Bone Repair

Question 1

Steps in bone repair

Answer 1

Hematoma
Fibrocartiaginous callus
Bony callus
Bone remodeling

Question 2

Step one

Answer 2

Hematoma forms:
Blood vessels clot
Inflammation last 6-8 hours

Question 3

Step two

Answer 3

Fibrocartiaginous callus forms
Phagocytic cells clear debris
Spongy bone starts forming (osteoblasts)
Fibroblasts secrete collagen fibers to connect bone ends
Lasts about 3 weeks

Question 4

Step 3

Answer 4

Bony callus formed
New trabeculae form a bony hard callus
Continues until firm (2 months)

Question 5

Step 4

Answer 5

Bone remodeling
I response to stressors
Final structure resembles original