Mandible And Maxilla Formation

Question 1

Madible:

Extends from

Associated with seperation of

Answer 1

Ear almost to mid line

Lingual from inferior alveolar nerve

Question 2

Mandible:

Condensation of…

Answer 2

Mesenchyme and bone formation.

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

Question 3

Mandible:

Ossification-

Moving…
Creates a trough…

Answer 3

Anterior just short of mid line

Moving posterior toward Mandibular _____

Question 4

Mandible:

Ossification continues…

Provides for:
1.
2.

Answer 4

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

Question 5

Mandibular Ramus:

Ossification moves ____ from _____ cartilage

Answer 5

Away (Laterally)

Meckels

Question 6

Mandibular Ramus:

Initiates at the…

Answer 6

Area which will become the lingula

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

*body=mental foramen
ramus=mand foramen

Question 7

Meckels cartilage:

The fate of cartilage– (3 pts)

Answer 7

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

*purpose: takes up space so things stay seperate

Question 8

In utero Mandibular growth:

Influenced by… (3 pts)

Answer 8

2ndary (growth) cartilages

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

Question 9

Condylar cartilage:

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

Answer 9

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

Question 10

Condylar cartilage:

Converted through…

Provides…

Answer 10

Endochondral ossification

Through 2nd decade a mechanism for further growth.

Question 11

Coronoid cartilage:

Appears at…

Provides…

Answer 11

4 months in utero

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

Question 12

Mandible:

________ cartilage

At ___ weeks

Answer 12

Meckels
6 weeks

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

Question 13

Symphyseal cartilage:

Positioned…

Provides…

Summary-

Answer 13

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

Alveolar process at mid line

Develops independent of meckels cartilage under 2ndary cartilage influences

Question 14

Development of the Maxilla:

Origin-

Answer 14

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

Question 15

Development of the Maxilla:

Ossification (3 pts)

Answer 15

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

Question 16

Secondary cartilages: (Main cartilage of the maxilla)

Zygomatic-

Body of maxilla-

Maxillary sinus-

Answer 16

Contributes to the zygomatic arch

Relatively small (lack of sinus)

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

Question 17

Commonalities in Jaw Development:

4 pts

Answer 17

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