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  Indian J Med Microbiol
 

Figure 1: The preoperative periapical radiograph of tooth #15, it had a previous root canal treatment with symptomatic apical periodontitis. This radiograph shows the poor quality of the previous coronal restoration

Figure 1: The preoperative periapical radiograph of tooth #15, it had a previous root canal treatment with symptomatic apical periodontitis. This radiograph shows the poor quality of the previous coronal restoration