Evaluation of XXXX /TEGDMA monomers leaching from a hybrid dental composite resin.

@entity10021 @entity7640 @entity9029
AIM: Postcuring elution of unreacted monomers has harmful effects on mechanical characteristics and biocompatibility of resin composite restorations. The purpose of this study was to evaluate the amount of eluted @entity7640 and TEGDMA monomers from a hybrid dental composite cured with LED or @entity10021 curing unit after immersing in saliva or water. METHODS: Thirty-six composite disc specimens (Hybrid Filtek Z250,3M-ESPE, USA) were made and divided in four groups. After polymerization with LED or @entity10021 curing units, samples were immersed in water or saliva for 24 hours. The amounts of each monomer ( @entity7640 and TEGDMA) released in different mediums were detected by high-performance liquid chromatography (HPLC). Data were analyzed with two-way ANOVA and one-way ANOVA tests. RESULTS: The samples were immersed in water, in both curing methods, released significantly more @entity7640 than @entity9029 (P<0.05). The total monomers eluted was higher in samples cured with @entity10021 curing unit than LED (P=0.001); in addition, saliva caused elution of more monomer than water (P=0.007). CONCLUSION: In conclusion, chemical property of monomers, power of curing light unit and the type of immersion media play key roles in the quantity of eluted monomers from composite resins. Saliva and @entity10021 curing unit can cause greater monomer leaching from hybrid resins composite.
