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

• 1. 1890
• 2. 1920
• 3. 1924
• 4. 1980

Question: Turbid dentin in carious tooth is all EXCEPT_____________?

• 1. Zone of bacterial invasion
• 2. Zone which can not be remineralized
• 3. Zone in which collagen is irreversibly denatured
• 4. Zone that need not be removed before restoration

Question: Least cariogenic among these______________?

• 1. Raw starch
• 2. Cooked starch
• 3. Sucrose
• 4. Fructose

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

• 1. Enamel cuticle
• 2. Interprismatic substance
• 3. Organic matrix
• 4. Enamel lamellae

Question: What is the PH at which initiation of caries begin ?

• 1. 4.3-4.5
• 2. 5.2-5.5
• 3. 4.9-5.1
• 4. 3.5-4.5

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

• 1. Glucose
• 2. Sucrose
• 3. Dextran
• 4. Polysaccharide

Question: The corrct order of microscopic zones of dentinal caries starting from the D.E junction is_______________?

• 1. Zone of sclerosis, decalcification zone, bacterial invasion
• 2. Bacterial invasion, decalcification zone, zone of sclerosis
• 3. Zone of sclerosis, backterial invasion, decalcification zone
• 4. Decalcification zone, zone of scierosis, backterial invasion

Question: Dental caries is associated with_____________?

• 1. Streptococcus agalactiae
• 2. Streptococcus mutans
• 3. Streptococcus bovis
• 4. Streptococcus anginosus

Question: Which of the following is cariogenic ?

• 1. Selenium
• 2. Vanadium
• 3. Strontium
• 4. Molybdenum

Question: Starch is considered to be less cariogenic than monosaccharides and disaccharides because it_______________?

• 1. Does not diffuse through plaque
• 2. Is rapidly hydrolysed in the mouth
• 3. Enhances remineralisation
• 4. Raises the PH in the oral cavity