Question 1

Which of the following would you select if the dentist requested a No. 330 bur?

Accepted Answer

A) Round bur 
B) Inverted cone 
C) Pear-shaped bur 
D) Straight fissure-crosscut 
E) Tapered fissure-crosscut 
A) Round bur 
B) Inverted cone 
C) Pear-shaped bur 
D) Straight fissure-crosscut 
E) Tapered fissure-crosscut C

Question 2

Identify the number of the bur that has tapered sides with horizontal cutting edges.

Accepted Answer

A) 157 
B) 168 
C) 330 
D) 699 
E) 701 
A) 157 
B) 168 
C) 330 
D) 699 
E) 701 D

Question 3

Which type of diamond bur is used to reduce a tooth for a crown preparation when a square shoulder is needed?

Accepted Answer

A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder 
A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder D

Question 4

Which of the following are parts of a bur?

Accepted Answer

A) Head 
B) Neck 
C) Shank 
D) All of the above 
A) Head 
B) Neck 
C) Shank 
D) All of the above

Question 5

Which bur forms angles and retention grooves in the walls of a cavity preparation?

Accepted Answer

A) 10 
B) 57 
C) 168 
D) 699 
E) Both C and D are correct. 
A) 10 
B) 57 
C) 168 
D) 699 
E) Both C and D are correct.

Question 6

Darker grit on a composite disc indicates the disc is _______.

Accepted Answer

A) fine 
B) coarse 
C) medium 
D) The color of the grit is not significant. 
A) fine 
B) coarse 
C) medium 
D) The color of the grit is not significant.

Question 7

A bur with a latch at the end of the shank fits into which type of handpiece?

Accepted Answer

A) High-speed 
B) High-speed fiberoptic 
C) Slow-speed straight 
D) Slow-speed contra-angle 
A) High-speed 
B) High-speed fiberoptic 
C) Slow-speed straight 
D) Slow-speed contra-angle

Question 8

Which type of bur is a No. 57?

Accepted Answer

A) Round bur 
B) Inverted cone 
C) Straight fissure-plain cut 
D) Tapered fissure-plain cut 
E) Straight fissure-crosscut 
A) Round bur 
B) Inverted cone 
C) Straight fissure-plain cut 
D) Tapered fissure-plain cut 
E) Straight fissure-crosscut

Question 9

The rotation instrument designed to contour a composite restoration is a

Accepted Answer

A) rubber point. 
B) sandpaper disc. 
C) composite disc. 
D) diamond bur wheel. 
E) Both B and C are correct. 
A) rubber point. 
B) sandpaper disc. 
C) composite disc. 
D) diamond bur wheel. 
E) Both B and C are correct.

Question 10

What does the notation "L" following a bur number indicate?

Accepted Answer

A) For lingual use 
B) Latch 
C) Long 
D) None of the above are correct. 
A) For lingual use 
B) Latch 
C) Long 
D) None of the above are correct.

Question 11

A friction grip bur fits into which type of handpiece?

Accepted Answer

A) High-speed 
B) High-speed fiberoptic 
C) Slow-speed straight 
D) Slow-speed contra-angle 
A) High-speed 
B) High-speed fiberoptic 
C) Slow-speed straight 
D) Slow-speed contra-angle

Question 12

Which of the following burs has parallel sides without horizontal cutting edges?

Accepted Answer

A) Straight fissure bur-crosscut 
B) Tapered fissure bur-plain cut 
C) Tapered fissure bur-crosscut 
D) None of the above 
A) Straight fissure bur-crosscut 
B) Tapered fissure bur-plain cut 
C) Tapered fissure bur-crosscut 
D) None of the above

Question 13

Which of the following is a tapered fissure-plain cut bur?

Accepted Answer

A) 8 
B) 57 
C) 168 
D) 699 
A) 8 
B) 57 
C) 168 
D) 699

Question 14

Which of the following is used to polish restorations, amalgam, composite, and gold?

Accepted Answer

A) Round finishing bur 
B) Flame diamond bur 
C) Brown points 
D) Green points 
E) C and D are both used. 
A) Round finishing bur 
B) Flame diamond bur 
C) Brown points 
D) Green points 
E) C and D are both used.

Question 15

What type of bur is a No. 556?

Accepted Answer

A) Round bur 
B) Inverted cone 
C) Straight fissure-crosscut 
D) Tapered fissure-plain cut 
E) Tapered fissure-crosscut 
A) Round bur 
B) Inverted cone 
C) Straight fissure-crosscut 
D) Tapered fissure-plain cut 
E) Tapered fissure-crosscut

Question 16

Which type of diamond bur is used for a crown preparation when subgingival margins are needed?

Accepted Answer

A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder 
A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder

Question 17

Which type of diamond bur is used to reduce a tooth for a crown preparation on the lingual aspect of anterior teeth and for bulk reduction of incisal edges?

Accepted Answer

A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder 
A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder

Question 18

Which of the following is not a function of a finishing bur?

Accepted Answer

A) Finish composite restoration. 
B) Equilibrate or adjust occlusion. 
C) Finish restoration by restoring anatomy in tooth. 
D) Place retention grooves in walls of cavity preparation. 
A) Finish composite restoration. 
B) Equilibrate or adjust occlusion. 
C) Finish restoration by restoring anatomy in tooth. 
D) Place retention grooves in walls of cavity preparation.

Question 19

Which type of diamond bur is used to reduce a tooth for a crown preparation when parallel walls and flat floors are needed for the restoration?

Accepted Answer

A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder 
A) Flame 
B) Wheel 
C) Flat-end taper 
D) Flat-end cylinder

Question 20

When the dentist requests a No. 701 bur for a cavity preparation, what type of bur would you place in the handpiece?

Accepted Answer

A) Round bur 
B) Inverted cone 
C) Straight fissure-crosscut 
D) Tapered fissure-plain cut 
E) Tapered fissure-crosscut 
A) Round bur 
B) Inverted cone 
C) Straight fissure-crosscut 
D) Tapered fissure-plain cut 
E) Tapered fissure-crosscut

Exam 6: Burs and Rotary Attachments for Handpieces

Which of the following would you select if the dentist requested a No. 330 bur?

Identify the number of the bur that has tapered sides with horizontal cutting edges.

Which type of diamond bur is used to reduce a tooth for a crown preparation when a square shoulder is needed?

Which of the following are parts of a bur?

Which bur forms angles and retention grooves in the walls of a cavity preparation?

Darker grit on a composite disc indicates the disc is _______.

A bur with a latch at the end of the shank fits into which type of handpiece?

Which type of bur is a No. 57?

The rotation instrument designed to contour a composite restoration is a

What does the notation "L" following a bur number indicate?

A friction grip bur fits into which type of handpiece?

Which of the following burs has parallel sides without horizontal cutting edges?

Which of the following is a tapered fissure-plain cut bur?

Which of the following is used to polish restorations, amalgam, composite, and gold?

What type of bur is a No. 556?

Which type of diamond bur is used for a crown preparation when subgingival margins are needed?

Which type of diamond bur is used to reduce a tooth for a crown preparation on the lingual aspect of anterior teeth and for bulk reduction of incisal edges?

Which of the following is not a function of a finishing bur?

Which type of diamond bur is used to reduce a tooth for a crown preparation when parallel walls and flat floors are needed for the restoration?

When the dentist requests a No. 701 bur for a cavity preparation, what type of bur would you place in the handpiece?

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