Chapter 44 Flashcards
True or False
Bacteremia can be created during polishing
True
True or False
Rotation of the rubber cup can force microorganisms into the tissue
True
True or False
Aerosoles are created during the use of rotary instruments
True (polishing paste, air and water sprays)
True or False
Polishing demineralized white spots of enamel is contraindicated
True - surface enamel is lost from abrasive polishing over demineralized spots
True or False
Thin enamel is contraindicated for polishing
True -such as emilogenesis
True or False
Smear layer can be removed when polishing
True - dental tubules become exposed
True or False
Use of course abrasives may create irregular scratches that will retain stain and biofilm more readily
True
Polishing pastes are not intended for use on restorative materials
True - can destroy the surface integrity of dental material
What are the rules for the use of cleaning or polishing agents?
light pressure, slow speed of the rubber cup, use a moist agent (never apply dry powders)
True or False
It is known that pellicle returns to cover the teeth within minutes of complete polishing
True
True or False
Biofilm begins to collect on pellicle within 1-2 hours, increasing in thickness by 12-24 hours
True - by 12-24 hours biofilm is thick enough to show clearly when disclosing agent is applied
True or False
Polishing is not recommended immediately following deep sub gingival scaling and root cleaning
True - abrasive particles can become embedded in the pocket wall and interfere with healing
True or False
Polishing on a patient with communicable disease is not recommended
True - it can be potentially disseminated by aerosols
True or False
Polishing is not recommended on soft spongy tissue that bleeds on brushing or gentle instrumentation
True
What are some of the abrasive agents in polishing paste?
picture
What is pumice made of?
complex silicates of aluminum, potassium, sodium of volcanic origin (volcanic ash)
Definition of abrasion
wearing away of surface material by friction
Definition of abrasive
a material composed of particles of sufficient hardness and sharpness to cut or scratch a softer material when drawn across its surface
Definition of air-powder polisher
air-powered device using air and water pressure to deliver a controlled stream of specifically processed sodium bicarbonate slurry through the hand piece nozzle
Definition of binder
substance used to hold abrasive particles together
Definition of coronal polishing
polishing of the anatomic crowns of the teeth to remove dental biofilm and extrinsic stains
Definition of glycerin
clear, colorless, syrupy fluid used as a vehicle and sweetening agent for drugs and as a solvent and vehicle for abrasive agents
Definition of grit
particle size in reference to abrasive agents
Definition of polishing
production, of a smooth, glossy, mirror-like surface that reflects light
Definition of psi
parts per square inch
Definition of rpm
revolutions per minute
Definition of slurry
thin, semi-fluid suspension of a solid in a liquid
Definition of three-body abrasive
which loose abrasive particles move in the interface space between the surface being polished and the polishing application device
Definition of two-body abrasion
two-body abrasive polishing involves abrasive particles attached to a medium that move directly against the surface being polished
Definition of tribiology
study and application of the principles of friction, lubrication, and wear as they apply to polishing
