The scaphoid bone is the most common carpal fracture.
- 65% of all fractures involve the waist
- 15% proximal pole
- 12% distal pole (more common in kids)
- 8% tubercle
Risk of scaphoid non union and AVN is dependent on the location of the fracture, due to the retrograde dorsal arterial supply (from distal to proximal).
- proximal pole fractures have a high risk of AVN (30%), up to 100% in proximal 1/5 fractures
- waist fractures, uncommon
- distal pole fractures, rare