2010 Released Qs And Ans2

Front 1

A rubber dam should be used in
A. pulp capping procedures.
B. amalgam placement.
C. composite placement.
D. removing carious dentin from deep
lesions.
E. all of the above.

Back 1

A. pulp capping procedures.
B. amalgam placement.
C. composite placement.
D. removing carious dentin from deep
lesions.

Front 2

The air-water spray used as a coolant in
high speed cutting of a cavity will
1. decrease pulp damage.
2. reduce frictional heat.
3. keep the operating site clean.
4. reduce clogging of cutting
instruments.

E. All of the above.

Back 2

1. decrease pulp damage.
2. reduce frictional heat.
3. keep the operating site clean.
4. reduce clogging of cutting
instruments.

Front 3

During matrix placement for a Class II
cavity preparation, a wedge is placed to
1. separate the teeth.
2. adapt the matrix to the gingival
margin.
3. aid in the creation of a contact.
4. absorb moisture

Back 3

1. separate the teeth.
2. adapt the matrix to the gingival
margin.
3. aid in the creation of a contact

Front 4

Which of the following may affect the
results of electric pulp testing?
A. Emotional factors.
B. Pain threshold.
C. Analgesics.
D. Recent trauma.
E. All of the above.

Back 4

E. All of the above.

Front 5

Which of the following statements is/are
true?
1. Radiographs cannot differentiate
between infected and non-infected
periapical lesions.
2. A definitive diagnosis of an apical
lesion cannot be made on
radiography alone.
3. Periapical radiolucencies are not
always indicative of loss of pulp
vitality.
4. A periapical radiograph can be used
to locate the buccal bone level.

Back 5

1. Radiographs cannot differentiate
between infected and non-infected
periapical lesions.
2. A definitive diagnosis of an apical
lesion cannot be made on
radiography alone.
3. Periapical radiolucencies are not
always indicative of loss of pulp
vitality.

Front 6

Which of the following is/are associated
with the presence of microorganisms in
the bloodstream?
A. Anachoresis.
B. Cavernous sinus thrombosis.
C. Bacteremia.
D. All of the above.

Back 6

D. All of the above.

Front 7

Which of the following is/are true
regarding a tooth filled with a
formaldehyde-containing paste?
A. Formaldehyde-containing pastes
remain non-approved.
B. The drug manufacturer may be
liable, along with the dentist.
C. Formaldehyde-containing pastes
have a high antigenic potential.
D. There are cases on record of
parasthesia following overextrusion
of such a paste in the vicinity of the
mandibular nerve.
E. All of the above.

Back 7

E. All of the above.

Front 8

The desired termination point of apical
root canal preparation when performing
endodontic treatment on a vital tooth is
A. 0.5 to 1mm short of the radiographic
apex.
B. 3mm short of the radiographic apex.
C. slightly through the apical foramen.
D. to the point where the patient feels
sensation.

Back 8

A. 0.5 to 1mm short of the radiographic
apex.

Front 9

Which one of the following is the initial
treatment for internal resorption?
A. Pulpectomy.
B. Pulpotomy.
C. Pulp capping.
D. Apicoectomy.

Back 9

A. Pulpectomy.

Front 10

The proposed mechanism by which a
calcium hydroxide preparation initiates
secondary dentin formation in direct pulp
cappings is by
A. releasing calcium ions.
B. stimulating differentiated ameloblasts
to lay down dentin.
C. stimulating fibroblasts to elaborate
nuclei of the first order.
D. stimulating undifferentiated cells of
the tissue to differentiate into
odontoblasts.

Back 10

D. stimulating undifferentiated cells of
the tissue to differentiate into
odontoblasts.

Front 11

Having just completed endodontic
treatment on a maxillary central incisor,
you are preparing the canal for a post
when you inadvertently perforate the
labial surface of the root. You would
A. extract the tooth.
B. cement the post using zincoxyphosphate
cement.
C. cement the post, then raise a flap and
seal the defect surgically with
amalgam.
D. re-prepare the canal so the post is
now totally within the canal and
cement the post.

Back 11

D. re-prepare the canal so the post is
now totally within the canal and
cement the post.

Front 12

In root resection (apicoectomy) it is
considered good technique to
A. remove as little of the root as
possible.
B. curet the soft tissue lesion in its
entirety.
C. be certain the apex is sealed.
D. All of the above.

Back 12

D. All of the above.

Front 13

A retrograde filling is indicated
A. when the apical foramen cannot be
sealed by conventional endodontics.
B. when a root perforation needs to be
sealed.
C. when conventional endodontics is
impractical.
D. All of the above.

Back 13

D. All of the above.

Front 14

Which of the following has the POOREST
prognosis?
A. Horizontal fracture in the apical onethird
of the root.
B. Horizontal fracture in the mid-root.
C. Horizontal fracture 1-2mm
subgingivally.
D. Vertical root fracture.

Back 14

D. Vertical root fracture.

Front 15

A patient has suffered a blow resulting in
the loosening of three maxillary incisors.
Vitality tests give negative readings. The
most appropriate management would be to
A. perform pulpectomies on the teeth.
B. remove the teeth, fill the root canals
and replant.
C. splint the teeth, check vitality in one
month and if negative, treat
endodontically.
D. splint the teeth and treat
endodontically immediately.

