Abstract: Aim: To investigate the distribution of substance P immunoreactive (SP-IR) nerve fibers in rat dental pulps and the change of them during chronic pulpitis.

• 文摘:目的：观察P物质阳性(SP-IR)神经纤维在正常牙髓中的分布，及其在慢性炎症过程中的变化，探讨SP与牙髓炎症的关系。