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Dental Anatomy > Ch1 > Flashcards

Ch1 Flashcards

1
Q

dentition

A

all teeth in mouth

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2
Q

When is a complete primary dentition present in children?

A

Ages 2mo-6

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3
Q

deciduous dentition

A

primary dentition

refers to the fact that all 20 teeth in children during ages 2-6 will eventually shed by age 12 or 13 and be replaced by permanent dentition

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4
Q

What are the three classes of teeth in each quadrant of primary dentition?

A

incisors (I), canine (C), and two molars (M)

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5
Q

deciduous dentitin

A

milk teeth

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6
Q

the tooth is made up of these 4 tissues

A

enamel, dentin, cementum, pulp

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7
Q

enamel

A

white, protective external surface layer of the anatomic crown

  • highly calcified or mineralized
  • hardest substance in the body
  • 95% calcium hydroxyapatite
  • 4% water and enamel matrix
  • develops from ectoderm
  • product of specialized epithelial cells (ameloblasts)
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8
Q

cementum

A

dull yellow external layer of the tooth root

  • *calcified & inorganic**
  • very thin (50-100 microm, about the size of a page)
  • 65% calcium hydroxyapatite (mineralized and calcified)
  • 35% organic matter (collagen fibers)
  • 12% water
  • as hard as bone but softer than enamel
  • develops from dental sac (mesoderm)
  • produced by cementoblasts
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9
Q

cementoenamel junction

A

seperates the enamel of the crown of the cementum of the anatomic root

  • also known as cervical line
  • surrounds the neck or cervix of the tooth
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10
Q

dentin

A

hard yellowish tissue underlying the enamel and cementum

  • makes up major bulk of the inner portion of each tooth crown and root
  • extens from pulp cavity in ceneter of tooth to outwad inner surface of the enael or cementum
  • 70% calcium hydroxyapatite
  • *- 18% organic matter (collagen fibers)**
  • *- 12% water**
  • develops from mesoderm
  • cells that form dentin are called odontoblasts;
  • calcified &inorgnic
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11
Q

dentinoenamel junction

A

inner surface of the enamel cap where enamel joins dentin

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12
Q

cementodentinal junction

A

inner surface of cementum wehre cementum joins dentin

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13
Q

pulp

A

soft tissue in the cavity or space in the center of the crown and root called pulp cavity
- not calcified or mineralized, soft

  • develops from mesoderm
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14
Q

pulp cavity is surrounded by

A

dentin

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15
Q

nerves and blood vessels enter the pulp through

A

apical foramina

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16
Q

pulp develops from

A

dental papilla (mesoderm)

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17
Q

what type of tissue is pulp

A

soft connective tissue

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18
Q

functions of dental pulp

A

Formative: dentin-producing cells (odontoblasts) produce dentin throughout the life of a tooth, this is calle secondary dentin

Sensory: nerve endings relay the sense of pain, but nerve fibers are unable to distinguish cause of pain

Nutritive: blood vessels transport nutrients from the bloodstream to cells of the pulp

Defensive or protective: pup responds to injury or decay by forming reparative dentin (by odontoblasts)

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19
Q

anatomic crown

A

part of the tooth normally covered by an enamel layer

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20
Q

anatomic root

A

part of the tooth covered by cementum/enamel

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21
Q

clinical crown

A

amount of tooth visible in the oral cavity

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22
Q

clinical root

A

amount of tooth that is not visible since it is covered with gingiva

23
Q

periodontium

A

supporting tissues of the teeth in the mouth, including surrounding alveolar bone, gingiva, periodontal ligament, and the outer, cementum layer of tooth roots

24
Q

alveolar bone

A

portion of the upper and lower bones that surround the roots of the teeth

25
Q

gingiva

A

part of th esoft tissue in the mouth that covers the alveolar bone of the jaws, and is the only part of the periodontium that is visible in a healthy mouth

26
Q

attached gingiva

A

part of the gingiva that is firmly bound to the underlying alveolar bone

27
Q

free gingiva (marginal gingiva)

A

collar of thin gingiva that surrounds each tooth and adapts to the tooth but provides access into the potential space between the free gingiva and the tooth which is called a gingival sulcus

28
Q

gingival margin

A

edge of the gingiva closest to the biting or chewing surfaces of the teeth

29
Q

How deep should a probe go into the sulcus?

A

1-3mm

30
Q

interdental (interproximal) papilla

A

part of the collar of free gingiva that extends between the teeth

31
Q

periodontal ligament

A

very thin ligament composed of many tissue fibers that attach the outer layer of the tooth root to the thin layer of dence alveolar bone surrounding each tooth

32
Q

succedaneous teeth

A

succeed primary dentition

33
Q

palmer notation system

A
34
Q

trait categories

A

set traits - primary vs permanent

arch traits - upper vs lower arch

class traits - I vs C vs PM vs M

type traits - 1st molar vs 2nd molar

35
Q

what are the 4 tissues of tooth

A

enamel, dentine, cementum, pulp

36
Q

junctions of tooth

A

cementoenamel junction

dentinoenamel junction

cementodentinal junction

37
Q

CEJ

A

cementoenamel juntion

38
Q

What is the inner surface of the enamel cap called

(visible in cross section or in badly worn teeth)

A
39
Q

What is the inner surface of the enamel cap called

(visible in cross section or in badly worn teeth)

A
40
Q
A

lingual surface

  • surface of maxillary and mandibular teeth nearest toung
41
Q
A

palatal surface

  • surface of maxillary teeth nearest the palate
42
Q

cusp

A

point, peak on the chewing surface of premolar or molar tooth

43
Q

cingulum

A

enlargement or bulge on the cervical third of the lingual surface of the crown of anterior teeth

44
Q

what are the 5 ridges

A

labial

buccal

cervical

marginal

triangular

45
Q

labial ridge

A

runs cervico-incisally in approximately the center of the labial surface of the canines

46
Q

buccal ridge

A

runs cervico-occlusally in approx the center of buccal surface of the buccal surface of premolars

47
Q

cervical ridge

A

runs mesiodistally on the cervical one-third of the buccal surface of the crown. found in all deciduous teeth but only on the permanent molars

48
Q

marginal ridge

A

on incisor & canine located on the mesial &distal border of the lingual surface

49
Q

triangular ridge

A
50
Q

how many triangular ridges do maxillary molers have?

A
51
Q

oblique ridge

A

transverse ridge

52
Q

developental groove

A

bigger, sharply defined

53
Q

supplemental groove

A

small irregularly placed grooves not at the junction of lobes or major portions of teeth

54
Q

fossa

A

a depression or hollow found on the lingual surfaces of some anterior teeth & on the occlusal surfaces of posterior teeth

Dental Anatomy (1 decks)

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