Objective To investigate the location and distribution of triquetral bone nutrient foramen and the shape of the intraosseous vessels and analyze the micro-structure of the triquetral bone by perfusion. Methods Twelve specimens were perfused with gelatin powder and Pb3O4 mixed perfusion solution. After perfusion, scanning was performed by Micro-CT. The distribution of nutrient foramen in triquetral bone, the shape of intraosseous vessels, the diameter of blood vessels and the microstructure of bone were measured and analyzed by three-dimensional vascular reconstruction of the Mimics software after obtaining the result of tomography. Results The relatively constant nutrient foramen could be observed on the proximal volar of triquetral bone, dorsal ulnar side of the body and distal dorsal sides of triquetral bone. The numner of nutrient foramen on the proximal volar side was 1.42±0.51, the body ulnar dorsal side was 1.58±0.51, and the distal dorsal side was 3.25±0.87. The diameter of intraosseous vessels in proximal volar side, the body ulnar dorsal side, the distal dorsal side were (0.52±0.07) mm, (0.48±0.11) mm and (0.48±0.12) mm, respectively. There was no significant difference in the diameter of the nutrient foramen between the two groups. The nutrient vessels on the proximal volar side of the triquetral bone extended deeply into the bone, paralleling to the long axis of the triquetral bone. There were many nutrient vessels on the distal dorsal side of the triquetral bone, but the vessels that continued into the bone were short and shallow. Conclusions (1)There are constant nutrient foramen and vessels in the proximal metacarpal, ulnar dorsal and distal dorsal sides of the triquetral bone. (2)The nutrient vessels in the proximal metacarpal are the main blood supply source of the triquetral bone, followed by the nutrient vessels in the ulnar dorsal side of the body. (3)The sparsity of the trabecula in the dorsal side of the triquetral bone may be related to the dorsal avulsion fracture, which need further verified.
Key words
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Triquetral bone /
Vascular perfusion /
Microstructure /
Micro-CT
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