根尖周肉芽肿是指根尖周牙周膜受根管内病原慢性刺激，表现以增生为主的炎症反应，肉芽组织形成，根尖周正常组织结构破坏，以肉芽组织取代根尖周组织。
上述抗原定位于根尖周肉芽肿的渗出区、坏死区及根尖面，并与巨噬细胞有关。
The anaerobic bacteria with their antigens as mentioned above were found in the exudative zone, necro'tic zone and granulomas adjacent to the root-apex, and were also related to macrophage.
探讨牙根尖周肉芽肿及慢性牙根尖周脓肿患牙体外充填处理后再植的临床效果，并比较不同年龄段和牙位对其治疗效果影响。
To explore the effect of periapical granuloma and abscess treated by vitro filling and replanting and to investigate the influence of efficacy by patient's age and places of teeth.
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