Theory of Craniofacial Growth Flashcards
1
Q
what is the equilibrium theory Proffitt
A
- balance of forces keep the teeth and jaws in their position
- duration of force more important than magnitude
- bone and soft tissue accomodate each other
2
Q
what are the defects of mouth breathing
A
- anterior open bite
- maxillary incisor protrusion
- mandibular incisor protrusion
- narrowing of maxilla
- mandibula retrusion
3
Q
what happens at growth centers and where are they located
A
- epiphysis of long bones
- responsible for growth of long bones
- cells are layered in precise manner
- transplanted cell will continue to grow
- does not respond to tension or pressure
4
Q
are growth centers in cranio facial complex
A
none except cranial base
5
Q
describe growth sites and their location
A
- mandibular condyles, sutures, tuberosity
- immature cartilagenous cells not layered
- stop functioning if transplanted
- growth sites are sensitive to mechanical stimulations such as tension and pressure
6
Q
is more bone formed in growth centers or growth sites
A
growth centers
7
Q
growth sites respond to _____
A
mechanical stimulation
8
Q
growth centers are _____ programmed and less affected by ______
A
genetically; environment
9
Q
what happens when you pull on a growth site
A
form bone
10
Q
what happens when you push on a growth site
A
resorb bone
