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