Oral Anatomy > Introduction > Flashcards

Introduction Flashcards

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1
Q

It is the study of the teeth in the human dentitions, as well as the way in which the teeth relate in shape, form, structure, color, and function to the other teeth in the same dental arch and opposing arch

A

Oral Anatomy

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2
Q

Two divisions of Oral Cavity

A
  1. Oral Vestibule
  2. Oral Cavity Proper
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3
Q

Two dental arch

A
  1. Maxillary
  2. Mandibular
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4
Q

It is bounded by lips, cheeks, labial (anterior teeth) / buccal (posterior teeth) surfaces and upper teeth

A

Oral Vestibule (Vestibulum Oris)

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5
Q

Superiorly: Hard and Soft palate
Inferiorly : Sublingual sulcus of the tongue
Anterior and Laterally : lingual/ palatal surface of the tooth

A

Oral Cavity Proper (Cavum Oris Proprium)

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6
Q

Structures of the mouth

A
  1. Lips
  2. Oral Mucosa
  3. Gingiva
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7
Q

It is formed by orbicularis oris and it produces anterior seal

A

Lips

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8
Q

Two types of oral mucosa

A
  1. Keratinized
  2. Non-keratinized
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9
Q

This can withstand loads of trauma and abrasion

A

Keratinized

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10
Q

This can’t withstand loads of trauma and abrasion

A

Non-keratinized

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11
Q

Types of gingiva

A
  1. Free gingiva/Marginal gingiva
  2. Attached gingiva
  3. Interdental papilla
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12
Q

Gingiva that is not directly attached with the surface of the tooth

A

Free gingiva (Marginal gingiva)

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13
Q

Gingiva that is firmly attachec to the bone

A

Attached gingiva

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14
Q

Gingiva in between each tooth (triangular)

A

Interdental papilla

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15
Q

Types of tooth

A
  1. incisors (central and lateral)
  2. canines (cuspids)
  3. premolars (not included in primary)
  4. molars
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16
Q

Responsible for mastications, phonation, and support to structures

A

Teeth

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17
Q

It is the lower jaw

A

Mandibular

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18
Q

It is the upper jaw

A

Maxillary

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19
Q

This indicates a first dentition

A

Primary

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20
Q

It is a permanent dentition

A

Permanent

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21
Q

This indicates that the first dentition in not permanent

A

Deciduous

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22
Q

It is a successor dentition; permanent teeth that replaces a deciduous teeth; central to 2nd premolar; (not all permanent teeth are _______)

