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ADAT Study > Dental Anatomy > Flashcards

Dental Anatomy Flashcards

1
Q

Anatomical Crown

A

Area of tooth covered by enamel

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2
Q

Clinical Crown

A

Part of tooth above gingival margin

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3
Q

Clinical root

A

Unerupted part fo the root below the gingival crest

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4
Q

Anatomical root

A

Root below the CEJ

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5
Q

Enamel

A

Formed by ameloblasts
96% Inorganic
Thickest near crown tips and thinnest near CEJ

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6
Q

Dentin

A

Largest portion of the root and almost the entire root
70% Inorganic
Produced by odontoblasts
Continues to form after eruption (Secondary dentin)

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7
Q

Repairative dentin

A

forms in response to trauma to decrease sensitivity

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8
Q

Cementum

A

Most similar to bone
65% inorganic
Thickest at apex
Cellular at the apex and can reproduce itself

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9
Q

Pulp

A

Nerve, blood, and lymph
Source of nutrients
Pulp produce odontoblasts
Shape and size can be affected by function and age

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10
Q

Pulp stones

A

Calcified areas in the pulp
Seen on radiographs

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11
Q

Maxillary Central Incisors

A

Erupt 7-8 years old
Most prominent and widest MD of anteriors
Root cross section is round and crown is triangular
Lingual has smooth broad fossa with prominent cingulum

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12
Q

Maxillary Lateral Incisor

A

Erupt 8-9 years old
Varies more than any other tooth
Prominent lingual pit
Deep DL groove that extends to root surface
Root cross section is oval
Most common with Dens in Dente
Could be congentically missing

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13
Q

Maxillary Canine

A

Erupts 11-12 years old
Longest root in the mouth
Anchor tooth held in by canine eminance
Largest cingulum of anterior teeth

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14
Q

Maxillary First Premolar

A

Erupts 10-11 years old
2 Cusps Buccal and Lingual
Most likely to be exo’ed for ortho do less flatness
Most have two roots
Mesial surface has a longitudinal depression (concavity)
Larger than second premolar

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15
Q

Maxillary Second Premolar

A

Erupts 10-12 years old
USally has one root but could have two canals

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16
Q

Maxillary First Molar

A

Erupts at 6 years old
5 cusps (Cusp of Carabelli attahced to ML)
3 roots and palatal is the largest
Most difficult to root plane
Prominent oblique ridge
More square in shape

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17
Q

Maxillary Second Molar

A

Erupts 11-13 yearws old
All cusps smaller than first molar
Three roots
More secondary anatomy and pits on occlusal
More rhomboidal on occlusal

18
Q

Maxillary Third Molar

A

Maxillary 17-22 years old
Varies more than any other tooth in size and shape
Smallest in width
Usually lack DL cusps
Trifucated but roots are usually fused together
Occlusal is usually heart shaped

19
Q

Mandibular Central Incisor

A

Erupt 6-7 years old
Smallest teeth in the mouth
Bilaterally Symetrical
Only occlude with one tooth

20
Q

Mandibular Lateral Incisor

A

Erupt 7-8 years old
Slightly more convex
Twisted more distal

21
Q

Mandibular Canine

A

Erupt 9-10 years old
Longest root in mandibular
Smooth lingual surface
May be bifuracted at the apex

22
Q

Mandibular First Premolar

A

Erupts 10-12 years old
Always smaller than Mandibular second premolar
Functions more like a canine

23
Q

Mandibular Second Premolar

A

Erupts 11-12 years old
Larger than first premolar
Can have two or three cusps
Y is more common three cusp form
functions more like a molar
One root that is longer and wider than first premolar

24
Q

MAndibular First Molar

A

Erupts 6-7 Years
5 cusps
Wider MD than BL
Largest tooth in mandibular arch
Grooves converge into central fossa
Distal root is shorter than mesial

25
Q

Mandibular Second Molar

A

Erupts 11-13 years old
4 cusps
Roots are shorter and closer together

26
Q

Mandibular Third Molar

A

Erupts 17-21 years old
Most varied of mandibular teeth
More oval in shape
Smallest crown of molars

27
Q

Number of primary teeth

A

20 teeth A->T

28
Q

Leeway sapce

A

Primary molars are wider than replacing premolars

29
Q

Enamel thickness permanent vs primary

A

primary teeth are thinner than permanent

30
Q

Root Trucks

A

Smaller in primary than permanent

31
Q

Primary Incisors

A

Similar outline to permanent but no lingual pit or mamelons

32
Q

Primary Maxillary Canine

A

sharp cusp and mesial cups ridge is longer than distal

33
Q

Primary Tooth Eruption

A

Central Incisors 6-7 months
Lateral Incisors 8-9 months
Canines 18 months
First Molars 12 months
Second Molars 20 months

34
Q

Primary Hard Tissue Formation

A

In utero 4-6 months

35
Q

Primary Crowns Completed

A

1.5 - 10 months of age

36
Q

Primary Roots Completed

A

1.5 - 3 years of age

37
Q

Root Resorption of Primary Teeth

A

Pressure from permanent teeth

38
Q

Permanent Tooth Formation

A

Birth to 3 years

39
Q

Crowns of Permanent Teeth

A

4-8 years old (half the age of eruption)

40
Q

Roots of Permanent Teeth

A

2-3 years after eruption

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