module 10-adaptation

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Module 10—Technique

Essentials: Adaptation

Section 1

Adaptation of the Working-End

Copyright © 2017 Wolters Kluwer • All Rights Reserved

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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3. The heel-third of the working-end is NOT adapted to the tooth surface.

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-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.)


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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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module 10-adaptation

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