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D2 Spring > Fixed Exam 1 - Pontics > Flashcards

Fixed Exam 1 - Pontics Flashcards

1
Q

Biology, mechanics, or esthetics?

Cleansable tissue surface

A

Biology

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2
Q

Biology, mechanics, or esthetics?

Access to abutment teeth

A

Biology

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3
Q

Biology, mechanics, or esthetics?

No excessive pressure on ridge

A

Biology, mechanics, or esthetics?

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4
Q

Biology, mechanics, or esthetics?

Rigid (resist deformation)

A

Mechanics

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5
Q

Biology, mechanics, or esthetics?

Strong connectors to prevent fracture

A

Mechanics

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6
Q

Biology, mechanics, or esthetics?

Anatomy of tooth being replaced

A

Esthetics

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7
Q

Biology, mechanics, or esthetics?

Appears to “grow” out of edentulous site

A

Esthetics

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8
Q

Biology, mechanics, or esthetics?

Sufficient clearance for porcelain

A

Esthetics

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9
Q

Which Siebert classification of edentulous ridges?

Minimal width and height deficiency

A

Class N

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10
Q

Which Siebert classification of edentulous ridges?

9% of edentulous sites

A

Class N

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11
Q

Which Siebert classification of edentulous ridges?

Faciolingual loss of tissue width
Normal ridge height

A

Class I

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12
Q

Which Siebert classification of edentulous ridges?

32% of edentulous sites

A

Class I

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13
Q

Which Siebert classification of edentulous ridges?

Normal ridge width
Loss of ridge height

A

Class II

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14
Q

Which Siebert classification of edentulous ridges?

3% of edentulous ridges

A

Class II

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15
Q

Which Siebert classification of edentulous ridges?

Faciolingual loss of tissue width
Loss of ridge height

A

Class III

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16
Q

Which Siebert classification of edentulous ridges?

56% of edentulous sites

A

Class III

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17
Q

What type of pontic?

Zero tissue contact

A

Hygienic

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18
Q

What type of pontic?

All metal/zirconia has 2mm clearance from gingiva

A

Hygienic

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19
Q

What type of pontic?

Highly unaesthetic, used only for posterior

A

Hygienic

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20
Q

What type of pontic?

Concave gingival surface that overlaps ridge buccally and lingually

A

Ridge lap (saddle)

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21
Q

What type of pontic?

Not recommended since it is not hygienic

A

Ridge lap (saddle)

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22
Q

What type of pontic?

Combines best features of Hygienic and Ridge lap (saddle) pontics for great cleansability and esthetics

A

Modified ridge lap

23
Q

What type of pontic?

Slight tissue contact on facial aspect of ridge, giving a natural appearance of a tooth emerging from the gingiva

A

Modified ridge lap

24
Q

What type of pontic?

All surfaces should be convex to allow hygiene

A

Modified ridge lap

25
Q

What type of pontic?

Most common

A

Modified ridge lap

26
Q

What type of pontic?

Egg-shaped, bullet-shaped, heart-shaped

A

Conical

27
Q

What type of pontic?

Not esthetic or hygienic, indicated for posterior extraction sites w/ narrow alveolar ridge

A

Conical

28
Q

What type of pontic?

Most esthetic

A

Ovate

29
Q

What type of pontic?

Depression/hollow in residual ridge, makes it look like it’s emerging from the gingiva

A

Ovate

30
Q

What type of pontic?

Used in highly esthetic cases (ex: high smile line)

A

Ovate

31
Q

What should be used to avoid ridge collapse?

A

Socket preservation

32
Q

What can be done to an old ext site to create more ridge volume?

A

Soft tissue graft

33
Q

What type of pontic?

Retained and supported only on one end by one or more abutments

A

Cantilever

34
Q

What type of pontic?

Very high risk of failure, should never be part of the ideal tx plan due to unfavorable biomechanics

A

Cantilever

35
Q

When is the only appropriate time to consider using a cantilever pontic?

A

Replacing a maxillary lateral incisor

36
Q

When replacing a maxillary lateral incisor with a cantilever pontic, the pontic should have very ________ occlusal contact in CO, MIP, and every eccentric movement

A

light

37
Q

What are the 2 potential complications of a cantilever pontic?

A

Torque abutment teeth
Retainer decementation

38
Q

A pontic should have no contact or slight contact with tissue. Avoid too much _________ (soft tissue blanching)

A

pressure

39
Q

What is the main cause of tissue irritation from a pontic?

A

Plaque btwn pontic and ridge

40
Q

What 3 things can be used to clean under a pontic?

A

Superfloss
Proxy brush
Floss threader

41
Q

Since FDPs are exposed to increased amounts of load due to the fact that are long restorations, they should be reinforced with a ________ framework

A

strong

42
Q

Porcelain is too brittle, it will break under __________

A

flexure

43
Q

Which pontic material?

Most common, 99% of pontics are made of this

A

Metal/ceramic

44
Q

Which pontic material?

High abrasion resistance (needs to be polished)
Stable and strong

A

Metal/ceramic

45
Q

Which pontic material?

Not common

A

Resin veneered

46
Q

Which pontic material?

Low abrasion resistance
Dimensional change from water absorption
Mechanical retention

A

Resin veneered

47
Q

Which pontic material?

Very weak
Substructure matrix of glass or polymer fiber provides structural strength

A

Fiber-reinforced composite resin

48
Q

Reducing the buccolingual width of the pontic by as much as ______% has been suggested to reduce the occlusal load on the retainers and to follow a narrow residual ridge

A

30%

49
Q

What is the greatest challenge to replicate after extraction?

A

Gingival changes

50
Q

What are the options to replicate gingival changes after extraction?

A

Bone graft
Soft tissue graft
Pink porcelain

51
Q

After extraction, the buccal plate is at high risk of __________. A bone graft is recommended to conserve as much bone as possible

A

resorption

52
Q

How thick is the buccal plate?

A

0.5-1mm

53
Q

The correct _____________ height/length is critical to esthetic pontic design

A

inciso-gingival

54
Q

What are the 2 ways to achieve a correct mesiodistal width for the pontic?

A

Ortho
Visual perception (match location of line angles and adjust interproximal areas)

D2 Spring (18 decks)

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