Evidence map›Paper›PMID 42688899›Full record

ArticleJournal of dental sciences2026

Presence of second mesiobuccal canal of permanent maxillary first molars is related to the existence of multiple roots in permanent maxillary first premolars: A cone-beam computed tomographic study in a Taiwanese population.

Zi-Jun Dai, Yi-Jie Chen, Hsin-Jui Liou, Tien-Hung Hsieh, Yi-Chen Chung, Che-Yuan Lin, Ying-Wu Chen, Ren-Yeong Huang, Yi-Shing Shieh, Yu-Chiao Wu

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In one paragraph

Article in Journal of dental sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Zi-Jun DaiDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Yi-Jie ChenDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Hsin-Jui LiouDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Tien-Hung HsiehDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Yi-Chen ChungDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Che-Yuan LinDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Ying-Wu ChenDepartment of Periodontology, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Ren-Yeong HuangDepartment of Periodontology, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Yi-Shing ShiehDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.
Yu-Chiao WuDepartment of Operative Dentistry and Endodontics, College of Oral Medicine, Tri-Service General Hospital and National Defense Medical University, Taipei, Taiwan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background/purpose: Understanding root and canal morphology is critical for successful endodontic treatment. Detecting predictors of a second mesiobuccal (MB2) canal in permanent maxillary first molars (PMFMs) may improve diagnostic accuracy. This study examined the relationship between root number of permanent maxillary first premolars (PMFPs) and MB2 occurrence in PMFMs in a Taiwanese population. Materials and methods: CBCT scans from 645 patients were reviewed, and 188 met the inclusion criteria, yielding 752 teeth (376 PMFPs, 376 PMFMs). Root number and canal morphology were classified using Vertucci's system. MB2 prevalence and bilateral symmetry were assessed. Associations between PMFP root number and MB2 occurrence were analyzed with chi-square tests and multivariable logistic regression adjusted for sex, age, and side. Results: Among PMFPs, 60.9 % had one root, 37.5 % had two roots, and 1.6 % had three roots. In single-rooted PMFPs, the most common configurations were Types I, III, IV, and II. In PMFMs, the mesiobuccal root most frequently showed Type I (42.0 %), followed by Type IV (30.8 %) and Type II (23.6 %). Males had a higher prevalence of multi-rooted PMFPs and MB2 canals than females. Logistic regression revealed that multiple-rooted PMFPs were independently associated with MB2 occurrence in PMFMs, with an adjusted odds ratio of 2.081 ( Conclusion: Multiple-rooted PMFPs were strongly correlated with MB2 occurrence in PMFMs. PMFP morphology may serve as a predictive indicator for MB2 detection, enhancing diagnosis and treatment planning while no CBCT usage.

Indexed as

CBCTMaxillary first molarMaxillary first premolarMB2Multiple roots

Identifiers

PMID42688899
PMCPMC13535955

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.