2010 Released Qs And Ans3

Front 1

Metallic salts are included in root canal
sealers to make the sealers
A. set more firmly.
B. be radiopaque.
C. set more rapidly.
D. be tolerated by periapical tissues.

Back 1

B. be radiopaque

Front 2

Which of the following conditions would
NOT require antibiotic premedication
before endodontic therapy?
A. Valvular heart disease.
B. Cardiac prosthesis.
C. Persistent odontogenic fistula.
D. Immuno-suppressive therapy.
E. Organ transplant.

Back 2

C. Persistent odontogenic fistula

Front 3

Root canal therapy may be safely and
successfully undertaken for
1. hemophiliacs.
2. patients with a history of rheumatic
fever.
3. patients with rheumatoid arthritis.
4. cerebral palsy patients.
5. adolescent diabetics.

Back 3

D. All of the above.

Front 4

Which of the following are true statements
about incision and drainage of an acute
apical abscess?
1. A rubber dam drain may be placed
and sutured to assist drainage.
2. The procedure is only indicated with
a localized, fluctuant swelling.
3. Profound anesthesia of the surgical
site is not always possible.
4. Relief of the pressure and pain is
immediate after treatment.

Back 4

E. All of the above.

Front 5

In the mandibular first premolar, the
occlusal dovetail of an ideal disto-occlusal
amalgam preparation is usually not
extended into the mesial fossa because of
the
A. small lingual lobe.
B. large buccal cusp.
C. large buccal pulp horn.
D. prominent transverse ridge.

Back 5

D. prominent transverse ridge

Front 6

When removal of carious dentin results in
an exposure of non-vital pulp, the
treatment of choice is to
A. institute endodontic treatment.
B. cap the exposed pulp horn with
calcium hydroxide.
C. occlude the cavity with a light
packing of cotton moistened with
eugenol.
D. place a temporary restoration and
observe.

Back 6

A. institute endodontic treatment.

Front 7

In the restoration of a tooth, cavity varnish
reduces
A. ion migration from amalgam to tooth.
B. transfer of thermal changes.
C. amalgam corrosion.
D. galvanic stimulation of the pulp.

Back 7

A. ion migration from amalgam to tooth.

Front 8

The initial treatment of choice for a
16 year old patient, who presents with
multiple extensive carious lesions, is to
place the patient on a preventive regime
and to
A. place amalgam restorations over the
next few months.
B. excavate caries and place temporary
restorations within the next few
weeks.
C. delay any treatment until the hygiene
improves.
D. restore all teeth with composite resin
over the next few months.

Back 8

B. excavate caries and place temporary
restorations within the next few
weeks.

Front 9

During cavity preparation under rubber
dam, a small mechanical exposure occurs.
The correct procedure is to
A. swab the exposure with eugenol.
B. place calcium hydroxide over the
exposure.
C. perform a pulpotomy.
D. perform a pulpectomy.

Back 9

B. place calcium hydroxide over the
exposure.

Front 10

A protective mechanism of the dental pulp
to external irritation or caries is the
formation of
A. pulp stones.
B. secondary dentin.
C. secondary cementum.
D. primary dentin

Back 10

B. secondary dentin.

Front 11

Fractured incisal angles in the permanent
teeth of adolescent patients are best
restored using
A. stainless steel crowns.
B. gold castings.
C. full coverage restorations.
D. acid etch composite resin techniques.

Back 11

D. acid etch composite resin techniques.

Front 12

When odontoblasts are destroyed or
undergo degeneration, they are replaced
by
A. ameloblasts.
B. undifferentiated mesenchymal cells.
C. multinucleated giant cells.
D. osteoblasts

Back 12

B. undifferentiated mesenchymal cells

Front 13

In an 80-year old patient you would expect
A. a reduced size of the pulp chamber.
B. increased incidence of pulp stones.
C. increased tendency to pulpal fibrosis.
D. All of the above.

Back 13

D. All of the above.

Front 14

In teeth with complete pulp necrosis, the
periapical area is involved if
1. there is pain to thermal stimuli.
2. there is pain on percussion.
3. the tooth throbs when the patient is
lying down.
4. the radiograph shows an apical
radiolucency.

Back 14

2. there is pain on percussion.
4. the radiograph shows an apical
radiolucency.

Front 15

The prognosis for an avulsed tooth is
principally affected by
A. length of time the tooth was out of
the mouth.
B. condition of the socket when the
tooth was replanted.
C. removal of necrotic cementum.
D. pulp extirpation.

Back 15

A. length of time the tooth was out of
the mouth.

Front 16

Which of the following could be
immediate postoperative complications of
periapical surgery?
1. Haemorrhage.
2. Edema.
3. Paresthesia.
4. Pain.
5. Mucocele.

