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ANAT1119 - Orofacial Anatomy I > CH5 - Development, Form, and Eruption > Flashcards

CH5 - Development, Form, and Eruption Flashcards

Week 8

1
Q

Tooth buds/germs grow during

A

The sixth week of fetal life in alveolar bone

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2
Q

Buds/germs are small clumps of

A

Cells that form the tooth tissues

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3
Q

What forms first then second?

A

Dentin and enamel form first, cementum later

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4
Q

What continues to form through lifetime?

A

Secondary dentin

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5
Q

Hardening of tooth tissues by the deposition of mineral salts within these tissues is called?

A

Calcification

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6
Q

Primary teeth calcify by

A

About 4th to 5th month of fetal life

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7
Q

Permanent teeth begin to calcify by

A

Age 3 or 4 (age when deciduous teeth are fully formed)

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8
Q

Growth centers where each tooth begins to develop

A

Developmental lobes

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9
Q

Where does the developmental lobes centers grow from?

A

Tooth germ

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10
Q

Developmental lobes grow until they

A

“fuse” or “coalescence”

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11
Q

Point of fusion leaves a

A

“Developmental groove”

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12
Q

Number of lobes necessary depends on

A

Type of tooth

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13
Q

How many lobes do incisors have (which kind)?

A
  • 3 facial lobes
  • 1 lingual lobe
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14
Q

The 3 labial developmental lobes are called the

A
  • Mesiofacial lobes
  • Centrofacial lobes
  • Distofacial lobes
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15
Q

The lingual lobe makes up the

A

Cingulum

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16
Q

Mamelons are evident after the eruption of

A

Incisor teeth

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17
Q

Mamelons are the ___ ridges of the 3 labial developmental lobes

A

Incisal ridges

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18
Q

Mamelons are separated by

A

Developmental grooves

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19
Q

When are mamelons only present?

A

When incisors first erupt

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20
Q

How many lobes do max & mand premolars have?

A
  • 3 facial lobes
  • 1 lingual lobe
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21
Q

How many cusps do mand premolars have?

A

2 or 3 cusps

22
Q

How many lobes do molars have?

A
  • 2 facial lobes
  • 2 lingual lobes
23
Q

First max molars may have a 5th lobe called

A

Cusp of Carabelli

24
Q

Teeth generally appear in

A

Pairs

25
Q

Permanent teeth erupt slightly earlier in

A

Girls

26
Q

Primary Mand central incisors erupt

A

6-8 months

27
Q

Primary Max central incisors erupt

A

8-10 months (2 months after mand)

28
Q

Primary Max lateral incisors erupt

A

1 year old

29
Q

Primary Mand lateral incisors erupt

A

1-2 months after max

30
Q

Primary Mand & Max first molars erupt

A

16 months (1 year 4 months)

31
Q

Primary Canines erupt

A

16-20 months

32
Q

Primary Second molars

A

2 years old

33
Q

All primary teeth are erupted by

A

2 and half years

34
Q

Process by which the roots of a deciduous tooth are resorbed

A

Exfoliation

35
Q

As permanent tooth erupts ___ destroy deciduous root

A

Osteoclasts

36
Q

Permanent mand central incisors erupt

A

6-7 years old

37
Q

Permanent max central incisors erupt

A

7-8 years old

38
Q

Permanent mand canines erupt

A

9-10 years old

39
Q

Permanent max canines erupt

A

11-12 years old

40
Q

Permanent first premolars erupt

A

10-12 years old

41
Q

Permanent second premolars erupt

A

10-12 years old

42
Q

Permanent first molars erupt

A

6 years old

43
Q

Permanent second molars erupt

A

11-13 years old

44
Q

Permanent third molars erupt

A

17+ years old

45
Q

The tendency of permanent molars to have an eruptive force toward the midline

A

Mesial drift

46
Q

Forms as teeth erupt and meet their antagonist in the opposite arch

A

Occlusal plane

47
Q

Occlusal plane is called the ___ unless it’s flat

A

Curve of Spee

48
Q

Period of primary dentition

A

Begins with the eruption of first deciduous tooth; Lasts as long as only deciduous teeth are present

49
Q

Period of mixed dentition

A

Begins when first permanent molar erupts; Last until the final deciduous tooth is exfoliated (only permanent teeth remain)

50
Q

Period of permanent dentition

A

Begins when the last primary tooth is lost; ends when the last permanent tooth is lost

ANAT1119 - Orofacial Anatomy I (8 decks)

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