Bone Healing

4 steps of bone healing

-hematoma forms -fibrocartilage callus forms -bony callus forms -bone remodeling

Step 2: how a bone heals after a fracture

fibrocartilage forms -capillaries grow into the hematoma -fibroblasts and osteogenic cells invade the fracture site from the periosteum and endosteum -phagocytic cells enter and clean up debris

Reduction

realignment of the broken bone ends

Fracture

a complete or incomplete break in a bone

Step 1: how a bone heals after a fracture

a hematoma forms -blood vessels break and hemorrhage(bleeding) -formation of a hematoma(mass of blood outside blood vessels) -tissue at site becomes swollen, painful, inflamed

Step 4: how a bone heals after a fracture

bone remodeling occurs -excess material is resorbed -new compact bone is laid down to reconstruct the bone walls

Step 3: how a bone heals after a fracture

bony callus forms -cartilage gradually converted to spongy bone -repeat steps of endochondral ossification