Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

mental dental > NEW PROSTH MD > Flashcards

NEW PROSTH MD Flashcards

1
Q

TOOTH that the bridge attaches to is called what?

A

abutment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

an intermediate abutment ( abutment supported bridge by itself) is called?

A

pier

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

2 types of teeth bridge should not be on

A

endo treated

perio teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

ideal crown to root ratio

A

1 C: 2 R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

minumum crown to root ration and uneccaptable one

A

1;1

2;1 = poor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

antes law states?

A

PDL surface of abbutment teeth should be equal or greater than imaginary PDL surface area of missing teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

failure of antes law, what should happen?

A

splingting teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what should be done when replacing canine?

A

central and lateral should be splinted together to prevent lateral drifting of bridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

T or F diverging multiple curved roots are preferred over fused conical rounded roots?

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is COMBINATION SYNDROME

A

edentulous maxillary and partial edentulous mandibular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

cement retained vs screw retained

which one allows minor angle correction?
more economical
more chair time?
good maintenance?
cause peri-implantitis?
A 
cement:
- angle correction
- more economical
more chair time
excess cement= PERI IMPLANTITIS!!!

SCREW: good maintenance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what controls setting rate in alginate?

A

trisodium phophate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

position of condyles in CR?

A

most anterior and superior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

cr or mi more reliable?

A

CR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

on an articulator, what does hinge axis simulate?

A

TMJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are the 2 angles you want on semi-adjustable articular

A

bennett angle= 15 degrees

HCI (horizontal condylar inclination): 30 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

alginate cats vs elastomeric material casts

which material is more accurate for each bite registration?

A

alginate: wax records
elastomeric: PVS or ZOE paste

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what represents condylar guidance and incisal guidance on articulate?

A

condylar: HCI ( horizontal condyl inclination)
- post determinatnt of conclusion
HCI : steepness of articulator surface of temporal bone related to horizontal plane

incisal guidance: pin and guide table articulator
- anterior determinnant of occlusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what is canine guidance?

A

when lateral mvmnts cause post teeth to disclude when contact on upper and lower canine on working side happen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what is anterior guidance

A

incisal and canine guidance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

during protrusive movements, ___ provides clearance for all posterior teeth

A

incisal and condylar guidance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

during lateral, canine on working side and condyle on balancing side provide what?

A

clearance for post teeth on balancing side ( side mandible moving away from)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

where is hamular notch?

A

right by virbrating line ( google it)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

retromolar pad contains attachment from what 4 muscles? ***

A

temporalis
buccinator
superior pharyngeal constrictor
pterygomandibular raphae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

f

A

f

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

the area between mandibular alveolar ridge and tongue

A

alveololingual sulcus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what provides support for denture in mandible?

A

buccal shelf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

most to least common to get frenectomy ?

lingual labial buccal

A

Labial > buccal > lingual

LaBuLi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

most common area for flabby hypermobile ridges?

A

anterior maxilla

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

overextended flange causes what?

A

epulis fissuratum ( hyperplastic tissue)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

papillary hyperplasia ( ill fitting denture) caused by what PATHOGEN?

A

candidiasis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

cpmbination syndrome has bone absorption in the anterior edentulous maxilla when opposing what teeth?

A

mandibular ANTERIOR only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

when is the only way root tips may be left alone?

A

if they have intact lamina dura and no r/l !

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

patient has illfitting denture and hat.what do they have?

A

pagets diseae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

WHY is tori removal done?

A

if created undercut and affects posterior seal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

what is christenson phenomenon?

A

distal space created b/w max and mand occlusal surface when mandible protruded

A gap occurring in the natural dentition or between the opposing posterior flat occlusal rims when the mandible is protruded (posterior open bite). It can lead to instability in full dentures unless compensating curves are incorporated into the dentures.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

balanced occlusion:

what should be avoided in terms of guidance?
what should the balancing side have in terms of what cusps occlude with what teeth ?
what should working side have?

