Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends

M. Cadenaro, D. H. Pashley, G. Marchesi, M. Carrilho, F. Antoniolli, A. Mazzoni, Franklin Chi Meng Tay, R. Di Lenarda, L. Breschi

Research output: Contribution to journalArticle

45 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)1269-1274
Number of pages6
JournalDental Materials
Volume25
Issue number10
DOIs
StatePublished - Oct 1 2009

Fingerprint

Chlorhexidine
Adhesives
Resins
Hydrophilicity
Solvation
Polymer blends
Analysis of variance (ANOVA)
Calorimeters
Ethanol
Stiffness
Hydrophobic and Hydrophilic Interactions
Scanning
Polymers

Keywords

  • Chlorhexidine
  • Degree of conversion
  • Dental bonding systems
  • E-modulus
  • Polymerization

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Cadenaro, M., Pashley, D. H., Marchesi, G., Carrilho, M., Antoniolli, F., Mazzoni, A., ... Breschi, L. (2009). Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. Dental Materials, 25(10), 1269-1274. https://doi.org/10.1016/j.dental.2009.05.008

Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. / Cadenaro, M.; Pashley, D. H.; Marchesi, G.; Carrilho, M.; Antoniolli, F.; Mazzoni, A.; Tay, Franklin Chi Meng; Di Lenarda, R.; Breschi, L.

In: Dental Materials, Vol. 25, No. 10, 01.10.2009, p. 1269-1274.

Research output: Contribution to journalArticle

Cadenaro, M, Pashley, DH, Marchesi, G, Carrilho, M, Antoniolli, F, Mazzoni, A, Tay, FCM, Di Lenarda, R & Breschi, L 2009, 'Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends', Dental Materials, vol. 25, no. 10, pp. 1269-1274. https://doi.org/10.1016/j.dental.2009.05.008
Cadenaro M, Pashley DH, Marchesi G, Carrilho M, Antoniolli F, Mazzoni A et al. Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. Dental Materials. 2009 Oct 1;25(10):1269-1274. https://doi.org/10.1016/j.dental.2009.05.008
Cadenaro, M. ; Pashley, D. H. ; Marchesi, G. ; Carrilho, M. ; Antoniolli, F. ; Mazzoni, A. ; Tay, Franklin Chi Meng ; Di Lenarda, R. ; Breschi, L. / Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. In: Dental Materials. 2009 ; Vol. 25, No. 10. pp. 1269-1274.
@article{efaec639be854d849ecb2cd08876e22f,
title = "Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends",
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.",
keywords = "Chlorhexidine, Degree of conversion, Dental bonding systems, E-modulus, Polymerization",
author = "M. Cadenaro and Pashley, {D. H.} and G. Marchesi and M. Carrilho and F. Antoniolli and A. Mazzoni and Tay, {Franklin Chi Meng} and {Di Lenarda}, R. and L. Breschi",
year = "2009",
month = "10",
day = "1",
doi = "10.1016/j.dental.2009.05.008",
language = "English (US)",
volume = "25",
pages = "1269--1274",
journal = "Dental Materials",
issn = "0109-5641",
publisher = "Elsevier Science",
number = "10",

}

TY - JOUR

T1 - Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends

AU - Cadenaro, M.

AU - Pashley, D. H.

AU - Marchesi, G.

AU - Carrilho, M.

AU - Antoniolli, F.

AU - Mazzoni, A.

AU - Tay, Franklin Chi Meng

AU - Di Lenarda, R.

AU - Breschi, L.

PY - 2009/10/1

Y1 - 2009/10/1

N2 - 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.

AB - 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.

KW - Chlorhexidine

KW - Degree of conversion

KW - Dental bonding systems

KW - E-modulus

KW - Polymerization

UR - http://www.scopus.com/inward/record.url?scp=68949151823&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68949151823&partnerID=8YFLogxK

U2 - 10.1016/j.dental.2009.05.008

DO - 10.1016/j.dental.2009.05.008

M3 - Article

VL - 25

SP - 1269

EP - 1274

JO - Dental Materials

JF - Dental Materials

SN - 0109-5641

IS - 10

ER -