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Purpose <p>C-shaped root morphology features narrow canals, root concavity, and thin dentinal walls, necessitating careful treatment planning and clinical expertise for effective cleaning and shaping.</p> Methods <p>This study included 401 total CBCT images of mandibular second molars with C-shaped root canals. Root morphology, root length, dentin thickness, and the location, length, width, and depth of the radicular groove were all analyzed with the Planmeca Romexis 3.1.0.R software. Fan Bing’s C-shaped root canal classification method was used to classify all data, and SPSS was used for statistical analyses.</p> Results <p>These analyses revealed significant differences in radicular groove for mandibular second molars with C-shaped root canals across different root canal cross-sections. The mean respective root and radicular groove lengths for the analyzed molars were 11.64 ± 1.42&#xa0;mm, and 9.34 ± 1.42&#xa0;mm, and coronal, middle, and apical radicular groove incidence rates were 94.51%, 100%, and 98.75% respectively. The observed radicular grooves were widest at the coronal level and deepest at the middle level, while dentin was thinnest at the apical level.</p> Conclusions <p>This study offers an overview of the radicular groove characteristics in mandibular second molars with C-shaped root canals, providing anatomical data to assist clinicians in root canal treatment.</p>

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Anatomical features of mandibular second molar C-shaped root canals in a Chinese population: a CBCT analysis

  • 期刊论文

  • 发表日期：

    2025年4月5日

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  • Wenwei Hong,
  • Jinzan Zhu,
  • Liuhui Liu,
  • Limin Zhang,
  • Haifeng Tang

摘要

Purpose

C-shaped root morphology features narrow canals, root concavity, and thin dentinal walls, necessitating careful treatment planning and clinical expertise for effective cleaning and shaping.

Methods

This study included 401 total CBCT images of mandibular second molars with C-shaped root canals. Root morphology, root length, dentin thickness, and the location, length, width, and depth of the radicular groove were all analyzed with the Planmeca Romexis 3.1.0.R software. Fan Bing’s C-shaped root canal classification method was used to classify all data, and SPSS was used for statistical analyses.

Results

These analyses revealed significant differences in radicular groove for mandibular second molars with C-shaped root canals across different root canal cross-sections. The mean respective root and radicular groove lengths for the analyzed molars were 11.64 ± 1.42 mm, and 9.34 ± 1.42 mm, and coronal, middle, and apical radicular groove incidence rates were 94.51%, 100%, and 98.75% respectively. The observed radicular grooves were widest at the coronal level and deepest at the middle level, while dentin was thinnest at the apical level.

Conclusions

This study offers an overview of the radicular groove characteristics in mandibular second molars with C-shaped root canals, providing anatomical data to assist clinicians in root canal treatment.