Denture base resins biocompatibility testing in vivo

  • Milena M Kostić University in Niš, Medical Faculty, Clinic of Dentistry, Department of Prosthetic Dentistry, Niš, Kragujevac
  • Stevo Najman University of Niš, Medical Faculty, Institute of Biology and Human Genetics, Niš, Serbia
  • Dragan Mihailović University of Niš, Medical Faculty, Institute of Pathology, Niš, Serbia
  • Nebojša Krunić University of Niš, Medical Faculty, Clinic of Dentistry, Department of Prosthetic Dentistry, Niš, Serbia
  • Nikola Gligorijević University of Niš, Medical Faculty, Clinic of Dentistry, Department of Dentistry, Niš, Serbia
  • Jasmina Gligorijević University of Niš, Medical Faculty, Clinic of Dentistry, Institute of Pathology, Niš, Serbia
  • Marko Igić University of Niš, Medical Faculty, Clinic of Dentistry, Department of Dentistry, Niš, Serbia
  • Nikola Marinković Military Medical Academy, Clinic of Dentistry, Department of Prosthetic Dentistry, Belgrade, Serbia
Keywords: dentures;, acrylates;, biocompatible materials;, rats.

Abstract


Background/Aim. The wearing of acrylic dentures is the cause of the inflammatory reaction of the oral mucosa. The aim of this study was to investigate the response of rat tis­sues to subcutaneous and intramuscular implantation of dif­ferent acrylic samples, by histopathological analysis of the tissue. Methods. The study included two samples of hard and three samples of soft acrylic resins (heat and cold po­lymerized), that were subcutaneously and intramuscularly implanted in rats tissues. Implantation tests were designed to test the biological response of the surrounding tissue to the tested materials after their application for the period of two weeks and the period of four months. Results. After two weeks, regardless of the type of implantation, histopa­thological analysis showed an acute inflammatory re­sponse. There was an intense hyperplasia of inflammatory cells, multiplication of connective tissue as well as formation of many new blood vessels. The highest level of inflamma­tory changes was observed after the application of cold-po­lymerized resins. A lower intensity of inflammation in the case of heat polymerised resin was the result of its more complete polymerization. After the second observation pe­riod, fibrotic capsules were formed around the implanted samples indicating a chronic course of the inflammatory process. Less visible signs of inflammation and chronicity of the processes indicate that with time, i.e. with the length of the observation period, reduces inflammation. Conclusion. The subcutaneous and intramuscular implantation of acrylic resins material samples led to inflammatory response whose intensity was decreased over time. Heat polymerized resin was a biologically more acceptable in comparison to the cold polymerized acrylates.

References

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Published
2021/01/08
Section
Original Paper