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Flashcards in Fixed Q3 Deck (232):
1

The combined width of Connective Tissue and Junctional Epithelial attachment formed adjacent to a tooth and superior to the crestal bone.

Biological Width

2

From top to bottom: 1mm

1mm

1mm

Gingival sulcus (pocket depth)

Junctional Epithelium

Connective Tissue attachment

3

T/F
Biological width can vary from pt to pt

True

4

How do you measure Biological Width?

Sound to Bone

(subtract sulcus depth)

***done under anesthesia

5

If a crown prep does not follow soft tissue contour what might happen?

Violation of Biological Width by Crown Margin

6

If a crown margin is placed within the Junctional Epithelium or Connective tissue what has occurred?

Violation of Biological Width

7

2 Things happen if you violate Biological Width:

Inflammation

Bone Loss

*body will try to re-establish Bio Width

8

What defines the bone loss in the case of an Iatrogenic violation of Biological Width?

Uncontrolled/unpredictable

9

Where is unpredictable/uncontrolled bone loss more likely to occur in the case of Bio Width violation?

Thin Alveolar Bone

10

What plays a major iatrogenic role in the recession of bone around thin areas?

Trauma from restorative procedures

*like BioWidth violation

11

What are 2 factors inherent in the Pt that affect the outcome of iatrogenic trauma to the BioWidth?

If Gingiva Thick/Fibrotic or Thin/Fragile

Peridontium Scalloped or Flat

12

What type of gingiva is more prone to recession?

What type is less prone?

Highly scalloped thin

Thick and Fibrous

13

What factor correlates to the Thickness of the Alveolar Bone?

Gingival Biotype

*thin gingiva = thin alveolar bone
*thick gingiva = thick alveolar bone

14

What is the simplest way to determine Gingival Biotype?

Metal Perio probe in the Sulcus

*if thin, probe visible through gingiva

15

T/F
Thin biotype is more likely to recede, and is correlated to a highly scalloped gingiva

True

16

What are the 2 ways to treat a Violation of BioWidth?

Orthodontic Extrusion

Crown Lengthening

17

When a tooth is extruded via orthodontics to move the margin out of the the BioWidth, what is often indicated?

New Restoration

18

What is the advantage to Crown Lengthening procedure as opposed to letting the bone loss resolve on its own?

Healing process of Crown Lengthening very predictable

*may lose more bone than you want if you let it resolve on its own

19

Crown lengthening is a ____ method

Subtractive

20

T/F
The re-establishment of health in a crown lengthening is predictable

Not treating BioWidth invasion may lead to unpredictable bone loss

True

True

21

Average distance from the Bone to the height of the FGG? (not interproximal)

Height from bone to soft tissue Scallop? (interproximal)

3 mm

4.5 mm

22

Papillary height is established by what 3 things?

Level of bone

Biological width

Form of the Gingival Embrasure

23

T/F
Changes in the form of an embrasure can impact the height and form of the papilla

True

24

The tip of the papilla behaves differently than the FGG on what aspect of the tooth?

Facial

25

The FGG averages 3 mm above the facial alveolar bone, but the tip of the papilla averages _____ above the interproximal bone

4.5 - 5 mm

26

If the papilla is further away from the alveolar bone on the facial interproximal side but but has the same BioWidth as the rest of the surface, what must be deeper?

Sulcus

*1 - 1.5 mm deeper

27

If the measurement is ___ to ____ mm, there is a full papilla

3 - 5

28

Who studied the relationship between the papilla and interproximal contact to the underlying bone to establish papillary height above bone?

Tarnow et al

29

When the interproximal contacts are _____ mm or less (to the alveolar bone), papilla always fill the space

5 mm

30

If the interproximal contact point is 6 mm above the alveolar bone, ____ % of the time the papilla fills the space

56%

31

If the interproximal contact point is 7 mm above the alveolar bone ______% of the time the papilla will fill the space

37%

32

T/F
On average females have a higher smile line

True

33

Maxillary incisal edge display at rest does what with age

Mandibular?

Decreases

Increases

34

What sex has a greater incisal edge display at rest?

Females

35

What do people notice about midline shift and cant?

Midline shift - no one notices

Cant - everyone notices

36

T/F
Cant isn't as important as dental midline

False

37

How far does a midline shift have to deviate before Orthodontists notice?

Everyone notices a ___mm incisor crown angulation

4 mm

2 mm

38

Anterior preparations have how much of an incisal reduction?

