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Pediatric > Growth Dev 1 > Flashcards

Growth Dev 1 Flashcards

1
Q

cell origin of endochondral formation? intramembranous?

A

chondroblasts osteoblasts

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2
Q

Bones of skull formed by intramembranous?

A

mandible, maxilla

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3
Q

Predominant mechanism of osteogenesis of skull?

A

intramembranous

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4
Q

Intramembranous ossification occurs in areas of tension or pressure?

A

tension

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5
Q

Bone deposition by periosteum, periodontal ligament, sutures occur by which mechanism?

A

intramembranous

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6
Q

Endochondral bone formation for which bones?

A

long bones Condyle of mandible cranial base

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7
Q

Endochondral formation in areas of tension or pressure?

A

pressure

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8
Q

Apposition vs resorption?

A

apposition is adding resorption is taking away duh

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9
Q

Two mecahnisms by which bone “moves”

A

Drift - deposition on one surface and removal on opposite surface Displacement - 2+ bones growing, which makes them get carried “apart”

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10
Q

Relocation is when…

A

point in bone doesnt move itself, but bone around it getting resorbed/deposited, so area relocates.

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11
Q

Mandible growing downards/forwards from condyle growing upwards/backwards is an example of

A

displacement

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12
Q

Nasomaxillary complex displaced how re: cranium

A

downwards and forwards

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13
Q

Cranial vault grows how?

A

intramembranous Remodeling occurs on inner/outer surfaces to allow expanding neurocranium dev

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14
Q

Cranial vault shape can be altered due to.. Open through…

A

fontanels first year of life

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15
Q

Synchondroses is a…

A

double sided growth plate

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16
Q

Most synchondroses fuse when? Exception?

A

at birth spheno-occipital - 18 yo

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17
Q

Palatal vault formed how? Movement?

A

endochondral, bone removed from floor of nose and added to roof of mouth, moving downward

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18
Q

Directions of growth of… Zygomatic process Sinus Max tuberosity Max Arch Premaxilla Palatine Process Nasal Region Orbital Region

A

P,L P,I,L I,P I,L A,S,L

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19
Q

Predominant direction of growth of Maxilla? Displacement?

A

Posteriorly; downward and forward

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20
Q

Condyle formed through what process? direction? Ramus? Body? Chin?

A

Endochondral, upward and backward Intramembranous, lengthened vertically, with resorption on anterior border and deposition on posterior Lengthens posteriorly, resorption on lingual surface, deposition on buccal Enlarged mental protuberance bc resorption superior to it.

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21
Q

Alveolar bone growth through waht process? PDL acts as… No teeth = ?

A

intramembranous PDL acts as sutures No teeth = no bone

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22
Q

Modern theory of facial growth: genetic component determines… influenced by…

A

overall growth potential external factors

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23
Q

Body growth patterns: conception to birth birth - 6yo 7-9 12-16 17

A

period of most rapid growth gradual reduction of growth Childhood growth spurt pubertal growth spurt Reduction growth rate

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24
Q

Craniofacial area has growth pattern similar to…

A

general body

25
Q

Lymphoid tissue growth, adult vs child?

A

very rapid, then atrophies. More in child than adult.

26
Q

Neural growth most rapid when?

A

1st 6 yars

27
Q

Scammon’s curve is used to show?

A

growth of different areas

28
Q

Wetzel Grid used for?

A

Percentile growth of male/female

29
Q

At birth, jaw is… Growth makes it do what?

A

retrognathic. growth makes it decrease

30
Q

Eruption of primary teeth?

Permanent?

A

picture

31
Q

All primary teeth begin calcification when?

A

Before birth, 4 fetal mo

32
Q

Sequence of calcification corresponds to what?

A

Anterior-posterior sequence in mouth

33
Q

Calcification of primary teeth completed before?

A

1 year of age

34
Q

Only permanent tooth to begin calcification before birth?

A

permanent 1M

35
Q

What gender and race erupt permanent teeth first?

A

Female, AA or hispanic

36
Q

What 4 environental things delay eruption?

A

Low birth weight, prematurity, early loss/retention of primary tooth

37
Q

Loss of primary tooth before age 5…

Loss after age 8…

A

Delays

Accelerates

38
Q

Loss primary tooth prior to crown completion of successor

after crown completion

A

Delays

Accelerates

39
Q

Baume type 1 has…

A

interdental space between anterior teeth

40
Q

Baume Type 2 has…

How much narrower?

Due to what?

A

No interdental spacing between anteriors

1.5mm narrower intercanine width

Large primary teeth/Narrower arch

41
Q

Where are primate spaces?

A

Maxilla - lateral incisors and canines

Mandible - between canines and primary 1M

42
Q

Straight terminal plane how many % cases?

Reason it happens?

A

76%

Maxillary primary 2M is shorter than Mand

43
Q

Straight terminal plane most often results in?

A

Class 1

44
Q

Mesial step is when what relationship between 2M’s

A

Distal surface of mandibular is anterior ot distal surface of max

45
Q

Mesial step results in what most often?

A

Class 1

46
Q

Distal step happens when what relationship between 2M’s

A

Distal of max 2M is anterior to distal of mand 2M “ledge”

47
Q

Distal step progresses to what 40% of the time

A

class II

48
Q

General order of mixed dentition (3 phases)

A

Eruption of first permanent molars

Replacement of incisors

Replacement of primary molars with premolars and replacement of canines

49
Q

How does straight terminal plane (Baume type 1) erupt into class 1?

A

Early mesial drift closes mand primate space –> permanent 1M mandibular will be anterior to max.

50
Q

What is leeway space?

A

Difference between sum of primary canine and molars and permanent canine and premolars. Permanent are smaller than primaries.

51
Q

What is E space?

A

Difference between primary 2nd molar andpermanent 2nd PM

52
Q

Average leeway space in max and mand?

A

Max: 0.9mm, Mand : 1.7mm

53
Q

How does straight terminal plane (Baume II) erupt into class 1?

A

Late mesial shift utilizing leeway space

54
Q

For baume I and II, mesial step will be class 1 when?

A

at eruption

55
Q

Permanent incisors erupt in what direction to primary? What moves them into position?

A

Lingually, tongue

56
Q

How much space needed for larger incisors in max? mand?

A

7, 5

57
Q

Ugly duckling stage is when? (2)

A

Permanent max incisors erupt labially with labial inclination, diastema

58
Q

Ugly duckling diastema usually closes when?

A

Decreases with lat incisors, elimintaed with canines

59
Q

Dental Age 6

8

9

11

12

A

6: eruption of 1M’s, mand Centrals
8: max laterals
9: root stuff
11: mand canines, 1PMs
12: 2M’s, 2PMs, and max canine

Pediatric (5 decks)

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