Difference between revisions of "Bone Response to Damage"
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| − | + | {{review}} | |
| − | === | + | {{toplink |
| − | + | |backcolour =CDE472 | |
| − | + | |linkpage =Musculoskeletal System - Pathology | |
| − | + | |linktext =Musculoskeletal System | |
| + | |maplink = Musculoskeletal System (Content Map) - Pathology | ||
| + | |pagetype =Pathology | ||
| + | |sublink1=Bones - Pathology | ||
| + | |subtext1=BONES | ||
| + | }} | ||
| + | <br> | ||
| − | + | ===Changes to normal structure=== | |
| − | Circumferential incision (e.g. during [[Bones Fractures - Pathology|fracture]]) | + | **Damage to periosteum: |
| − | *Longitudinal bone growth results | + | ***Invokes a hyperplastic reaction of the inner layer |
| − | *May be only on one side where periosteum is damaged | + | ***Is painful |
| − | **Used by surgeons to treat [[Angular | + | ***Exostoses can remodel or remain |
| + | **Lifting of periosteum causes new bone formation below | ||
| + | **Circumferential incision (e.g. during [[Bones Fractures - Pathology|fracture]]) | ||
| + | ***Longitudinal bone growth results | ||
| + | ***May be only on one side where periosteum is damaged | ||
| + | ****Used by surgeons to treat [[Bones Developmental - Pathology#Angular limb deformity|angular limb deformities]] | ||
===Physis (Growth plate)=== | ===Physis (Growth plate)=== | ||
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**Regulated by androgens | **Regulated by androgens | ||
*If growth teporarily stops -> layer of bone seals the growth plate -> moves into metaphysis when growth resumes -> forms '''Harris lines''' | *If growth teporarily stops -> layer of bone seals the growth plate -> moves into metaphysis when growth resumes -> forms '''Harris lines''' | ||
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Revision as of 14:46, 26 September 2008
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Changes to normal structure
- Damage to periosteum:
- Invokes a hyperplastic reaction of the inner layer
- Is painful
- Exostoses can remodel or remain
- Lifting of periosteum causes new bone formation below
- Circumferential incision (e.g. during fracture)
- Longitudinal bone growth results
- May be only on one side where periosteum is damaged
- Used by surgeons to treat angular limb deformities
- Damage to periosteum:
Physis (Growth plate)
- Site of many congenital or nutritional bone diseases in the growing animal
- Open in neonates and growing animals
- Chondrocyte proliferation balances cell maturation and death
- Closes and ossifies at maturity
- Regulated by androgens
- If growth teporarily stops -> layer of bone seals the growth plate -> moves into metaphysis when growth resumes -> forms Harris lines