os calcis fractures

Question 1

which wall of the calcaneus is weaker?

Answer 1

the lateral wall

neutral triangle

Question 2

how good are plain films for calcaneal fracutres?

Answer 2

very good, can assess almost all

Question 3

how does bohlers angle work?

Answer 3

the posterior bone fragments gets pushed upwards.

And so the angle is reduced

Less than the expected 30 degrees.

Question 4

what are the signs of the calcaneal fracture?

Answer 4

Break in cortex (Fig 1b)
Abnormal sclerosis (Fig 1c)
Interruption of trabeculae (Fig 1d)
Loss of posterior facet congruity (Fig 1e)
Resultant reduction of Bohler's angle

Question 5

does normal Bohlers exclude a fracture?

Answer 5

no

Question 6

what fractures are associated with calcaneal fractures?

Answer 6

lumbar vertebrae from falling hard.

Question 7

What percentage of fractures are intra vs extra articular/

Answer 7

75%

75% of calcaneal fractures, the fracture line extends into the posterior articular facet, which is the largest articular surface of the calcaneus forming part of the subtalar joint.

Question 8

axial loading on the calcaneus can cause what kind of intraarticular fractures?

Answer 8

shear and compression

Question 9

Shear fractures happen how?

Answer 9

sagittal split in middle form axial force

Question 10

Compression fractures happen how?

Answer 10

axial force but it is a vertical fracture.

Question 11

classification for calcaneus fractures

Answer 11

many types

Sanders is covered on RiTI

Question 12

complications after calcaneal fractures

Answer 12

Peroneal tendon impingmenet
arthritis (subtalar and calcaneocuboid)

Also 
Malposition
Malunion
Tendonitis
Dislocation
Ankle pain
Heel exostoses
Heel pad pain