rpd

Question 1

KC1

Answer 1

bilat FES

tooth & tissue borne

Question 2

KC2

Answer 2

unilat FES

tooth & tissue borne

Question 3

KC3

Answer 3

pos bounded saddle

tooth borne rpd

Question 4

KC4

Answer 4

single ant saddle

tooth borne rpd

Question 5

objective of surveying

Answer 5

1. determine best POI & POW
2. identify which undercuts to block out (palatal/lingual, M/D)
3. identify which undercuts to be used to aid retention (on buccal side)

Question 6

where are GP placed

Answer 6

vertical parallel surfaces of abutment teeth

~1/2 - 1/3 axial height of tooth

Question 7

what is resting position

Answer 7

habitual postural position when md of pt resting comfortably in an upright neutral position

Question 8

FWS

Answer 8

space btwn md and mx in resting position. ~2-4mm

Question 9

RVD

Answer 9

amt of seperation btwn mx md when md in resting position

Question 10

OVD

Answer 10

amt of separation btwn mx and md when teeth in MI

RVD - FWS = OVD

Question 11

consequences of too little FWS

Answer 11

• trauma to denture bearing tissues
• clicking during speech
• difficulty w phonetics
• strained appearance
• TMD

Question 12

consequences of too much FWS

Answer 12

• lack facial support
• difficulties w mastication
• dribbling of saliva
• angular cheilitis
• cheek biting
• TMD

Question 13

saddle

Answer 13

caries artificial teeth, covers alveolar ridges

Question 14

rest

Answer 14

provides support

Question 15

direct retention

Answer 15

clasps

Question 16

indirect retention

Answer 16

rests placed opposite side of fulcrum line

Question 17

connectors

Answer 17

units all components of RPD

Question 18

what components provide support

Answer 18

rests, flanges

Question 19

what components provide retention

Answer 19

clasps, gp

Question 20

what components provide bracing

Answer 20

flange, connectors

Question 21

steps to design denture

Answer 21

1. outline saddle
2. what kind of support (rests, gp)
3. connector
4. retention (clasps)
5. reciprocators for CoCr

Question 22

FES use what retention

Answer 22

rpi for cocr

rpr for acrylic (wrought wire can’t bend into an i bar)

Question 23

types of enamel mod

Answer 23

rest seats 
ocl channel 
gp
modify unfavourable undercut
modifying ocl plane

Question 24

3 mechanisms of retention

Answer 24

1. physical forces (surfaces forces from saliva adhesion, fluid forces, atmp forces for border seal)
2. muscular retention
3. mechanical retention (direct and indirect retainers)

Question 25

clasps structure & placement

Answer 25

• cover >180 degrees of tooth
• rigid part of clasp above survey line
• only 1/3 end of clasp under survey line

Question 26

cocr vs ss

Answer 26

ss greater tensile strength so it can be used in smaller diameters
ss requires 0.5mm undercut
cocr require 0.25mm undercut

Question 27

components of clasp assembly

Answer 27

rest
clasp
reciprocator
proximal plate

Question 28

suprabulge clasp

Answer 28

approach retentive undercut from ocl direction

Question 29

infrabulge clasp

Answer 29

approach retentive undercut from gingival direction

Question 30

roach clasp

Answer 30

need >4mm of sulcus depth

Question 31

combined ap bar

Answer 31

bar must have >6mm away from gingival margin

space btwn 2 bars >15mm

Question 32

lingual bar

Answer 32

> 8mm of alveolar ridge required (3mm from gingival margin, 3-4mm thickness of bar, 1-2mm from bar to floor of mouth)

Question 33

sublingual bar

Answer 33

> 5mm of sulcus depth

used when no space for lingual bar

Question 34

denture repair material

Answer 34

cold cure / auto polym acrylic

Question 35

imm denture

Answer 35

placed in mouth imm after exo. helps pt maintain normal appearance, act as compression & protection