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What are the uses of dental waxes?
boxing impression, bite registration, making of die, hold things together
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What is the composition of waxes?
Natural (plants, insects, minerals), synthetic (oils and fats)
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What is melting range?
temperature at which each component of wax will soften and flow
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What is flow?
Wax moves over on material
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What is the classification of waxes?
Pattern, processing, impression
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What is pattern wax?
inlay, casting, base plate
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what is processing waxes?
boxing, utility, sticky
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What is impression waxs?
corrective, bite registration
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What is the use of Impression Material?
Reproduce oral cavity and hard/soft tissue
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What are the classification of Impression Materials?
Elastic, Rigid
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What are the classifications of Elastic Impression?
Irreversible, Reversible
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What are the different types of Impression Trays?
Quadrant, mesh, metal, plastic, water cooled, custom
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What is a negative impression?
The original impression
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What is a positive impression?
stone poured impression
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What is a cast/model?
stone
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What is a die?
Single tooth crown
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Polyvinle
- -Irreversible
- -Hydrophilic
- -Things Needed: impression tray, delivery system
- -Insert it into delivery system
- -Brand Name: Express
- - no pouring, storeing it doesnt matter
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Rubber Base (Polysulfide)
- -Irreversible
- -Hydrophobic
- -Composition: Polysulfide = dentures
- -Things Needed: custom tray, diamond head spatila, onion pad, tongue blade
- -Manipulation: insert in tray and place in mouth. injection is crown and bridge
- -Brand Name: Rubber Base
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Alginate
- -Irreversible
- -Hydrophilic
- -Composition: agar (sea weed), potatsium sulfate
- -Things Needed: metal tray, beaver tail, rubber powder, water, vile, bowl
- -Manipulation: powder into liqud
- -Brand Name: Gel Trate
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Hydrocolloid (Agarloid)
- -Reversible
- -Hydrophobic
- -composition: agar, borax, potassium
- - things needed: unit, 18 gauge needed
- -name of unit: Hydrocolloid Conditioning Unit
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Baths/Times/ Temps of Hydrocolloid
- 1. liquifing 212 degrees
- 2. storing 150 degrees
- 3. tempory 110-115 degrees
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What tray is needed for Hydrocolloid?
Water cooled Rimlock
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What are the phases of Material?
Sol, Gel, sol
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Rigid Impression Material
- -Composition: thermal plastic
- -uses: hold things together, bite registration, die
- -how material comes supplied: cake, compoud (stick)
- -can be softened by flame or hot water
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What is Gypsum?
made from anything from Earth (rock,stone)
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What is the Chemical Properties of Dihydrate?
CAS04-2H20
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What is the chemical property of hemihydrate?
CAS04-1/2H20
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What are the classifications of gypsum products?
impreesion plaster, model plaster, dental stone, high strength, high expansion
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What is the manipulation of gypsum products?
powder into liquid with a specific bowl
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What is the setting order?
inital, final, working
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What are the methods of pouring casts?
double, single, boxing
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What does reversible mean?
can go back to original state
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what does irreversible mean?
cant take material back to original state
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what does elastic mean?
will flow easier and does pick up undercuts
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What does rigid mean?
doesnt pick up undercuts
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What does hydrophilic?
Does not mind water
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What does Hydrophobic mean?
Does not like water
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What is the size of Maxiallary trays?
1-5 (one being the largest)
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What is the size of Mandibular trays?
20-25 (20 being the largest)
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What tray does Poly Sulfide use?
Custom
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What tray does Poly Vinyl use?
stock, disposable, tri-tray
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What kind of tray does Alginate use?
metal, disposable, stock
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What is the purpose of sealants?
to seal non carrious pits and fissures for primary and permanent teeth. prevents cavities and dental decay
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What is polymerization?
the way the chemican sets
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What is light activated?
light cured- 1 component apply to tooth and activate by light
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What is Chemical activated?
self cure- usually 2 compnents and room light
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what is the composition of sealants?
bis-GMA, UDMA
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What is the working time of sealants?
- self cure- 2 minutes
- light cure- 20 seconds
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What is the placement order of sealants?
- 1. throughly clean the surface of tooth with non floralated tooth (pummus)
- 2. rings tooth, clean pummus off
- 3. dry tooth
- 4. apply acid edjent material for 60 seconds.
- 5. rinse tooth
- 6. throughly dry tooth
- 7. apply sealant material
- 8. cure
- 9. check occlusal portion of tooth
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What are the types of sport mouth guards?
stock, boil and bite, custom made
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What gage of material do you use for sporth mouth guards?
.080
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What is the procedure for fabriciation for sport mouth guards?
taking alginate impression, pour stone case, fabricate for mouth guard
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What are the different types of material bite guards come in?
hard arycllic, hard/soft lamenents, and thermal plastic sheets
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What is the procedure for fabrication of bite guards?
take alginate impression, pour stone cast, but must be sent to lab for fabriciation because the matieral is so hard.
