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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

In a caries-free individual the saliva has_____________?

A low buffering capacity of acids
B Medium buffering capacity for acids
C High buffering capacity for acids
D Independent of buffering capacity for acids
Correct Answer: High buffering capacity for acids

The lateral spread of dental caries is facilitated mostly by the_______________?

A Enamel spindles
B Dentinoenamel junction
C Enamel lamellae
D Striae of Retzius
Correct Answer: Dentinoenamel junction

Caries, all are true except______________?

A Lactobacillus is main acusative organism in plaque
B Smooth surface caries occur due to streptococcus mutans
C Pit and Fissure caries can be prevented by using pit and tissue sealants
D Fluorides help in reducing caries incidence
Correct Answer: Lactobacillus is main acusative organism in plaque

Intitation of dental caries depends upon_______________?

A Formation of large amount of acid
B Availability of carbohydrate food
C Viscosity of saliva
D Localization of acid over tooth surface
Correct Answer: Localization of acid over tooth surface

Miller put forth the acidogenic theory of dental caries in the year______________?

A 1890
B 1920
C 1924
D 1980
Correct Answer: 1890

Turbid dentin in carious tooth is all EXCEPT_____________?

A Zone of bacterial invasion
B Zone which can not be remineralized
C Zone in which collagen is irreversibly denatured
D Zone that need not be removed before restoration
Correct Answer: Zone that need not be removed before restoration

Least cariogenic among these______________?

A Raw starch
B Cooked starch
C Sucrose
D Fructose
Correct Answer: Raw starch

In the earliest stages of carious lesion. There is loss of______________?

A Enamel cuticle
B Interprismatic substance
C Organic matrix
D Enamel lamellae
Correct Answer: Interprismatic substance

What is the PH at which initiation of caries begin ?

A 4.3-4.5
B 5.2-5.5
C 4.9-5.1
D 3.5-4.5
Correct Answer: 5.2-5.5

The dietary carbohydrate most likely involved in etiology of dental caries in man is____________?

A Glucose
B Sucrose
C Dextran
D Polysaccharide
Correct Answer: Sucrose
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