Chapter 35 Dental handpieces and accessories practice quiz

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

1940s

The metal shaft on which sandpaper disks and other abrasives are mounted is called a

mandrel

The handpiece that can be used with a variety of attachments is the _____ motor

low speed

The most commonly used bur in the dental laboratory is

acrylic bur

Which type of rotary instrument Shank is placed into a straight line attachment?

long and straight

Why is it important to clean debris from the external surface of the handpiece prior to sterilization?

Mercury from removal of amalgam restorations can be vaporized by the autoclave.

A ______ shaped diamond rotary instrument is used to provide access to the pulp chamber

round

A laser handpiece uses a beam of light to

remove decayed tooth structure

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

treatment that is usually painless, so anesthesia is unnecessary.

The low-speed handpiece motor operates at _____ rotations per minute

5,000-30,000

The term applied to all rotary instruments that have a sharp cutting head with blades is

BUR

Air abrasion handpieces are most effective when used for

external stain removal

a finishing bur has ____ blades on the working end then a restorative bur because it is used for final stage polishing of a restoration

more

A #170 bur is used to

Provide angles to the walls of a cavity preparation

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

laboratory

since the late 1940s, ______ burs have been used for cavity preparation

tungsten carbide

An adjustment of porcelain restoration is made with a

Low speed motor

which type of bur is used to remove carries during tooth preparation

Round

All of the following are correct about Dimond rotary instruments, except they

Are inexpensive

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

High-speed

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

low-speed motor

The greater the number of cutting surfaces on the head of a bur the

greater the polishing or finishing capability.

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

aluminum oxide

All of the following our uses for a low speed motor, except

Removal of old or faulty restorations

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

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.

When cleaning a dental handpiece, it is important to

carefully follow the manufacturer's instructions

The air driven turbine Dental piece was introduced in the

1940s

The high-speed handpiece uses _____ burs.

friction grip

the #7104, #7106, and #7108 burs are examples of which shape of finishing bur

flame

A #557 bur is a(n) ___________ and is used for ______________________.

straight fissure cross-cut; forming internal walls of the preparation

the ____ handpiece operates from air pressure and reaches up to 400,000 RPM

High speed

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

6.99

The ultrasonic handpiece is used for

scaling

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

critical; must

The most varied category of rotary instruments is

Abrasive rotary instruments

The parts of a rotary instrument are the

shank, neck, head

Laboratory burs have a _____ Shank and a ____ head than dental burs

longer; larger

The type of shank that fits into a contra angle attachment for a low-speed handpiece is a

latch type

Which type of handpiece is used for removal of an impacted mandibular third molar

Surgical handpiece

It is recommended to wipe the light port on the fiber optic handpiece with an alcohol swab to remove excess lubricant because the

light will be dimmed if any lubricant remains

The handpiece that uses mechanical, radiant water, energy, and sound vibrations to create a pulsating effect on a two surface for the removal of calculus and stains is the _____ handpiece

Ultrasonic

The two most common types of high-speed Dental handpieces are ______ handpieces

Air driven and electric

which of the following methods is recommended for sterilizing the high-speed handpiece

autoclaving

The most frequently used instrument in restorative dentistry is the

Amalgamator