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A Restorative dentistry > Morphology of Teeth > Flashcards

Morphology of Teeth Flashcards

1
Q

I. Basics
1. What is Anatomical crown?

A

The part of the tooth covered by enamel

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2
Q

I. Basics
2. What is Clinical crown?

A

The part of the tooth visible in the oral cavity

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3
Q

I. Basics
3. What is Anatomical root?

A

The part of the tooth covered by cementum

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4
Q

I. Basics
4. What is Clinical root?

A

The part of the tooth lies within the alveolus

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5
Q

I. Basics
5. What is Cementoenamel junction (CEJ)?

A

The part of the tooth where 2 vital protecting substances (enamel +cementum) meet

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6
Q

II. Numbers & Orientations of teeth
1A. What is the number of teeth in adults?

A

32

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7
Q

II. Numbers & Orientations of teeth
1B. In each quadrant, how many teeth are present in adults? What are they?

A

In each quadrant 8 teeth are present:

1 Central Incisor
1 Lateral Incisor
1 Canine
2 Premolars (bicuspid)
3 Molars (last molar named as Wisdom)

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8
Q

II. Numbers & Orientations of teeth
2A. What is the number of teeth in children?

A

20

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9
Q

II. Numbers & Orientations of teeth
2B. In each quadrant, how many teeth are present in adults? What are they?

A

In each quadrant 5 teeth are present:

1 Central Incisor
1 Lateral Incisor
1 Canine
2 Molars

NO PREMOLARS

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10
Q

III. Morphology of teeth
1. Describe Maxillary first (central) permanent incisor

A

Crown:
The shape is similar to the shovel or chisel

Cervical section:
Circular (also triangular) shape

Root:
1 root – 1 rootcanal

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11
Q

III. Morphology of teeth
2. Describe Maxillary second (lateral) permanent incisor

A
  1. Crown:
    It is smaller, but similar to the first incisor. Note: The mesial angle is rounded.
  2. Cervical section:
    Flattened in mesiodistal direction (or can be circular shaped).
  3. Foramen coecum is on the palatal
  4. 1 root – 1 rootcanal
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12
Q

III. Morphology of teeth
3. Describe Maxillary permanent canine

A
  1. Crown:
    - Wedge shaped
    - The edges beginning from tip of the cusp divides the vestibular coronal surface into two parts:
    +) 1/3 — smaller part
    +) 2/3 — bigger part
  2. Cervical section:
    - Rounded equilateral
  3. Root:
    - 1 root – 1 rootcanal
    - It has the longest and strong root (20-22 mm) among the teeth
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13
Q

III. Morphology of teeth
4. Describe Mandibular first (central) permanent incisor

A
  1. Crown:
    - Chisel shaped
    - Smallest tooth of the oral cavity!
  2. Cervical section: Elliptic
  3. Root: 1 root – 1 rootcanal (1/4 contain 2 root canals)
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14
Q

III. Morphology of teeth
5. Describe Mandibular second (lateral) permanent incisor

A
  1. Crown: Chisel shaped & bit bigger then the 1st lower incisor.
  2. Cervical section: Rectangular with rounded angles
  3. Root: 1 root – 1 rootcanal
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15
Q

III. Morphology of teeth
6. Describe Mandibular permanent canine

A
  1. Crown:
    - It is similar to the upper canine, but smaller and rounded shaped.
  2. Cervical section: Ellipsoid shaped
  3. Root: 1 root – 1 root canal
    -> It has the second longest root among the teeth!
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16
Q

III. Morphology of teeth
7. Describe Maxillary first premolar (bicuspid)

A
  1. Crown:
    - 2 cups: 1 buccal - 1 palatal
    - Mesial surface is concave!
  2. Cervical section: Finger biscuit
  3. Root:
    - 2 roots – 2 canals:1 buccal, 1 palatal
17
Q

III. Morphology of teeth
8. Describe Maxillary second premolar (bicuspid)

A
  1. Crown:
    - It is smaller, and similar to the first premolar
    - The cusps are totally the same.
  2. Cervical section: Irregularly flattened
  3. Root:
    1 root – 1 root canal
    (Rarely it has 2 canals or 2 roots!)
18
Q

III. Morphology of teeth
9. Describe Mandibular first premolar (bicuspid)

A
  1. Crown:
    - 2 cusps – 1 buccal, 1 lingual
    - Buccal cusp bigger than the lingual cusp.
    - The occlusal surface diverges to the lingual surface
  2. Cervical section: Irregular flattened shape (in mesiodistal direction)
  3. Root: 1 root - 1 canal
19
Q

III. Morphology of teeth
10. Describe Mandibular second premolar (bicuspid)

A
  1. Crown:
    - It is bigger than the lower first premolar.
    - It may have 2 or 3 cusps: 1 buccal cusp - 1 or 2 lingual cusps
  2. Root:
    1 root – 1 canal
20
Q

III. Morphology of teeth
11A. Describe the crown of Maxillary first molar

A

A. 4 cusps
- MB (mesiobuccal)
- DB (distobuccal)
- MP (mesiopalatal)
- DP (distopalatal)

B. MP cusp is the biggest, and it has a special cusp: tuberculum animal carabelli

C. Between MP - DB cusps, there is a protection named as crista transversa

D. DP is the smallest

E. There is foramen coecum on the palatal surface of the tooth

21
Q

III. Morphology of teeth
11B. Describe the root of Maxillary first molar

A

3 roots – 3 or 4 canals
MB – 1 or 2 canals
DB - 1 canal - it is the weakest root!
P - 1 canal – it is the biggest root!

22
Q

III. Morphology of teeth
12. Describe the Maxillary second molar

A
  1. Crown: It is smaller than the first molar & the shape is variable.
  2. Root:
    - 3 root – 3 rootcanal
    - MB
    - DB
    - P
23
Q

III. Morphology of teeth
13. Describe the Maxillary third molar

A
  1. Crown: The shape is variable! 2-6 cusps!
  2. Root: Number & form of roots are variable too!
24
Q

III. Morphology of teeth
14A. Describe the crown of mandibular first molar

A

A. 5 cusps:
MB (mesiobuccal)
DB (distobuccal)
D (distal)
ML (mesiolingual)
DL (distolingual)

B. MB cusp is the largest!
DB cusp is the smallest!

C. Among the cups there are fissures

D. There is foramen coecum on the buccal surface

25
Q

III. Morphology of teeth
14B. Describe the root of mandibular first molar

A

2 roots - Mesial & distal roots
M root – 2 canals: MB, ML canals
D root – 1 canal

26
Q

III. Morphology of teeth
15. Describe Mandibular second molar

A
  1. Crown:
    - 4 cusps: MB, DB, ML, DL
    - There are 2 fissures, they are perpendicular to each other.
    - There is foramen coecum is on the buccal surface.
  2. Root:
    - 2 roots: Mesial & Distal roots
    - M root – 1 or 2 canal(s)
    - D root – 1 canal
27
Q

III. Morphology of teeth
16. Describe Mandibular third molar

A
  1. Crown:
    - Smaller than the lower second molar.
    - Sometimes it has 4 or 5-6 cusps.
  2. Root:
    - Usually it has 2 roots: Mesial & Distal roots, or sometimes it can have 1-4 roots!

A Restorative dentistry (10 decks)

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