In this clinical case profile, Dr. Jianing (Jenny) He demonstrates how to streamline the chemomechanical preparation of complex root canal systems using the reciprocating, single-file EdgeOne Blaze Utopia system. The case highlights a non-surgical root canal treatment (NSRCT) on a maxillary first molar presenting with pulpal necrosis, asymptomatic apical periodontitis, and a severely curved mesiobuccal root. By utilizing the system’s regressive taper design and safer reciprocating motion, the procedure successfully minimized the risk of file separation and preserved crucial cervical dentin. Ultimately, the case illustrates how integrating modern, minimally invasive file technology into a meticulous clinical protocol simplifies endodontic workflows and achieves highly predictable, safe outcomes—even in anatomically challenging canals.