Sterilization of Grafts Used in Periodontology by Gamma and Microwave Radiation

Abstract

BARGH, S, Studies on Sterilization of Grafts Used in Periodontology by Gamma and Microwave Radiation. Hacettepe University, Institute of Health Sciences, Radiopharmacy Program, Master of Science Thesis, Ankara, 2018. The aim of this work is to research the sterilization of grafts (bone and dermal grafts from human, horse and porcine sources) used in the dental periodontal operations and because of their direct contact with the mucosal tissues and blood, it is essential to assure a complete sterilization. Moreover, the quality and the efficiency of the materials after sterilization is another aspect of this study taken into consideration. In this study, the differences made by gamma radiation sterilization were investigated by doing some different analyses like (organoleptic, FTIR, TGA, SEM, SAXS and ESR) and microbiologicalal tests like (sterility, pyrogenity and determination of the Sterility Assurance Level). All tests done by gamma radiation were also performed by microwave irradiation on the grafts; then the results were compared with the gamma radiation results. Based on the results, both gamma radiation and microwave sterilization have been found effective and appropriate for dental grafts used in this study even at low irradiation doses and time as 5 kGy for gamma and 3 min for microwave, respectively. Additionally, as a new research topic, microwave radiation sterilization was evaluated as a good and practical option for grafts’ sterilization.