Residual HEMA and TEGDMA Release and Cytotoxicity Evaluation of Resin-Modified Glass Ionomer Cement and Compomers Cured with Different Light Sources

Table 2

The residual monomer concentrations eluted from resin modified glass ionomer cement and compomers cured with halogen and LED light curing units in different time periods (mean ± sd).

Time	Monomers	Light curing unit	Materials
			Dyract Extra	Twinkystar	Ketac N100	P
4 minutes	HEMA	Halogen	8.3 ± 1.2	7.4 ± 1.8	8.5 ± 2.6	ns
		LED	9.9 ± 1.2	7.3 ± 1.0	7.1 ± 2.2	ns
	TEGDMA	Halogen	0.4 ± 0.05	2.4 ± 0.5^a	1.07 ± 0.8^a,b	<0.05
		LED	1.0 ± 1.5	2.6 ± 1.1	1.2 ± 0.6	ns
24 hours	HEMA	Halogen	20.4 ± 4.5	14.6 ± 5.4	18.5 ± 4.7	ns
		LED	20.1 ± 2.9	16.7 ± 1.6	16.8 ± 3.1	ns
	TEGDMA	Halogen	1.1 ± 0.1	6.8 ± 4.8^a	4.5 ± 2.6	<0.05
		LED	2.4 ± 2.2	6.5 ± 3.0	4.3 ± 2.1	ns

^a𝑃<0.05 compared to Dyract extra.
^b𝑃<0.05 compared to Twinkystar.
The concentration values were calculated as μM (micromolarity).