Dentition Flashcards
Where are the teeth found?
Within the alveoli of the maxillae and mandible
What are the functions of the teeth
mastication and an articulatory surface for some speech sounds
How many teeth are there?
32
What are the four types of teeth?
incisors, cuspids (canines), bicuspids (pre-molars), and molars
Each tooth has a _____, which hides beneath the gum line or ______.
root; gingiva
What is infection of the gums known as?
gingivitis
What is the visible one-third of the tooth called?
the crown
The juncture (meeting) of the root and crown is the ____.
neck
What is the crown’s surface made of?
dental enamel
What does the dental enamel lie on top of?
the dentin or ivory of the tooth
What is the pulp of a tooth?
the heart of a tooth and where the nerve resides
What holds the tooth in the socket?
cementum - a thin layer of bone
What are the five tooth surfaces?
medial, distal, buccal, lingual, and occlusal
What is the medial surface?
surface towards the midline
What is the distal surface?
surface away from the midline
What is the buccal surface?
cheek side
What is the lingual surface?
tongue side
What is the occlusal surface?
contact surface between upper and lower teeth
What are the incisors used for?
cutting
What are the cuspid (canine)
a type of tooth that has a single cusp or point for tearing
What are the bicuspids (premolars)
a type of tooth that has 2 cusps or points for tearing
What are the molars?
a type of tooth that is large, has great occlusion surface (can make lots of contact), and is made for grinding;
What is the largest molar?
1st molar
What molar is the wisdom teeth?
3rd molar
What is dentition?
the condition and arrangment of teeth
When do baby (primary) teeth typically appear?
6-33 months
When do permanent teeth typically appear?
6-21 years
When do the central incisors develop in a newborn child’s upper teeth?
8-13 months
When do the central incisors develop in a newborn child’s lower teeth?
6-10 months
When do the cuspids develop in a newborn child’s upper and lower teeth?
16-23 months old
When do the first molars develop in a newborn child’s upper and lower teeth?
13-19 months
When do the second molars develop in a newborn child’s upper and lower teeth?
23-33 months
For permanent teeth, when do the central incisors develop?
6-8 years old
For permanent teeth, when do the lateral incisors develop?
7-9 years
For permanent teeth, when do the cuspids (canines) develop?
9-12 years old
For permanent teeth, when do the bicuspids (pre-molars) develop?
9-12 years old
For permanent teeth, when do the second molars develop?
11-13 years old
For permanent teeth, when do the third molars develop?
17-21 years old
What is molar occlusion?
Bringing the upper and lower teeth together; for mastication to occur, it must happen properly
What is considered a normal Class I molar relationship?
When the mandibular first molar occludes a bit anteriorly with the maxillary first molar
What is a normal Class I molar relationship also known as?
neutroclusion
What is a Class I maloclusion?
when the incisors are oriented abnormally but the bite is normal (i.e. the mandibular first molar occludes the maxillary first molar)
What is Class II maloclusion?
when the cusp of the mandibular first molar occludes posteriorly with the cusp of the maxillary first molar.
What are the two divisions of class II maloclusion?
Division I: overjet and Division II: overbite
In an overjet, there is ______, whereas in an overbite, there is __________.
horizontal protrusion; vertical overlap
What is Class III maloclusion?
The cusp of the mandibular first molar occludes very anteriorly with the cusp of the maxillary first molar; involves underbite
What is torsiversion?
rotated or twisted on its long axis
What is labioverted?
tilted towards the lips
What is linguoverted?
tilted toward the tongue
What is distoverted?
tilted away from the midline
What is mesioverted?
tilted toward the midline
What is infraverted?
not erupted far enough to make occlusal contact
What is supraverted?
erupted too far and disrupts occlusal contact in other places
