debridement instruments: sickles and curets

All of the following statements about universal curets is true except

_____.

• Option A

  the universal curet can remove small- and medium-sized calculus deposits

• Option B

  the universal curet can remove supragingival calculus and subgingival calculus

• Option C

  the universal curet is the instrument of choice for root surface debridement

• Option D

  the universal curet can be used for periodontal debridement in the anterior and posterior

Option C

the universal curet is the instrument of choice for root surface debridement

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the distolingual surface of a mandibular premolar?

• Option A

  Gracey 11/12

• Option B

  Gracey 7/8

• Option C

  Gracey 13/14

• Option D

  Gracey 1/2

Option C

Gracey 13/14

Your classmate, Paz, is having trouble removing calculus and asks you to observe her working in clinic. Which of the following technique errors could cause problems with calculus removal?

1 - The wrong clock position

2 - The wrong patient position

3 - Incorrect grasp

4 - Bent fulcrum finger

5 - Incorrect angulation

6 - Incorrect adaptation

• Option A

  All of the errors listed

• Option B

  3, 5, 6

• Option C

  5 and 6

• Option D

  4, 5, 6

Option A

All of the errors listed

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the mesial surface of a mandibular molar?

• Option A

  Gracey 13/14

• Option B

  Gracey 11/12

• Option C

  Gracey 1/2

• Option D

  Gracey 7/8

Option B

Gracey 11/12

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the distal surface of a central incisor?

• Option A

  Gracey 11/12

• Option B

  Gracey 1/2

• Option C

  Gracey 13/14

• Option D

  Gracey 7/8

Option B

Gracey 1/2

Which of the following stroke directions is most commonly used with a sickle scaler on the facial and lingual surfaces of the crowns of molar teeth?

• Option A

  Vertical

• Option B

  Oblique

• Option C

  Horizontal

• Option D

  Circumferential

Option B

Oblique

While working on the facial surface of a molar, you notice that the terminal shank is “down and around” the tooth. What should you do in this situation?

• Option A

  Rise up on your fulcrum so the shank runs in an oblique direction

• Option B

  Flip the instrument and use the other end

• Option C

  Continue working because that is how the terminal shank should look

• Option D

  Roll the instrument and use the other cutting edge

Option B

Flip the instrument and use the other end

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the facial surface of a canine?

• Option A

  Gracey 7/8

• Option B

  Gracey 13/14

• Option C

  Gracey 11/12

• Option D

  Gracey 1/2

Option D

Gracey 1/2

How can you determine the correct working-end of the universal curet on a posterior tooth?

• Option A

  The lower shank is parallel to the distal surface

• Option B

  The outer cutting edges are farther from the instrument handle

• Option C

  The correct end does not show as much face when placed against the tooth surface

• Option D

  All of the choices are correct

Option D

All of the choices are correct

Which of the following stroke directions is most commonly used with the anterior sickle scaler while instrumenting the interproximals of mandibular anterior teeth?

• Option A

  Vertical

• Option B

  Horizontal

• Option C

  Oblique

• Option D

  Circumferential

Option A

Vertical

Which of the following are design characteristics of an area-specific curet?

1 - Face is perpendicular to the lower shank

2 - Face offset at 70 degrees to lower shank

3 - One working cutting edge per working-end

4 - Two working cutting edges per working-end

• Option A

  2 and 4

• Option B

  1 and 3

• Option C

  2 and 3

• Option D

  1 and 4

Option C

2 and 3

Which of the following describes an effective sequence for using a sickle scaler on the facial of mandibular anterior teeth?

• Option A

  Divide the teeth at the midline and scale surfaces toward and surfaces away.

• Option B

  Divide the teeth in four sections as you overlap strokes.

• Option C

  Begin with all of the distal surfaces first, then scale the mesial surfaces.

• Option D

  Use the same cutting edge for all of the facial surfaces.

Option A

Divide the teeth at the midline and scale surfaces toward and surfaces away.

One of the design characteristics of a universal curet is that it has a _____ shank.

• Option A

  short

• Option B

  complex

• Option C

  straight

• Option D

  simple

Option B

complex

Page wants to obtain correct adaptation of a universal curet on the distal surface of the mandibular first molar. What visual clues should she look for to determine that she has established correct adaptation?

• Option A

  Lower shank should extend across the facial surface

• Option B

  Lower shank should be tilted slightly away from the distal surface

• Option C

  Lower shank should be tilted slightly toward the distal surface

• Option D

  Lower shank should be parallel to the distal surface

Option C

Lower shank should be tilted slightly toward the distal surface

James is about to use a sickle scaler. What is the function of this instrument?

