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Dental Anatomy > Unit 1 - The Tooth > Flashcards

Unit 1 - The Tooth Flashcards

1
Q

Outermost tissue of the tooth

A

Enamel

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2
Q

Makes up the bulk of the tooth

A

Dentin

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3
Q

Dentin forming cells

A

Odontoblasts

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4
Q

Made up by pulp chamber and root canal

A

Pulp cavity

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5
Q

The space in the center of the crown of a tooth occupied by the major portion of the dental pulp, mainly coronal pulp

A

Pulp chamber

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6
Q

Extension of pulp tissue into a thin point of the pulp chamber in the tooth crown

A

Pulp horns

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7
Q

The portion of the pulp located in the crown portion of the tooth

A

Coronal pulp

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8
Q

Pulp located in the root area of tooth

A

Radicular pulp

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9
Q

Tissues of the tooth

A

Enamel, Dentin, Cementum, and Pulp

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10
Q

Hard tissues of the tooth

A

Enamel, Dentin, Cementum

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11
Q

Soft tissue of the tooth

A

Pulp

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12
Q

Tissue inside tooth consisting of blood vessels and nerve

A

Pulp

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13
Q

Hard tissue of the tooth that covers the root of the tooth

A

Cementum

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14
Q

The junction between dentin and enamel

A

Dentinoenamel Junction (DEJ)

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15
Q

The junction between dentin and cementum

A

Dentinocemental Junction (DCJ)

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16
Q

Hard calcified tissue that covers the anatomic crown portion of the tooth. It surrounds the dentin

A

Enamel

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17
Q

Hardest tissue in the human body

A

Enamel

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18
Q

Hard calcified tissue making up the bulk of the tooth; light yellow, very porous

A

Dentin

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19
Q

Enamel forming cells

A

Ameloblasts

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20
Q

Root portion of pulp cavity; contains radicular pulp

A

Pulp canal (Root Canal)

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21
Q

The junction line between the enamel layer and the cementum layer of the tooth

A

Cementoenamel Junction (CEJ)

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22
Q

The identifiable line around the external surface of a tooth where the enamel and cementum meet (CEJ)

A

Cervical line

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23
Q

Tooth tissue with 96% inorganic composition

A

Enamel

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24
Q

Tooth tissue with 70% inorganic composition

A

Dentin

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25
Q

Hard tooth tissue with the capability of repair and insulates pulp

A

Dentin

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26
Q

Main inorganic component of enamel and dentin. It is made up by salts of calcium and phosphates

A

Hydroxyapatite

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27
Q

Imaginary line that divides the body into right and left halves

A

Midline

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28
Q

The anterior teeth includes the:

A

Central incisors, Lateral incisors, and Canines

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29
Q

Posterior teeth includes:

A

Premolars and Molars

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30
Q

Surface closest to the midline

A

Mesial surface

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31
Q

The surface of a tooth farthest from the midline

A

Distal surface

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32
Q

Upper arch is called

A

Maxillary arch

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33
Q

Lower arch is called

A

Mandibular arch

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34
Q

The lower teeth are set in the

A

Mandible

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35
Q

The upper teeth are set in the

A

Maxilla (Maxillary bone)

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36
Q

Area of a tooth adjoining a tooth (M,D)

A

Proximal area

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37
Q

Types of teeth:

A

Incisors, Canines, Premolars, Molars

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38
Q

Incisors are used for

A

Biting and cutting food

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39
Q

Canines are used for

A

Cutting and tearing food

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40
Q

Premolars are used for

A

Grasping, tearing, and pulverizing food

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41
Q

Molars are used for

A

Chewing and grinding up food

42
Q

The act of chewing or grinding

A

Mastication

43
Q

The act of crushing into small pieces

A

Communition

44
Q

Functions of teeth includes:

A

Protecting the oral cavity, aiding the digestive system, functioning in communication, esthetics

45
Q

Parts of a tooth

A

Crown and Root

46
Q

Crown is covered with ____?

A

Enamel

47
Q

Root is covered with ____?

A

Cementum

48
Q

CEJ is also called the _____

A

Cervical line

49
Q

Neck of the tooth, where the crown and root meet

A

Cervix of tooth

50
Q

Portion of the tooth that is covered with enamel. From Occlusal surface to CEJ ; always the same

A

Anatomic crown

51
Q

The portion of the tooth that is visible in the oral cavity; above the gingiva

A

Clinical crown

52
Q

Portion of the tooth covered with cementum; always the same ; CEJ to Apex

A

Anatomical root

53
Q

Part of the tooth embedded in the gingiva and socket

A

Clinical root

54
Q

Root length divided by crown length

A

Root to crown ratio

55
Q

Movement of a tooth through the surrounding tissues into the oral cavity

A

Eruption

56
Q

Is the tooth of the tooth fully formed at eruption?

