curettes clinical application guide
DESCRIPTION
Hu-Friedy Universal and Gracey Curettes - Clinical Application GuideTRANSCRIPT
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CurettesClinical Application Guide
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Curettes
• In this tutorial you will learn:– Types of curettes– Curette blade designs– Curette instrumentation– Clinical uses of curettes
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Types of Curettes
• A curette is a type of scaler that is designed for moderate calculus removal on supragingival and subgingival surfaces.
• Types of Curettes:– Universal– Area Specific (Gracey)
• All curettes share the same common elements:– Rounded back– Rounded toe– Semi-circular cross section
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Curettes
Universal Curettes
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Universal Curettes
• Universal curettes are designed for easy adaptation on all tooth surfaces (thus the name “universal”).
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Universal CurettesThe blade of a universal curette has a round toe and back, and two cutting edges for scaling, making it an efficient design for scaling the entire mouth.
Toe
Face
CuttingEdge
LateralSide
Back
90°
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Universal Instrumentation• The blade is correctly adapted when the toe is directed
interproximally and the terminal shank is parallel to the tooth.
• To remove deposits, the cutting edge is applied to the tooth surface and the facial surface of the blade is tilted toward the tooth to achieve a 70-85° angle between the tooth and the blade.
• Apply lateral pressure against the tooth and pull upward while maintaining contact with the tooth.
Pull StrokeLateral Pressure
70-85°
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Anterior Universal• To scale the facial surfaces, place the toe of the blade
toward the proximal surface with the handle parallel to the tooth.
• Apply strokes to remove deposits from the midline of the tooth to the proximal surface.
• Work from canine to canine.
• Switch working ends and repeat for surfaces away from you.
• Repeat all of the above for the lingual surfaces.
SBH5/67
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Universal Curettes
Anterior Universal Instrumentation Sequence
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Posterior Universal
• Begin at the distal line angle of the most posterior tooth.
• Direct the toe of the blade toward the distal with the terminal shank angled slightly toward the tooth.
• Apply strokes from the line angle to the contact area.
• Next, turn the toe toward the mesial to scale the buccal and mesial surfaces.
• Continue this sequence to complete the posterior region.
• Switch ends and repeat from the lingual aspect.
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Posterior Universal
Posterior Universal Instrumentation Sequence
SC4R/4L6
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Curettes
Area Specific (Gracey) Curettes
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Gracey Curettes
• In the early 1940’s, Dr. Clayton Gracey and Hu-Friedy introduced a set of instruments designed to be used on specific tooth surfaces that improve adaptation and deposit removal.
• The Gracey “area specific” designs have laid the groundwork for the new instruments of today.
• Today, the Gracey Curette family of instruments give clinicians many options for their treatment needs.
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Gracey Curettes
• The Gracey blade design is offset from the terminal shank at 70°.
• This creates one cutting edge which is referred to as the lower edge.
Back
Face
Toe
Cutting Edge
Lateral Side
°
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Gracey Instrumentation
• The blade of a Gracey Curette is correctly adapted when the lower cutting edge is against the tooth and the terminal shank is parallel to the tooth surface being scaled.
• Apply lateral pressure against the tooth (root) and pull upward, maintaining the parallel shank.
Pull StrokeLateral Pressure
70°
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Gracey Curettes
The shank design is different for each Gracey pattern.
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Gracey Curettes
Gracey Curettes are available in:• Standard • Rigid • After Five • Mini Five
The following slides will explain each of these in more detail.
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Standard Gracey Curettes
• Gracey Curettes are area specific to allow for deep scaling, root planing and periodontal debridement.
• The offset blade provides a perfect working angulation for the tooth surface.
• Gracey Curettes are used in a set to completely scale the dentition.
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Shank Design and Diameter
Blade Length
Blade Width
Available Patterns & Areas of Use(Chart on next slide)
Standard (Finishing)
SG#/#
Standard Standard Standard 1/2, 3/4, 5/6, 7/8, 9/10, 11/12, 15/16, 13/14, 17/18*
Rigid
SGR#/#R
Standard design, increased shank diameter
Standard Standard 1/2, 3/4, 5/6, 7/8, 9/10, 11/12, 15/16, 13/14, 17/18*
After Five
SRPG#/#
Longer terminal shank, standard diameter
Standard Decreased by 10%
1/2, 3/4, 5/6, 7/8, 11/12, 15/16, 13/14
Rigid
After Five
SRPG#/#R
Longer terminal shank, increased diameter
Standard Decreased by 10%
1/2, 3/4, 5/6, 7/8, 11/12, 15/16, 13/14
Mini Five
SAS#/#
Longer terminal shank, standard diameter
Decreased by 50%
Decreased by 10%
1/2, 3/4, 5/6, 7/8, 11/12, 15/16, 13/14
Rigid
Mini Five
SAS#/#R
Longer terminal shank, increased diameter
Decreased by 50%
Decreased by 10%
1/2, 3/4, 5/6, 7/8, 11/12, 15/16, 13/14
Gracey Design Comparisons
* The 17/18 is a unique pattern, having a longer terminal shank and slightly shorter blade, so no AF or MF are available.
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Gracey Chart
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Standard Gracey Curettes
7/8 11/12
15/16 17/18
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Rigid Gracey Curettes
• All Gracey designs are available with a wider taper – rigid shank.
• The rigid shank may be preferred for heavier calculus removal.
• Although the shank is wider, the blade width is the same as the standard Gracey.
Standard Rigid
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After Five® Gracey Curettes
• Designed for instrumentation in deeper periodontal pockets.
• The terminal shank is elongated 3mm to provide better clearance around crowns, and superior access to root contours and pockets 5mm or more in depth.
• Blade thinned by 10% to ease gingival insertion and reduce tissue distention.
3mm
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Gracey After Five Curettes
The change in the location of the shank bend permits deeper insertion into periodontal pockets. The thinned blade allows for easier insertion.
SRPG11/12
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Mini Five® Curettes
• Designed with the same elongated terminal shank and thinned blades as the After Five Gracey Curettes.
• 50% shorter blade for access to smaller roots, narrow pockets, furcations, and developmental grooves.
StandardAfter FiveMini Five
3mm
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Gracey Mini Five Curettes
Mini Five reaching into a deep pocket on a narrow root.
SAS1/2
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Hu-Friedy Curettes
• Hu-Friedy offers an array of curettes.
• Many designs are available with different handle options and in Hu-Friedy’s EverEdge Technology.
• Please refer to the Hu-Friedy catalog at www.hu-friedy.com for more information on all the curettes available.
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Qualifying Question
• Thank you for taking the time to learn more about the clinical applications of curettes.
• To earn your Hu-Points towards a product evaluation, please exit and answer the following question on the Member Resources Page:
The After Five Gracey Curette has a terminal shank ___ longer and a blade thinned____ than a Standard Gracey Curette.
a) 3mm, 10%b) 3mm, 15%c) 4mm, 10%d) 4mm, 15%e) 5mm, 15%