http://www.cnr.it/ontology/cnr/individuo/prodotto/ID27590

Flowability of composites is no guarantee for contraction stress reduction. (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Flowability of composites is no guarantee for contraction stress reduction. (Articolo in rivista) (literal)

Anno

2009-01-01T00:00:00+01:00 (literal)

Alternative label

Cadenaro M, Marchesi G, Antoniolli F, Davidson C, De Stefano Dorigo E, Breschi L. (2009)
Flowability of composites is no guarantee for contraction stress reduction.
in Dental materials
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Cadenaro M, Marchesi G, Antoniolli F, Davidson C, De Stefano Dorigo E, Breschi L. (literal)

Pagina inizio

649 (literal)

Pagina fine

654 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

25 (literal)

Rivista

Dental materials (Rivista)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Department of Biomedicine, Unit of Dental Sciences and Biomaterials, University of Trieste, Via Stuparich, 1, I-34125 Trieste, Italy; Department of Dental Materials Science, University of Amsterdam, Louwesweg 1 1066EA Amsterdam, The Netherlands; IGM-CNR, Unit of Bologna c/o IOR, Bologna, Italy (literal)

Titolo

Flowability of composites is no guarantee for contraction stress reduction. (literal)

Abstract

OBJECTIVES: The purpose of this study was to measure the contraction stress development of three flowable resin-composite materials (Grandio Flow, VOCO GmbH, Cuxhaven, Germany; Tetric Flow, Ivoclar Vivadent, Schaan, Liechtenstein; Filtek Supreme XT Flowable Restorative, 3M ESPE, ST. Paul, MN, USA) and an universal micro-hybrid composite resin (Filtek Z250, 3M ESPE, St. Paul, MN, USA) during photopolymerization with a halogen curing light, using a novel stress-measuring gauge. METHODS: Curing shrinkage stress was measured using a stress-analyzer. Composites were polymerized with a halogen curing unit (VIP, Bisco Inc., Schaumburg, IL, USA) for 40s. The contraction force (N) generated during polymerization was continuously recorded for 180s after photo-initiation. Contraction stress (MPa) was calculated at 20s, 40s, 60s, 120s and 180s. Data were statistically analyzed. RESULTS: Filtek Supreme XT Flowable Restorative exhibited the highest stress values compared to other materials (p<0.05), while the lowest values were recorded with Tetric Flow (p<0.05). Tetric Flow was also the only flowable composite showing stress values lower than the conventional composite Filtek Z250 (p<0.05). SIGNIFICANCE: Flowable composites investigated with this experimental setup showed shrinkage stress comparable to conventional resin restorative materials, thus supporting the hypothesis that the use of flowable materials do not lead to marked stress reduction and the risk of debonding at the adhesive interface as a result of polymerization contraction is similar for both type of materials (literal)

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