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VOLUME 18 , ISSUE 12 ( December, 2017 ) > List of Articles

RESEARCH ARTICLE

Clinical Time Required and Internal Adaptation in Cavities restored with Bulk-fill Composites

Guilherme Ferreira Rego, Luis Felipe Jochims Schneider, Marcos Gabriel Vianna-de-Pinho, Marina Lermenn Vidal, Roberta Caroline Bruschi Alonso, Larissa Maria Cavalcante

Citation Information : Rego GF, Schneider LF, Vianna-de-Pinho MG, Vidal ML, Alonso RC, Cavalcante LM. Clinical Time Required and Internal Adaptation in Cavities restored with Bulk-fill Composites. J Contemp Dent Pract 2017; 18 (12):1107-1111.

DOI: 10.5005/jp-journals-10024-2184

Published Online: 01-12-2017

Copyright Statement:  Copyright © 2017; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

The aim of this study was to compare the restorative time required and the internal adaptation after thermomechanical aging of class I restorations using either the conventional incremental technique or bulk-fill technique.

Materials and methods

Cavities (Class I) were prepared on the occlusal surface of human third molars. 40 teeth were divided into four experimental groups according to the restorative technique (n = 10): G1 = 3 mm increment of Surefill SDR Flow + 1 mm Filtek P60; G2 = 3 mm increment of Filtek Bulk-Fill + 1 mm Filtek P60; G3 = Filtek P60 inserted with incremental technique; G4 = 3 mm increment of Filtek Z350 Flow XT + 1 mm increment of Filtek P60. The required restorative clinical time for each technique was marked. Specimens were submitted to thermomechanical loading (20,000 mechanical cycles—80 N/thermal cycling—5/55°C for 30 seconds). After, samples were sectioned, ratio of internal gaps to interface length (%) was recorded using dye-staining-gap technique. Data were submitted to analysis of variance (ANOVA) and Tukey's test (95% significance).

Results

There was no significant difference in gap formation and none of the groups was completely gap-free. However, a significant reduction on required restorative clinical time was observed for G1 (167 ± 7 seconds), G2 (169 ± 4 seconds), and G4 (169 ± 8 seconds) when compared with G3 (204 ± 8 seconds).

Conclusion

No significant difference in gap formation was found among bulk-fill and conventional incremental restorative technique tested; however, the use of a bulk-fill composite reduced 20% of the required restorative clinical time.

Clinical significance

None of the restorative techniques applied were able to prevent internal gap formation. The use of bulk-fill composite reduced the required clinical time to perform class I restorations.

How to cite this article

Vianna-de-Pinho MG, Rego GF, Vidal ML, Alonso RCB, Schneider LFJ, Cavalcante LM. Clinical Time Required and Internal Adaptation in Cavities restored with Bulkfill Composites. J Contemp Dent Pract 2017;18(12):1107-1111.


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