bone healing Flashcards
1
Q
porosity
A
increased porosity=increased compressive strength
cortical has <15%
cancellous=70%
2
Q
Strength
A
2% increase in length before failure.
Strongest vs compression than tension. Weakest w shear
3
Q
stiffness cortical vs cancellous
A
cortical 5-10 x more
4
Q
stages
A
inflammation 1-3days
regeneration
remodeling 4 mon
5
Q
Breakdown of regeneration phase
A
Hematoma organization 3-10 days
primary bone callus 6-10 wks (absorbed 2.5-4 months)
6
Q
piexoelectric effect
A
Compression side:electronegative leading to bone
production
Tension side: electropositive leading to bone
resorption
7
Q
direct healing
A
primary intention. no callus, no motion
8
Q
indirect osseus repair
A
callus formation