A

anterior guidance shoud be avoided

balancing: max lingual cusps contact lingual incline of mand buccal cusps

working side: max lingual cusps contact facial incline of mand lingual cusps and mand buccal cusps contact lingual incline of max buccal vusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

what is the only occlusion we want on a denture?

A

lingualized occlusion:

palatal cusps max post teeth contact mand posterior teeth ( eliminates destabilizing buccal force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

curve of spee vs curve of wilson

A

Spee: anteroposterior curve, ensure loading into long axis of each tooth; more MESIAL inclination as move distally

wilson: mediolateral curvealong posterior cusp tip to ensure loading into of each tooth
more LINGUAL inclination as move distally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

resistance to VERTICAL seating forces is called ?

A

support

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

what provides support for mandible and maxillary?

A

mand: buccal shelf/ retromolar pad
max: palate/ alveolar ridges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

what part of denture gives support?

A

base

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

resistance to HORIZONTAL dislodging forces

A

stability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

what provide stability for upper and lower arch

A

ridge height

depth of vestibule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

what part of denture provides stability

A

denture flange

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

resistance to VERTICAL dislodging forces is called what? and what part of denture provides it?

A

retention

peripheral seal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

better saliva, thick and ropy or thin and watery?

A

thin and watery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

what is surface tension?

A

combination of adhesion and cohesion forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

if denture is extended too far back occlusal forces would ___ the denture

A

dislodge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

if a denture flange is too short it causes a lack of ___

A

retention

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

what are 2 parts of heat-cured acrylic

A

PMMA: polymer ( powder)

MMA= monomer (liquid)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

liquid inhibitor called?

A

hydroquinone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

initiator in PMMA powder

A

benzoyl peroxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

when processing denture. more shrinkage occurs when?

A

there is excessive monomer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

ideal ration of monomer to polymer

A

1:3
monomer= liquid
polymer= powder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

when does porosity happen?

A

underpacking with resin or being heated too rapidly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

T or false, acrylic teeth have better retention

A

T because can bond to acrylic resin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

more brittle acrylic or porcelain?

A

porcelain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

what is the function of major conenctor on denture?

A

provide RIGIDITY

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

most rigid maxillary major connector

A

complete palatal plate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

least rigid of maxillary major connector

A

horeshoe

only use if have tori

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

all major connectors should cross midline at what angle?

A

right angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

function of beading and when would you do it?

A

only for max major conenctor

.5mm round groove across boarder prevent food impaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

when lingual vestibule depth is < 7mm

A

lingual plate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

patient walks in and needs denture. he is missing a canine and has bad period. what would you make him?

A

labial bar swinglock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

purpose of rest?

A

SUPPORT: directs forces through long axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

occlusal rest:
MD width?
intercuspal width?
depth?

A

1/3 MD
1/2 IW
1.5mm deep

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

cingulum rest seat:
MD length?
labiolingual width?
depth?

A

2.5-3 MD
2 LL width
1.5 deep

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

guide planes:
Buccolingual width?
how far does it extend?

A

1/3 BL

2-3 mm vertically down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

Indirect retainer ROTATIONAL movement centered around lien drawn in most ___ rests (m or D)

A

Distal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

what does indirect retainer do?

A

provides bracing to resist rotational movement of distal extension area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

Rest, minor conenctor, retentive clasp arm, reciprical clast arm

which one is retention, stability, support, ?

A

restminor connector and reciprical: stability
rest: support
retnetive clasp: retention

73
Q

T or F retentive clasp is above HOC

A

false BELOW

74
Q

where does retentive clasp engage and how does it work

A

engage undercut resist dislodging forces only when dislodging forces applied to them

75
Q

reciprical clasp engages where? function?

A

contacts tooth ABOVE hoc and survey line

braces abutment tooth so not torqued by retetntive clasp

76
Q

Suprabulge vs infrabulge clasp design

A

Supra: akers, ring, embrasure (originates above survey line)

infra: I bar, T bar ( originates below survey line)

77
Q

where does retentive and reciprical clasp orginate from?

