1 Precipitation of salivary calcium salts to form
calculus is
A. promoted by a higher buffering
capacity.
B. inhibited by a higher buffering*
capacity.
C. inhibited by a higher pH.
D. promoted by a higher pH.
2 A 60-year old patient requests the
replacement of tooth 4.6, which was extracted
many years ago. Tooth 1.6 has extruded
1.8mm into the space of the missing tooth.
The three unit fixed bridge replacing the
mandibular first molar should be fabricated
A. to the existing occlusion.
B. after extracting tooth 1.6 and
replacing it with a fixed partial
denture.
C. after restoring tooth 1.6 to a more*
normal plane of occlusion.
D. after devitalizing and preparing tooth
1.6 for a cast crown.
3) A known insulin-dependent diabetic patient feels
unwell following the administration of a local
anesthetic and becomes pale and sweaty. This
condition does not respond to placing the patient in
a supine position. The most likely cause is
A. syncope.
B. adrenal insufficiency.
C. hyperglycemia.
D. hypoglycemia.*
E. carotid sinus reflex
4 A survey of the master cast shows that the 3.5 and
3.7 abutments for a fixed partial denture have
different paths of insertion with respect to 3.7. A
semi-precision attachment is chosen rather than
preparing the teeth again. Where should the male
part of the attachment ideally be located?
A. Distal of the 3.5 retainer.
B. Distal of the 3.6 pontic.
C. Mesial of the 3.7 retainer.*
D. Mesial of the 3.6 pontic.
5 The best means of extending the working time of
an irreversible hydrocolloid impression material is
to
A. extend spatulation time.
B. add additional water.
C. use cold water.*
D. add a small amount of borax.
E. add potassium sulfate
6 A cast post and core is used to
1. provide intraradicular venting.
2. strengthen a weakened tooth.
3. redirect the forces of occlusion.
4. provide retention for a cast crown.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only*
E. All of the above
7 The prime advantage of vacuum firing of porcelain
is
A. better colour.
B. less shrinkage.
C. more translucency.
D. increased strength.*
8 A 4-year old child has a normal
complement of deciduous teeth, but in
appearance they are grayish and exhibit
extensive occlusal and incisal wear.
Radiographic examination indicates some
extensive deposits of secondary dentin in
these teeth. This condition is typical of
A. cleidocranial dysplasia (dysostosis).
B. amelogenesis imperfecta.
C. neonatal hypoplasia.
D. dentinogenesis imperfecta*
9 A 6-year old patient has a larger than average
diastema between the maxillary central incisors.
The radiographic examination shows a mesiodens.
In order to manage the diastema, you should
extract the mesiodens
A. after its complete eruption.
B. once the patient has reached the age of
12.
C. only if it develops into a cystic lesion.
D. as soon as possible.*
10 When sutures are used to reposition tissue over
extraction sites, they should be
1. placed over firm bone where possible.
2. interrupted, 15mm apart.
3. firm enough to approximate tissue flaps
without blanching.
4. tight enough to produce immediate
hemostasis.
A. (1) (2) (3)
B. (1) and (3)*
C. (2) and (4)
D. (4) only
E. All of the above.
11 A lateral cephalometric radiograph for a patient
with a 3mm anterior functional shift should be
taken with the patient in
A. maximum intercuspation.
B. initial contact.*
C. normal rest position.
D. maximum opening.
E. protrusive position.
12 Which of the following should be checked first
when a cast gold crown that fits on its die cannot
be seated on its abutment?
A. The occlusal contacts.
B. The taper of the preparation.
C. The proximal contacts.*
D. The impression used to pour the cast.
13 Compared to unfilled resins, composite resins have
1. reduced thermal dimensional changes.
2. increased strength.
3. reduced polymerization shrinkage.
4. better polishability.
A. (1) (2) (3)*
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
14 Most zinc-oxide-eugenol cements are not suitable
for permanent cementation of crowns and fixed
partial dentures because of
A. high viscosity.
B. low pH.
C. high solubility in saliva.*
D. adverse pulp response.
15 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.
16 A 42 year-old lethargic patient complains of
constipation, weakness and fatigue. The clinical
examination reveals dry skin, facial swelling and
diffuse enlargement of the tongue. What is the
most likely diagnosis?
A. Infectious mononucleosis.
B. Multiple myeloma.
C. Hypothyroidism.*
D. Hyperparathyroidism.
E. Addisons Disease.
17 A vital canine is to be used as the anterior
abutment of a four unit fixed partial denture and it
has 2mm remaining coronal tooth structure. The
most acceptable foundation restoration would be
A. a bonded amalgam.
B. a pin retained amalgam core build-up.
C. a pin retained composite resin core buildup.
D. intentional devitalization followed by a*
post and core restoration.
18 Benzodiazepines have all of the following
actions EXCEPT
A. muscle relaxation.
B. sedation.
C. amnesia.
D. anticonvulsant action.
E. analgesia.*
19 After performing an apicoectomy, which of the
following should be placed in the bony defect
prior to suturing the flap?
A. Corticosteroids.
B. Antibiotic powder.
C. Oxidized cellulose.
D. Bone wax.
E. Nothing.*
20 Which of the following combinations of
milliamperage and kilovoltage will give Xradiation
with the maximum penetration?
A. 10kVp - 65ma
B. 85kVp - 5ma
C. 90kVp - 10ma*
D. 65kVp - 15ma
E. 75kVp - 40ma
21 Acquired Immune Deficiency Syndrome
(AIDS) may be characterized by
1. candidiasis.
2. rapid weight loss and night sweats.
3. extreme malaise, fever or chills.
4. a smooth and red tongue.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.*
22 During drug-receptor interaction, local
anaesthetics interfere with the transport of
which of the following ions?
A. Sodium.*
B. Calcium.
C. Chloride.
D. Potassium.
E. Magnesium.
23 Which cells migrate into the gingival sulcus in
the largest numbers in response to the
accumulation of plaque?
A. Plasma cells and monocytes.
B. Polymorphonuclear leukocytes.*
C. Macrophages.
D. Lymphocytes.
E. Mast cells.
24 Filters are placed in the path of the x-ray
beam to
A. increase contrast.
B. reduce film density.
C. reduce exposure time.
D. reduce patient radiation dose*
25 Benign neoplasms
1. grow slowly.
2. are generally painless.
3. can be managed conservatively.
4. can metastasize.
A. (1) (2) (3)*
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
26 Which of the following would be a
CONTRAINDICATION for the use of a resin
bonded fixed partial denture (acid etched
bridge or Maryland Bridge)?
A. Class II malocclusion.
B. An opposing free end saddle
removable partial.
C. Previous orthodontic treatment.
D. Heavily restored abutment.*
27 When removing bone or sectioning roots of
teeth with a high-speed handpiece, the
air/water combination should be set with
A. air and water on.
B. water only.*
C. air only.
D. neither air nor water.
