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REMOVABLE > FInal material want to memorize > Flashcards

FInal material want to memorize Flashcards

1
Q

use palatal strap for

A

class III

small posterior edentulous areas, minimal tissue support required

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2
Q

use palatal plate for

A

I and II

[long span I and II with or without IV]

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3
Q

use anterior posterior strap for

A

I, II, with or without class IV (so can be used to replace anterior teeth)

or palatal tori

or strong, widely separated abutments

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4
Q

use horseshoe

A

high valuted palates
any connector is better than this
can be used to replace anterior teeth

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5
Q

use lingual bar

A

ONLY on tissues
#1 first choice

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6
Q

lingual plate

A

teeth and tissues
do NOT use when crowed anterior teeth

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7
Q

labial bar

A

used when have lingually inclined anterior or posterior teeth

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8
Q

name all maxillary major connectors

A

ant-post palatal strap
palatal plate
horseshoe
palatal strap

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9
Q

name all major mand connectors

A

lingual bar
lingual plate
labial bar

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10
Q

name all minor connector examples

A

-guiding plane plates
-meshwork to hold acrylic
-any unit connecting any type of rest to major connector
-indirect retainers
-direct retainers
-rests

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11
Q

when is indirect retainer always necessary

A

in class I or II situations

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12
Q

component used to retain and prevent dislodgement

A

direct retainers
like clasp assembly

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13
Q

component that helps direct retainer in preventing displacement by lever action of opposite side of fulcrum

A

indirect retainer

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14
Q

indirect retainer usually connects to major connector and is in some form of

A

rest

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15
Q

Cast for the purpose of diagnosis and treatment planning

A

dx cast

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16
Q

replica of teeth, residual ridges and other parts of the dental arch used to fabricate dental restoration or prosthesis

(used to make prosthesis)

A

master cast

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17
Q

where acrylic meets metal

A

external finish line

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18
Q

major connector want ___mm from GM

A

6 mm

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19
Q

minor connector want ___mm fron GM

A

3mm

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20
Q

palatal strap mm

A

8-10mm

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21
Q

ant-post straps mm

A

6-8mm

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22
Q

lingual bar mm

A

3 mm from gm, 4 mm width= 7mm total

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23
Q

use this mand major connector when have less than 7mm of space

A

lingual plate

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24
Q

As length is increased, frictional retention is increased and resistance to rotation is

A

increased

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25
Q

width of guiding planes

A

1/3 B-L width of tooth
1/2 distance between cusps

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26
Q

length of

tooth supported guiding planes:
tooth-tissue supported guiding planes

A

tooth: 3-4mm
tooth-tissue: 1.5-2mm

(tooth supported like class III and IV have larger length of guiding planes)

(support from tissue takes a role in stability also, so thats why smaller for tooth-tissue rpds)

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27
Q

four factors in finding path of insertion

A
  1. guiding planes
  2. retentive undercuts
  3. interferences
  4. esthetics
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28
Q

4 objectives of dental surveying

A
  1. find path of insertion
  2. mark HOC
  3. measure/mark retentive undercut
  4. tripod cast
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29
Q

retentive clasp location

reciprocal clasp location

A

retentive clasp:
proximal 2/3 suprabulge
terminal 1/3: infrabulge
1 mm from GM
in gingival 1/3

reciprocal clasp:
all in infrabulge

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30
Q

if HOC too low, too high, no undercut, or inadquate undercut, what do you do

A
  1. survey crown
  2. enameloplasty to create undercut dimple
  3. addition of composite at site
31
Q

undercut gauges for
Cr-CO
Ni-Cr
wrought wire clasp

A

Cr-Co and Cr-Ni are both 0.01’

wrought wire is 0.02-0.03’

32
Q

what is blue for rpd design

A

framework
wrought wire clasp

33
Q

what is red for rpd design

A

undercuts
tooth modification areas (like rest seats)
guiding planes
survey line changes

34
Q

what is black on rpd design:

A

survey lines
tripod marks
soft tissue undercuts

35
Q

Impression for master cast when

A

after mouth preparations
then resurvey master cast

36
Q

primary retention of RPD

A

elements on abutment teeth

37
Q

secondary retention of RPD

A
  1. contact of minor connector with guiding plane
  2. contact of denture base and max major connector with underlying tissues
38
Q

two types of direct retainers:

A
  1. intracoronal
    -key/keyway
    -needs crown
    -complex and high maintence
  2. extracoronal
    -most common
    -CLASP ASSEMBLY
39
Q

clasp types:

A
  1. suprabulge
    -approaches from above HOC
    -circumferential, akers, circlet
  2. infrabulge
    -approaches from below HOC
    -bar clasps (I-bar, T-bar, 1/2 T-bar)
40
Q

with clasp assembly, you must always have:

A
  1. rest
  2. retentive clasp
  3. reciprocal clasp
  4. some type of minor connector
41
Q

what are options of rests

A
  1. occlusal rest
  2. cingulum chevron rest
  3. lingual ball rest
  4. incisal rest
42
Q

what are examples of reciprocal components

A
  1. lingual plate
  2. reciprocal clasp
  3. proximal plate/guide plate
43
Q

this requirement of clasp assembly resists vertical movement

A

support

44
Q

this requirement of clasp assembly resists horizontal movement

A

stability
-areas above HOC
-all rigid component

45
Q

Reciprocal component contacts tooth __________retentive clasp

A

at same time or BEFORE

46
Q

become active ONLY when disclosing forces are applied to them

A

retentive clasp

47
Q

when retentive clasp is doubled in length what happens to flexibility

A

8x more flexible

48
Q

when retentive clasp is doubled in diameter, what happens to flexibility

A

8x less flexible

(gets fatter; has nothing to do with 1/2 round or round shape. just fatter or not)

49
Q

this cross section of clasp is almost always in circumferential clasps:

this cross sectional of clasp is wrought wire:

A

1/2 round

wrought wire: round

50
Q

least flexible to most flexible material

A

Cr (0.01”) < Gold (0.015”) < Wrought wire (0.02”) most flexible

51
Q

this clasp PULLS towards occlusal to resist displacement:

A

circumferential clasp

52
Q

this clasp PUSHES toward occlusal to resist displacement

A

bar clasp

53
Q

6 types of retentive clasps

A
  1. circlet
  2. embrasure
  3. RPC
  4. reverse circlet
  5. ring
  6. combination
54
Q

when to use circlet clasp (circumferential clasp type)

A
  1. class III
  2. engages undercut remote from edentulous area
55
Q

when to use embrasure clasp:

A
  1. class IV ! (esthetics)
  2. class I or II withOUT Mods
56
Q

when to use ring clasp

A
  1. mesiolingually tipped mandibular molars
  2. ML undercut
    avoid if possible
57
Q

when to use combination clasp:

A
  1. class I or II (distal extension)
  2. wrought wire round retentive clasp
  3. MF undercut
  4. MUST be Distal rest
58
Q

when to use reversed circlet clasp:

A
  1. retentive undercut adjacent to edentulous space
  2. class I, II, III
  3. avoid if possible
59
Q

when to use RPC:

A

Rest (mesial), Proximal plate, Circumferential clasp (and minor connector)

  1. ML minor connector
  2. MF undercut
  3. class I or II
  4. circumferential retentive clasp

1/2 round EXCEPT with periodontally comprised teeth or class I and NO mods

60
Q

list the tooth-supported (class III and short span IV) clasp options:

A

rests adjacent to edentulous area

  1. circlet
  2. reverse circlet (when tissue undercut present)
  3. embrasure
  4. I-bar
  5. 1/2 T-bar
61
Q

list the clasp options for tooth-tissue (class I, II, and long span class IV)

A

mesial rests preferred

  1. RPC
  2. RPI
  3. reverse circumferential clasp
  4. 1/2 T-bar
  5. Combination clasp
62
Q

what type of lever do we want to create? and explain

A

class II lever (fulcrum line)
1. mesial rest
2. distal guide plane

this is a stress release clasp design

63
Q

RPI clasp design:

A

-MF or Mid-F undercut
-ML minor connector
-M rest
-D proximal plate (line angle to line angle)

CANT USE WHEN: tissue undercuts, shallow vestibule, abutment excess facial inclination

64
Q

minimum reduction needed for rest seat

A

1mm

65
Q

directs forces down the long axis of the teeth and prevents cervical movement of the RPD

A

function of rests

66
Q

5 types of rests

A

occlusal
embrasure
hooded
incisal
cingulum

67
Q

the major connector has 3 importants things must do

A
  1. counter leverage
  2. cross-arch stabilization
  3. unification of components
68
Q

major connectors are placed how many mm away from gingival margins in max and mand

A

max: 6mm
mand: 3mm

69
Q

once impression is taken for making cast, the impression should be poured within ____mins

A

12

**put in bag with little water!

70
Q

separate impression from cast in ____mins

A

45-60 mis

71
Q

denture base movement rotation occurs TOWARDS the tissue around the

A

most distal rests

72
Q

denture base movement rotation occurs AWAY from the tissue around

A

distal most retentive tips

73
Q

this is known as what distributes the forces of occlusion over as many teeth and as much soft tissue area as possible

A

broad-stress distribution

stress= occlusal forces/area

[increased area= decreased stress]

74
Q

this is essential to prevent displacement or deformation of metal framework during resin packing procedures

A

tissue stops

REMOVABLE (12 decks)

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