A

Succedaneous

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23
Q

Not succedaneous teeth

A

1st, 2nd, 3rd molar

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24
Q

3 methods of tooth numbering system

A
  1. Universal (ADA or Military & International)
  2. Palmer’s Notation
  3. Two-Digit System (Fédération Dentaire
    Internationale system)
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25
It is used in diagnosis and oral screening; Facilitate simple and fast oral examination
Tooth numbering system
26
The universal system of notation for the primary dentition uses '___________' for each of the primary teeth.
Uppercase letters
27
The ADA in 1968 officially recommended the "_________" numbering system.
Universal (continuous)
28
The universal system of notation for the permanent dentition uses '________' for each of the permanent teeth.
Numbers
29
3 hard tissue
1. Enamel 2. Cementum 3. Dentin
30
Soft tissue
Pulp
31
It is covered by the enamel
Crown
32
It is covered by cementum
Root
33
Division of crown and root
Cervical line/CEJ (cementoenamel junctions)
34
Terminal end of the root
Apex
35
Surrounds pulp tissue
Dentin
36
Type of root of the anterior teeth
Monorooted
37
Type of root of the posterior teeth
Birooted/Trirooted
38
• 2.5 mm thickness • (Cusp and incisal edges) • Low tensile strength (brittle)
Enamel
39
Components of enamel
Calcium hydroxyapatite - Phosphate - Fluoride - Lipids and proteins - Water (2%) by weight, ( 5-10 %) by volume
40
• Yellowish tubular structures • Bone- like with collagen • Has greater tensile and compressive strength
Dentin
41
Components of dentin
Calcium, Phosphorus, Carbonate, Sodium, Magnesium, Water ( 20%)
42
• Connective tissue with 3 components: • blood vessels, nerves, odontoblast (on the periphery) • Other components: collagen and protein
Pulp
43
• Slowly formed • Softer than dentin (Pale yellow) • High permeability than dentin • CDJ (cementodentinal junction)
Cementum
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- low mineral content
CDJ (cementodentinal junction)
45
It is in between of enamel amd dentin (found in crown only)
DEJ (dentinoenamel junction)
46
Surfaces of tooth
1. Facial surfaces (labial, buccal) 2. Palatal surfaces 3. Lingual surfaces 4. Occlusal surface 5. Incisal surfaces 6. Proximal surfaces (mesial, distal) 7. Contact area
47
Surface that faces towards the lips
Labial surfaces
48
Surface that faces the cheeks
Buccal surfaces
49
Surfsce that comes into contact of the opposing tooth (biting/occlusion)
Occlusal surface
50
Contact between the adjacent tooth
Proximal surfaces
51
Proximal surface that faces towards the midline
Mesial
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Proximal surface that faces away the midline
Distal
53
area of the mesial or distal surface of a tooth that touches its adjacent or neighbor in the arch
Contact area
54
TOOTH LANDMARKS
1. Cusp 2. Tubercle 3. Cingulum 4. Ridge 5. Lobe 6. Mamelon 7. Fossa 8. Sulcus 9. Groove 10. Pit
55
It is an **elevation or mound on the crown** portion of a tooth making up a divisional part of the occlusal surface
Cusp
56
smaller elevation on some portion of the crown produced by an extra formation of enamel
Tubercle
57
It is the **lingual lobe** of an anterior tooth. It makes up the **bulk of the cervical third of the lingual surface**
Cingulum
58
It is any **linear elevation on the surface of a tooth** and is named according to its location
Ridge
59
Types of ridges
• Marginal Ridge • Triangular Ridge • Transverse Ridge • Oblique Ridge
60
**rounded borders of the enamel** that form the mesial and distal margins of the occlusal surfaces of premolars and molars, as well as the mesial and distal margins of the lingual surfaces of the incisors and canines
Marginal ridges
61
**descend from the tips of the cusps of molars and premolars** toward the **central part of the occlusal surfaces**
Triangular ridges
62
It is is the **union of two triangular ridges crossing transversely** the surface of aposterior tooth
Transverse ridge
63
It is a **ridge crossing obliquely the occlusal surfaces** of maxillary molars and formed by the union of the triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesiolingual cusp
Oblique ridge
64
It is one of the **primary sections of formation** in the development of the crown
Lobe
65
It is any **one of the three rounded protuberances** found on the incisal ridges of newly erupted incisor teeth
Mamelon
66
It is an **irregular depression** or concavity
Fossa
67
3 types of fossa
• Lingual Fossa • Central fossa • Triangular fossa
68
It is a **long depression or valley in the surface** of a tooth between ridges and cusps, the inclines of which meet at an angle
Sulcus
69
Deepest part of the sulcus
Groove
70
3 types of groove
• Developmental groove • Supplemental groove • Buccal and Lingual groove
71
It is a **shallow groove** or line between the **primary parts of the crown or root**
Developmental groove
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It is **less distinct**, is also a **shallow linear depression** on the surface of a tooth
Supplemental groove
73
Central pit (small pinpoint depression junction)
Pit
74
It is **formed by the junction of two surfaces** and derives it's name from the combination of the two surfaces that join
Line angle
75
It is **formed by the junction of three surfaces**
Point Angle
76
Important indicators of dental age:
- Calcification - Root formation - Eruption of the teeth
77
How many teeth are there in Deciduous / Primary / Temporary Dentition
20
78
How many teeth are there in permanent dentition
32
Oral Anatomy
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