http://www.cnr.it/ontology/cnr/individuo/prodotto/ID27625

Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. (Articolo in rivista)

Type

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

Label

Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. (Articolo in rivista) (literal)

Anno

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

Alternative label

Cadenaro M, Pashley DH, Marchesi G, Carrilho M, Antoniolli F, Mazzoni A, Tay FR, Di Lenarda R, Breschi L. (2009)
Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends.
in Dental materials
(literal)

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

Cadenaro M, Pashley DH, Marchesi G, Carrilho M, Antoniolli F, Mazzoni A, Tay FR, Di Lenarda R, Breschi L. (literal)

Pagina inizio

1269 (literal)

Pagina fine

1274 (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, University of Trieste, Trieste, Italy; Department of Oral Biology, School of Dentistry, Medical College of Georgia, Augusta, GA, USA; Department of Restorative Dentistry, University of Campinas, Piracicaba School of Dentistry, São Paulo, Brazil; GEO/UNIBAN, Bandeirante University of São Paulo, São Paulo, Brazil; Department of SAU&FAL, University of Bologna, Bologna, Italy; IGM-CNR, Unit of Bologna c/o IOR, Bologna, Italy (literal)

Titolo

Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. (literal)

Abstract

OBJECTIVES: This study examined the effect of chlorhexidine (CHX) content on degree of conversion (DC) and E-modulus of experimental adhesive blends. The hypothesis tested was that increasing concentrations of CHX result in decreased DC and E-modulus in relation to adhesive hydrophilicity. METHODS: Experimental adhesive blends with increasing hydrophilicity R2 (70% bisGMA, 28.75% TEGDMA); R3 (70% BisGMA, 28.75% HEMA); R4 (40% BisGMA, 30% TCDM, 28.75% TEGDMA); R5 (40% BisGMA, 30% BisMP, 28.75% HEMA) and different CHX concentrations (1 and 5%) were analyzed. 5% CHX could not be dissolved in R2. A differential scanning calorimeter was used to measure the DC of resin blends. Photopolymerized disks of the experimental comonomer mixtures (n=10/gp) were used to measure the E-modulus of each specimen using a biaxial flexure test. Data were analyzed with two-way ANOVA (resin type and CHX concentration) and Tukey's post hoc test. RESULTS: The addition of 1% CHX did not significantly alter the DC of R2 and R3. Significant decrease in R3 DC values was observed when 5% CHX was added. CHX significantly increased the DC of R4 and R5. 1% CHX reduced the E-modulus of all resins (p<0.05) except for R2, in which the E-modulus was significantly increased (p<0.05). 5% CHX significantly reduced the E-modulus of resins R3 to R5 (p<0.05). SIGNIFICANCE: In conclusion, increasing concentrations of CHX dissolved in resin blends had little adverse effect on DC but decreased the E-modulus 27-48% compared to controls. Solvation of CHX in ethanol prior to incorporation of CHX into R2 may permit higher CHX concentrations without lower polymer stiffness. (literal)

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