saddles, connectors and retainers

Question 1

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

Answer 1

saddle

Question 2

abutment teeth at either end of the saddle

Answer 2

bounded saddle

Question 3

single abutment tooth at mesial end of the saddle

Answer 3

free end saddle

Question 4

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

Answer 4

critical abutment tooth

Question 5

kennedy class 1

Answer 5

bilateral free end saddle

Question 6

kennedy class 2

Answer 6

unilateral free end saddle

Question 7

kennedy class 3

Answer 7

single bounded saddle not crossing midline

Question 8

kennedy class 4

Answer 8

single bounded saddle which crosses midline

Question 9

a part of a p denture which unites other components

Answer 9

connector

Question 10

types of connectors

Answer 10

major and minor

Question 11

major connector role

Answer 11

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

Question 12

materials for major connectors upper p

Answer 12

PMMA
gold
CoCr

Question 13

types of connectors for lower partial dentures

Answer 13

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

Question 14

when would you use a split lingual plate

Answer 14

insufficient sulcus depth

Question 15

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

Answer 15

swinglock

Question 16

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

Answer 16

swing lock

Question 17

major connectors for upper p dentures

Answer 17

PMMA plate
Co/Cr base plate

Question 18

shapes of palatal plates for single tooth

Answer 18

spoon
T

Question 19

types of connectors for kennedy class 2

Answer 19

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

Question 20

what risks come with a sectional maxillary denture

Answer 20

inhalation

Question 21

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

Answer 21

minor connector

Question 22

when may you need to modify a base

Answer 22

if lower teeth occlude onto upper ridge

Question 23

what modifications can you add to a base

Answer 23

CoCr striking plate

Question 24

how are dentures retained

Answer 24

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

Question 25

when would you prescribe a spoon denture

Answer 25

temporarily post xLA

Question 26

Partial denture retention

Answer 26

clasps

Question 27

objects of surveying

Answer 27

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

Question 28

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

Answer 28

analysing rod

Question 29

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

Answer 29

marking rod

Question 30

what is used to measure the depth of undercut when surveying

Answer 30

undercut gauge

Question 31

types of clasps

Answer 31

occlusally approaching gingivally approaching

Question 32

what type of clasp is more rigid and efficient at bracing

Answer 32

occlusally apporaching

Question 33

what type of clasp is less caries susceptible

Answer 33

gingivally approaching

Question 34

types of gingivally approaching clasps

Answer 34

T roach

Question 35

what does it mean when a clasp is passive when seated

Answer 35

puts no force on tooth

Question 36

when must a clasp flex

Answer 36

to pass the bulbosity

Question 37

what is reciprocation

Answer 37

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

Question 38

providing resistance to lateral/ horizontal forces on the denture

Answer 38

bracing

Question 39

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

Answer 39

ball ended clasp - engages undercut in interproximal area

Question 40

what type of clasp provides retention and bracing

Answer 40

ring clasp

Question 41

materials for clasps

Answer 41

Cast CoCr Wrought stainless steel Gold Thermoplastic copolymer - dental D

Question 42

what undercut does cast CoCr clasps engage

Answer 42

up to 0.25mm

Question 43

what undercut depth does ss clasps angage

Answer 43

up to 0.5mm

Question 44

what undercut depth do gold clasps engage

Answer 44

up to 0.75mm

Question 45

what undercut depth do thermoplastic copolymer clasps engage

Answer 45

deep undercuts

Question 46

what are types of tooth prep?

Answer 46

addition of composite grinding crown placement prep to alter survey line

Question 47

when would you grind tooth prep

Answer 47

allow call ended clasp engagement

Question 48

when would you add crown placement

Answer 48

provide undercuts

Question 49

when would you add composite for tooth prep

Answer 49

provide retention

Question 50

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

Answer 50

ring clasp

Question 51

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

Answer 51

gingivally approaching

Question 52

when can you not use CoCr clasp and why

Answer 52

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

Question 53

what are guide planes

Answer 53

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

Question 54

RPI system

Answer 54

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

Question 55

when would you use the RPI system

Answer 55

free end saddle

Question 56

why is an RPI system used

Answer 56

reduces stress on abutment tooth

Question 57

what is lock and key

Answer 57

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