EFDA Review Exam Questions &
Answers (Grade A+)
What is the anatomical crown? -
correct answer ✅The portion that extends from the incisal or
occlusal surface to the enamel's junction with the cementum of the
root
What is the clinical crown? -
correct answer ✅The visible portion of the anatomical crown
extending from the crest of the soft tissue and includes the occlusal
surface or incisal edge
What is the cementoenamel junction (cervical line)? -
correct answer ✅A slight constriction that encircles the tooth,
dipping apically on the facial and lingual surfaces and rising
coronally on the proximal surfaces
What is the function of the anterior teeth? -
correct answer ✅To tear or incise food
What is the function of the posterior teeth? -
correct answer ✅Shaped with broad biting and convex surfaces
that grind food
,EFDA Review Exam Questions &
Answers (Grade A+)
Where is the furrow? -
correct answer ✅Coronal to the actual division into two or more
roots is a concavity that extends to or nearly to the cementoenamel
junction
Define contact area -
correct answer ✅The point or area where approximating teeth in
the same arch touch or meet each other
What is the functions of the contact area? -
correct answer ✅To keep food from packaging between the teeth
and to help stabilize the dental arches by combining the anchorage
of all teeth in either arch
What is an embrasure? -
correct answer ✅The spaces adjacent to and surrounding the
contact of the teeth in the same arch
Where is enamel the thickest? -
correct answer ✅At the incisal or occlusal areas
,EFDA Review Exam Questions &
Answers (Grade A+)
What is enamel's composition? -
correct answer ✅95% inorganic matter, mainly hydroxyapatite,
and 5% organic matter and water
______ is the hardest tissue in the body -
correct answer ✅Enamel
____ is the second hardest material in the body -
correct answer ✅Dentin
_____ provides support for enamel and increases in hardness as it
ages -
correct answer ✅Dentin
When scratching dentin with an explorer, it exhibits a ____ sound
opposed to the sharp higher pitch of enamel -
correct answer ✅Dull
Dentin is composed of -
correct answer ✅70% inorganic matter, 20% organic matter, and
10% water
, EFDA Review Exam Questions &
Answers (Grade A+)
Primary dentin -
correct answer ✅Is produced before the tooth erupts and shortly
after eruption
Secondary dentin -
correct answer ✅Is a continuation of primary dentin that forms at
a slower rate as the tooth ages and throughout the life of the tooth
Reparative/Tertiary dentin -
correct answer ✅Forms rapidly when the tooth has received an
excessive stimulus from caries, cavity preparation, or other trauma
___ is the hard dental tissue covering the anatomical roots of the
teeth -
correct answer ✅Cementum
What has the highest fluoride content of all the materialized tissue?
-
correct answer ✅Cementum
Answers (Grade A+)
What is the anatomical crown? -
correct answer ✅The portion that extends from the incisal or
occlusal surface to the enamel's junction with the cementum of the
root
What is the clinical crown? -
correct answer ✅The visible portion of the anatomical crown
extending from the crest of the soft tissue and includes the occlusal
surface or incisal edge
What is the cementoenamel junction (cervical line)? -
correct answer ✅A slight constriction that encircles the tooth,
dipping apically on the facial and lingual surfaces and rising
coronally on the proximal surfaces
What is the function of the anterior teeth? -
correct answer ✅To tear or incise food
What is the function of the posterior teeth? -
correct answer ✅Shaped with broad biting and convex surfaces
that grind food
,EFDA Review Exam Questions &
Answers (Grade A+)
Where is the furrow? -
correct answer ✅Coronal to the actual division into two or more
roots is a concavity that extends to or nearly to the cementoenamel
junction
Define contact area -
correct answer ✅The point or area where approximating teeth in
the same arch touch or meet each other
What is the functions of the contact area? -
correct answer ✅To keep food from packaging between the teeth
and to help stabilize the dental arches by combining the anchorage
of all teeth in either arch
What is an embrasure? -
correct answer ✅The spaces adjacent to and surrounding the
contact of the teeth in the same arch
Where is enamel the thickest? -
correct answer ✅At the incisal or occlusal areas
,EFDA Review Exam Questions &
Answers (Grade A+)
What is enamel's composition? -
correct answer ✅95% inorganic matter, mainly hydroxyapatite,
and 5% organic matter and water
______ is the hardest tissue in the body -
correct answer ✅Enamel
____ is the second hardest material in the body -
correct answer ✅Dentin
_____ provides support for enamel and increases in hardness as it
ages -
correct answer ✅Dentin
When scratching dentin with an explorer, it exhibits a ____ sound
opposed to the sharp higher pitch of enamel -
correct answer ✅Dull
Dentin is composed of -
correct answer ✅70% inorganic matter, 20% organic matter, and
10% water
, EFDA Review Exam Questions &
Answers (Grade A+)
Primary dentin -
correct answer ✅Is produced before the tooth erupts and shortly
after eruption
Secondary dentin -
correct answer ✅Is a continuation of primary dentin that forms at
a slower rate as the tooth ages and throughout the life of the tooth
Reparative/Tertiary dentin -
correct answer ✅Forms rapidly when the tooth has received an
excessive stimulus from caries, cavity preparation, or other trauma
___ is the hard dental tissue covering the anatomical roots of the
teeth -
correct answer ✅Cementum
What has the highest fluoride content of all the materialized tissue?
-
correct answer ✅Cementum
