早期组化研究发现,人牙髓中有交感神经的末梢分布于牙髓血管附近,提示其可能有控制牙髓血流的作用.本研究旨在确定人牙髓中是否存在突触前肾上腺家受体和牙髓的交感神经释放去甲肾上腺素是否受突触前肾上腺索受体和多巴胺受体的调控。 材料和方法 将取自18～30岁健康人的上、下颌第三磨牙和前磨牙的牙髓组织,切成重约4mg的小块,37℃下,95％O_2:5％CO_2环境中用Krcbs液预孵45 Early histochemical study found that the distribution of sympathetic nerve endings in the human dental pulp near the pulp blood vessels suggests that it may have the effect of controlling dental pulp blood flow.This study aimed to determine whether there is presynaptic adrenal gland in human dental pulp Sympathetic Nerve Release from Nerve and Pulp Norepinephrine Is Regulated by Presynaptic Adrenal Strontium and Dopamine Receptors. MATERIALS AND METHODS Pulp tissues from the upper and lower mandibular third molars and premolar from healthy people aged 18-30 years were cut into small pieces weighing about 4 mg and incubated in 95% O 2: 5% CO 2 at 37 ° C Pre-incubation of Krcbs 45