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Maia RR, Reis RS, Moro AF, et al. Properties evaluation of silorane, low-shrinkage, non-flowable and flowable resin-based composites in dentistry. PeerJ. 2015;3:e864doi: 10.7717/peerj.864.
Maia, R. R., Reis, R. S., Moro, A. F., Perez, C. R., Pessôa, B. M., & Dias, K. R. (2015). Properties evaluation of silorane, low-shrinkage, non-flowable and flowable resin-based composites in dentistry. PeerJ, 3e864. https://doi.org/10.7717/peerj.864
Maia, Rodrigo R, et al. "Properties evaluation of silorane, low-shrinkage, non-flowable and flowable resin-based composites in dentistry." PeerJ vol. 3 (2015): e864. doi: https://doi.org/10.7717/peerj.864
Maia RR, Reis RS, Moro AF, Perez CR, Pessôa BM, Dias KR. Properties evaluation of silorane, low-shrinkage, non-flowable and flowable resin-based composites in dentistry. PeerJ. 2015 Jun 09;3:e864. doi: 10.7717/peerj.864. eCollection 2015. PMID: 26082866; PMCID: PMC4465949.
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PeerJ. 2015 Jun 09;3:e864. doi: 10.7717/peerj.864. eCollection 2015.

Properties evaluation of silorane, low-shrinkage, non-flowable and flowable resin-based composites in dentistry.

PeerJ

Rodrigo R Maia, Rodrigo S Reis, André F V Moro, Cesar R Perez, Bárbara M Pessôa, Katia R H C Dias

Affiliations

  1. Department of Operative Dentistry, University of Iowa , Iowa City , USA.
  2. Pontificial Catholic University , Rio de Janeiro, RJ , Brazil.
  3. Department of Dentistry, State University of Rio de Janeiro , Rio de Janeiro, RJ , Brazil.
  4. Department of Dental Clinic, Federal University of Rio de Janeiro , Rio de Janeiro, RJ , Brazil.

PMID: 26082866 PMCID: PMC4465949 DOI: 10.7717/peerj.864

Abstract

Purpose. This study tested the null hypothesis that different classes of direct restorative dental materials: silorane-based resin, low-shrinkage and conventional (non-flowable and flowable) resin-based composite (RBC) do not differ from each other with regard to polymerization shrinkage, depth of cure or microhardness. Methods. 140 RBC samples were fabricated and tested by one calibrated operator. Polymerization shrinkage was measured using a gas pycnometer both before and immediately after curing with 36 J/cm(2) light energy density. Depth of cure was determined, using a penetrometer and the Knoop microhardness was tested from the top surface to a depth of 5 mm. Results. Considering polymerization shrinkage, the authors found significant differences (p < 0.05) between different materials: non-flowable RBCs showed lower values compared to flowable RBCs, with the silorane-based resin presenting the smallest shrinkage. The low shrinkage flowable composite performed similarly to non-flowable with significant statistical differences compared to the two other flowable RBCs. Regarding to depth of cure, low-shrinkage flowable RBC, were most effective compared to other groups. Microhardness was generally higher for the non-flowable vs. flowable RBCs (p < 0.05). However, the values for low-shrinkage flowable did not differ significantly from those of non-flowable, but were significantly higher than those of the other flowable RBCs. Clinical Significance. RBCs have undergone many modifications as they have evolved and represent the most relevant restorative materials in today's dental practice. This study of low-shrinkage RBCs, conventional RBCs (non-flowable and flowable) and silorane-based composite-by in vitro evaluation of volumetric shrinkage, depth of cure and microhardness-reveals that although filler content is an important determinant of polymerization shrinkage, it is not the only variable that affects properties of materials that were tested in this study.

Keywords: Composite resin; Dental material; Depth of cure; Mechanical properties; Microhardness; Polymerization shrinkage

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