Q1)Fill the blanks with most appropriate choice (23 marks)
1. The internal wall parallel with the long axis of the tooth is called ---------------------a. Axial wall
b. Pulpal wall
c. External wall
d. Floor or Seat
2. The junction of two planes surfaces of different orientation is called ----------------------a. Line angle
b. Point angle
c. Acute angle
d. Right angle
3. Cavities on the gingival third of the facial and lingual surfaces of all teeth are called ----------------a. Class II
b. Class III
c. Class IV
d. Class V
4. ----------------------------- is instrument used for removal of caries and refinement of the internal
parts of the cavity.
a. Excavator
b. Chisel
c. File
d. Condensing instrument
5. ----------------- used for preparation of retentive pinholes and grooves.
a. Fissure bur
‫ مثنى شعبان رجب‬.‫م‬.‫أ‬
b. Small round bur
c. Large round bur
d. Inverted cone bur
‫جامعة تكريت – كلية‬
6. Axiopulpal line angle should be ----------------------.
a. Rounded
‫طب االسنان‬
b. Beveled
c. Sharp
d. Dull
7. The buccal and lingual walls of the box are ----------------- proximally.
a. Diverge
b. Parallel
c. Converge
d. Perpendicular
8. ----------------------- is the area present at the junction between the occlusal part and proximal part
of the cavity.
a. Embrasure
b. Isthmus
9.
10.
11.
12.
13.
14.
15.
16.
c. Dovetail
d. Convenient
-------------------------- is tooth loss at the cervical area of the tooth due to abrasive slurry
between two surfaces.
a. Caries
b. Erosion
c. Abrasion
d. Corrosion
All class III cavity should be filled with tooth colored restorative material except -----------a. the distal surface of mandibular canine
b. the mesial surface of maxillary canine
c. the mesial surface of mandibular canine
d. the distal surface of maxillary canine
The width of the bevel of cl III cavity preparation should be --------------a. 0.25 to 2 mm
b. 0.5 to 4 mm
c. 0.25 to 0.5 mm
d. 2 to 4 mm
---------------------- are used to provide thermal protection for the pulp and to supplement
mechanical support.
a. Liners
b. Bases
c. Sealers
d. Cements
‫رجب‬
‫شعبان‬
.‫م‬.‫أ‬the
---------------------------- recommended when a cavity preparation leaves
little
dentin ‫مثنى‬
covering
pulp or when a micro pulp exposure is suspected.
a. Zinc oxide euginol cement
‫جامعة تكريت – كلية‬
b. Zinc phosphate cement
c. Zinc polycarboxylate cement
‫طب االسنان‬
d. Calcium hydroxide cement
For dissipating the heat of reaction, permit a greater quality of powder and smoother mix as
well as longer working time and less acidity, is achieved by -------------------a. incorporating small increments of powder over a large area of the slab
b. placing the slab under cool water or in a refrigerator
c. Using cement spatula and glass slab
d. Adding drop of water to the mixture
Zinc oxide euginol has --------------------a. Acidic
b. Base
c. Neutral
d. None of the above
Gamma 2 in amalgam restoration has ----------------
17.
18.
19.
20.
21.
22.
23.
a. Highest strength with intermediate corrosion resistance.
b. Intermediate strength, high corrosion resistance.
c. Lowest strength, greater creep, low corrosion resistance.
d. None of the above
The goal of amalgam polishing is to produce a smooth surface that reduced the likelihood of ----------------a. Caries
b. Creep
c. Corrosion
d. Chipping
To prevent over hang amalgam we use ------------------a. Matrix band
b. Wedge
c. Retainer
d. All the above
Contamination with saliva increases ----------------- of the amalgam restoration.
a. Leakage
b. Creep
c. Shrinkage
d. High spot
------------------------------- are primarily unfilled acrylic monomer mixtures, similar to the matrix of
the composite
a. Etching systems
b. Bonding systems
‫ مثنى شعبان رجب‬.‫م‬.‫أ‬
c. Fillers
d. Compomers
The activator in light cured composite is --------------------‫جامعة تكريت – كلية‬
a. Benzophenon
b. Tertiary amine
‫طب االسنان‬
c. Diketone
d. Benzoyl peroxide
Microfilled composite has -----------------a. 8 µm Quartz filler
b. Very small colloidal silica particles(0.01 - 0.04 µm)
c. No fillers
d. None of the above
Most self-cured composite restorations require approximately ----------------------- for the
complete procedure
a. Unlimited time
b. 4.30 minutes
c. 2.30 minutes
d. 60 seconds
24. Longer exposure of the composite to the light usually is required for the polymerization of----------------------------.
