UNIT 1: Ergonomics & The Dental Office

Question 1

The area in which the dental treatment occurs is the ____________.

Answer 1

operatory

Question 2

Which form of delivery provides the dentist with the easiest access to the dental handpieces without twisting his or her body?

Answer 2

Front

Question 3

Ergonomics is the study and analysis of how humans work in their work environments.

Answer 3

True

Question 4

The most powerful system to remove excess water from the patient’s mouth is by:

Answer 4

using the high-volume evacuator (HVE).

Question 5

Many offices are moving toward using hands-free communication systems to improve communication among staff and improve office efficiencies.

Answer 5

True

Question 6

In determining the zones of activity, which position is considered the center of the clock?

Answer 6

The patient’s head

Question 7

The basic instruments for any procedure include the ____________.

Answer 7

• mirror
• explorer
• cotton pliers

Question 8

Body mechanics for the chairside dental assistant include:

Answer 8

sitting with a straight back, supported by a backrest, and placing thighs parallel to the floor.

Question 9

Once the patient is seated and reclined, the assistant will position the light on the patient’s chest approximately 25-30 inches below the patients chin before adjusting it into position.

Answer 9

True

Question 10

Which stool has a footrest?

Answer 10

the dental assistant’s

Question 11

When the dental chair is in the supine position, the:

Answer 11

patient is positioned as if lying down

Question 12

An instrument used to harden or “cure” light-sensitive dental materials is a(n):

Answer 12

curing light

Question 13

The saliva ejector has high volume suction.

Answer 13

false

the HVE does

Question 14

A central vacuum compressor provides the suction needed for the:

Answer 14

HVE and saliva ejector.

Question 15

Before the patient is dismissed, the patient chair is placed in the _________ position.

Answer 15

upright

Question 16

A central air compressor is used to supply compressed air to the:

Answer 16

air-driven handpieces and air-water syringes.

Question 17

Repetitive motion, overflexion, and overextension of the wrist can significantly increase the risk for:

Answer 17

cumulative trauma disorders (CTDs).

Question 18

The bulb of the operating light must be changed:

Answer 18

after the bulb has cooled.

Question 19

The headrest on a dental chair supports what area of the skull and neck?

Answer 19

Occipital and cervical

Question 20

Why is it important to not touch a new halogen light bulb with bare fingers when an old treatment room light is being replaced?

Answer 20

The oil from the fingers will cause the bulb to overheat and break.

Question 21

For treatment of the maxillary arch, the dental light is ____________.

Answer 21

lowered and the beam directed upward

Question 22

How often should the tip of the air-water syringe be replaced?

Answer 22

Between each patient

Question 23

Gloves that specifically fit right and left hands support the thumb, index finger, and middle finger in a natural manner are considered to be a proper fit.

Answer 23

True

Question 24

A color-coded light or intercom system is an effective way for the dental team to communicate.

Answer 24

true

Question 25

The amount of dental lab work done in the office depends on the dentist’s preference.

Answer 25

true

Question 26

Some changes may be necessary when seating a child patient such as ____________.

Answer 26

* considering child’s size * considering child’s maturity * Considering child’s age

Question 27

Which of the following is considered the best type of lighting to reduce energy usage and use a “truer” white light?

Answer 27

Light-emitting-diode (LED) lighting

Question 28

For treatment of the mandibular arch, the dental light is ____________.

Answer 28

raised and the beam directed downward

Question 29

The safest and most comfortable time to schedule appointments for a pregnant patient is ____________.

Answer 29

second trimester

Question 30

An injury resulting from extreme stretching of muscles or ligaments is a:

Answer 30

strain.

Question 31

The air-water syringe is designed to provide ____________.

Answer 31

* air * water * combination of air and water

Question 32

If an additional pair of hands is used during a procedure, it is termed _________ dentistry.

Answer 32

six-handed

Question 33

Model trimming, model pouring, and making bleaching trays are all procedures that take place in the:

Answer 33

labortory

Question 34

The foot-controlled device that controls the speed of a dental handpiece is called a(n):

Answer 34

rheostat

Question 35

All of the following factors contribute to musculoskeletal disorders (MSDs) except:

Answer 35

* posture. * repetition. * force.

Question 36

A device used to triturate dental materials is called a(n):

Answer 36

amalgamator

Question 37

Ergonomics deals with adaptation of the work environment to the human body.

Answer 37

true

Question 38

Each dental handpiece has four controls.

Answer 38

false

Question 39

The assistant is usually positioned ________ the operator.

Answer 39

4 to 6 inches higher than

Question 40

Before positioning the operating light into the oral cavity, it is first positioned:

Answer 40

on the patient’s chest and then adjusted upward.

Question 41

Placing a patient’s head and knees in approximately the same plane places the patient in a(n):

Answer 41

supine position.

Question 42

The first symptom of carpal tunnel syndrome may be:

Answer 42

painful tingling in the hands at night.

Question 43

During procedures, frequently used items should be:

Answer 43

within a comfortable distance, not above the shoulders.

Question 44

If the high-volume evacuator is not working, it is most likely that which master switch is not turned on?

Answer 44

The central vacuum compressor

Question 45

The number of carpal bones surrounding the carpal tunnel is:

Answer 45

8

Question 46

The properly seated assistant's feet should be ____________.

Answer 46

flat on the foot ring or base

Question 47

An injury resulting from a sudden twist or wrenching of a joint with stretching or tearing ligaments is a:

Answer 47

sprain

Question 48

The placement of the dental unit that keeps the dental instruments and handpieces out of the patient’s sight is a _____ delivery.

Answer 48

rear