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how do bleaching trays work?
Whitents teeth, 97& of enamel is minders, proxides or non-proxides agents
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What are the types of stains?
hydrogen proxide, carbon proxide, non hydrogen proxide systems, urea peroxide
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True/False. Stains that are yellow/brown are easier to bleach then blue/gray or black stains.
True
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What are the types of bleaching procedures?
home bleaching, in-office, non vitle teeth
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What is home bleaching?
10-22% carbon peroxide with a custom tray, wear 30 minutes twice a day
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What is in office bleaching?
45 minutes to an hour. 35% carbonbind peroxide with high intensity light-light causes sensitivity
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What is non vitle teeth bleaching?
teeth w/ root canal- toothe must be opened again and solution goes in it to lighten it back up
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What are the steps in fabrication of bleaching trays?
- 1. take good impression
- 2. pour in stone (microstone)
- 3. place seperating medium on teeth called Block Out
- 4. fabricate a mouth protector
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What size material do you use for bleaching trays?
.040
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What are the classifications of restorative materials?
intermediate, temporary, permanent
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What does intermediate mean?
between restoration and tooth
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What does temporary mean?
short duration
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What does permanent mean?
long duration
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Zoe B&T
- - comes in powder and liquid
- -manipulate by 1:1 powder into liqud
- - uses: sedative base,, thermal instilator on top of base b/c it prevents sensitivity
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IRM
- comes powder and liquid.
- composition: powder (zinx oxide) liquid (uginal)
- 1:2(drops)
- uses: temporary restoration
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Temp Bond
- comes: congel
- compostion: congel form has catalyst and base
- uses: temporary cement, creamy consistincy
- only one that acts as a cement
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What is Alloy?
mixture of two or more metals
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What is Amalgam?
restorative material that is composed of silver based alloy mixed with mercury
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What is the composition of amalgam?
- 40-50%= silver content(strength)
- 12-30%= tin(physical properties)
- 10-30%=copper(hardness)
- 0-2%=oxidation
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Safe lever in 40 hr work week:known as the threshold limit value (TLV):
0.005 mg/m3
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Equipment used to mix amalgam is called an:
Amalgumator
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The act of mixing amalgam is called:
turoration
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What are the types of mixes for amalgam?
- under triturated (dry and crumbly)
- properly triturated (satin like)
- over mixed(to wet)
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What is bringing to a uniform mass mean?
mulling
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How does amalgam come supplied?
powder, tablet, prepackaged
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What are the spills for amalgam?
- single spill=400mg
- 2 spill=600 mg
- 3 spill= 800mg
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What is the ratio for Ketac Bond?
1:1
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What is the ratio for Bitrebond?
1:1
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Resin Base
- Brand Name: Maxem
- Supplied: single system, syringe
- composition: resin base (fluorides)
- manipulated: put plunger, push, mixes
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Glassionomers
- auto cured
- brand name: Keytascem
- supplied: powder/liquid, capsul
- compostion: varies
- manipulated:1:3(drops) bring in my 1/3
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Fugi
- supplied: powder/liquid, capsule, clicker
- manipulated:1:2(drops) bring in my 1/2
- *mix on glossy pad with certain spatula
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Relie X
- Brand name:Vitremere
- light senstitive
- manipulated: 2:2
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Zinx Poly
- Brand name: durelon
- supplied: powder/liquid and syringe
- composition: zinx oxide(pwdr) poly arclyic acid w/ h20 co-palmer(liquid)
- 1:1 cal
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Zinc Phosphate
- supplied:powder/liquid
- composition: zinc oxide(pwdr) phosphoric acid (liquid)
- manipulated: 1mound:8(drops)
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What are the classifications of gold?
biocapability, solders, metals used in ortho, implant materials
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what does Pt stand for?
platinum
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what does Pd stand for?
pladiu,
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what are primary base metals?
copper, nickel, silver, zinc, tin, titanium
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What is more compatable with oral tissue but tend to corrode?
Nobile metals (biocapatibility)
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Women have allergies to what 10:1 over men?
Nickel
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What are the base metals added to nickel chromal alloys?
Beryllium (biocapatibility)
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What is an alloy used to join metals together?
solders
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What are formed after a metal cast has been made - bendable to desired shape - partials?
wrought metals
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What reacts with inorganic filler organic matric which causes the materials to adhere to each other?
silane coupling agent
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What is the measurment of gold content?
Karat
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What is the percent of gold times 10?
fineness
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What are symetrical to the midline?
anterior borders
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What are parallel to the buccal surface of the posterior teeth?
Lateral borders
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What are parallel to the opposite cuspid?
Posterior Corneres
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What are square with the midline?
Posterior Borders
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What are the parts of the Model Trimmer?
Grinding wheel, casing, platform
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