CEREC and final

Question 1

how can you always find your omni file

Answer 1

1. your name
2. faculty – as dentist
3. patient record for ID

Question 2

can you use USB with cerec omni?

Answer 2

NO.

Question 3

can you access your files in any unit or computer?

Answer 3

yes

Question 4

typical work flow with unprepped tooth

Answer 4

likely 2 appointments
appointment 1 –> prep and temp

between –> meet with faculty to design

appointment 2 –> try in crown and bond with multilink

Question 5

typical workflow from prepped tooth

Answer 5

*single day with two sessions - but requires that you prepped and temped on previous day

session 1 – finalize prep, perio re-eval, scan and design

session 2 – mill, try in restoration, bond with multi-link

Question 6

list of materials to mill

Answer 6

1. vita mark II block
2. vita enamic
3. ivoclar - E-max
4. celtra duo

Question 7

vita mark II block
material?
location of use?

Answer 7

Feldspathic porcelain

pre-molars, anterior teeth

Question 8

vita enamic
material?
location of use?

Answer 8

porcelain / composite

use - inlays, onlays

Question 9

ivoclar E-max
material?
location of use?

Answer 9

lithium dislicate

molars, anterior teeth

Question 10

celtra duo
material?
location of use?

Answer 10

lithium silicate

pre-molars

Question 11

get blocks where?

Answer 11

go to 6ht floor window and fill out appropriate form and have the form signed by your faculty

Question 12

etching of enamic

Answer 12

60 seconds with 5% HF

30 seconds with 9.6% HF

Question 13

etching Mark II blocks

Answer 13

30 seconds with 9.6 HF

Question 14

etching celtra duo

Answer 14

30 seconds with 9.6%

Question 15

etching emax

Answer 15

20 seconds with 5% HF or 15 seconds with 9.6%

Question 16

checking occlusion and there is a mark on #19 on buccal inclines of lingual cusp?

Answer 16

this is a working side interference

Question 17

advantages of PVS

Answer 17

can use multiple pours

NOT removed easily, NO to waiting 45 minutes to pour

Question 18

advantages of reversible hydrocolloid

Answer 18

1. cheap
2. hydrophilic

not strength and not accuracy

Question 19

situations to use block temp

Answer 19

all really

Question 20

ovate pontic use?

Answer 20

not for all situations – but it IS THE MOST ESTHETIC

Question 21

what can you use for occlusal registration for mounting die mold

Answer 21

1. beauty wax
2. PVS
3. Polyether
4. Duralay

Question 22

function of 2 pins in die?

Answer 22

anti-rotation

Antirotation-yes
Facilitates seating?
Orienting die?
Retention??

Question 23

what will prevent clinically successful margins?

Answer 23

unsupported enamel

Question 24

Which of these impede seating of a prefabricated polycarbonate crowns before relining

Answer 24

Margins hit tooth- yes
Contacts interfering-yes
Internal surface hitting-yes
Occlusion-no

Question 25

Die not seating in model entirely what will happen to the restoration?

Answer 25

Hyperocclusion

Question 26

casting not fitting on die what to do

Answer 26

re-wax and re-cast

Question 27

Crown does not fit what will you check first

Answer 27

contacts

Question 28

casting does noit fit on die model - what could the problem be?

Answer 28

internal surface

Question 29

T/F you can decrease value of a crown by external staining

Answer 29

False - you cannot

Question 30

T/F you can decrease value of a crown by external staining

Answer 30

False - you cannot

Question 31

Metamerism can be minimized by and pt satisfaction and esthetics can be increased by

Answer 31

Matching/selecting shade in different lights-yes
Correct shape of restoration-yes
Highly polish it-no

Question 32

cases needing occlusal registration to mount

Answer 32

Missing #17, 18  need registration b/c lack of posterior teeth  inable to articulate properly
Missing # 19,20  NO need for registration b/c enough information to relate models

Question 33

incisal reduction for pfm crown

Answer 33

1.5 - 2 mm

Question 34

disadvantages of pfm over gold

Answer 34

less concervative

fractures more

abrades teeth more

Question 35

T/F you should start the block temp before makingthe final impression

Answer 35

True

Question 36

19 mark on the lingual incline of the buccal cusp?

Answer 36

non-working interference

Question 37

a good impression for a single crown should include?

Answer 37

1. prepped tooth
2. unprepped tooth
3. margins
4. some neighboring tooth structure

Question 38

tool to help pouring impressions

Answer 38

number 7 spatula – NOT a brush

Question 39

grind the base?

Answer 39

NO - never because our pins are here and can distort them

Question 40

after have die what do we apply and why?

Answer 40

material that will act as spacer for the cement later on

Question 41

function of die spacer

Answer 41

space for the cement

Question 42

after add wax then what?

Answer 42

screw to be able to flow the material you will be using into

Question 43

types of expansion we may get

Answer 43

1. normal setting expansion (in material)
2. hydroscropic (related to water)
3. thermal expansion
   - when burn out pattern (thermal expansion)

Question 44

gypsum is used for?

Answer 44

investment for low heat

phospahte for high heat

Question 45

hottest part of the flame

Answer 45

reducing tip

Question 46

Function of 2 pins in die(pin dexing)

Answer 46

Antirotation-yes
Facilitates seating?- yes
Orienting die?- yes
Retention??- yes??? Holds the die better