Dental Materials

Frage	Antworten
Abrassion	Wearing away or removal of material by the act of rubbing, cutting or scraping.
Abrasive	A material composed of particles of sufficient hardness and sharpness to cut of scratch a softer material when drawn across the surface.
Finishing	A procedure used to reduce excess restorative material to develop appropriate occlusion and contour.
Polishing	A procedure that produces a shiny, smooth surface by eliminating fine scratches, minor surface imperfections, and surface stains using mild abrasives.
Mohs’ hardness scale	Ranks materials by their relative abrasion resistance
Loose abrasive	powders and pastes for finishing, polishing & cleaning
Bonded abrasive	Abrasive particle uniformly incorporated to form device (Disk, cup, brush, wheel)
Coates abrasive	Attached to rotary disc or handheld finishing strip
Diamond	Hardest known substance
Pumice	volcanic silica, loose abrasive, and component of many prophy pastes
what restorations should not be polished sooner than 24 hours after they are placed	Amalgam
what restorations are finished and polished as part of the restorative procedure	Composite
How is intermediate finishing accomplished?	With flexible discs, cups and strips.
Margination	The process of removing excess restorative material to bring the restoration flush with the tooth
Porcelain	Resistant to stain - prophy paste may scratch porcelain glaze
What is used to contour, finish, and polish the surfaces of restorations	Abrasive agents
Tin oxide	Extremely fine, used as final polishing agent, powder-water/glycerin mix
Cemented Margins	Margins on resin-bonded porcelain restorations are more susceptible to staining because of the properties of the resin cements
Air Polishing	The use of air to propel very small microparticles as a replacement for rotary cutting and polishing instruments has gained much popularity
Aresols	Created when a rotary device and moisture are used
benefits of a properly finished and polished restoration	-Decreased biofilm retention -Resistance to tarnish/corrosion -Increased longevity of the restoration -Decreased attrition of natural tooth surfaces during chewing -Improved esthetics -Improved health of surrounding tissue
Composites are stained by?	Coffee, tea, wine, tobacco.
How do you clean dentures?	The use of a toothbrush with water and a mild cleansing agent is sufficient to remove most plaque, surface stains, and food debris from removable prosthetic appliances
How is final polishing accomplished?	With a sub-micron aluminum oxxide polishing paste applied to the tooth with soft cups or felt pads.
MI paste	Contains amorphous calcium phosphate with Recaldent. This means that the teeth can actually remineralize and repair

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	Erstellt von kari moreland vor fast 7 Jahre