Back 15

C. splint the teeth, check vitality in one
month and if negative, treat
endodontically

Front 16

For composite resin preparations,
cavosurface enamel margins are bevelled
because
1. a bevelled margin produces a more
favorable surface for etching.
2. a bevelled margin improves the edge
strength of the composite resin.
3. after etching, the bonding agent
reduces microleakage.
4. the procedure eliminates the need to
polish the restoration.

Back 16

1. a bevelled margin produces a more
favorable surface for etching.
3. after etching, the bonding agent
reduces microleakage

Front 17

Retention of a gold inlay is improved by
1. addition of an occlusal dovetail.
2. increasing the parallelism of walls.
3. lengthening the axial walls.
4. placing a gingival bevel.

Back 17

1. addition of an occlusal dovetail.
2. increasing the parallelism of walls.
3. lengthening the axial walls.

Front 18

When using ultra high speed cutting
instruments for cavity preparation, the heat
generated is directly related to the
1. duration of cutting.
2. size, speed and sharpness of the bur.
3. use of air and water spray.
4. existing pulp pathology.

Back 18

1. duration of cutting.
2. size, speed and sharpness of the bur.
3. use of air and water spray

Front 19

Which of the following instruments can be
used for placing gingival bevels on inlay
preparations?
1. Margin trimmers.
2. Enamel hatchets.
3. Carbide finishing burs.
4. Small diamond disks.

Back 19

1. Margin trimmers.
3. Carbide finishing burs.

Front 20

In restoring occlusal anatomy, the
protrusive condylar path inclination has its
primary influence on the morphology of
A. cusp height.
B. anterior teeth only.
C. mesial inclines of maxillary cusps
and distal inclines of mandibular
cusps.
D. mesial inclines of mandibular cusps
and distal inclines of maxillary
cusps.

Back 20

D. mesial inclines of mandibular cusps
and distal inclines of maxillary
cusps.

Front 21

Which of the following statements are true
concerning the adult mandible?
1. The mandibular foramen lies in the
centre of the mandibular ramus both
in the vertical and horizontal planes.
2. The angle formed by the junction of
the ramus and the body of the
mandible is an acute one.
3. The genial tubercles are attachments
for the anterior bellies of the digastric
muscles.
4. The temporalis muscle attaches to the
lateral surface of the coronoid
process.

Back 21

1. The mandibular foramen lies in the
centre of the mandibular ramus both
in the vertical and horizontal planes
4. The temporalis muscle attaches to the
lateral surface of the coronoid
process.

Front 22

A lingual approach for a conservative
Class III preparation for a composite resin
requires
A. a retentive internal form.
B. parallelism of the incisal and gingival
walls.
C. maintenance of the incisal contact
area.
D. All of the above.

Back 22

D. All of the above.

Front 23

Sterilization of carious dentin without pulp
injury is assured by the application of
A. phenol.
B. 70% ethyl alcohol.
C. chlorhexidine.
D. absolute alcohol.
E. None of the above.

Back 23

E. None of the above.

Front 24

In composite resin restorations,
polycarboxylate cements are used as a
base because they are
A. sedative to a hyperemic pulp.
B. neutral in colour.
C. biocompatible.
D. None of the above.

Back 24

C. biocompatible.

Front 25

The cell of the dental pulp most capable of
transforming into other cells is the
A. fibroblast.
B. undifferentiated mesenchymal cell.
C. odontoblast.
D. histiocyte.

Back 25

B. undifferentiated mesenchymal cell.

Front 26

Which of the following tests is most useful
in differentiating between an acute apical
abscess and an acute periodontal abscess?
A. Palpation.
B. Radiography.
C. Percussion.
D. Pulp vitality.

Back 26

D. Pulp vitality.

Front 27

Severe throbbing tooth pain which
increases when the patient lies down is a
symptom of
A. a pulp polyp (chronic hyperplastic
pulpitis).
B. late stage of acute pulpitis (acute
suppurative pulpitis).
C. chronic pulpitis (chronic ulcerative
pulpitis).
D. chronic apical abscess.
E. pulp hyperemia.

Back 27

B. late stage of acute pulpitis (acute
suppurative pulpitis).

Front 28

What clinical evidence would support a
diagnosis of acute dento-alveolar abscess?
1. A negative reaction to the electric
vitality tester.
2. A positive reaction of short duration
to cold.
3. A positive reaction to percussion.
4. Presence of a draining fistula.

Back 28

1. A negative reaction to the electric
vitality tester
3. A positive reaction to percussion.

Front 29

Which of the following microorganisms
are most frequently found in infected root
canals?
A. Streptococcus viridans.
B. Staphylococcus aureus.
C. Lactobacilli.
D. Enterococci.
E. Staphylococcus albus.

Back 29

D. Enterococci.

Front 30

The mechanical objectives of preparing
the root canal system for obturation with
gutta-percha should include
A. development of a continuously
tapering cone in the root canal.
B. removal of irregularities.
C. maintenance of an intact foramen.
D. All of the above.

Back 30

D. All of the above.