Evidence map›Paper›PMID 32049137›Full record

ArticleJournal of applied oral science : revista FOB2020

Micro-computed tomographic assessment of the variability and morphological features of root canal system and their ramifications.

Jardel Francisco Mazzi-Chaves, Yara Terezinha Corrêa Silva-Sousa, Graziela Bianchi Leoni, Alice Corrêa Silva-Sousa, Lucas Estrela, Carlos Estrela, Reinhilde Jacobs, Manoel Damião de Sousa-Neto

Open access · diamondAbstract read
In one paragraph

Article in Journal of applied oral science : revista FOB, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 2 pooled it
7.6field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

30 citing papers in PubMed, 2 syntheses or guidelines pooled it, 52 citations in OpenAlex.

  1. Pooled it
  2. Root Canal Morphology and Configuration of the Mandibular Canine: A Systematic Review.International journal of environmental research and public health · 2021
    Pooled it
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  20. Estimation of root canal conicity of deciduous canines evaluated by nano-CT.European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry · 2023
    Article
4 · The record

Corrections and comments

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

8 authors at 3 institutions in 2 countries.

Jardel Francisco Mazzi-ChavesUniversidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Odontologia Restauradora, Ribeirão Preto, São Paulo, Brasil.ORCID http://orcid.org/0000-0002-9889-1790
Yara Terezinha Corrêa Silva-SousaUniversidade de Ribeirão Preto, Faculdade de Odontologia, Ribeirão Preto, São Paulo, Brasil.ORCID http://orcid.org/0000-0002-7671-1656
Graziela Bianchi LeoniUniversidade de Ribeirão Preto, Faculdade de Odontologia, Ribeirão Preto, São Paulo, Brasil.ORCID http://orcid.org/0000-0002-3923-3683
Alice Corrêa Silva-SousaUniversidade de Ribeirão Preto, Faculdade de Odontologia, Ribeirão Preto, São Paulo, Brasil.ORCID http://orcid.org/0000-0002-9931-0935
Lucas EstrelaUniversidade Federal de Goiás, Faculdade de Odontologia, Goiânia, Goiás, Brasil.ORCID http://orcid.org/0000-0003-1244-4015
Carlos EstrelaUniversidade Federal de Goiás, Faculdade de Odontologia, Goiânia, Goiás, Brasil.ORCID http://orcid.org/0000-0002-1488-0366
Reinhilde JacobsUniversity of Leuven, Faculty of Medicine, Departament of Imaging and Pathology, OMFS IMPATH Research Group, Leuven, Belgium.ORCID http://orcid.org/0000-0002-3461-0363
Manoel Damião de Sousa-NetoUniversidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Odontologia Restauradora, Ribeirão Preto, São Paulo, Brasil.ORCID http://orcid.org/0000-0002-7696-7600
Universidade de Ribeirão Preto · BRUniversidade Federal de Goiás · BRKU Leuven · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThis study assessed the incidence and variability features of root canals system (RCS) and their ramifications according to Pucci & Reig (PR) (1944) and the American Association of Endodontists (AAE) (2017) by micro-computed tomography (μCT). METHODOLOGY: 500 representative extracted human teeth of each tooth group (n=50) (maxillary/mandibular central and lateral incisors, canines, first and second premolars and molars) were scanned by μCT with a resolution of 26.70 μm. The reconstructed cross-sections images and the visualization of the continuous slices in the transversal axis were performed using DataViewer software. RCS were classified according to Pucci & Reig (main canal, collateral canal, lateral canal, secondary canal, accessory canal, intercanal, recurrent canal) and AAE (main canal, accessory canal, lateral canal). The apical deltas were assessed for both classifications. The prevalence of apical deltas was evaluated using the Chi-squared test (p<0.05).

resultsAccording to PR, a higher incidence of lateral canals was observed in maxillary canines (10%), central incisors (8%) and first premolars (6%). Using AAE, the highest incidence of lateral canals was observed in the mandibular first premolars (85%), first and second molars (84%), lateral incisors (67%), canines (59%), and in maxillary first premolars (52%). Regarding accessory canals, the PR showed a frequency in 2% of the maxillary lateral incisors and maxillary and mandibular first premolars and 3% of mandibular first and second molars. On the other hand, the AAE showed the highest incidence of accessory canals in 86% of the maxillary first premolars, 71% in mandibular lateral incisors, 69% in mandibular first premolars, 65% in mandibular canines, and 56% in maxillary canines. The PR showed the lowest incidence of apical deltas for all dental groups when compared with AAE (p=0.004). Interestingly, distal canals in maxillary molars showed a significant discrepancy between classifications (p=0.027).

conclusionsμCT enabled accurately describing the RC system and related ramifications, adding to the PR and AAE classifications, with some discrepancies reported for maxillary molars. Clinical Relevance This μCT study enabled a thorough description of the variability among root canals and their ramifications, including clinically relevant details on the presence and location of lateral canals and accessories in all human tooth groups, beyond the currently existing classification systems.

Indexed as

Dental Pulp CavityHumansImaging, Three-DimensionalMandibleMaxillaReference ValuesStatistics, NonparametricTooth ApexX-Ray Microtomography

Identifiers

PMID32049137
PMCPMC6999120
OpenAlexW3004769142

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.