2010 Released Qs And Ans47

Front 1

Bleeding gingiva and loosening of the
teeth may be associated with a deficiency
of
A. intrinsic factor.
B. folic acid.
C. niacin.
D. ascorbic acid.
E. riboflavin.

Back 1

D. ascorbic acid.

Front 2

Hypochromic anemia is associated with
A. iron deficiency.
B. aminopyrine therapy.
C. vitamin B12 deficiency.
D. folic acid deficiency.

Back 2

A. iron deficiency.

Front 3

Children receiving systemic fluoride will
exhibit the highest fluoride concentration
in the
A. enamel surface.
B. enamel matrix.
C. dentino-enamel junction.
D. cementum.

Back 3

D. cementum.

Front 4

The Fluorosis Index is used to measure the
A. degree of protection offered against
dental caries by fluoride
supplements.
B. concentration of fluoride in public
water supplies.
C. degree or severity of mottled enamel.
D. opposition to fluoridation by citizens'
groups.
E. total amount of fluoride ingested.

Back 4

C. degree or severity of mottled enamel.

Front 5

A characteristic of the periodontium which
allows safe temporary separation of the
teeth is the
A. nature of acellular cementum.
B. elasticity of bone.
C. modified continuous eruption of the
teeth.
D. passive eruption.

Back 5

B. elasticity of bone.

Front 6

Deposition of plaque on teeth occurs in
A. less than 24 hours.
B. 24 to 48 hours.
C. 2 to 4 days.
D. 5 to 7 days.

Back 6

A. less than 24 hours.

Front 7

Acquired pellicle
A. is composed of salivary
glycoproteins.
B. takes 24 hours to establish.
C. is difficult to remove.
D. causes inflammation

Back 7

A. is composed of salivary
glycoproteins

Front 8

Which microorganisms predominate in
early plaque?
A. Gram-positive aerobic rods.
B. Gram-negative aerobic rods.
C. Gram-positive aerobic cocci.
D. Gram-negative aerobic cocci.
E. Gram-positive anaerobic cocci.

Back 8

C. Gram-positive aerobic cocci.

Front 9

A patient complains of dull, constant pain
in his jaws upon awakening. You would
suspect
A. acute pulpitis.
B. sinusitis.
C. bruxism.
D. chronic gingivitis.

Back 9

C. bruxism.

Front 10

Areas of isolated gingival recession are
most frequently seen on teeth that are
A. non vital.
B. moderately mobile.
C. ankylosed.
D. labially prominent in the arch

Back 10

D. labially prominent in the arch

Front 11

A furcation invasion in which bone loss
allows the probe to extend completely
through the furcation is classified as
A. incipient.
B. Class I.
C. Class II.
D. Class III.
E. chronic.

Back 11

D. Class III.

Front 12

Destruction of bone in periodontal disease
occurs
A. continuously.
B. in cycles lasting for about 3~months.
C. in random cycles.
D. None of the above.

Back 12

C. in random cycles.

Front 13

Following periodontal surgery, the most
important factor to promote healing is
A. a salt water rinse.
B. thorough plaque control.
C. gingival massage.
D. leaving the site undisturbed for a
period of 3 months.

Back 13

B. thorough plaque control.

Front 14

In the oral cavity, decalcification of the
enamel occurs only through
A. proteolytic enzymes.
B. loss of calcium.
C. sulfuric acid.
D. hyaluronidase.

Back 14

B. loss of calcium.

Front 15

The primary reason for placing a surgical
dressing after a gingivectomy is to
A. prevent hemorrhage.
B. protect the wound.
C. stabilize the teeth.
D. protect the sutures

Back 15

B. protect the wound.

Front 16

Examination reveals an area of gingival
recession that exposes a wide area of
denuded root. The procedure of choice to
obtain coverage of this root surface is
A. free gingival autograft.
B. apically positioned flap.
C. laterally positioned pedicle graft.
D. coronally positioned flap.

Back 16

C. laterally positioned pedicle graft.

Front 17

Which of the following is essential for
successful periodontal treatment?
A. Scaling.
B. Final evaluation and maintenance on
a one-year recall.
C. Periodontal surgery.
D. Elimination of local etiologic factors
through plaque control.

Back 17

D. Elimination of local etiologic factors
through plaque control.

Front 18

Following periodontal surgery, the most
common cause of recurrence of pockets is
A. systemic disease.
B. traumatic occlusion.
C. failure to splint.
D. poor oral hygiene

Back 18

D. poor oral hygiene

Front 19

The efficacy of pit and fissure sealants is
affected by
A. occlusal relationship.
B. opacity of the sealant.
C. stage of tooth eruption.
D. type of polymerization reaction.
E. systemic fluoride treatment.

