Materials Final Flashcards
What dental wax is supplied in sheets and can be used to record the occlusal rim for dentures
Baseplate wax
What can be used under direct and indirect restorations
Desensitizer/primer
Guidelines for mixing dental cement
Read instructions, determine use and measure powder and liquid with powder and liquid on opp sides, divide powder in small increments
What type of crown doesnt cover the entire anatomic portion of the mouth
Three-quarter crown
You can lengthen or extend the borders of the impression tray by using what
Utility wax
What is the powder to water ration for high strength stone
100 stone to 19-24ml water
When a patient has a three unit bridge what is used to clean under the Pontic
Bridge threader
Physical pulpal stimuli
Thermal changes/electrical energy
Mechanical pulpal stimuli
Vibrations from handpiece during prep, traumatic occlusion
Chemical pulpal stimuli
Acidic materials
Biologic pulpal stimuli
Bacteria from saliva contacting pulpal tissues
How are elastomeric impression materials mixed
Pad/spatula, gun
Abutment
Natural tooth serves as support for replacement tooth
Pontic
Artificial tooth replaces missing natural tooth
Can intrinsic stains or severe tetracycline stains be bleached
Yes
What type of indirect restoration is designed to fit snugly within a tooth preparation such as a class 2, covering only a portion of the occlusal and proximal surface
Inlay
What type of impression tray covers half of a dental arch
Quadrant tray
What type of impression material is used when an accurate impression is essential
Final impression, elastomeric
What type of cement is most versatile
Glass ionomer
Acid etching utilizes etchant that contains what type of acid
Maleic acid/phosphoric acid
What is the purpose of provisional coverage
Temporary crown restores and maintains function to certain areas keep patient comfortable during tooth preparation/final cementation
What can be used if decay has extended into or is close to the pulp
Liner, base, desensitizer
The retromolar area, lingual frenum, and the mylohyoid ridge must be seen in which impression
Mandibular Alginate impression
What cements can be light cured
Composite resin, glass ionomer
Cure
Setting process of dental material initiated by chemical reaction or buy light in blue waves spectrum
What can be used for core buildup
Amalgam, reinforced glass ionomer, self curing composite
For quick bleaching results which method would be best
In office treatment
Maryland bridge/resin bonded bridge
A pontic with wing like extensions from mesial/distal sides
What type of tray is used for the reversible hydrocolloid
Water cooled tray
If placing a post for retention aid, what procedure would have had to have been done prior
Core buildup, enlarging the treated pulp canal/keying slots on adjacent Dentin
Example of enamel bonding
Placement of sealants, bonding of ortho brackets, use of resin bonded bridges
When using zinc phosphate as a base what is used first
A liner
Why do you keep the Alginet impression moist before pouring it up
Will provide an atmosphere Close to 100% relative humidity causing the least amount of distortion
The cervical margins of the provisional should have no more then how many millimeters of space between the provisional and the margin of the prepped to
0.5 mm
Which type of ZOE is used for the cementation of provisional coverage
Type one, temp luting cement
When and how is varnish applied
Applied with small disposable applicator after liner is applied
Microleakage
Microscopic leakage at the interface of the tooth structure and the sealant or restoration
When cementing bonded brackets, what type of glass ionomer cement is used
Type five
If the patient needs to wear a provisional coverage for a longer period of time what procedure might they have had
Implants or Perio therapy
Pre-fabricated Preformed polymer crown
Use a polymer shell filled with hybrid composite resin material
Pre-fabricated poly carbonate crown
Only anterior’s varying sizes when appearance is important
Pre-fabricated stainless steel crown
Aluminum primary posterior restoration when strength is essential in color match is not a concern
What is the most common and natural looking provisional coverage used for crown and bridge preparations
Custom/polycarboxylate
Calcium hydroxide (Dycal) uses and what is it compatible with
Cavity liner, protect pulp from chemical irritation, stimulates production of reparative or secondary Denton, compatible with all types of restorative material
About how many years does tooth whitening last
3 to 5 years
In office teeth whitening
One hour best treatment
At home teeth whitening
Two weeks second best (under care of Dentist)
Over the counter teeth whitening
Brush On: minimum amount whitening strips: 7 to 10 days trays with gel: affordable, similar to dental office
Where shouldn’t the provisional crown extend below
Margin of the preparation
What can dental varnish do
Seal Denton tubules and reduce microleakage
Model trimmer
Used to trim stone or plaster models, abrasive grinding wheel
How will gypsum material be affected if water is added after the mixing process has begun
The crystallization (setting) process will be disturbed and won’t have desired strength
What is this smear layer and wet material removes it
Very thin layer of debris on newly prepped Denton and acid etch and is used to remove it
Permanent cement are used for looting what types of restoration
Long term cementation of permanent cast restorations (inlay, crown, bridges, laminate veneers, ortho fixed appliances)
Indications for provisional coverage
Prevent/reduce sensitivity/discomfort of prepped tooth/surrounding tissue, maintain function/aesthetics, protect margins of prep, prevent shifting of adjacent/opposing teeth
What do insulating bases protect the tooth from
Thermal shock
What can be cemented into the pulpal canal and can be made from an acrylic pattern by a lab technician
A cast post
What is the purpose of a core build up
Used when tooth is vital, supports the cast crown and provides a larger area of surface retention for cementation of crown
What type is a looting cement classified as and what does it act as
Type one, acts as an adhesive to hold together the indirect restoration and the tooth structure
Which type of cement is used with provisional coverage
ZOE type one
Why are protective bases placed
Additional layer in restoration process used to protect pulp went to the prep is moderately deep too deep
When one or more teeth are missing from the same arch or quadrant a permanent what would be recommended
Crown and bridge or fix prosthodontic or fixed bridge
What type of glass ionomer used for restoring an area of erosion near the gingiva
Type two
What is placed under a porcelain restoration to mask tooth discoloration
Opaquer
What would be an indication for fixed prosthodontics
Supportive tissues healthy, suitable abutments present, patient in good health, patient has skills/motivation for good oral hygiene, one or two adjacent teeth missing same arch
Procedure/application of acid etchant material
Liquid or gel with syringe type applicator, 15 to 20 seconds recommended time for placement, placed on enamel and/or Denton in prep for bonding composite resin or sealant
Application and uses for desensitizer
Used to prevent or treat hypersensitivity (primer), used instead of varnish, seals dentinal tubules preventing oral fluids from sleeping between tooth and restoration. Use sparingly no materials contact soft tissue
Where is the varnish applied in the cavity prep
After liner applied within entire prep, thin coating on walls, floors, and margin
Dental materials that are applied while still pliable and can be adapted are classified as what
Direct restorative materials
