Hematoma formation, cellular proliferation, callus formation, ossification, remodeling
The order of stages of bone fracture healing is formation of a hematoma, formation of a fibrocartilaginous callus, formation of a bony callus, and, finally, bone remodeling.
Hematoma Formation
Reparitive phase - 2nd phase of bone healing
Hematoma formation
Hematoma formation (when blood rushes from the broken vessels to form a clot) is the first step of fracture healing.
The first stage in healing a bone fracture is the inflammatory stage which can last for a few hours or a few days. The second stage is the repair stage and the third stage is the late remodeling stage. The final stage is rehabilitation.
-bone breaks-blood vessels tear-blood clots (hematoma)- tissues dialate, swell and inflame.-After a few days/weeks, osteoblasts originating from periosteum invade hematoma and divide close to the new blood vessels, building spongy bone nearby.-granulation tissue develops.-Fibroblasts produce masses of fibrocartilage.-Phagocytic cells remove blood clot and damanged cells. Osteoclasts aid in cleaning up bone fragments/debris.-Fibrocartilage fills gap between ends of broken bones=callus (and will be replaced by bone tissue)-Typically more bone is produced at site of healing fracture.....if broken bones are close together, healing is more rapid than far apart.Hematoma formation, fibrocartilaginous callus formation, bony callus formation, and bone remodeling.
Step 1) Inflammation Step 2) Soft Callus Step 3) Hard Callus Step 4) Remodeling
electrical or ultrasound stimulation
A bone fracture is never good. A callus on the bone fracture indicates healing has started.
electrical or ultrasound stimulation
electrical or ultrasound stimulation