Evidence map›Paper›PMID 42659411›Full record

ArticleBrazilian dental journal2026

Evaluation of light output from light-curing units used in a public oral health service in Brazil.

Laryssa Silva da Cunha, Airin Karelys Avendaño Rondon, Maryuri Del Carmen Macias Bautista, Ianca Daniele Oliveira de Jesus, Guilherme Mendonça Benoni, Gisele Rodrigues da Silva, Richard Bengt Price, Carlos José Soares

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Brazilian dental journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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.

Laryssa Silva da CunhaDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0001-7697-2373
Airin Karelys Avendaño RondonDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0002-3185-9622
Maryuri Del Carmen Macias BautistaDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0009-0000-5502-610X
Ianca Daniele Oliveira de JesusDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0002-6369-1166
Guilherme Mendonça BenoniDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0009-0009-2015-6647
Gisele Rodrigues da SilvaDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0002-9358-1339
Richard Bengt PriceDepartment Dental Clinical Sciences and School of Biomedical Engineering, Dalhousie University, Nova Scotia, Halifax, Canada.ORCID http://orcid.org/0000-0001-6479-1436
Carlos José SoaresDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0002-8830-605X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This observational field study aimed to evaluate the radiant power (mW), emission spectra (mW/cm²/nm), irradiance (mW/cm²), and the light tip integrity of 40 light-curing units (LCUs) used in 16 public oral health service units in the city of Uberlândia, Minas Gerais, Brazil. The radiant power and emission spectrum were measured using a spectrometer attached to an integrating sphere. Irradiance profiles were obtained using a Beam Profiler. The tips were photographed and classified in 4 categories: A. undamaged, B. contaminated by resin residue, C. damaged, and D. contaminated and damaged. Data were analyzed by one-way ANOVA (α = 0.05), and the emission spectra and beam profiles were analyzed descriptively. The LCUs tested were single-peak light-emitting diode units, and 85% of the LCUs had damaged light tips. The radiant power values were significantly different between the LCUs (P < 0.001) and ranged between 94.2 and 588.2 mW. The irradiance ranged from 255.8 to 1597.8 mW/cm². The LCU tip diameter ranged from 6.1 to 8.3 mm. Two-dimensional beam profiles show that the light distribution was not homogeneous across the tips, and an irradiance peak was often observed at the center of the LCUs with smaller tips. Only 15% of the LCU were undamaged, reflecting substantial variability in radiant power and irradiance delivered. Although no statistically significant differences were observed among tip condition categories, these conditions showed a trend toward reduced and inhomogeneous light output.

Indexed as

Curing Lights, DentalBrazilLight

Identifiers

PMID42659411
PMCPMC13502927

What OpenQuestion holds

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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.