Deck 26: Instrumentation Principles and Techniques

Question 1

Tissue trauma during debridement with a universal curet may occur if

A) Subgingival insertion is used
B) The insertion angle is 50 degrees
C) The cutting edge is too sharp
D) Too much pressure is used

Answer 1

The insertion angle is 50 degrees

Question 2

The cutting edge of an instrument is formed by the convergence of

A) The back and the face
B) The toe and the face
C) The two lateral surfaces
D) The tip and the toe

Answer 2

The two lateral surfaces

Question 3

In a modified pen grasp the middle finger will do which of the following?

A) Act as the fulcrum.
B) Rest on the instrument shank.
C) Securely hold the instrument.
D) Stabilize the instrument.

Answer 3

Rest on the instrument shank.

Question 4

Motion activation is the movement of the instrument to create a stroke on the surface of the tooth.There are two types of motion activation: hand motion activation and wrist motion activation.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 5

A dull periodontal scaling instrument exhibits which of the following properties?

A) Reflects light on cutting edge
B) Requires increased force against the tooth to remove calculus
C) Increases operator hand and wrist fatigue when using it
D) A and C
E) All of the above

Question 6

Which statement best describes the instrument angle that leads to burnished calculus during periodontal debridement?

A) An insertion angle was used.
B) A gingival curettage angle was used.
C) A 45- to 50-degree angle was used.
D) A 90- to 95-degree angle was used.

Question 7

You are performing a periodontal maintenance appointment and choose to use the Gracey 14/15 curet in a periodontal pocket on the mesial of tooth #30.How should the instrument look when it is properly adapted?

A) The terminal shank should be parallel to the long axis of #30.
B) The terminal shank should be diagonal across #30.
C) The terminal shank should be leaning toward the distal of #29.
D) The terminal shank should be horizontal across #30.

Question 8

The most appropriate instrument to remove a large ring of calculus on the lingual of #30 is a

A) File
B) Gracey curet
C) Sickle
D) Universal curet

Question 9

All of the following are disadvantages of horizontal strokes EXCEPT one.Which one is the EXCEPTION?

A) Without careful skill the stroke can damage soft tissues.
B) The strokes are used in areas with several millimeters of clearance.
C) The strokes often require digital activation.
D) The strokes are not always effective on heavy ledges.

Question 10

The most appropriate instrument to debride #12 M with a 6-mm pocket and light deposits is a

A) Gracey curet
B) Mini Gracey curet
C) Posterior sickle
D) Universal curet

Question 11

The most appropriate instrument for the initial stage of periodontal debridement with heavy deposits is an instrument with which shank design?

A) Complex
B) Extra rigid
C) Functional
D) Terminal

Question 12

After sharpening a universal curet multiple times the working end appears to look like a sickle scaler.What factor most likely contributed to this issue?

A) Only one side of the working end was sharpened.
B) Only part of the instrument blade was sharpened.
C) The blade face and stone surface was at a 90-degree value.
D) The blade face was not parallel to the floor.

Question 13

The best treatment to remove biofilm and calculus for a patient with red,swollen papilla; generalized 4- to 5-mm probe depths with localized 6-mm depths; generalized 2- to 3-mm recessions; and moderate bleeding on probing is

A) Adjunctive antimicrobials
B) Gingival curettage
C) Periodontal debridement
D) Scaling and root planning

Question 14

All of the following are parts of an instrument's functional shank EXCEPT one.Which one is the EXCEPTION?

A) Tip
B) Terminal shank
C) Working end
D) Handle

Question 15

A beginning dental hygiene student finds the curet is slipping off the tooth because stabilization of her hand and instrument is not effective.Identify the type of activation most likely contributing to this issue.

A) Digital activation
B) Hand pivot activation
C) Hand roll activation
D) Wrist activation

Question 16

A right-handed dental hygiene student sitting at 8:00 to debride #26 M with a sickle scaler is having difficulty adapting the instrument to the tooth surface.What adjustment should the student make to better adapt the instrument?

A) Reposition the fulcrum finger.
B) Reposition to a 12:00 position.
C) Use an extraoral fulcrum.
D) Use a universal curet.

Question 17

It is important to use instruments with large diameter handles because doing so will help the clinician avoid musculoskeletal hand injuries.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but NOT related.
C) The statement is correct,but the reason is NOT.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 18

A dental hygiene student chooses an instrument with a simple shank to remove deposits in a 5-mm pocket on tooth #3.Which statement best describes why this instrument choice is inappropriate?

A) Correct adaption of the working end is not possible to reach the base of the pocket.
B) Most simple shanks are too rigid to adapt in deep pockets around posterior teeth.
C) Simple shanks are too short to reach the base of the pocket around posterior teeth.
D) Simple shanks have too many bends to reach the base of the pocket around posterior teeth.

Question 19

What is the most likely reason a dental hygiene student may have difficulty accessing #2 DB line angle with a manual instrument during periodontal therapy?

A) The instrument handle is too large.
B) The instrument handle is too small.
C) The instrument is too heavy.
D) The instrument shank is complex.

Question 20

When scaling around the line angle of a tooth a clinician must do what to avoid lacerating the soft tissue?

A) Keep the shank parallel to the tooth scaling surface.
B) Roll the instrument handle between the middle finger and thumb.
C) Maintain the tip or toe of the instrument against the tooth.
D) Open the angle of the instrument larger than 90 degrees.

Question 21

All of the following are characteristics of a file EXCEPT one.Which one is the EXCEPTION?

A) Files have one cutting edge.
B) A file's cutting edge is identical to the cutting edge of a hoe.
C) Files are used to remove and break large,solid parts of calculus into smaller pieces.
D) Files likely cannot fully remove calculus from the periodontal pocket.

Question 22

Which statement BEST describes a scaling stroke?

A) A stroke used to place the instrument under the gingival margin.
B) A stroke used to explore for the base of the calculus deposit.
C) A stroke used to debride the root surface of the tooth.
D) A stroke used to activate the instrument for calculus removal.