Toll-like receptor 4 ( TLR4) is one of the major receptors which mediates the signal's transmembrane transduction, and is of great important to the infective inflammation caused by Gram-negative bacteria. TLR4细菌脂多糖(li-popolysaccharide,LPS)是介导信号跨膜转导的主要受体,对于革兰氏阴性菌的感染性炎症至关重要。
Radicular cyst is a kind of infective odontogenic cyst originated from Malassez epithelial rest proliferation, which stimulated by chronic periapical inflammation. 根端囊肿继发于牙髓感染,因慢性炎症刺激引起Malassez上皮剩余增生而形成的一种炎症性牙源性囊肿。