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Random MCQS Must Do > Date: 21st December 2024 > Flashcards

Date: 21st December 2024 Flashcards

1
Q

WHat is the primary stress bearing area in the mandibular arch due to the factors mentioned, except for which one?
A. Location is buccal to crest of ridge
B. Almost horizontal location
C. Presence of underlying compact bone
D. Buccinator fibres are parallel to denture borders

A

D

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2
Q

Which factor does not contribute to the crest of max residual ridge being a 1’ stress bearing area:
A. Keratinized epithelium
B. Underlying bone
C. Fibrous connective tissue
D. Glandular tissue in submucosa

A

D

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3
Q

Which muscle mainly composes the ant. Portion of the soft palate known as the palatine aponeurosis?
A. Palatopharyngeus
B. Muscle uvulae
C. Tensor palatini
D. Levator palatini

A

C

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4
Q

What does the teeth arrangement in the neutral zone primarily enhance?
A. Occlusion of denture
B. Retention of denture
C. Stability of denture
D. Support of denture

A

C

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5
Q

TO enhance the support of a denture, what area of mand. Denture should cover the retromolar pad?

A

Ant 2/3

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6
Q

What is the emergency retentive force in a CD primarily die to ?
A. Oral and facial musculature
B. Atmospheric pressure
C> surface Tension
D. Capillarity

A

b

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7
Q

In which psychological attitude of a pt. Is the immediate denture t/m contraI?
A. Skeptical
B. Indifferent
C> Philosophic
D. Critical

A

B

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8
Q

What causes Denture sore Mouth?
A. Allergy to DM
B. Dentures
C. Infection with candida albicans
D. Underlying Hormonal deificiency
E. All

A

E

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9
Q

What is the disADv of Immediate denture?

A

CO-operation from pt. Is required
Increased cost
No try in// cannot gurantee aesthetics

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10
Q

B?

A

B. Incisive papilla

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11
Q

WHat is the purpose of making a record of protrusive relatio and what funtion does it serve after it is made?

A

To register the condylar path and to adjust condylar guides of the articulator so that they are equivalent to the condylar paths of the patient

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12
Q

The main factor controlling a decision to increase the occlusal height of teeth forextensive oral reconstruction is whether
A. The inter occlusal distance will be physiologically acceptable after treatment
tB. There will be sufficient tooth bulk in the abutment teeth for proper retention of the crowns
C. At least two third of the original alveolar process will remain for adequate periodontalsupport
D. The aesthetic appearance of the patient will improve sufficiently to warrant the plannedreconstruction

A

A

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13
Q
A
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14
Q

The main factor controlling a decision to increase the occlusal height of teeth forextensive oral reconstruction is whether
A. The inter occlusal distance will be physiologically acceptable after treatment

B. There will be sufficient tooth bulk in the abutment teeth for proper retention of the crowns

C. At least two third of the original alveolar process will remain for adequate periodontalsupport

D. The aesthetic appearance of the patient will improve sufficiently to warrant the plannedreconstruction

A

a

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15
Q

In planning and construction of a cast metal partial denture the study cast

A. facilitate the construction of custom/special trays

B. minimize the need for articulating

C. provide only limited information about inter ridge distance, which is best assessed clinically

D. can be used as a working cast when duplicating facilities are not available

A

A

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15
Q

Periodontal damage to abutment teeth of partial denture with distal extension canbest be avoided by

A. Applying Stressbreakers

B. Employing bar clasps on all abutment teeth

C. Maintaining tissue support of the distal extension

D. Clasping at least two teeth for each edentulous area

E. Maintaining the clasp arms on all abutment teeth at the ideal degree of tension

A

A

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16
Q

Which of these muscles may affect the borders of mand. CD?
A. mentalis
B. Lateral Pterygoid
C. Oribicularis ORis
D. Levator ANgulioris
E. temporal

A

A

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17
Q

Following extraction of the molar teeth**
A. The ridge height is lost more from the maxilla than from the mandible
B. The maxillary ridge will get more bone lost from the palatal aspect than the buccal
C. The mandibular arch is relatively narrower than the maxillary arch
D. Compared with the pre-resorption state, the mandibular ridge will lose more bone from the
lingual aspect than the buccal one.