Back 19

C. stage of tooth eruption.

Front 20

A radiographic term used to describe the
dense bone image of the socket and septal
crest is
A. periodontal ligament space.
B. cancellous bone.
C. cribriform plate.
D. lamina dura.
E. cortical bone

Back 20

D. lamina dura.

Front 21

In health, the level of the interproximal
alveolar crest is related to the
A. thickness of the alveolar process.
B. location of the gingival margin.
C. amount of underlying trabecular
bone.
D. position of the cemento-enamel
junction.

Back 21

D. position of the cemento-enamel
junction.

Front 22

The predominant types of inflammatory
cells present in CHRONIC gingivitis are
A. polymorphonuclear leukocytes.
B. monocytes and polymorphonuclear
leukocytes.
C. lymphocytes and plasma cells.
D. eosinophils.
E. mast cells.

Back 22

C. lymphocytes and plasma cells.

Front 23

Narrow ‘slit-like” areas of gingival
recession over the roots of teeth are called
A. festoons
B. clefts.
C. craters.
D. fenestrations.
E. dehiscences.

Back 23

B. clefts.

Front 24

Vitamin D is a factor in
A. caries susceptibility.
B. calculus formation.
C. calcium absorption.
D. repair of hypoplastic defects of the
enamel.

Back 24

C. calcium absorption.

Front 25

The tooth surfaces LEAST susceptible to
caries are
A. mesial of the maxillary arch.
B. lingual of the mandibular arch.
C. distal of the maxillary arch.
D. occlusal of the mandibular arch.
E. lingual of the maxillary arch.

Back 25

B. lingual of the mandibular arch.

Front 26

In normal gingiva, the predominant
microflora of gingival plaque are
A. gram-positive cocci.
B. gram-negative cocci.
C. gram-negative facultative and
anaerobic rods.
D. spirochetes

Back 26

A. gram-positive cocci.

Front 27

In clinically normal gingiva, the distance
between the bottom of the sulcus and the
alveolar crest is
A. 0.5-1mm.
B. 1.5-2mm.
C. 3-5mm.
D. None of the above.

Back 27

A. 0.5-1mm.

Front 28

Which of the following drugs is most
effective against candidiasis?
A. Nystatin.
B. Neomycin.
C. Bacitracin.
D. Polymyxin B.

Back 28

A. Nystatin.

Front 29

The physiologic wear of hard dental tissue
resulting from mastication is known as
A. decalcification.
B. attrition.
C. abrasion.
D. erosion.

Back 29

B. attrition.

Front 30

Which of the following conditions may
result from cross-brushing the teeth?
A. Erosion.
B. Abrasion
C. Attrition.
D. Hypoplasia.

Back 30

B. Abrasion

Front 31

The most common complaint of a patient
with chronic marginal gingivitis is
A. bleeding on brushing.
B. painful gums.
C. changes in the shape of the gingiva.
D. bad breath.

Back 31

C. changes in the shape of the gingiva.

Front 32

The most important diagnostic element in
assessing the periodontal status of a
patient is
A. the results of vitality testing.
B. the radiographic appearance.
C. the depth of periodontal pockets.
D. the mobility of the teeth.

Back 32

C. the depth of periodontal pockets.

Front 33

In patients with periodontal disease, which
of the following is most directly
responsible for tooth loss?
A. Resorption of root surfaces.
B. Gingival inflammation.
C. Destruction of supporting alveolar
bone.
D. Inflammation and thickening of the
periodontal ligament.
E. Necrosis of exposed cementum.

Back 33

C. Destruction of supporting alveolar
bone.

Front 34

Chronic gingival inflammation is best
eliminated by
A. gingival surgery.
B. regular use of a water-irrigating
device.
C. root planing and curettage.
D. occlusal correction.
E. splinting.

Back 34

B. regular use of a water-irrigating
device

Front 35

The primary objective of initial
periodontal therapy is to
A. reduce occlusal trauma.
B. make adequate dietary and
nutritional adjustments.
C. remove the colonized masses of
microorganisms and calculus.
D. eliminate crowded and tilted teeth.

Back 35

C. remove the colonized masses of
microorganisms and calculus.

Front 36

Successful repair of bony defects is
dependent upon
A. its depth.
B. the number of walls.
C. the distance between the buccal and
lingual walls.
D. the distance from the crest of the
defect to the cemento-enamel
junction.

