1. The father of operative dentistry is
A. Pierre Fauchard
B. GV Black
C. Edward H. Angle
D. Samuel Hahnemann
ANSWER: B
A is considered to be father of modern dentistry C of orthodontics and D of homeopathy.
2. A popular modification of cavities occurring on both the proximal surfaces of posterior teeth is classified
as;
A. Class VIa
B. Class VIb
C. Class VII
D. All of the above
ANSWER: A
B is cavities on cusp tips and incisal edges of antheriors C is a misnomer.
3. Cavity preparations in which 3 surfaces are involved is called
A. Simple cavity
B. Multiple cavity
C. Complex cavity
D. Complex cavity
ANSWER: C
A is cavity preparation on single surface , B is a misnomer and D is on two surface.
4. If an instrument formula comprises three units, ie “A-B-C”, then “A” denotes
A. Length of Blade
B. Width of Blade
C. height of Blade
D. Angle that blade makes
ANSWER: B
A , B , C denote width length and angle that blade makes , respectively .
5. A Bi-Bevelled instrument is
A. Straight Chiesel
B. Ordinary Hatched
C. Spoon Excavator
D. Angle former
ANSWER: B
A is monobevelled , C is circumferential beveled and D is tri-bevelled instrument .B unlike enamel hatchet (monobevelled) is mono bi-bevelled.
6. The following instrument (s) is not paired as “Right” or “Left”
A. Gingival marginal trimmer
B. Binangle chisel
C. Sppon excavator
D. Enamel Hatched
ANSWER: B
binangle chisel is paired as mesial or distal.
7. A positive rake angle is utilized
A. To cut pathological specimens
B. To cut enamel and dentin
C. Behind radial line
D. All of the above
ANSWER: A
negative take angle lies behind radial line and is used to cut enamel and dentin.
8. Shape of smooth surface caries in enamel is
A. ‘V’ shaped
B. Inverted ‘V’ shaped
C. Lateral spread
D. No particular shape
ANSWER: B
smooth surface caries in enamel is cone – shaped with the apex (smallest area) at the dentino-enamel (DE) junction.
10. Following is not a function of ‘Wedges’
A. Stabilization of band in place
B. Prevention of moisture contamination
C. Separation of teeth
D. None of the above
ANSWER: D
A,B and C are function of wedges.
11. Following is not a function of ‘Separators’
A. Diagnosis of proximal caries
B. Placement of restoration
C. Finishing of restoration
D. None of the above
ANSWER: D
A,B and C are all function of separators.
12. Ultra speed rotary cutting instruments are indicated for all the following except
A. Use at 1,50,000 RPM
B. cavity preparation
C. Removal of old restorations
D. Gross crown cutting
ANSWER: A
ultra speed rotary cutting instruments are indicated for all the following except.
13. Atraumatic restorative treatment technique
A. Is a substitute for conventional restorative procedures
B. Emphasizes excavation of infected rather than affected dentin
C. is also known as manual restorative treatment
D. All of the above.
ANSWER: B
A.R.T is not a substitute but an alternative to conventional restorative treatment for development countries manual restorative treatment is different from ART since it utilize silver amalgam as restorative material.
14. Affected dentin has the following characteristic features, except
A. It is the outermost layer
B. It has a hard consistency
C. It can be stained by basic fuschin dye
D. It is capable of remineralization
ANSWER: C
infected dentin is the inner layer that has soft consistency and is not capable of removalization.
15. Principles(s) of cavity preparation include
A. Restoration form
B. Conveyance form
C. Removal of remaining caries
` D. All of the above
ANSWER: C
A and B are misnomers.
16. The following is/are feature(s) of resistance form in cavity preparation
A. Dovetail
B. Gingival seat groove
C. Reverse curve
D. All of the above
ANSWER: C
A and B are features retention form.
17. ‘Liners’ are usually distinguished from ‘bases’ by all of the following, except
A. Thickness
B. Chemical protection
C. Mechanical support
D. Thermal insulation
ANSWER: C
A and B are features retention form.
18. The advantage(s) of zinc oxide eugenol over zinc phosphate cement is/are
A. Antibacterial property
B. Chemical barrier
C. Reparative dentin formation
D. All of the above
ANSWER: C
varnish prevents polycarboxylate cement from binding to tooth.
19. A prepared cavity with an underlying sub-base and base is classified as
A. Type A
B. Type B
C. Type C
D. Type D
ANSWER: C
A is a cavity that has an underlying liner B has a base and D has two sub-bases well as a base.
20. A fraction occurs in relation to
A. Occlusal,stress bearing cavities
B. Non-occlusal,stress bearing cavities
C. Occlusal, Non-stress bearing cavities
D. Non-occlusal, Non-stress bearing cavities
ANSWER: B
abforcation occurs in cervical areas i.e.class v cavities
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