2 mm

39

Integrity is what kind of material?

PMMA?

Bis-acryl

Poly methyl methacrylate

40

PMMA goes through what kind of reaction?

steps?

Polymerization rxn

initiation, propagation, termination

41

Acrylics can be classified by their activation (initiation), which can be what 3 things?

Heat

Chemical

Light (400-500 wavelength) = camphroquinone

42

For PEMA (SNAP), what is the Initiator found in the Powder?

What is the Activator found in the Liquid?

Benzoyl Peroxide

Tertiary amine

43

PEMA =

PMMA =

Which is SNAP?

Poly ethyl methacrylate (SNAP)

Poly methyl methacrylate (Jet)

44

PEMA vs PMMA - which one heats up more?

What is it called?

PMMA - may traumatize pulp

Jet acrylic

45

PEMA and PMMA are both chemically activated

True

*by a Tertiary Amine

46

What is the main advantage to working with PEMA (SNAP) over PMMA (Jet)?

Low curing heat

47

What is Triad activated by?

What is the Initiator?

Light (400-500 nm)

Camphorquinone

48

T/F
Triad is activated by heat

False

*Light 400-500 nm

49

Polyvinyl siloxane can go through a _____ rxn whose byproduct is ______

Condensation

Ethanol

50

PVS that goes through a condensation rxn (2 types of putty squished together) has what advantage over condensation silicone impression materials?

Less polymerization shrinkage

*highly filled

51

3 reasons for a beveled shoulder:

bend or burnish metal margin to tooth

minimize marginal discrepancy if crown doesn't seat completely

Protect chipping (by removing unsupported enamel)

52

A Heavy Chamfer is also referred to as a ________ and is achieved with the ________ bur

Deep Chamfer

856.025

53

T/F
Sharp corners are more prone to impression voids

True

54

For adequate resistance form, how high should Anterior preps be?

Posterior?

3 mm axial wall height

4 mm

55

Teeth that have greater than ____ height to base ratio will have adequate resistance form

0.4

56

3 general esthetic considerations to keep in mind for All Ceramic restorations?

Pink framing

Shade

Translucency

57

When would metal show through a Metal-Ceramic restoration?

If prep too thin (so porcelain too thin)

58

T/F
A metal to porcelain (ceramic) crown is one of the Least conservative restorations available to the dental profession

True

59

A metal-porcelain crown will often look like what on the gingival border? (PFM)

What might prevent this?

Gray

New labial designs moving metal margin away from gingiva

60

3 indications for use of an all Ceramic restoration?

Single crown

High Esthetic demand

Metal allergy

61

T/F
Metal allergy includes those pts that can't wear metal jewelry - must ask the pt before Tx planning

True

62

T/F
An all ceramic is basically an all glass restoration, and most people are high Esthetic demand pts

True

63

All ceramic restorations - 4 Patient Selection Criteria:

Optimal Esthetics required and ACHIEVABLE

ideal prep

favorable occlusion

compatible opposing dentition

64

6 important properties of Ceramic Materials:

Translucent

Chemically stable

Fluorescent

Biocompatible

High compression resistance

CTE (coefficient of thermal expansion) similar to natural tooth

65

Advantages to Ceramic Crowns: Excellent ______

Good peripheral blend of _____

Luting material not _____ in oral fluids

_______ margins

Soft tissue _______

esthetics

shade

soluble

Supra-gingival

compatibility

66

T/F
PFM is not translucent, whilst all ceramic is

True

67

With some dark teeth, what can be used to mask the dark dentin?

Zirconia

68

Ceramics have less irritation/inflammation at the margins compared to metals

True

69

T/F
All ceramics have enhanced esthetics b/c of no metal and improved light transmission

True

70

All ceramics are most beneficial for those teeth that have what colored dentin?

If dentin is dark, use what?

Normal

Zirconia

71

T/F
Facial tooth reduction isn't as much using all ceramics (supra gingival)

True

72

T/F
ACC's can be technique sensitive and there is a time consuming luting procedure

True

73

T/F
ACC's can be brittle, fragile to occlusal adjustment, and have a lack of repair ability (if fracture, that's it)

True

74

What might cause gingival irritation in an ACC?

Where would you not use an ACC?

rough margins - easy to do

molars - greater potential for fracture (Empress)

75

Contraindications for ACC's include compromised teeth, bad habits, occlusal interferences, difficulty isolating, and if the margin is where?

