377.dentinogenesis imperfect occurs in which stage of tooth development

a.initiation

b.histodifferentiation

c.morphodifferentiation

d .maturation

Ans-b.histodifferentiation 

Ref mc donald 8th ed pg 53

376.The difference in color of subgingival and supragingival calculus is due to

a.ph of saliva
b.death of leucocytes
c.hemolysis of erythocytes
d.none


Ans-c.hemolysis of erythrocytes

375.The protiens found in the attachement plaque

a.albumin and globulin
b. amelogenin and enamelin
c.sialoprotien
d.desmoplakin and plakoglobin


Ans-d.desmoplakin and plakioglobin