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

Mohammad-Esmaeel Ebrahimi-Chaharom; Leila Safyari; Hossein Safarvand; Elmira Jafari-Navimipour; Parnian Alizadeh-Oskoee; Amir-Ahmad Ajami; Mahdi Abed-Kahnamouei; Mahmoud Bahari

doi:10.4317/jced.56989

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

J Clin Exp Dent. 2020 Sep 1;12(9):e813-e820. doi: 10.4317/jced.56989. eCollection 2020 Sep.

Authors

Mohammad-Esmaeel Ebrahimi-Chaharom^{1

2}, Leila Safyari³, Hossein Safarvand³, Elmira Jafari-Navimipour¹, Parnian Alizadeh-Oskoee⁴, Amir-Ahmad Ajami¹, Mahdi Abed-Kahnamouei¹, Mahmoud Bahari⁵

Affiliations

¹ Associate Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
² Dental and Periodontal Research Center, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
³ Assistant Professor, Department of Operative Dentistry, Faculty of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran.
⁴ Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
⁵ Assistant Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.

Abstract

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

Material and methods: 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.

Results: 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).

Conclusions: 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. Key words:Bulk fill composite resin, elution, HPLC, residual monomer, temperature.