Objectives. To study monomer elution from four resin-based composites (RBCs) cured with different light sources. Methods. Twenty-eight premolars were randomly allocated to four groups. Standardized cavities were prepared and restored with a nanohybrid (Filtek Supreme XT or Tetric EvoCeram), an ormocer (Admira) or a microhybrid RBC (Filtek Z250) which served as control. Buccal restorations were cured with a halogen and oral restorations with an LED light-curing unit. Elution of diurethane dimethacrylate (UDMA), Bisphenol A diglycidylether methacrylate (BisGMA), triethylene glycol dimethacrylate (TEGDMA) and 2-hydroxyethyl methacrylate (HEMA) was analyzed using high-performance liquid chromatography (HPLC) 1h to 28 days post-immersion in 75% ethanol. Data were analyzed using multivariate and repeated measures analysis of variance (alpha = 0.05). Results. The greatest elution of UDMA and BisGMA occurred from Tetric EvoCeram and the least from Filtek Z250 (p lt 0.05). LED and halogen lig...ht-curing units gave similar results for all RBCs (p > 0.05) except Tetric EvoCeram which showed greater elution for the LED unit (p lt 0.05). TEGDMA was below the limit of quantification. HEMA eluted in similar concentrations from Filtek Supreme and Tetric EvoCeram (p > 0.05). Significance. : The two nanohybrid RBCs eluted more cross-linking monomers than the ormocer and the control microhybrid RBC. Continuous elution over 28 days indicates that RBCs act as a chronic source of monomers in clinical conditions. Light source may affect monomer elution since differences were found for one out of four RBCs. Mathematical models for elution kinetics of UDMA and BisGMA indicated two elution mechanisms.
Keywords:
Resin based composites / Monomers / Methacrylates / Elution / HPLC / Light curing units / Nanohybrid / Ormocer
TY - JOUR
AU - Manojlović, Dragica
AU - Radisić, Marina
AU - Vasiljević, Tatjana
AU - Živković, Slavoljub
AU - Laušević, Mila
AU - Miletić, Vesna
PY - 2011
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5640
AB - Objectives. To study monomer elution from four resin-based composites (RBCs) cured with different light sources. Methods. Twenty-eight premolars were randomly allocated to four groups. Standardized cavities were prepared and restored with a nanohybrid (Filtek Supreme XT or Tetric EvoCeram), an ormocer (Admira) or a microhybrid RBC (Filtek Z250) which served as control. Buccal restorations were cured with a halogen and oral restorations with an LED light-curing unit. Elution of diurethane dimethacrylate (UDMA), Bisphenol A diglycidylether methacrylate (BisGMA), triethylene glycol dimethacrylate (TEGDMA) and 2-hydroxyethyl methacrylate (HEMA) was analyzed using high-performance liquid chromatography (HPLC) 1h to 28 days post-immersion in 75% ethanol. Data were analyzed using multivariate and repeated measures analysis of variance (alpha = 0.05). Results. The greatest elution of UDMA and BisGMA occurred from Tetric EvoCeram and the least from Filtek Z250 (p lt 0.05). LED and halogen light-curing units gave similar results for all RBCs (p > 0.05) except Tetric EvoCeram which showed greater elution for the LED unit (p lt 0.05). TEGDMA was below the limit of quantification. HEMA eluted in similar concentrations from Filtek Supreme and Tetric EvoCeram (p > 0.05). Significance. : The two nanohybrid RBCs eluted more cross-linking monomers than the ormocer and the control microhybrid RBC. Continuous elution over 28 days indicates that RBCs act as a chronic source of monomers in clinical conditions. Light source may affect monomer elution since differences were found for one out of four RBCs. Mathematical models for elution kinetics of UDMA and BisGMA indicated two elution mechanisms.
PB - Elsevier Sci Ltd, Oxford
T2 - Dental Materials
T1 - Monomer elution from nanohybrid and ormocer-based composites cured with different light sources
EP - 378
IS - 4
SP - 371
VL - 27
DO - 10.1016/j.dental.2010.11.017
ER -
@article{
author = "Manojlović, Dragica and Radisić, Marina and Vasiljević, Tatjana and Živković, Slavoljub and Laušević, Mila and Miletić, Vesna",
year = "2011",
abstract = "Objectives. To study monomer elution from four resin-based composites (RBCs) cured with different light sources. Methods. Twenty-eight premolars were randomly allocated to four groups. Standardized cavities were prepared and restored with a nanohybrid (Filtek Supreme XT or Tetric EvoCeram), an ormocer (Admira) or a microhybrid RBC (Filtek Z250) which served as control. Buccal restorations were cured with a halogen and oral restorations with an LED light-curing unit. Elution of diurethane dimethacrylate (UDMA), Bisphenol A diglycidylether methacrylate (BisGMA), triethylene glycol dimethacrylate (TEGDMA) and 2-hydroxyethyl methacrylate (HEMA) was analyzed using high-performance liquid chromatography (HPLC) 1h to 28 days post-immersion in 75% ethanol. Data were analyzed using multivariate and repeated measures analysis of variance (alpha = 0.05). Results. The greatest elution of UDMA and BisGMA occurred from Tetric EvoCeram and the least from Filtek Z250 (p lt 0.05). LED and halogen light-curing units gave similar results for all RBCs (p > 0.05) except Tetric EvoCeram which showed greater elution for the LED unit (p lt 0.05). TEGDMA was below the limit of quantification. HEMA eluted in similar concentrations from Filtek Supreme and Tetric EvoCeram (p > 0.05). Significance. : The two nanohybrid RBCs eluted more cross-linking monomers than the ormocer and the control microhybrid RBC. Continuous elution over 28 days indicates that RBCs act as a chronic source of monomers in clinical conditions. Light source may affect monomer elution since differences were found for one out of four RBCs. Mathematical models for elution kinetics of UDMA and BisGMA indicated two elution mechanisms.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Dental Materials",
title = "Monomer elution from nanohybrid and ormocer-based composites cured with different light sources",
pages = "378-371",
number = "4",
volume = "27",
doi = "10.1016/j.dental.2010.11.017"
}
Manojlović, D., Radisić, M., Vasiljević, T., Živković, S., Laušević, M.,& Miletić, V.. (2011). Monomer elution from nanohybrid and ormocer-based composites cured with different light sources. in Dental Materials
Elsevier Sci Ltd, Oxford., 27(4), 371-378.
https://doi.org/10.1016/j.dental.2010.11.017
Manojlović D, Radisić M, Vasiljević T, Živković S, Laušević M, Miletić V. Monomer elution from nanohybrid and ormocer-based composites cured with different light sources. in Dental Materials. 2011;27(4):371-378.
doi:10.1016/j.dental.2010.11.017 .
Manojlović, Dragica, Radisić, Marina, Vasiljević, Tatjana, Živković, Slavoljub, Laušević, Mila, Miletić, Vesna, "Monomer elution from nanohybrid and ormocer-based composites cured with different light sources" in Dental Materials, 27, no. 4 (2011):371-378,
https://doi.org/10.1016/j.dental.2010.11.017 . .
