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