Theories of craniofacial growth Flashcards
1
Q
Equilibrium Theory Proffitt (2)
A
- Balance of forces keep the teeth and jaws in their position
- Duration of force more important than magnitude
2
Q
Dental Effects of Mouth breathing
5
A
- Anterior open bite
- Maxillary incisor protrusion
- Mandibular incisor retrusion
- Narrowing of the maxilla
- Mandibular retrusion?
3
Q
Growth centers • --- of long bones • Responsible for growth of long bones • Cells are layered in a precise manner • Transplanted cell will continue to grow (chemical mediators?) • Do not respond to tension or pressure
A
Epiphysis
4
Q
Growth centers
• Responsible for
A
growth of long bones
5
Q
Growth centers
cell organization
A
• Cells are layered in a precise manner
6
Q
Growth centers
transplanted cell
A
• Transplanted cell will continue to grow (chemical mediators?)
7
Q
Growth centers
• Do not respond to (2)
A
tension or pressure
8
Q
Growth sites (3)
A
• Mandibular condyles, sutures, tuberosity
9
Q
Growth sites
cells
A
• Immature cartilaginous cells (not layered)
10
Q
Growth sites
transplant cells
A
• Stop functioning if transplanted (mediators)
11
Q
Growth sites
• Growth sites are sensitive to
A
mechanical stimulations ( tension, pressure)
12
Q
Growth site vs growth center
Differences for Orthodontics (3)
A
- Growth site responds to mechanical stimulation
- Amount of growth is much lower in a growth site
- Growth centers are genetically programmed and less affected by the environment
