ORIGINAL RESEARCH article
Front. Mater.
Sec. Polymeric and Composite Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1578638
Effect of rapid high-intensity light curing on micro-leakage in conventional and bulk-fill resin composites
Provisionally accepted
- the second affiliated hospital of Jiaxing University, Jiaxing, China
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Purpose: This study compared the effect of high-intensity (3200 mW/cm2) and conventional intensity (1000 mW/cm2) light-curing on the micro-leakage properties of conventional and bulk-fill resin composites. Methods: Cavities were respectively prepared on the mesial and distal surfaces of 60 molars. 3M™ Filtek™ One Bulk Fill Restorative (BF), 3MTM FiltekTM Z350 XT Universal Restorative (Z350) and 3M™ Single bond universal adhesive were used to fill the molars with different light curing modes. After temperature cycling, staining and sectioning, the micro-leakage of these teeth was observed with microscope. Results: In the condition of adhesive at standard power, the micro-leakage of BF in both light-curing irradiation modes showed no significance (P>0.05), and that of Z350 was significantly increased following high-intensity irradiation (P<0.05). Compared with the standard mode, the micro-leakage was significantly higher (P<0.05) for both BF and Z350 under the condition of high-intensity irradiation for adhesive. Conclusion: High-power and short-duration light mode is not suitable for all materials. The selection of light-curing mode should be based on the material composition and physicochemical properties, with determination of appropriate irradiation time and intensity to minimize micro-leakage in resin-based restorative materials and thereby ensure favorable restoration prognosis
Keywords: Bulk-fill composite, Radiant intensity, light-curing time, Dental adhesives, Micro-leakage
Received: 18 Feb 2025; Accepted: 15 May 2025.
Copyright: © 2025 Lu, Cai and Zhou. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Dongyan Zhou, the second affiliated hospital of Jiaxing University, Jiaxing, China
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