牙髓的细菌感染通常导致根尖周肉芽肿和囊肿的发生,并常伴有骨质的吸收,即所谓根尖周病变。现在认为,根尖周病变在临床病程上常表现为一系列的活跃扩展期和慢性静止期。此与牙周病的组织损害过程很相似。本文通过近年收集的根尖周肉芽 Bacterial infections of the pulp often result in periapical granulomas and cysts, often accompanied by bone resorption, the so-called apical lesions. Now that the periapical lesions often appear in the clinical course of a series of active extension and chronic quiescence. This periodontal tissue damage process is very similar. In this paper, periapical granulation collected in recent years