• Option A

  Remove large subgingival calculus deposits

• Option B

  Remove large supragingival calculus deposits

• Option C

  Detect the texture and character of tooth surfaces

• Option D

  Check for bleeding of the gingival tissues

Option B

Remove large supragingival calculus deposits

Marta is examining the working-end of a periodontal instrument. The instrument has a rounded toe, rounded back, and one cutting edge that is lower than the other cutting edge. What design classification is this instrument?

• Option A

  Sickle scaler

• Option B

  Explorer

• Option C

  Universal curet

• Option D

  Area-specific curet

Option D

Area-specific curet

Effie is instrumenting the line angle region of a molar tooth with a sickle scaler. To maintain adaptation, Effie should _____.

• Option A

  roll the instrument handle slightly

• Option B

  switch to the other cutting edge of the working-end

• Option C

  use very light lateral pressure against the tooth

• Option D

  use a sickle with a simple shank design

Option A

roll the instrument handle slightly

Isabella is examining the working-end of a periodontal instrument. The instrument has a rounded toe, rounded back, and two cutting edges per working-end. What design classification is this instrument?

• Option A

  Explorer

• Option B

  Area-specific curet

• Option C

  Sickle scaler

• Option D

  Universal curet

Option D

Universal curet

Which of the following situations would be considered an inappropriate use of a sickle scaler?

• Option A

  Removal of subgingival calculus on the mesial of tooth 12

• Option B

  Removal of supragingival calculus on the lingual of tooth 30

• Option C

  Removal of supragingival calculus on the buccal of tooth 3

• Option D

  Removal of supragingival calculus on the distal of tooth 24

Option A

Removal of subgingival calculus on the mesial of tooth 12

Martin is going to debride the distal surface of a molar tooth. Which of the following curets should he select for this task?

• Option A

  Gracey 7/8

• Option B

  Gracey 11/12

• Option C

  Gracey 9/10

• Option D

  Gracey 13/14

Option D

Gracey 13/14

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the lingual surface of a premolar?

• Option A

  Gracey 11/12

• Option B

  Gracey 13/14

• Option C

  Gracey 1/2

• Option D

  Gracey 7/8

Option A

Gracey 11/12

Which of the following are not design characteristics of an area-specific curet?

1 - Semicircular cross section

2 - Face parallel to lower shank

3 - Two working cutting edges per working-end

4 - Curved cutting edges

• Option A

  1 and 2

• Option B

  1 and 3

• Option C

  2 and 4

• Option D

  2 and 3

Option D

2 and 3

Juan wants to obtain the correct adaptation of a sickle scaler on the distal surface of the mandibular first molar. What visual clues should he look for to determine that he has established correct adaptation?

• Option A

  Lower shank should be tilted slightly toward the distal surface.

• Option B

  Lower shank should extend across the facial surface.

• Option C

  Lower shank should be tilted slightly away from the distal surface.

• Option D

  Lower shank should be parallel to the distal surface.

Option A

Lower shank should be tilted slightly toward the distal surface.

Fidel is about to use a universal curet. What is the function of this instrument?

• Option A

  Detect the texture and character of tooth surfaces

• Option B

  Remove medium-sized subgingival calculus deposits

• Option C

  Remove large-sized supragingival calculus deposits

• Option D

  Check for bleeding of the gingival tissues

Option B

Remove medium-sized subgingival calculus deposits

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the distal surface of a molar tooth?

• Option A

  Gracey 1/2

• Option B

  Gracey 7/8

• Option C

  Gracey 11/12

• Option D

  Gracey 13/14

Option D

Gracey 13/14

Which of the following is not a design characteristic of a sickle scaler?

• Option A

  A pointed tip

• Option B

  One cutting edge per working-end

• Option C

  Face is perpendicular to the lower shank

• Option D

  Level cutting edges on a working-end

Option B

One cutting edge per working-end

Which part of the working-end of a sickle scaler is used for calculus removal?

• Option A

  Tip-third of cutting edge

• Option B

  Tip-third of cutting edge and pointed tip

• Option C

  Pointed tip

• Option D

  Half of the cutting edge

Option A

Tip-third of cutting edge

Li is getting ready to initiate a calculus removal stroke with a sickle scaler. Which of the following correctly describes the type of lateral pressure that Li should apply?

• Option A

  Light pressure against the tooth surface

• Option B

  In contact with the tooth surface, but no pressure

• Option C

  Moderate pressure against the tooth surface

• Option D

  Very heavy pressure sufficient to gouge the tooth surface

Option C

Moderate pressure against the tooth surface

A sickle scaler with a straight, simple shank is a(n) _______.

