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MCQ

Endodontics-Access

Q1

What is the objective of coronal access?

A) To expose and unroof the pulp chamber to gain visibility, icluding removal of pulp horns
B) To locate the canal openings
C) To enable a small file to be placed down the canal openings

Q2

What instrument is NOT ever needed for access preparation?

A) High speed diamond burs
B) RA Steel round burs
C) Gates Glidden Drills
D) Long shank burs
E) Swan neck burs

Q3

How can you identify dentine on the floor of the pulp chamber in a molar?


A) It is smooth
B) It is grey
C) It is knobbly
D) It is dark brown
E) It is hard

Q4

What shape is the access cavity for upper and lower incisors?


A) Triangular
B) Ovoid
C) Round
D) Oblong
 

Q5

What shape is the access cavity for upper and lower canines?


A) Triangular
B) Ovoid
C) Round
D) Oblong
 

Q6

What shape is the access cavity for upper and lower premolars?

A) Triangular
B) Ovoid
C) Round
D) Oblong

 Q7

What shape is the access cavity for upper and lower molars?

A) Triangular
B) Ovoid
C) Round
D) Oblong

Q8

How many upper incisors have two canals?

A) Hardly any
B) 5%
C) 25%
D) 50%
E) 75%
F) 95%

Q9

How many lower incisors have two canals?

A) Hardly any
B) 5%
C) 25%
D) 50%
E) 75%
F) 95%

Q10

Where is an 'extra' canal often found in upper molars?

A) Mesiobuccal root
B) Distobuccal root
C) Palatal root
D) mesiolingal root

Q11

The opening of the distal canal(s) in molars is usually directly under


A) The distal marginal ridge
B) The centre of the tooth
C) The buccal groove
D) The palatal fissure
E) The cusp of Caribelli

Q12

Upper first premolars usually have

A) One canal
B) Two canals
C) Three canals

Q13

Upper second premolars usually have


A) One canal
B) Two canals
C) Three canals

Q14

If the canal orifice in an upper second premolar appears under the buccal cusp, one might suspect


A) Pulpal sclerosis
B) A palatal canal
C) Internal resorbtion

 Q15

When preparing an access cavity, you find what appears to be the canal opening much earlier than expected. What might explain this?


A) Incorrect measurement of the pre-op radiograph
B) You have hit a pulp horn
C) Internal resorbtion

Q16

When preparing an access cavity, you come across an orange-yellow slurry inside the pulp chamber. What is it likely to be?

A) Pus
B) Ledermix placed by a previous dentist
C) Necrotic pulp
D) Unset composite resin

Q17

True or false? After entering the pulp chamber, an option is to continue preparation without water spray.


A) True
B) False

 

Q18

True or false? You should not normally extend the access for anterior teeth under the cingulum.


A) True
B) False

 Q19

Why is often advisable to remove an artificial crown from a tooth before preparing an access cavity?


A) Metal shavings may drop into the canal
B) The metal will create false readings when the electronic apex locator is used
C) The tooth may be rotated or tilted under the crown, and the crown just makes it look straight.
D) Dam clamps may loosen the crown

 

Q20

To find pulp horns, which instrument is most useful?


A) A Briault Probe
B) A file with a curved tip
C) A small round bur
D) A Hedstrom File

Answers

 

1

 

1a,2c,3b,4a,5b,6d,7a,8a,9d,10a,11b,12b,13a,14b,15b,16b,17a,18b,19c,20a

 

 
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