Method: Eighty samples (n=10, diameter: 4.5mm, thickness: 2mm) of two different composite materials (Ceram XTM & FiltekTM Supreme XT) were prepared according to manufacturers’ instructions. Four different mouthrinses were tested: two of them contained alcohol (Listerine; 21.6% and One drop only; 76%) and the other two were alcohol-free (ChlorhexamedÒ 0.2% and MeridolÒ). After polymerisation, the composite specimens (10/mouthrinse) were stored in a mixture of mouthrinse and human saliva for 1 hour. From these storage media, samples were prepared and analysed by LC-MS/MS, for the elution of substances.
Result: No monomers were found to be eluted by any of the tested composite materials, independently of the mouthrinse used. Some traces of UDMA 2 were detected but they were under the quantification limit of 0.1mg/ml.
Conclusion: According to the present findings, none of the tested mouthrinses were found to influence the elution of substances from dental composite materials. The use of alcohol-containing mouthrinses does not seem to have any detrimental effect on the elution of substances from the dental composite materials compared to the one without alcohol