牙周病人是因厌气性革兰氏阳性菌对牙周组织的慢性感染,激活了宿主的免疫系统,引起的组织破坏。此系一些细菌混合感染,寄生于牙周袋内,没有什么专性的特定菌,其发生及发展主要取决于宿主的防御机能。因此,当前牙周病病理的主要研究方向为①检查患者及其家属 Periodontal patients are chronic infections of periodontal tissue due to anaerobic Gram-positive bacteria, activating the host's immune system and causing tissue destruction. This is a mixed infection of some bacteria, parasitic in the periodontal pocket, there is no specific specific bacteria, its occurrence and development depends on the host defense function. Therefore, the main research direction of the current periodontal pathology is ① examine patients and their families