Final Exam Review Flashcards
The process of mixing mercury with metal alloy by vigorous shaking is:
trituration
Tin is added to the metal alloy of amalgam to:
counterbalance the rapid hardening and high expansion properties of silver
This high copper alloy form of amalgam easily adapts to undercuts in the tooth preparation
Spherical
What is the condition that may occur if an amalgam filling is touched by a dissimilar metal, causing a transference of charge?
Galvanic Shock
The expansion and contraction of amalgam is ______ that of surrrounding tooth struture.
greater than
What is the most significant concern for dental healthcare workers while handling mercury?
Mercury vapour release
A single spill capsule of amalgam contains ____ mg of alloy.
600
Scrap amalgam should not be ______.
-disposed of in a general garbage
-washed down the drain
-placed in the sharps container
The term that refers to a transference of electric charge when dissimilar metals touch is:
Galvanism
Recognising all materials used in restorative dentistry, and understanding their behaviour and handling is important in order for the dental assistant to diagnose and treat the patient effectively. True or False?
False - DA does not diagnose
An ideal dental material should be dimensionally stable. This means:
Its expansion and contraction factors are similar to that of a tooth strucutre.
The most affordable dental restorative material is:
dental amalgam
There are five basic principles followed in four -handed dentistry. True or False?
False - there are 4
The _____ grasp is most often utilized with dental hand instrument.
pen
When using one-handed instrument transfer, the dental assistant will pick up the used instrument with her/his:
baby finger
The glass ionomers used as restorative material are called:
hyrbid
Vitremer glass Ionomer restorative material is a ______ product
dual cure
Most glass ionomer powders contain _____ as an essential component.
glass
The glass ionomer used for core build ups is blue. True or False?
True
Glass ionomers do not have the ability to bond to tooth structure. True or False?
False
Glass ionomers have the ability to reflect light in the same manner as a composite material. True or False?
False - composite is able to reflect light better than glass ionomer in a way more similar to that of a tooth
The Vitremer primer must be applied continuously for ______ seconds.
30
A glass ionomer restoration is charted on the odontogram in:
Green
Polymerization is the process of resin hardening. True or False?
True
Autopolymerization of a resin requires it to be exposed to a concentrated light source. True or False?
False - is a chemical reaction
Chemical adhesion occurs when materials molecularly bond to one another during the polymerization process. True or False?
True
The inorganic resin component of composite resin is commonly known as BIS-GMA. True or False?
False - BIS-GMA is the ORGANIC resin matrix
Quartz, glass and silica are the most common inorganic filler particles used in composite resin restorative material. True or False?
True
Silane is added to composite resin to hold all of the components together and keep the filler particles from settling. True or False?
True
The exact light exposure time for each layer of composite resin is dependent on its thickness, the shade of material and the manufacturer’s directions. True or False?
True
For adequate etching to occur, the tooth surfaces should be exposed to phosphoric acid gel for 30-40 seconds. True or False ?
False - should be 15 seconds
Multiple layers of primer are often used to allow the material to adequately penetrate the open dentinal tubules. True or False?
True
Bonding resins are always photopolymerized prior to placement of composite resin restorative material. True or False?
False
What kind of restoration is a cavity varnish liner used in?
Non-bonded amalgam
What restorative material(s) is retained in the preparation by means of chemical retention?
Composite, Glass Ionomer & Bonded Amalgam
What hand cutting instruments are required for placing mechanical retention on a 1.5 MO preparation?
Inverted cone bur, angle former & mesial margin trimmer
Can we use Varnish with Bonded Amalgam?
NO - ABSOLUTELY NOT.. it will seal off all of the dentinal tubules and not allow acid etch to work properly and make microtags
List the application steps when using scotchbond for a bonded amalgam filling.
- Etch for 15 seconds, rinse for 15 seconds and dry
- Dispense 1 drop each of primer and activator, into
dispensing well, mix, apply to all surfaces of preparation for 15 seconds and air dry for 5 seconds. - Dispense 1 drop each of adhesive and catalyst into a dispensing well, mix, apply to all surfaces of preparation.
List the application steps when using Scotchbond for a composite restoration.
- Etch for 15 seconds, rinse for 15 seconds and dry.
- Dispense 1 drop primer into a dispensing well and apply to all surfaces of preparation for 15 seconds and air dry for 5 seconds.
- Dispense 1 drop of adhesive into a dispensing well and apply to all surfaces of the preparation and light cure for 10 seconds.
List the instruments that are required to finish a composite restoration.
- Football or flame finising bur
- Anterior or posterior finishing knife (based on scenario)
- Finishing strip
- Enhance point bur
Place the application steps for a composite filling in the correct order.
Liner placement
Matrix System
Etch
Bonding system
Flowable composite placement
Composite placement
Finishing burs
Enhance burs
Place the application steps in the correct order for a glass ionomer retoration.
Cavity conditioner
Mix glass ionomer powder & liquid
Load dispensing tip
Apply Fuji Top Coat
Light Cure
What is the difference between using Scotchbond with an amalgam and using Scotchbond with a composite filling?
A bonded amalgam requires the use of the primer, adhesive, catalyst & activator
Composite does not require the catalyst & activator
What instruments are required for mechanical retention on a 1.5 MO?
spoon excavator
inverted cone
angle former
mesial margin trimme
List the Scotch Bond Application Steps
In order..
Etch & Rinse
Primer & Dry
Adhesive
Light-Cure
Place in order of use intstruments required for finsihing an amalgam restoration
Ball Burnisher
Explorer
Disco Cleiod Carver
Hollenback Carver
Place in order of use all instruments required to finish a composite restoration
Football/Flame finishing bur
anterior / posterior finishing knife
Composite finishing strip
enhance rubber bur
Place steps in order for a composite restoratio
Liners/Bases
Matrix Bands
Etch & Bond
Composite Placement & Finishing
List the Application Steps for Glass Ionomer
Cavity conditioner
Mix Powder & Liquid
Load Applicator Tip
Apply Finishing Gloss
What is Varnish used with?
Non bonded amalgam
What restorative material requires chemical retention?
Composite
Glass Ionomer
Bonded Amalgam
What is the process by which resin is changed from a pliable state to a hardened state?
Polymerization
The exact time requried to light cure a restorative material depends on?
Manufacturers instructions
Thickness and size of the restoration
Shade of material being used
What is the proper way to take a shade?
With natural light prior to procedure begining
What is the Football bur used for?
Finishing of a restoration
What does Filler provide in a composite restorative material?
- These fillers add the strength and characteristics
that are needed in a restorative material
What are Hybrid composites?
◦ Most often used today, they contain a mixed range of
particle sizes. They have high wear resistance and
excellent shading characteristics
