ABSTRACT
Objectives: To measure the release of TEGDMA and BisGMA from two commercially available
composite resins; Filtek Z 250 (3M ESPE, Germany), Leaddent (Leaddent, Germany) and
two fissure sealants; Helioseal F (3M ESPE, Germany) Enamel Loc (Premiere Rev, USA)
over 1, 3 and 7 days after polymerization with standard quartz-tungsten halogen Coltolux
II (QHL) (Coltene Switzerland) and a standard blue light emitting diode Elipar Freelight
2 (3M ESPE, Germany).
Methods: 9 samples of each material were placed in disc shaped specimens in 1 mm of
thickness and 10 mm in diameter (n=36). Each material was polymerized using LED for
20 s (n=12), 40 s (n=12) and halogen for 40 s (n=12), respectively. High Performance
Liquid Chromatography (HPLC) was used to measure the amount of monomers released over
1, 3 and 7 days. Data was analyzed using one way ANOVA and Bonferroni test for multiple
comparisons with a significance level of .05.
Results: LED 20 sec group showed the highest release of monomers at 1, 3 and 7 days
in sealant groups. Halogen 40 sec group resulted highest release of monomers for Leaddent
at all time intervals (P<.05)
Conclusions: Efficiency of the curing unit and applying the recommended curing time
of the light activated resin based dental materials is very important to protect the
patient from potential hazards of residual monomers. (Eur J Dent 2010;4:34-40)
Key words
BisGMA; TEGDMA - Residual monomer - Composite resin - Fissure sealant
