Association between the presence of distolingual root in mandibular first molars and the presence of C-shaped mandibular second molars: a CBCT study in a Taiwanese population

Yu Chiao Wu, Wen Song Su, Lian Ping Mau, Wan Chien Cheng, Pei Wei Weng, Yi Wen Cathy Tsai, Chi Chun Su, Ho Sheng Chiang, Jarshen Lin, Yi Shing Shieh, Ren Yeong Huang

Research output: Contribution to journalArticlepeer-review

Abstract

OBJECTIVES: The purpose of this study was to assess the prevalence of C-shaped canals in permanent mandibular second molars (SMs) and to determine whether its appearance was associated with the presence of distolingual root (DLR) in permanent mandibular first molars (FMs). METHOD AND MATERIALS: Three hundred and eighty patients were qualified for evaluation of their FMs and SMs using cone beam computed tomography. The prevalence, distribution pattern, external root morphology, and the internal root canal anatomy of the examined molars were recorded and analyzed. Furthermore, the association between the root canal configurations of SMs and the appearance of DLR in FMs was also assessed. RESULTS: The prevalence of SMs with C-shaped root canals was 44.7%. The most common root canal configuration type of the one-rooted SMs with C-shaped anatomy was C3 (45.6%), followed by C2 and C1. The frequency of C-shaped canals in SMs was 45.4% in Non-DLR group, 52.8% in unilateral DLR group, and 33.9% in bilateral DLR group, respectively. Moreover, the prevalence of C-shaped root canals in SMs with the presence of bilateral DLRs in FMs was significantly lowered. CONCLUSION: The association between the presence of DLR in FMs and C-shaped canal configurations in neighboring SMs was surveyed, and the prevalence of C-shaped root canals in SMs with the presence of bilateral DLRs in FMs was found to be significantly lowered.

Original languageEnglish
Pages (from-to)798-807
Number of pages10
JournalQuintessence international (Berlin, Germany : 1985)
Volume51
Issue number10
DOIs
Publication statusPublished - 2020

Keywords

  • C-shaped root canal configuration
  • CBCT
  • distolingual root
  • mandibular first molars
  • mandibular second molars

ASJC Scopus subject areas

  • Dentistry(all)

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