Theories of Craniofacial Growth Flashcards
What are the three things that determine craniofacial growth?
- genetics/DNA
- environment (such as ortho)
- epigenetics (gene expression)
What is the equilibrium theory proffitt?
- Balance of forces keep the teeth and jaws in their position
- Duration of force more important than magnitude
What are the forces that must be balanced to keep teeth/jaws in position?
muscules of mastication
lingual muscles
oro-facial muscles
Balance between cheek pressure and tongue posture is called…
functional matrix
What are the dental effects of mouth breathing?
- Anterior open bite
- Maxillary incisor protrusion
- Mandibular incisor retrusion
- Narrowing of the maxilla
- Mandibular retrusion?
Is mouth breating genetic or function not optimized?
depends on the person
What can cause an anterior openbite?
- tongue pushing against anterior teeth
- facial muscles too weak to provide counter balance
What is different about the maxilla and mandible in skeletal-dentoalveolar?
maxilla - dento alveolar
mandible - short ramus
There are no growth ______ in the craniofacial complex
centers
- except for the cranial base
What is the only place that has a growth center in the cranio-facial complex?
cranial base
What are the characteristics of growth centers?
- Epiphysis of long bones
- Responsible for growth of long bones
- Cells are layered in a precise manner
- Transplanted cell will continue to grow
- Do not respond to tension or pressure
Do growth centers respond to tension or pressure?
No
What is responsible for growth of long bones?
growth centers
Transplanted cells will continue to growth in growth sites or centers?
growth centers -> genetically programmed
What are the characteristics of growth sites?
- Mandibular condyles, sutures, tuberosity
- Immature cartilaginous cells (not layered)
- Stop functioning if transplanted (mediators)
- Growth sites are sensitive to mechanical stimulations (tension, pressure)