A

minor connector and rst

78
Q

when yndercut is adjacent to bounded edentulous space what type of clasp do you use ?

A

ring clasp

79
Q

what makes up clasp assembly ex: RPA, RPI, RPC

A

rest, proximal plate, clasp type

80
Q

a patient is periodontally compromised and has endo treated teeth. what clasp system do you use ?

A

wrought wire

81
Q

what is RPD material made of

A

cobalt-chromium

82
Q

main reason why clasps break??

A

cold-working : mainupulating metal at ambient temperatures

83
Q

a secondary place is on what cusp?

A

fucntional cusp

84
Q

what are the 3 principles of tooth preparation

A

mechanical ( most important)
biologic
esthetic

85
Q

stopping removal of crown from sticky foods is called?

A

retention form ( removing along long axis)

86
Q

preventing removal of crown by horizontal, oblique, or apical forces

A

resistence form

87
Q

most operator control is by what?

A

tapering ( less tapering = better retetntion)

88
Q

minimum height or length of teeth

A

3 mm = incisors / pm

4mm= molars

89
Q

minimum ration of height to base:

90
Q

if you have short clinical crown, what to do for retention and resistance?

A

buccal grooves for retention

proximal grooves resistance

91
Q

for metal crown minum thickness for

non contact areas? margin?

A

non contact= 1 mm
margin= .5
contact= 1.5 ( occlusal of tooth)

92
Q

whats more important redcuction or clearnace ?

A

clearance !

both 1.5- 2

93
Q 
which margin has best seal?
featheredge
light chamfer
heavy chamfer
shoulder
A

featheredge

94
Q 
which margin for pfm crown
featheredge
light chamfer
heavy chamfer
shoulder
A

shoulder for porcelain

95
Q 
which margin for ACC crown
featheredge
light chamfer
heavy chamfer
shoulder
96
Q

1 lab complaint?

A

tooth underresduced so lab overbulks

97
Q

what is 3/4 7/8 crown and why used?

A

hybrid b/w onlay and crown and conserves tooth structure

98
Q

what type of occlusal point contacts do you want for occlusion in terms of size and shape?

A

broad

flat

99
Q 
which one requires enough VDO at least 2 mm 
hygeiene 
saddle/ridge lap
conical
modified ridge lap
100
Q 
which one should never be used due to bad hygiene
hygeiene 
saddle/ridge lap
conical
modified ridge lap
ovate
A

saddle/ ridgelap

101
Q 
which one has marginally better esthetic used for molars 
hygeiene 
saddle/ridge lap
conical
modified ridge lap
ovate
102
Q 
which one is used for anteriors ?
hygeiene 
saddle/ridge lap
conical
modified ridge lap
ovate
A

mod ridge lap

103
Q 
which one requires surgery and is best for ant esthetics 
hygeiene 
saddle/ridge lap
conical
modified ridge lap
ovate
104
Q

conenctor for PFM bridge should have a minum of __ mm height

105
Q

tissue manigment for fluid control. what is the medicine called?

A

atropine ( antisialagogues)

106
Q

chemical formula for viscostat and hemodent

A 
ALCl = hemodent
FeSO4= viscostat
107
Q

most inaccurate impression material?

A

irreversible hydrocolloid ( alginate)

108
Q

what is imbibition

A

absorption of water

109
Q

what is syneresis

A

loss of water

110
Q

impression with the best fine detail?

A

PVS ( addition silicone )

111
Q

GYPSUM is mines as ____ and manufactures as __

A

calcium-sulfate dihydrate 2H2O

calcium-sulfate hemihydrate 1/2 H20 ( hit got rid of some water)

112
Q

1, 2 ,3 ,4 ,5

which gypsum material is the best one ?

113
Q

1, 2 ,3 ,4 , 5

which gypsum material is used for impression (mounting) plaster?

114
Q

1, 2 ,3 ,4 ,5

which gypsum material is used for model plaster

115
Q

1, 2 ,3 ,4 ,5

which gypsum material is used for dental stone

116
Q

extra water needed to obtain workable mix of material?

