Sweep 1

Question 1

Inlay

• Step 3: Taper all walls

Answer 1

2-5 degrees

Question 2

Primary retention features

of inlays are:

Answer 2

• The walls of isthmus and box

short walls-minimal taper long (tall) walls - more taper

Question 3

Primary resistance form of inlays are:

Answer 3

• Dovetail (2 surface inlay); box forms - Rounded internal line angles
• Adequate cusp thickness and
  dentin support

Question 4

2/3rds cusp tip the cutoff for

Answer 4

inlay vs onlay.

Question 5

Secondary flare is

Answer 5

40degrees at margin. You need to be able to burnish every margin.

Question 6

Cast metal inlay

Step 6: Gingival bevel

Answer 6

(0.5-1.0mm)

Question 7

Gingival retraction cord –

Answer 7

• widen sulcus
(0.5mm)
• improve visibility
to bevel

Question 8

Function of the Gingival Bevel

Answer 8

Increases strength of enamel • Improves margin seal

• Burnishability of margins

Question 9

Cast Metal Inlay – Gingival bevel

——– marginal metal

Answer 9

30- degree

Question 10

Cast metal inaly- occlusal bevel

Answer 10

40 degrees

Question 11

Cast metal inlay

steep cusps =

Answer 11

no bevel

Question 12

Additional retention

Answer 12

When opposing walls (primary retention) are short
– Dovetails (2 surface inlay e.g. MO inlay) – Grooves
– Slots

Question 13

Two Surface Inlays additional retention

Grooves

Answer 13

(0.3 mm deep) – sound dentin close to DEJ
– Adds to wall area
– Resists lateral

Grooves DO NOT cross DEJ!!!!!!!

Question 14

Grooves preferable to

Answer 14

slots/wells

Question 15

Slots or wells

Answer 15

–Help drive inlay toward axial during seating

– 2° resistance form

Question 16

Gingival seat

Answer 16

–Help drive inlay toward axial during seating

–2° resistance form

Question 17

Inlay -Cavosurface exit angle

Answer 17

90°

Question 18

Aesthetic inlays

-Greater taper than cast metal

Answer 18

6-10°

Question 19

Provisional for veneer:

Answer 19

2mm circle of enamel
35% - 37% phosphoric acid
No adhesive used Keep clean and dry

Add material to ESF, make sure they are all connected and trim intraorally.

Question 20

Veneers from lab are usually

Answer 20

etched. Look at intaglio surface - should be frosty.

Question 21

VENEER CEMENTATION PREPARING THE VENEER

Answer 21

Apply silane agent

• Silane acts as a coupling agent – forms a chemical bond that increases bond strength

Question 22

The primary source of retention with a porcelain veneer is \

Answer 22

mechanical

Question 23

• Silanes help resin

Answer 23

wet the entire surface and form a chemical bond

Question 24

Always clean up towards

Answer 24

gingiva, not incisally

Question 25

Place first veneer on the tooth and

Answer 25

vibrate (carefully and lightly) into position with a blunt instrument or light finger pressure

Question 26

Deeper preparations can result in

Answer 26

thicker porcelain Extra die spacer during fabrication More opacity in the ceramic to mask discoloration

Question 27

Light cured resin cement is recommended for veneers because of:

Answer 27

- the longer working time - thinner ceramics

Question 28

Use dual cured for:

Answer 28

- thicker ceramic restorations like crowns, inlays and onlays with limited light penetration

Question 29

Veneer | Try-in Paste

Answer 29

– Water soluble – Matches cement – Optical contact

Question 30

Veneer repair

Answer 30

Roughen the damaged margins of the veneer and tooth with fine diamond Bevel or chamfer the veneer edges Chairside Microetching (sandblasting) can also be effective

Question 31

Veneer repairs; | If the veneer is ceramic, the borders of the ceramic should be

Answer 31

etched with HF acid and rinsed thoroughly | For composites, this step is not necessary

Question 32

Veneer repairs Composite veneer:

Answer 32

Adhesive is applied to the composite veneer edges and the tooth prior to composite addition.

Question 33

Veneer repairs | For ceramic veneers:

Answer 33

the etched porcelain margins should be silanated before application of the adhesive and composite for the repair

Question 34

Beaching Non-vital (walking bleach) – potential problems There is a small chance

Answer 34

(1%) that internal bleaching can lead to root resorption

Question 35

Chemo-mechanical abrasion

Answer 35

6.6% HCl slurry –silicon carbide microparticles

Question 36

Smoothing sharp edges can

Answer 36

reduce chance of fractures

Question 37

Mandibular anterior veneers

Answer 37

More difficult to get adequate room • Can accelerate wear of opposing • In many cases they are not visible

Question 38

Indirect Porcelain Laminate Veneers | Advantages

Answer 38

– Laboratory controls contours – Appearance stable over time – Biomemetic (like the enamel they replace) – Veneering multiple teeth – Indirect veneers typically last much longer (evidence weak

Question 39

Window preparation

Answer 39

For teeth that require no shape modification – no incisal wear present

Question 40

Incisal lapping preparation | For teeth that

Answer 40

have extensive incisal wear and need considerable lengthening. Adds F-L retention form

Question 41

Butt-joint incisal preparation

Answer 41

For most teeth that need some insical modification due to wear

Question 42

No Prep Veneers

Answer 42

Teeth are inherently under-contoured, • Interdental spaces present • Open incisal embrasures are present, or when both conditions exist.

Question 43

Singlecycleoverload

Answer 43

– “unexpectedly bit on cherry pit or bone” (rare

Question 44

Cracks typically originate at

Answer 44

stress concentration areas | Internal line angles

Question 45

Clinical Tip: If one cusp is fractured, check

Answer 45

the other cusp for fracture line!

Question 46

Incidence of fracture in vital posterior teeth

Answer 46

70/1000 (Bader 2001)

Question 47

Fracture; | – Endo tx post teeth:

Answer 47

50-60% fracture MOD @ 7 yrs

Question 48

Feldspathic porcelain

Answer 48

(Older material, weaker, potential to fracture)

Question 49

 Pressed Glass-Ceramics

Answer 49

(Dicor, IPS Empress, etc) requires impression and wax pattern)

Question 50

 Lithium Disilicate

Answer 50

(IPS e.max press; IPS e.max CAD)

Question 51

 CAD/CAM

Answer 51

(Leucite-reinforced Glass Ceramics) (IPS Empress, Paradigm C), Feldspathic Glass (CEREC Blocs, Vitablocs Mark II), IPS e.max, Zirconia)

Question 52

 Laboratory processed Composite Restorations

Answer 52

(CAD/CAM Paradigm MZ100, Lava Ultimate 3M)

Question 53

Replacing and Protecting Cusps Missing cusps\Fractured cusps

Answer 53

Box extension Flat gingival floor Retain axial wall

Question 54

Rule of thumb:

Answer 54

greater than 1/2 (2/3) the inter-cuspal distance

Question 55

Cast metal onlay | Functionalcuspreduction –

Answer 55

1.5mm | – Multi-planar

Question 56

Cast Metal Onlay Non- Functional cusp | • Non-functionalcusp reduction

Answer 56

– 1.0 mm | – Multi-planar

Question 57

Aesthetic onlays | Non-functional cusps

Answer 57

1.5mm