Osteochondritis and Avascular Necrosis

Question 1

Give a reason that children can get osteochondritis

Answer 1

Increased physical activity with repetitive stress

Question 2

What is the name of osteochondritis at the 2nd metatarsal head

Answer 2

Freiburgs

Question 3

What is kohlers disease

Answer 3

Osteochondritis at the navicular bone

Question 4

What is osteochondritis at the lunate of the carpus called

Answer 4

keinbocks disese

Question 5

What is Panners disease

Answer 5

OC at the capitellum of the elbow

Question 6

Wha tis compression OC of the vertebrae called

Answer 6

Scheuermanns

Question 7

What is avascular necrosis

Answer 7

an ischaemic necrosis of bone predominantly in adults

Question 8

What sites are prone to AVN

Answer 8

femoral head
femoral condyles
head of humerus
capitellum
Proximal pole of scaphoid
Proximal part of talus

Question 9

Name some causes of AVN

Answer 9

fracture disrupting blood supply
alcoholism
steroids (both alter fat metabolism)
Anything which increases the fat content of blood or increases coagulability eg thrombophilia, sickle cell disease, SLE
Caissons disease- nitrogen gas bubble in circulation after deep sea diving

Question 10

What happens to the bone in AVN

Answer 10

patchy sclerosis before subchondral collapse and irregularity of the articular surface