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TRANSCRIPT
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Orthopedic Radiology
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Evaluate all parts of each bone
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For each part of the bone
Look for changes in
Shape
Contour
Size
Radiopacity
Texture
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Aggressive v. Non Aggressive
Bone Disease
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Aggressive Bone Disease
Potentially Life Threatening
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Aggressive Bone Disease
Potentially Life Threatening
Neoplasia
Infection
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Opposite ends of a spectrum of change
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A key characteristic is the margination of the lesion
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A key characteristic is the margination of the lesion
aka
zone of transition
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Clearly defined margins
Non aggressive or benign
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Poorly defined margins
Aggressive
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Bone can only respond in two ways to a pathological insult
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Bone Production
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Bone Production
Bone Destruction
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Bone Destruction
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Aggressive Destructive
Lesion
Geographic and
Motheaten
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Aggressive Destructive
Lesion
Poor Margination
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Geographic and motheaten lysis
Good Margination - Osteomyelitis
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Bone Production
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THE PERIOSTEUM
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Linear Periosteal Reaction
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Solid Periosteal Reaction
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Lamellated Periosteal Reaction
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Amorphous Periosteal Reaction
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Sunburst Periosteal Reaction
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Amorphous Periosteal Reaction
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Codmans Triangle
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Bone Expansion
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Osteomyelitis
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HAEMATOGENOUS
SPREAD FROM A CONTIGUOUS SOURCE
DIRECT IMPLANTATION
POST OPERATIVE INFECTION
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Initial
Appearance
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2 Weeks
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Early Septic Periostitis
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Late Septic Periostitis
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Sequestrum
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Sequestrum
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Radiology of Fractures
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Classification of Fractures
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Describe the Orientation of the Fracture
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FRACTURE HEALING
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FACTORS AFFECTING FRACTURE HEALING
Degree of Trauma
Degree of Bone Loss
Type of Bone Involved
Extent of Immobilization
Presence of Infection
Specific Bone Involved
Age of Animal
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Degree of Trauma
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Degree of Bone Loss
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Type of Bone Involved
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Extent of Immobilization
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Presence of Infection
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Specific Bone Involved
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Age of Animal
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Immediate
Post
Fracture
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Immediate Post
Repair
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2 Weeks Post Repair
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7 weeks Post Repair
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Complications of Fracture Repair
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Osteomyelitis
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Osteomyelitis
Implant Loosening
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Radiolucent Halo Around Implants
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Immediate Post Fracture
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4 Weeks Post Fracture
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8 Weeks Post Repair
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Immediate Post Revision
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10 Weeks Post Revision