Three-dimensional reconstruction of intraosseous vascular anatomy of the talus: a micro-computed tomography study
Journal Title: Biomedical Transformation - Year 2021, Vol 2, Issue 1
Abstract
Objective To acquire three-dimensional intraosseous artery of the talus in order to interpret the prognosis of talus fractures. Methods Lower extremities of twelve fresh corpses were acquired. The femoral arteries in the femoral triangle were cannulated and manually perfused with lead-based contrast agent. Every harvested talus was scanned using a microCT scanner (Inveon, Siemens Ltd., USA). The 3D high-accuracy models of the talus were generated at 52.30 μm. The distribution and pattern of arteries in each section were obtained and the intraosseous branches were counted. Results The numerous extraosseous arteries were mainly running in the articular capsules and ligaments around the talus. We identified four vascular zones on the talus surface including tarsal canal-tarsal sinus, superior talus neck, medial talus body and posterior tubercle. A vessel ring around the talus neck was formed by the anastomosing of the extraosseous vessels in the tarsal canal-tarsal sinus and on the superior talus neck (the number of intraosseous branches are 5.1±1.3 and 5.6±1.9), which was the primary blood supply of the talus. The intraosseous branches of the ring were distributed in the talus head, talus neck and most of the talus body with abundant anastomoses. Besides from the ring, the talus body also received intraosseous blood supply from medial talus body (3.2±1.4 intraosseous branches) and posterior tubercle (0.7±0.5 intraosseous branches). Conclusion A severer destruction of the intraosseous branches of vascular ring resulting from talus neck fracture would pose a higher risk of talus avascular necrosis. As for talus body, the sagittal fracture and comminuted fracture caused relatively more damage to the intraosseous branches of vascular ring, thus leading to an increased potential of avascular necrosis. The osteonecrosis due to talar head fractures is rare because of the rich blood supply of talar head.
Authors and Affiliations
Li Yanzhang, Wang Dingyu, Fang Xuan, Jiao Chen, Guo Qinwei, Hu Yuelin, Zhang Weiguang, Jiang Dong
Keywords
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- EP ID EP767202
- DOI 10.12287/j.issn.2096-8965.20210114
- Views 10
- Downloads 0
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