462.Advantages of Mcspaden technique are all except

a.economy of time

b.rapid filling of canals apically and laterally

c.ease of selection and treatment

d.can be used in narrow canals

Ans-d.can be used in narrow canals

383.The deviation of the apical foramen from the centre of root apex

a.0-0.2mm

b.0.2-0.5mm

c.0.5-1mm

d.1-2mm

Ans-b.0.2mm-0.5mm

241.For how long EDTA remains active within the root canal if not inactivated?

a.5days
b.8days
c.10days
d.15days

Ans-5 days

240.Ruddles'solution contains

a.5%NaOCl&H2o2
b.5%NaOCl,Ca(oH)2& 17%EDTA
c.5%NaOCl,Hypaque& 17%EDTA
d.17%EDTA,Urea peroxide&Propylene glycol

Ans-c.5%NaOCl,Hypaque& 17%EDTA

239.All are true for home bleaching,except

a.Uses 15%carbamide peroxide
b.In addition to bleaching agent carbapol is used
c.Vacuum from vinyl trays are used
d.Both arches bleached simultaneously


Ans-d.Both arches bleached simultaneously

Explanation-sturdvent 4th ed pg 610-612
It is recommended that only one arch be bleached at a time, beginning with maxillary arch.bleaching the maxillary arch first allows theuntreated mandibular arch to serve as a comparison.

223.Which material listed below has historically been the retrofilling material of choice?

a.Composite
b.Zinc-free amalgam
c.Gutta-percha
d. Methyl methacrylate

Ans.b.Zinc-free amalgam

Explanation:A retrofilling (also called a reverse filling or retrograde amalgam filling) is placed to seal the apical
portion of the root canal. This procedure is used when an apicoectom y alone will not yield a good
result. Whenever there is any chance whatsoever that an apical seal may be faulty, a reverse filling
material must be placed.

68. Internal resorption is :

a)radiolucency over unaltered canal

b) usually in a response to trauma

c) radiopacity over unaltered canal

ANS b

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67.The best way to clean the cavity before the placement of G.I.C is.

a )H2o2 b) phosphoric acid

c)poly acrylic acid

Ans. c

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66.Files are used in endodontic preperation to:

1.clean 2.shape

3.improve access 4.facilitate obturation

a.all b.1,2,3 c.1,2,4 d.2,3,4

ANS : c

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65. which of the following represents the most significant advantage of using acid etch techinque :

1.microleakage 2.setting shrinkage of restorative material

3.coefficient of thermal expansion of restorative material

4.reduced porosity of restoration


ANS. 1.
Microleakage

in this procedure the tooth surface enamel is treated for about for about one minute with acid etch solution or gel 30-50%phosphoric acid.

CONTRIBUTED BY: Dr. AMIR FROM EGYPT

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64.E.D.T.A. is chelating agent that:

1.lubricates

2.emulsifies

3.hold debris in suspension

4.remove smear layer

5.all of the above

ANS. 5

REF.pathway of the pulp eighth edition p.259

CONTRIBUTED BY: Dr. AMIR FROM EGYPT

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9.

9. Difference between physical characteristics of a file & reamer is:
A. The cross-section of reamers is square and files are triangular in cross section.
B. The numbers of flutes on the blade are more in files than in reamers.
C. The reamers have more flutes in the blade.
D. Files have two superficial grooves to produce flutes in a double helix design.
--------------------------------------------------------------------------------------------------------
9. Answer is: B- The numbers of flutes on the blade are more in files than in reamers.
(Ref. Grossman 11th Ed/ 195) Repeat AIIMS-MAY-06.

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1.

1. Sterilization of Gutta percha points is done by:
A. Hot salt sterilizer
B. Autoclaving
C. Chemical solutions
D. Dry heat.
----------------------------------------------------

1. Answer is: C- Chemical solutions.
(Ref: Grossman-11th Ed/ Pg 140) Repeat AIPG-06.


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