Pressure tension theory and forces Flashcards
1
Q
Describe the pressure tension theory
A
Optimum force applied to tooth
Chemical messengers trigger cellular reactions
Results in area of pressure/tension
Cells react to force
Osteoblasts – tension side – deposit bone – recruit osteoclast
Osetoclasts – pressure side, resorb bone in front of root
Osteocytles – detect mechanical load on bone
Alveolar bone changes – allows tooth movement, results in frontal resorption.
2
Q
What is the optimum force for intrusion?
A
10-20 g
3
Q
What is the optimum force for extrusion?
A
35-60g
4
Q
What is the optimum force for rotation?
A
35-60g
5
Q
What is optimum force for torque?
A
50-100g
6
Q
What is the optimum force for bodily movement?
A
60-120g