A

D

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17
Q

Which of the following is a major disadvantage to immediate complete denture
therapy
A. Trauma to extraction site
B. Increased the potential of infection
C. Impossibility for anterior try in
D. Excessive resorption of residual ridge

A

C

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18
Q

What is the main purpose of using Stress breakers
A. To distribute the load between teeth and ridges
B. To distribute the load between the clasps and the face end of the saddle
C. It relieves the abutment tooth of occlusal loads that may exceed their physiologic strength

A

a

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19
Q

When repairing a fracture of lower complete denture. Which statement is correct:
A. Self curing will distort the denture
B. Cold curing will not be strong enough because of small area of attachment
C. There is a possibility of occlusal disharmony

A

C

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19
Q

The setting expansion of casting investment is approximately
A. 0 to 0.1%
B. 0.1 to 0.5%
C. 0.5 to 1%
D. 1.1 to 1.6%

A

C

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20
Q

The un-polymerized monomer in Self-cured resin is approximately:**
A. 0.5%
B. 2.5%
C. 5%
D. 10%

A

A

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21
Q

Oil or water on impression for treatment casts causes
A. An increase of the quality
B. No alteration
C. A decrease of the quality
D. Bubbles on the cast
E. None of the above

A

D

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21
Q

A volume shrinkage of methyl meta cyrelate monomer when is polymerized:**
A. 12%
B. 15%
C. 18%
D. 21%

A

D

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22
Q

What is Path of Insertion
A. The movement of the appliance from the points of initial contacts to path of final rest
position
B. The movement of the appliance from the points of rest position until it is not in contact
with teeth

A

A

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23
Q

What is Path of Removal
A. The appliances movement from the rest position to the last contacts of its rigid parts with
the supporting teeth
B. The movement of the appliance from the points of initial contacts to path of final rest
position

A

A

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24
Q

Which of the following arrears CAN NOT be determined by survey analysis of
partially edentulous cast
A. Areas to be revealed as blocked out to properly loca?? Rigid parts of a frame work
B. Areas to be shaped to properly loc?? Rigid parts of framework
C. Areas used for guideline planes
D. Areas used for retention
E. Areas used for support
F. Depth of rest seats

A

F

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25
Q

In partial dentures the guidelines “Guiding Planes” serve to
A. Aids in balancing occlusion
B. Assure predictable clasp retention
C. Form right angle with the occlusal plane
D. Eliminate the necessity for precision attachment
E. Eliminate the necessity for a posterior clasp

A

B

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26
Q

The first thing to check when patient comes complaining of pain under denture is:
A. Occlusion
B. Soft tissues changes

A

A

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27
Q

Modulus of elasticity is defined as
A. The stress at the proportional limit
B. The stress-strain ratio within the proportional limit

A

B

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28
Q

The position of cusps of maxillary first premolar during setting of teeth and on
occlusal view is positioned**
A. Distally
B. Mesially
C. Central buccolingually

A

B

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29
Q

Kinematic face bow is used for recording to locate?

A

Hinge movement axis

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30
Q

Why do you polish teeth and base before seating partial dentures?
a. to smooth the rough surface
b. to minimize the retention of plaque
C. to increase the adaptability of occlusal rests

A

B

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31
Q

Wax patterns are not to be left on the bench for ling time because of
A. DIstortion
B. loss of elasticity

A

A

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32
Q

Gold clasp is more elastic than CO-Cr, but Co-Cr has a high modulus of elasticity
a. 1st statement true, 2nd false
b. Both true
C. first false, second true
D. both false

A

B

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33
Q

Overdentures are best used for ?
A. canines and pms
B. molars
C. incisors

A

A

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34
Q

Retentive part of the clasp position is
A. below the survey line
B. Above the survey line
C. as close as possible to the gingival margins

A

A

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35
Q

To increase the stability of the lower denture:
a. occlusal plane should be below the tongue
b. occlusal plane should be above the tongue
c. lingual flanges should be concave

