Abstract: Objective　To study the anatomical characteristics of blood supply of lunar bone by three-dimensional reconstruction of Micro-CT data of nutrient vessel of lunar bone, explore the anatomical mechanism of ischemic necrosis of lunar bone.　Methods　The study had passed the ethical review of Kunming General Hospital of Chengdu Military Region. Twelve fresh adult wrist specimens were perfused with red lead oxide contrast medium and scanned under Micro-CT. The blood supply of lunar bone was reconstructed by Mimics software to measure and analyze statistically the anatomical parameters of nutrient vessels.　Results　(1) The diameter of nutrient pore on the metacarpal side of the lunate was (0.62±0.11) mm, and the diameter of the vascular entrance was (0.59±0.17) mm in volar side of lunate. There was no significant difference between the dorsal side (0.59±0.13) mm and (0.61±0.12) mm (P>0.05). The mean number of nutrient foramen on the metacarpal surface of lunar bone was (3.67±2.74) and that on the dorsal side was (2.41±1.83). The difference was statistically significant (P<0.05). However, there were no statistical difference between the mean number of nutrient foramen, the diameter of nutrient pore and the diameter of the vascular entrance of Type I and Type II. (2) The distribution of nutrient vessels in lunar bone was classified into 3 types, which was Y-shaped in 50% (7 cases), I-shaped in 35.7% (5 cases) and X-shaped in 14.3% (2 cases).　Conclusions　The blood supply of the metacarpal face of lunar bone is abundant, and the ischemic necrosis of lunar bone is more likely to occur after injury. The distribution of nutrient foramen in the proximal ulnar part of the metacarpal surface of the lunar bone is concentrated, and the intervention of ligaments and soft tissues in this area should be minimized during the operation.

Key words: Lunar bone, 　Nutritive artery, 　Vascular perfusion, 　Anatomy, 　Three-dimensional reconstruction