Module 17- Universal Curets
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Transcript of Module 17- Universal Curets
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Module 17—Universal Curets
Section 3Technique Practice—Posterior Teeth
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Posterior Sextants
Use of a Universal Curet
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Topics
-Choosing the correct working-end-Establishing angulation-Step-by-step use of a universal curet on the posterior teeth
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Choosing the Correct Working-End
Double-Ended Universal Curet
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Two Working-Ends
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Methods
There are two methods that can be used to pick the correct working-end for use on a tooth surface.It does not matter which method you use.Use the one that is easiest for you!
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Method 1
Lower Shank as Visual Clue
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Procedure
Establish a finger rest.Place the working-end in the Get Ready Zone of the distal surface. Use the lower shank as a visual clue.
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Lower Shank as Visual Clue
-Lower shank is parallel to the distal surface-Functional shank goes up and over the tooth
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Incorrect Working-End
-Lower shank not parallel-Functional shank is down and around the tooth
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Memory Aid
Think: “Posterior = Parallel”Functional shank up and over
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Method 2
Inner and Outer Cutting Edges
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Procedure
Hold the instrument so that you are looking down at the face.Determine which cutting edge is closer to the handle.
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Identify the Cutting Edges
Because of the bend in the shank, one cutting edge is closer to the handle.Which one?
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Identify the Cutting Edges (cont.)
Inner = closer to handleOuter = farther from handle
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Cutting Edge Use
Inner cutting edges: used on distal surfacesOuter cutting edges: used on facial, lingual, and mesial surfaces
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Memory Aid
Think: “I start in on the distal surface, then move out to the facial and mesial.”
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Establishing Angulation
70- to 80-degree face-to-tooth surface angulation
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Design Alert
The face of the working-end is perpendicular to the lower shank.
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Impact of Design
Positioning the lower shank parallel to the tooth surface creates an incorrect face-to-tooth surface angulation of 90 degrees.
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Correct Angulation
Correct angulation is achieved by tilting the lower shank toward the tooth surface. In this position the face-to-tooth surface angulation is between 70 and 80 degrees.
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Incorrect Angulation
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Correct Angulation
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Application of Cutting Edges
Universal Curet Posterior Sextant
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Working-End Application
Two working-ends and four cutting edges
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Application of Cutting Edges
Cutting edges applied to mandibular first molar and posterior sextant
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Step-by-Step Technique
Universal Curet Posterior Sextant
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Always One Step at a Time
Remember: “Me, My patient, My light, My mirror, My grasp, My finger rest, My adaptation”
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Sequence: Area 1
-From distofacial line angle back and halfway across the distal surface
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Step 1
Place the working-end in the Get Ready Zone near the distofacial line angle.-Toe of working-end “points” toward the distal surface
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Step 2
-Lower handle-Gently insert beneath the gingival margin-Face should hug the tooth surface
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Step 3
-Establish angulation-Lock the toe-third to the tooth surface-Make strokes around the line angle and halfway across the distal surface
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Technique Check
The face should be at a 70- to 80-degree angle to the distal surface.
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Sequence: Area 2
-Distofacial line angle forward for the facial and mesial surfaces
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Step 4
Place the working-end in the Get Ready Zone near the line angle on the facial surface.-Toe “points” forward
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Step 5
Make sure that the face hugs the tooth surface.Gently insert the working-end beneath the gingival margin.
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Step 6
Work across the facial surface.Roll the handle as you approach the mesiofacial line angle.
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Technique Check
Be sure to extend your strokes past the midline of the mesial surface of the tooth.
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Sequence for Sextant
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Maxillary posterior sextant
Universal Curets
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Step 1
-Turn toe toward distal surface-Establish 0-degree angulation and insert
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Step 2
-Establish angulation-Lock the toe-third to the tooth surface
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Step 3
Make strokes around the line angle and halfway across the distal surface.
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Step 4
Place the working-end in the Get Ready Zone near the line angle on the facial surface.-Toe “points” forward
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Step 5
-Work across the facial surface-Roll handle as you approach the mesiofacial line angle
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Step 6
-Work from the mesiofacial line angle to the midline of the mesial surface
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RecapRemember sequence of steps for calculus removal.Use visual clues to select the correct working-end of a universal curet for a posterior sextant.
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