The concept of single-visit root canal treatment (RCT) is based on the "buried hypothesis," which posits that the extensive release of microorganisms during cleaning and shaping procedures and their subsequent entombment by root canal filling materials deprive them of essential factors necessary for survival. This hypothesis suggests that by completing the entire RCT process in a single session, the microbial load is significantly reduced and effectively sealed within the root canal system, minimizing the chances of bacterial survival and reinfection. Therefore, single-visit RCT aims to comprehensively disinfect and seal the root canal system in one appointment, potentially enhancing treatment outcomes and reducing patient visits.