ArticleBiomaterials research2022
Influence of irradiation distance on the mechanical performances of resin composites polymerized with high-irradiance light curing units.
Article in Biomaterials research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Effect of the Design and Exposure Mode of Different Multiple-Peak Light-Curing Units on Light Emission, Temperature Rise, and Intraoral Access.The journal of adhesive dentistry · 2026Article
- Effect of Moving the Tip of the Light Curing Unit on the Irradiance Value Delivered.Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] · 2025Article
- Effects of Curing Distance and Time on the Microhardness of Posterior Composites: An Experimental Study.Cureus · 2025Article
- Article
- Effect of preheating and curing lamp distance on the degree of conversion of four nanohybrid resins: AnJournal of clinical and experimental dentistry · 2024Article
- One-Year Evaluation of High-Power Rapid Curing on Dentin Bond Strength.Materials (Basel, Switzerland) · 2024Article
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Authors and funding
5 authors.
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Abstract
backgroundThe aim of this study was to evaluate the influence of increased irradiation distance on the flexural strength (FS), dentin micro-shear bond strength (μSBS), and the degree of conversion (DC) of bulk-fill flowable, conventional flowable, and packable resin composites.
methodsThe resin composites tested were Surefil® SDR™ (SDR), Filtek Z350 XT Flowable Restorative A2 shade (Z3F), and Filtek Z350 XT Universal Restorative A2 shade (Z3P). Specimens were cured at four irradiation distances (0, 2, 4, and 8 mm) with an Elipar DeepCure-S LED curing light for 20 s. FS tests were performed (n = 15) using bar-shaped specimens (8 mm × 2 mm × 2 mm) of the resin composites. μSBS tests were performed on the occlusal surfaces of extracted third molars from humans that were ground to expose dentin (n = 15). DC was measured by using Raman spectroscopy on the top and bottom surfaces of disk specimens (2-mm thick) (n = 3). To further investigate whether extended irradiation times could compensate for reduced irradiance, additional Z3P specimens were prepared, which were light-cured at 8-mm distances for 40 and 60 s and subjected to FS tests, μSBS tests, and Raman spectroscopy. Both two-way and one-way ANOVA were used for statistical analyses.
resultsBoth FS and DC of Z3P specimens cured at an 8-mm distance were significantly lower than those cured at shorter distances (p < 0.05), whereas the FS and DC of the Z3F and SDR specimens were not significantly influenced by increasing distances. The μSBSs of the three types of resin composites reduced with increasing irradiation distances. The FS, μSBS, and DC of the Z3P specimen light-cured at 8 mm for 40 s were comparable to those of the Z3P specimen cured at 0 mm for 20 s.
conclusionsIncreasing the irradiation distance to 8 mm can have a deleterious influence on mechanical performances, including the FS, DC, and dentin μSBS, of the resin composites polymerized with high-irradiance light curing units.
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