2 - Theories of Craniofacial Growth Flashcards
Genetics + environment =
Epigenetics
What keeps the teeth and jaws in their position?
Balance of forces
Is the duration or force or the magnitude more important?
Duration of force
Describe what Equilibrium theory is
- Balance of forces keeps teeth and jaw in position
- Duration of force more important
Should there be a balance between cheek pressure and tongue posture?
Yes
What would cause unfavorable dentoalveolar growth?
- Mouth breathing
- Sleep apnea
What are the dental effects of mouth breathing?
- Anterior open bite
- Maxillary incisor protrusion
- Mandibular incisor protrusion
- Narrowing of maxilla
- Mandibular retrusion
This is the epiphysis of long bones
Growth centers
These are responsible for the growth of long bones
Growth centers
Do growth centers respond to tension or pressure?
No
Describe growth centers?
- Epiphysis of long bones
- Don’t respond to mechanical stimuli
- Cells are layered
- You can transplant and they will have same function
Mandibular condyles, sutures, tuberosities have growth sites or centers?
Growth sites
In Growth sites or centers are cells layered?
Growth centers
What kind of cells are in growth sites?
Immature fibrocartilaginous cells (not layered)
Do growth sites respond to mechanical stimulation?
Yes
In growth sites, if you have tension (pull bone), what happens?
Bone growth
In growth sites, if you have pressure (push bone), what happens?
No bone growth
Describe growth sites
- Immature fibrocartilaginous cells (not layered)
- Cannot transplant
- Found in cranio-facial complex
- Sensitive to mechanical stimulation
Do growth sites or growth centers grow more?
Growth centers
Growth sites or centers are genetically programmed?
Growth centers
Are growth sites or centers less affected by the environment?
Growth centers
Can you transplant growth sites or growth centers so that they have the same function?
Only growth centers
Where are growth centers NOT found? Except?
Cranio-facial complex
Only in the cranial base
