(A) Does not diffuse through plaque
(B) Enhances remineralisation
(C) Is rapidly hydrolysed in the mouth
(D) Raises the PH in the oral cavity

(A) Selenium
(B) Strontium
(C) Vanadium
(D) Molybdenum

(A) Streptococcus bovis
(B) Streptococcus mutans
(C) Streptococcus agalactiae
(D) Streptococcus anginosus

(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

(A) Dextran
(B) Sucrose
(C) Glucose
(D) Polysaccharide

(A) 4.9-5.1
(B) 5.2-5.5
(C) 4.3-4.5
(D) 3.5-4.5

(A) Organic matrix
(B) Interprismatic substance
(C) Enamel cuticle
(D) Enamel lamellae

(A) Raw starch
(B) Sucrose
(C) Cooked starch
(D) Fructose

(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

(A) 1890
(B) 1924
(C) 1920
(D) 1980