Difference between revisions of "Bone Response to Damage"
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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 [[Bones Fractures - Pathology|fracture]]) | |
| − | + | *Longitudinal bone growth results | |
| − | + | *May be only on one side where periosteum is damaged | |
| − | + | **Used by surgeons to treat [[Angular Limb Deformity|angular limb deformities]] | |
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===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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| + | ==Test yourself with the Bone and Cartilage Pathology Flashcards== | ||
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| + | [[Bones_and_Cartilage_Flashcards_-_Pathology|Bones and Cartilage Flashcards]] | ||
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| + | [[Category:Bones - Pathology|A]] | ||
Latest revision as of 12:39, 3 March 2011
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
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