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Bones & Joints
Navicular fractures are breaks in the navicular bone—a boat-shaped bone in the midfoot (between ankle and toes) critical for foot arch stability—occurring as either acute fractures from trauma (fall, twist, or crush injury) or stress fractures from repetitive loading (common in athletes, military recruits). Acute navicular fractures present with severe midfoot pain, swelling, and inability to bear weight, often associated with other midfoot injuries. Stress fractures present with insidious pain over weeks/months, worsened by running or impact activities. Navicular fractures are concerning because of poor blood supply to central third of bone (high nonunion risk 10-30% if treated conservatively) and critical role in foot arch mechanics. Treatment depends on fracture type: undisplaced stress fractures require 6-8 weeks non-weight-bearing in boot/cast (to allow healing in poorly vascularized bone), displaced acute fractures or high-risk stress fractures require surgery (screw fixation) with 85-90% union rates when treated appropriately.
What it is and why it happens
Navicular fractures are breaks in the navicular bone—a boat-shaped bone in the midfoot (between ankle and toes) critical for foot arch stability—occurring as either acute fractures from trauma (fall, twist, or crush injury) or stress fractures from repetitive loading (common in athletes, military recruits). Acute navicular fractures present with severe midfoot pain, swelling, and inability to bear weight, often associated with other midfoot injuries. Stress fractures present with insidious pain over weeks/months, worsened by running or impact activities. Navicular fractures are concerning because of poor blood supply to central third of bone (high nonunion risk 10-30% if treated conservatively) and critical role in foot arch mechanics. Treatment depends on fracture type: undisplaced stress fractures require 6-8 weeks non-weight-bearing in boot/cast (to allow healing in poorly vascularized bone), displaced acute fractures or high-risk stress fractures require surgery (screw fixation) with 85-90% union rates when treated appropriately.