Sub-gingival

*not possible especially if restoring using resin cement

76

What are 2 Major problems with ACC's?

Brittle - a flaw will propagate along crack

Abrasive to opposing tooth

77

The higher the _____ concentration of an ACC, the more wear there is

Leucite

78

2 General ways to classify dental ceramics:

Composition

Lab processing

79

3 Types of ceramics (by composition):

Glass - looks great

Glass infiltrated (particle filled glass) - stronger

Polycrystaline - almost like metal

80

Glass ceramics are highly esthetic and best at mimicking what?

Optical properties of enamel/dentin

81

An example of a glass ceramic:

Feldspathic porcelain

82

Glass infiltrated ceramics (particle-filled glass) have what in them that improves their mechanical properties?

Filler particles

83

3 examples of the filler material in Glass infiltrated ceramics?

alumina

magnesia-alumina

alumina-zirconia

84

Polycrystalline materials have increased what?

Reduced what?

and No what?

strength

translucency

glassy components

85

What is the only way to process Polycrystalline ceramics into shapes?

computer-assisted machining

86

2 Examples of Polycrystalline ceramics?

Cercon Base

DC-Zirkon

87

Where are Glassy materials most often used? (weak, translucent)

Particle-filled glass?

Polycrystalline?

Anteriors

Anteriors/posteriors

Posteriors (some anteriors)

88

3 Glassy materials:

3 Particle filled glasses:

4 Polycrystalline:

feldspathic, VMK95, Initial

In-Ceram, Empress I/II, E max

Lava, Everest, Cercon, Procera

89

Classification of ceramics according to Laboratory processing (4 ways)

Sintered conventional powder-slurry

Castable/Pressable

Machinable

Infiltrated

90

What is the traditional method of fabricating an ACC?

Powder condensation

*moist brush, compact, vacuum firing

91

Ceramics made by what technique are translucent and esthetic, used mostly for veneering layers

Powder condensation

92

What ceramic is used with an Aluminous Core w/ a platinum matrix heated to drive off dissolved gases and a core porcelain build up?

Conventional Powder-Slurry

93

Powder-Liquid ceramics have great translucency and can be as thin as _____ mm

0.2 mm

94

T/F
Dual cures can change colors, so if you want a highly translucent product use a light cure

True

*zirconia = dual cure

95

When was the Porcelain Jacket Crown developed?

Aluminous Porcelain Jacket Crown?

1800's

1965 - aluminous oxide strengthened

96

What is stronger than the Powder Liquid ceramic?

2 examples:

Pressed ceramic

IPS Empress, IPS Empress 2

97

Y-TZP is an example of what?

Polycrystalline ceramic matl

*YTTRIUM Tetragonal Zirconia Polycrystals

98

2 All ceramic products that can be used in Press Technology or CAD/CAM technology?

IPS Empress

IPS E max

99

Leucite can be a filler for what?

Lithium disilicate, alumina spinel, and zirconia can be a filler for what?

High glass content

Low glass content

100

No glass content (polycrystalline) can be what 2 matls?

alumina

zirconia

101

What IPS matl is Leucite Glass Ceramic, low flexural strength?

IPS Empress Esthetic

*looks really good - highly translucent

102

What is the Improvement over IPS Empress Esthetic with increases strength, higher flexural strength, and in monochromatic?

Empress 2 (pressed ceramic)

103

IPS Empress Esthetic is what matl?

Empress 2 is what matl?

IPS E max?

Leucite glass

disilicate glass

Lithium-disilicate

104

IPS E max press (Ivoclar Vivadent) was introduced in 05 and uses what type of cement?

Resin cement

105

IPS E max has better physical properties and improved esthetics

True

106

What high strength ceramic with a superior marginal fit has 2 fabrication methods and must be bonded?

Pressed

107

Under or Over etching will do what to bond strength?

Decrease

108

T/F
HF acid has better bonding properties than phosphoric

True

109

What creates a bond between the HF etched teeth and an ACC?

Monobond-S

110

With IPS Empress, when should you adjust occlusion?

After bonding

111

IPS Empress is very esthetic and translucent and must be ______ to the tooth

However, it is relatively ______ and ______

*use for esthetic restoration

bonded

weak, expensive

112

Lithium disilicate, titanium, zirconium, alumina, inflitrated Al/Zr, glass ceramics, composite, and castable plastic are used for what?

