Cementation Flashcards
T/F: FIRST – If you did a lot of adjusting to the temporary
at the previous appointment, causing it to be more
than slightly different than the previous matrix, a new
matrix of the temp can and should be made of the
temporary, to save you time in case you need to
remake the temp due to breakage in the process of
removing it.
True
-Using Curved Hemostat, gently rock the
temporary back and forth to break the
cement seal.
-Care should be taken to grasp the temporary in
a manner in which the temporary is not likely
to break.
-Clean out the inside of the temporary, disinfect
it, and set it aside.
Removing the temp
______ When do you make sure you have either the
temporary matrix or take a new one.
ALWAYS
-If the temp does not come off, you may need to
________ the temp in order to try in
the framework
gently section off
Special care should be taken when removing a
temporary on teeth with an RCT, or Post, or
Build Up.
IF the temporary does not come off easily, or
you are concerned at all about the
materials and their stability under the temp,
________ the temp.
SECTION off
Once the temporary is removed:
-Clean off any excess cement chunks
-Clean the tooth preparations with
________
pumice slurry.
Evaluate the framework/final prosthesis
Any needs for remake or alteration
Make any adjustments ____ to patient appointment
prior
Check the framework _____ to the patient coming into the office.
PRIOR
-Use _______ or similar to check internal
surface.
-Adjust any ”positive” areas
-Only minor adjustments should be made in the
internal surface.
“Fit Checker”
A _______ defect means there is too much
framework material, and this can be polished
away with a stone or rubber wheel to see if this
allows the rock to disappear
“positive”
A ______ defect means you have an open
margin and a new impression will need to be
taken.
“negative”
-If the Contacts are appropriate
-If the Internal surface is not hindering seat
-Then the Framework may be distorted.
What do you do?
-Section the framework through a connector
-Evaluate each retainer separately
-If individually, each retainer fits, move forward with
solder technique
-If individually, either retainer still wobbles or rocks,
take a new impression
When should the shade be confirmed in the delivery of the crown?
Framework try-in
When do you take radiographs in the framework try in and porcelain try ins?
After framework has shown to fit before sending back to lab for porcelain
Before cementation
If the proximal contacts are not there, what do you do?
Send it back to lab to add more porcelain
Final step prior to cementation is _______.
polishing/finishing
Metal adjustments can be polished like Gold. ______ polishers work very well. Two step polishing.
Brown and
Green polishers
If it is necessary to smooth or polish at the Metal-Ceramic
junction:
-the burr/stone should be held ______ to the junction
otherwise, the metal particles contaminate the
porcelain decreasing the esthetics.
perpendicular
Polishing Porcelain:
-Margin adjustment should be made
_______ to the margin and rotation of
polisher should be _______ bulk of material
perpendicular; toward
Polish _____ with diamond rubber
points and then a fine diamond
impregnated polishing paste
porcelain
The word ‘_____ implies the
use of a moldable substance to seal a space or to
cement two components together
luting’
\_\_\_\_\_\_ Cement Characteristics: Advantages: -Adhesion to tooth substance and alloys -Easy manipulation -Strength -Solubility -Film Thickness properties comparable to Zinc Phosphate -Fluoride release Disadvantages: -Needs accurate proportioning -Critical manipulation -Lower Compressive strength -Greater viscoelasticity than Zinc Phosphate -Short working time -Clean surfaces needed for best adhesion
RMGI
-Self etching primer with no extra Dentin Bonding
Agent
Self-Etch
-No etch, no primer, no Dentin Bonding Agent
Self- Adhesive
______ and _______ resin cements bond to
the tooth.
Self-Etch and Self-Adhesive
Should you do total or selective etch on crown prep?
Selective
\_\_\_\_\_\_\_ Cement Characteristics Advantages -High Strength -Low oral solubility -high micromechanical bonding to dentin, alloys and ceramic surfaces Disadvantages: -Need for meticulous and critical technique -More difficult sealing -Higher film thickness -Possible leakage -Pulpal Sensitivity -Difficulty in removal of excess cement.
Resin based
\_\_\_\_\_ Resin Cement -Requires use of Dentin Bonding Agent -Dentin Bonding Agent bonds to tooth and Resin Cement bonds to Dentin Bonding Agent -Most esthetic cement system -Most retentive -Used for Veneer restorations mostly
Adhesive
________ Resin Cements
-Self-Etch Adhesive Resin Cement does not require a separate Dentin
Bonding Agent but requires tooth pre-treatment in the form of a
“Primer”.
-Self-Adhesive Resin Cement requires no Dentin Bonding Agent nor does it
require a Self-Etch Primer pre-treatment.
-Resin Cement interacts directly with the tooth surface
-Generally creates higher bonds to dentin.
Self-Adhesive
How many steps in a Adhesive Resin Cement with Dentin Bonding Agent?
3 steps
How many steps in Self-Etch resin cement?
2 steps
How many steps in Self- Adhesive resin cement?
1 step
_____ cements require a moisture free environment
- is required for low-strength glass ceramics (Veneers)
Resin Cements
_______ cements are contra-indicated with low-
strength glass ceramics
-These cements absorb water and expand as they set which could
cause fracture of ceramics
Resin Modified Glass Ionomer
______cements need an adequate retentive preparation
- is great with metal, PFM, and Zirconia restorations.
RMGI
_______ Cements are recommended for eMax crowns to offset the brittle nature of glass
ceramic.
Resin cements
______ cement is typically only used with IPS e.max when tooth preparations are sufficiently deep
and retentive mechanically, and patients are highly caries-prone (geriatric, pediatric, etc.).
RMGI
With adequate preparation retentive features, what cement is most commonly used for PFM?
RMGI
Without totally adequate preparation retentive
features, wonky occlusion, or bruxer for PFM?
Resin cement (dual cure or self cure)
Due to strength of Glass Ceramics, ______ is the
cement of choice.
Resin Cement (Prefer Dual Cure or Self Cure)
With adequate preparation retentive features zirconias are most commonly cemented with _____
RMGI cement
Without totally adequate preparation retentive features, wonky
occlusion, or bruxer _____ Cement should be considered due to its
increased strength.
Resin (dual and self cure)
_______ from some temporary cements will prohibit polymerization of
any composite Resin.
-Acid etchant removes it
-Provisional cement residue occludes tubules and decreases effective
bonding.
-Cleaning the tooth with pumice removes the temporary cement
residue.
Eugenol
Patient should close down on ______ to help with seating of crown.
DO NOT USE ANYTHING HARD FOR THIS STEP – Leads to fracturing
soft cotton roll
If occlusion does not permit solid pressure for crown seating, __________ is used to fully seat crown until cement has cured on its own,
or it has been light cured.
firm pressure
from finger
When using a curing light for a Resin Cement, seat the crown full
of cement, and _____ the cement
“Tack”
