Zmener O, Dominguez F V
Department of Oral Pathology, Faculty of Odontology, University of Buenos Aires, Argentina.
Oral Surg Oral Med Oral Pathol. 1988 Jan;65(1):94-100. doi: 10.1016/0030-4220(88)90200-9.
A series of cytologic imprints obtained from periapical granulomas were studied with the conventional light microscope, the scanning electron microscope, and the electron microprobe to analyze the chemical composition of several black deposits that were randomly observed near or in the cytoplasm of macrophages and multinucleated giant cells. These granulomas had been removed from endodontically treated human teeth in which the root canals had been obturated with silver cones and Grossman's sealer 3 to 5 years previously. To investigate whether corrosion had occurred on the silver cones, the cones were also examined with the scanning electron microscope and the electron microprobe. Our observations revealed that all the examined silver cones showed different degrees of corrosion on their surfaces, whereas different concentrations of silver, sulfur, and chlorine were detected at the same sites in the cytologic imprints. However, it is impossible to determine from this study whether the presence of corrosive by-products in the periapical tissues is responsible for the development of a pathologic reaction at these sites.
对从根尖肉芽肿获取的一系列细胞学印片进行了研究，采用传统光学显微镜、扫描电子显微镜和电子微探针分析巨噬细胞和多核巨细胞的细胞质附近或内部随机观察到的几种黑色沉积物的化学成分。这些肉芽肿取自根管已用银尖和格罗斯曼封闭剂充填3至5年的经牙髓治疗的人牙。为了研究银尖是否发生了腐蚀，还使用扫描电子显微镜和电子微探针检查了银尖。我们的观察结果显示，所有检查的银尖表面均呈现出不同程度的腐蚀，而在细胞学印片中的相同部位检测到了不同浓度的银、硫和氯。然而，从这项研究中无法确定根尖周组织中腐蚀性副产物的存在是否是这些部位发生病理反应的原因。
