Growth and Development

Question 1

Types of ossification

Answer 1

Endochondral

Intramembranous

Question 2

Ossification that requires a cartilage precursor.

Answer 2

Endochondral

Question 3

Ossification where bone is directly deposited into connective tissue matrix.

Answer 3

Intramembranous

Question 4

Parts of the mandible derived from intramembranous ossification.

Answer 4

Body except the symphysis

Ramus below the mandibular foramen

Question 5

Cranial base and long bones are what kind of ossification?

Answer 5

Endochondral

Question 6

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

Answer 6

Intramembranous

Question 7

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

Answer 7

Prenatal

Question 8

Components of the cartilage nasal capsule.

Answer 8

Ethmoid
Inferior concha
Maxilla (nasal crest)
Lacrimal
Palatine
Vomer

Question 9

Has a perpendicular and cribriform plate.

Answer 9

Ethmoid bone

Question 10

Separates the brain from the nasal cavity.

Answer 10

Cribriform plate

Question 11

Contains olfactory nerve fibers

Answer 11

Cribriform plate

Question 12

At what age does the ethmoid bone start to ossify?

Answer 12

1 year old

Question 13

At what age does ethmoid STOP ossifying?

Answer 13

3 years old

Question 14

At what age does perpendicular cranial plate unite with Vomer?

Answer 14

7

Question 15

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

Answer 15

3

Question 16

This stimulates bone deposition.

Answer 16

Sutures that separate bone

Question 17

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

Answer 17

Maxilla

Question 18

What do these locations have in common?

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

Answer 18

Bone deposition sites in the maxilla

Question 19

The median palatal suture fuses at what age?

Answer 19

18

Question 20

You can use a palate expander up to what age?

Answer 20

18

Question 21

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

Answer 21

Anterior

Question 22

Bone deposition occurs in this part of the mandible.

Answer 22

Posterior ramus and alveolar process

Question 23

Bone needs this to develop.

Answer 23

Blood supply, NOT muscle!

Question 24

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

Answer 24

They stop depositing bone.

Question 25

Bone growth occurs at this part of the zygomatic.

Answer 25

Posterior and Lateral

Question 26

Site of bone deposition in the maxilla.

Answer 26

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

Question 27

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

Answer 27

True

Question 28

Internal capsular matrices.

Answer 28

Cerebral and Facial

Question 29

Eternal functional matrices

Answer 29

Muscle | Periosteal

Question 30

Covers the articulating surfaces in joints.

Answer 30

Synovial membrane

Question 31

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

Answer 31

Periosteum

Question 32

The periosteal matrix is what kind of growth?

Answer 32

Transformative

Question 33

The capsular matrix is what kind of growth?

Answer 33

Translative

Question 34

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

Answer 34

Increased cellular activity

Question 35

Pubertal growth period for females

Answer 35

9-12 y.o

Question 36

Pubertal growth period for males.

Answer 36

11-14

Question 37

Indications for a functional appliance

Answer 37

Class II or III malocclusion

Question 38

Recommended tx time for a functional appliance.

Answer 38

Circumpubertal growth

Question 39

Purpose of the Herst appliance.

Answer 39

Pulls the mandible forward in people with Class II malocclusion.

Question 40

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

Answer 40

7 years post-natal

Question 41

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

Answer 41

Surface apposition

Question 42

Enlow's "V Principle"

Answer 42

Surfaces that face the direction of growth get new deposits of bone. Surfaces that face away from the direction of growth are usually resorptive.