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The term used to describe the natural teeth in the jaws
dentition
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First dentition to be formed, aka baby teeth/deciduous dentition
Primary dentition
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Second dentition to develop, aka adult teeth/permanent dentition
Permanent dentition
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Dentition consisting of both primary and permanent dentitions
Mixed dentition
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What is the numbering system most widely used in the US?
Universal Numbering System
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Teeth are designated using a two digit code, used internationally
International Numbering System
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Commonly used in orthodontic therapy
Palmer Notation Method
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When does the primary dentition period begin?
Eruption of the primary mandibular central incisors, between 6 months and 6 years of age
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When does the mixed dentition begin?
Between 6 and 12 years of age, both primary and permanent teeth are present
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When does the permanent dentition begin?
Begins with the shedding of last primary tooth, after 12 years of age.
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The method by which teeth of the mandibular arch come into contact with those of the maxillary arch
Occlusion
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Anterior teeth
Incisors and canine
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Posterior teeth
Premolars and molars
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How many quadrants are in the oral cavity?
4
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D-A-Q-T System
- D dentition
- A arch
- Q quadrant
- T tooth type
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What do we use when describing an individual tooth?
DAQT system
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Anatomic crown
Part covered by the enamel
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Clinical crown
Part of the anatomic crown that is visible and not covered by the gingiva (what we see clinically)
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Anatomic root
Part of the root covered by cementum
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Clinical root
Part of the anatomic root that is visible, related to gingival recession
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An imaginary line representing the long axis of the tooth
Root axis line (RAL)
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Surfaces of the root that have depressions, commonly occur on the proximal root surfaces of anteriors and posteriors
Root concavities
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Chewing surface of the crown (incisal for anteriors and occlusal for posteriors)
Masticatory surface
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Closest to the midline
Mesial surface
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Farthest away from midline
Distal surface
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Between the mesial and distal surfaces of adjacent teeth
Proximal
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Area between adjacent tooth surfaces
Interproximal space
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Crowns of adjacent teeth physically touch each adjacent proximal surface
Contact area
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Greatest elevation of the tooth
Height of contour
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What is the height of contour also known as?
Crest of curvature
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When two teeth in the same arch come into contact, the curvature next to the contact area forms this space
Embrasures
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Function of incisors
Biting and cutting
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Function of canines
Pierce of tear food
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Function of premolars
Assist canines and molars
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Function of molars
Grinding food
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All anterior teeth are formed by ___ developmental lobes, ___ labial lobes, and __ lingual lobe.
- 4 developmental
- 3 labial (mesiolabial, middle labial, and distolabial)
- 1 lingual
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Raised rounded area on the cervical third of the lingual surface
Cingulum
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Rounded raised border on the lingual surface of anteriors and is bordered medially and distally on each side
Marginal ridge
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How many teeth are in the primary dentition?
20
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How many teeth are in the permanent dentition?
32
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What teeth are not considered succadenous?
Permanent molars
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When do roots complete formation?
2-3 years after the tooth erupts
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Maxillary central incisor
- Cut/bite
- age 7
- 1 1/2 size of the lateral incisor
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When does the first molar erupt?
Age 6
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What is the most frequently congenitally missing tooth?
Mandibular second premolars followed by the maxillary lateral incisors
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What are the smallest teeth in the mouth?
Mandibular central incisors
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Canine has the ________ _________
Longest root
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When does the mandibular central erupt?
Age 6-7
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