E1

Question 1

Supragingival margin

Answer 1

Easily finished
Plaque free
Easier impression
Easier evaluation

Question 2

Subgingival margin

Answer 2

Esthetic
Associated with RPD
Root sensitivity 
Additional retention needed
Proximal contact area extends to gingival crest

Question 3

Retraction cord should be able to be below

Answer 3

Your margin without destroying the attached gingival connection

Question 4

Adequate reduction for

Answer 4

Tooth contours

Resist deformation

Question 5

Short the tooth the ____ taper

Answer 5

Less

Question 6

The bigger the tooth

Answer 6

The more retention the more surface area

Question 7

Sloped shoulder advantages

Answer 7

No metal collar

Less intrusion on gingival crevice

Simple lab construction

Question 8

Sloped should disadvantages

Answer 8

More difficult

Greater marginal creep

Rough marginal area

Potential gray line

Lab tends to over contour

Question 9

Shoulder Advantages

Answer 9

Optimism esthetics

Glazed porcelain at margin=less plaque

Margin need not be buried in crevice

Question 10

Porcelain butt margin absolute indications

Answer 10

Minimal sulcus depth of 1 mm or less

Thin labial tissue

High smile line

Question 11

Porcelain butt margin real indications

Answer 11

Margins in esthetic zone

Question 12

Shoulder disadvantage

Answer 12

Higher lab cost

More difficult lab procedure

More difficult preparation

Question 13

Ante’s law

Answer 13

Unwise to provide FPD when the root surface fare of the root of the abutment was less than the root surface area of the teeth being replaced

Question 14

Horizontal bone loss can be

Answer 14

Deceptive

-a little can result in considerable loss of bone support

Question 15

Retention has to be extended at a similar Distance from the axis of the primary abutment to the

Answer 15

distance of the lever arm that the Pontic exerts

Question 16

Ceramic

Answer 16

Product made from a nonmetallic inorganic material processed by firing at high temperature to achieve diesrable properties

Question 17

What dental ceramic group is used for denture teeth and porcelain jacket crown

Answer 17

High fusion

Medium fusion

Question 18

What dental ceramic group is used for metal ceramic crowns

Answer 18

Low fusion

Ultra low fusion

Question 19

Feldspar

Answer 19

A naturally occurring glass that contains silica fluxes and alumina all neatly bound together

Binds all 3 clay bodies together once its been fused

Question 20

Dental porcelain compostion

Answer 20

Feldspar

Quartz

Other oxides

Question 21

Dental porcelain are heated at high temps and then ______ which causes _____

Answer 21

Cooled rapidly

The glassy matrix to fracture into many small fragments causing what is called a Frit

Question 22

Vitrification

Answer 22

Turing crystalline silic along with associated fluxes and modifiers into glass

Question 23

Porcelain can be defines as a highly _______

Answer 23

Vitrified ceramic body

Question 24

A ceramic body includes both a ______ structure as well as _____ which is infiltrated between the particles

Answer 24

Refractory skeletal structure

Feldspathic glass

Question 25

Refractory skeletal structure retains it shape though ______ and _____

Answer 25

Sintering Fusing process

Question 26

Porcelain is not simply a form of glass it is

Answer 26

Glass with a refractory internal structure

Question 27

Opaque porcelain

Answer 27

Contains opcifying oxides

Question 28

Body or dentin porcelain

Answer 28

Is translucent and contains metallic oxides that give the shade or base color selected

Question 29

Incisal or enamel porcelain is

Answer 29

More translucent than the body

Question 30

Different porcelain powders are mixed with

Answer 30

A water based glycerin containing liquid to form a a paste

Question 31

Porcelain shrinkage

Answer 31

30%?

Question 32

Shimstock

Answer 32

.015 mm

Question 33

Accu film articulating paper

Answer 33

.017 mm

Question 34

Porcelain labial margin fribraction 3 ways

Answer 34

Platinum foil matrix technique Porcelain wax technique Direct lift technique

Question 35

Direct Lift Technique

Answer 35

Apply shoulder porcelain on margin and dry with tissue paper and brush excess with large brush

Question 36

Direct lift Advantage

Answer 36

Least time consuming

Question 37

Direct lift disadvantages

Answer 37

Shoulder porcelain needed Slightly rough margins

Question 38

Framework Design goals

Answer 38

Even thickness of porcelain Proper porcelain metal interface Good connector design Optimally placed occlusal contacts

Question 39

Glass will adhere to Clean gas free metal if

Answer 39

covered with adherent oxide and tempered raised where oxide is partially dissolves into glass

Question 40

Adhesive failure at porcelain metal interface

Answer 40

Oxide layer missing

Question 41

Adhesive failure at metal oxide metal interface

Answer 41

contaminated metal

Question 42

Adhesive failure at porcelain metal oxide interface

Answer 42

Contaminated metal oxide

Question 43

Cohesive failure in porcelain

Answer 43

Maxim strenght

Question 44

Cohesive failure in metal oxide

Answer 44

Excessive oxidation

Question 45

Cohesive failur in metal

Answer 45

Doesn’t happen

Question 46

____ mm from junction of excursive path

Answer 46

1.5

Question 47

It is preferred to have opposing ________ contact metal

Answer 47

Natural tooth

Question 48

centric stops should be located ____ from the metal ceramic junction to prevent ____

Answer 48

1.5 mm Porcelain fracture from deformation of the metal

Question 49

If the vertical overlap must be minimal then

Answer 49

Ceramic against ceramic will produce the least wear

Question 50

Metal extended to incisal edge for metal fleuxre will cause

Answer 50

Porcelain fracture

Question 51

Connector size

Answer 51

2.5 x 2.5

Question 52

Attachments should be surrounded by at least ____ of metal to prevent ______ in Function

Answer 52

1 mm Flexure

Question 53

Porcelain is strong in ____ and weak in

Answer 53

Compression Tension

Question 54

Porcelain poor tension means

Answer 54

Bad shear

Question 55

Porcelain metal junction should be

Answer 55

A butt joint of 90 degrees or greater

Question 56

The coping must be approximately _____thick

Answer 56

.5 mm But Mary be thicker to support porcelain

Question 57

Where can interporximal contact be

Answer 57

Metal or porcelain

Question 58

Casting margins

Answer 58

10 micrometers

Question 59

Porcelain margins

Answer 59

50 micrometers

Question 60

Least conservative prep

Answer 60

Mcc

Question 61

Metal ceramics appearance can be improved by

Answer 61

Omitting metal shoulder and replacing with porcelain