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Fixed Pros 2020 > Intro to fix prosthodontics > Flashcards

Intro to fix prosthodontics Flashcards

1
Q

What is the collective term for preventive measures and foundation procedures that are needed before definitive prosthodontic care can be provided?

A

-Mouth preparation

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2
Q

Mouth preparation often involves reorganization of the patient’s occlusion, typically to make _________ _________ coincident with ______ _______ and remove eccentric interferences.

A
  • Maximum intercuspation

- Centric relation

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3
Q

T/F CO = CR is done sometimes as a prerequisite to extensive restorative treatment

A

True

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4
Q

Where do fractured teeth most commonly occur?

A

-Base of existing fillings

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5
Q

What are two clinical tests to check for fractured teeth?

A
  • Cold sensitivity

- Pressure sensitivity

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6
Q 
Place in order from 1 to 4 in prosthodontic sequencing.
Muscles
Anterior teeth
Joints
Posterior teeth
A

1) Joints
2) Muscles
3) Anterior teeth
4) Posterior teeth

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7
Q

What are five foundation materials?

A
  • Amalgam
  • Composite resin
  • Glass Ionomer
  • Resin modified glass ionomer
  • Zinc phosphate
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8
Q

What is the best all -around material for foundation materials for fix pros?

A

-Composite resin core material

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9
Q

T/F For build up materials you do not want to use dual cure material

A

False

-You want to use dual cure material for build up material

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10
Q

What are the three major principles of tooth preparation?

A
  • Biologic
  • Mechanical
  • Esthetic
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11
Q

What is the margin gap with milled zirconia restorations?

A

-40 um

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12
Q

What is an advantage of a chamfer margin design?

A
  • Distinct margin
  • ‘Adequate bulk
  • Easier to control
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13
Q

What are the disadvantages of a chamfer margin design?

A

-Care needed to avoid unsupported lip of enamel

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14
Q

What are the indications of a chamfer margin design?

A
  • Cast metal restorations

- Lingual margin of metal ceramic crowns

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15
Q

T/F The use of complete coverage restorations conserves more tooth structure than partial coverage fixed pros.

A

False

-Partial coverage conserves more tooth structure

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16
Q

What form of tooth preparation prevents dislodgement of restoration parallel to path of insertion?

A

-Retention form

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17
Q

What are three things in a preparation geometry that increases retention?

A
  • Increased axial surface area
  • Increased preparation height
  • Decreased Taper of Axial walls
18
Q

What type of cements are the most retentive?

A

-Adhesive Resin Cements

19
Q

Does the roughness of the intaglio surface increase or decrease retention?

A

-Increase

20
Q

Which has greater retention? Molar complete crown
Intracoronal restoration, Premolar complete crown
Partial crown

A

Most — Molar complete crown
Premolar complete crown
Partial crown
Least — Intracoronal restoration

21
Q

What form prevents dislodgement of restoration along a path other than path of insertion (tipping?)

A

-Resistance form

22
Q

Does decreased preparation diameter will you have increased or decreased resistance form?

A

-Increased

23
Q

Does complete seating of restoration lead to increased or decreased resistance?

A

-Increased resistance

24
Q

Do luting agents with increased compressive strength lead to increased or decreased resistance?

A

-Increased resistance

25
Q

Do luting agents with increased modulus of elasticity have increased or decreased resisitance?

A

-Increased resistance

26
Q

What prevents dislodgment of restoration due to permanent deformation (bending) of restoration during function?

A

Anti-deformation form

27
Q

What four factors influence deformation?

A
  • Material selection
  • Adequate tooth reduction
  • Proper occlusal or lingual concavity reduction form
  • Margin design
28
Q

What is type I alloy selection used for?

A

-Inlays

29
Q

What is a type II alloy used for?

A
  • Inlays
  • Onlays
  • Single units
30
Q

What is a type III alloy used for?

A
  • Single units

- Bridges

31
Q

What is a type IV alloy used for?

A

-Long span bridges

32
Q

What are three parts of the mechanical principles in tooth preparation?

A
  • Retention form
  • Resistance form
  • Deformation
33
Q

What are two types of glass ceramic?

A
  • Feldspathic porcelain

- Lithium Disilicate

34
Q

What is a type of crystalline ceramic?

A

-Zirconia

35
Q

What type of ceramics are usually bonded?

A

-Glass ceramics

36
Q

What type of ceramics are usually cemented/luted?

A

-Crystalline

37
Q

On metal-ceramic restorations what amount of occlusal reduction should be done?

A

-2.0 to 2.5 mm

38
Q

On metal-ceramic restorations what amount of facial axial reduction should be done?

A

-1.2 to 1.7 mm

39
Q

T/F Feldspathic porcelain is a non-abrasive type of porcelain

A

False

-It is abrasive

40
Q

What is an advantage of a shoulder margin design?

A

-Bulk of restorative material

41
Q

What is a disadvantage of a shoulder margin design?

A

-Less conservative

42
Q

What are the indications for a shoulder margin design?

A
  • Facial margin of metal-ceramic crowns

- Complete ceramic crowns

Fixed Pros 2020 (17 decks)

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