Updated Medical MCQs – Latest Dental Caries ( Oral Pathology And Medicine ) MCQs
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Latest Medical MCQs
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Latest Dental Caries ( Oral Pathology And Medicine ) Mcqs
The most occurred mcqs of Dental Caries ( Oral Pathology And Medicine ) in past papers. Past papers of Dental Caries ( Oral Pathology And Medicine ) Mcqs. Past papers of Dental Caries ( Oral Pathology And Medicine ) 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 Dental Caries ( Oral Pathology And Medicine ) Mcqs. The Important series of Dental Caries ( Oral Pathology And Medicine ) Mcqs are given below:
Animals maintained in germ free environmental did not develop caries even when fed on a high carbohydrate diet is given by_____________?
D. Orland and Fizgerald
Initiation of caries by streptococcus mutans is by the production of______________?
A. soluble dextan and glucosyl transferase
B. Insoluble dextan and glucosyl transferase
C. Dextranase and soluble dextran
D. None of the above
A. Increase in calculus formation
B. Increase in plaque formation
C. Decrease in plaque formation
D. Causes precipitation of salivary proteins
Pioneer bacteria in dental caries are in_____________?
Chemico-parasitic theory of dental caries is proposed by______________?
C. G.V black
In a caries-free individual the saliva has_____________?
A. Medium buffering capacity for acids
B. low buffering capacity of acids
C. High buffering capacity for acids
D. Independent of buffering capacity for acids
The lateral spread of dental caries is facilitated mostly by the_______________?
A. Enamel lamellae
B. Dentinoenamel junction
C. Enamel spindles
D. Striae of Retzius
Caries, all are true except______________?
A. Lactobacillus is main acusative organism in plaque
B. Fluorides help in reducing caries incidence
C. Pit and Fissure caries can be prevented by using pit and tissue sealants
D. Smooth surface caries occur due to streptococcus mutans
Intitation of dental caries depends upon_______________?
A. Availability of carbohydrate food
B. Formation of large amount of acid
C. Viscosity of saliva
D. Localization of acid over tooth surface
Miller put forth the acidogenic theory of dental caries in the year______________?
Turbid dentin in carious tooth is all EXCEPT_____________?
A. Zone which can not be remineralized
B. Zone of bacterial invasion
C. Zone in which collagen is irreversibly denatured
D. Zone that need not be removed before restoration
Least cariogenic among these______________?
A. Raw starch
C. Cooked starch
In the earliest stages of carious lesion. There is loss of______________?
A. Organic matrix
B. Interprismatic substance
C. Enamel cuticle
D. Enamel lamellae
What is the PH at which initiation of caries begin ?
The dietary carbohydrate most likely involved in etiology of dental caries in man is____________?
The corrct order of microscopic zones of dentinal caries starting from the D.E junction is_______________?
A. Zone of sclerosis, backterial invasion, decalcification zone
B. Bacterial invasion, decalcification zone, zone of sclerosis
C. Zone of sclerosis, decalcification zone, bacterial invasion
D. Decalcification zone, zone of scierosis, backterial invasion
Dental caries is associated with_____________?
A. Streptococcus bovis
B. Streptococcus mutans
C. Streptococcus agalactiae
D. Streptococcus anginosus
Which of the following is cariogenic ?
Starch is considered to be less cariogenic than monosaccharides and disaccharides because it_______________?
A. Does not diffuse through plaque
B. Enhances remineralisation
C. Is rapidly hydrolysed in the mouth
D. Raises the PH in the oral cavity
Organism involved in smooth surface caries is____________?
1 Streptococcus mutans
2 Actinomyces viscosus
A. only 1
B. 1 and 3
C. only 2
D. All of the above
The attachment of the Actinomyces species to the tooth surface is facilitated by____________?
Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________?
A. Frequency of sugar intake
B. Physical form of sugar
C. Ph of Plaque
D. Quantity of sugar intake
Cavity formation in a tooth, due to dental caries is due to______________?
A. Destructive potential of lactobacillus acidophilus
B. Destructive potential of streptococcus mutans
C. Lateral spread of caries along DE junction and weakening of the outer covering enamel
D. Mastectomy force and unrelated to the extent of carious process
The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?
A. Significant decrease in number of oral bacteria
B. Shift towards more acidogenic microflora
C. Significant increase in number of oral bacteria
D. Shift towards more aerobic microflora
Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?
Early invading bacteria in carious lesions are called___________?
A. Advancing bacteria
B. Pioneer bacteria
D. Anaerobic bacteria
The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?
A. Negligence in visiting the dentist
B. Frequency of sucrose intake
C. Rapid growth
D. Carelessness in oral hygiene habits
The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?
For a bacterium to be seriously considered in the etiology of dental caries, it must______________?
A. Exist regularly in the dental plaque
B. Be lethal for gnotobiotic animals
C. Produce extracellular amylopectins
D. Produce intracellular dextrans
Streptococcus mutans is considered to be principle etiologic agent of caries because it produces organic acids and it ________________?
A. Forms a gelatinous matrix
B. Derives energy from enamel constituents
C. Metabolizes substrate from saliva
D. Lives symbiolically with lactobacillus
Which tooth in the permanent dentition is the most susceptible to dental caries ?
A. Maxillary 2nd molar
B. Maxillary 1st premolar
C. Mandibular 1st molar
D. Mandibular 2nd molar
Smooth surface caries is characterized by spread of caries in enamel and dentin as cones. These alignment in enamel and dentin is____________?
A. Apex to apex
B. Apex to base
C. Base to base
D. None of the above
Oral foci of miller’s are seen in_______________?
A. Dental caries
B. Herpes simplex
C. Lichen planus
Bacteria responsible for initiation of caries is _________________?
B. Strep. mutans
D. Strep. viridans
S. mutans is involved in dental caries initiation Other bacteria also involved is______________?
A. S. Sarcinus
B. S. salivarius
C. S. sanguis
D. S. macae
Widely accepted theory of dental caries_____________?
A. Proteolytic chelation theory
B. Proteolytic theory
C. Acidogenic theory
D. Autoimmune theory
The number of dentinal zones in dentinal caries is_____________?
In a patient with reduced salivary flow the carious incidence is_______________?
A. More than the patient with normal salivary flow
C. less than the patient with normal salivary flow
D. None of the above
The extra – cellular polysaccharide sythesized by cariogenic streptococci in the presence of excess sucrose are best described as_______________?
A. Glycogen – like glucan
B. Dextran-like glucan
Lactobacilli are numerous in caious lesions because they______________?
A. Can attack to smooth enamel surfaces
B. Can produce insoluble extracellular polysaccharides
C. Are the main causative agent
D. Are secondary invaders