ArticleBMC oral health2026
Evaluation of the effect of light intensity and direction on microleakage in composite resins.
Article in BMC oral health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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.
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.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeDespite the aesthetic advantages of composite resins, polymerization shrinkage leads to microgaps, microleakage, and restoration failures. Various light-curing devices and techniques have been developed to reduce polymerization shrinkage; however, microleakage has not been completely prevented. High light intensity can shorten treatment time but may also increase polymerization stresses, potentially leading to increased microleakage. This study aimed to investigate the effects of different light intensities and application directions on microleakage.
methodsIn this study, 48 caries-free incisor teeth were used. Black V cavities were prepared for the teeth. Teeth were divided into three groups according to the direction of light application (Labial, Incisal, Lingual) and two subgroups according to the different light device types[Woodpecker i LED(2500 mW/cm
resultsThe type of light-curing device did not result in a statistically significant difference in microleakage (p = 0.274) Microleakage at the gingival margin was significantly higher than that at the incisal margin (p = 0.000) A difference was observed between the groups based on the light application direction, and a statistically significant difference was identified between the incisal and lingual directions (p = 0.002).
conclusionPolymerization shrinkage is a multifactorial problem. High light intensity reduces working time but increases polymerization shrinkage. The direction of light application was found to affect microleakage. For clinical success, light intensity, application direction, and material selection should be considered together.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.