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The Journal of Adhesive Dentistry



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J Adhes Dent 18 (2016), No. 2     15. Apr. 2016
J Adhes Dent 18 (2016), No. 2  (15.04.2016)

Page 119-124, doi:10.3290/j.jad.a35905, PubMed:27042703

Effect of Bulk-filling on the Bonding Efficacy in Occlusal Class I Cavities
Van Ende, Annelies / De Munck, Jan / Van Landuyt, Kirsten / Van Meerbeek, Bart
Purpose: To evaluate the effect of bulk filling Class I posterior cavities on bonding to cavity-bottom dentin.
Materials and Methods: Two flowable "base" bulk-fill composites (Filtek Bulk Fill Flowable, SDR), one paste-like "full-body" bulk-fill composite (Tetric EvoCeram Bulk Fill) and one conventional paste-like composite (Filtek Z100) were bonded (G-ænial Bond) to either a flat surface (3.5 x 3.5 x 4 mm; C-factor: 0.18) or a Class I cavity (3.5 x 3.5 x 4 mm; C-factor: 5.8). After 1-week water storage, the restorations were sectioned to obtain 4 rectangular microspecimens that were subjected to microtensile bond strength (μTBS) testing.
Results: No significant differences in μTBS were recorded between all composites when bonded onto a flat surface (p > 0.05). When bonded into a Class I cavity, the μTBS of all composites except SDR significantly decreased (p < 0.001).
Conclusion: Both the configuration factor and the type of bulk-fill composite were found to have a great impact on bonding to cavity-bottom dentin.

Keywords: adhesion, μTBS, shrinkage, configuration