Stabilization of dentin matrix after cross-linking treatments, in vitro

Débora L.S. Scheffel, Josimeri Hebling, Régis H. Scheffel, Kelli A. Agee, Milena Cadenaro, Gianluca Turco, Lorenzo Breschi, Annalisa Mazzoni, Carlos A. De Souza Costa, David H. Pashley

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Objectives To evaluate the effect of EDC on elastic modulus (E), MMPs activity, hydroxyproline (HYP) release and thermal denaturation temperature of demineralized dentin collagen. Methods Dentin beams were obtained from human molars and completely demineralized in 10 wt% H3PO4 for 18 h. The initial E and MMP activity were determined with three-point bending and microcolorimetric assay, respectively. Extra demineralized beams were dehydrated and the initial dry mass (DM) was determined. All the beams were distributed into groups (n = 10) and treated for 30 s or 60 s with: water, 0.5 M, 1 M or 2 M EDC or 10% glutaraldehyde (GA). After treatment, the new E and MMP activity were redetermined. The beams submitted to DM measurements were storage for 1 week in artificial saliva, after that the mass loss and HYP release were evaluated. The collagen thermal denaturation temperature (TDT) was determined by DSC analysis. Data for E, MMP activity and HYP release were submitted to Wilcoxon and Kruskal-Wallis or Mann-Whitney tests. Mass loss and TDT data were submitted to ANOVA and Tukey tests at the 5% of significance. Results EDC was able to significantly increase collagen stiffness in 60 s. 10% GA groups obtained the highest E values after both 30 and 60 s. All cross-linking agents decreased MMP activity and HYP release and increased TDT temperature. Significant differences were identified among EDC groups after 30 or 60 s of cross-linking, 1 M or 2 M EDC showed the lowest MMP activity. Significance Cross-linking agents are capable of preventing dentin collagen degradation. EDC treatment may be clinically useful to increase resin-dentin stability.

Original languageEnglish (US)
Pages (from-to)227-233
Number of pages7
JournalDental Materials
Volume30
Issue number2
DOIs
StatePublished - Feb 2014

Keywords

  • Collagen
  • Cross-linkers
  • Dentin
  • EDC
  • Glutaraldehyde
  • MMPs

ASJC Scopus subject areas

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

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    Scheffel, D. L. S., Hebling, J., Scheffel, R. H., Agee, K. A., Cadenaro, M., Turco, G., Breschi, L., Mazzoni, A., De Souza Costa, C. A., & Pashley, D. H. (2014). Stabilization of dentin matrix after cross-linking treatments, in vitro. Dental Materials, 30(2), 227-233. https://doi.org/10.1016/j.dental.2013.11.007