hi,need help with these please,thanks
46. You could use a large condenser and lateral condensation in
which alloy?
a. lathe cut
b. admixed
c.
sphericald. high copper
e. low copper
47. Which of the following can cause a deficient margin in the
proximal of an amalgam restoration?
a. tight matrix
b. no contouring of the band
c.
large increment of amalgam
d. no wedge used
48. Where is recurrent decay most seen in class II composite?
a. facioproximal
b. linguoproximal
c.
gingivoproximald. occlusal
49. Cantilever bridges are not good in the long term BECAUSE
periodontal forces are best along the long axes of teeth.
a. statement is correct reason is not
b
. statement and reason are correct NOT related
c. statement and reason are correct and related
d. statement is wrong but reason is correct
e. both are wrong
50. A patient has a high caries index short crowns and minumum
horizontal overlap. What restoration will you place?
a. ¾ crown
b. jacket crown
c.
PFMd. resin bonded retainer
51. There is a small carious lesion in the superficial part of the
lissure. How will you treat it?
a. composite
b. sealant
c.
enameloplastyd. amalgam?????????????????
52. A class V for amalgam and composite are same EXCEPT?
a. uniformly placed in dentin
b. retention grooves placed
c.
sharp internal anglesd. need for contouring
53. How do you diagnose class III caries?
a. x-ray
b. vitality test
c.
transillumination
54. If you are doing a class II prep and there is a a deep axial
wall, where do you place the retention?
a.
on the buccal and lingual wall
55. The direction of mesial and distal walls of a Class V amalgam cavity
preparation is determined by the
a. necessity of retention
b. size of carious lesion
c.
direction of the enamel rods
d. gingivoaxial and occlusoaxial line angles
56. When pins are included in an amalgam cavity preparation, the strength of the
amalgam is
a. increased
b.
decreasedc. unchanged
57. It has become necessary to remove a conservative DO inlay from maxillary
second premolar. The method of choice is to
a. break the cement bond with chisel and mallet
b. use a threaded-type inlay remover to lift the inlay
c. cut the inlay out completely with rotary instruments
d. use a conventional crown and bridge remove4r to break the cement bond.
e.
Cut through the isthmus to remove the proximal and the occlusal in two
pieces
58. When removing a rubber dam, the first step should be to
a. remove the clamp
b. release the holder
c. apply a water-soluble lubricant
d.
cut the interseptal rubber with scissors???
e. massage the gingival tissues under the dam
59. Cavity varnish is indicated under amalgam restorations because cavity
varnish
a. prevents galvanic currents from reaching the pulp
b.
improves the marginal seal of the restorationc. completely seals the dentinal tubules
d. is an effective thermal insulator
e. All of the above
60. A patient has sensitivity in a mandibular premolar. A well-condensed Class V
dental amalgam restoration was placed in the tooth five months
previously, with no discomfort for the first four months. Since then, it has
become painful. The problem probably relates to
a. marginal leakage
b. toothbrush abrasion
c. a fractured restoration
d.
irreversible pupal damage
61. The most common cause of fracture at the isthmus of class II dental
amalgam restoration is
a. delayed expansion
b. inadequate depth at the isthmus area
c.
inadequate width at the isthmus aread. moisture contamination of the amalgam during placement
62. The outline form of a cavity preparation is the
a.
shape or form of the preparation after carious
dentin has been excavated???????????
b. shape or form the preparation assumes after retention form has been
completed
c. shape or form of the preparation on the surface of the tooth
d. first step to be accomplished in cavity preparation after carious dentin has
been removed
e. next step to be accomplished in cavity preparation after resistance form
has been established
63. The amount of force needed to compact direct filling gold properly is
influenced most by the
a. angle of compaction
b.
surface area of the condenserc. bulk of the surrounding tooth
d. temperature at which the gold is annealed
64. Which of the following is a reason for sealing caries into the cavity?
a. to eliminate the need for eventual direct pulp
capping
b. to produce as aseptic field when pulp exposure is inevitable
c.
to allow the formation of secondary dentin before complete excavation
d. to produce a hard surface as a foundation for the sub sequent restoration
65. Adaptation of a matrix band to the gingival aspect of a class II dental
amalgam cavity preparation may be most difficult in which of the following
preparations?
a. A DO in a mandibular second molar
b. A DO in a mandibular second premolar
c. A DO in a maxillary first premolar
d.
A MO in a maxillary first premolare. A MO in a maxillary second premolar
66. The external shape of an initial Class V carious lesion in enamel is related to
the
a
. lines of Retzius??????????????????
b. contour of the gingiva
c. number of enamel tufts
d. enamel lamella in the lesion
67. During preparation for a cast gold restoration, the tooth tissue that is
weakened by the cavity preparation and subjected to damage by the
forces of mastication must be
a. reduced and covered by the cast restoration
b. strengthened by the use of cement or an amalgam core
c.
protected by restoring to full coverage of the toothd. beveled, and the patient reminded not to exert undue forces on the tooth
68. Different microstructure has been described for gold foil, mat gold and
granular or powered gold. It has been demonstrated at the microscopic
level that the....................
a. void spaces remain in any compacted gold
b. gold foil is more porous than any other form of gold
c. crystalline golds can be packed densely more readily than gold foil
d. proper compaction can remove all voids from commercially available
direct filling golds
69. Retention placed in a ClassV cavity prepared for direct filing gold should be
at
a.
occlusoaxial and gingivoaxial line anglesb. mesioaxial and distoaxial line angles
c. mesiogingival and distogingival line angles
d. axial line angles circumferentially
e. none of the above
70. Within an hour after cementation of cast gold restoration on an
unanesthetized tooth,
the patient complains of a shooting pain every time the teeth come together.
