Fracture healing

Question 1

Define fracture?

Answer 1

Breach in continuity of bone

Question 2

Name 3 diseases associated improper bone formation?

Answer 2

Osteoporosis
Osteogenesis imperfecta
Pagets disease

Question 3

What allows blood vessels travel through?

Answer 3

Haversian canal

Question 4

What connects haversian canal?

Answer 4

Volksmann canal

Question 5

What are 3 main stages of fracture healing?

Answer 5

1) Inflammation
2) Repair
3) Remodelling

Question 6

Describe how fracture healed?

Answer 6

1) Haematoma formation
Blood vessels in broken bone tear
Clotted blood- haematoma

2) Bone generation- fibrocartilaginous callus
Capillaries grow into haematoma
Fibroblasts and osteoblasts build bone
Fibroblasts- collagen
Osteoblasts- spongy bone
Fibrocartilaginous callus formed

3) Bony callus formation
Fibrocartilaginous callus converted to bony callus

4) Bone remodelling
Bony callus undergo endochondral ossification
Osteoclasts and osteoblasts remodel bone
Vascularity normal