Chapter 01: Basic Dental Instruments
Boyd: Dental Instruments, 6th Edition
MULTIPLE CHOICE
1. What is the purpose of the mouth mirror?
a. Provide indirect vision.
b. Reflect light into the mouth.
c. Retract the lips, cheeks, and tongue.
d. A and C
e. All of the above
ANS: E
The purpose of the mouth mirror is to provide indirect vision, light reflection, and retraction.
REF: Page 3 TOP: CDA, GC, II. Chairside Dental Procedures
2. What is the purpose of the explorer?
a. Retract the lips, cheeks, and tongue.
b. Transfer material from the oral cavity.
c. Examine teeth for decay, calculus, or other abnormalities.
d. All of the above
ANS: C
The thin, sharp, flexible tip is ideal to check the teeth for dental caries and to detect calculus
and furcations but would prove injurious to the patient if used for retraction.
The tip of the working end is too small to be used as a transfer instrument.
REF: Page 5 TOP: CDA, GC, II. Chairside Dental Procedures
3. The main function of this instrument is to grasp and/or transfer material into and out of the
oral cavity.
a. Curette
b. Mouth mirror
c. Periodontal probe
d. Cotton forceps (pliers)
ANS: D
The main function of cotton forceps is to grasp and transfer. The probe, mouth mirror, and
curette do not have features for grasping.
REF: Page 7 TOP: CDA, GC, II. Chairside Dental Procedures
4. Which of the following instruments is part of a basic setup for most dental procedures?
a. Curette
b. Spoon excavator
c. Periodontal probe
d. Cotton forceps (pliers)
ANS: D
, The cotton forceps is a useful instrument for most all procedures. The curette and periodontal
probe are instruments used in a prophylaxis or periodontal examination. A spoon excavator is
used to remove dental caries and is part of a restorative procedure.
REF: Page 11 TOP: CDA, GC, II. Chairside Dental Procedures
5. Which type of mouth mirror reflects magnifies the image?
a. Double-sided mirror
b. Front surface mirror
c. Concave mirror
d. All of the above
ANS: B
The front surface mirror produces the most accurate image. A double-sided mirror may have a
front surface feature, or it may not. A concave mirror magnifies the image and does not
provide an accurate representation.
REF: Page 3 TOP: CDA, GC, II. Chairside Dental Procedures
6. Why is using a variety of instrument handle diameters beneficial to the dental professional?
a. Helps in lightening the instrument grasp.
b. Maximizes control of the instrument.
c. Lessens the stress associated with carpal tunnel syndrome.
d. Minimizes fatigue when using the instrument.
ANS: C
It has been proven that changing the energy needed to grasp an instrument, which causes
muscle fatigue and stress, can lessen the stress associated with carpal tunnel syndrome.
REF: Page 9 TOP: CDA, GC, II. Chairside Dental Procedures
7. Which type of mouth mirror is used in disposable mirrors?
a. Double-sided mirror
b. Front surface mirror
c. Flat surface mirror
d. Concave mirror
ANS: C
The flat surface mirror is used in disposable mirrors.
REF: Page 3 TOP: CDA, GC, II. Chairside Dental Procedures
8. Which statement is correct about cotton forceps?
a. Comes in one size
b. Has plain or serrated tips
c. Has pointed or rounded tips
d. B and C only
e. All of the above
ANS: D
, Characteristics of cotton forceps include, plain or serrated tips, pointed or rounded tips and
thin or thick tips. They can be locking or non-locking and there are a range of sizes to choose
from.
REF: Page 7 TOP: CDA, GC, II. Chairside Dental Procedures
9. Which instrument would NOT be found on a basic tray set-up?
a. Mouth mirror
b. Sickle scaler
c. Explorer
d. All of the above are found on the basic tray.
ANS: B
A sickle scaler would not be found on a basic tray set-up. A basic tray would include a mouth
mirror, explorer and cotton forceps.
REF: Page 11 TOP: CDA, GC, II. Chairside Dental Procedures
, Chapter 02: Enamel Cutting Instruments
Boyd: Dental Instruments, 6th Edition
MULTIPLE CHOICE
1. On a three-number enamel cutting instrument, what does the third number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: B
On a three-number cutting instrument, the numbers on the handle indicate width, length, and
angle of the blade. The third number indicates the angle of the blade.
REF: Page 17 TOP: CDA, GC, II. Chairside Dental Procedures
2. On a four-number enamel cutting instrument, what does the third number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: D
On a four-number instrument, the numbers represent the width of the blade, the angle of the
cutting edge, the length of the blade, and the angle of the blade. The third number indicates
the length of the blade in millimeters.
REF: Page 19 TOP: CDA, GC, II. Chairside Dental Procedures
3. On a three-number enamel cutting instrument, what does the first number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: C
On a three-number cutting instrument, the numbers on the handle indicate width, length, and
angle of the blade. The first number indicates the width of the blade in tenths of millimeters.
