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Quiz two Clinic
Terms in this set (41)
Pinch force can be reduced with
a larger instrument handle.
Ergonomically designed instruments help prevent
carpal tunnel syndrome
For proper adaptation, the leading third, aka the tip-third of the scaler working-end must be in contact with
the tooth surface.
The toe-end & middle third of a curet can be adapted to the tooth surface when using
correct adaptation technique.
Adapting the middle-third of the sickle working-end to the tooth results in
When the correct working-end of a posterior instrument is placed between the _______, the lower shank should be parallel to the proximal surface.
first and second premolars
A cross section of a curet is
A cross section of a sickle is
Small-diameter handle instrument design characteristics causes
increased muscle fatigue.
Terminal shank is another name for the
Oblique strokes are most commonly used on the
facial & buccal of posterior teeth.
Horizontal strokes are used in deep narrow pockets of
facial & lingual surfaces of anterior teeth.
An instrument identified as G ½ means it is a Gracey brand that has 2 similar but different working ends.
The working end closest to the 1 is the "1" end, and the working end closest to the 2 is the "2" end.
Technique errors that can cause problems with calculus removal include the
wrong clock position
the wrong patient position
bent fulcrum finger
the face and lateral surface form the
cutting edge on the working end.
The cutting edges of a sickle scaler meet in a
tip and point.
Establish the finger rest for the non-dominant hand before
establishing the finger rest for the dominant hand.
Insert the explorer under the gingiva until the back of the working-end touches the
The act of rotating the hand and wrist as a unit to provide the power for an instrumentation stroke is called
Motion activation is the act of moving the instrument to produce an
The finger used to roll the handle determines the direction in which the
working-end will turn.
The drive finger can be either the
thumb or index finger.
For successful instrumentation, correct adaptation of the working-end must be maintained throughout
the instrumentation stroke.
Establishing a finger rest directly on the occlusal surface provides
Knurling is synonymous with
texturing on an instrument handle.
_____ can be used to remove calculus deposits located above the gingival margin of a mandibular anterior tooth.
A sickle or curet scaler
To roll the instrument handle during adaptation the clinician needs to use the modified pen grasp with fingertips on
Digital motion activation is accomplished by flexing the
thumb, index, and middle fingers.
During motion activation for calculus removal, it is best to keep the ring finger (fulcrum finger) in a
tall & straight position.
Flying off the tooth at the end of a stroke is caused by not using enough ____ on the fulcrum finger.
Most calculus deposits will be detected by
tactile sense, aka sense of feel.
Tactile sensitivity is the clinician's ability to feel things through the instrument
shank and handle.
The assessment stroke is used to evaluate the
tooth or the health of the periodontal tissues.
Instrumentation strokes in a vertical direction commonly are used on
mesial and distal.
The lateral surfaces of an instrument are
below each side of the face and cutting edges.
ability to perform a psychomotor skill smoothly and easily.
Positioning the first 1 to 2 mm of the working-end's lateral surface in contact with the tooth"
definition for Adaptation.
An instrument is balanced when the working ends are aligned with an imaginary line that runs vertically through the center of the handle lengthwise.
When an instrument is balanced, it ensures that the finger pressure against the handle is transferred to the working end.
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