Comparative effectiveness of root canal machining with modern ni-ti tools

Орехова, Л. Ю.; Вашнева, В. Ю.; Порхун, Т. В.; Зайцева, Ю. А.

doi:10.36377/1683-2981-2020-18-2-10-15

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…д. ), предназначенных для совершения ротационных, реципрокных, комбинированных движений, ставит перед практикующими врачами-стоматологами нелегкую задачу выбора оптимальных инструментов, обеспечивающих наилучший клинический результат в ближайшем и отдаленном периодах [2][3][4][5].…”

Section: ______________________ Abstract ____________________________...unclassified

Особенности Механической Обработки Корневых Каналов Системами Вращающихся Инструментов S-Профиля

Данилова¹,

Зиновенко²,

Novak³

et al. 2021

Стоматология. Эстетика. Инновации

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Обзорная статья посвящена проблеме выбора оптимальных вращающихся инструментов для механической обработки корневых каналов. В статье описаны представители файлов с s-образным поперечным сечением. Такой дизайн рабочей части обеспечивает инструментам хорошую режущую эффективность, уменьшенную силу трения, способность выводить дентинные опилки в апикальном направлении. Однако системы файлов с s-образным поперечным сечением, выпущенные разными производителями, существенно отличаются друг от друга. Для более ранних версий вращающихся инструментов s-стиля характерны линейки, состоящие из 4–5 инструментов, что обуславливает многоступенчатый подход к обработке корневых каналов. Современные вращающиеся инструменты, базовые комплекты которых состоят в среднем из 3 файлов, позволяют производить манипуляции 2–3 инструментами. Кроме того, улучшенные механические свойства благодаря специальной термической обработке никельтитанового сплава позволяют применять данные файлы многократно, а также в каналах со сложной анатомией. Преобладающая 04-конусность данных инструментов соответствует принципам рационального препарирования корневого канала и биологической целесообразности. The review article is devoted to the problem of choosing the optimal rotating instruments for mechanical processing of root canals. The article describes representatives of files with an s-shaped cross-section. This design of the working part provides the instruments with good cutting efficiency, reduced friction force, and the ability to remove dentin chips in the apical direction. However, s-shaped file systems from different manufacturers differ significantly from each other. Earlier versions of the s-style rotary instruments feature a ruler of 4 to 5 instruments, resulting in a multi- step approach to root canal treatment. Modern rotating instruments, the basic sets of which consist, on average, of 3 files, allow manipulation of 2–3 instruments. In addition, the improved mechanicalproperties, due to the special heat treatment of the nickel-titanium alloy, make it possible to use these files multiple times, as well as in canals with complex anatomy. The predominant 04 taper of these instruments corresponds to the principles of rational root canal preparation and biological expediency.

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Section: ______________________ Abstract ____________________________...unclassified

Особенности Механической Обработки Корневых Каналов Системами Вращающихся Инструментов S-Профиля

Данилова¹,

Зиновенко²,

Novak³

et al. 2021

Стоматология. Эстетика. Инновации

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“…In a number of studies, clinical bases with patients were used to clarify the results of the experiment, and extracted teeth were also used to test the torsion load on natural preparations [2, 7,8,[32][33][34][35].…”

Section: том 19 № 4/2021mentioning

confidence: 99%

The analysis of research methods and results on resistance of nickel-titanium endodontic instruments to torsion load: the systematic review

et al. 2021

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Relevance. The objective of this study was to analyze current data concerning research methods and results on resistance of nickel-titanium endodontic instruments to torsion load in order to minimize complications of dental root canal treatment. The use of the nickel -titanium endodontic instruments is a special importance to ensure high-quality dental root canal treatment; it prevents the further contamination of the canals with microorganisms. However, these instruments can form a fracture under torsional load which leads to further complications.Aim. The analysis of research methods and results on resistance of nickel-titanium endodontic instruments to torsion load for minimization complications.Materials and methods. A series of publications in the electronic databases such as Google Scholar, Pub Med was analyzed in the course of a systematic review of the literature. The articles dealing with nickel-titanium endodontic instruments and torsion load that directly influences the quality of dental root canal treatment were included in the paper.Results. 73 articles were viewed during the review. Having analyzed the literature for inclusion criteria, the total number of publications has become 51. There were 16 main methods which demonstrated the influence of torsion load on endodontic instruments. These methods were summarized in the Table 1.Conclusions. As regards literature data, there are a various number of methods which converge to one conclusion: nickel-titanium instruments cannot fully resist torsion load. Fracture is caused approximately in 0,5-5% of cases.

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Temperature effect on thermal changes and phase analysis of 3Y-TZP zirconia restorations

Mordanov

Khabadze

Nazarova

et al. 2022

NAMJ

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This study aimed to investigate the effect of final sintering on the thermal properties and phase composition of yttrium-stabilized zirconium dioxide. Totally 15 yttrium-stabilized zirconium oxide standard ovoid samples were studied (3Y-TZP, IPS e.max ZirCAD LT, Ivoclar Vivadent, Schaan, Liechtenstein). This material contains the following components: ZrO2 - 87.0 - 95.0%, Y2O3 - 4.0 - 6.0%, HfO2 - 1.0 - 5.0%, Al2O3 - 0.0 - 1, 0%. Initially, X-ray diffraction analysis was performed. After that, differential scanning calorimetry was carried out up to a temperature of 900°C. X-ray diffraction analysis was performed to assess the effect of the firing process on the phase analysis of zirconia samples (Selected samples were tested on an X-ray diffraction instrument (EMPYREAN, PANalytical, Lelyweg, The Netherlands) The thermal changes study in zirconia samples resulting from repetitive firing processes was performed then. Samples were placed in a differential scanning calorimeter (NETZSCH STA 409 PC Luxx, Bavaria, Germany) and heated at a rate of 10°C/min from 50°C to 900°C.) Then, differential scanning calorimetry data (the mass and structural changes of zirconia samples depending on temperature) was recorded. The percentage of the monoclinic phase increases on average from 3.6% to 7.5%, but this difference is not statistically significant (p=0.1). Two exothermic peaks were observed when the samples were heated from 50°C to 900°C. The final firing of 3Y-TZP zirconium crown up to 900°C slightly increases the content of the monoclinic phase and causes exothermal changes.

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Comparative effectiveness of root canal machining with modern ni-ti tools

Cited by 3 publications

References 14 publications

Особенности Механической Обработки Корневых Каналов Системами Вращающихся Инструментов S-Профиля

Особенности Механической Обработки Корневых Каналов Системами Вращающихся Инструментов S-Профиля

The analysis of research methods and results on resistance of nickel-titanium endodontic instruments to torsion load: the systematic review

Temperature effect on thermal changes and phase analysis of 3Y-TZP zirconia restorations

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