A

No

57
Q

Roots can be:
a)Single
B)Bifurcated
C)Trifurcated
D)All

A

Single, Bifurcated, Trifurcated

58
Q

Roots divided into two segments are:

A

Bifurcation (Bifurcated roots)

59
Q

The area between the roots of multicoated teeth

A

Furcal region

60
Q

The terminal end of a root

A

Apex

61
Q

The root is supported in the dental arch by…

A

The bony process of the jaw called Alveolar Bone or Alveolar Process of the maxilla and mandible

62
Q

Single rooted teeth includes:

A

Incisors, Canines, & Premolars EXCEPT permanent maxillary 1st premolars

63
Q

Bifurcated teeth
includes:

A

Maxillary 1st premolars and mandibular molars

64
Q

Trifurcated teeth
includes:

A

Maxillary molars

65
Q

Longest tooth in the mouth

A

Maxillary canine

66
Q

Longest root of any tooth

A

Maxillary Canines (Tooth #6, #11)

67
Q

Longest mandibular root

A

Mandibular canine

68
Q

Dividing point of a multi-rooted tooth; area where roots split

A

Furcation

69
Q

Concavity at the root trunk extending from Furcation towards CEJ

A

Furrow of the tooth

70
Q

The hole at the tip of the root where nerves and blood vessels enter the tooth

A

Apical foramen

71
Q

Portion of the maxillary and mandibular bones that support the teeth or roots of the teeth

A

Alveolar process

72
Q

Bony socket in which the tooth fits

A

Alveolus

73
Q

The color of the enamel varies with ____

A

Thickness and mineralization

74
Q

Microscopic canals that run from the pulp to the DEJ of the crown and CDJ of the root

A

Dentinal tubules

75
Q

Dentin’s chief inorganic component

A

Hydroxyapatite

76
Q

Dentin’s chief organic component

A

Collagen

77
Q

Dentinal tubules contains…

A

Fluid and protoplasmic extensions of the odontoblasts process

78
Q

Is dentin a living tissue?

A

Yes

79
Q

Is enamel a living tissue?

A

No

80
Q

Is the pulp a living tissue?

A

Yes

81
Q

Is the cementum a living tissue?

A

Cellular cementum - Yes
Acellular cementum - No

82
Q

Functions of dentin

A

Protect and insulate the pulp
Ability to repair
Transmit pain stimuli via dentinal fibers in the tubules

83
Q

Types of dentin

A

Primary, Secondary, Tertiary

84
Q

Dentin that forms before eruption. More mineralized than secondary dentin

A

Primary Dentin

85
Q

Dentin that forms after eruption and continues at a very slow rate throughout the life of the tooth. It forms internally to primary dentin

A

Secondary Dentin

86
Q

Dentin formed in response to local trauma, such as occlusal trauma or caries. Localized to the area of trauma

A

Reparative Dentin (Tertiary Dentin)

87
Q

Highly mineralized dentin; elderly, tubules empty of fluid and calcified

A

Sclerotic Dentin

88
Q

Empty dentinal tubules left behind after odontoblasts die. Provides a fast pathway for decay to get to pulp

A

Dead tracks definition

89
Q

Apical 1/3 and furcation area of the root; thickest past at the apex; forms continuously through life

A

Cellular cementum

90
Q

Located in cervical and middle 1/3 of the root ; Not cellular components ; Does not grow back

A

Acellular cementum

91
Q

Enamel overlaps cementum at what percentage?

A

60-65%

92
Q

Enamel and cementum meets edge to edge at what percentage?

A

30%

93
Q

Enamel and cementum do not meet at what percentage?

A

5-10%

94
Q

The pulp is made up of

A

Blood vessels and nerves that enter the pulp chamber through the apical foramen

95
Q

Soft tissue of the tooth that contains blood vessels and nerve

A

Pulp

96
Q

Functions of pulp

A

Formative, sensory, nutritive, defensive

97
Q

Tooth surface closest to the inner cheek (posterior teeth)

A

Buccal surface

98
Q

Tooth surface facing the lips (Anterior teeth)

A

Labial surface

99
Q

Tooth surface closest to the face. Facial surfaces closest to the lips are called labial surfaces, and facial surfaces closest to the inner cheek are called buccal surfaces. Therefore, the tern facial can be substituted for labial and buccal, and vice versa

A

Facial surface

100
Q

Chewing surface of posterior teeth

A

Occlusal surface

101
Q

Biting surface of anterior teeth

A

Incisal surface

Dental Anatomy (3 decks)

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