CAD/CAM matls

113

The Alumina CAD/CAM matl is known as what?

Procera

114

T/F
Procera crowns are digitized and emailed to Sweden or NJ

True

115

What type of cement is used for Zirconia or Crystalline crowns?

Glassionomer

*no need for translucency

116

What type of cement is used if you need translucency?

Resin (acid etch then bond)

*more difficult to use

117

Any substructure =

coping

118

What is the strongest laminate w/ great esthetics on the market?

(must be bonded - translucent - resin)

Procera Laminate

119

Procera AllCeram system using glass free high strength ceramic core, used ant/post, CAD/CAM

Densely sintered high-purity Aluminum Oxide

120

Aluminum Oxide sinters at _____degrees C

___% shrinkage upon sintering

1650

20%

***remember, Aluminum Oxide = Procera

121

In the Procera system why is the die enlarged?

Compensates for sintering shrinkage

122

Review: Glass powder liquid

Pressor matls (2):

CAD/CAM =

Empress, Emax

CAD/CAM

123

What is the strongest matl (but not very esthetic)?

Zirconia system

124

What type of cement do you use with Zirconia?

Conventional cement

125

T/F
Removing Zirconia is easy

False

*very strong

126

How is Zirconia cured?

Dual

*as opposed to light

127

What product cleans after try-in of pretreated restoration?

What is the universal Restorative Primer? Applied for _____ secs then air dried

Next step?

***then?

Ivoclean

Monobond Plus, 60 seconds

Cement into restoration (dual cure)

***then seat, clean up, and Final Cure 20 secs/side

128

IPS Empress, when adjust Occlusion?

Zirconia, when adjust Occlusion?

After bonding

Before bonding (high strength means cracks won't go further)

129

Glass Ceramics used in Anteriors for forces of ____ N

Alumina used on Premolars for forces of _____ N

Metal ceramics, zirconia, and gold (3M) are used in the Molars for forces of ____ N

150

300

400-800

130

7 ACC matls from least to highest strength

Feldspathic porcelain

IPS Empress

IPS E max

In-ceram Alumina

In-ceram Zirconia

Alumina (Procera)

Zirconia (Cercon, LAVA)

131

Incisal reduction for ACC:

The rest:

1.5 mm

1 - 1.2mm axial, 1.0 mm marginal

132

2 systems to describe color:

Munsell (hue, chroma, value)

CIELAB

133

Visible light spectrum:

380-750 nm (violet - red)

134

Northern-exposure sunlight in the middle of the day that is slightly overcast.

Standard daylight

(or northern daylight)

135

The reproducing capacity of artificial light to mimic natural daylight is measured by what 3 things?

color temperature

spectral reflectance curves

CRI- color rendering index

136

The CRI is on a scale of 0-100 and indicates what?

color rendering of artificial light source

(compared to standard Northern Daylight)

137

Incandescent lights emit higher concentrations of _____ light waves and has what CRI?

Fluorescent lights emit higher concentrations of _____ waves, has what CRI?

Yellow, low CRI

Blue, 50-80 CRI

138

T/F
Incandescent and Fluorescent lights are suitable for shad matching

False

139

What type of artificial light provides the best color matching?

Can these be used alone?

Color corrected fluorescent lamps w/ CRI over 90

Should use multiple sources

140

What is the phenomenon when objects match color under one light source but not another?

Metamerism

141

Dental offices should use color corrected lights and others for shade matching

True

142

What 2 types of lighting are commonly used in the home and office and should be used to match shade (along with color corrected source)?

Incandescent

cool white fluorescent

143

T/F
Shade match with the dental operating light

False

*only use ambient lighting

144

T/F
A CRI of around 90 should be used to shade match

True

145

What 3 factors determine color?

Hue

Chroma

Value

146

3 primary subtractive colors

Blue

Red

Yellow

147

What are the primary Additive Colors?

Red

Blue

Green

148

Hue:

Chroma:

Value:

color (determined by wavelength)

color intensity (saturation)

light from dark (black and white grayscale)

149

What is the most important factor in color?

Value

150

Value is measured on a scale from _______

0 - 10

151

What is a common color matching mistake in metal-ceramic prosth?

Restoration too high in Value

152

T/F
Objects of different chroma/hue can have the same value

True

153

CIELAB is better than Munsell and distinguishes color space by what 3 coordinates?

