OCD Flashcards

1
Q

What is osteochondrosis?

A

process of abnormal bone and cartilage formation

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2
Q

What is osteochondritis dissecans?

A

lesions that penetrate the joint surface, creating inflammation and effusion

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3
Q

What is endochondral ossification?

A

bone and cartilage formation

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4
Q

Describe the pathophysiology of OCD

A
  • failure of blood vessels to penetrate the calcified cartilage
  • occlusion of canals
  • epiphyseal necrosis
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5
Q

What are the affects of OCD in young animals?

A
  • thickened cartilage
  • cyst-like changes
  • degeneration of cartilage
  • uncalcified cartilage not vascularized
  • cracks in pathological cartilage
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6
Q

What are the affects of OCD in adult animals?

A
  • subchondral fibrosis
  • fibrocartilage covers the defect
  • sclerosis of subchondral bone
  • osteophyte formation
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7
Q

What are the possible etiologies of OCD?

A
  • genetics
  • nutrition
  • trauma
  • combination of multiple factors
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8
Q

What are the nutrition factors that can results in OCD?

A
  • low Ca with high P
  • excess zinc
  • copper deficiency
  • vitamin A and D deficiency
  • high protein diet
  • high caloric intake
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9
Q

What are the clinical signs associated with OCD?

A
  • synovial effusion (primary sign)
  • lameness
  • decreased range of motion
  • pain on manipulation
  • bog spavin for tarsal crural joint
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10
Q

What are the diagnostic procedures for OCD?

A
  • radiology
  • scintigraphy
  • arthroscopy
  • NMR
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11
Q

What are the locations of OCD in order of most frequent to less frequent?

A
  • tibiotarsal joint
  • stifle
  • fetlock
  • cervical vertebrae
  • shoulder
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12
Q

Where does OCD occur on the tibiotarsal joint?

A
  • distal intermediate ridge of the tibia
  • lateral and medial trochlear ridge
  • lateral and medial malleolus
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13
Q

Where does OCD occur on the stifle?

A
  • lateral and medial trochlear ridge

- medial femoral condyle

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14
Q

Where does OCD occur on the fetlock?

A
  • sagittal ridge of MC III
  • caudal eminence of P1
  • P1 of MC III cyst
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15
Q

Where does OCD occur on the shoulder?

A

humeral head

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16
Q

What are the treatment options for OCD?

A
  • rest is the best tx
  • intra-articular medication
  • joint supplements or chondrorpotective agents
  • arthrotomy or arthroscopy
17
Q

Aggrecan provides what?

A

compressive stiffness to articular cartilage

18
Q

What forms spongiosa?

A

osteoblasts using calcified columns