Back 16

1. Haemorrhage.
2. Edema.
3. Paresthesia.
4. Pain.

Front 17

The muscle primarily responsible for
moving the mandible to a lateral position
is the
A. masseter.
B. lateral (external) pterygoid.
C. medial (internal) pterygoid.
D. buccinator.
E. temporalis.

Back 17

B. lateral (external) pterygoid.

Front 18

Which of the following muscles comprise
the retromolar pad?
1. Lateral (external) pterygoid.
2. Buccinator.
3. Palatoglossus.
4. Superior constrictor.

Back 18

2. Buccinator.
4. Superior constrictor.

Front 19

Profile features of extreme overjet,
recessive chin and deep labial mento-labial
sulcus in the chin are referred to as
A. prognathic relationship.
B. mesognathic relationship.
C. retrognathic relationship.
D. crossbite relationship.

Back 19

C. retrognathic relationship.

Front 20

What are the purposes of using occlusal
splints?
1. To change the pattern and degree of
tactile afferent neural impulses.
2. To immobilize teeth.
3. To produce a permanent change in the
occlusion.
4. To prevent teeth from disturbing
occlusal sensory input.

Back 20

1. To change the pattern and degree of
tactile afferent neural impulses.
2. To immobilize teeth

Front 21

The success of indirect pulp capping is
dependent upon
A. removal of all caries at the enameldentin
junction.
B. use of calcium hydroxide.
C. a well sealed restoration.
D. All of the above.

Back 21

D. All of the above.

Front 22

Which of the following are characteristic
symptoms of acute suppurative pulpitis?
1. Spontaneous throbbing pain.
2. Prolonged pain initiated by heat.
3. Increased pain while lying down.
4. Increased pain by cold.

Back 22

E. All of the above.

Front 23

Histologically, a pulp polyp consists of
1. a mass of collagenous fibres.
2. Russell bodies.
3. proliferating capillaries.
4. fibroblasts.
5. polymorphonuclear leucocytes.

Back 23

1. a mass of collagenous fibres.
3. proliferating capillaries.
4. fibroblasts.
5. polymorphonuclear leucocytes.

Front 24

Which of the following conditions is most
likely to be associated with a draining
fistula?
A. Chronic periapical periodontitis.
B. Reversible pulpitis.
C. Hypercementosis.
D. Traumatic bone cyst.

Back 24

A. Chronic periapical periodontitis.

Front 25

The most important principle dictating
location and size of access to the root
canal system is
A. preservation of tooth structure.
B. removal of all caries.
C. straight line access to the canal.
D. removal of all pulp horns.

Back 25

C. straight line access to the canal.

Front 26

A child has a carious exposure of the pulp
in the first molar. The cavity is filled with
pink tissue which bleeds when punctured
by the explorer. The tissue is slightly
sensitive to touch. This is indicative of
A. acute ulcerative pulpitis.
B. chronic serous pulpitis.
C. chronic hyperplastic pulpitis.
D. periapical osteofibrosis.

Back 26

C. chronic hyperplastic pulpitis.

Front 27

Special attention is given to matrix
adaptation for the insertion of amalgam in
a MO cavity in a maxillary first premolar
because of the
A. concavity in the cervical third of the
mesial surface of the crown.
B. restoration being in the esthetic zone.
C. unusual position of the contact area.
D. buccolingual width of the tooth's
mesial marginal ridge.
E. size of the interproximal gingival
embrasure.

Back 27

A. concavity in the cervical third of the
mesial surface of the crown.

Front 28

The difference(s) between deciduous and
permanent teeth isçare best described by
the following statement(s):
A. The deciduous root trunk is shorter.
B. The deciduous enamel is thinner and
appears whiter.
C. The deciduous molar roots flare
more.
D. (A) and (C)
E. All of the above.

Back 28

E. All of the above.

Front 29

Function(s) of the dental pulp include(s)
1. defensive.
2. sensory.
3. circulatory.
4. dentin repair.

Back 29

E. All of the above.

Front 30

Treatment of primary herpetic
gingivostomatitis should include
1. palliative treatment.
2. steroid therapy.
3. control of secondary infection.
4. application of dilute hydrogen
peroxide.

Back 30

1. palliative treatment.
3. control of secondary infection.

Front 31

Tooth mobility may be due to
1. excessive occlusal force.
2. decreased osseous support.
3. periodontal abscess.
4. gingival inflammation.

Back 31

1. excessive occlusal force.
2. decreased osseous support.
3. periodontal abscess.

Front 32

Calcium hydroxide materials are indicated
for indirect pulp capping because the
A. calcium ions are absorbed into the
decalcified dentin.
B. acidity of the active caries process is
neutralized by the calcium hydroxide
ions.
C. calcium hydroxide forms an
impermeable barrier to the active
caries process and allows the pulp to
heal.
D. alkalinity of calcium hydroxide
stimulates the reparative process
within the vital pulp tissue.