A

A

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36
Q

What is the disAdv of gypsum dyes?
a. weak edge strength and lack of surface details
b. dimensional inaccuracy

A

a (find out and check online)

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37
Q

A patient presents with a complete lower denture and reports persistent paresthesia of the lower lip. Considering the anatomical structures involved, clinical implications, and potential iatrogenic factors, what is the most likely underlying cause of this sensation, and how might it be related to the fitting or positioning of the denture?
a. pressure onmental foramen
b. pressure on genioglossi mylohyoid muscles

A

a

38
Q

When describing a removable partial denture, the minor connector refers to**
A. Rigid components anterior to the premolar teeth
B. Flexible components, in contrast to rigid major connectors
C. Smaller connectors which connect denture components to the major connector
D. The components of the denture base which provides reciprocation

A

C

39
Q

The means by which one part of a partial denture framework opposes the action of
the retainer in faction is**
A. Tripoding
B. Reciprocation
C. Stress breaking
D. Indirect retention

A

B

40
Q

In removable partial denture, the principle of an indirect retainer is that
A. Stabilise against lateral movement
B. Prevent settling of major connectors
C. Restrict tissue movement at the distal extension base of the partial denture
D. Minimise movement of the base away from the supporting tissue

A

D

40
Q

Distortion or change in shape of a cast partial denture clasp during its clinical use
probably indicates that the
A. Ductility was too low
B. Hardness was too great
C. Ultimate tensile strength was too low
D. Tension temperature was too high
E. Elastic limit was exceeded

A

E

41
Q

Which of the following is true regarding preparation of custom tray for elastomeric
impression
A. Adhesive is preferred over perforation
B. Perforation provides adequate retention
C. Adhesive is applied immediately before procedure
D. Perforations are not made in the area over the prepared tooth

A

A

42
Q

When a removable partial denture is terminally seated ; the retentive clasps tips
should
A. Apply retentive force into the body of the teeth
B. Exert no force
C. Be invisible
D. Resist torque through the long axis of the teeth

A

B

43
Q

Why do you construct a lower removable partial denture with lingual bar
A. It is used when the space between raised floor, mouth and gingival margin is minimal
B. Plaque accumulation is less than lingual plate
C. Should be make thicker when short

A

B

44
Q

The Fovea Palatinae are
A. Foramina covering the lesser palatine nerves and vessels
B. Morphologically related to the formation of the premaxilla
C. Located on either sides of the midline close to the junction of the hard and soft palate
D. Closely related to the rugae of the palate

A

C

45
Q

Which one of following statement about Overdenture is not correct
A. Greater occlusal loads can be applied by the patient
B. Retention and stability are generally better than with conventional complete denture
C. Alveolar bone resorption is reduced
D. The retained roots are covered by the denture thus protecting them from caries and
periodontal diseases

A

D

46
Q

Which of the following is a major disadvantage to immediate complete denture
therapy
A. Trauma to extraction site
B. Increased the potential of infection
C. Impossibility for anterior try in
D. Excessive resorption of residual ridge

A

C

47
Q

Rank the following impressions materials according to their flexibility
A. Alginate> Polysulphide> Silicone> Zinc Oxide Eugenol
B. Silicone> Alginate> Polysulphide> Zinc Oxide Eugenol
C. Alginate> Polysulphide> Zinc Oxide Eugenol>Silicone
D. Alginate> Silicone> Polysulfide> Zinc Oxide Eugenol
E. Alginate> Zinc Oxide Eugenol> Silicone> Polysulphide

A

B

47
Q

Denture resin are usually available as powder and liquid that are mixed to form
a plastic dough; the powder is referred to as,**
A. Initiator
B. Polymer
C. Inhibitor
D. Monomer
E. Dimer

A

B

48
Q

When all other removable partial denture consideration remains unchanged; clasps
constructed of which material can be engage the deepest under cut
A. Chrome cobalt casts
B. Nickel chrome casts
C. Wrought stainless steel
D. Wrought gold

A

D (FIND OUT AND CHECK)

