Перегляд за Автор "Vorobets, Anna"

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    Comparative analysis of endurance cements for the fixation of non-removable orthopedic constructions under the action of cyclic compression
    (Aluna Publishing, 2022-04) Hasiuk, Petro; Odzhubeiska, Olga; Vorobets, Anna; Korol, Dmytro; Dzetsiukh, Tetiana; Kindiy, Dmytro; Гасюк, Петро Анатолійович; Оджубейська, Ольга Дмитрівна; Воробець, Анна Богданівна; Король, Дмитро Михайлович; Дзецюх, Тетяна Ігорівна; Кіндій, Дмитро Данилович
    The aim: To conduct studies of the physical and mechanical properties of cements for fixation, namely the duration of cement samples under cyclic compression. Materials and methods: We have conducted a study of 6 cements for permanent fixation of fixed structures of dentures. To study the duration of cements under cyclic compression, a special stand was used, which allows testing samples for cyclic compression with a load frequency of 5.4 Hz or 324 cycles per minute and an increase in compression in a cycle from 10 to 100 kg/s. Results: Comparative analysis of the mechanical properties in compression of dental cements for permanent fixation showed that the obtained deformation curves differ significantly in each of the cement samples used in the study. Conclusions: The results of the study of the physical and mechanical properties of cements indicate that the most optimal complex of properties is possessed by the zincphosphate cement Unitsem and glass ionomer cements Cemion and Fuji I. This is most clearly confirmed when studying the duration of cement samples under cyclic compression, which simulates a real situation.
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    Документ
    Comparative evaluation of histotoxicity indicators of metal alloys for the manufacture of metal ceramic dental constructions
    (Aluna Publishing, 2021-09) Hasiuk, Petro A.; Ramus, Mykhailo; Vorobets, Anna; Tkachenko, Iryna; Dzetsiukh, Tetiana; Kalashnikov, Dmytro; Rosolovska, Svitlana; Гасюк, Петро Анатолійович; Рамусь, Михайло Олександрович; Калашніков, Дмитро Вікторович; Ткаченко, Ірина Михайлівна
    The aim: To carry out a comparative assessment of metal alloys for the manufacture of metal-ceramic constructions of dentures by determining the indicator of their histotoxicity. Materials and methods: To identify the effect of metal alloys on cobalt and nickel bases on the tissue of organism, we carried out an experimental-morphological study of standard samples of metal alloys “Shot-alloy”, “Remanium-2000”, “Cerium”, “Dent-NCB”, “Cellite-N”. Results: A careful histological analysis of the capsules formed around the metal alloy samples during two periods of the experiment showed that the healing time of the subcutaneous tissue was not the same. The most complete healing, that is, the formation of mature fibrous connective tissue, occurred during the implantation of the cobalt based alloy “Remanium-2000” and the capsule formed at the end of the experiment around the implanted sample from the “Shot-alloy” alloy, and during the implantation of the “Cerium” alloy, healing the wound surface and the formation of a connective tissue capsule occurs fully than in previous cases. Conclusions: The analysis of the performed experiment testifies in favor of the point of view that the speed and quality of healing of damaged subcutaneous tissue upon the introduction of implanted research alloys depend largely on the individual chemical components that make up the alloys, or on their combination.