Bone Healing Flashcards
What is the fancy name given to bone healing?
Secondary intention
What is the definition of clinically healed?
Able to weight bare
What are the 3 phases of bone healing?
Reactive
Repairative
Remodelling
How long is the reactive phase?
24-72 hours
What happens in the reactive phase?
Bleeding
What does bleeding in the reactive phase allow?
Inflammatory cells and growth factors to enter the break
What do the inflammatory cells form in the reactive phase?
A granuloma
What aspect of the reactive phase stimulates osteoclasts/blasts?
The accumulation of immune cells and growth factors
How long does the repairative phase last?
4-40 days
What happens to osteoblasts in the repairative phase
Proliferation –> collagen development
What is the name of the collagen when it initially develops during the repairative phase?
Primary callus
What does the primary callus develop into?
It hardens and forms the secondary hard callus
How long does the remodelling phase last?
25+ days
What type of healing does natural and surgical nailing follow?
Callus
What type of healing does internal fixation follow?
Bone healing = skips callus formation
