CEREC and final Flashcards
how can you always find your omni file
- your name
- faculty – as dentist
- patient record for ID
can you use USB with cerec omni?
NO.
can you access your files in any unit or computer?
yes
typical work flow with unprepped tooth
likely 2 appointments
appointment 1 –> prep and temp
between –> meet with faculty to design
appointment 2 –> try in crown and bond with multilink
typical workflow from prepped tooth
*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
list of materials to mill
- vita mark II block
- vita enamic
- ivoclar - E-max
- celtra duo
vita mark II block
material?
location of use?
Feldspathic porcelain
pre-molars, anterior teeth
vita enamic
material?
location of use?
porcelain / composite
use - inlays, onlays
ivoclar E-max
material?
location of use?
lithium dislicate
molars, anterior teeth
celtra duo
material?
location of use?
lithium silicate
pre-molars
get blocks where?
go to 6ht floor window and fill out appropriate form and have the form signed by your faculty
etching of enamic
60 seconds with 5% HF
30 seconds with 9.6% HF
etching Mark II blocks
30 seconds with 9.6 HF
etching celtra duo
30 seconds with 9.6%
etching emax
20 seconds with 5% HF or 15 seconds with 9.6%
checking occlusion and there is a mark on #19 on buccal inclines of lingual cusp?
this is a working side interference
advantages of PVS
can use multiple pours
NOT removed easily, NO to waiting 45 minutes to pour
advantages of reversible hydrocolloid
- cheap
- hydrophilic
not strength and not accuracy
situations to use block temp
all really
ovate pontic use?
not for all situations – but it IS THE MOST ESTHETIC
what can you use for occlusal registration for mounting die mold
- beauty wax
- PVS
- Polyether
- Duralay
function of 2 pins in die?
anti-rotation
Antirotation-yes
Facilitates seating?
Orienting die?
Retention??
what will prevent clinically successful margins?
unsupported enamel
Which of these impede seating of a prefabricated polycarbonate crowns before relining
Margins hit tooth- yes
Contacts interfering-yes
Internal surface hitting-yes
Occlusion-no
Die not seating in model entirely what will happen to the restoration?
Hyperocclusion
casting not fitting on die what to do
re-wax and re-cast
Crown does not fit what will you check first
contacts
casting does noit fit on die model - what could the problem be?
internal surface
T/F you can decrease value of a crown by external staining
False - you cannot
T/F you can decrease value of a crown by external staining
False - you cannot
Metamerism can be minimized by and pt satisfaction and esthetics can be increased by
Matching/selecting shade in different lights-yes
Correct shape of restoration-yes
Highly polish it-no
cases needing occlusal registration to mount
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
incisal reduction for pfm crown
1.5 - 2 mm
disadvantages of pfm over gold
less concervative
fractures more
abrades teeth more
T/F you should start the block temp before makingthe final impression
True
19 mark on the lingual incline of the buccal cusp?
non-working interference
a good impression for a single crown should include?
- prepped tooth
- unprepped tooth
- margins
- some neighboring tooth structure
tool to help pouring impressions
number 7 spatula – NOT a brush
grind the base?
NO - never because our pins are here and can distort them
after have die what do we apply and why?
material that will act as spacer for the cement later on
function of die spacer
space for the cement
after add wax then what?
screw to be able to flow the material you will be using into
types of expansion we may get
- normal setting expansion (in material)
- hydroscropic (related to water)
- thermal expansion
- when burn out pattern (thermal expansion)
gypsum is used for?
investment for low heat
phospahte for high heat
hottest part of the flame
reducing tip
Function of 2 pins in die(pin dexing)
Antirotation-yes
Facilitates seating?- yes
Orienting die?- yes
Retention??- yes??? Holds the die better
