5 - Mandibular Growth Flashcards
You get mandibular processes from which branchial arch?
1st arch
What kind of cartilage is Meckel’s cartilage?
Hyaline cartilage
In what arch is meckel’s/hyaline cartilage formed?
1st arch
The mandibular alveolar process shows significant _______ development
Vertical
(T/F) The mandibular alveolar process is NOT tied to dental eruption
False
Where does the mandibular alveolar process take place?
Above mandibular canal
Mandibular growth has what 3 kinds of growths?
- Cartilage growth
- Alveolar growth
- Bone apposition and resorption
How is mandibular growth remodeled?
By bone apposition and resorption
describe the mandibular alveolar process
tied to tooth eruption
shows significant vertical development
above the mandibular canal
Permanent teeth do what to primary teeth after eruption?
Resorb primary teeth
How was the mandibular growth pattern confirmed?
Implant technique
Growth in length of the mandible essentially occurs at the
Condyles
describe the mandibular growth pattern (Bjork)
confirmed by implant techinque, vertical growth by condyles
Is there a strong or weak correlation of the size of the mandible at 12 and at the final size?
Weak correlation because there is too much variation
Elongation of the mandible occurs how?
Apposition and displacement
In the mandible, apposition does what?
Adds bone to the posterior part of the mandible
In the mandible, displacement does what?
Removes bone from the anterior part of the mandible
In the mandible, is the A/D ratio 1?
No, >1
Why is the A/D ratio greater than >1?
More apposition than displacement
The mandible “catches up” to the maxilla as it starts as
Retrognathic at birth
What growth patterns does the ramus of the mandible have?
Vertical growth
Transverse growth
In what principle does the mandible grow?
V of enlow
Vertical growth of the mandible is the result of the vertical displacement of the
Maxilla
Vertical growth of the mandible and the vertical displacement of the maxilla must occur
At the same time
Timed with tooth eruption
the vertical and transverse growth of the ramus occurs in what way?
v of enlow
What is the regional field of growth in the mandible?
Condyles
Mandibular condyles are growth sites or centers?
Growth sites
Tension on the condyles cause what?
Increased growth
Compression on the condyles cause what?
Decreased growth
Is endochondral growth present in the condyles?
Yes
Where is endochondral growth in the condyles?
Only at the articular surface of the condyle
Why is endochondral growth only at the articular surface of the condyle?
Because of compressive load
