Complicated Root Canal Morphology of Mandibular Lateral Incisors Is Associated with the Presence of Distolingual Root in Mandibular First Molars: A Cone-beam Computed Tomographic Study in a Taiwanese Population

Yu Chiao Wu, Wan Chien Cheng, Ming Pang Chung, Chi Chun Su, Pei Wei Weng, Yi Wen Cathy Tsai, Ho Sheng Chiang, Hsiao Wen Yeh, Chi Hsiang Chung, Yi Shing Shieh, Ren Yeong Huang

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Abstract

Introduction The aim of this study was to assess the root canal configurations in permanent mandibular lateral incisors (PMLIs) and the correlation between the root canal configurations of PMLIs with the appearance of a distolingual root (DLR) in permanent mandibular first molars (PMFMs) using cone-beam computed tomographic (CBCT) imaging. Methods A total of 1200 CBCT images (300 patients) of PMFMs and PMLIs were investigated. The frequency and distribution of DLRs in PMFMs along with root canal configurations of PMLIs were assessed ipsilaterally and contralaterally. Multivariable logistic regression analysis was used to evaluate the correlation between the root canal configurations of PMLIs with the appearance of a DLR in PMFMs. Results The prevalence of PMFMs with a DLR was 24.3%, and the incidence of complicated root canal configurations in PMLIs was 25.0%. The most prevalent root canal systems of PMLIs were Vertucci types I (75%) and III (23.0%). The incidence of complicated root canal configurations in PMLIs was 19.5% in the non-DLR group (ie, no DLR was found on either side of the PMFMs), 33.3% in the unilateral DLR (Uni-DLR) group (ie, a DLR was found in 1 of the PMFMs [the left or right side] and a DLR was not found on the other PMFM), and 39.8% in the bilateral DLR (Bil-DLR) group (ie, a DLR was found in both the right and left PMFMs). After adjusting for categoric variables including sex, age, and side, the odds ratios for the frequency of complicated root canal configurations of PMLIs in the Uni-DLR and Bil-DLR groups compared with the non-DLR group were 2.12 (P =.003) and 2.707 (P <.001), respectively. Conclusions The simultaneous appearance of DLRs in PMFMs and complicated root canal configurations in PMLIs is prominent in Taiwanese individuals. Clinicians should be aware of the correlation between the anatomic variants of PMFMs and PMLIs, which are important before endodontic treatment.

Original languageEnglish
Pages (from-to)73-79.e1
JournalJournal of Endodontics
Volume44
Issue number1
DOIs
Publication statusPublished - Jan 1 2018

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Dental Pulp Cavity
Incisor
Population
Endodontics
Incidence
Logistic Models
Odds Ratio
Regression Analysis

Keywords

  • Cone-beam computed tomography
  • distolingual root
  • mandibular incisors
  • mandibular molar
  • root canal configuration

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Complicated Root Canal Morphology of Mandibular Lateral Incisors Is Associated with the Presence of Distolingual Root in Mandibular First Molars : A Cone-beam Computed Tomographic Study in a Taiwanese Population. / Wu, Yu Chiao; Cheng, Wan Chien; Chung, Ming Pang; Su, Chi Chun; Weng, Pei Wei; Cathy Tsai, Yi Wen; Chiang, Ho Sheng; Yeh, Hsiao Wen; Chung, Chi Hsiang; Shieh, Yi Shing; Huang, Ren Yeong.

In: Journal of Endodontics, Vol. 44, No. 1, 01.01.2018, p. 73-79.e1.

Research output: Contribution to journalArticle

Wu, Yu Chiao ; Cheng, Wan Chien ; Chung, Ming Pang ; Su, Chi Chun ; Weng, Pei Wei ; Cathy Tsai, Yi Wen ; Chiang, Ho Sheng ; Yeh, Hsiao Wen ; Chung, Chi Hsiang ; Shieh, Yi Shing ; Huang, Ren Yeong. / Complicated Root Canal Morphology of Mandibular Lateral Incisors Is Associated with the Presence of Distolingual Root in Mandibular First Molars : A Cone-beam Computed Tomographic Study in a Taiwanese Population. In: Journal of Endodontics. 2018 ; Vol. 44, No. 1. pp. 73-79.e1.
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abstract = "Introduction The aim of this study was to assess the root canal configurations in permanent mandibular lateral incisors (PMLIs) and the correlation between the root canal configurations of PMLIs with the appearance of a distolingual root (DLR) in permanent mandibular first molars (PMFMs) using cone-beam computed tomographic (CBCT) imaging. Methods A total of 1200 CBCT images (300 patients) of PMFMs and PMLIs were investigated. The frequency and distribution of DLRs in PMFMs along with root canal configurations of PMLIs were assessed ipsilaterally and contralaterally. Multivariable logistic regression analysis was used to evaluate the correlation between the root canal configurations of PMLIs with the appearance of a DLR in PMFMs. Results The prevalence of PMFMs with a DLR was 24.3{\%}, and the incidence of complicated root canal configurations in PMLIs was 25.0{\%}. The most prevalent root canal systems of PMLIs were Vertucci types I (75{\%}) and III (23.0{\%}). The incidence of complicated root canal configurations in PMLIs was 19.5{\%} in the non-DLR group (ie, no DLR was found on either side of the PMFMs), 33.3{\%} in the unilateral DLR (Uni-DLR) group (ie, a DLR was found in 1 of the PMFMs [the left or right side] and a DLR was not found on the other PMFM), and 39.8{\%} in the bilateral DLR (Bil-DLR) group (ie, a DLR was found in both the right and left PMFMs). After adjusting for categoric variables including sex, age, and side, the odds ratios for the frequency of complicated root canal configurations of PMLIs in the Uni-DLR and Bil-DLR groups compared with the non-DLR group were 2.12 (P =.003) and 2.707 (P <.001), respectively. Conclusions The simultaneous appearance of DLRs in PMFMs and complicated root canal configurations in PMLIs is prominent in Taiwanese individuals. Clinicians should be aware of the correlation between the anatomic variants of PMFMs and PMLIs, which are important before endodontic treatment.",
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author = "Wu, {Yu Chiao} and Cheng, {Wan Chien} and Chung, {Ming Pang} and Su, {Chi Chun} and Weng, {Pei Wei} and {Cathy Tsai}, {Yi Wen} and Chiang, {Ho Sheng} and Yeh, {Hsiao Wen} and Chung, {Chi Hsiang} and Shieh, {Yi Shing} and Huang, {Ren Yeong}",
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T1 - Complicated Root Canal Morphology of Mandibular Lateral Incisors Is Associated with the Presence of Distolingual Root in Mandibular First Molars

