Bone 3: developmental orthodontist disease

Question 1

Common developmental orthodox abnormalities seen in equine

Answer 1

1. osteochondrosis -
   a) osteochondritis dessicans
   b) sub chondral bone cyst
2. physics = inflammation growth plate which leads to
   a) angular limb deformities
   b) flexural bone deformities where bone grows more rapidly than assoiated soft tissue)

Question 2

Common developmental orthodox abnormalities seen in canine

Answer 2

Osteochondrosis
 Ununited anconeal process?
 Fragmented medial coronoid process – elbow extremely important in smalls, less so farm and equine

b) hypertrophic osteodystrophy
c) leg calve perthes
d) hip dysplasia

Question 3

Common developmental orthodox abnormalities seen in bovine

Answer 3

1. osteochondrosis (OCD)

2, Flexural deformaties e.g. angulair limb

Question 4

Common developmental orthodox abnormalities seen in porcine

Answer 4

Osteochondrosis (OCD – voer production, grow too fast)
Pigs – bad welfare, growth, intensive, not appropriate exercise
Lame young pigs – gees, diet, hormones, etc = OCD
Herd health

Question 5

Causes of subchondral cyst

appearance on radiograph

Answer 5

2 causes

1. abnormal endochondral ossification - retention cartilage, collapse
2. trauma - articular cartilagee and SC bone, pressure from synovial fluid

area of radiolucency within bone as fluid filled

Question 6

What is physitis?

Answer 6

enlargement of physics (growth plate)
typically in young animals due to:
- inflammation
- disruption of endrochondral ossification at physis

Question 7

Clinical sings physics and treatment

Answer 7

CS = lameness, stiff gait
self limiting
rest, maybe NSAIDs

Question 8

What orthodontist disease typically affects large breed dog 2-8 months

Answer 8

Hypertrophic osteodystrophy

Question 9

Pathogenesis of hypertrophic osteodystrophy

Answer 9

Idiopathic aetiology, assume infection (bac or viral), over supplemnetation or vascular abnormalities

pathogenesis = necrosis of capillary loops of cartilage of metaphyseal physis growth plate long bone.
Lame and sore due to inflammation

get an abnormal cuff of metaplastic cartilage and bone

Question 10

Clinical signs dog with hypertrophic osteodystrophy

Answer 10

lame, fever, lethargic, painful

primarily long bones distal aspect as pathogenesis is necrosis of cartilage in metaphyseal physis