L

a

b

154

In CIELAB, L =

a =

b =

lightness

red-purple/blue-green axis

yellow/purple-blue axis

155

L, a, and b correspond to Munsell's Hue and Chroma

False

156

What in the eye interprets brightness?

What interprets color?

Rods (no color)

cones (only active under high lighting conditions)

157

Rods are used for _____ vision

Cones are used for ______ vision

Scotopic

Photopic

158

Rods have highest concentration where?

Cones?

peripheral retina

central retina

*remember, rods for brightness, cones for color

159

Because color vision decreases rapidly, what should you look at between shade matching to restore color vision?

Pale blue or Gray surface

160

When should the color be matched during an appointment?

Beginning

*tooth still hydrated - take off lipstick, try to have neutral background colors

161

What is the best background to use for color matching?

N7 - N9 gray

*high value pastels also recommended

162

The portion of the ceiling not occupied by lighting should be what value?

Large vertical surfaces?

9 or more

8 or more

*also, avoid high gloss

163

Color blindness affects what % males?

Females?

8%

0.5%

164

3 types of color blindness:

Achromatism - no hue

Dichromatism - 2 primary hues

Anomalous Trichromatism - all 3 hues, but retinal cones affect one primary pigment

165

How long should you wait after bleaching to match color for a crown?

10 days

166

3 types of commercial shade guides:

Vita classic

Vitapan 3D master

Extended Range Shade Guides

167

What does A3 mean in the Vita Classic shade guide?

A - red-yellow

3 - chroma

168

Vita Classic shade guide colors A:

B

C

D

red-yellow

yellow

grey

red-yellow-gray

169

Vita Classic shade guide sequence for shade match (4 steps):

Hue (A, B, C, D)

Chroma

Value

Final check, revision

170

How is value best determined?

squinting @ arms length

*increases rod sensitivity

171

Would it be better to err on high value or low?

High

*low can't be stained up in value

172

Trying to increase value through staining will increase what?

Decrease what?

opacity

light transmission

173

What shade guide starts with the Value?

Vitapan 3D master

174

4 steps with Vitapan 3D master?

Value

Chroma

Hue

Final check/revision

175

T/F
Extended range shade guides will cover bleached, dentin, and custom shades

True

176

What 2 materials, when preparing for an ACC, would need a Stump Guide?

(match dentin)

Feldspathic porcelain

IPS Empress

177

T/F
Stains increase surface reflections and prevent light from being transmitted through porcelain

True

178

When a tooth is divided into 3 regions w/ 9 segments:

Shad mapping

179

3 types of color measuring instruments:

Spectrophotometers

Spectroradiometers

Colorimeters

180

A standardized image capture environment for shade matching using a full spectrum 7 band LED light

Crystaleye

181

What is the default sequence at ASDOH for preparation of the tooth for a crown?

build up first

preparation

182

A crown prep followed by a build up has what disadvantage?

temporize is difficult if non-restorable

183

Amalgam, composite, and Glassionomer can all be used to build up a crown

True

184

What is the dual cure composite material for crown build up?

Paracore

185

Tooth in tooth relationship

MIP - max. Intercuspal position

186

CR (centric relation) definition:

Condyles in most Anterior/Superior

187

90% of people in MIP...

Are not in CR

188

MIP = CR

10%

189

MIP:

CR:

Centric Occlusion:

Max intercuspal position

Centric Relation (condylar)


Where the teeth touch first

190

When would you restore the arch so MIP = CR

Teeth ground down

Endentulous

Full arch/mouth rehab

191

If MIP and CR differ, there is a ______ to _______ slide

Centric Occlusion (where teeth meet first)

MIP

192

If MIP and CR differ greatly, the resulting CO to MIP slide can result in what?

Parafunction

193

The complete intercuspation of opposing teeth INDEPENDENT of condylar position

MIP

*he writes it as 'maximum intercuspation position'

194

Centric Relation is independent of what?

MIP and tooth contact

195

The maxillomandibular relationship, condyles most Anterior and Superior, articulating with the thinnest avascular portion of the disk

Centric Relation

196

In Centric Relation, the condyles articulate with what?

They are in what position against the articular eminence?

Thinnest avascular portion of disc

most Anterior and Superior position

197

T/F
Centric Relation depends on tooth contact

False

198

What type of movement is allowed when in Centric Relation?

