Evidence map›Paper›PMID 27377440›Full record

ArticleJournal of endodontics2016

Microbial Ecosystem Analysis in Root Canal Infections Refractory to Endodontic Treatment.

Luiz Carlos Feitosa Henriques, Luciana Carla Neves de Brito, Warley Luciano Faria Tavares, Ricardo Palmier Teles, Leda Quércia Vieira, Flávia Rodrigues Teles, Antônio Paulino Ribeiro Sobrinho

Open access · greenAbstract read
In one paragraph

Article in Journal of endodontics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
8.0field-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

25 citing papers in PubMed, 66 citations in OpenAlex.

  1. Trial
  2. Arginine-loaded silica nanoparticles inhibit E. faecalis in root canals.Journal of materials science. Materials in medicine · 2026
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  14. An Atypical Case of MonomicrobialFrontiers in cellular and infection microbiology · 2022
    Article
  15. Article
  16. Article
  17. Article
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  19. Article
  20. Influence of microbiology on endodontic failure. Literature review.Medicina oral, patologia oral y cirugia bucal · 2019
    Review
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

7 authors at 2 institutions in 2 countries.

Luiz Carlos Feitosa HenriquesDepartamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Luciana Carla Neves de BritoFaculdade de Odontologia, Universidade de Itaúna, Itaúna, Minas Gerais, Brazil.
Warley Luciano Faria TavaresDepartamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Ricardo Palmier TelesPeriodontology, University of North Carolina at Chapel Hill School of Dentistry, Chapel Hill, North Carolina; Departamento de Bioquímica e Imunologia Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Leda Quércia VieiraDepartamento de Bioquímica e Imunologia Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Flávia Rodrigues TelesPeriodontology, University of North Carolina at Chapel Hill School of Dentistry, Chapel Hill, North Carolina; Departamento de Bioquímica e Imunologia Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Antônio Paulino Ribeiro SobrinhoDepartamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil. Electronic address: sobrinho.bhz@gmail.com.
Universidade Federal de Minas Gerais · BRUniversidade de Itaúna · BR

Funding

Targeted Cultivation of New Periodontal PathogensR01DE024767 · NIDCR · UNIV OF NORTH CAROLINA CHAPEL HILL · PI TELES, FLAVIA ROCHA · 2015 to 2018
$1.6M
NIDCR NIH HHS R01 DE024767
6 · The paper itself

Abstract

introductionThe purpose of this study was to combine multiple displacement amplification and checkerboard DNA-DNA hybridization to qualitatively and quantitatively evaluate the microbiota present in infections refractory to endodontic treatment.

methodsThe subjects of this study were 40 patients presenting with periapical lesions refractory to endodontic treatment. Samples were taken by scraping or filing root canal walls with a #10 K-type hand file. Sample DNA was amplified by multiple displacement amplification, and the levels of 107 bacterial taxa were analyzed by checkerboard DNA-DNA hybridization. The taxa were divided into 3 distinct microbial populations depending on their mean proportion in samples (% DNA probe counts ± standard error of the mean) as follows: dominant (≥3.0%), subdominant (>1.6%-3.0%), and residual (≤1.6%) populations. The significance of differences was determined using the Mann-Whitney test.

resultsThe taxa present with the highest mean proportions (constituting the dominant population) were Corynebacterium diphtheriae (8.03 ± 0.98), Porphyromonas gingivalis (5.42 ± 2.09), Streptococcus sobrinus (5.33 ± 0.69), and Stenotrophomonas maltophilia (4.72 ± 1.73). Among the subdominant population were Eubacterium saphenum (3.85 ± 1.06), Helicobacter pylori (3.16 ± 0.62), Dialister pneumosintes (3.12 ± 1.1), Clostridium difficile (2.74 ± 0.41), Enterobacter agglomerans (2.64 ± 0.54), Salmonella enterica (2.51 ± 0.52), Mobiluncus mulieris (2.44 ± 0.6), and Klebsiella oxytoca (2.32 ± 0.66). In the population of bacteria present at the lowest mean proportions (the residual population), Bacteroides ureolyticus (0.04 ± 0.01), Haemophilus influenzae (0.04 ± 0.02), and Prevotella oris (0.01 ± 0.01) were found at the lowest mean proportions. Enterococcus faecalis was detected in the residual population (0.52 ± 0.26).

conclusionsThe microbial climax community in teeth refractory to endodontic treatment not only harbors medically important species but also contains distinct microbial consortia present with different population levels.

Indexed as

Root Canal TherapyBacteriaDental Pulp CavityDental Pulp NecrosisDNA, BacterialDNA ProbesHumansMicrobiotaNucleic Acid HybridizationPeriapical DiseasesDNA, BacterialDNA ProbesCheckerboard DNA–DNA hybridizationendodontic treatment failuremultiple displacement amplificationroot canal–treated teeth

Identifiers

PMID27377440
PMCPMC5168558
OpenAlexW2474099336

What OpenQuestion holds

Textmetadata
LicenceTDM
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.