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Module 5 pros > saddles, connectors and retainers > Flashcards

saddles, connectors and retainers Flashcards

1
Q

the part of the p denture which carries the artificial teeth and replaces lost tissue

A

saddle

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2
Q

abutment teeth at either end of the saddle

A

bounded saddle

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3
Q

single abutment tooth at mesial end of the saddle

A

free end saddle

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4
Q

a tooth which the loss of will convert a bounded saddle into a free end saddle

A

critical abutment tooth

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5
Q

kennedy class 1

A

bilateral free end saddle

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6
Q

kennedy class 2

A

unilateral free end saddle

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7
Q

kennedy class 3

A

single bounded saddle not crossing midline

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8
Q

kennedy class 4

A

single bounded saddle which crosses midline

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9
Q

a part of a p denture which unites other components

A

connector

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10
Q

types of connectors

A

major and minor

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11
Q

major connector role

A

unites p denture saddles
provides bracing
provides indirect retention
acts as splint

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12
Q

materials for major connectors upper p

A

PMMA
gold
CoCr

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13
Q

types of connectors for lower partial dentures

A

lingual plate
CoCr lingual plate
dental bar
lingual bar
split lingual bar
split lingual plate

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14
Q

when would you use a split lingual plate

A

insufficient sulcus depth

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15
Q

what type of partial denture could you prescribe if retention/ stability is compromised?

A

swinglock

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16
Q

what type of p denture could you prescribe to someone who has just has oral cancer surgery?

A

swing lock

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17
Q

major connectors for upper p dentures

A

PMMA plate
Co/Cr base plate

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18
Q

shapes of palatal plates for single tooth

A

spoon
T

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19
Q

types of connectors for kennedy class 2

A

horseshoe connector (ant pal bar)
mid palatal bar
posterior pal bar

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20
Q

what risks come with a sectional maxillary denture

A

inhalation

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21
Q

the connecting component between the major connector or base of a p denture and other units such as clasps and rests

A

minor connector

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22
Q

when may you need to modify a base

A

if lower teeth occlude onto upper ridge

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23
Q

what modifications can you add to a base

A

CoCr striking plate

24
Q

how are dentures retained

A

physical forces from saliva between denture base and mucous membrane
muscle activity of lips cheeks and tongue

25
Q

when would you prescribe a spoon denture

A

temporarily post xLA

26
Q

Partial denture retention

A

clasps

27
Q

objects of surveying

A

determine path of insertion
assess teeth and tissue undercuts for retention
determine depth of undercuts for clasps

28
Q

what is used to check for presence of and location of undercut during surveying

A

analysing rod

29
Q

what is used to mark the survey line and hence the position of the undercut during surveying

A

marking rod

30
Q

what is used to measure the depth of undercut when surveying

A

undercut gauge

31
Q

types of clasps

A

occlusally approaching
gingivally approaching

32
Q

what type of clasp is more rigid and efficient at bracing

A

occlusally apporaching

33
Q

what type of clasp is less caries susceptible

A

gingivally approaching

34
Q

types of gingivally approaching clasps

A

T roach

35
Q

what does it mean when a clasp is passive when seated

A

puts no force on tooth

36
Q

when must a clasp flex

A

to pass the bulbosity

37
Q

what is reciprocation

A

a suitable element provided to the other side to act as a balance to counteract force

38
Q

providing resistance to lateral/ horizontal forces on the denture

A

bracing

39
Q

what type of clasp could be used for pts with no undercut

A

ball ended clasp - engages undercut in interproximal area

40
Q

what type of clasp provides retention and bracing

A

ring clasp

41
Q

materials for clasps

A

Cast CoCr
Wrought stainless steel
Gold
Thermoplastic copolymer - dental D

42
Q

what undercut does cast CoCr clasps engage

A

up to 0.25mm

43
Q

what undercut depth does ss clasps angage

A

up to 0.5mm

44
Q

what undercut depth do gold clasps engage

A

up to 0.75mm

45
Q

what undercut depth do thermoplastic copolymer clasps engage

A

deep undercuts

46
Q

what are types of tooth prep?

A

addition of composite
grinding
crown placement
prep to alter survey line

47
Q

when would you grind tooth prep

A

allow call ended clasp engagement

48
Q

when would you add crown placement

A

provide undercuts

49
Q

when would you add composite for tooth prep

A

provide retention

50
Q

what type of clasp would you use if the undercut is lingual

A

ring clasp

51
Q

what type of clasp would you use if undercut close to gingival margin

A

gingivally approaching

52
Q

when can you not use CoCr clasp and why

A

if undercut more than 0.25mm as too much force is required

53
Q

what are guide planes

A

making surface at either end of saddle area parallel to limit path of insertion to improve stability

54
Q

RPI system

A

r - mesial rest
p - distal guiding plate
i - I-shaped retentive clasp i.e. I bar

55
Q

when would you use the RPI system

A

free end saddle

56
Q

why is an RPI system used

A

reduces stress on abutment tooth

57
Q

what is lock and key

A

one part on tooth (in crown or inlay) and other in denture - slots in

Module 5 pros (16 decks)

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