Evidence map›Paper›PMID 33289048›Full record

ArticleClinical oral investigations2021

Is MRI a viable alternative to CT/CBCT to identify the course of the inferior alveolar nerve in relation to the roots of the third molars?

Florian Beck, Stephanie Austermann, Kristina Bertl, Christian Ulm, Stefan Lettner, Andrea Toelly, André Gahleitner

Open access · hybridAbstract read
In one paragraph

Article in Clinical oral investigations, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.4field-weighted citation impact, top 20% 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

10 citing papers in PubMed, 17 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

7 authors at 2 institutions in 2 countries.

Florian BeckDivision of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria. florian.beck@meduniwien.ac.at.ORCID http://orcid.org/0000-0002-1662-2926
Stephanie AustermannDivision of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Kristina BertlDivision of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Christian UlmDivision of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Stefan LettnerKarl Donath Laboratory for Hard Tissue and Biomaterial Research, Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Andrea ToellyDepartment of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria.
André GahleitnerDepartment of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria.
Medical University of Vienna · ATLund University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo assess the reliability of judging the spatial relation between the inferior alveolar nerve (IAN) and mandibular third molar (MTM) based on MRI or CT/CBCT images.

methodsAltogether, CT/CBCT and MRI images of 87 MTMs were examined twice by 3 examiners with different degrees of experience. The course of the IAN in relation to the MTM, the presence/absence of a direct contact between IAN and MTM, and the presence of accessory IAN were determined.

resultsThe IAN was in > 40% of the cases judged as inferior, while an interradicular position was diagnosed in < 5% of the cases. The overall agreement was good (κ = 0.72) and any disagreement between the imaging modalities was primarily among the adjacent regions, i.e., buccal/lingual/interradicular vs. inferior. CT/CBCT judgements presented a very good agreement for the inter- and intrarater comparison (κ > 0.80), while MRI judgements showed a slightly lower, but good agreement (κ = 0.74). A direct contact between IAN and MTM was diagnosed in about 65%, but in almost 20% a disagreement between the judgements based on MRI and CT/CBCT was present resulting in a moderate overall agreement (κ = 0.60). The agreement between the judgements based on MRI and CT/CBCT appeared independent of the examiner's experience and accessory IAN were described in 10 cases in MRI compared to 3 cases in CT/CBCT images.

conclusionsA good inter- and intrarater agreement has been observed for the assessment of the spatial relation between the IAN and MTM based on MRI images. Further, MRI images might provide advantages in the detection of accessory IAN compared to CT/CBCT. CLINICAL RELEVANCE: MRI appears as viable alternative to CT/CBCT for preoperative assessment of the IAN in relation to the MTM.

Indexed as

Spiral Cone-Beam Computed TomographyTooth, ImpactedCone-Beam Computed TomographyHumansMagnetic Resonance ImagingMandibleMandibular NerveMolar, ThirdRadiography, PanoramicReproducibility of ResultsTooth ExtractionCone beam computed tomographyMagnetic resonance imagingMandibular nerveMultidetector computed tomographyOral surgeryThird molar

Identifiers

PMID33289048
PMCPMC8137481
OpenAlexW3110729026

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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.