Everything about the NAVICULAR!

 

 

The navicular primary ossification center is the last to appear at 3 years.

 

There are classifications for the navicular, which include the Watson-Jones (tuberosity, dorsal lip, body, stress – TABS mneomonic fractures). Navicular body fractures have a classification called the Sangeorzan (3A-C).

 

PTTD pathological joint axis

Kidner

Os tibiale externum

Stress fx:

  1. hard to heal, high rate of non-union. 6-8 weeks NWB, then 4-6 weeks WB immob.
  2. most commonly occurs: middle third

 

Blood supply:

  1. dorsalis pedis artery: dorsal and medial
  2. medial plantar artery: plantar and lateral

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