Abstract
The aim of this study was to evaluate internal and marginal adaptation of high-viscosity bulk-fill composites to enamel and dentin with a self-etch (SE) and an etch-and-rinse adhesive (ER) without and with artificial aging. 128 MOD cavities in extracted human molars were prepared, randomly assigned to 8 groups (n = 16), bonded with either OptiBond FL (OFL, ER) or Xeno V+ (X, SE), and restored in 4 mm horizontal bulk layers with SonicFill (SF), Tetric EvoCeram Bulk fill (TEC), and x-tra fil (XF). Incremental layering technique with Premise (P) served as control. Half of the specimens each (n = 8) were subjected either to water storage (1 day, 37 °C) or prolonged storage (180 days) and thereafter thermocycling. Replicas were analyzed for marginal gap formation. After sectioning, interfacial adhesive defects were assessed. Results were statistical analyzed. (1) Internal adaptation: Except for TEC/OFL at enamel without artificial aging, no significant differences between bulk-fill composites and the control were observed. All groups at dentin with OFL showed less internal adhesive defects than that with X (p < 0.05). (2) Marginal adaptation: No significant differences were observed between bulk-fill composites and control except for P after artificial aging (p > 0.05). All other composites, regardless of artificial aging, formed significantly more marginal gaps at enamel with X compared to with OFL (p ≤ 0.05). Simplified restorations with high-viscosity bulk-fill composite showed comparable internal and marginal adaptation to incrementally placed fillings. A superiority of the 3-step ER approach was seen compared to the 1-step SE adhesive irrespective of the bulk-fill composite used.
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04 February 2019
In the original publication of the article the paragraph “The four resin-based composites…” appearing below the “Materials and methods” section is incomplete. The correct paragraph is provided in this correction below.
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Acknowledgements
The intact, non-carious, unrestored human molars were selected out of a pool of collected teeth in accordance with an approved protocol of the Ethics Committee of the University Leipzig, Germany (no. 299-10-04102010).
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The restoration materials were provided by Dentsply Sirona GmbH, Ivoclar Vivadent AG and Voco GmbH.
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The original version of this article was revised: In the original publication of the article the paragraph “The four resin-based composites…” appearing below the “Materials and methods” section is incomplete. The correct paragraph is provided in this correction below: The four resin-based composites were applied to the prepared cavities combined with each of the two adhesives (etch-and-rinse, ER; self-etch, SE). Table 1 shows the properties and composition of the materials used and supplementary table 1 summarizes the procedure of application.
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Haak, R., Näke, T., Park, KJ. et al. Internal and marginal adaptation of high-viscosity bulk-fill composites in class II cavities placed with different adhesive strategies. Odontology 107, 374–382 (2019). https://doi.org/10.1007/s10266-018-0402-1
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DOI: https://doi.org/10.1007/s10266-018-0402-1