1) True ankyloglossia occurs as a result of________________? a. Union between tongue and floor of mouth b. Absence of lingual frenum c. Lingual frenum attached to the tip of tongue d. Short lingual frenum
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2) Teeth that erupt with in 30 days of birth are called________________? a. Natal teeth b. Neonatal teeth c. Primary teeth d. Prenatal teeth
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3) The syndrom which consists of cleft palate micrognathia and glossoptosis is known as_____________? a. Marfan’s syndrome b. Crouzon’s syndrome c. Paget’s disease d. PierreRobin syndrome
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4) Facial edema, cheilitis granulomatosa and a fissured tongue characterize which of the following syndromes ? a. Frey b. Melkerson-Rosenthal c. Teacher Collins d. None of the above
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5) Globulamaxillary cyst is______________? a. Soft tissue cyst present often between maxillary Lateral incisor and cuspid teeth b. Often present between incisor and cuspid teeth but is a bone cyst c. A cyst present between the midline of the palate d. A cyst present in the incisive canal
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6) Peg-shaped incisors which taper towards the incisal edge are typically seen in all of the following conditions EXCEPT______________? a. Congenital syphilis b. Rickets c. Anhidrotic ectodermal dysplasia d. Supernumerary teeth
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7) A union of the roots of adjacent teeth through the cementum is referred to as_____________? a. Concrescence b. Fusion c. Gemination d. None of the above
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8) Animals maintained in germ free environmental did not develop caries even when fed on a high carbohydrate diet is given by_____________? a. Gottlieb b. Miller c. Synder d. Orland and Fizgerald
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9) Initiation of caries by streptococcus mutans is by the production of______________? a. Dextranase and soluble dextran b. Insoluble dextan and glucosyl transferase c. soluble dextan and glucosyl transferase d. None of the above
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10) Ammonia causes______________? a. Increase in plaque formation b. Increase in calculus formation c. Decrease in plaque formation d. Causes precipitation of salivary proteins
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11) Pioneer bacteria in dental caries are in_____________? a. Enamel b. Dentin c. Pulp d. Cementum
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12) Chemico-parasitic theory of dental caries is proposed by______________? a. Miller b. G.V black c. Gottlieb d. Schwartz
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13) 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
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14) The lateral spread of dental caries is facilitated mostly by the_______________? a. Enamel spindles b. Dentinoenamel junction c. Enamel lamellae d. Striae of Retzius
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15) 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
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16) 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
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17) Miller put forth the acidogenic theory of dental caries in the year______________? a. 1890 b. 1920 c. 1924 d. 1980
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18) 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
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19) Least cariogenic among these______________? a. Raw starch b. Cooked starch c. Sucrose d. Fructose
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20) In the earliest stages of carious lesion. There is loss of______________? a. Enamel cuticle b. Interprismatic substance c. Organic matrix d. Enamel lamellae
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21) 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
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22) The dietary carbohydrate most likely involved in etiology of dental caries in man is____________? a. Glucose b. Sucrose c. Dextran d. Polysaccharide
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23) The corrct order of microscopic zones of dentinal caries starting from the D.E junction is_______________? a. Zone of sclerosis, decalcification zone, bacterial invasion b. Bacterial invasion, decalcification zone, zone of sclerosis c. Zone of sclerosis, backterial invasion, decalcification zone d. Decalcification zone, zone of scierosis, backterial invasion
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24) Dental caries is associated with_____________? a. Streptococcus agalactiae b. Streptococcus mutans c. Streptococcus bovis d. Streptococcus anginosus
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25) Which of the following is cariogenic ? a. Selenium b. Vanadium c. Strontium d. Molybdenum
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26) Starch is considered to be less cariogenic than monosaccharides and disaccharides because it_______________? a. Does not diffuse through plaque b. Is rapidly hydrolysed in the mouth c. Enhances remineralisation d. Raises the PH in the oral cavity
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27) Organism involved in smooth surface caries is____________?
1 Streptococcus mutans 2 Actinomyces viscosus 3 Lactobacillus 4 Campylobacter a. only 1 b. only 2 c. 1 and 3 d. All of the above
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28) The attachment of the Actinomyces species to the tooth surface is facilitated by____________? a. Fimbriae b. Cilia c. Flagella d. Pseudopodia
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29) Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________? a. Physical form of sugar b. Frequency of sugar intake c. Ph of Plaque d. Quantity of sugar intake
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30) Cavity formation in a tooth, due to dental caries is due to______________? a. Destructive potential of streptococcus mutans b. Destructive potential of lactobacillus acidophilus 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
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31) The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________? a. Significant increase in number of oral bacteria b. Shift towards more acidogenic microflora c. Significant decrease in number of oral bacteria d. Shift towards more aerobic microflora
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32) Which of the following organisms is found in deep carious lesions rather than in incipient lesions ? a. Streptococci b. Lactobacilli c. Veillonella d. Bateroides
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33) Early invading bacteria in carious lesions are called___________? a. Microcosm b. Pioneer bacteria c. Advancing bacteria d. Anaerobic bacteria
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34) The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________? a. Rapid growth b. Frequency of sucrose intake c. Negligence in visiting the dentist d. Carelessness in oral hygiene habits
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35) The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________? a. The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________? b. Fructose c. Sucrose d. Lactose
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36) For a bacterium to be seriously considered in the etiology of dental caries, it must______________? a. Exist regularly in the dental plaque b. Produce extracellular amylopectins c. Be lethal for gnotobiotic animals d. Produce intracellular dextrans
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37) Streptococcus mutans is considered to be principle etiologic agent of caries because it produces organic acids and it ________________? a. Forms a gelatinous matrix b. Metabolizes substrate from saliva c. Derives energy from enamel constituents d. Lives symbiolically with lactobacillus
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38) Which tooth in the permanent dentition is the most susceptible to dental caries ? a. Maxillary 1st premolar b. Maxillary 2nd molar c. Mandibular 1st molar d. Mandibular 2nd molar
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39) Smooth surface caries is characterized by spread of caries in enamel and dentin as cones. These alignment in enamel and dentin is____________? a. Base to base b. Apex to base c. Apex to apex d. None of the above
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40) Oral foci of miller’s are seen in_______________? a. Dental caries b. Lichen planus c. Herpes simplex d. Syphilis
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