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Assessment of influence of LED curing units used on microhardness of resin-modified glass ionomer sealants


Pit and fissure sealants
Curing lights, dental

How to Cite

Marques JF de L, Ferraz LN, Lopes BKB, Vasconcelos TAB, Teixeira TR, Lima DANL, Aguiar FHB, Miranda D de A. Assessment of influence of LED curing units used on microhardness of resin-modified glass ionomer sealants. Braz. J. Oral Sci. [Internet]. 2022 Aug. 22 [cited 2023 May 31];21(00):e226202. Available from:


Aim: Resin modified glass ionomer (RMGI) is class of material that can be used as sealant for preventing and arresting the progression of caries in pits and fissures. As these are hybrid materials, their properties can be affected by factors related to the polymerization process. Therefore, this study aimed to evaluate the influence of different generations of LED curing units (Elipar DeepCure-L and VALO Grand) on Knoop microhardness values (KHN) of RMGI sealants (Clinpro XT and Vitremer). Methods: Forty cylindrical specimens (6mm ø x 1 mm high) were prepared according to the manufacturer’s instructions and divided into four groups (n=10) according to the type of RMGI and LED used. The KHN of the top surface of each sample was calculated 7 days after light-curing. Data were submitted to two-way ANOVA (α = 0.05). Results: Vitremer had higher KHN values than Clinpro XT after using both LEDs (p<0.0001), but especially when light-cured with the use of VALO Grand (p<0.0001). Whereas the KHN value of Clinpro was not influenced by the LED device (p>0.05). Conclusions: Top surface microhardness values of RGMI sealants were affected by both material composition and generations of LED curing units used. Third generation LED curing units seemed to be more efficient for the polymerization of RMGI-based sealants.


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Copyright (c) 2021 Joyce Figueiredo de Lima Marques, Laura Nobre Ferraz, Beatriz Kelly Barros Lopes, Tamires Aparecida Borges Vasconcelos, Thiely Roberts Teixeira, Débora Alves Nunes Leite Lima, Flávio Henrique Baggio Aguiar, Diogo de Azevedo Miranda


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