A

gauging water

117
Q 
how water affects:
 strength
porosity
expansion
setting time
A 
more water: 
less strength
more orosity
less expansion
increased setting time
118
Q

best one) 1, 2 ,3 ,4 ,5

which gypsum material is used for mouth guards or essex retainers?

119
Q

least amount of expansion

1,2,3,4,5

A

4 (that is why it is thebest)

120
Q

How to decrease setting time qith:
water amount
water temperature
spatulation time

A

: hot water, less water, increased spatulation time

121
Q

what are 3 noble metals ?

A

GOld
Platinum
Palladum
SILVER PRECIOUS METAL NOT NOBLE!!

122
Q

which noble metal is tarnish resistant?
gold
platinum
palladium

123
Q

which noble metal incr strenth ?
Gold
platinum
palladium

A

platinum

palladium

124
Q

which noble metal increases melting temp
gold
platinum
palladium

125
Q

which metal causes greening of porcelain?

126
Q

what is high noble alloy made of?

A

> 60% noble, at least 40% gold

127
Q

what is noble alloy made of

A

> 25% noble

128
Q

base metal alloy made of?

A

<25% noble

129
Q

type 1 gold alloy example and composite of gold?

A

98-99% class V restorations only/ soft

130
Q

type 2 gold alloy example and gold percentage?

131
Q

type 3 gold example and percentage?

A

72%

crowns

132
Q

type 4 gold example and percentage?

A

69% RPD casting (STRONGEST !!!)

LESS GOLD= STRONGER

133
Q

the ability to resist fractures during compression is called what?

A

compressive strength

134
Q

abilitiy to resist fracture during pulling called?

A

tensile strength

135
Q

ability to resist fracture during bending

136
Q

what material has the best fracture toughness?

137
Q

prime example of material being very brittle?

A

Porcelain ( fractures easy without substantial dimension changes)

138
Q

what is ductility and what is a prime example?

A

wires

deforms under tensile strength (pulling)

139
Q

deforms easily under COMPRESSIVE strength

A

malleability

gold

140
Q

percentage elongation is the ability to be what? and what is an example

A

burnished

contact stress exceeds yield strength of material

GOLD

141
Q

order of greatest to least coeffecient of thermal expansion

A

Composite, metOl (amalgam), Tooth, cEramic

COTE

142
Q

which coefeccient of thermal expansion is closes t to tooth

gold, porcelain, amalgam, composite?

A

GOLD
gold = 14
tooth = 11.4

143
Q 
desirable mechanical properties :
yield strenth?
elastic modulus?
casting acuracY?
biologic compatibility?
CTE?
A
  • High yield strength ( does not permanently deform)
  • high elastic modulus: does not flex
  • casting accuracy: gold is more accurate than base metal
  • NI and BE allergies
  • CTE: closest. to tooth
144
Q

msot common dental metal alergy?

145
Q

best material for provisional?

A

Bis-acryl composite ( integrity)

146
Q

why cleaning provisional cement is imperative

A

Eugenol : inhibits polymerization of resin !!

147
Q

in order to bond porcelain to metal, what must be present ?

A

monomolecular oxidative layer !!!!

porcelan
oxide layer ( in middle)
Metal

148
Q

in order to bond porcelain to metal, what must be present to connect the 2 ?

A

monomolecular oxidative layer !!!!

porcelain
an oxide layer ( in middle)
Metal

149
Q

for occlusal contact, occlusal contact must be at least ___ mm away from porcelain-metal junction

150
Q

metal-ceramic failures:

cohesisve failures within ocide-oxide happens if what?

A

oxide layer TOO THICK

151
Q

adhesive failures in porcelain - metal is due to what?

A

oxide layer was not formed

152
Q

why do PFM bridges fracture easy?

A

porcelain low ductility

153
Q

for ACC CROWNS, glass infiltrated ceramics etched with what? and treated with what after?

