Management of a Fan’s Type IV C-Shaped Canal in a Mandibular First Molar: Literature Review and Case Report

Authors

  • Vivek Devidas Mahale
  • Vigneshwar T MDS

Keywords:

C-shaped canal, mandibular first molar, Fan’s classification, CBCT, retreatment, endodontics

Abstract

C-shaped canals represent one of the most complex anatomical variations encountered in mandibular molars, often posing significant challenges for diagnosis and treatment. They occur due to root fusion, creating irregular cross-sections with fins and webs that complicate cleaning, shaping, and obturation. Although more prevalent in mandibular second molars, C-shaped canals have also been reported in mandibular first molars, where their occurrence is relatively rare. This article presents the nonsurgical retreatment of a mandibular first molar (#36) with Fan’s Type IV C-shaped canal morphology, six years after the initial root canal therapy. A comprehensive literature review is provided, highlighting the prevalence, classification, diagnostic tools, and treatment strategies associated with C-shaped canals. The present case demonstrates how careful diagnosis, the use of cone-beam computed tomography (CBCT), and modern retreatment techniques can lead to favorable outcomes in managing this anatomical variation.

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Published

2025-08-28

How to Cite

1.
Devidas Mahale V, T MDS V. Management of a Fan’s Type IV C-Shaped Canal in a Mandibular First Molar: Literature Review and Case Report. J Neonatal Surg [Internet]. 2025Aug.28 [cited 2025Sep.20];14(9S):1046-50. Available from: https://jneonatalsurg.com/index.php/jns/article/view/9026

Issue

Vol. 14 No. 9S (2025): Journal of Neonatal Surgery

Section

Original Article

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