Bone Callous Formation
- Bone is living tissue that is continually broken down and rebuilt throughout a persons life.
- Bone callous formation occurs when a bone is broken and repaired.
- If a bone is broken it is able to re-grow and bridge the line of fracture with new tissue.
- The repair mechanism is activated rapidly after injury but the actual full repair can take weeks
- Once mended a broken bone may take months to regain its former strength.
How it happens:
When a bone is fractured the healing process begins immediately:
- Blood from damaged vessels near the injury form a clot around the bone, preventing further bleeding.
- Within days, cells known as fibroblasts start to build up fibrous tissue at the site.
- This tissue build up is the formation of bone callous.
- This bridges the gap between the broken bone ends, replacing the blood clot.
- After about two weeks, spongy bone is deposited on the callous, filling in the gap and keeping the bone ends stable.
- The damaged blood vessels heal and grow across the break. This bone will gradually become harder as more spongy tissue is deposited.
- After about three months new compacted bone has replaced the callous.
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Return from Bone Callous Formation to Skeletal System