REF: Page 17 TOP: CDA, GC, II. Chairside Dental Procedures
4. On a three-number enamel cutting instrument, what does the second number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: D
Boyd: Dental Instruments, 6th Edition
MULTIPLE CHOICE
1. What is the purpose of the mouth mirror?
a. Provide indirect vision.
b. Reflect light into the mouth.
c. Retract the lips, cheeks, and tongue.
d. A and C
e. All of the above
ANS: E
The purpose of the mouth mirror is to provide indirect vision, light reflection, and retraction.
REF: Page 3 TOP: CDA, GC, II. Chairside Dental Procedures
2. What is the purpose of the explorer?
a. Retract the lips, cheeks, and tongue.
b. Transfer material from the oral cavity.
c. Examine teeth for decay, calculus, or other abnormalities.
d. All of the above
ANS: C
The thin, sharp, flexible tip is ideal to check the teeth for dental caries and to detect calculus
and furcations but would prove injurious to the patient if used for retraction.
The tip of the working end is too small to be used as a transfer instrument.
REF: Page 5 TOP: CDA, GC, II. Chairside Dental Procedures
3. The main function of this instrument is to grasp and/or transfer material into and out of the
oral cavity.
a. Curette
b. Mouth mirror
c. Periodontal probe
d. Cotton forceps (pliers)
ANS: D
The main function of cotton forceps is to grasp and transfer. The probe, mouth mirror, and
curette do not have features for grasping.
REF: Page 7 TOP: CDA, GC, II. Chairside Dental Procedures
4. Which of the following instruments is part of a basic setup for most dental procedures?
a. Curette
b. Spoon excavator
c. Periodontal probe
d. Cotton forceps (pliers)
ANS: D
, The cotton forceps is a useful instrument for most all procedures. The curette and periodontal
probe are instruments used in a prophylaxis or periodontal examination. A spoon excavator is
used to remove dental caries and is part of a restorative procedure.
REF: Page 11 TOP: CDA, GC, II. Chairside Dental Procedures
5. Which type of mouth mirror reflects magnifies the image?
a. Double-sided mirror
b. Front surface mirror
c. Concave mirror
d. All of the above
ANS: B
The front surface mirror produces the most accurate image. A double-sided mirror may have a
front surface feature, or it may not. A concave mirror magnifies the image and does not
provide an accurate representation.
REF: Page 3 TOP: CDA, GC, II. Chairside Dental Procedures
6. Why is using a variety of instrument handle diameters beneficial to the dental professional?
a. Helps in lightening the instrument grasp.
b. Maximizes control of the instrument.
c. Lessens the stress associated with carpal tunnel syndrome.
d. Minimizes fatigue when using the instrument.
ANS: C
It has been proven that changing the energy needed to grasp an instrument, which causes
muscle fatigue and stress, can lessen the stress associated with carpal tunnel syndrome.
REF: Page 9 TOP: CDA, GC, II. Chairside Dental Procedures
7. Which type of mouth mirror is used in disposable mirrors?
a. Double-sided mirror
b. Front surface mirror
c. Flat surface mirror
d. Concave mirror
ANS: C
The flat surface mirror is used in disposable mirrors.
REF: Page 3 TOP: CDA, GC, II. Chairside Dental Procedures
8. Which statement is correct about cotton forceps?
a. Comes in one size
b. Has plain or serrated tips
c. Has pointed or rounded tips
d. B and C only
e. All of the above
ANS: D
, Characteristics of cotton forceps include, plain or serrated tips, pointed or rounded tips and
thin or thick tips. They can be locking or non-locking and there are a range of sizes to choose
from.
REF: Page 7 TOP: CDA, GC, II. Chairside Dental Procedures
9. Which instrument would NOT be found on a basic tray set-up?
a. Mouth mirror
b. Sickle scaler
c. Explorer
d. All of the above are found on the basic tray.
ANS: B
A sickle scaler would not be found on a basic tray set-up. A basic tray would include a mouth
mirror, explorer and cotton forceps.
REF: Page 11 TOP: CDA, GC, II. Chairside Dental Procedures
, Chapter 02: Enamel Cutting Instruments
Boyd: Dental Instruments, 6th Edition
MULTIPLE CHOICE
1. On a three-number enamel cutting instrument, what does the third number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: B
On a three-number cutting instrument, the numbers on the handle indicate width, length, and
angle of the blade. The third number indicates the angle of the blade.
REF: Page 17 TOP: CDA, GC, II. Chairside Dental Procedures
2. On a four-number enamel cutting instrument, what does the third number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: D
On a four-number instrument, the numbers represent the width of the blade, the angle of the
cutting edge, the length of the blade, and the angle of the blade. The third number indicates
the length of the blade in millimeters.
REF: Page 19 TOP: CDA, GC, II. Chairside Dental Procedures
3. On a three-number enamel cutting instrument, what does the first number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: C
On a three-number cutting instrument, the numbers on the handle indicate width, length, and
angle of the blade. The first number indicates the width of the blade in tenths of millimeters.
REF: Page 17 TOP: CDA, GC, II. Chairside Dental Procedures
4. On a three-number enamel cutting instrument, what does the second number indicate?
a. Angle of the cutting edge of the blade in relation to the handle in millimeters
b. Angle of the blade from the long axis of the shaft in millimeters
c. Width of the blade in tenths of millimeters
d. Length of the blade in millimeters
ANS: D
