dental abrasives Flashcards
wearing away of a substance or structure through a mechanical process, such as grinding, rubbing or scraping. It occurs when a hard, rough surface slides along a softer surface and cuts a series of grooves. Also referred to as GRINDING.
ABRASION
material of sufficient hardness and sharpness to cut, or scratch a softer materia
ABRASIVES
Process of producing the final shape and contour of a restoration. Removes surface blemishes and produce a smooth surface
FINISHING
abrasion of the surfaces to reduce the size of scratch until the surface appears shiny.
POLISHING
ABRASIVE CAN BE SUPPLIED AS: (8; PCEBPCRP)
- Paper/plastic coated
- Coated strips
- Electroplating bonding
- Bonded stones
- Powder form
- Cake form
- Rubber impregnated
- Paste form
CLASSIFICATION OF ABRASIVES (3)
A. Finishing abrasives
B. Polishing abrasives
C. Cleansing abrasives
DESIRABLE CHARACTERISTICS OF AN ABRASIVE (4; IHHA)
- IRREGULAR IN SHAPE
- HARDER THAN THE SURFACE
- HIGH IMPACT STRENGTH
- ATTRITION RESISTANCE
METHODS OF ABRASION (3; MRB)
- Manually
- Rotary instruments
- Blasting -
TYPES OF ABRASIVES (ACSGCESADTCTKZ)
ARKANSAS STONE
CHALK
SAND
GARNET
CORUNDUM
EMERY
SILICONE CARBIDE
ALUMINUM OXIDE
DIAMOND
TIN OXIDE
CHROMIC OXIDE
TRIPOLI
KIESELGUHR
ZIRCONIUM SILICATE
STEPS IN FINISHING AND POLISHING(CFP)
- CONTOUR
- FINISH
- POLISH
FINISHING AND POLISHING TECHNIQUES
- DENTAL AMALGAM
- COMPOSITES
- ACRYLIC DENTURE BASE
- Popularly known as toothpastes
- these are agents used with a toothbrush to cleanse and polish natural teeth.
- They should have maximum cleansing efficiency with minimum tooth abrasion.
DENTIFRICES