Rotational

*any translation will get you out of CR

199

CR, aka...

Terminal hinge axis

200

Measured between the incisal edges, how far can CR rotate before translation occurs?

20-25 mm

201

After 20-25 mm of CR rotation (measured incisally), what ligament tightens?

What direction do the condyles translate?

TemporoMandibular Ligament


Anterior and Inferior

202

The occlusion of opposing teeth when the mandible is in Centric Relation:

Centric Occlusion

203

Centric Occlusion is normally found where?

Posterior teeth

204

A slide from CR to MIP is present in ____% of the population.

Average distance of slide:

90%

1 - 1.25 mm

205

If the occlusion is stable, prosthetics are mounted in relation to what?

MIP

*existing occlusal scheme - most fall into this category

206

If you want to perform an occlusal equilibration how should you mount the case?

Centric Relation

207

A theory is that Interferences between what creates neuromuscular disharmony, resulting in parafunctional activity?

CO and MIP

208

Unrestricted movement between CO and MIP is considered ideal when?

If there's no change in Vertical Dimension

209

T/F
The majority of cases can be restored to the pt's MIP

True

210

What are 2 common reasons to mount a case in CR?

No MIP - endendulous, full arch prep

CR to MIP slide interference

211

Prep paramaters in CEREC are determined by what?


(2 things)

Material properties

Manufacturing process

212

CEREC prep minimum shoulder thickness:

min. axial wall:

min. thickness under fissure:

min. thickness under cusp (ant/post):

1.0 mm

1.5 mm

1.5 - 2.0 mm

1.5 (anterior) 2.0 (posterior)

213

3 aspects important to evaluate when acquiring an image:

distinct separation from adjacent teeth

all margins clearly visible

even amount of shadowing on adjacent teeth

214

What are 2 ways to fix CEREC crowns to teeth?

(each has 2 names)

Cementation (luting)

Bonding (resin)

215

What are the pros/cons to Luting a CEREC crown?
(cementation)

Cleans easily, no anesthesia, fast

Doesn't increase restoration strength, dependent on surface area, can't use w/ all matls

216

Pros/Cons of Bonding (resin):

Strong w/ enamel, strengthens matl, good esthetics, don't need retention features in prep

Isolation needed, not predictable, needs anesthesia, difficult clean up, technique/time

217

When placing a crown clean the tooth with what?

Next 5 steps:

*last step allowed to react for how long?

Proxyt fluoride-free paste

try on

Etch (5% hydrofluoric acid)

rinse

dry

Monobond Plus *60 secs

218

For Luting (cementation) use what conditioner?

Rins with water then dry (what is important here?)

Coat inside restoration, seat - what's the working time?

Remove excess cement w/ scaler when?

Finishing can be started how long after seating?

GC Fuji Plus conditioner

don't dessicate

2 min 15 secs

rubbery

4 min 30 secs

219

What Resin Cement Bonding do we use?

Maxcem Elite

220

Maxcem Elite - should do what after seating?

light cure 2-3 secs to achieve gel state

221

After light curing Maxcem Elite for 2-3 secs to achieve gel state and after excess cement has been cleaned off, light cure all surfaces for how long?

For metal based/opaque restorations, let set for how long after seating

10 seconds

4 minutes

222

What duplicates the anterior guidance of a patient?

*thereby reproducing excursive movements

Custom Incisal Guide Table

223

When would a custom incisal guide table be indicated?

When pt's existing anterior guidance is acceptable

224

If the pt's existing anterior guidance is UNacceptable, what 5 steps should be taken?

Diagnostic wax up

Provisional restorations (adjust intraorally)

Impression

Cast

Mount on Articulator

225

When does a Custom Incisal Guide Table need to be used?

If one/more guiding teeth are prepared

*and want to preserve guidance

226

What matl is used for a Custom Incisal Guide Table?

Setting time?

DuraLay - chemically activated PMMA

5 minutes

227

A retention groove effectively does what?

Increases H/B ratio

228

T/F
A CEREC prep should have smooth flowing transitions and a sharp cavo surface

True

229

How will CEREC mill if there is a sharp jump in the margin?

Under mill - won't seat

230

T/F
High noble metals are more Castable

True

231

Term for how tight a crown fits onto a preparation:

(less rotational movement)

Adaptation

232

What 2 types of crowns have a better adaptation than a Milled Crown?

Pressed

Casted

Decks in Tim's Cards Class (140):