49
Q

Which one of the following types of pain is most likely to be associated with cranio
mandibular disorders
A. Exacerbated pain by hot or cold food
B. Keeps patient awake at night
C. Associated with muscle tenderness
D. Associated with trigger spots related to the trigeminal nerve

A

C

50
Q

The incisal guidance on the articulator is the**
A. Mechanical equivalent of horizontal and vertical overlap of upper and lower incisors
B. Mechanical equivalent at the compensating curve
C. Same as condylar guidance
D. Estimated by the equation: Incisal guidance = 1/8 of condylar Guidance

A

A

50
Q

What controls the occlusion:**?? Check Boucher C.D.
A. Teeth
B. Receptors in periodontal membrane
C. Proprioceptors
D. Neuromuscular receptors
E. TMJ
F.
All of the above

A

F

50
Q

Where is the retentive position on tooth according to the survey line:
A. Below the height of contour
B. Next to gingival margins

A

A

51
Q

What are the most common errors when constructing partial denture:
A. Improper survey
B. Bad positioning of the occlusal rests
C. Incorrect design

A

C

52
Q

Which impression material should NOT be kept in water within on hour: “in
another paper was: 30 mins before pouring”
A. Polyether
B. Condensation silicone
C. Polyvinyl silicone

A

B

53
Q

Porosity in acrylic dentures is caused by
A. Contraction porosity in thickest point of the denture
B. Insufficient pressure during flasking causes it

A

B

54
Q

What is TRUE about vertical dimension
A. Does not change for the whole life
B. Decreases when head is tilted back
C. Increases when a lower denture is placed in mouth

A

FIND OUT (PROBABLY A)

55
Q

In the construction of an RPD, guiding planes are created by
A. Perpendicular to the occlusal plane
B. Parallel side towards the path of placement.

A

B

56
Q

When should pour polyether impression materials
A. Within 24 hours after taking impression
B. Within 30 minutes after taking impression
C. Should be stored dry and then poured
D. Should be stored in humid place

A

C

57
Q

A gingivally extended chrome cobalt cast clasp
A. Can extend 0.5 under the surveyor line
B. Can extend 0.25 under the surveyor line
C. Will resist deforming forces better compared to cast gold

A

C

58
Q
A
58
Q

The first molars are extracted in both arches
A. The bone resorption will be the same for both arches
B. Resorption is more on the palatal side of maxillary molars
C. Resorption is more on lingual side of mandibular molars
D. The ridge height resorbs more in maxilla than mandible

A

C

59
Q

The use of nickel chromium in base plate should be judiciously considered because
A. A significant number of females are allergic to nickel
B. A significant number of female are allergic to chromium
C. A significant number of males are allergic to nickel

A

A

60
Q

Where would you expect to find the Mylohyoid in relation to periphery of
complete denture:
A. Mandibular buccal in the midline
B. Mandibular lingual in the midline
C. Mandibular disto buccal area

A

B

61
Q

What is the relationship of the retentive portion of the partial dentures retainers
to the survey line of abutment:
A. Gingival /Below/
B. Occlusal /Above/
C. No relation

A

A

62
Q

Which of the following liquids is not suitable for prolonged immersion of cobalt
chrome partial dentures:
A. Alkaline peroxidase
B. Hypochlorite solutions
C. Soap solutions
D. Water

A

B

63
Q

Dentures hyperplasia is generally attributed to:
A. Poor oral hygiene
B. Denture movement

A

A

64
Q

In complete dentures, cheek biting is most likely a result of:
A. Reduced Overjet of posterior
B. Increased vertical dimension
C. Teeth have large cusp inclines

A

A

65
Q

Resting face height in edentulous patients:
A. Decreases when head is tilted back
B. Increases when lower denture is inserted
C. Does not change over time

A

C

66
Q

Ala-Tragal line is:**
A. The line running from the tragus of the nose to ala of the ear
B. A guide used to orient the occlusal plane
C. Parallel to Frankfurt horizontal plane
D. A guide to the occluding face height in complete denture.

