Micro-computed tomographic evaluation of the effects of pre-heating and sonic delivery on the internal void formation of bulk-fill composites

Gülbike DEMİREL; Ayşe Işıl ORHAN; Özgür IRMAK; Fulya AYDIN; Arda BUYUKSUNGUR; Burak BİLECENOĞLU; Kaan ORHAN

doi:10.4012/dmj.2020-071

Original Paper

Micro-computed tomographic evaluation of the effects of pre-heating and sonic delivery on the internal void formation of bulk-fill composites

Gülbike DEMİREL, Ayşe Işıl ORHAN, Özgür IRMAK, Fulya AYDIN, Arda BUYUKSUNGUR, Burak BİLECENOĞLU, Kaan ORHAN

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Keywords: Composite placement, Internal void, Sonic activation, Pre-heating, Micro-computed tomography

JOURNAL FREE ACCESS

2021 Volume 40 Issue 2 Pages 525-531

DOI https://doi.org/10.4012/dmj.2020-071

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Abstract

The aim of this study was to compare the effects of conventional, sonic or pre-heating insertion techniques on internal void formation of bulk-fill composites with micro-computed tomography. Standardized cylindrical cavities were prepared in 160 human third molars. Four groups received different paste-like bulk-fill composites: SonicFill 2 (SF2); VisCalor Bulk (VCB); Filtek One Bulk-fill restorative (FBF); Tetric EvoCeram Bulk Fill (TEB); and a conventional posterior composite, Clearfil Majesty Posterior (CMP). A hybrid CAD/CAM block was selected as a control (n=10). Composite restorations were built according to each resin composite type and insertion technique (n=10). Micro-CT was used to assess internal void rates. Data was analyzed with two-way ANOVA and Tukey’s multiple comparisons test (α=0.05). CAD/CAM blocks were free of voids. For each composite, the highest void rates were observed for the sonic delivery method (p<0.05) except for SF2. SF2 was not affected by insertion techniques (p>0.05). Other composites showed the lowest void rates with pre-heating technique.

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