ECE4084 Chapter Notes - Chapter 1: Endochondral Ossification, Bone, Metaphysis
24 Jul 2018
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Contractures (due to a disease of the muscle, muscle becomes fibrous tissue contracts leads to the inability to flex the joint) Developmental dogs: fragmentation of the coronoid process huge cause of lameness in. Idiopathic bone disease secondary hypertrophic osteopathy new bone formation on the periosteal surface. The entire surface of long bone is covered by periosteum, except the ends where articular cartilage is present. Lack of longitudinal blood vessels in the periosteum. Blood supply of immature bones vs mature bones. Inability of blood vessels to cross the physis (cartilaginous growth plate) which separates the epiphysis form the expanded metaphysis at the end of the diaphysis. Afferent supply from principal nutrient artery, proximal and distal metaphyseal arteries, and periosteal arteries that enter bone at areas of heavy fascial attachment. Direction of blood flow is centrifugal: from medullary canal to periosteum. Flat bones with extensive muscle attachment have tremendous extraosseous blood supply in addition to that provided by nutrient arteries.
