Bone Fractures Fracturebreak in a bone Types of

$Bone Fractures • Fracture—break in a bone • Types of bone fractures – Closed$

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

Common Types of Fractures Table 5. 2

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

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

$Supracondylar fracture of humerous one of the most common childhood fractures$

Supracondylar fracture of humerous one of the most common childhood fractures

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

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

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

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

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

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

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 Internal callus (fibrous tissue and cartilage) Hematoma formation Bony callus of spongy bone New blood vessels Fibrocartilage callus formation Spongy bone trabecula Healed fracture Bony callus formation Bone remodeling

Stages in the Healing of a Bone Fracture Hematoma formation Figure 5. 5, step 1

Stages in the Healing of a Bone Fracture Hematoma External callus Internal callus (fibrous tissue and cartilage) New blood vessels Spongy bone trabecula Hematoma formation Fibrocartilage callus formation Figure 5. 5, step 2

Stages in the Healing of a Bone Fracture Hematoma External callus Internal callus (fibrous tissue and cartilage) Bony callus of spongy bone New blood vessels Spongy bone trabecula Hematoma formation Fibrocartilage callus formation Bony callus formation Figure 5. 5, step 3

Stages in the Healing of a Bone Fracture Hematoma Internal callus (fibrous tissue and cartilage) External callus Bony callus of spongy bone New blood vessels Healed fracture Spongy bone trabecula Hematoma formation Fibrocartilage callus formation Bony callus formation Bone remodeling Figure 5. 5, step 4