Deck 35: Dental Handpieces and Accessories

Question 1

The parts of a rotary instrument are the:

A)shank, neck, and head.
B)handle, shank, and nib.
C)stem and cutting tips.
D)latch and grip.

Answer 1

shank, neck, and head.

Question 2

The prophylaxis angle attaches to the _____ handpiece and is used to polish the teeth.

A)laser
B)laboratory
C)high-speed
D)low-speed

Answer 2

low-speed

Question 3

The _____ handpiece supplies a water coolant,because it can generate enough frictional heat on a tooth to cause possible damage to the pulp.

A)air-abrasion
B)high-speed
C)low-speed
D)ultrasonic

Answer 3

high-speed

Question 4

When cleaning a dental handpiece,it is important to:

A)always lubricate the handpiece before sterilization.
B)always lubricate the handpiece after sterilization.
C)carefully follow the manufacturer's instructions.
D)never use a lubricant on the handpiece.

Question 5

A dental handpiece is identified as a _____ instrument that _____ be sterilized before reuse.

A)critical; must
B)semicritical; must
C)semicritical; may or may not
D)noncritical; may not be

Question 6

The term _____ is applied to all rotary instruments that have a sharp cutting head.

A)wheel
B)diamond
C)bur
D)finishing stone

Question 7

A _____-shaped diamond rotary instrument is used to cut through fixed prostheses.

A)cylinder
B)flame
C)wheel
D)disc

Question 8

The _____ handpiece operates from air pressure and reaches speeds up to 450,000 rpm.

A)high-speed
B)laser
C)ultrasonic
D)laboratory

Question 9

The handpiece that has the greatest torque (twisting or turning force) is the _____ handpiece.

A)laboratory
B)air abrasion
C)ultrasonic
D)high-speed

Question 10

The low-speed handpiece operates from _____ rotations per minute (rpm).

A)100 to 500
B)1000 to 5000
C)10,000 to 30,000
D)10,000 to 100,000

Question 11

Since the late 1940s,_____ burs have been used for cavity preparation.

A)steel
B)tungsten carbide
C)molybdenum
D)palladium

Question 12

The high-speed handpiece uses _____ burs.

A)friction-grip
B)straight
C)latch
D)laboratory

Question 13

Advantages of a laser handpiece over a high-speed handpiece include:

A)faster preparation time.
B)immediate vaporization of previous amalgam restorations.
C)use of an air turbine.
D)treatment that is usually painless, so anesthesia is unnecessary.

Question 14

Which type of bur is used to remove decay during tooth preparation?

A)Round
B)Straight fissure plain cut
C)Straight fissure cross-cut
D)Tapered fissure plain cut

Question 15

The first dental handpiece was introduced in the:

A)1920s.
B)1930s.
C)1940s.
D)1950s.

Question 16

The air abrasion technique uses high-pressure delivery of _____ particles through a small probe to remove tooth structure.

A)zirconium silicate
B)aluminum oxide
C)silicon carbide
D)tin oxide

Question 17

The most frequently used device in restorative dentistry is the:

A)amalgamator.
B)dental handpiece.
C)prophy angle.
D)x-ray machine.

Question 18

The _____ handpiece can operate both forward and backward and can be used with a variety of attachments.

A)high-speed
B)laboratory
C)low-speed
D)laser

Question 19

Which of the following statements is true regarding the different types of shanks?

A)The long, straight shank is used in the straight-line attachment, which fits on the high-speed handpiece.
B)The long, straight shank is used in the angle attachment, which fits on the low-speed handpiece.
C)The latch-type shank has a small groove at the end that mechanically locks into the contra-angle attachment, which fits on the high-speed handpiece.
D)The friction-grip shank is short and smooth and has no retention grooves in the end. The shank is held in the high-speed handpiece by the creation of friction that grips the entire shank.

Question 20

The ultrasonic handpiece is used for:

A)cavity preparation.
B)polishing.
C)scaling.
D)adjusting dentures.

Question 21

What handpiece uses mechanical radiant energy of water and sound vibrations to create a pulsating effect on a tooth surface to remove calculus and stains?

