when sharpening, the instrument should be placed in what hand for stabilization? which grasp?
the non-dominant. palm grasp
the instrument when sharpening should be placed ____ enough for the clinician to see the ____ _____
low
cutting edges
the instrument when sharpening should be ____ with the floor
parallel
cutting edges of an instrument begin at the ___ shank
lower
t/f the cutting edges are parallel until they converge
true
the stone should be first placed _______ with the floor before sharpening at the ____ third of the cutting edge. from ___ degree angle with the face of the instrument, open the stone to make an angle of ____ degrees
perpendicular
shank
90
110
the stone should remain in _____ with the blade at all times, while the strokes should be about ____ inch high
contact
1/2
where should more pressure be placed? on the up or down stroke of the stone
DOWN
each area of sharpening should be finished with a _____ stroke (thats what he said)
down
for the universal curet, follow the cutting edge to where the curvature for the toe begins, applying ___ or ___ strokes ________ each ___ of the cutting edge
3 or 4
overlapping
mm
the portion of the cutting edge nearest the ___ is applied first when using a flat stone, moving the instrument
shank
t/f you need a fulcrum when using a stationary flat stone
true
what kind of pressure should be applied with stationary flat stone/moving instrument sharpening?
moderate to light but firm pressure
what is the arkansas tapered cone recommended for?
curved cutting edges of scalers and curets
what is the carborundum, coarser gain useful for?
preliminary shaping or resharpening of dull instruments, with a finer stone to follow
what are the three disadvantages of a power driven sharpening system?
1. inconsistent due to variations of speed and difficult stabilizing during sharpening
2. excess reduction of instrument during shorter period of use. less conservative
3. frictional heat may affect temp of steel
what are tangled files for?
sharpening files
two angular surfaces of the file meet to form what shape?
"V"
how many passes using the tangled file is neccessary?
2-3
how many surfaces does the hoe have to be ground?
one (doller hoe!)
magnification is needed for sharpening the ___ and the _____
hoe
file
which direction should the teeth of a file be facing for sharpening?
up
when sharpening a hoe, the relationship of the surface to the stone should be a ___ degree bevel
45 degree
t/f corners of a hoe need to be rounded
true
sharpening for a chisel is similar to a ____
hoe
if an explorer is dull, the tip is ______
rounded
what can be used to recontour a bent tip of an explorer?
recontour
the tip of the explorer should be what degrees to the stone?
15-20 degrees
how do you prepare an arkansas stone for sterilization?
submerge in ultrasonic cleaner or scrub with soap and hot water to remove metal particles from sharpening
what can be used on an arkansas stone to remove discoloration?
ammonia
gasoline
kerosene
what if the arkansas stone becomes glazed by metal particles into the surface?
rub the stone over emery paper on a flat solid surface
what should the tanged file be cleaned?
wipe with a sterile gauze soaked in isopropyl alcohol after each use and sterilized in a dry heat oven or chem vapor sterilizer
t/f the tanged file corrodes easily when exposed to moisture
