2023

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https://ela.kpi.ua/handle/123456789/58441

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Перегляд 2023 за Автор "Golovchanska, О. D."

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    Electromagnetic properties of cements for fixation of orthopedic constructions
    (КПІ ім. Ігоря Сікорського, 2023) Yanenko, О. P.; Shevchenko, К. L.; Golovchanska, О. D.; Symonenko, V. S.
    Introduction. In practical dentistry, a significant number of various materials are used - for filling teeth, for implant restorative surgery, as well as materials for prosthetics. In this case, metals, dielectrics and their combinations are used. The article is devoted to the results of the study of electromagnetic properties of a group of dental materials - fixing cements, which belong to dielectric materials. Theoretical and experimental studies of EMC materials from the arsenal of maxillofacial reconstructive and restorative surgery were also conducted. Significant EMC deviations were detected in some materials. Scientific results of experimental studies and relevant recommendations are presented in a number of authors publications both in Ukraine and abroad Main purpose of this study. Usually, the orthopedic constructions and the fixation cement are in physical contact with both the patient's hard and soft tissues. Since dielectric materials at a human body temperature of 310K form their own electromagnetic radiation (EMR), it is important to ensure their electromagnetic compatibility - the coincidence of EMR with biological tissues adjacent to the implant to exclude the appearance of complications during their long-term use. A highly sensitive (10-14 W) microwave radiometric system was used for the measurements. In process of research, the five most commonly used cement samples in orthopedics were studied. Therefore, the purpose of this study is to deter-mine the radiative capacity of cement as a material widely used in dental practice and to evaluate their level of electromagnetic compatibility with contacting biological tissues. Conclusions. 1. In the process of experimental and computational studies, the emissivity coefficients M of 5 cement samples were determined, which range from 0.13 to 0.63 units.1. 2. The first three samples (№№ 3-5) have a high level of electromagnetic compatibility (60...98 %), samples (№№ 6, 7) show much less coincidence with the EMR of the human body. 3. The results of the conducted research can be used by orthopedic specialists to select materials with greater electromagnetic compatibility.