Mandible And Maxilla Formation Flashcards Preview

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Flashcards in Mandible And Maxilla Formation Deck (17)
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1

Madible:

Extends from

Associated with seperation of

Ear almost to mid line

Lingual from inferior alveolar nerve

2

Mandible:

Condensation of...

Mesenchyme and bone formation.

*starts where inferior alveolar nerve bifurcates (mental foramen; incisive and mental nerves)
*bones form around nerves

3

Mandible:

Ossification-

Moving...
Creates a trough...

Anterior just short of mid line

Moving posterior toward Mandibular _____

4

Mandible:

Ossification continues...

Provides for:
1.
2.

On both sides and are joined at the midline shortly after birth.

1. Canal to house IA and incisive nerves.
2. Individual compartments to house tooth germs

5

Mandibular Ramus:

Ossification moves ____ from _____ cartilage

Away (Laterally)
Meckels

6

Mandibular Ramus:

Initiates at the...

Area which will become the lingula

*point where IA nerve enters the mandible (mand foramen)

*body=mental foramen
ramus=mand foramen

7

Meckels cartilage:

The fate of cartilage-- (3 pts)

1. Malleous of the middle ear
2. Sphenomandibular ligament
3. Rest of cartilage is completely resorbed

*purpose: takes up space so things stay seperate

8

In utero Mandibular growth:

Influenced by... (3 pts)

2ndary (growth) cartilages

1. Condylar cartilage
2. Coronoid cartilage
3. Symphyseal cartilage

9

Condylar cartilage:

Appears at ____ weeks in ____, occupies most of the developing _____.

12 weeks in utero, occupies most of the developing ramus.

10

Condylar cartilage:

Converted through...

Provides...

Endochondral ossification

Through 2nd decade a mechanism for further growth.

11

Coronoid cartilage:

Appears at...

Provides...

4 months in utero

For the anterior border and the superior most aspects of the coronoid process

12

Mandible:

________ cartilage

At ___ weeks

Meckels
6 weeks

*nothing to do with the bone in the mandible, doesn't actually form the mandible.

13

Symphyseal cartilage:

Positioned...

Provides...

Summary-

B/w the 2 medial aspects of meckels cartilage (2)

Alveolar process at mid line

Develops independent of meckels cartilage under 2ndary cartilage influences

14

Development of the Maxilla:

Origin-

Where anterior superior nerve is given off from infraorbital nerve. (Around infraorbital for amen)

15

Development of the Maxilla:

Ossification (3 pts)

1. Moves posterior from foramen to zygomatic
2. Moves anterior and inferior toward future incisors
3. Trough formation as in mandible for tooth crypts

16

Secondary cartilages: (Main cartilage of the maxilla)

Zygomatic-

Body of maxilla-

Maxillary sinus-

Contributes to the zygomatic arch

Relatively small (lack of sinus)

Rudimentary structure until well after birth
*doesnt develop until 2 yrs old

17

Commonalities in Jaw Development:
(4 pts)

1. Development is primarily intramembraneous
2. Ossification related to neural elements
3. Develop alveolar elements for future dentitions
4. Require secondary cartilage to develop