Worldwide Assessment of the Mandibular First Molar Second Distal Root and Root Canal: A Cross-sectional Study with Meta-analysis

Martins, Jorge N.R.; Nole, Christian; Ounsi, Hani F.; Parashos, Peter; Plotino, Gianluca; Ragnarsson, Magnús F.; Aguilar, Rosa Elena Méndez; Santiago, Fábio; Seedat, Hussein C.; Vargas, Walter; Zuben, Murilo von; Zhang, Yuerong; Alfawaz, Hussam; Alkhawas, Moataz-Bellah A.M.; Altaki, Zaher; Berti, Luiza; Bóveda, Carlos; Cassim, Imran; Chaniotis, Angelos; Flynn, Daniel; González, José A.; Kottoor, Jojo; Monroe, Adam; Silva, Emmanuel João Nogueira Leal; Versiani, Marco Aurélio

doi:10.1016/j.joen.2021.11.009

Cited by 20 publications

(17 citation statements)

References 33 publications

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“…This finding was slightly superior to the upper bound of the prevalence of three-rooted PMFM in Europe of our meta-analysis. As a result, this finding from 214 White patients of Melbourne and a single-center study [ 101 ] could not be generalizable to the whole population of the Australian continent. Additionally, the aboriginal population of Australia should not be neglected to consider.…”

Section: Discussionmentioning

confidence: 86%

“…As a result, we postulate that the prevalence of three-rooted PMFM in Australians may not be seen different from that of the Western world. Consequently, a recent worldwide cross-sectional study [ 101 ] with a meta-analysis found that the prevalence of two distal roots in PMFM comprised 4% of the White Australian population. This finding was slightly superior to the upper bound of the prevalence of three-rooted PMFM in Europe of our meta-analysis.…”

Section: Discussionmentioning

confidence: 99%

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Three-Rooted Permanent Mandibular First Molars: A Meta-Analysis of Prevalence

Aung

Myint

2022

International Journal of Dentistry

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Introduction. Although numerous amounts of high-level evidence were present, they solely emphasized the tooth-level prevalence of three-rooted permanent mandibular first molar. Global patient-level prevalence and bilateral symmetrical distribution of this type of teeth were needed to be tackled across the world. The research question was “What is the global prevalence of three-rooted permanent mandibular first molars?” Materials and Methods. In vivo epidemiological studies undergone with Cone Beam Computed Tomography (CBCT) were eligible. The proportions of the prevalence of three-rooted permanent mandibular first molars were presented in the forest plots by random effect model. The calculation was performed with MetaXL version 5.3. Subgroup analysis, sensitivity analysis, and publication bias method were also calculated. Results. Seventy-two studies from 31 countries were selected for both qualitative and quantitative analyses. 26302 patients and 37994 permanent mandibular first molars were included in the analysis. 9% of permanent mandibular first molars all over the world demonstrated 3 roots. These three-rooted teeth were found in 10% of the world population, more than 45% of which revealed bilateral symmetry of that anatomy. Right-side dominance and no sexual dimorphism were seen in the distribution of three-rooted permanent mandibular first molars. Global tooth-level prevalence of Radix Entomolaris and Radix Paramolaris was 12% and 0.1%, respectively. Conclusion. The prevalence of three-rooted permanent mandibular first molars (PMFMs) was influenced by different geographical locations across the world and also by widespread habitation of the Mongoloid descent. The authors postulate that globalization, together with blending among ethnicities, may have a great impact on the reduction or accentuation of the anatomical significance in some populations.

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Three-Rooted Permanent Mandibular First Molars: A Meta-Analysis of Prevalence

Aung

Myint

2022

International Journal of Dentistry

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“…A most recent technology which provide 3-D radiographic image was cone beam computed tomography CBCT. It has a superior image quality in relation to conventional digital radiograph and give an accurate measurement for direction of the curvature of RE and position of its canal opening in relation to other canals in mandibular first molar for anatomical analysis (16)(17)(18)(19) . Hence digital perapical radiographs were used for initial monitoring of the existence of RE & CBCT were used for confirmation and detecting a variation in the position of RE.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Three Rooted Mandibular First Molars in Egyptian population: Cross-sectional Study

housiny

Farid

2022

Egyptian Dental Journal

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Purpose: of this cross-sectional study was to determine the proportion of permanent mandibular first molar teeth with three roots among the Egyptian population. Material and methods:In total, 479 digital periapical radiographs were screened & evaluated to get 312 samples for the study. The 312 studied subject,137 male and 175 females, aged range from 19 to 70 years. Symmetry, gender, and frequency of existence of third root in mandibular first molars were assessed and analyzed using chi square test. Two examiner evaluated the radiographic characteristics of the radix entomolaris (RE). Cohen kappa test was used to assess intraexaminer variability. Results:The prevalence of RE was 2.91 % (4/10)in male, 3.42% (6/10) in female. Total Prevalence of RE in mandibular first molar was 3.12 %. There was no significant difference regarding to gender as p = 0.862. The Prevalence RE showed no statistically significant regarding to the position either unilateral or Bilateral (p=0.342) Conclusion:The overall prevalence of the RE is 3.12% in the mandibular first in the Egyptian population.

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“…It is well known that the human dentition presents a wide range of anatomical variations in each tooth type that can be greatly influenced by ethnicity, physiological and pathological factors 9 . As a consequence, root and canal morphology vary greatly between populations, within populations and even within the same individual 9,12–14 . In Endodontics, the morphologies of both the root and root canal system carry remarkable importance, as they wield a substantial influence over clinical procedures and, by extension, treatment outcomes.…”

Section: Introductionmentioning

confidence: 99%

“…9 As a consequence, root and canal morphology vary greatly between populations, within populations and even within the same individual. 9,[12][13][14] In Endodontics, the morphologies of both the root and root canal system carry remarkable importance, as they wield a substantial influence over clinical procedures and, by extension, treatment outcomes. As shown in previous studies, failure to adequately address all canals and their complexities can result in treatment failure.…”

Section: Introductionmentioning

confidence: 99%

Anatomical complexities affecting root canal preparation: a narrative review

Versiani,

Martins,

Ordinola‐Zapata

2023

Australian Dental Journal

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A fundamental aspect of the Endodontic field is the knowledge of root canal anatomy. Using a variety of techniques, the internal and external anatomy of teeth have been extensively investigated throughout the past century. Recent improvements in three‐dimensional computed tomography have enabled more detailed evaluations of root canal morphology in both clinical and laboratory settings. Essentially, researches have unveiled that the root canal constitutes a complex system, comprising not only the main root canal but also lateral components, including isthmuses, fins, accessory canals and apical ramifications. Undoubtedly, this intricate morphology poses a significant challenge when it comes to the process of shaping, cleaning and disinfecting the root canal system. This article aims to explore the anatomical aspects of the root canal system that impact the chemomechanical procedures.

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Worldwide Assessment of the Mandibular First Molar Second Distal Root and Root Canal: A Cross-sectional Study with Meta-analysis

Cited by 20 publications

References 33 publications

Three-Rooted Permanent Mandibular First Molars: A Meta-Analysis of Prevalence

Three-Rooted Permanent Mandibular First Molars: A Meta-Analysis of Prevalence

Prevalence of Three Rooted Mandibular First Molars in Egyptian population: Cross-sectional Study

Anatomical complexities affecting root canal preparation: a narrative review

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