Sharp or Sorry
Feel the Edge
Slip-ups & Fix-ups
Edge-ucation
Sharpening Rocks
100
Using sharp instruments reduces the likelihood of creating this unwanted hard, smooth deposit
What is burnished?
100
An inexpensive tool used to check sharpness
What is a sharpening stick or test stick?
100
When the internal angle is less than 70 degrees, the blade becomes weak and dulls quickly
What is too much angulation?
100
70-80 degree angle formed by the face and the lateral side
What is the internal angle of the instrument?
100
The sharpening tool pictured
What is a sharpening horse or pony?
200
Using dull instruments increases the likelihood of creating these excessive strain injuries
What are work-related musculoskeletal disorders?
200
The sound made when an instrument is sharp
What is a "clicking" sound?
200
when the internal angle is greater than 80 degrees
What is not enough angulation?
200
110 degree angle formed by the face of the instrument and the sharpening stone
What is the external angle?
200
unsupported metal fragments that extend beyond the cutting edge from the lateral side or face of the blade
What are wire edges?
300
When a cutting edge is dull, you may notice this visual clue as you inspect it under good lighting
What is reflected light?
300
this test for instrument sharpness occurs when multiple strokes and/or excessive pressure are needed to remove calculus
What is a performance test?
300
In the image depicted, there has been excessive sharpening on this aspect of the instrument leading to a thin working end.
What is the face?
300
the technique used to sharpen when the instrument is not sterile
What is stationary stone?
300
Can be natural or synthetic
What is an India stone
400
Sharp instruments improve this ability to distinguish tooth surface texture
What is tactile sense?
400
Dull instruments do not do this when correctly adapted
What is "grab" or "bite"?
400
Used when a broken metal fragment can be seen
What is a gauze square
400
this principle of instrumentation is improved with a sharp instrument, thus reducing clinician fatigue
What is grasp?
400
the different shapes of sharpening stones (4)
What are slab, wedge, cylindrical, and conical?
500
A line without width
What is a sharp edge?
500
This knife got its name because American soldiers had difficulty pronouncing its Swiss-German name
What is the Swiss Army Knife?
500
The sharpening tool depicited in the image
What is the sharpenator?
500
to have perfected over time or sharpened
What is honed?
500
used for routine sharpening with fine to extra-fine grit and requires oil-lubrication
What is an Arkansas stone?