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Effect of food stimulated liquids and thermocycling on the monomer elution from a nanofilled composite.

Tabatabaei MH, Sadrai S, Bassir SH, Veisy N, Dehghan S - Open Dent J (2013)

Bottom Line: The results showed that the amount of released TEGDMA was significantly higher than that of Bis-GMA; however, there were not any significant differences between the amount of released Bis-GMA and UDMA.Moreover, the highest amount of monomers was released from samples immersed in ethanol solution; samples immersed in citric acid and lactic acid significantly released more monomers than those immersed in distilled water.Thermal shocks and storage time are other factors that increased the release of monomers from the composite resin.

View Article: PubMed Central - PubMed

Affiliation: Restorative Department and Dental Researches Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.

ABSTRACT
The present study was aimed to evaluate the effects of food simulating liquids and thermocycling on the elution of monomers from a nanofilled resin composite in different immersion times. Five Specimen discs were made from a nano-hybrid composite (Supreme 3M) for each group (Total = 180) and immersed in distilled water (control), citric acid, lactic acid, and 75% aqueous ethanol solution. The discs were removed after 24 h, 48 h, 72 h, 1 wk, 4 wk, and 12 wk. Three groups of samples underwent thermocycling for 1000, 2000 and 3000 cycles. The solutes were analyzed with HPLC for detection of eluted monomers. The results showed that the amount of released TEGDMA was significantly higher than that of Bis-GMA; however, there were not any significant differences between the amount of released Bis-GMA and UDMA. Moreover, the highest amount of monomers was released from samples immersed in ethanol solution; samples immersed in citric acid and lactic acid significantly released more monomers than those immersed in distilled water. Furthermore, the immersion time in aqueous ethanol solution had an increasing effect on the release of monomers. In addition, the higher amounts of monomers were release from samples immersed in ethanol and citric acid which underwent a higher number of thermal cycles. In conclusion, food and drink stimulated liquids used in this study increased the amount of some of the monomers released from composite resin. Thermal shocks and storage time are other factors that increased the release of monomers from the composite resin.

No MeSH data available.


Related in: MedlinePlus

The relationship between immersion medias and different immersion times and thermocycling and TEGDMA release; abbreviationsof groups are: 1: 24 h, 2: 48 h, 3: 72 h, 4: 1 wk, 5: 4 wk, 6: 12 wk, 7: 1000 cycles, 8: 2000 cycles, 9: 3000 cycles
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Figure 4: The relationship between immersion medias and different immersion times and thermocycling and TEGDMA release; abbreviationsof groups are: 1: 24 h, 2: 48 h, 3: 72 h, 4: 1 wk, 5: 4 wk, 6: 12 wk, 7: 1000 cycles, 8: 2000 cycles, 9: 3000 cycles

Mentions: There were not any significant differences in the amount of released TEGDMA between 24, 48, and 72 h, but TEGDMA was significantly release more at 4 wk. Generally, the elution of TEGDMA from composite samples was increased over the time (Fig. 4).


Effect of food stimulated liquids and thermocycling on the monomer elution from a nanofilled composite.

Tabatabaei MH, Sadrai S, Bassir SH, Veisy N, Dehghan S - Open Dent J (2013)

The relationship between immersion medias and different immersion times and thermocycling and TEGDMA release; abbreviationsof groups are: 1: 24 h, 2: 48 h, 3: 72 h, 4: 1 wk, 5: 4 wk, 6: 12 wk, 7: 1000 cycles, 8: 2000 cycles, 9: 3000 cycles
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750967&req=5

Figure 4: The relationship between immersion medias and different immersion times and thermocycling and TEGDMA release; abbreviationsof groups are: 1: 24 h, 2: 48 h, 3: 72 h, 4: 1 wk, 5: 4 wk, 6: 12 wk, 7: 1000 cycles, 8: 2000 cycles, 9: 3000 cycles
Mentions: There were not any significant differences in the amount of released TEGDMA between 24, 48, and 72 h, but TEGDMA was significantly release more at 4 wk. Generally, the elution of TEGDMA from composite samples was increased over the time (Fig. 4).

Bottom Line: The results showed that the amount of released TEGDMA was significantly higher than that of Bis-GMA; however, there were not any significant differences between the amount of released Bis-GMA and UDMA.Moreover, the highest amount of monomers was released from samples immersed in ethanol solution; samples immersed in citric acid and lactic acid significantly released more monomers than those immersed in distilled water.Thermal shocks and storage time are other factors that increased the release of monomers from the composite resin.

View Article: PubMed Central - PubMed

Affiliation: Restorative Department and Dental Researches Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.

ABSTRACT
The present study was aimed to evaluate the effects of food simulating liquids and thermocycling on the elution of monomers from a nanofilled resin composite in different immersion times. Five Specimen discs were made from a nano-hybrid composite (Supreme 3M) for each group (Total = 180) and immersed in distilled water (control), citric acid, lactic acid, and 75% aqueous ethanol solution. The discs were removed after 24 h, 48 h, 72 h, 1 wk, 4 wk, and 12 wk. Three groups of samples underwent thermocycling for 1000, 2000 and 3000 cycles. The solutes were analyzed with HPLC for detection of eluted monomers. The results showed that the amount of released TEGDMA was significantly higher than that of Bis-GMA; however, there were not any significant differences between the amount of released Bis-GMA and UDMA. Moreover, the highest amount of monomers was released from samples immersed in ethanol solution; samples immersed in citric acid and lactic acid significantly released more monomers than those immersed in distilled water. Furthermore, the immersion time in aqueous ethanol solution had an increasing effect on the release of monomers. In addition, the higher amounts of monomers were release from samples immersed in ethanol and citric acid which underwent a higher number of thermal cycles. In conclusion, food and drink stimulated liquids used in this study increased the amount of some of the monomers released from composite resin. Thermal shocks and storage time are other factors that increased the release of monomers from the composite resin.

No MeSH data available.


Related in: MedlinePlus