Endodontic Management of a Mandibular Molar with Radix Entomolaris and Severe Canal Curvature: A Case Report

The fundamental objective of endodontic therapy is thorough chemo-mechanical disinfection and hermetic obturation while preserving the original canal anatomy. However, root canal curvatures and dilacerations present substantial clinical challenges, predisposing to iatrogenic complications including canal transportation, ledging, apical zipping, and instrument separation. Recent innovations in flexible nickel-titanium (NiTi) metallurgy, enhanced irrigation protocols, and magnification have markedly improved the predictability of treating severely curved systems. This case report documents the clinical management of two cases presenting with severe canal curvatures successfully treated with controlled memory nickel titanium instruments and conservative glide-path protocols. CBCT is useful in endodontics for aiding in the identification of essential anatomic structures and determination of radius and angle of root canal curvature which is linked to fracture of the instrument. Original canal curvatures were strictly maintained without procedural accidents, resulting in favorable clinical and radiographic outcomes. Thorough knowledge of canal anatomy, vigilant glide-path management, and appropriate instrument selection remain paramount for mitigating procedural errors and ensuring predictable long-term endodontic success.