EFDA Practice Questions with best answers
2024-2025
In the Federation Dentaire International System for numbering, the first number
represents a _________, while the second number represents a _________. -Correct
Answer-quadrant, tooth
What is the visible portion of the anatomical crown known as? -Correct Answer-the
clinical crown
The area where the roots divide -Correct Answer-furcation
The point or area where approximating teeth in the same arch touch or meet each other
is referred to as the ________. -Correct Answer-contact area
Where are the TWO purposes of contact areas? -Correct Answer--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 -Correct Answer-the furrow
What is the HARDEST tissue in the body? -Correct Answer-enamel
What cells form enamel? -Correct Answer-ameloblasts
The bulk of the tooth is made up of -Correct Answer-dentin
,In permanent teeth, the process of enamel formation is completed about ___ years
before eruption. -Correct Answer-3
What is the composition of enamel? -Correct Answer-95% inorganic matter, 5% organic
matter and water
What is the SECOND hardest material in the body? -Correct Answer-dentin
What is the composition of dentin? -Correct Answer-70% inorganic, 20% organic, 10%
water
The three major types of dentin -Correct Answer-primary, secondary, reparative
What type of dentin is a DEFENSE reaction to an area of injury? -Correct Answer-
reparative dentin
What has the HIGHEST fluoride content of all the materialized tissue? -Correct Answer-
cementum
The two types of cementum -Correct Answer-acellular and cellular
What type of cementum ACTIVELY produces new layers of cementum throughout the
life of the tooth? -Correct Answer-cellular
What teeth have the cusp of Carabelli? -Correct Answer-maxillary first molars
The ridge formed by the union of two triangular ridges -Correct Answer-transverse ridge
, The spillway provides an escape for food from the _______ surface during the
mastication (chewing) process. -Correct Answer-occlusal
The uncut tooth structure adjacent to the cavity prep -Correct Answer-cavosurface
line angle -Correct Answer-two walls
point angle -Correct Answer-three walls
A thin soft tissue that is loosely attached to the underlying bone -Correct Answer-
alveolar mucosa
T or F
Undue stress continually placed on the body can contribute to lower back pain,
circulatory problems, muscle aches, and tension -Correct Answer-True
When seated, the thighs should be _______ to the floor -Correct Answer-parallel
The chair is raised or lowered to achieve ____ to ____ inches distance between the
patient's face and the operator's face -Correct Answer-12 to 14
The back of the patient chair is raised until its angle to the floor is ______ degrees -
Correct Answer-25-45
The three basic parts of an instrument are -Correct Answer-the working end, shank, and
handle
2024-2025
In the Federation Dentaire International System for numbering, the first number
represents a _________, while the second number represents a _________. -Correct
Answer-quadrant, tooth
What is the visible portion of the anatomical crown known as? -Correct Answer-the
clinical crown
The area where the roots divide -Correct Answer-furcation
The point or area where approximating teeth in the same arch touch or meet each other
is referred to as the ________. -Correct Answer-contact area
Where are the TWO purposes of contact areas? -Correct Answer--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 -Correct Answer-the furrow
What is the HARDEST tissue in the body? -Correct Answer-enamel
What cells form enamel? -Correct Answer-ameloblasts
The bulk of the tooth is made up of -Correct Answer-dentin
,In permanent teeth, the process of enamel formation is completed about ___ years
before eruption. -Correct Answer-3
What is the composition of enamel? -Correct Answer-95% inorganic matter, 5% organic
matter and water
What is the SECOND hardest material in the body? -Correct Answer-dentin
What is the composition of dentin? -Correct Answer-70% inorganic, 20% organic, 10%
water
The three major types of dentin -Correct Answer-primary, secondary, reparative
What type of dentin is a DEFENSE reaction to an area of injury? -Correct Answer-
reparative dentin
What has the HIGHEST fluoride content of all the materialized tissue? -Correct Answer-
cementum
The two types of cementum -Correct Answer-acellular and cellular
What type of cementum ACTIVELY produces new layers of cementum throughout the
life of the tooth? -Correct Answer-cellular
What teeth have the cusp of Carabelli? -Correct Answer-maxillary first molars
The ridge formed by the union of two triangular ridges -Correct Answer-transverse ridge
, The spillway provides an escape for food from the _______ surface during the
mastication (chewing) process. -Correct Answer-occlusal
The uncut tooth structure adjacent to the cavity prep -Correct Answer-cavosurface
line angle -Correct Answer-two walls
point angle -Correct Answer-three walls
A thin soft tissue that is loosely attached to the underlying bone -Correct Answer-
alveolar mucosa
T or F
Undue stress continually placed on the body can contribute to lower back pain,
circulatory problems, muscle aches, and tension -Correct Answer-True
When seated, the thighs should be _______ to the floor -Correct Answer-parallel
The chair is raised or lowered to achieve ____ to ____ inches distance between the
patient's face and the operator's face -Correct Answer-12 to 14
The back of the patient chair is raised until its angle to the floor is ______ degrees -
Correct Answer-25-45
The three basic parts of an instrument are -Correct Answer-the working end, shank, and
handle
