Evidence map›Paper›PMID 33400563›Full record

ArticleDento maxillo facial radiology2021

Influence of CBCT-based volumetric distortion and beam hardening artefacts on the assessment of root canal filling quality in isthmus-containing molars.

Clarissa Teles Rodrigues, Reinhilde Jacobs, Karla Faria Vasconcelos, Paul Lambrechts, Izabel Regina Fisher Rubira-Bullen, Hugo Gaêta-Araujo, Christiano Oliveira-Santos, Marco Antonio Hungaro Duarte

Open access · bronzeAbstract read
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In one paragraph

Article in Dento maxillo facial radiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
5.6field-weighted citation impact, top 3% 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

24 citing papers in PubMed, 39 citations in OpenAlex.

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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 3 countries.

Clarissa Teles RodriguesDepartment of Restorative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.
Reinhilde JacobsDepartment of Imaging and Pathology, Faculty of Medicine, OMFS IMPATH Research Group, KU Leuven, Leuven, Belgium.
Karla Faria VasconcelosDepartment of Imaging and Pathology, Faculty of Medicine, OMFS IMPATH Research Group, KU Leuven, Leuven, Belgium.
Paul LambrechtsDepartment of Oral Health Sciences, Endodontology, KU Leuven and Dentistry, University Hospitals Leuven, Leuven, Belgium.
Izabel Regina Fisher Rubira-BullenDepartment of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.
Hugo Gaêta-AraujoDivision of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil.
Christiano Oliveira-SantosDepartment of Stomatology, Public Oral Health, and Forensic Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.
Marco Antonio Hungaro DuarteDepartment of Restorative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.
Universidade de São Paulo · BRKU Leuven · BEUniversidade Estadual de Campinas (UNICAMP) · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo evaluate the influence of artefacts in cone beam CT (CBCT) images of filled root canals in isthmus-containing molars.

methods10 teeth presenting canals with an isthmus were instrumented and filled with a thermoplasticised obturation technique. The teeth were scanned using a micro-CT device and two CBCT devices: 3D Accuitomo 170 (ACC) and NewTom VGi evo (NT), with different acquisition protocols: larger and smaller voxel size. Three examiners assessed the CBCT images for: (1) detection of filling voids; (2) assessment of under- or overestimation of the filling material and (3) resemblance of CBCT images to the reference standard. Analyses of Task 1 yielded accuracy, sensitivity and specificity for detection of filling voids. For tasks 2 and 3, statistical analysis was performed using Wilcoxon test. The level of significance was set at

resultsFor Task 1, ACC showed higher sensitivity, whereas NT presented higher specificity. No significant difference was found between the protocols in ACC, however, for NT, differences between protocols were significant for all diagnostic values. In Task 2, visualisation of the filling was overestimated for NT, while for ACC, underestimation was observed. For Task 3, images with smaller voxel size were more similar to the reference image, for both CBCT devices.

conclusionsDifferent artefacts compromise the detection of filling voids on CBCT images of canals in mandibular molars with isthmus. ACC and NT present rather similar diagnostic accuracy, even though artefact expression remains device-specific.

Indexed as

ArtifactsSpiral Cone-Beam Computed TomographyCone-Beam Computed TomographyDental Pulp CavityHumansMolarRoot Canal ObturationArtefactsCone-beam computed tomographyMicrocomputed tomographyRoot canal obturation.

Identifiers

PMID33400563
PMCPMC8231682
OpenAlexW3120769076

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Registered trials

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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.