ABSTRACT
Background: When the preparation and obturation are both shorter than the desired working length, an underfill occurs. The disease could result from persistent bacteria and a lack of apical seal. Therefore, retreatment and removal of underfilled gutta percha are suggested. Without any periapical discomfort, the procedure may be completed in a single visit. This case presents a previously treated and normal periapical second lower left premolar that was retreated non-surgically in a single visit. Case report: A 59-year-old female patient came to replace her old amalgam filling without any history of pain or discomfort. Clinical examination showed an extensive amalgam filling on the mesial occlusal distal (MOD) without any pain on percussion and mobility. Radiograph examination showed an underfilled canal with normal periapical. Case management: A single-visit retreatment was carried and gutta-percha was removed using a solvent and retreatment file. The canal was prepared using #30/.04 rotary file. Irrigation using sodium hypochlorite, ethylenediaminetetraacetic acid, and chlorhexidine gluconate with sonic activation. Obturation was done by using a warm vertical compaction technique during the same appointment. The tooth was restored with fiber post, core, and hybrid ceramic crown. Conclusion: Apical seal is known to be important to prevent residual disease-causing bacteria for a long-term favorable outcome. A single-visit treatment has shorter chairside time without a significantly different success rate compared to multi-visit treatment.
