instrument sharpening

INSTRUMENT SHARPENINGJenny Dennings, RDH, BSDHOctober 9, 2012

Directions• You will need PowerPoint 2010 to work• You will need internet to view the video• The arrows will take you to the next page• The home button with the “I” on it will take you to the

index page• You must complete each question to move to the next

section• This PowerPoint was created to review your sharpening

techniques and teach you Sharpening Essentials through the Edge System.

IndexObjectives

Advantages

Key Terms

Instrument Design

Armamentarium

Method and Technique

Testing for Sharpness

Sharpening Essential Video Link

Different sharpening systems• You have recently learned how to use the D.I.S.C.

sharpening system. We will not refer to the D.I.S.C. system in this presentation. Another basic way to sharpen your instruments is to use the Edge System: Sharpening Essentials.

Objectives• List the benefits of using instruments with sharp cutting

edges for periodontal instrumentation• Define key terms• Describe design characteristics to be maintained of sickle

scalers, universal curets, and area specific curets• Differentiate visually between sharp cutting edge and dull

cutting edge• Demonstrate a method of determining if a cutting edge is

sharp

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Advantages• Less time for the sharpening procedures• Easier calculus removal• Improved stroke control• Reduced number of strokes• Increased patient comfort and satisfaction• Reduced clinician fatigue• Less re-contouring to maintain a sharp instrument

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Which of the following is not an outcome of using sharp instruments?

A fewer number of instrumentation strokes needed to remove a deposit

Less strain placed on the clinician's fingers, hand, and arm

Reduced likelihood of an instrument stick to the clinician's fingers

Increased chance of trauma to the soft tissues from the sharp edge

I’m sorry your answer is Incorrect.

Please review the Advantages and try

again.

Congratulations!Your answeris correct.

Key Terms• A sharp line that is formed where the lateral sides meet the

face. There is no width.Sharp cutting

edge

• When the metal forming the sharp line is worn away giving it width with a rounded surface. Dull cutting edge

• Using a bright light to check for light reflection. A dull surface is able to reflect light. A sharp surface will not reflect light.

Visual evaluation of sharpness

• Placing the cutting edge a sharpening test stick to feel if the instrument slides or catches.

Tactile evaluation of sharpness

• A plastic or acrylic stick made for testing instruments.Sharpening test

stick

Key Terms continued…

• Using birds eye view to see if the lateral sides are straight. i.e. universal curet

Straight cutting edges

• Using birds eye view to see if the lateral sides are curved. i.e. area specific curet

Curved cutting edges

• If instruments are used and kept sharp they will eventually need to be replaced.

Limited use-life

• Natural or synthetic, abrasive particles, removes metal from the instrument.

Sharpening stone

Which of the following terms is defined as "the pointed junction of the instrument face and lateral surface"?

Self-angulated edge

Dull cutting edge

Sharp cutting edge

Wire cutting edge


Please review the Key Terms and try

again.

INSTRUMENT DESIGN

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Review of Instruments in Cassette

Sickle Scalers

Anterior sickle (5/33)

Posterior sickle (204s)

Universal Curets

Columbia 13/14

Columbia 4R/4L

Barnhart 5/6

Areas Specific Curets

Gracey 1/2

Gracey 11/12

Gracey 13/14

Basic Instrument Design

A – Handle, B – Shank, C – Working end

Sickle Scaler (design of working end)

Lateralside

face

Sickle Scaler Characteristics

Pointed back

Pointed tip

Triangular in cross section

Two cutting edges

Face is perpendicular to lower shank

Universal Curet (design of working end)

Universal Curet Characteristics

Round back

Round toe

Two cutting edges

Parallel cutting edges

Semi-circular in cross section

Face is at a 90° angle to the lower shank

Area Specific Curet (design of working end)

Area Specific Curet Characteristics

Round back

Round toe


One working cutting edges


This instrument is triangular shape in cross section?

Sickle Scaler

Universal Curet

Area Specific Curet


Please review Instrument Design and

try again.


The Sickle Scaler is triangular shape in

cross section.

INSTRUMENT DESIGN

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Sickle Scalers



Universal Curets

Columbia 13/14

Columbia 4R/4L

Barnhart 5/6


Gracey 1/2

Gracey 11/12

Gracey 13/14


Lateralside

face


Pointed back

Pointed tip


Two cutting edges



Round back

Round toe

Two cutting edges





Round back

Round toe




This instrument’s face is tilted in relation to the lower shank?

Sickle Scaler

Universal Curet

Area Specific Curet



try again.


The Area Specific Curethas a face that is tilted

in relation to thelower shank.

INSTRUMENT DESIGN

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Sickle Scalers



Universal Curets

Columbia 13/14

Columbia 4R/4L

Barnhart 5/6


Gracey 1/2

Gracey 11/12

Gracey 13/14


Lateralside

face


Pointed back

Pointed tip


Two cutting edges



Round back

Round toe

Two cutting edges





Round back

Round toe




In the picture below, which is the view of the area-specific curet?



try again.