A

HF acid !! ( not phosphoric)

Silane coupling

154
Q

zirconia crown, what material do you use ?

zinc oxide eugenol
Zinc Phosphate
 Zinc polycarboxylate
GI
RMGI
Resin cement
A

Luting Cement : RMGI , GI:

zirconia = ceramic with no glass

155
Q 
Porcelain veneer *** :
how much gingival third reduction?
facial reduction?
incisal reduction?
how deep into dentin?
A
  • .3 mm gingival third
  • .5 mm facial reduction
  • 1-2 mm incisal
    INTRA ENAMEL!! Not in dentin
156
Q

what is a maryland bridge? differnece from conventional bridge?

A

resin-bonded bridge

conventional bridge: more removal of tooth structure

157
Q

most important color system

value
hue
chroma

158
Q

saturation or intensity ?
hue
value
chroma

159
Q

color family?

hue
value
family

160
Q

lightness or darkness

hue
value
family

A

value

0- black
100- white

161
Q

color appears differnt under different lighting
metamerism
fluorescence
opalescence

A

metamerism

162
Q

light effect of a translucent material appearing blue and reflected red-orange in transmitted light
metamerism
fluorescence
opalescence

A

opalescence

163
Q

shade slection for :

middle third of crown
cervical third of crown
incisal third of crown

chroma, hue, value

A

value first
chroma second
hue lat

164
Q

when picking characterization alywas pick something with (high/low) amount of (value, chroma, hue)

A

HIGH VALUE!!!

can always add color and make darker but not the reverse

165
Q

for crown delivery what is the number 1 thing you check ??

A

shade (esthetics!)

166
Q

what type of bonding for temp crown?

zinc polycarboxylate
Zinc Phosphate
Zinc Oxide Eugenol
GI
RMGI
A

ZOE ( inhibirts polymerization of resin) temp cement

167
Q 
when putting on zirconia crown what do you use?
zinc polycarboxylate
Zinc Phosphate
Zinc Oxide Eugenol
GI
RMGI
168
Q

a zirconia crown uses what

zinc polycarboxylate
Zinc Phosphate
Zinc Oxide Eugenol
GI
RMGI
resin cement
A

GI/ or RMGI (LUTING CEMENTS)

luting: ceramcis with no glass

169
Q 
PGM or FMC uses what type of agent?
zinc polycarboxylate
Zinc Phosphate
Zinc Oxide Eugenol
GI
RMGI
A

GI/ RMGI

luting cement because luting for those without glass ceramics

170
Q

lithium disulcate (EMAX) uses what agent?

zinc polycarboxylate
Zinc Phosphate
Zinc Oxide Eugenol
GI
RMGI
Resin
A

Resin Cement: Rely X

bonds dentin, usd with cermaics with glass in them

171
Q 
ACC crown what used ?
zinc polycarboxylate
Zinc Phosphate
Zinc Oxide Eugenol
GI
RMGI
Cement
A

Resin Cement : rely X

remember etch with HF acid !!

172
Q

Lithium DIsilicate (emax) , Metal, Veneers (feldpathetic porcelain), Zirconia

which one is resin and which one is luting?

A

Resin: LIthium disilicate (emax) and Veneers (Feldpathetic)
there are chemical bonded to dentin

Luting: GI. or RMGI
Zirconia and Metal crowns

173
Q

when investing ) making negative by covering wax with investment material: ***

what is material used for
gypsum bonded investment?
Phosphate bonded investment
Silica bonded inviestment

A

gypsum bonded: gold
phosphate bonded: PFM
Silica bonded: base metal

174
Q

porosityof porcelain happens when what?

A

inadequate CONDENSING of porcelain

175
Q

porosity of acylic happens when?

A

too fast heating

176
Q

shrinkinkage porasity of metal happens when?

A

sprue too THIN prevents moleten metal from flowing into mold

177
Q

back pressure porosity of metal happens when?

A

sprue too SHORT

178
Q

what is the purpose of ditching the die?

A

expose the margin of prep

179
Q

what is the purpose of die spacer?

A

allows room for cement

mental dental (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions