Objective: To investigate relationship between the distribution and content change of endotheliotoxin ( ET) and nitric oxide synthetic acid ( NOS) in human gingiva tissue and periodontal diseases. 目的:探讨人牙龈组织中内皮素(ET)及一氧化氮合成酸(NOS)的分布及含量的变化与牙周病发病的关系。
This research didn't find the effect on endotheliotoxin. 本实验未发现对血清内皮素的影响。