The Area Specific CuretIs second one down.

ARMAMENTARIUM

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Armamentarium

Personal Protective equipment

Gloves Glasses Mask

Armamentarium continuedGood light

Stable work surface

Magnifying glass

Sharpening stone

EdgeMate Disposable Chairside Sharpening Guide

Sterile instruments

Gauze

Where should instrument sharpening should be performed?

In a well-lighted work area in the treatment room

In a room set aside exclusively for instrument sharpening

On the bracket table in the treatment room

In the dental materials laboratory


Please review Armamentarium and

try again.


You need to have properlighting to complete

sharpening.

ARMAMENTARIUM

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Armamentarium

Personal Protective equipment

Gloves Glasses Mask

Armamentarium continuedGood light

Stable work surface

Magnifying glass

Sharpening stone

EdgeMate Disposable Chairside Sharpening Guide

Sterile instruments

Gauze

Personal Protective Equipment (PPE) is required while sharpening instruments.

True

False


Please review Armamentarium and

try again.


You need to wear PPEwhile completing

sharpening.

METHOD AND TECHNIQUE

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Method• Stationary instrument to moving stone method

• Using the Disposable Chairside Sharpening Guide• -Or-• Make a permanent guide with a marker and protractor• The instrument is held stationary• The stone is moved up and down at a constant 110°

110110

Disposable Chairside Sharpening Guide

Position of the Sickle Scaler

Position the instrument face parallel to the countertop.

When positioned with the face parallel to the countertop the lower shanks of the sickle is

perpendicular to the countertop

Position of the Universal Curet

Position the instrument face parallel to the countertop

When positioned with the face parallel to the countertop the lower

shanks of the universal curet instruments are perpendicular to

the countertop

Positioning the Area Specific

For area specific curets the face is

parallel to the countertop, but the lower shank is not


Divide the cutting edge into three imaginary sections

Sharpen in sections

Adapt the cutting edges to only a portion of the cutting edge at a time to maintain

cutting edges

Start at the heel and work to the toe

Recontouring

Recontour toe and back to

keep smooth round

surfaces

Removing Metal Burs

Sharpening can create metal burs that come

from cutting edge. This can result in gouging the cementum. Burs can be avoided by

finishing with a down stroke

Position the instrument face of the Universal Curet

Align with the dotted line on the sharpening guide

Align sharpening stone with the solid line

Adapt the stone to the heel third of the cutting edge

Instruments with two cutting edges

Both sides are sharpened the same way.

Sharpen the toe

Recontour the back

Metal burs projecting from the cutting edge can usually be prevented during sharpening by _____.

Positioning the face parallel to the countertop

Stabilizing the hand holding the instrument on a countertop

Finishing a series of sharpening strokes on a down stroke

Holding the stone on the lower third of the stone


Please review Methods and

try again.


By finishing with a down stroke this will prevent metal burs.


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110110





the countertop

Positioning the InstrumentFor area specific curets the face is



Sharpen in sections


cutting edges


Recontouring


keep smooth round

surfaces

Removing Metal Burs




Sharpen the toe

Recontour the back

When sharpening with a stationary instrument and moving stone, the stone is angled at _____ degrees.

7090110120



try again.


The stone is movedin an up and down

motion at 110°.


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110110





the countertop

Positioning the InstrumentFor area specific curets the face is



Sharpen in sections


cutting edges


Recontouring


keep smooth round

surfaces

Removing Metal Burs




Sharpen the toe

Recontour the back

Only the toe (tip) 1/3 of the working end is sharpened when dull.

True

False



try again.


When sharpening, start with the back

then the middle third to the toe.

TESTING FOR SHARPNESS

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Tactile evaluation

The preferred way is with a test stick

Visual evaluation

Sharp cutting edgeDull cutting edge

When evaluated visually, a sharp cutting edge will _____.

Not reflect light

Sparkle like a diamond

Reflect light

Appear as a long shiny line


Please review Testing for sharpness

and try again.


A sharp instrumentwill not reflect light.

Video to review: Edge Sharpening System

(I originally had the video in the PowerPoint but the file was to big.)I

http://desica.dent.umich.edu/video/hygiene/SharpeningEssentials1.mov

http://desica.dent.umich.edu/video/hygiene/SharpeningEssentials1.mov

Summary• Becoming proficient in the Sharpening Essential

Technique will save dental hygienists time, money and energy.

• A sharpening technique should remove a minimum amount of metal from the instrument and maintain the original design characteristics of the working-end

• You are required to complete two hands on proficiencies in clinic during the semester.

THANK YOU!

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Bibliography• Jill S. Neild-Gehrig, R. M. (2008). Fundamentals of

Periodontal Instrumentation and Advanced Root Instrumentation. Philadelphia: Lipponcot, Williams, and Wilkins.

instrument sharpening

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