Back 32

D. alkalinity of calcium hydroxide
stimulates the reparative process
within the vital pulp tissue.

Front 33

An incipient carious lesion on an
interproximal surface is usually located
A. facial to the contact area.
B. lingual to the contact area.
C. gingival to the contact area.
D. occlusal to the contact area.

Back 33

C. gingival to the contact area.

Front 34

Sclerotic dentin is
A. soft.
B. hypersensitive.
C. resistant to caries.
D. injurious to the pulp.

Back 34

C. resistant to caries.

Front 35

In placing an amalgam, interproximal
wedging will be most effective in
controlling the
A. buccal contour.
B. gingival contour.
C. lingual contour.
D. marginal ridge contour

Back 35

B. gingival contour.

Front 36

A primordial cyst
A. develops in place of a tooth.
B. attaches to the apex of a tooth.
C. attaches to the crown of a tooth.
D. remains after the tooth is extracted.

Back 36

A. develops in place of a tooth.

Front 37

Osteogenesis imperfecta is manifested by
A. punched-out radiolucencies in the
jaws.
B. numerous unerupted supernumerary
teeth.
C. osteoporosis and anemia.
D. multiple fractures and blue sclera

Back 37

D. multiple fractures and blue sclera

Front 38

Eosinophilic granuloma
A. is found only at the apices of nonvital
teeth.
B. occurs in infants.
C. is a non-lipid reticulo-endotheliosis.
D. is caused by a virus.

Back 38

C. is a non-lipid reticulo-endotheliosis.

Front 39

Dysplastic lesions of squamous epithelium
occur most often on the
A. palate.
B. gingiva.
C. buccal mucosa.
D. dorsum of the tongue.
E. floor of the mouth.

Back 39

E. floor of the mouth.

Front 40

Diabetes mellitus is the result of
A. hypersecretion of the posterior
pituitary.
B. atrophy of the islands of Langerhans.
C. destruction of the adrenal cortex.
D. destruction of the posterior pituitary
or associated hypothalamic centres

Back 40

B. atrophy of the islands of Langerhans.

Front 41

Widening of the periodontal space is NOT
seen radiographically in
A. trauma from occlusion.
B. orthodontic tooth movement.
C. scleroderma.
D. Paget's disease.

Back 41

D. Paget's disease.

Front 42

In complete dentures, the external oblique
line is used as a guide for the
A. position of the posterior teeth.
B. height of the occlusal plane.
C. termination of the buccal flange.
D. termination of the lingual flange

Back 42

C. termination of the buccal flange.

Front 43

The Plaque Index of Silness and Loe
measures
A. quantity of plaque at the gingival
margin.
B. colony forming units of Gramnegative
bacteria.
C. weight of plaque obtained from
facial surfaces.
D. weight of plaque obtained from the
clinical crown.

Back 43

A. quantity of plaque at the gingival
margin.

Front 44

Which are best for overdenture
abutments?
A. Central incisors.
B. Second premolars.
C. Cuspids.
D. First premolars.

Back 44

C. Cuspids.

Front 45

For complete dentures, the most critical
factor affecting speech is the
A. reproduction of rugae.
B. positioning of molar teeth.
C. positioning of anterior teeth.
D. palatal thickness.

Back 45

C. positioning of anterior teeth.

Front 46

Prevention of gingival irritation by a major
connector of a removable partial denture is
accomplished by
A. using split palatal bars.
B. reducing the size of the connector.
C. ensuring maximum distribution of
occlusal forces.
D. providing relief between the
connector and the gingiva

Back 46

D. providing relief between the
connector and the gingiva

Front 47

After completion of initial therapy which
included root planing and curetage, a
patient has suprabony pockets of 5mm.
Despite good plaque control, these pockets
exhibit bleeding on probing. The treatment
of choice is
A. additional root planing.
B. occlusal adjustment.
C. gingivectomy.
D. periodontal flap surgery.
E. None of the above.

Back 47

D. periodontal flap surgery.

Front 48

The treatment of an ameloblastoma is
A. chemotherapy.
B. enucleation.
C. resection.
D. radiotherapy.
E. None of the above.

Back 48

C. resection.

Front 49

A mixed dentition analysis is used to
determine if sufficient room exists for the
eruption of the permanent
A. canines.
B. canines and premolars.
C. molars.
D. molars and premolars

Back 49

B. canines and premolars.

Front 50

The muscle attached to the labial surface
of the maxilla above the region of the
central incisors is
A. labii inferioris.
B. labii superioris.
C. orbicularis oris.
D. risorius.
E. caninus.

Back 50

C. orbicularis oris.