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Related Experiment Videos

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

M Mattioli-Belmonte1, D Natali, G Tosi

  • 1Department of Molecular Pathology and Innovative Therapies-Histology, Marche Polytechnic University, Ancona, Italy. m.mattioli@univpm.it

The International Journal of Artificial Organs
|January 11, 2007
PubMed
Summary

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Different dental restorative material finishing techniques were tested for their effect on UV-aged composite resins. Identoflex rubbers (ID) offered a balance of polymerization and biocompatibility, while Sof-Lex Pop-on XT discs (SF) and Enhance System (EN) showed better biological interactions.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Surface Chemistry

Background:

  • Dental composite resins are widely used restorative materials.
  • Surface properties of dental composites influence their clinical performance and biocompatibility.
  • Artificial aging, such as UV irradiation, can degrade resin-based materials.

Purpose of the Study:

  • To evaluate the impact of various finishing and polishing procedures on Filtek Z250 FZ ESPE composite resin.
  • To investigate the effects of artificial aging (UV irradiation) on the material's surface and cell behavior.
  • To assess the influence of finishing techniques on photodegradation pathways.

Main Methods:

  • 96 specimens of Filtek Z250 FZ ESPE were prepared and divided into four groups: no treatment, Identoflex rubbers (ID), Enhance System (EN), and Sof-Lex Pop-on XT discs (SF).

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  • Surface morphology was analyzed using Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM).
  • Fourier-transform infrared spectroscopy (FTIR), biocompatibility, and bacterial adhesion tests were conducted.

    • Main Results:

    • The Identoflex rubbers (ID) procedure demonstrated an acceptable balance between polymerization efficiency and biocompatibility, both before and after artificial aging.
    • Sof-Lex Pop-on XT discs (SF) and Enhance System (EN) techniques exhibited superior interactions with the biological environment.
    • UV artificial aging accelerated surface degradation, potentially reducing mechanical properties and increasing toxic free radical release.

    Conclusions:

    • UV artificial aging significantly impacts dental restorative materials, accelerating degradation and potentially compromising mechanical integrity and biocompatibility.
    • While finishing and polishing procedures did not show differences in photodegradation pathways, they influenced surface characteristics and biological interactions.
    • Further advancements in dental restorative materials are necessary to mitigate long-term biological damage caused by aging effects.