Dentaltown November 2017 - 117

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1.

2.

The curved-left and -right ultrasonic inserts are designed and best suited to:
(a) Adapt to convex root anatomy; (b) adapt to concave root anatomy;
(c) remove biofilm and light hard deposit; (d) remove moderate-to-heavy
hard deposit.
A. Only (a), (c) and (d) are correct.
B. Only (a) and (d) are correct.
C. Only (b) (c) and (d) are correct.
D. Only (b) and (c) are correct.
Correct adaptation is when the working end of an insert is positioned to
conform to the morphology of the tooth surface. When correctly adapted, the
entire length of the insert will be in contact with the root surface.
A. Both statements are true.
B. Both statements are false.
C. The first statement is true and the second statement is false.
D. The first statement is false and the second statement is true.

3.

True or false? A curved-right ultrasonic instrument is best used on the
patient's right side and a curved-left ultrasonic instrument is best used on the
patient's left side.
A. True.
B. False.

4.

Key characteristics that should be considered when selecting the most
appropriate ultrasonic instrument for debridement are:
A. Length and diameter.
B. Length and shape.
C. Length, diameter and cross-section.
D. Length, diameter, cross-section and shape.

5.

6.

Where possible, adaptation of the back surface of a curved magnetostrictive
ultrasonic instrument allows the clinician to achieve which periodontal
debridement objective(s)? (a) To conform the convex surface of the instrument
into concave surface of tooth/root structure. (b) Less risk of adaptation of
the point of the ultrasonic instruments into the tooth/root surface. (c) Ideal
access of the distal surface of mandibular and maxillary molars.
A. Only (a).
B. Only (a) and (b).
C. Only (b) and (c).
D. All of the above.
Which group of characteristics best describes contemporary ultrasonic
instrumentation?
A. Thick instrument diameters, moderate-to-heavy calculus removal, instrument contacts cementum or dentin.
B. Thin or ultrathin diameters, focus on biofilm, instrument contacts cementum or dentin.

C.
D.

Thin or ultrathin diameters, focus on biofilm, debridement to completion
not possible without the use of manual instruments.
Thick, thin or ultrathin diameters, focus on biofilm, instrument contacts
cementum or dentin.

7.

Which statement best describes how a clinician should determine which
surface of a piezoelectric ultrasonic instrument is best to use to contact
tooth, root, calculus or biofilm?
A. Assume the point, back, face and lateral surfaces are active.
B. Assume the lateral surfaces and point are active.
C. This will depend on how many millimeters of the instrument have worn.
D. Check the manufacturer's directions for use.

8.

From the list below, choose the statement that is incorrect.
A. An ultrasonic instrument worn beyond the manufacturer's suggested level removes calculus just as quickly as an ultrasonic instrument that is not
worn beyond the manufacturer's suggested level.
B. An ultrasonic instrument worn beyond acceptable levels can contribute to
patient sensitivity.
C. Using a thin ultrasonic instrument on moderate-to-heavy calculus consistently can lead to quicker instrument wear/replacement.
D. Manufacturers recommend that once 75 percent of the original active tip of
an ultrasonic instrument is worn, it should be replaced.

9.

Choose the statement which best suggests the debridement rationale for the
removal of light calculus and biofilm.
A. Straight thin or ultrathin instruments are always best suited for debridement of anterior teeth.
B. Straight thin or ultrathin instruments are always best suited for debridement of anterior teeth, and curved thin instruments are better suited for
posterior teeth.
C. Straight slim instruments are the best choice for pockets 4mm or less on
anterior teeth.
D. Regardless of the location (anterior or posterior) or the depth of the
debridement site, root anatomy should guide the instrument selection
process.

10. Conservation of the tooth/root surface is an objective of periodontal
debridement. Manual instruments and ultrasonic instruments are equal in
their ability to preserve root structure.
A. Both statements are true.
B. Both statements are false.
C. The first statement is true and the second statement is false.
D. The first statement is false and the second statement is true.

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or more continuing education courses does not provide sufficient information to qualify participant as an expert in the field related to the course topic or in any specific technique or
procedure. The instructional materials are intended to supplement, but are not a substitute for, the knowledge, expertise, skill and judgment of a trained health-care professional.
Licensure: Continuing education credits issued for completion of online CE courses may not apply toward license renewal in all licensing jurisdictions. It is the responsibility of each
registrant to verify the CE requirements of his/her licensing or regulatory agency.


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Table of Contents for the Digital Edition of Dentaltown November 2017

Dentaltown November 2017 - Intro
Dentaltown November 2017 - Cover1
Dentaltown November 2017 - Cover2
Dentaltown November 2017 - 1
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Dentaltown November 2017 - Cover3
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http://www.nxtbook.com/farran/dentaltown/2013december
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