T2 - A Cone-beam Computed Tomographic Study in a Taiwanese Population

AU - Wu, Yu Chiao

AU - Cheng, Wan Chien

AU - Chung, Ming Pang

AU - Su, Chi Chun

AU - Weng, Pei Wei

AU - Cathy Tsai, Yi Wen

AU - Chiang, Ho Sheng

AU - Yeh, Hsiao Wen

AU - Chung, Chi Hsiang

AU - Shieh, Yi Shing

AU - Huang, Ren Yeong

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Introduction The aim of this study was to assess the root canal configurations in permanent mandibular lateral incisors (PMLIs) and the correlation between the root canal configurations of PMLIs with the appearance of a distolingual root (DLR) in permanent mandibular first molars (PMFMs) using cone-beam computed tomographic (CBCT) imaging. Methods A total of 1200 CBCT images (300 patients) of PMFMs and PMLIs were investigated. The frequency and distribution of DLRs in PMFMs along with root canal configurations of PMLIs were assessed ipsilaterally and contralaterally. Multivariable logistic regression analysis was used to evaluate the correlation between the root canal configurations of PMLIs with the appearance of a DLR in PMFMs. Results The prevalence of PMFMs with a DLR was 24.3%, and the incidence of complicated root canal configurations in PMLIs was 25.0%. The most prevalent root canal systems of PMLIs were Vertucci types I (75%) and III (23.0%). The incidence of complicated root canal configurations in PMLIs was 19.5% in the non-DLR group (ie, no DLR was found on either side of the PMFMs), 33.3% in the unilateral DLR (Uni-DLR) group (ie, a DLR was found in 1 of the PMFMs [the left or right side] and a DLR was not found on the other PMFM), and 39.8% in the bilateral DLR (Bil-DLR) group (ie, a DLR was found in both the right and left PMFMs). After adjusting for categoric variables including sex, age, and side, the odds ratios for the frequency of complicated root canal configurations of PMLIs in the Uni-DLR and Bil-DLR groups compared with the non-DLR group were 2.12 (P =.003) and 2.707 (P <.001), respectively. Conclusions The simultaneous appearance of DLRs in PMFMs and complicated root canal configurations in PMLIs is prominent in Taiwanese individuals. Clinicians should be aware of the correlation between the anatomic variants of PMFMs and PMLIs, which are important before endodontic treatment.

AB - Introduction The aim of this study was to assess the root canal configurations in permanent mandibular lateral incisors (PMLIs) and the correlation between the root canal configurations of PMLIs with the appearance of a distolingual root (DLR) in permanent mandibular first molars (PMFMs) using cone-beam computed tomographic (CBCT) imaging. Methods A total of 1200 CBCT images (300 patients) of PMFMs and PMLIs were investigated. The frequency and distribution of DLRs in PMFMs along with root canal configurations of PMLIs were assessed ipsilaterally and contralaterally. Multivariable logistic regression analysis was used to evaluate the correlation between the root canal configurations of PMLIs with the appearance of a DLR in PMFMs. Results The prevalence of PMFMs with a DLR was 24.3%, and the incidence of complicated root canal configurations in PMLIs was 25.0%. The most prevalent root canal systems of PMLIs were Vertucci types I (75%) and III (23.0%). The incidence of complicated root canal configurations in PMLIs was 19.5% in the non-DLR group (ie, no DLR was found on either side of the PMFMs), 33.3% in the unilateral DLR (Uni-DLR) group (ie, a DLR was found in 1 of the PMFMs [the left or right side] and a DLR was not found on the other PMFM), and 39.8% in the bilateral DLR (Bil-DLR) group (ie, a DLR was found in both the right and left PMFMs). After adjusting for categoric variables including sex, age, and side, the odds ratios for the frequency of complicated root canal configurations of PMLIs in the Uni-DLR and Bil-DLR groups compared with the non-DLR group were 2.12 (P =.003) and 2.707 (P <.001), respectively. Conclusions The simultaneous appearance of DLRs in PMFMs and complicated root canal configurations in PMLIs is prominent in Taiwanese individuals. Clinicians should be aware of the correlation between the anatomic variants of PMFMs and PMLIs, which are important before endodontic treatment.

KW - Cone-beam computed tomography

KW - distolingual root

KW - mandibular incisors

KW - mandibular molar

KW - root canal configuration

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