Lunate Fractures

The blood supply of the lunate is through proximal carpal arcades usually along its palmar and dorsal surfaces, but up to 1/4 of lunates may have a single supply (either dorsal or palmar). Lunate fractures make up less than 1% of all carpal fractures. Acute fractures are classified into five groups:

• Frontal fractures of the palmar pole: The palmar nutrient arteries are involved
• Osteochondral fractures of the proximal articular surface: No substantial damage to nutrient vessels
• Frontal fractures of the dorsal pole
• Transverse fractures of the body
• Transarticular frontal fractures of the body

References

Rockwood and Green's Fractures in Adults. 7th ed. p 804.