Shows the pathologic structure of decayed tooth, pulpitis, apical putrescence, paradentitis and apical abscess. 并显示正常牙、龋齿、牙髓炎、根尖坏死、牙周炎和根尖脓肿等病理过程。
At 28 days, the apical abscess enlarged and the fibrous tissue started to proliferate in the periapical tissue. 28天后根尖周出现较为局限较大的脓肿灶,根尖周的纤维组织增殖,也伴有牙槽骨吸收。