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Oral Anatomy > Lec III - he Teeth and its Supporting Structures > Flashcards

Lec III - he Teeth and its Supporting Structures Flashcards

1
Q

What are the functions of the teeth

A
  1. Mastication – primary function
  2. Speech
  3. Esthetics – appearance
  4. Protection
  5. Prehensile
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2
Q

the study of the structures and forms of teeth

A

Tooth morphology

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3
Q

what are the three anatomical features of the tooth?

A
  1. Crown
  2. Root
  3. Cervix/neck/cervical line
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4
Q

visible in the mouth and covered with enamel

A

Crown

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5
Q

covered wiht cementum

A

Root

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6
Q
  • neck of the tooth

- connects the root and crown

A

Cervix / neck / cervical line

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7
Q

What are the two types of crown terminologies according to the position of the crown?

A
  1. Anatomical Crown

2. Clinical Crown

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8
Q

the part of the crown of a tooth covered by enamel surface

A

Anatomical Crown

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9
Q

part of the tooth that is visible or exposed in the mouth.

A

Clinical Crown

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10
Q

What are the two types of crown terminologies on the basis of whether the root is visible in the oral cavity

A
  1. Anatomical Root

2. Clinical Root

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11
Q

the portion of tooth that is covered with cementum

A

Anatomical Root

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12
Q

the portion of tooth which is not visible in the mouth.

A

Clinical Root

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13
Q

The tooth may have a single root or a multiple root with _______ or ________

A

bifurcation or trifurcation

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14
Q

single root can be seen in:

A

anterior teeth, mandibular premolars, and maxillary 2nd premolars

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15
Q

Multiple roots can be seen:

A
  • moalrs

- maxillary first premolars, mandibular molars

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16
Q

the division of the root into two or three segments

A
  • anterior teeth, mandibular premolars, and maxillary 2nd premolars
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17
Q

part of the root which starts from the cervical line to the furcation area of multirooted teeth

A

Root trunk

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18
Q

aperture or opening at or near the apex of a tooth root through which the blood and nerve supply of the pulp enters the tooth

A

Apical Foramen

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19
Q

the portion of the jaw that supports the teeth

A

Alveolar Porcess

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20
Q

bony sockets in which the tooth fits

A

Alveolus

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21
Q

the teeth in upper part of the jaw

A

Maxillary Teeth

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22
Q

the teeth in the lower part of the jaw

A

Mandibular Teeth

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23
Q

The four tooth tissues

A

1, Enamel

  1. Dentin
  2. Cementum
  3. Dental Pulp
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24
Q

the only soft tissue

A

Dental Pulp

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25
Q
  • outer surface of anatomic crown
  • Most densely mineralized
  • Hardest tissue in the human body
A

Enamel

26
Q

what is the chemical composition of the enamel

A

96% inorganic and 4% organic matter and water

27
Q
  • Primary component is hydroxyapatite
  • Extremely brittle and dependent on the underlying dentin for support
  • Semi-translucent and yellow to grayish-white in appearance
  • cannot be restored but has the ability to remineralize
A

Enamel

28
Q

Enamel develops from the enamel organ (ectoderm) by the formation of a specialized type of epithelial cell called

A

Ameloblast

29
Q

the process of enamel formation

A

Amelogenesis

30
Q

the interface between dentin and enamel.

A

Dentinoenamel Junction

31
Q
  • It is the main portion or body of the tooth
  • Comprises the greatest bulk of the tooth
  • Hard, dense, and calcified tissue
A

Dentin

32
Q

chemical composition of the dentin

A

-70% organic and 30% organic matter and water

33
Q

the dentin develops from _______ which are the specialized cells that develop from the dental papilla

A

Odontoblast

34
Q

the process of formation of dentin

A

Dentinogenesis

35
Q
  • mineralized dental tissue covering the anatomic roots of the tooth.
  • main function is to provide a medium for attachment of the tooth to the alveolar bone
  • not as dense or as hard as enamel or dentin but is more dense than bone
  • thinner at the cervical area than the apical portion of the root
A

Cementum

36
Q

chemical composition of the cementum

A

45% to 50% inorganic and 50% to 55% organic components

37
Q

the cementum develops from ____ which is a specialized type of cell

A

Cementobalst

38
Q

the union of cementum and the dentin

A

Dentinocemental Junction

39
Q

two types of cementum

A
  1. Acellular Cementum
    • Covers apical 2/3 of the root
  2. Cellular Cementum
    • Covers apical 2/3 of the root
40
Q

occupies the central portion of the tooth

A

pulp/ pulp cavity

41
Q

the pulp is composed of blood vessels, lymph vessels, connective tissue, nerve tissue, and special dentin-formation cells called

A

Odontoblast

42
Q
  • Nourishing, sensory, and dentin-reparative system of the tooth
A

Pulp

43
Q

two divisions of the pulp

A
  1. Pulp Chamber

2. Pulp Canal

44
Q

an area of the pulp housed within the coronal portion of the tooth

A

Pulp Chamber

45
Q

an area of the pulp located within the roots of the tooth.

A

Pulp Canal

46
Q

runs the entire length of the interior of the tooth from the tip of the pulp chamber, pulp horns, to the apex of root canal.

A

Pulp Cavity

47
Q

the supporting structures of the teeth are collectively known as the

A

Periodontium

48
Q

The periodontium consists of the:

A

a. cementum
b. periodontal ligaments
c. alveolar process
d. gingiva

49
Q

Divisions of the periodontium

A

a. Gingival Unit

b. Attachment unit or attachment apparatus

50
Q

contains fibers extending to the periodontal ligament that hold the root of the tooth in the socket

A

Cementum

51
Q
  • surrounds the root of the tooth

- comprised of fibers or ligaments that suspend the tooth in the alveolus or socket

A

Periodontal Ligament

52
Q

the portion of the maxilla and mandible that surrounds the roots of the teeth

A

Alveolar Process

53
Q

the only portion of the periodontium visible in the oral cavity

A

Gingiva

54
Q

the Gingival Unit consists of:

A
  1. Free Gingigiva
  2. Attached Gingiva
  3. Alveolar Mucosa
55
Q

the Attachment Unit consists of:

A
  1. Cementum
  2. Alveolar Bone
  3. Periodontal Ligament
56
Q

What are the Fibers of the Periodontal Ligaments?

A
  1. Alveolar Crest Group
  2. Horizontal Group
  3. Oblique Group
  4. Apical Group
  5. Interradicular Group
57
Q

Fibers extending from the cervical area of the tooth to the alveolar crest

A

Alveolar Crest Group

58
Q

fibers extending horizontally from the tooth to the alveolar bone

A

Horizontal Group

59
Q

Fibers running obliquely from the cementum to the bone

A

Oblique Group

60
Q

Fibers radiating apically from the tooth to the bone

A

Apical Group

61
Q

Periodontal fibers between the root of multirooted teeth

A

Inetrradicular Group

Oral Anatomy (9 decks)

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