The effect of pre-heating on monomer elution from bulk-fill resin composites

• Mohammad-Esmaeel Ebrahimi-Chaharom ^[3] ; Leila Safyari ^[1] ; Hossein Safarvand ^[1] ; Elmira Jafari-Navimipour ^[2] ; Parnian Alizadeh-Oskoee ^[2] ; Amir-Ahmad Ajami ^[2] ; Mahdi Abed-Kahnamouei ^[2] ; Mahmoud Bahari ^[2]
  1. [1] Ardabil University of Medical Sciences

     Ardabil University of Medical Sciences

     Irán

     
  2. [2] Tabriz University of Medical Sciences

     Tabriz University of Medical Sciences

     Irán

     
  3. [3] Associate Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran; Dental and Periodontal Research Center, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran

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• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 12, Nº. 9 (September), 2020, págs. 813-820
• Idioma: inglés
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• Resumen

  • The present study was aimed to evaluate the effect of pre-heating of bulk -fill resin composites on monomer elution from them.

    Three different types of resin composites were used including Tetric N-Ceram Bulk Fill, X-tra Fill and X-tra Base. 10 cylindrical samples were prepared from each resin composites. Before light curing, 5 samples were pre-heated until reaching 68˚C, then 5 other samples were polymerized at room temperature. After 24 hours, release of UDMA, TEGDMA and BIS-GMA monomers were measured by High-Performance Liquid Chromatography analysis. Data analysis was performed by two-way ANOVA test, Games-Howell and Sidak post hoc tests.

    Pre-heating did not have any statistically significant effect on the mean values of UDMA, TEGDMA and Bis-GMA elution (p>0.05). The greatest amount of released Bis-GMA and UDMA was obtained from Tetric N-Ceram Bulk-fill composite. The greatest amount of released TEGDMA was obtained from X-tra Fill composite. X-tra Base composite showed the lowest amount of monomer release (P<0.001).

    Pre-heating did not have any effect on monomer release from bulk-fill resin composites. Moreover, the amount and the type of monomers released from various bulk-fill resin composites were not similar.