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8 Cards in this Set
- Front
- Back
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What is the name of the cells located on the outside of the peristeum (bone structure)?
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The osteoprogenitor cells.
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What does healing of a bone fracture depend on?
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The peristeum.
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Osteoprogenitor cells.
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are located on outer surface of peristeum, and give rise to the osteoblasts.
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What are the most important cells in the bone and why?
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the osteoblasts, they produce the bone matrix.
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What is unique about the pisiform bone and the patella if they are fractured?
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for one they are both sesamoid bones, and they do not have peiosteum, if they are fractured there will not be a boney union, can not heal.
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What covers the peristeum?
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is covered by muscles, get blood vessels from the muscles-muscular arteries. Important concept-periosteum vessels is supplied by muscular arteries.
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Why is it important to know about the muscle surrounding the periosteum, say for example in the tibia?
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at the bottom 1/3 of the tibia there is no muscle surrounding bone (or periosteum)if fractured there is difficulty in healing, it takes a long time b/c periosteum blood vessels is less. tibia fracture can take 6 months to heal compared to 6-8 weeks in a normal fracture.
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Fill in the blank, if periosteum vessels are rich/abundant a fracture will heal----, and if they are sparse it will heal-----?
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faster, longer.
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