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Removable Partial Prosthodontics > Direct Retainers Part I > Flashcards

Direct Retainers Part I Flashcards

1
Q

RPD retention resists:

A

dislodging forces

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2
Q

Mechanical retention from retaining elements on abutment teeth:

A

primary retention

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3
Q

Retention due to the intimate contact of minor connector with guide planes

A

secondary retention

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4
Q

Retention due to intimate contact of denture base & maxillary major connector with underlying tissue:

A

secondary retention

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5
Q

RPD component used to retain and prevent dislodgment:

A

direct retainer

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6
Q

direct retainer with internal precision attachment: key/ keyway

A

intracoronal

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7
Q

What type of direct retainer is most esthetic?

A

intracoronal

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8
Q

What are the disadvantages to an intracoronal direct retainer?

A

require crown, complex fabrication, & high maintenance

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9
Q

Direct retainer with clasp assembly:

A

extracoronal

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10
Q

What type of direct retainer is most commonly used?

A

extracoronal

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11
Q

Clasp types include:

A
  1. suprabulge
  2. infrabulge
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12
Q

What are the two types of direct retainers?

A
  1. intracoronal
  2. extracoronal
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13
Q

This image shows a:

A

intracoronal direct retainer

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14
Q

This image show a:

A

extra coronal direct retainer

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15
Q

What type of clasp is shown?

A

suprabulge

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16
Q

What type of clasp is show?

A

infrabulge

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17
Q

Clasp type:

  • retentive arm approaches undercut from above the survey line
A

suprabulge

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18
Q

Clasp type:

  • retentive arm approaches undercut from below survey line
  • contains bar clasps
A

infrabulge

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19
Q

Circumferential, Akers, and Circlet are all synonyms for what clasp type?

A

suprabulge

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20
Q

What clasp type contains bar clasps?

A

infrabulge

21
Q

From top to bottom the parts of the supra-gingival clasp assembly include:

A
  1. rest
  2. reciprocal clasp
  3. retentive clasp
  4. proximal plate
22
Q

Label the types of clasps seen in the following image:

A

top: suprabulge
bottom: infrabulge

23
Q

A properly constructed suprabulge or infrabulge clasp assembly must incorporate the following components:

A
  1. Rest
  2. Retentive clasp
  3. Reciprocal element
  4. One or more minor components
24
Q

Label the following parts of the clasp assembly:

A

A: retentive clasp arm
B: rest
C: minor connector
D: reciprocal arm

25
Q

Label the parts of the image:

A

A: Direct Retainer
B: Direct Retainer
C: Reciprocal Plate
D: Reciprocal Arm
E: Rest

26
Q

Clasp assembly component that lies on occlusal, lingual, and incisal surface, that prevents tissue ward movement of clasp:

A

Rest

27
Q

Label the types of rests shown: (from left to right)

A
  1. occlusal rest
  2. cingulum chevron rest
  3. lingual ball rest
  4. incisal rest
28
Q

What is the function of the rest? (component of clasp assembly)

A

prevents tissue ward movement of clasp

29
Q
  • rigid component
  • above heigh of counter
  • reciprocal clasp
  • lingual plate
  • proximal plate
  • guide plate (minor connectors)
A

Reciprocal components

30
Q

The retentive clasp arm is located in the:

A

proximal 2/3

31
Q

Retentive clasp arm is the ___ portion

A

rigid portion

32
Q

The retentive terminal is located in the:

A

distal 1/3

33
Q

The retentive terminal can be described as:

A

flexible

34
Q

The retentive terminal is ____ the height of contour

A

below

35
Q

The retentive clasp arms are located ___ the height of contour

A

above

36
Q

What provides direct retention? (retentive terminal or retentive clasp arm)

A

retentive terminal

37
Q

What type of retention is provided by the retentive terminal?

A

direct

38
Q

clasp assembly component that joins the body of clasp to framework:

A

minor connector

39
Q

The minor connector can be described as:

A

rigid

40
Q

This image is showing the:

A

minor connector

41
Q

Component of the bar clasp that connects the clasp to framework:

A

approach arm

42
Q

The 6 requirements of clasp assembly include:

A
  1. support
  2. stability
  3. encirclement of MORE THAN 180 degrees
  4. reciprocation
  5. passivity
  6. retention
43
Q

What component of clasp assembly is involved with support?

A

rests

44
Q

Requirement of clasp assembly that resists vertical movement toward tissue:

A

support

45
Q

Support resists ____ movement toward ____.

A

vertical movement toward tissue

46
Q

Requirement of clasp assembly that resists horizontal displacement:

A

stability

47
Q

What components of clasp assembly are involved with “stability”?

A

all rigid components of direct retainer

48
Q

Requirements of clasp assembly (STABILITY)

A

Removable Partial Prosthodontics (12 decks)

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