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EFDA PRACTICE QUESTIONS AND ANSWERS
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EFDA PRACTICE QUESTIONS AND ANSWERS
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EFDA PRACTICE QUESTIONS AND ANSWERSIn the Federation Dentaire International System for numbering, the first number
represents a _________, while the second number represents a _________. -
Answers- quadrant, tooth
What is the visible portion of the anatomical crown known as? - Answers- the clinical
crown
The area where the roots divide - Answers- furcation
The point or area where approximating teeth in the same arch touch or meet each other
is referred to as the ________. - Answers- contact area
What type of cementum ACTIVELY produces new layers of cementum throughout the
life of the tooth? - Answers- cellular
What teeth have the cusp of Carabelli? - Answers- maxillary first molars
The ridge formed by the union of two triangular ridges - Answers- transverse ridge
The spillway provides an escape for food from the _______ surface during the
mastication (chewing) process. - Answers- occlusal
The uncut tooth structure adjacent to the cavity prep - Answers- cavosurface
line angle - Answers- two walls
point angle - Answers- three walls
A thin soft tissue that is loosely attached to the underlying bone - Answers- alveolar
mucosa
T or F
Undue stress continually placed on the body can contribute to lower back pain,
circulatory problems, muscle aches, and tension - Answers- True
Where are the TWO purposes of contact areas? - Answers- -to keep food from packing
between the teeth
-help stabilize the dental arches
Coronal to the actual division into two or more roots is a concavity that extends to or
nearly to the CEJ. This concavity is called - Answers- the furrow
What is the HARDEST tissue in the body? - Answers- enamel
,What cells form enamel? - Answers- ameloblasts
The bulk of the tooth is made up of - Answers- dentin
In permanent teeth, the process of enamel formation is completed about ___ years
before eruption. - Answers- 3
What is the composition of enamel? - Answers- 95% inorganic matter, 5% organic
matter and water
What is the SECOND hardest material in the body? - Answers- dentin
What is the composition of dentin? - Answers- 70% inorganic, 20% organic, 10% water
The three major types of dentin - Answers- primary, secondary, reparative
What type of dentin is a DEFENSE reaction to an area of injury? - Answers- reparative
dentin
What has the HIGHEST fluoride content of all the materialized tissue? - Answers-
cementum
The two types of cementum - Answers- acellular and cellular
When seated, the thighs should be _______ to the floor - Answers- parallel
The chair is raised or lowered to achieve ____ to ____ inches distance between the
patient's face and the operator's face - Answers- 12 to 14
The back of the patient chair is raised until its angle to the floor is ______ degrees -
Answers- 25-45
The three basic parts of an instrument are - Answers- the working end, shank, and
handle
When seated, the lower legs should be _______ to the floor - Answers- perpendicular
If the operator needs to lean forward, it should be done by bending at the - Answers-
hips or neck
What will increase visibility to the lingual surfaces of the mandibular anterior teeth? -
Answers- having the patient tilt their chin down
The flat, smooth working end of a condenser is referred to as - Answers- the nib
, The FOUR basic principles of instrument use - Answers- grasp, finger rest, adaption,
activation
What grasp offers the GREATEST control of instrumentation during dental procedures
in the oral cavity? - Answers- modified pen grasp
The relationship between the working end of the instrument and the tooth surface -
Answers- adaption
The point of support or rest from which the hand moves to activate the instrument and
obtain the best position or adaption - Answers- finger rest or fulcrum
The movement of the instrument - Answers- activation
Most cavers are designed to _____ material rather than push it - Answers- pull
What are known as the OLDEST method used for retraction and dryness and are
recommended for isolation during SHORT procedures? - Answers- cotton rolls
T or F
Cotton rolls should be adjacent to the parotid and sublingual gland ducts to absorb the
flow of saliva coming from these ducts - Answers- True
T or F
The advantage of a cotton roll holder is that the cheek and tongue are SLIGHTLY
retracted thus giving better visibility - Answers- True
The part of the rubber dam clamp that is expanded to fit over a tooth - Answers- jaw
A general guideline to placing a rubber dam is to isolate at least ____ tooth distal, and
_____ teeth mesial to the tooth being restored. - Answers- one tooth distal, two teeth
mesial
The rubber dam clamp should contact the tooth in at least ____ areas or points -
Answers- four
The bow of the clamp should be positioned _______ and ________ to the clamped
tooth - Answers- distal, occlusal
What is the key to stabilization of the rubber dam? - Answers- clamp
What clamp allows the rubber dam to be attached to it prior to placement? - Answers-
winged
What may be necessary during rubber dam isolation for a Class V cavity prep -
Answers- a gingival retractor
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