what will happen to the blade if inaccurate sharpening is done?
the blade can distort and the instrument will be useless
t/f sharpening is an essental and integral part of instrumentation
true
t/f an instrument that is in good shape with sharp cutting edges leads to decreased tactile sensitivity during instrumentation
FALSE! INCREASED
t/f a dull instrument has to be gripped firmly
true
t/f fewer strokes are required with a sharp instrument
true!
t/f there is less possibility of burnishing rather than removing calc with a dull instrument
false! with a SHARP instrument
t/f if an instrument is dull, there is loss of control and increased likelihood of slipping with instrument and lacerating the gingival tissue
true
with a ____ instrument, there will be a greater likelihood of WMDs (_______ _______ _______) from excessive muscle strain and an increased number of stroke repetitions
dull
work-related musculoskeletal disorder
which stones are quarried from mineral deposits, the hard Arkansas stone is used for dental instruments because of its fine abrasive particle size
Natural abrasive stones
what are hard nonmetallic substances impregnated with aluminum oxide, silicon carbide or diamond particles. (ruby stone, carborundum stones, diamond hone)
artificial materials
ceramic aluminum oxide is an example of an ______ _______
artificial material
_____ _____ are metals harder than most dental instrument steel, therefore are capable of sharpening the instrument
steel alloys
what are the two general groups for sharpening stones?
unmounted
mandrel mounted (has a handpiece)
what is RPI?
repetitive injuries
with the grain of a stone, start with ____ and then end with _____
abrasive
fine synthetic stone
stone surface is abrasive and has ______ to grind the blade
crystals
the cutting edges where the lateral and face meet should be a _____ line
THIN
if an instrument reflects light, it is considered ______. this is called the ____ or ____ test
dull
visual or glare test
plastic testing stick, if it catches it is ______
sharp
what is an alternative if a plastic testing stick is not available to check the sharpness of an instrument?
saliva ejector
t/f you may sharpen instruments during appts
true, although time consuming
______ ______ might dry out a natural stone which requires lubrication
steam autoclaving
t/f if a stone needs oil for sharpening, do not sharpen during tx
true!
what are two advantages of a dry stone?
less contamination
not as porous
which stone prevents contamination, no nicks in blade, complete sterilization, and better for use during pt care?
Dry stone
smaller particle size or a _____ _____ abrades or reduces more _______ and produces a finer cutting edge
finer grain
slowly
t/f the cutting edge is a line, and therefore has length but no thickness
true
t/f if an edge is dull, it may be nicked when drawn over a rough surface
true
what is the object in sharpening?
to reshape the cutting edge to a fine line
t/f a dull edge is rounded, and therefore it has thickness
true
sharpening is accomplished by grinding the surface(s) that form the ______ ______
