Card Set Information
ch 12 abrasion finishing and polishing
proper _____ and _____ of tooth structures and restorative materials is significant
finishing and polishing
proper finishing and polishing of ____ ____ and ____ ____ is significant
what three things are significant about finishing and polishing?
improves tissue health
increases longevity of filling
proper finishing and polishing of tooth structures and restorative materials is significant because it can improve ______, improve ___ ____ and increases longevity of ____
size, irregularity and ______ of particles, ______ of particles contacting surface, _____ and pressure and the polishing disc are factors affecting what?
what is the most abrasive material used in dentistry?
DIAMONDS are a girls best friend
larger, irregular particles=
what type of particles is more abrasive?
LARGER and IRREGULAR particles
what is the scale used to rank materials by abrasion resistance?
MOHs' hardness scale
using the Mohs' harness scale what is the abrasion resistance of diamond?
using the Mohs' harness scale what is the abrasion resistance of tungsten carbide?
using the Mohs' harness scale what is the abrasion resistance of ALUMINUM OXIDE
using the Mohs' harness scale what is the abrasion resistance of PUMICE and PORCELAIN
using the Mohs' harness scale what is the abrasion resistance of TIN OXIDE
using the Mohs' harness scale what is the abrasion resistance of ENAMEL
using the Mohs' harness scale what is the abrasion resistance of COMPOSITE
using the Mohs' harness scale what is the abrasion resistance of DENTIN
using the Mohs' harness scale what is the abrasion resistance of ACRYLIC and CEMENTUM
using the Mohs' harness scale what is the abrasion resistance of GOLD
using the Mohs' harness scale what is the abrasion resistance of AMALGAM
t/f on the Moh's hardness scale DIAMOND has a abrasion resistance of 5-6
t/f on the mohs' hardness scale PORCELAIN has an abrasion resistance of 6-7
t/f on the mohs' hardness scal ENAMEL has an abrasion resistance of 5
t/f on the mohs' hardness scale DENTIN has an abrasion resistance of 4
true dat mhm
t/f on the mohs' scale porcelain is harder than enamel or dentin
what are the implications of procelain being harder than enamel and dentin?
a porcelain crown on the max anteriors means for great abrasion on the man anteriors
the _____ the difference in the abrasive and the surface it is abrading the ______ and more _____ the abrasive action
t/f the greater the difference in the abrasive and the surface it is abrading the slower and less effective the abrasive action
FALSE be that! the FASTER and MORE EFFECTIVE mmmkay? GOT IT!
what will increasing pressure with an abrasive produce?
HEAT from FRICTION
what will increasing the speed and pressure of the abrasive do to the rate of abrasion?
INCREASE the rate of ABRASION
what can you do to increase the rate of abrasion?
increasing the speed and pressure of the abrasive
what is the rate of diamond on the Mohs' scale
____ has a rate of 10 on the mohs' scale: it has _____ particles in paste and is used to polish _____ and _____
t/f carbide finishing burs have less flutes
FALSE okay? it has MORE flutes MORE MORE MORE!
_____ finishing burs have ____ flutes and the ____ the abrasiveness
MORE MORE MORE MORE MORE
t/f the more flutes the more polishing it does and the less flutes and the farther apart the flutes are the more it abrades
True (critial thinking..I am going to make you think)
what is used to sandblast restorations for cemenation?
pumICE ice baby dun dun dun dun dun dun dun ice ice baby
at what stage of polishing is TIN OXIDE used? Why?
FINAL-its less abrasive
what is tin oxide used to polish?
gold, ceramic, amalgam or composite restorations in the mouth
what is a very fine smooth paste?
what is a prophy paste and a dentifrice polisher?
t/f you are supposed to polish the entire mouth with prophy paste
FALSE-only surfaces with stain
what surfaces do you polish with prophy paste?
surfaces with stain
what is removed with when polishing with prophy paste? 3
fluoride rich enamel layer
what is an abrasive agent that has improved efficiency to remove STAIN, BIOFILM and DEBRIS
what is toothpaste used to remove??
t/f prosthesis with metal can be placed in diluted acid solutions or hypochlorite for cleanings
FALSE they CANNOT okay? Do you hear me?? DONT DO IT! it is CORROSIVE
what are three characteristics of denture cleansers
loosen stains and plaque
amalgam finishing and polishing benefits incluede ____ bioflim retention and ____ resistance to tarnish and corrosion (you know this, you shouldn't have to study GOT IT)
the benefits of finishing and polishing amalgams are decreased _____ ____ and increased resistance to ____ and ____
tarnish and corrosion
what should you check with amalgams for prematurities and deficiencies?
how should the cavosurface margin of an amalgam be?
SMOOTH-like a babies bottom (this is when Jade says AWWW I want a baby haha cute Jade)
what is the removal of excessive resorative material from margins of restorations?
t/f the overhang or flash of an amalgam should not be extensive in size it should be SMALL
how should the proximal contact of an amalgam be?
CLOSED- don't want to open contact..why?? (critical thinking) maybe because you can get food trapped in there?? hmm ya think so?
what is the final polishing for composite?
submicron ALUMINUM OXIDE
what is the final polish on amalgam
t/f the tin oxide is used as a final polish on composites
FALSE used on AMALGAMS
aluminum oxide is used on composites
t/f the staining at the margins of a compoiste needs to be polished away to prevent leakage
FALSE it CANNOT be polished away
t/f polishing the contact area between teeth on a contact is undesirable
true true why? critical thinking!
when should you polish a composite filling?
only if stain is present
what should you avoid with composites?
ultrasonic, sonic scalers and air polishing
what polishing paste is used for composites?
what should you do if there is stain in teh cement?
treat like composite polish it!
WITH RESIN CEMENT INTERFACE WHAT DO YOU NEED TO CHECK?
is it STAINING of is it MICROLEAKAGE (sorry I can't control the volume of my typing...don't cry because I yelled at you through text)
what should you use on implants? 3
plastic OR graphite instruments
plastic sheaths on u/s scalers
what kind of polishing paste is used on implants?
TIN OXIDE same as amalgams
what is air polishing a combination of?
sodium bicarbonate and air/water
what is the PSI for air polishing
what do you want to avoid with air polishing? 4
what is known as microabrasion?
what is used to remove minimal amount of tooth and restorative structure?
t/f microabrasion is recommended for stain removal
FALSE- it is NOT recommended
what are four safety and infection control procedures that should be followed with rotary device and moisture because of aerosols?
use protective equipement
protective eyewear for patient
patient microbial rinses
high speed evacuation