Ling-Chang  Shen,Wan-Chuen  Liao,O. A.  Peters,
Nonsurgical Root Canal Treatment of a Mandibular First Premolar with Taurodontism Managed with Minimally Invasive Endodontics: A Case Report
Case Reports in Dental and Oral Biology
2020

http://dx.doi.org/10.31487/j.CRDOB.2020.01.02
https://www.sciencerepository.org/nonsurgical-root-canal-treatment-of-a-mandibular-first-premolar_CRDOB-2020-1-102 
Abstract: A 67-year-old male patient was referred for further treatment of a mandibular left first premolar. The tooth
presented with slight percussion tenderness and the periodontal probing depth was normal. There was no
soft tissue swelling. The radiographic image exhibited a temporary restoration in the previously initiated
access cavity of the mandibular left first premolar. The diagnosis of the mandibular left first premolar was
previously initiated therapy associated with symptomatic apical periodontitis. The tooth presented four root
canals and the characteristics of taurodontism. Two buccal root canals bifurcated at the apical third. The
pulpal floor was examined under a dental operating microscope and four canal orifices were identified.
TruNatomy Glider was used for glide path preparation. TruNatomy Prime file was selected for final root
canal preparation in order to maximally preserve the radicular dentin. Root canal irrigation was achieved by
using RC-Prep and 2.5% NaOCl between each file application. Canal blockage was avoided by multiple
recapitulations with K-files (#10) between changing each rotary file. Obturation of the canals were
performed by using TruNatomy Conform Fit® Gutta-Percha cones and AH Plus® root canal sealer via the
warm lateral condensation technique. CBCT was arranged for confirmation after root canal treatment of the
mandibular left first premolar and showed a good outcome. The clinical procedures and instruments could
provide the practitioners for reference while managing such a difficult case.Keywords: Canal bifurcation, mandibular first premolar, minimally invasive endodontics, nonsurgical root canal treatment, TruNatomy, taurodontism