Back 36

B. the number of walls.

Front 37

Residual soft tissue interdental craters not
associated with underlying bony changes
are eliminated by
A. root planing.
B. subgingival curettage.
C. flap operation.
D. gingivoplasty.
E. None of the above.

Back 37

D. gingivoplasty.

Front 38

In mandibular distal extension free-end
saddle removable partial dentures,
periodontal damage to the abutment teeth
can best be avoided by
A. maintaining tissue support in the
saddle areas.
B. clasping at least two teeth.
C. maintaining the clasp arms on all
abutment teeth.
D. using bar type clasps.

Back 38

A. maintaining tissue support in the
saddle areas.

Front 39

In taking an impression with polysulfide
or silicone materials, if the heavy bodied
tray material begins to set before seating,
the resultant die will
A. not be affected dimensionally.
B. be overall smaller.
C. be overall larger.
D. develop a rough surface texture.
E. develop bubbles at the interface of
the syringe and tray material.

Back 39

B. be overall smaller.

Front 40

Hydrocolloid impression materials must
be poured immediately because they
A. adhere to plaster and stone if not
poured immediately.
B. are subject to syneresis and
inbibition.
C. lose strength and disintegrate if left
unpoured.
D. begin to swell immediately after
removal from the mouth.

Back 40

B. are subject to syneresis and
inbibition.

Front 41

In soldering nickel-cobalt-chromium
alloys and stainless steel, the function of
the fluoride flux is
A. to lower the melting range of the
solder.
B. to reduce the copper-oxide content of
the alloy.
C. to stop the flow of the molten solder
onto undesired areas.
D. to reduce the formation of chromium
oxide during soldering.

Back 41

D. to reduce the formation of chromium
oxide during soldering.

Front 42

Dental stone casts reach their maximum
strength after
A. l hour.
B. 5 hours.
C. 10 hours.
D. 24 hours.

Back 42

D. 24 hours.

Front 43

A "broken stress" or "non-rigid" type fixed
prosthesis is indicated when
A. the retainers can be so designed as to
have equal retentive qualities.
B. 2 or 3 teeth are to be replaced.
C. constructing a mandibular fixed
prosthesis.
D. the abutments cannot be prepared in
parallel without excessive removal of
tooth structure.

Back 43

D. the abutments cannot be prepared in
parallel without excessive removal of
tooth structure.

Front 44

The vertical relation of rest is
A. the same as the vertical relation of
occlusion.
B. greater than the vertical relation of
occlusion.
C. less than the vertical relation of
occlusion.
D. the same as the interocclusal
distance.

Back 44

B. greater than the vertical relation of
occlusion.

Front 45

The lesion most frequently associated with
an ill-fitting denture flange is
A. stomatitis.
B. lichen planus.
C. epulis fissuratum.
D. angular cheilosis.

Back 45

C. epulis fissuratum.

Front 46

The vertical dimension of occlusion
between the maxillary and mandibular
teeth is the
A. relationship of the occlusal plane to
the Frankfort plane.
B. relationship of the mandible to the
maxilla "at rest".
C. relationship of the mandible to the
maxilla with the teeth together.
D. most comfortable unstrained
relationship of the mandible to the
maxilla.

Back 46

C. relationship of the mandible to the
maxilla with the teeth together

Front 47

Clasps should be so designed that upon
insertion or removal of a partial denture,
the reciprocal arms contact the abutment
teeth when the retentive arms pass over
the height of contour in order to
A. prevent distortion of the clasps.
B. assure complete seating of the
framework.
C. provide needed support to abutment
teeth during a period of added stress.
D. permit insertion and removal without
applying excessive force.

Back 47

C. provide needed support to abutment
teeth during a period of added stress

Front 48

The line drawn through the occlusal rests
of two principal abutments is
A. survey line.
B. terminal line.
C. axis of rotation.
D. line of greatest torque.

Back 48

C. axis of rotation.

Front 49

In constructing a full gold crown,
recession of the gingival tissue can be
most effectively prevented by
A. narrowing the food table.
B. accurately reproducing the tooth
form.
C. slightly overcontouring the tooth
form.
D. extending the margins of the crown
1mm into the gingival crevice.

Back 49

B. accurately reproducing the tooth
form.

Front 50

A patient wearing complete dentures has
angular cheilosis. The most likely cause is
A. increased vertical dimension.
B. insufficient horizontal overlap
(overjet).
C. decreased vertical dimension.
D. excessive vertical overlap (overbite).

Back 50

C. decreased vertical dimension.