Environmental Ageing and its Effect on Compressive Properties of Dental Composite

Ksenija Priladiša, Jurģis Siliņš, Tatjana Glaskova-Kuzmina, Jevgenijs Proskurins, Sandra Bērziņa, Elizabete Jaunozola

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Abstract

Dental composite materials (CM) are widely
used in dentistry for restorations. The aim of this study was to determine how compressive properties of commercially available dental CM change in simulated intraoral conditions. The investigated material was 3M ESPE Filtek™ Ultimate A2 Enamel Shade that is widely used in dental clinic and preclinical studies for anterior
and posterior restorations. First, the compressive properties of dental composite were determined in uncondensed state. The compressive modulus, strength and maximal deformation were evaluated from the stressstrain curves obtained for the prismatic CM specimens. The specimens were immersed in distilled water (pH = 6), water and vinegar solution (pH = 4), and alkaline mineral water (pH = 8) at 50 C until equilibrium moisture content. Then, the mechanical testing in
compression was repeated. It was experimentally confirmed that the storage in simulated intraoral conditions caused a significant reduction of compressive properties of the dental CM, which can negatively influence the lifespan of the restoration. The strength and
compressive modulus of the moistened samples were reduced by 27% and 25%, accordingly, but the maximal deformation was increased by 0.4% in comparison with the unconditioned samples. The CM stored in solution with pH = 8 had the highest elastic modulus and strength and the lowest maximal deformation in comparison with
the CM stored in more acidic solutions (pH is 4 and 6), indicating to lower inner degradation phenomena of the dental CM.
Original languageEnglish
Title of host publicationMedical Physics in the Baltic States
Subtitle of host publicationProceedings of the 14 th International Conference on Medical Physic
EditorsDiana Adlienė
Place of PublicationKaunas
PublisherKaunas University of Technology
Pages105-108
Publication statusPublished - 2019
Event14th International Conference on Medical Physics - Kaunas, Lithuania
Duration: 7 Nov 20199 Nov 2019
Conference number: 14

Publication series

NameMEDICAL PHYSICS IN THE BALTIC STATES
ISSN (Print)1822-5721

Conference

Conference14th International Conference on Medical Physics
CountryLithuania
CityKaunas
Period7/11/199/11/19

Keywords

  • dental composite
  • compressive properties
  • environmental ageing
  • moisture and temperature effects
  • pH factor

Field of Science

  • 3.2 Clinical medicine
  • 2.5 Materials emgineering

Publication Type

  • 3.1. Articles or chapters in proceedings/scientific books indexed in Web of Science and/or Scopus database

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