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Anatomy/histology quiz 2
over view of the dentitions
35
Anatomy
Professional
09/09/2008

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Term
what is the function of incisors?
Definition
biting and cutting
Term
what is the function of canines?
Definition
pierce or tear food
Term
what is the function of premolars?
Definition
tearing and grinding
Term
what is the function of canines?
Definition
pierce or tear food
Term
what is the function of premolars?
Definition
tearing and grinding
Term
what is the function of molars?
Definition
grinding
Term
dentition
Definition
the natural teeth in the jaw bones
Term
primary dentition
Definition
baby teeth. also called deciduous dentition
Term
permanent dentition
Definition
adult teeth, secondary dentition
Term
Universal tooth designation system
Definition
tooth naming system most commonly used in the states. Primary teeth are A-T. Secondary teeth are 1-32. Starts with maxillary right, moves clock wise ending with mandibular right.
Term
International standards organization designation system (ISO)
Definition
teeth are designated using a two digit code. The first digit refers to the quadrant and the second digit refers to the tooth within that quadrant. *probably not on quiz but may be on boards*
Term
how many periods of dentition are there, and what are they?
Definition
3, primary dentition period, mixed dentition period, permanent dentition period
Term
when does the primary dentition period occur?
Definition
approximately between the ages of 6 months and 6 years. Starts with eruption of primary mandibular central incisors. Ends with the first permanent mandibular molar erupts.
Term
when does the mixed dentition period occur?
Definition
approximately between the ages of 6 years and 12 years. Starts when first permanent mandibular molar erupts and ends when the last primary tooth is shed.
Term
When does the permanent dentition period occur?
Definition
When the last primary tooth is shed
Term
anatomical crown
Definition
portion of the crown covered by enamal
Term
clinical crown
Definition
visible tooth structure not covered by gingiva. CAN include portions of the root if root is visible. (can change over time if gingival recession/swelling occurs)
Term
anatomical root
Definition
portion of the root covered by cementum
Term
root concavities
Definition
indentations in root surfaces
Term
root axis line (RAL)
Definition
imaginary line that is parallel to the long axis of the tooth
Term
facial surface
Definition
closest to the face
Term
lingual surface
Definition
closest to the tongue
Term
labial surface
Definition
closest to the lips
Term
buccal surface
Definition
closest to the cheek
Term
palatal surface
Definition
closest to the palate
Term
incisal surface
Definition
biting surface of anterior teeth
Term
occlusal surface
Definition
biting surface of posterior teeth
Term
interproximal space
Definition
the area between where two teeth meet
Term
contact area
Definition
the area where the crowns of two adjacent teeth touch each other on their proximal surfaces
Term
height of contour
Definition
also called crest of curvature
the greatest elevation of the tooth occlusocervically on a specific surface of the crown.
aka: the widest part
Term
embrasures
Definition
triangular shaped space between 2 teeth created by the inward sloping of those teeth. It is continuous of the interproximal space.
Term
line angle
Definition
imaginary line formed by the junction of two surfaces on a tooth. The name is a combination of those two surfaces. eg where the mesial surface meets the occlusal surface it's called the mesio-occlusal.
Term
point angle
Definition
the junction of 3 surfaces on a tooth. eg the distolinguo-occlusal
Term
thirds
Definition
division of a crown into thirds. can be horizontal or vertical. Roots can also be divided into thirds.
Term
thirds
Definition
division of a crown into thirds. can be horizontal or vertical. Roots can also be divided into thirds.
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