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Fixed Prostodontics > Lab Quizzes > Flashcards

Lab Quizzes Flashcards

1
Q
  1. What is the ideal Total Occlusal Convergence angle for a posterior tooth preparation?
A

a. 6-10

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2
Q
  1. What is the occlusal clearance required on the functional cusp in a complete metal crown preparation?
A

a. 1.5mm

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3
Q
  1. The ratio of the occlusocervical/incisocervical dimension to the faciolingual dimension (OC/IC:FL) should be
A

a. 0.4

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4
Q
  1. Which margin design is well suited for complete metal crown?
A

a. Chamfer

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5
Q
  1. Whats the minimum occlusocervical height for a molar preparation?
A

a. 4mm

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6
Q
  1. Which of the following is NOT a bio-mechanical requirement for an interim restoration?
A

a. Taper

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7
Q
  1. Which of the following maintain positional stability of an interim restoration?
A

a. All of the above

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8
Q
  1. How should the emergence profile of the interim restoration look like?
A

a. Slightly concave

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9
Q
  1. When should a prefabricated crown be used as a provisional restoration?
A

a. Single crowns

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10
Q
  1. Which of the following activates the polymerization of polymer resins?
A

a. Camphorquinone

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11
Q
  1. What is the volumetric shrinkage of PMMA?
A

a. 8%

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12
Q
  1. Benzoyl Peroxide decomposes to free radical by which of the following processes?
A

a. Option A and B

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13
Q
  1. Which process occurs from reaction with eugenol and oxygen?
A

a. Termination

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14
Q
  1. How much of incisal reduction is required for a metal ceramic restoration?
A

a. 2-2.5mm

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15
Q
  1. What is the width and type of the facial margin for an anterior MCC?
A

a. Shoulder 1.2mm

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16
Q
  1. What is the width and type of the lingual/palatal margin for #8 MCC?
A

a. Chamfer 0.5mm

17
Q
  1. The high coefficient of thermal expansion and release of residual stresses in a wax pattern can cause distortion, resulting in an inaccurate casting. Which of the following is useful in overcoming this problem?
    a. Complete evaporation of the wax components during wax application
    b. Investment soon after completion of wax pattern
    c. Storage of the wax pattern at an ambient temperature below 40oF
    d. Placement of the wax pattern in 100oF water bath for 30 minutes before investing
A

b. Investment soon after completion of wax pattern

18
Q
  1. Quartz, cristobalite and tridymite function in dental casting investments as:
    a. Refractory components
    b. Binders
    c. Modifiers
A

a. Refractory components

19
Q
  1. When casting type III gold alloys (≤1200oF), which type of dental investment is used?
    a. Phosphate- bonded investment
    b. Gypsum- bonded investment
    c. Silica- bonded investment
    d. Non of the above
A

b. Gypsum- bonded investment

20
Q
  1. The types of expansion with which a gypsum-bonded investment may be involved are:
    a. Setting expansion
    b. Hygroscopic expansion
    c. Thermal expansion
    d. All of the above
A

d. All of the above

21
Q
  1. The ratio of water to powder for Type IV stone should be weighed / measured as recommended by the manufacturer, and is approximately:
    a. 20 cc / 100g
    b. 30 cc / 100 g
    c. 40 cc / 100 g
    d. 50 cc / 100g
A

a. 20 cc / 100g

22
Q
  1. The internal surface of a type III gold casting is best prepared for cementation by:
    a. Acid etching
    b. Roughening the surface with a carbide bur
    c. Air abrasion (sandblast) with 50 micron alumina
    d. Thorough washing and drying
    e. Both C and D
A

e. Both C and D

23
Q
  1. In a clinical setting, if you were trying in #4 lithium disilicate crown, which of the following would you check first?
    a. Occlusion
    b. Internal fit
    c. Proximal fit
    d. Marginal integrity
A

c. Proximal fit

24
Q
  1. Which of the following would you adjust after fit checking a glass ceramic restoration?
    a. Intaglio of the crown only
    b. The tooth only
    c. Both of the above
    d. None of the above
A

b. The tooth only

25
Q
  1. RMGI cement can be used to cement all of the following restorations EXCEPT?
    a. Full Gold Crown
    b. Porcelain fused to metal
    c. Zirconia
    d. Lithium Disilicate
A

d. Lithium Disilicate

26
Q
  1. Proximal contacts of a crown can be checked by using which of the following materials?
    a. Shim stock
    b. Accuflim articulating paper
    c. Occlude spray
    d. All of the above
    e. Non of the above
A

d. All of the above

27
Q
  1. Which of the following situations can lead to an open margin?
    a. Heavy proximal contact
    b. Internal binding of the crown
    c. Both A and B
    d. Both A and B along with heavy occlusal contacts
A

c. Both A and B

28
Q

Which of following characteristics is NOT -

A

short working type

29
Q

Question about vinyl polysiloxane

A
30
Q

How much space between tray -

A

2-3mm

31
Q

Characteristic of custom tray -

A

all of the above

32
Q

Purpose of making preliminary impression -

A

all of the above

Fixed Prostodontics (19 decks)

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