BONE FRACTURE

Figure 6.9 Steps in Repair of a Bone Fracture

Process Diagrams Step-by-Step

Copyright © 2007 by John Wiley & Sons, Inc.

Osteon

Periosteum Compact bone Spongy bone Fracture hematoma

Blood vessel

Phagocyte Fracture hematoma Red blood cell Bone fragment Osteocyte

1

Formation of fracture hematoma

Osteon

Periosteum Compact bone Spongy bone Fracture hematoma

Blood vessel Fibroblast Phagocyte Phagocyte Fracture hematoma Red blood cell Bone fragment Osteocyte Fibrocartilaginous callus Osteoblast Collagen fiber Chondroblast Cartilage

1

Formation of fracture hematoma

2 Fibrocartilaginous callus formation

Osteon

Periosteum Compact bone Spongy bone Fracture hematoma

Blood vessel Fibroblast Phagocyte Phagocyte Fracture hematoma Red blood cell Bone fragment Osteocyte Fibrocartilaginous callus Osteoblast Collagen fiber Chondroblast Cartilage

1

Formation of fracture hematoma

2 Fibrocartilaginous callus formation

Bony callus
Osteoblast Spongy bone

Osteocyte 3 Bony callus formation

Osteon

Periosteum Compact bone Spongy bone Fracture hematoma

Blood vessel Fibroblast Phagocyte Phagocyte Fracture hematoma Red blood cell Bone fragment Osteocyte Fibrocartilaginous callus Osteoblast Collagen fiber Chondroblast Cartilage

1

Formation of fracture hematoma

2 Fibrocartilaginous callus formation

Bony callus
Osteoblast Spongy bone

New compact bone Osteoclast

Osteocyte 3 Bony callus formation 4 Bone remodeling