1181. The axial wall in a class v cavity mesiodistally is :

A. Convex *
B. Concave
C. Flat
D. Deeper mesially

1182. Gingivally the depth of a class v cavity is :

A. 0.5-1 mm
B. 0.75-1 mm *
C. 1-1.25 mm
D. 2-3 mm

1183. The retentive grooves are prepared with :

A. No 33 1/2 inverted cone bur
B. No 1/4 round bur
C. Angle former
D. Both A and B *

1184. The rate of carious destruction of dentin tends to be a slower in adults than in children because :

A. Increase in intratubular organic content
B. Chaning in PH of saliva with age
C. Generalised dentinal sclerosis with aging *
D. All of these

1185. When placing a matrix band for a class II amalgam restoration the gingivo-occlusal width of the band should be trimmed :

A. Below the marginal ridge height
B. Equal to height of marginal ridge
C. At least 1 mm greater than expected height of marginal ridge *
D. None of them

1186. Silicate cement restoration are indicated in cases of :

A. Incisal attrition
B. Large cavity in anterior teeth
C. Patients with high caries index *
D. Proximal caries in canines

1187. The Final finishing of silicate restoration is done after :

A. 48 Hours *
B. 24 Hours
C. 30 Minutes
D. 1 Hour

1188. Failure of silicate restoration is mainly due to :

A. Low edge strenght
B. High solubility *
C. Pulp tissue irritation
D. Discolouration

1189. The organic matrix of composite resins contains :

A. Bisphenol glycidyl methacrylate *
B. Dimethyl methacrylate
C. Glycidyl methacrylate
D. None of the above

1190. Hybrid composite resins have a filler content of :

A. 35-50%
B. 70-80% *
C. 85-90%
D. 60-70%