382.Which of the following partially or completely disappears visually when the enamel is hydrated

a.Incipient caries
b.Hypocalcified enamel
c.Tetracycline stains
d.Flouride stains
Ans-a.Incipient caries

381.Resistance to torquing is produced by acheiving

a.Buccal hook

b.Truss effect

c.Lingual hook

d.Proximal hook

Ans-c.Lingul hook

380.Twin wire appliance is a

a.Fixed appliance
b.Removable appliance
c.Functional appliance
d.Sectional fixed appliance


Ans-a.Fixed appliance 
Ref-Profitt 4th ed pg 371