Normal fracture healing Flashcards

1
Q

What are the stages of bone healing?

A
  • 3 stages
  • Reactive, reparative, remodelling
  • Reactive and reparative have 2 parts
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Describe the reactive phase of bone healing?

A
  • Occurs within 48 hours of injury
  • 2 parts: haematoma and inflammation
  • Haematoma: bleeding into fracture site and necrosis of bone ends
  • Inflammatory: haematoma invaded by osteoclasts and macrophages which remove dead and damaged tissue
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the 2 parts of the reparative stage of bone healing?

A

Proliferation and consolidation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe the proliferation phase (reparative stage) of bone healing?

A
  • Occurs after 2 weeks
  • Osteoblasts produce osteoid tissue which creates a firm mass/callus around the fracture
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Describe the consolidation phase (reparative stage) of bone healing?

A
  • Occurs after 4-6 weeks
  • Endochondral ossification occurs, leading to woven bone formation
  • Bone regains some mechanical strength
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Describe the remodelling stage of bone healing?

A
  • Turning woven bon into lamellar bone
  • Can take months to years
  • Doesn’t always happen fully, which increases future risks of OA
How well did you know this?
1
Not at all
2
3
4
5
Perfectly