EFDA Practice Exam 239 Questions and Answer a= a= a= a= a= a=
s 2025 a=
In the Federation Dentaire International System for numbering, the first number represents a _______
a= a= a= a= a= a= a= a= a= a= a= a= a=
__, while the second number represents a _________. -
a= a= a= a= a= a= a= a= a=
a= ✅ quadrant, tooth
a=a= a=
What is the visible portion of the anatomical crown known as? -
a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ the clinical crown
a=a= a= a=
The area where the roots divide -
a= a= a= a= a= a= a=
a= ✅ furcation a=a=
The point or area where approximating teeth in the same arch touch or meet each other is referred to
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
as the ________. -
a= a= a= a=
a= ✅ contact area
a=a= a=
Where are the TWO purposes of contact areas? -
a= a= a= a= a= a= a= a= a=
a= ✅ -to keep food from packing between the teeth
a=a= a= a= a= a= a= a= a=
-help stabilize the dental arches
a= a= a= a=
Coronal to the actual division into two or more roots is a concavity that extends to or nearly to the CEJ.
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
This concavity is called -
a= a= a= a= a=
a= ✅ the furrowa=a= a=
What is the HARDEST tissue in the body? -
a= a= a= a= a= a= a= a= a=
a= ✅ enamel a=a=
What cells form enamel? -a= a= a= a= a=
a= ✅ ameloblasts
a=a=
The bulk of the tooth is made up of -
a= a= a= a= a= a= a= a= a= a=
,a= ✅ dentin a=a=
In permanent teeth, the process of enamel formation is completed about ___ years before eruption. -
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅3 a=a=
What is the composition of enamel? -
a= a= a= a= a= a= a=
a= ✅ 95% inorganic matter, 5% organic matter and water
a=a= a= a= a= a= a= a= a=
What is the SECOND hardest material in the body? -
a= a= a= a= a= a= a= a= a= a=
a= ✅ dentin a=a=
What is the composition of dentin? -
a= a= a= a= a= a= a=
a= ✅ 70% inorganic, 20% organic, 10% water
a=a= a= a= a= a= a=
The three major types of dentin -
a= a= a= a= a= a= a=
a= ✅ primary, secondary, reparative
a=a= a= a=
What type of dentin is a DEFENSE reaction to an area of injury? -
a= a= a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ reparative dentin
a=a= a=
What has the HIGHEST fluoride content of all the materialized tissue? -
a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ cementum a=a=
The two types of cementum -
a= a= a= a= a= a=
a= ✅ acellular and cellular
a=a= a= a=
What type of cementum ACTIVELY produces new layers of cementum throughout the life of the tooth
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
?- a= a=
a= ✅ cellular a=a=
What teeth have the cusp of Carabelli? -
a= a= a= a= a= a= a= a=
, a= ✅ maxillary first molars
a=a= a= a=
The ridge formed by the union of two triangular ridges -
a= a= a= a= a= a= a= a= a= a= a=
a= ✅ transverse ridge
a=a= a=
The spillway provides an escape for food from the _______ surface during the mastication (chewing) p
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
rocess. - a= a=
a= ✅ occlusal a=a=
The uncut tooth structure adjacent to the cavity prep -
a= a= a= a= a= a= a= a= a= a=
a= ✅ cavosurface
a=a=
line angle - a= a= a=
a= ✅ two wallsa=a= a=
point angle - a= a= a=
a= ✅ three walls
a=a= a=
A thin soft tissue that is loosely attached to the underlying bone -
a= a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ alveolar mucosa
a=a= a=
T or F
a= a=
Undue stress continually placed on the body can contribute to lower back pain, circulatory problems,
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
muscle aches, and tension - a= a= a= a= a=
a= ✅ True a=a=
When seated, the thighs should be _______ to the floor -
a= a= a= a= a= a= a= a= a= a= a=
a= ✅ parallel a=a=
The chair is raised or lowered to achieve ____ to ____ inches distance between the patient's face and t
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
he operator's face -
a= a= a= a=
a= ✅ 12 to 14 a=a= a= a=
s 2025 a=
In the Federation Dentaire International System for numbering, the first number represents a _______
a= a= a= a= a= a= a= a= a= a= a= a= a=
__, while the second number represents a _________. -
a= a= a= a= a= a= a= a= a=
a= ✅ quadrant, tooth
a=a= a=
What is the visible portion of the anatomical crown known as? -
a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ the clinical crown
a=a= a= a=
The area where the roots divide -
a= a= a= a= a= a= a=
a= ✅ furcation a=a=
The point or area where approximating teeth in the same arch touch or meet each other is referred to
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
as the ________. -
a= a= a= a=
a= ✅ contact area
a=a= a=
Where are the TWO purposes of contact areas? -
a= a= a= a= a= a= a= a= a=
a= ✅ -to keep food from packing between the teeth
a=a= a= a= a= a= a= a= a=
-help stabilize the dental arches
a= a= a= a=
Coronal to the actual division into two or more roots is a concavity that extends to or nearly to the CEJ.
