why does cartilage heal slower than bone

Cartilage heals slower than bone because cartilage is avascular. Meaning there is no blood vessels. The lack of blood flow creates a slow healing process. br Bone heals faster than cartilage because cartilage is avascular (no blood flow). This means that the blood flow necessary in injury repair will not get to the cartilage immediately; it will take much longer. Bone, however, does have blood flow because bone marrow produces red blood cells, which are able to repair the damage to the bone. br Cartilage has a very poor blood supply which means that nutrients to aid healing are not readily available and it therefore takes a long time to heal, if indeed it does. Bone on the other hand, has an excellent blood supply which helps remove damaged tissue and debris plus it brings a healthy supply of new cells to support rapid remodelling. A completely healed bone (provided the fracture wasn't complicated) will lead to a structure that is just as strong as it was prior to injury. Although the main building work is done by approximately 8 weeks or so, it will actually take up to two years for full strength to be returned. Proper rehabilitation will ensure that the process is optimised e. g by doing weight bearing exercise as appropriate to strengthen the bone.
Why Does Some Broken Bones Take Longer To Heal?

What happens if your broken bone takes longer to heal than you are expecting? Pover my lifetime and the time it took to heal each bone depended on the severity of injury, location, and other factors. Typically, a broken bone can take anywhere from 4-16 weeks to heal, with the typical understanding that most bones should take 6 weeks to heal. But several things such as: age, severity of injury, other medical problems, location of injury and much more can drastically affect the healing process. It is important to understand that a broken bone is also called a bone fracture. There are many different structural types of fractures. In the orthopedic community, or the medical expertise about bones and injuries, about 5 to 10 percent of all broken bones go on to a delayed union or non-union. PThisPmeans that thePbroken bone is not healing at the expected rate or have stopped healing entirely. There are some common reasons for the healing of bones Pto be less than ideal. 1. ) P Age of the patient: The older we get the slower our body tends to heal. 2. ) P Co-morbidity: P This means we might have other diagnosis or medical conditions that can slow our tissues growth, including bones.

Such examples would be: autoimmune,P, cancer, and many others. 3. ) PSeverity of injury: P The bone injury might be worse than initially thought. The expected healing process may be longer than anticipated because the injury might be worse that originally pictured. Some fractures involveP which may be a more severe injury and prevent healing. 4. ) P Specific bone involved: P Not all bones are created equal. Some bones such in hands and feet might have less blood flow to them. This decreases the rate of recovery. Some bones because of the type of injury and location simply will not heal on their own. The first attempt is to allow the body to heal but if this can t happen surgery or other options may be necessary. 5. ) P Misdiagnosis: P The process isn t perfect. An sees 2 dimensionalPof an area and sometimes it is hard to really appreciate the extent of an injury. Sometimes someone may walk on a sprain that latter turns out to be a fracture. How does a Bone Heal?

The healing process is similar in all bone fractures. 1. )P 2. ) PBone production 3. ) PBone remodeling 1. ) PInflammation PBleeding occurs into area bone and soft tissue P( Hematoma PClotting of 2. ) PBone production PSoft callus POver time, soft callus is replaced by hard bone also called Hard callus 3. ) PBone remodeling PRemodeling of bone as it forms, becomes compact, and returns to original shape PBlood circulation improves in the area. PWeight-baring helps encourage bone remodeling when the right time is seen. Types of Bone Fractures 1. ) 2. ) 3. ) 4. ) 5. ) 6. ) 7. ) 8. ) 9. ) 10. ) 11. ) 12. ) 13. ) 14. ) 15. ) 16. ) 17. ) To learn more about the specific fracture link here: P Non-Union This is the term that describes when a bone is unable to heal. PThis can happen for several reasons such as infection, lack of appropriate blood supply, and when the patient or the bone itself moves too much. This can result in a fake joint also known as pseudo-joint formation. This happens when cartilage forms where bone should have. PIf the nonunion continues past 6 months of the injury a surgical option may be the only way to ensure healing of the bone.

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