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In the Federation Dentaire International System for numbering, the first number represents a
_________, while the second number represents a _________.
CORRECT ANS>>quadrant, tooth
What is the visible portion of the anatomical crown known as?
CORRECT ANS>>the clinical crown
The area where the roots divide
CORRECT ANS>>furcation
The point or area where approximating teeth in the same arch touch or meet each other is referred to
as the ________.
CORRECT ANS>>contact area
Where are the TWO purposes of contact areas?
• -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 ANS>>the furrow
What is the HARDEST tissue in the body?
CORRECT ANS>>enamel
What cells form enamel?
CORRECT ANS>>ameloblasts
The bulk of the tooth is made up of
CORRECT ANS>>dentin
In permanent teeth, the process of enamel formation is completed about ___ years before eruption.
CORRECT ANS>>3
What is the composition of enamel?
CORRECT ANS>>95% inorganic matter, 5% organic matter and water
What is the SECOND hardest material in the body?
CORRECT ANS>>dentin
What is the composition of dentin?
CORRECT ANS>>70% inorganic, 20% organic, 10% water
,The three major types of dentin
CORRECT ANS>>primary, secondary, reparative
What type of dentin is a DEFENSE reaction to an area of injury?
CORRECT ANS>>reparative dentin
What has the HIGHEST fluoride content of all the materialized tissue?
CORRECT ANS>>cementum
The two types of cementum
CORRECT ANS>>acellular and cellular
What type of cementum ACTIVELY produces new layers of cementum throughout the life of the tooth?
CORRECT ANS>>cellular
What teeth have the cusp of Carabelli?
CORRECT ANS>>maxillary first molars
The ridge formed by the union of two triangular ridges
CORRECT ANS>>transverse ridge
The spillway provides an escape for food from the _______ surface during the mastication (chewing)
process.
CORRECT ANS>>occlusal
, The uncut tooth structure adjacent to the cavity prep
CORRECT ANS>>cavosurface
line angle
CORRECT ANS>>two walls
point angle
CORRECT ANS>>three walls
A thin soft tissue that is loosely attached to the underlying bone
CORRECT ANS>>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 ANS>>True
When seated, the thighs should be _______ to the floor
CORRECT ANS>>parallel
The chair is raised or lowered to achieve ____ to ____ inches distance between the patient's face and
the operator's face
CORRECT ANS>>12 to 14