Preclinical Instrument Sharpening

dull instruments

Periodontal debridement cannot be achieved using:

sharp instruments

Easier calculus removal, Improved stroke control, Increased patient comfort, and reduced clinician fatigue are all advantages of:

sharp cutting edge

a fine line formed where the face and lateral surface meet

dull cutting edge

when metal is worn away, making the cutting edge a rounded surface

visual evaluation

Sharp edge is a line with no thickness and does not reflect light

Dull edge has thickness and reflects light

tactile examination

Use a test stick

Dull cutting edge will slide over the surface and Sharp cutting edge will bite

sharpening stones

Have various grain or abrasiveness

Used with a lubricant to reduce friction

cross sections

The key to understanding sharpening is to visualize the working end in:

original

A minimum amount of metal should be removed, with _____ design characteristics maintained

80 degrees

Bulky working-end not able to remove calculus is made when the stone contacts he lateral surface at an angle greater than:

70 degrees

The working-end is weakened when stone contacts lateral surface at an angulation less than:

toe, middle, and heel

Divide into three imaginary sections:

heel

What is the first section of the instrument sharpened

middle

What is the second section of the instrument sharpened

toe

What is the third section of the instrument sharpened

thumb

Use a palm grasp, Stabilize hand on countertop, Stabilize instrument handle with your:

parallel

Position the Instrument Face _____ to the countertop

perpendicular

Position the instrument terminal shank _____ to the countertop

edges

Hold the stone on the _____ so that your fingers do not get in the way when sharpening

70-80

Angulation between instrument face and sharpening stone should be between _____ degrees

up, down

Sharpening stone is positioned against the lateral surface: move stone ___ and ____ to sharpen

downward

Finish sharpening with ______ stroke to avoid burs

burs

After sharpening, metal ___ create a wire edge

gauze

What is used to remove metal burs from the instrument after sharpening?