微循环是指微动脉和微静脉之间的血循环。它包括微动脉、中间微动脉、真毛细血管、微静脉和动静脉吻合等部分,这些血管的直径均小于100μm。牙髓血管在体积上基本上均属微循环的范畴。由于组织中气体、营养素和代谢产物的交换均发生在微循环这一水平上,所以微循环在牙髓生理学和病理学方面均具有重要意义。一、牙髓微循环解剖 Microcirculation refers to the blood circulation between the arterioles and venules. It includes arterioles, middle arterioles, true capillaries, venules and arteriovenous anastomosis and other parts, the diameter of these vessels are less than 100μm. Pulp blood vessels basically belong to the category of microcirculation in size. Microcirculation is of great importance both in pulp physiology and pathology, since the exchange of gases, nutrients and metabolites in tissue occurs at the level of microcirculation. First, the pulp microcirculation anatomy