)2 CaCo3
B 3Ca (Po4)2 Ca(OH)2
C CaPo4 Ca(OH)2
D None of the above
Correct Answer: 3Ca (Po4)2 Ca(OH)2
Physically and chemically, the dentin is closely related to______________?
A Bone
B Acellular cementum
C Enamel
D None of the above
Correct Answer: Bone
Which of the following statement is correct?
A Enamel cannot form in absence of dentin
B The formation of enamel and dentin are independent of each other
C Enamel formation can occur in absence of dentin
D None of the above
Correct Answer: Enamel cannot form in absence of dentin
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
Correct Answer: 1/4 that of enamel
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