module 10-adaptation
TRANSCRIPT
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Module 10—Technique
Essentials: Adaptation
Section 1
Adaptation of the Working-End
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Definition
Adaptation is the positioning of the first 1 to 2 mm of the working-end’s lateral surface in contact with the tooth.
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Adaptation of an Explorer
-Adaptation of an explorer against the facial surface of a central incisor
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Adaptation of Sickle Scaler
-Adaptation of a sickle scaler to the facial surface of a central incisor
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Leading-Third of Working-End
The Key to Correct Adaptation
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Thirds of Working-End
The working-end has three imaginary sections:
– Leading-third
– Middle-third
– Heel-third
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Leading-Third of a Curet
-The leading-third of a curet working-end is the toe-third
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Leading-Third of a Sickle
-The leading-third of a sickle scaler is the tip-third
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Correct Adaptation
1. For correct adaptation, the toe-third or tip-
third of the working-end is always in contact with the tooth surface.
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Correct Adaptation (cont.)
2. In some cases, both the leading-third and the middle-third of the working-end can be adapted to the tooth.
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Correct Adaptation (cont.)
3. The heel-third of the working-end is NOT adapted to the tooth surface.
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Correct Adaptation (cont.)
-The tip-third of this sickle scaler is correctly adapted to the facial surface
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Incorrect Adaptation
The tip-third is NOT adapted.
The tip is sticking out and could cut the soft tissue.
OUCH!
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Correct or Incorrect?
Is this working-end correctly adapted?
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Correct or Incorrect? (cont.)
Is this working-end correctly adapted?
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Correct or Incorrect? (cont.)
Is this working-end correctly adapted?
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Correct or Incorrect? (cont.)
Is this working-end correctly adapted?
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Adaptation
Adaptation is the positioning of the toe-third or tip-third of the working-end against the tooth
surface.
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Handle Roll for Adaptation
-Correct grasp allows the clinician to precisely control the working-end during instrumentation
-Correct grasp reduces musculoskeletal stress to hands and fingers
-Precise control of rolling the handle requires use of fingertips, not the finger pads, to grasp the handle
-Use the handle roll to position the working-end against the tooth surface
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Neutral Joint Position Using Fingertips
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Hyperextended Joints HinderInstrument Control
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Summary
Correct adaptation of the toe- or tip-third to the tooth surface is essential for effective instrumentation.
Correct adaptation of the working-end prevents injury to the gingival tissue.
Correct grasp of the instrument facilitates rolling the instrument handle for correct adaptation to the tooth surface.
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