Resin-based dentin restorative materials under accelerated ageing: Bio-functional behavior

Monica Mattioli-Belmonte, D. Natali, G. Tosi, P. Torricelli, I. Totaro, A. Zizzi, M. Fini, S. Sabbatini, G. Giavaresi, G. Biagini

Research output: Contribution to journalArticlepeer-review

Abstract

Object: The aim of the present study was the evaluation of the effect of different polishing and finishing procedures on Filtek Z250 FZ ESPE restorative material. Particularly, the consequence of artificial aging (UV-irradiation) on this resin-based dental material was investigated determining also its outcome on cell behavior. Methods: 96 specimens of restorative material were prepared using a light emitting diode curing unit and randomly divided into four finishing and polishing groups: (I) No treatment (FZ); (II) Identoflex rubbers (ID); (III) Enhance System (EN) and (IV) Sof-Lex Pop-on XT discs (SF). The surface morphology of native and artificially aged materials was assessed with Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). FTIR and biological (biocompatibility and bacterial adhesion) analyses were also performed. Results: Among all, the ID procedure represented an acceptable compromise for efficiency of polymerization and biocompatibility both before and after artificial ageing. SF and EN techniques showed better interactions with the biological environment. Conclusion: UV artificial ageing of the tested specimens has shown an acceleration of the surface degrading processes, favoring a possible decrease in the mechanical properties and the release of toxic free radicals. Finishing and polishing procedure seemed to affect the photodegrading pathways, even though no differences among the techniques were observed. As the cytotoxicity of materials undergoing accelerated aging is relevant, further improvement of dental restorative materials are required to limit the long-term biological damage.

Original languageEnglish
Pages (from-to)1000-1011
Number of pages12
JournalInternational Journal of Artificial Organs
Volume29
Issue number10
Publication statusPublished - Oct 2006

Keywords

  • AFM
  • Artificial aging
  • Bacterial adhesion
  • Cell culture
  • EDX
  • FT-IR
  • Restorative material

ASJC Scopus subject areas

  • Biophysics

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