EFDA EXAM PRACTICE 230 QUESTIONS & CORRECT
ANSWERS LATEST 2025
In the Federation Dentaire International System for numbering, the first number
represents a _________, while the second number represents a _________. -
ANSWER-quadrant, tooth
What is the visible portion of the anatomical crown known as? - ANSWER-the
clinical crown
The area where the roots divide - ANSWER-furcation
The point or area where approximating teeth in the same arch touch or meet
each other is referred to as the ________. - ANSWER-contact area
Where are the TWO purposes of contact areas? - 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 - ANSWER-the furrow
What is the HARDEST tissue in the body? - ANSWER-enamel
,What cells form enamel? - ANSWER-ameloblasts
The bulk of the tooth is made up of - ANSWER-dentin
In permanent teeth, the process of enamel formation is completed about ___
years before eruption. - ANSWER-3
What is the composition of enamel? - ANSWER-95% inorganic matter, 5% organic
matter and water
What is the SECOND hardest material in the body? - ANSWER-dentin
What is the composition of dentin? - ANSWER-70% inorganic, 20% organic, 10%
water
The three major types of dentin - ANSWER-primary, secondary, reparative
What type of dentin is a DEFENSE reaction to an area of injury? - ANSWER-
reparative dentin
What has the HIGHEST fluoride content of all the materialized tissue? - ANSWER-
cementum
The two types of cementum - ANSWER-acellular and cellular
, What type of cementum ACTIVELY produces new layers of cementum throughout
the life of the tooth? - ANSWER-cellular
What teeth have the cusp of Carabelli? - ANSWER-maxillary first molars
The ridge formed by the union of two triangular ridges - ANSWER-transverse ridge
The spillway provides an escape for food from the _______ surface during the
mastication (chewing) process. - ANSWER-occlusal
The uncut tooth structure adjacent to the cavity prep - ANSWER-cavosurface
line angle - ANSWER-two walls
point angle - ANSWER-three walls
A thin soft tissue that is loosely attached to the underlying bone - 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 - ANSWER-True
When seated, the thighs should be _______ to the floor - ANSWER-parallel
ANSWERS LATEST 2025
In the Federation Dentaire International System for numbering, the first number
represents a _________, while the second number represents a _________. -
ANSWER-quadrant, tooth
What is the visible portion of the anatomical crown known as? - ANSWER-the
clinical crown
The area where the roots divide - ANSWER-furcation
The point or area where approximating teeth in the same arch touch or meet
each other is referred to as the ________. - ANSWER-contact area
Where are the TWO purposes of contact areas? - 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 - ANSWER-the furrow
What is the HARDEST tissue in the body? - ANSWER-enamel
,What cells form enamel? - ANSWER-ameloblasts
The bulk of the tooth is made up of - ANSWER-dentin
In permanent teeth, the process of enamel formation is completed about ___
years before eruption. - ANSWER-3
What is the composition of enamel? - ANSWER-95% inorganic matter, 5% organic
matter and water
What is the SECOND hardest material in the body? - ANSWER-dentin
What is the composition of dentin? - ANSWER-70% inorganic, 20% organic, 10%
water
The three major types of dentin - ANSWER-primary, secondary, reparative
What type of dentin is a DEFENSE reaction to an area of injury? - ANSWER-
reparative dentin
What has the HIGHEST fluoride content of all the materialized tissue? - ANSWER-
cementum
The two types of cementum - ANSWER-acellular and cellular
, What type of cementum ACTIVELY produces new layers of cementum throughout
the life of the tooth? - ANSWER-cellular
What teeth have the cusp of Carabelli? - ANSWER-maxillary first molars
The ridge formed by the union of two triangular ridges - ANSWER-transverse ridge
The spillway provides an escape for food from the _______ surface during the
mastication (chewing) process. - ANSWER-occlusal
The uncut tooth structure adjacent to the cavity prep - ANSWER-cavosurface
line angle - ANSWER-two walls
point angle - ANSWER-three walls
A thin soft tissue that is loosely attached to the underlying bone - 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 - ANSWER-True
When seated, the thighs should be _______ to the floor - ANSWER-parallel
