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