• Option A

  anterior sickle

• Option B

  posterior sickle

• Option C

  either of the listed instruments

• Option D

  neither of the listed instruments

Option A

anterior sickle

When making a stroke the instrument handle moves slightly away from the tooth surface being instrumented. For correct angulation with sickle scalers, the lower shank must be tilted slightly toward the tooth surface.

• Option A

  Both statements are true.

• Option B

  The first statement is true; the second statement is false.

• Option C

  The first statement is false; the second statement is true.

• Option D

  Both statements are false.

Option A

Both statements are true.

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the mesial surface of a mandibular molar?

• Option A

  Gracey 7/8

• Option B

  Gracey 13/14

• Option C

  Gracey 1/2

• Option D

  Gracey 11/12

Option D

Gracey 11/12

An anterior sickle scaler has a rounded toe. One working-end is used for the facial surfaces and the opposite working-end is used for lingual surfaces.

• Option A

  The first statement is true; the second statement is false.

• Option B

  Both statements are false.

• Option C

  The first statement is false; the second statement is true.

• Option D

  Both statements are true.

Option B

Both statements are false.

Which of the following correctly describes the character of the instrumentation strokes used for calculus removal with a sickle scaler?

• Option A

  Flowing strokes, very short in length

• Option B

  A short biting stroke

• Option C

  Flowing strokes of moderate length

• Option D

  Powerful strokes, long in length

Option B

A short biting stroke

When correctly angulated the lower shank of a universal curet and an area-specific curet would have the same relationship to the tooth surface. Several Gracey curets would be needed to instrument the posterior teeth.

• Option A

  The first statement is false; the second statement is true.

• Option B

  The first statement is true; the second statement is false.

• Option C

  Both statements are false.

• Option D

  Both statements are true.

Option A

The first statement is false; the second statement is true.

Sheryl wants to select the correct working-end of a double-ended area-specific curet for an anterior tooth. What visual clue should she look for to select the correct end?

• Option A

  Lower shank should be parallel to the distal surface

• Option B

  Face tilts slightly away from the facial surface

• Option C

  Face tilts slightly toward the facial surface

• Option D

  Lower shank should be parallel to the mesial surface

Option C

Face tilts slightly toward the facial surface

Which of the following are design characteristics of a universal curet?

1 - Face is perpendicular to the lower shank

2 - Face off set at 70 to 80 degrees to lower shank

3 - One cutting edge per working-end

4 - Two cutting edges per working-end

• Option A

  2 and 3

• Option B

  1 and 3

• Option C

  1 and 4

• Option D

  2 and 4

Option C

1 and 4

Alberto has positioned the working-end of a sickle scaler apical to (beneath) a large supragingival calculus deposit. Which of the following is the recommended angulation for a calculus removal stroke with a sickle scaler?

• Option A

  50 to 70 degrees

• Option B

  60 to 70 degrees

• Option C

  70 to 80 degrees

• Option D

  0 to 40 degrees

Option C

70 to 80 degrees

Put the following steps for calculus removal in the correct sequence.

1. My patient

2. Me (operator positioning)

3. My stabilization

4. My adaptation

5. My finger rest

6. My angulation

7. My activation

8. My equipment

• Option A

  2.1.8, 5, 4, 6, 3, 7

• Option B

  7, 4, 2, 6, 1, 3, 8, 5

• Option C

  3, 6, 1, 5, 8, 2, 4, 7

• Option D

  5, 2, 7, 1, 4, 8, 6, 3

Option A

2.1.8, 5, 4, 6, 3, 7

Shino wants to select the correct working-end of a double-ended universal curet for an anterior tooth. What visual clue should she look for to select the correct end?

• Option A

  Lower shank does not go across the tooth surface

• Option B

  Lower shank should be parallel to the mesial surface

• Option C

  Lower shank goes across the tooth surface

• Option D

  Lower shank should be parallel to the distal surface

Option C

Lower shank goes across the tooth surface

Blair wants to adapt the working-end of an area-specific curet to a molar tooth. Which of the following design characteristics must she be aware of to obtain correct adaptation of the area-specific curet?

• Option A

  Back is rounded

• Option B

  Two cutting edges per working-end

• Option C

  Cutting edges meet in a rounded toe

• Option D

  Face is tilted in relationship to lower shank

Option D

Face is tilted in relationship to lower shank

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the mesiofacial surface of a maxillary molar?

• Option A

  Gracey 13/14

• Option B

  Gracey 11/12

• Option C

  Gracey 7/8

• Option D

  Gracey 1/2

Option B

Gracey 11/12

Assume your instrument set contains the following selection of area-specific curets. Which area-specific curet should be used on the facial surface of the mandibular anteriors?

• Option A

  Gracey 1/2

• Option B

  Gracey 11/12

• Option C

  Gracey 7/8

• Option D

  Gracey 13/14

Option A

Gracey 1/2