| ORIGINAL ARTICLE |
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| Year : 2020 | Volume
: 23
| Issue : 1 | Page : 36-41 |
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Bonding performance and mechanical properties of flowable bulk-fill and traditional composites in high c-factor cavity models
Leticia Virginia Freitas Chaves1, Rodolfo Xavier de Sousa Lima1, Lucas José de Azevedo Silva1, Roberta Caroline Bruschi Alonso2, Saulo Geraldeli3, Boniek Castillo Dutra Borges1
1 Department of Dentistry, Federal University of Rio Grande do Norte, University of Rio Grande do Norte, Natal, RN, Brazil
2 Technology and Research Center, University of Mogi das Cruzes; Department of Dentistry, Metropolitan University of Santos, SP, Brazil
3 Department of Operative Dentistry, University of Florida, Gainesville, FL, USA
Correspondence Address:
Dr. Leticia Virginia Freitas Chaves
Department of Dentistry, Federal University of Rio Grande do Norte, Av. Sen. Salgado Filho, 1787, Natal, RN
Brazil
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/JCD.JCD_58_19
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Objectives: The aim of this study is to evaluate bond strength (BS), shrinkage stress (SS), flexural strength (FS), and elastic modulus (E) of three flowable bulk fill in comparison with conventional composites.
Materials and Methods: Three bulk fill (Filtek Bulk Fill Flow, Surefil SDR, X-tra Base) and three conventional composites (Filtek Z250 XT, Grandioso, Dentsply TPH3) were used. For BS, conical cavities (n = 10) were prepared in bovine dentine and restored with materials and were analyzed through push-out test in a universal testing machine (UTM). For FS/EM, 60 (n = 10) bar specimens (7 mm × 2 mm × 1 mm) were prepared and evaluated with a UTM. SS was measured in UTM coupled to an extensometer (n = 5). The data were statistically evaluated using one-way ANOVA/Tukey tests (P < 0.05).
Results: Conventional composites showed higher E when compared to bulk-fill composites. Regarding FS, they showed similar results, except for (XBF) Xtra Bulk Fill that was inferior. SS and BS of bulk-fill composites were significantly lower and higher than conventional composites, respectively, except for XBF, which showed similar BS to conventional ones.
Conclusions: Flowable bulk-fill composites, except XBF, showed higher BS, lower SS, similar FS, and lower E when compared to conventional ones.
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