Fracture Repair :)

Fracture Repair

1. 1. Hematoma Formation

   • 2b. Fibrocartilage Callus Formation
     • 3. Bony Callus of Trabecular Bone
       • 4. Healed
         • 5. Much later remodeling occurs to polish up
           • Excess diaphysial tissue removed
           • Excess material within medullary cavity also removed
       • Callus= Hardened Bone
   • 2a. New Blood Vessels
     • Phagocytes invade
       • Phagocytes clear away the debris
     • Fibroblasts invade
       • Produce collagen
     • Precursor osteogenic cells invade
       • Chondroblasts
         • lay down cartilage framework
       • Osteoblasts
         • Start forming Spongy Bone
           • Usually within one week of fracture
   • Bone breaks so the periosteum blood vessels break
     • Need to form hematoma
       • WOUND HEALING

2. Very Similar to Endochondral Ossification