bone healing

2. Bone Fractures
• Fracture—break in a bone
• Types of bone fractures
– Closed (simple) fracture—break that
does not penetrate the skin
– Open (compound) fracture—broken
bone penetrates through the skin
• Bone fractures are treated by reduction and
immobilization

5. Common Types of Fractures
Table 5.2

6. Comminuted fracture-bone breaks into many pieces. Common in older people with brittle
bones.

7. Supracondylar fracture of
humerous one of the most
common childhood fractures

8. Comminuted fracture-bone breaks into many pieces. Common in older people with brittle
bones.

9. Compression fracture-bone is crushed. Common in osteoporotic (porous) bones.

10. Depressed skull
Depressed fracture-broken bone portion is pushed inward. Typical of skull fracture.

11. Repair of Bone Fractures
• Hematoma (blood-filled swelling) is formed
• Break is splinted by fibrocartilage to form a callus
• Fibrocartilage callus is replaced by a bony callus
• Bony callus is remodeled to form a permanent patch
Hematoma
External
callus
Bony
callus of
spongy
bone
Healed
fracture
New
blood
vessels
Internal
callus
(fibrous
tissue and
cartilage)
Spongy
bone
trabecula
Hematoma
formation
Fibrocartilage
callus formation
Bony callus
formation
Bone remodeling

12. Stages in the Healing of a Bone
Fracture
Figure 5.5, step 1
Hematoma
Hematoma
formation

13. Stages in the Healing of a Bone
Fracture
Figure 5.5, step 2
Hematoma
External
callus
New
blood
vessels
Internal
callus
(fibrous
tissue and
cartilage)
Spongy
bone
trabecula
Hematoma
formation
Fibrocartilage
callus formation

14. Stages in the Healing of a Bone
Fracture
Figure 5.5, step 3
Hematoma
External
callus
Bony
callus of
spongy
bone
New
blood
vessels
Internal
callus
(fibrous
tissue and
cartilage)
Spongy
bone
trabecula
Hematoma
formation
Fibrocartilage
callus formation
Bony callus
formation

15. Stages in the Healing of a Bone
Fracture
Figure 5.5, step 4
Hematoma
External
callus
Bony
callus of
spongy
bone
Healed
fracture
New
blood
vessels
Internal
callus
(fibrous
tissue and
cartilage)
Spongy
bone
trabecula
Hematoma
formation
Fibrocartilage
callus formation
Bony callus
formation
Bone remodeling