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Bone Response to Damage (view source)
Revision as of 15:03, 28 September 2007
, 15:03, 28 September 2007no edit summary
**'''Woven bone''':
**'''Woven bone''':
***"Random weave" which is only a normal feature in the foetus
***"Random weave" which is only a normal feature in the foetus
***Coarse collagen fibres
***Later removed by osteoclasts and replaced by lamellar bone
***In adults it is a sign of a pathological condition (e.g. fracture, inflammation, neoplasia)
***In adults it is a sign of a pathological condition (e.g. fracture, inflammation, neoplasia)
**'''Lamellar bone''':
**'''Lamellar bone''':
***Orderly layers which are much stronger than woven bone
***Orderly layers which are much stronger than woven bone
***Fine collagen fibres in concentric or parallel laminae
***Two main types:
***Two main types:
****'''Compact bone''' (cortical)
****'''Compact bone''' (cortical)
*****In vertebrae, flat bones and epiphyses of long bones
*****In vertebrae, flat bones and epiphyses of long bones
*****Contains no Haversian systems
*****Contains no Haversian systems
**'''Laminar bone'''
***Formed on periosteal surface of diaphysis
***Accomodates rapid growth of large dogs and farm animals
***Plates of woven bone from within the periosteum
***Concentric plates
***As it forms, it fuses with the bone surface