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
This concavity is called -
a= a= a= a= a=
a= ✅ the furrowa=a= a=
What is the HARDEST tissue in the body? -
a= a= a= a= a= a= a= a= a=
a= ✅ enamel a=a=
What cells form enamel? -a= a= a= a= a=
a= ✅ ameloblasts
a=a=
The bulk of the tooth is made up of -
a= a= a= a= a= a= a= a= a= a=
,a= ✅ dentin a=a=
In permanent teeth, the process of enamel formation is completed about ___ years before eruption. -
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅3 a=a=
What is the composition of enamel? -
a= a= a= a= a= a= a=
a= ✅ 95% inorganic matter, 5% organic matter and water
a=a= a= a= a= a= a= a= a=
What is the SECOND hardest material in the body? -
a= a= a= a= a= a= a= a= a= a=
a= ✅ dentin a=a=
What is the composition of dentin? -
a= a= a= a= a= a= a=
a= ✅ 70% inorganic, 20% organic, 10% water
a=a= a= a= a= a= a=
The three major types of dentin -
a= a= a= a= a= a= a=
a= ✅ primary, secondary, reparative
a=a= a= a=
What type of dentin is a DEFENSE reaction to an area of injury? -
a= a= a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ reparative dentin
a=a= a=
What has the HIGHEST fluoride content of all the materialized tissue? -
a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ cementum a=a=
The two types of cementum -
a= a= a= a= a= a=
a= ✅ acellular and cellular
a=a= a= a=
What type of cementum ACTIVELY produces new layers of cementum throughout the life of the tooth
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
?- a= a=
a= ✅ cellular a=a=
What teeth have the cusp of Carabelli? -
a= a= a= a= a= a= a= a=
, a= ✅ maxillary first molars
a=a= a= a=
The ridge formed by the union of two triangular ridges -
a= a= a= a= a= a= a= a= a= a= a=
a= ✅ transverse ridge
a=a= a=
The spillway provides an escape for food from the _______ surface during the mastication (chewing) p
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
rocess. - a= a=
a= ✅ occlusal a=a=
The uncut tooth structure adjacent to the cavity prep -
a= a= a= a= a= a= a= a= a= a=
a= ✅ cavosurface
a=a=
line angle - a= a= a=
a= ✅ two wallsa=a= a=
point angle - a= a= a=
a= ✅ three walls
a=a= a=
A thin soft tissue that is loosely attached to the underlying bone -
a= a= a= a= a= a= a= a= a= a= a= a= a=
a= ✅ alveolar mucosa
a=a= a=
T or F
a= a=
Undue stress continually placed on the body can contribute to lower back pain, circulatory problems,
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
muscle aches, and tension - a= a= a= a= a=
a= ✅ True a=a=
When seated, the thighs should be _______ to the floor -
a= a= a= a= a= a= a= a= a= a= a=
a= ✅ parallel a=a=
The chair is raised or lowered to achieve ____ to ____ inches distance between the patient's face and t
a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a= a=
he operator's face -
a= a= a= a=
a= ✅ 12 to 14 a=a= a= a=
