Anatomy Flashcards
When does the primary dentition start forming?
14 weeks in utero
When do the first teeth appear?
About 6 months
When do the first permanent teeth appear?
6 years
Where do the crown and root of the tooth meet?
Cementoenamel junction
The cementoenamel junction is also known as ?
Cervical line
Where is the pulp chamber found?
The crown
What are the four tissues of the teeth?
Enamel
Dentin
Cementum
Pulp
Enamel, cementum, and dentin are known as hard or soft tissue?
Hard
Tooth surface towards the lips.
Labial
Tooth surface towards the tongue?
Lingual
Tooth surface facing the cheeks?
Buccal
What is a cusp?
An elevation or mound on the crown portion of the teeth.
When does the primary central incisor on the maxilla erupt?
8-12 months
When does the primary central incisor on the maxilla exfoliate?
6-7 yrs
When does the primary maxillary lateral incisor erupt?
9-13 months
When does the primary maxillary later incisor exfoliate?
7-8 yrs
When does the primary maxillary canines erupt?
16-22 months
When do the primary maxillary canines exfoliate?
10-12 yrs
When do the primary maxillary first molars erupt?
13-19 months
When do the primary maxillary first molars exfoliate?
9-11 yrs
When do the primary maxillary second molars erupt?
25-33 months
When do the primary maxillary second molars exfoliate?
10-12 yrs
When do the mandibular primary second molars erupt?
23-31 months
When do the mandibular primary second molars exfoliate?
10-12 yrs
When do the mandibular primary first molars erupt?
14-18 months
When do the mandibular primary first molars exfoliate?
9-11 yrs
When do the mandibular primary canines erupt?
17-23 months
When do the mandibular primary canines exfoliate?
9-12 yrs
When do the mandibular primary lateral incisors erupt?
10-16 months
When do the mandibular primary lateral incisors exfoliate?
7-8 yrs
When do the mandibular primary central incisors erupt?
6-10 months
When do the mandibular primary central incisors exfoliate?
6-7 yrs
What do succedaneous teeth replace?
Exfoliated deciduous teeth
Are there any permanent teeth that aren’t technically succedaneous teeth? If so which ones?
Yes, the permanent molars
What is the number to remember the order of permanent teeth arrival of the maxilla?
781-0062
What is the number to remember the order of the permanent teeth arrival of the mandible?
679-0161
When do the third molars come in on both the maxilla and the mandible?
17-21 yrs
What is the Palmer numbering system?
87654321 | 12345678
87654321 | 12345678
EDCBA | ABCDE
EDCBA | ABCDE
What is the universal numbering system?
1-16 on the maxilla
16-32 on the mandible
A-T on the primary dentition
Is the pulp soft or hard tissue?
Soft
What are incisors used for?
A single ridge used as a cutting edge
Where are cusps found?
Canines
Premolars
Molars
On what teeth do you find single roots?
Incisors
Canines
Premolars except 1st maxillary pre-molar
On what teeth do you find two roots?
1st Maxillary pre molars
mandibular molars
On what teeth do you find three roots?
On the maxillary molars
Where is the roots of the teeth held in the jaw?
Alveolar processes
How many line angles are found in the anterior teeth?
6
How many line angles are found in the posterior teeth?
8
How many point angles are found in the anterior teeth?
4
How many point angles are found in the posterior teeth?
4
What tooth is the widest of any of the anterior teeth?
Central Incisor
Is the labial surface on the maxillary central incisor more or less convex than the maxillary lateral incisors and canines?
Less
What appearance/shape does the maxillary central incisor have?
Trapezoidal
Which angle is more rounded on the maxillary central incisors?
The distal angle
What is the Cervico-Incisal edge length on the maxillary central incisor?
10.5mm
What is the mesial-distal length on the maxillary central incisor?
8.5 mm
How long is the root of the maxillary central incisor?
12.5 mm about 2-3mm longer than the crown
Is the curvature of the cervical line on the maxillary central incisor greater on the mesial or distal side?
Mesial
From the Incisal view of the maxillary central incisor what is the shape of the crown?
Triangular
What is the shape of the maxillary central incisor on the mesial or distal views?
Wedge or Triangular
Where is the pulp cavity the widest in the maxillary central incisor?
Cervical area
What tooth varies more than any other with the exception of the third molar?
Maxillary lateral incisor
When does calcification of the teeth begin?
13-16 weeks in utero
Is the cementum thicker or thinner in the permanent teeth when compared to the primary teeth?
It is thicker in the Permanent teeth
Which teeth have the smallest mesiodistal dimensions?
Mandibular incisors
What is the smallest tooth?
Mandibular central incisors
The root of the mandibular central incisor wider in which view/direction?
The labiolingual
How do you distinguish between the mandibular central and lateral incisors?
The incisal edge is at right angles with labiolingual bisecting line