a. Opaque shades
b. Translucent shades
c. Thick layers
d. Thin layers
25. Dental pins should be placed ------------------------a. Within the enamel
b. At the dentinoenamel junction
c. Within the dentin
d. All the above
26. --------------------- is the part of the bridge that replaces the missing tooth, which is the suspended
part of the bridge.
a. Connector
b. Abutment
c. Pontic
d. Retainer
27. In ------------------------------- the pontic is connected to a gold bar that is also connected to a
retainer which is away from the pontic.
a. Fixed-fixed bridge
b. Simple cantilever bridge
c. Spring cantilever bridge
d. Fixed removable bridge
28. Crown and bridge cannot be made under age of 18 years due to ----------------------‫ مثنى شعبان رجب‬.‫م‬.‫أ‬
a. Poor periodontal condition
b. Unerupted third molars
c. Difficult to manage the children
‫جامعة تكريت – كلية‬
d. large pulp and continuous eruption of the teeth
29. Increase the ----------------------- of the prepared tooth lead to decrease in bridge retention.
‫طب االسنان‬
a. Surface area
b. Tapering
c. Occlusogingival length
d. All the above
30. During crown preparation, orientation grooves are placed -------------------------a. On occlusal surface
b. On occlusal and buccal surfaces
c. On occlusal, buccal and lingual surfaces
d. On all tooth surfaces
31. In crown preparation of the----------------, the buccal surface should be reduced into two planes
a. lower posterior teeth
b. upper posterior teeth
c. lower anterior teeth
32.
33.
34.
35.
36.
37.
38.
39.
d. upper anterior teeth
tapering of proximal surfaces of crown preparation should be -------------a. 2 degrees
b. 6 degrees
c. 30 degrees
d. 45 degrees
We use ------------------------------ crown when we need maximum retention.
a. Full veneer with facing
b. Porcelain fused to metal
c. Partial veneer
d. Full metal
Provisional restoration should not impinge upon the gingival tissue, otherwise it could result in -------------------a. Hypertrophy
b. Recession
c. Hemorrhage
d. All the above
Polymethyl methacrylate used for indirect provisional restoration only because ---------------------a. Less wear resistance
b. High heat of polymerization
c. High polymerization shrinkage
d. Bad taste
Usually provisional restoration is cemented with --------------------------a. Zinc oxide euginol cement
‫ مثنى شعبان رجب‬.‫م‬.‫أ‬
b. Zinc polycarboxylate cement
c. Zinc phosphate cement
d. Glass ionomer cement
------------------------- belongs to elastomeric impression materials. ‫جامعة تكريت – كلية‬
a. Alginate
‫طب االسنان‬
b. Silicon rubber base
c. Agar-agar
d. Impression compound
In two stages impression light body is placed ---------------------a. On the prepared teeth.
b. In the special tray.
c. Both of them.
d. None of the above.
Patient suffers from pain in cold and hot drinks. This because -----------------------------a. deep cavity preparation
b. insufficient cement
c. high spot
d. dental pin
40. Treatment of choice for 14 years old patient with extensive fractured incisal edge ofupper
central incisor is ----------------a. cl III
b. cl IV with dovetail
c. cl IV with pin
d. full veneer crown
41. Proper impression should include --------------------a. prepared tooth
b. half of dental arch
c. complete dental arch
d. both dental arches
42. Secondary caries beneath full crown may be due to --------------a. improper finishing line
b. high spot
c. high carbohydrate intake
d. all the above
43. Distal caries in maxillary canine with missing maxillary first premolar should berestored with -----------------------a. amalgam restoration
b. composite restoration
c. glass ionomer restoration
d. full veneer crown
44. Mesial and distal walls of cl I cavity should be ----------------a. converge
‫ مثنى شعبان رجب‬.‫م‬.‫أ‬
b. diverge
c. rounded
d. beveled
‫جامعة تكريت – كلية‬
45. Number of dental pins --------------------- retention of restoration.
a. increases
‫طب االسنان‬
b. decreases
c. increases with limit
d. decreases with limit
46. ------------------ bur is used to finish crown preparation.
a. round
b. pear shaped
c. inverted cone
d. flame shaped
47. It is preferred to use ----------------------- with dental pin.
a. Regular
b. Finecut
c. Microcut
d. Sphere
Q2) List the roles for resistance form of cl I cavity preparation. (6 marks)
Q3) List the requirement of good provisional restoration. (6 marks)
‫ مثنى شعبان رجب‬.‫م‬.‫أ‬
‫جامعة تكريت – كلية‬
‫طب االسنان‬