A)High-speed
B)Laser
C)Low-speed
D)Ultrasonic

Question 22

Rotary instruments were introduced in dentistry in the ______ to complement the use of hand instruments in the cutting,grinding,and polishing procedures.

A)1920s
B)1950s
C)1970s
D)1940s

Question 23

Which handpiece would be used for porcelain adjustments?

A)High-speed
B)Ultrasonic
C)Low-speed
D)Laser

Question 24

Which type of rotary instrument shank is placed into a high-speed handpiece?

A)Straight
B)Friction-grip
C)Latch-type
D)Curved

Question 25

Which of the following is not a use for a low-speed handpiece?

A)Removal of old or faulty restorations
B)Finishing and polishing restorations
C)Root canal treatment
D)Coronal polishing and removal of stains

Question 26

Which type of bur helps to provide angles to the walls of the cavity preparation with retention grooves?

A)699
B)4
C)56
D)330

Question 27

Laboratory burs have a _____ shank and a _____ head than dental burs.

A)shorter; smaller
B)longer; smaller
C)shorter; larger
D)longer; larger

Question 28

Rotary instruments have three basic parts.They are the:

A)handle, shank, and working end.
B)shank, neck, and head.
C)neck, head, and handle.
D)shank, neck, and working end.

Question 29

What design of bur is a 557 and what is its use?

A)Round bur: gains entrance into tooth structure
B)Straight fissure cross-cut: forms internal walls of the preparation
C)Inverted cone: forms retention grooves
D)Pear: extends cavity preparation

Question 30

Which of the following is not correct about diamond rotary instruments?

A)They have a metal base with flecks of industrial diamonds.
B)They are inexpensive.
C)They increase cutting ability.
D)They shorten preparation time and increase productivity.

Question 31

The two most common types of dental handpieces are _____ handpieces.

A)high-speed and laser
B)ultrasonic and laser
C)low-speed and high-speed
D)high-speed and ultrasonic

Question 32

A high-speed handpiece can reach how many rpm (rotations per minute)?

A)250,000 rpm
B)100,000 rpm
C)450,000 rpm
D)300,000 rpm

Question 33

What type of shank fits into a contra-angle attachment for a low-speed handpiece?

A)Friction-grip
B)Straight
C)Latch-type
D)Round-type

Question 34

The most commonly shaped finishing burs used are _____-shaped.

A)flame
B)round
C)tapered
D)all of the above

Question 35

A laser handpiece uses a beam of light to do which of the following procedure(s)?

A)Remove old restorations
B)Cauterize soft tissue
C)Vaporize decayed tooth structure
D)Both b and c

Question 36

A 170 bur is used to:

A)provide angles to the walls of a cavity preparation.
B)create a shoulder for the margin of a crown preparation.
C)remove decay.
D)form internal walls of a cavity preparation.

Question 37

What is the name of a metal shaft on which sandpaper disks or other abrasives are mounted?

A)Shaft
B)Working end
C)Screw
D)Mandrel

Question 38

Which is the most varied category of rotary instruments?

A)Diamond rotary instruments
B)Laboratory burs
C)Carbide burs
D)Abrasive rotary instruments

Question 39

A finishing bur has _____ on the working end than a restorative bur because it is used for final stage polishing of a restoration.

A)fewer blades
B)more blades
C)the same number of blades

Question 40

Because abrasive discs and wheels are supplied separately and not attached to a shank,a _____ is used to attach these abrasives to the dental handpiece.

A)console
B)mandrel
C)shank
D)torque

Question 41

What is the most commonly used bur in the laboratory?

A)Carborundum
B)Sandpaper disks
C)Acrylic bur
D)Cuttlebone

Question 42

Restorative burs are made from what material?

A)Gold
B)Tungsten carbide
C)Titanium
D)Stainless steel

Question 43

What type of restoration material would require finishing burs,as well as sandpaper disks and cuttlebone point?

A)Gold
B)Stainless steel
C)Amalgam
D)Esthetic materials

Question 44

Air abrasion handpieces are most effective when used for which of the following?

A)External stain removal
B)Sealants
C)Crown preparations
D)Both a and b