Toughening of Dental Composites with Thiourethane-Modified Filler Interfaces

Ana P. Fugolin, Daniel Sundfeld, Jack L. Ferracane, Carmem S. Pfeifer

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Stress of polymerization is one of the most significant drawbacks of dental resin composites, since it is related to poor marginal adaptation, postoperative pain, and secondary caries. Previous studies have shown that thiourethane oligomers incorporated into the organic matrix represents a promising strategy to reduce stress and increase fracture toughness in dental composites. However, this strategy promotes a significant increase of the viscosity system, which may represent a challenge for clinical application. The objective of this study was to functionalize the surface of inorganic filler particles with thiouretanes and evaluate the impact on mechanical properties and kinetics of polymerization. Our results showed that composites filled with thiourethane-silanized inorganic fillers showed up to 35% lower stress while doubling mechanical properties values. This was achieved with no prejudice to the viscosity of the material and following a clinically acceptable photoactivation protocol.

Original languageEnglish (US)
Article number2286
JournalScientific Reports
Issue number1
StatePublished - Dec 1 2019

ASJC Scopus subject areas

  • General


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