The most probable explanation is
a. supraocclussionof the restoration
b. an allergic reaction to components of the gold alloy
c. improper removal of cement from the onlay margins
d. a
galvanic current caused by the gold onlay occluding with a large
amalgam restoratione. none of the above
71. Marginal leakage related to temperature change occurs to the greatest extent
with
a.
amalgam alloyb. unfilled resin
c. composite resin
d. direct filling gold
72. Threaded pins used to retain amalgam should be placed
a.
b. parallel to each other and parallel to the long axis of the crown
c. so the edge of the pin channel is 0.02 mm. From the dentinoenamel
junction.
d. At 25,00 rpm to ensure that the pin reaches the full depth of the channel
e. None of the above
73. The treatment of choice for hypersensitive erosion areas is to
a. apply a sodium fluoride paste
b. [place a glass ionomer restoration]c. burnish sodium metaphosphate inot the dentin
d. apply an 8% solution of stannous fluoride
e.
treat the surface with orthophosphoric acid and apply resin[/COLOR
]74. Dental floss is applied to the distal bow of the clamp and allowed to extend
from the mouth so that the
a. dental floss may be used to stabilize the clamp if
necessary
b. clamp may be easily retrieved if it slips from the
clamp forceps or the tooth
c. clamp may be easily removed from the tooth
upon completion of the procedure
d. all of the above
75. The occlusal isthmus of an MO dental amalgam restoration is more resistant
to fracture if the
a. pulpal depth is 1mm
b. occlusal dovetail is present
c. axiopulpal line angle is roundedd. unsupported enamel at the gingivocavosurface margin is planed
76.Which of the following statements correctly describes the relationship
between marginal leakage of an amalgam restoration and age of the
restoration?
a. marginal leakage increases as the restoration ages
b. marginal leakage decreases as the restoration agesc. marginal leakage is severe throughout the life of the restoration
d. marginal leakage does not exist throughout the life of the restoration
77. Which of the following is a fundamental guideline that governs the outline
form of a class II cavity prepartion?
a. avoid angles in the proximal outline
b. extend the gingival margin beneath the free margin of the gingival
c. extend the margins until sound enamel is obtained within the cavity outline
d. include pits and fissures in the occlusal surface if the patient is very
susceptible to caries
78. When using the acid etch technique to restore a class IV fracture, exposed
dentin should first be covered with
a. cavity varnish
b. phosphoric acid
c. a calcium hydroxide linerd. zinc oxide-eugenol cement
79.In preparing a cavity for restoration with composite resin combined with an
acid etch technique, all enamel cavosurface angles should be
a. well rounded
b. right angles
c. acute angles
d. obtuse angles- i mean bevel
80. If the proximal box is too wide to allow facioaxial and linguoaxial grooves to
oppose one another, which of the following should be done?
a. cut grooves in the axial wall
b. cut retentive grooves deeper
c. use a pin or slots on the gingival floor
d. extend the preparation more on the occlusal surface
81. Threaded pins are used in large dental amalgam restorations to provide
a. retention formb. resistance form
c. occlusal stops for opposing teeth
d. much needed reinforcement of the
amalgam
82. Direct pulp capping is indicated when there is
a. a large exposure
b. pain response to cold
c. no hemorrhage from the exposure
d. an accidental mechanical exposure in clean, dry field
e. All of the above
83. The only area where cavosurface margins or wall junctions of an onlay cavity
are never beveled or planed is where the
a. pupal wall meets the axial wall
b. gingival bevel meets the proximal external planes
c. external planes of the proximal portion join the bevel of the occlusal
portion
d. none of the above
84. In diagnosing interproximal carious lesions (class II and class III) that cannot
be explored directly, a good supplement to the radiograph is
a. reviewing the patients history of caries activity
b. examining the corresponding tooth in the
occluding quadrant
c. examining for color changes or loss of
translucency beneath marginal ridgesd. preparing the adjacent occlusal surface and
examining the exposed proximal dentinoenamel
junction
85. A patient returns to the dentists office two days after p lacement of an MO
inlay in a maxillary premolar. His complaint that the tooth is sensitive to
chewing pressure indicates
a. a leaky margin
b. lack of occlusion
c. a need for occlusal adjustmentd. a need to replacethe inlay with alloy filling
86. Using the pick-up and delivery technique, which digits of the assistants hand
from the delivery portion?
a. all five fingers
b. the thumb and first two fingersc. the thumb and middle two fingers
d. the thumb and last two fingers
