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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