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Toughening of Dental Composites with Thiourethane-Modified Filler Interfaces.

ABSTRACT: 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.

SUBMITTER: Fugolin AP

PROVIDER: S-EPMC6381174 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Toughening of Dental Composites with Thiourethane-Modified Filler Interfaces.

Fugolin Ana P AP Sundfeld Daniel D Ferracane Jack L JL Pfeifer Carmem S CS

Scientific reports 20190219 1

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 cli ...[more]

PMID: 30783177

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Thiourethane filler functionalization for dental resin composites: Concentration-dependent effects on toughening, stress reduction and depth of cure.

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