A

B

67
Q

It is desirable to major connectors of upper partial dentures to:**
A. At least 5 mm away from the gingival margin
B. Cover the anterior palate

A

B

68
Q

n full dentures porosity in the most thickest area is due to:**
A. Gaseous porosity
B. Shrinkage porosity

A

B

69
Q

Terminal Hinge Axis can be obtained by:
A. Face bow
B. Kinematic face bow
C. Articulator

A

B

70
Q

Compared to dental plaster all die stones:
A. Require less gauging water
B. Require more gauging water
C. Require the same quantity of gauging water
D. Are beta-hemihydrate
E. None of the above

A

A

71
Q

The MOST effective manner to produce a hard surface on a cast is by:
A. Employ as much water as possible on mixing
B. Employ as little water as possible on mixing
C. Adding 2% of borax to the mix
D. Adding calcium tetraborate
E. None of the above

A

B

72
Q

Fusion temperature of impression compound should occur:
A. Below mouth temperature
B. Above mouth temperature
C. As of the skin temperature
D. At the room temperature
E. None of the above

A

B

73
Q

The flow of the following percentage is allowable for impression compound
(type I) at the oral temp of 37º
A. 6%
B. 10%
C. 2%
D. 20%
E. None of the above

A

A

74
Q

The disadvantage of heating the impression compound in a water bath is:
A. It may become brittle
B. It may become grainy
C. Lower moles with constituents are leached out
D. The plasticity of the compound may be altered
E. All of the above

A

E

75
Q

Dental Impression materials are hydrocolloids of:
a. emulsion type
b. suspension type
c. sol type
d. gel type
e. none of above

A

a

76
Q

elastomers are :
a. hydrophilic
b. hydrophobic
c. water-loving IM
d. Potassium alginates
e. none of above

A

B

77
Q

elastic properties of rubber impression materials :
a. improves with time
b. deteriorates with time
c. deteriorates when exposed to temperature
d. none of the above

A

a

78
Q

The effect of temperature rising above 100’ C on heat cured denture base acrylic resins is:

a. produces porosity on the external portion of the resin
b. produces porosity on the internal portion of the resin
c. produces porosity on the surface of the resin
d. prevents porosity on the interior of the resin

A

B

79
Q

Initiation of curing process in self cure acrylic resin is achieved by:

A

benzoyl peroxide

80
Q

outcome of rapid wax burn out is:
a. cracking of investment
b. back pressure porosity

A

a

81
Q

an obturator in cleft plate is maintained by:
a. cohesion
b. atmospheric pressure
c. retention in the defect
d. patient support it with the tongue

A

c

82
Q

Flexibility of retentive clasp arm depends on:
a. length
b. cross section
c. material
d. degree of taper
e. all of the above

A

e

83
Q

Why are 3 tripods marked on a cast being surveyed:
a. orient cast to articulator
b. oreint cast to surveyor
c. provide guide planes

A

b

83
Q

in regards to connectors on dentures; whichof the following is correct:
a. MC should be rigid
b. minC should engage undercuts

A

a

84
Q

what interferes with maxillary denture in posterior vestibular fold:
a. condyle
b. coronoid process
c. masseter muscle

A

b

85
Q

in regard to shade, chroma is:
a. brightness
b. saturation of hue
c. value

A

b

86
Q

How long should acrylic self cure special trays been made prior to taking impression:
a. 12 hrs
b. immediately after fabricating it
c. after been left in water for an hour

A

c

87
Q

the main cause of gingivitis in partial denture patient is:
a. placement of dentures
b. plaque accumulation

A

b

88
Q

what is the neutral zone?
a. zone where displacing forces are neutral
b. zone where buccal and lingual forces are imbalanced

A

b

89
Q

Flexibility of the clasp does not relate to :
a. length
b. cross section
c. material
d. degree of taper
e undercut

A

e

89
Q

WHat is the bilaminar zone

A

FIND OUT

90
Q

The optimum crown to root ratio for abutment tooth is:
a.2:3
b. 1:2
c. 1:1
d. 3:2

A

a

91
Q
A

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