Final Flashcards
What will inhibit free radical oxidation
Oxygen
4 major components of composite
Oligomer component is BISGNA
Fillers are very important
More filler =
Stronger and more abrasion resistant
Filler size. Larger particles=
Rougher surface
What degrades the bond of composite
When water is absorbed intraorally
Oxygen is
An air inhabited layer
What’s the primary cause if you add composite and it falls off
You more than likely polished it
Galvanic shock
Why does galvanism cause a shock
Two diff metals
Adding composite as often as you can in 2mm increments why?
Minimize amount of shrinkage
For bond to flow into Micro mechanical retention what is needed
Low contact angle
Depth of cure and ways you can influence it
Why is barium added to composite
It’s radio opaque not radiolucent
When you put the light on the composite where should it be
As close to the composite as you can get without touching it at flat angle
Biocompatablity
Chemical/dual cure has
Shrinkage
Composite is held in place by
The micro mechanical retention from the tubules
Polymerization reaction is what kind of reaction
Free radical ?
When you are choosing a. Composite resin what factor will have the greatest impact on its characteristics
Fillers
How much overlap for cerac scanner
1/3
What’s the difference between PVS impressions and cerec
Cerec is positive PVS and agitate it negative impression
Bluecam and Omnicam
Both need isolation
Why do you use a powder with digital
Reduce shine of metals
Is it difficult to store digital scans
No
Characteristics of waxes
Are waxes good thermal conductors
No but the have a large coefficient of expansion
All waxes have a ______________
Specific melting RANGE
When you’re using a wax that has a tendency to return to its original shape it is ___________
Elastic memory
What do you use for a final impression
Elastomeric material PVS
What elastomeric impression material may form hydrogen gas
Monomer and polymer which is which
Monomer is liquid polymer is powder
What in benzoyl peroxide
Which chemical is added to the light activated resin as photoinitiator
Campoq
When bonding cement to calcium of hydroxy appetite and dentin what kind of bond is it
Chemical
Waht causes surface tension in liquids
Amorphous and crystalline
Is it a good idea to subject materials to plastic strength
No
Cathodic
Anodic
Stress strain diagram
Force deformation diagram
Waht causes precipitation hardening
Type III metal from clenching or RAPID COOLING
To excise tissue under a healing cap how would you do it
A laser to prevent bleeding for impression
When you mix an amalgam what is happening
Amalgamation
What part of mercury is the most dangerous
When it is being grounded out of a restoration and vapor element is created
Dual cure
Composite procedure
Chart on composites restoring facial on #9, what composite would be best for it
Micro fill—nano particle ?
Provisional composite use for
Temp crown
How can you control the depth of cure of your light
Distance the light is from restoration. Amount of time cured. Intensity of light.
