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RPD > Midterm > Flashcards

Midterm Flashcards

1
Q

Where do you not set teeth past on the mandibular arch?

A

Where the alveolar ridge starts to ascend to the retromolar pad area.

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2
Q

PAS Negative

A

Metal Allergy

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3
Q

PAS Positive

A

Candida

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4
Q

What is the most aesthetic replacement tooth?

A

Tube tooth

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5
Q

How far from the gingival margin must the maxillary major connect be?

A

5-6mm

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6
Q

How many direct retainers are needed for Kennedy Class III/IV?

A

4

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7
Q

What Kennedy class doesn’t need indirect retainers?

A

III

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8
Q

In what Kennedy Class are indirect retainers needed to prevent rotation of extension base?

A

I/II

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9
Q

What is the min width of the posterior palatal strap major connector?

A

8mm

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10
Q

Where are indirect retainers placed in relation to the fulcrum line?

A

as far as possible

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11
Q

What is the min the superior border of mandibular lingual bar needs to be from the gingiva?

A

4mm, it can be more

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12
Q

Where is the canine rest prep located?

A

junction of cervical and middle 1/3

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13
Q

What partial is indicated in a pt with limited room?

A

metal based partial with occlusion constructed in metal

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14
Q

Where does the base attachment and major connector on the maxillary arch need to extend to?

A

hamular notch

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15
Q

Where is the I bar placed?

A

Midfacial or slightly mesial to mid facial

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16
Q

Where is a metal tooth used?

A

In limited spaces, especially the mandibular, where esthetics are not as critical

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17
Q

What should the lingual plate cover?

A

Cingulum and scallop from contact point to contact point on each tooth.
Never on the marginal gingiva!

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18
Q

What is the posterior tooth selection rule?

A

Select tooth with slightly steeper cusp than on the pts existing teeth

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19
Q

Thee terminal 1/3 of direct retainer tips should be no higher than, what?

A

the junction of the cervical and middle 1/3

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20
Q

What is the minimum thickness of the lingual bar?

A

4mm

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21
Q

What is the best choice for anterior tooth replacement on a RPD?

A

Facings

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22
Q

What should the width of rest preps be?

A

1/2 width from cusp tip to cusp tip OR 1/3 the width from buccal surface to lingual surface

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23
Q

What technique is used for a tooth supported RPD reline?

A

Closed mouth technique

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24
Q

What technique is used for a distal extension RPD reline?

A

The mouth open holding framework in position

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25
Q

Where is a distal rest not used?

A

On an abutment next to distal extension

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26
Q

What arch is an altered cast not usually done?

A

maxillary

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27
Q

When is the best time to select teeth?

A

Initial or TP appt

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28
Q

What class of mobilities must be extracted before an RPD is made?

A

Class III mobilities

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29
Q

Where are stops places?

A

non-occluding cusps

30
Q

What is the correct depth of an occlusal rest prep?

A

1.5mm at the marginal ridge

31
Q

What is the advantage of a wrought wire clasp?

A

flexible

32
Q

What should the impression thickness PVS be?

A

3mm

33
Q

What needs an undercut of 0.01?

A

C-clasp
I Bar
Aluminum clasp

34
Q

What is the undercut needed for a wrought wire clasp?

A

> 0.01

35
Q

Where do you reline the baseplate?

A

on the cast

36
Q

In what kennedy class do you want occlusion on denture teeth?

A

IV

37
Q

What is the number 1 reason for loss of a complete over denture abutment?

A

periodontal complications

38
Q

What is the quality of a denture where it resists the vertical forces attempting to dislodge it?

A

Retention

39
Q

What is the quality of a prosthesis to be firm, steady, constant and to resist displacement by functional, horizontal, or rotational forces?

A

Stability

40
Q

What does the minor connector unite?

A

Major connector with other parts of RPD (rests, indirect retainers, direct retainers, and base)

41
Q

What is a direct retainer?

A

Any unit of RPD that engages an abutment tooth in such a manner as to resist displacement in an occlusal direction

42
Q

What does the stabilizing component by a reciprocal action resist?

A

Horizontal stresses placed on an abutment tooth by the retentive arm of the clasp

43
Q

What is the purpose of the indirect retainer?

A

Assists the direct retainer in such a manner as to resist rotation of the distal extension of the restoration in an occlusal direction.

44
Q

What is the purpose of the denture base?

A

Covers the edentulous ridge and unites artificial teeth to the framework

45
Q

What do embrasure rests prevent?

A

wedging of the metal framework.

46
Q

Name 4 types of maxillary major connectors?

A
  • Anterior-Posterior Palatal Strap
  • Palatal Strap
  • Palatal Plate
  • U-Shaped or Horse-shoe
47
Q

Name 4 types of mandibular major connectors?

A
  • Lingual bar
  • Lingual plate
  • Sublingual Bar
  • Labial Bar
48
Q

What direct retainer, is extracoronal, originating from the framework or base and crosses the soft tissue to engage the tooth undercut from a cervical direction?

A

Bar Type - Roach Clasp

49
Q

What direct retainer, has an arm that
originates above the height of contour, crosses
the suprabulge, and approaches the undercut
from an occlusal direction.

A

Circumferential

50
Q

Where does the I bar engage?

A

an undercut at the mid facial

51
Q

Where does a Modified “T” bar engage?

A

undercut on the distofacial

52
Q

Where does a Y bar cast clasp engage?

A

MF and or DF surface of the tooth

53
Q

When is a ring clasp used?

A

When an undercut cannot be approached by other means.

Encircles the tooth by ~320 degrees.

54
Q

What area is a facing usually used for tooth replacement?

A

Anterior for a short span edentulous area

55
Q

What is a facing?

A

Facial surface of a prosthetic tooth OR veneer luted to the retentive metal framework with adhesive.

56
Q

When is a Tube Tooth used?

A

Area where span is very narrow and retention is a problem.

57
Q

If space is insufficient for a tube tooth what must be used?

A

Metal tooth or facing

58
Q

Where is a metal tooth used?

A

In an area where there is not enough space between teeth to place a prosthetic plastic tooth.

59
Q

What is a butt joint created on the tissue side of the framework, the acrylic resin holds teeth to the framework.

A

Internal Finish Line

60
Q

What is a butt joint created on the tongue side of the framework, it is at the junction of the man connector and the base attachment minor connector

A

External Finish Line

61
Q

What is the outline of an occlusal rest?

A

rounded triangle shape 2.5mm in width, 1/3 of buccal to lingual surfaces

62
Q

What should the angle between the minor connector and the rest seat be?

A

< 90 degrees

63
Q

What is the thickness of a rest seat?

A

1mm thick at its thinnest point

64
Q

For an occlusal rest how much does the marginal ridge need to be reduced?

A

1.0-1.5mm

65
Q

In what kennedy class will you have an extended occlusal rest seat on the posterior teeth to have enough support?

A

Class II Mod I

66
Q

Where are rests placed on a medially tipped molars?

A

Mesial and distal surfaces using a ring clasp

67
Q

What is the shape of the lingual rest?

A

Rounded V

width 2.5-3mm

68
Q

What class of lever is the most destructive (teeter-totter)?

A

1st Class - RFE

69
Q

What is the prevention of the sagittal axis rotation?

A

rigidity or minor and major connectors

70
Q

What is the prevention of the horizontal axis rotation?

A

Occlusal rests

Common in Class I or II

71
Q

What causes vertical axis rotation?

A

occurs during horizontal rotation during mastication

RPD (1 decks)

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