Unit 2

Question 1

All of the following are acceptable positioning practices except?

Answer 1

sitting with weight on one hip

Question 2

If the patient’s chair is too low, the clinician’s elbows should be raised up. The bracket table should be positioned as low as possible so that the clinician can easily see the instruments resting on it.

Answer 2

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

Question 3

Magnification loupes can decrease eyestrain and improve visual sharpness. Magnification may increase the tendency to lean forward to get a better view.

Answer 3

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

Question 4

A painful disorder of the wrist and hand caused by compression of the median nerve within the wrist is

Answer 4

Carpal tunnel syndrome

Question 5

A painful musculoskeletal disorder of the fingers, hand, and/or wrists owing to the compression of the brachial nerve plexus and vessels between the neck and shoulder is termed _____.

Answer 5

thoracic outlet syndrome

Question 6

A review of the literature reveals the prevalence of MSDs among dental professionals may be as high as:

Answer 6

93%

Question 7

For periodontal instrumentation of anterior teeth:

Answer 7

Divide each tooth in half and begin instrumentation at the midline

Question 8

In the 12:00 clinician position, your legs should straddle the headrest. At 8:00 clinician position, your line of vision is straight down into the patient’s mouth.

Answer 8

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

Question 9

Right handed clinician: Working on the maxillary anterior sextant surfaces toward, you should be seated at the 9:00 position. Left-handed clinician: Working on the maxillary posterior sextant surfaces toward, you should be seated at the 3:00 position.

Answer 9

Both statements are true

Question 10

The clinician is seated to the front of the patient with his or her hip in line with the patient’s upper arm. Which clock position is this?

Answer 10

8:00 if the clinician is right-handed; 4:00 if left-handed

Question 11

Gloves should fit snugly across the palm of the hand. Gloves should be tight at the wrist to prevent bacteria from contaminating the inside.

Answer 11

Both statements are false

Question 12

Proprioception refers to:

Answer 12

An ability to sense body movement and position through space

Question 13

Research shows that long fingernails

Answer 13

May reduce hand strength during instrumentation

Question 14

The handle is the part of a periodontal instrument that _____.

Answer 14

is used for holding the instrument

Question 15

The instrument shank is the part of a periodontal instrument that _____.

Answer 15

allows the working end to be positioned on the tooth root

Question 16

The modified pen grasp allows for all of the following except _____.

Answer 16

allows flexibility where fingers are placed

Question 17

What is the function of the middle finger in the modified pen grasp?

Answer 17

To guide the working end and feel vibrations

Question 18

A clinician who routinely uses a mirror for indirect vision:

Answer 18

May have less headaches

Question 19

Correct use of the mouth mirror includes all of the following except:

Answer 19

Place the mirror head between the dental arches with the reflecting surface perpendicular to the occlusal surfaces

Question 20

A clinician who routinely uses a mirror for indirect vision:

Answer 20

May have less headaches

Question 21

All of the following are true of the ring finger of your dominant hand in an intraoral finger rest except it _____.

Answer 21

is kept in one exact spot while working on all teeth in a sextant

Question 22

An extraoral fulcrum is a stabilization point outside of the patient’s mouth. An intraoral fulcrum must always be used for the dental mirror for anterior sextants.

Answer 22

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

Question 23

All of the following are true of the finger rest with your dominant hand except _____.

Answer 23

the patient’s cheek provides a stable location for a finger rest

Question 24

The main purpose of maintaining neutral wrist position during instrumentation is _____.

Answer 24

decreased risk of musculoskeletal injury

Question 25

Put the following steps for establishing a finger rest in the correct sequence.
1) Grasp the mirror and establish a finger rest
2) Establish patient chair and head position
3) Establish a finger rest near the first tooth to be treated
4) Assume the clock position for the treatment area
5) Adjust the unit light and other equipment
6) Grasp the instrument in dominant hand

Answer 25

4, 2, 5, 1, 6, 3