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Ortho > Growth and Development > Flashcards

Growth and Development Flashcards

1
Q

Types of ossification

A

Endochondral

Intramembranous

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2
Q

Ossification that requires a cartilage precursor.

A

Endochondral

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3
Q

Ossification where bone is directly deposited into connective tissue matrix.

A

Intramembranous

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4
Q

Parts of the mandible derived from intramembranous ossification.

A

Body except the symphysis

Ramus below the mandibular foramen

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5
Q

Cranial base and long bones are what kind of ossification?

A

Endochondral

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6
Q

Maxilla and flat bones of the skull are what kind of ossification?

A

Intramembranous

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7
Q

The cartilage nasal septum is continuous with the cartilage cranial base in what age group?

A

Prenatal

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8
Q

Components of the cartilage nasal capsule.

A 
Ethmoid
Inferior concha
Maxilla (nasal crest)
Lacrimal
Palatine
Vomer
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9
Q

Has a perpendicular and cribriform plate.

A

Ethmoid bone

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10
Q

Separates the brain from the nasal cavity.

A

Cribriform plate

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11
Q

Contains olfactory nerve fibers

A

Cribriform plate

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12
Q

At what age does the ethmoid bone start to ossify?

A

1 year old

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13
Q

At what age does ethmoid STOP ossifying?

A

3 years old

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14
Q

At what age does perpendicular cranial plate unite with Vomer?

A

7

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15
Q

The distance between the eyes is near adult dimension s by what age?

A

3

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16
Q

This stimulates bone deposition.

A

Sutures that separate bone

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17
Q

What is moved forward and downward when the cartilage nasal septum grows?

A

Maxilla

18
Q

What do these locations have in common?

Frontomaxillary Suture
Zygomatico-maxillary suture
Floor of the orbit
Posterior/Lateral zygomatic

A

Bone deposition sites in the maxilla

19
Q

The median palatal suture fuses at what age?

A

18

20
Q

You can use a palate expander up to what age?

A

18

21
Q

This part of the ramus resorbs as we grow, uncovering the crypts of 2nd and 3rd molars

A

Anterior

22
Q

Bone deposition occurs in this part of the mandible.

A

Posterior ramus and alveolar process

23
Q

Bone needs this to develop.

A

Blood supply, NOT muscle!

24
Q

When the ethmoid complex is complete, what happens at the facial sutures?

A

They stop depositing bone.

25
Q

Bone growth occurs at this part of the zygomatic.

A

Posterior and Lateral

26
Q

Site of bone deposition in the maxilla.

A

1) Transverse palatal suture
2) Tuberosity
3) Alveolar process

27
Q

T/F: Soft tissue grows, and bone accomodates.

A

True

28
Q

Internal capsular matrices.

A

Cerebral and Facial

29
Q

Eternal functional matrices

A

Muscle

Periosteal

30
Q

Covers the articulating surfaces in joints.

A

Synovial membrane

31
Q

A dense membrane made of fibrous CT that closely wraps all bone except that of articulating surfaces.

A

Periosteum

32
Q

The periosteal matrix is what kind of growth?

A

Transformative

33
Q

The capsular matrix is what kind of growth?

A

Translative

34
Q

What do animal studies of cellular activity in the condyle show for class II and III malocclusions?

A

Increased cellular activity

35
Q

Pubertal growth period for females

A

9-12 y.o

36
Q

Pubertal growth period for males.

A

11-14

37
Q

Indications for a functional appliance

A

Class II or III malocclusion

38
Q

Recommended tx time for a functional appliance.

A

Circumpubertal growth

39
Q

Purpose of the Herst appliance.

A

Pulls the mandible forward in people with Class II malocclusion.

40
Q

At what age does growth via bone deposition at sutures from cartilage and soft tissue expansion stop?

A

7 years post-natal

41
Q

This form of bone growth dominates 7 years post-natal.

A

Surface apposition

42
Q

Enlow’s “V Principle”

A

Surfaces that face the direction of growth get new deposits of bone.

Surfaces that face away from the direction of growth are usually resorptive.

Ortho (13 decks)

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