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Influence of Different Polishing Methods on Surface Roughness and Microhardness of Dental Composites

Mierzejewska Żaneta A., Łukaszuk Kamila, Choromańska Magdalena, Zalewska Anna, Borys Jan, Antonowicz Bożena, Kulesza Ewa

Advances in Science and Technology. Research Journal

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2024

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Vol. 18, no 1

268--279

EN

The surface roughness and microhardness of dental composites greatly affects the durability of restorations. To evaluate the effect of three different polishing systems (Sof-Lex, Enhance+PoGo, Kenda) on the surface roughness and microhardness of microhybrid (Herculite XRV, Filtek Z250 and Charisma Flow) and nanohybrid (Herculite XRV Ultra, Filtek Z550 and Charisma Bulk Flow) composites resin used for dental fillings. Six different composites were used in the study. From each material, 40 cylinder-shaped samples were made. All samples were polymerized and polished using three different methods. To evaluate surface roughness a confocal laser microscope was used, and microhardness was determined using a universal Vickers hardness tester.The data were analysed using the one-way ANOVA test at a significance level of 0.05 for both tests. The smoothest surfaces in all groups of composites were obtained for control samples. Also in all groups of composite samples no statistically significant differences were found between the Sof-Lex and Enhance+PoGo. The measurement of surface roughness obtained for the Kenda system showed significantly lower values than for the other two methods. The surfaces of the control samples showed statistically significantly lower microhardness values compared to all polishing systems for all six tested resin composites, additionally no statistically significant differences were found between all finishing and polishing methods. Regardless of the finishing and polishing method used, the lowest microhardness values among microhybrid materials were found for Charisma Flow, while among nanohybrid materials the lowest values were obtained for Herculite HRV Ultra. Finishing and polishing increases the microhardness of microhybrid and nanohybrid composite resin. The use of Kenda three step polishing system resulted in smoother surface for all tested composite materials compared to the Sof-Lex and Enhance+PoGo systems, while the finishing and polishing method had little effect on the microhardness of the surface.

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Nowoczesne technologie: Chemia 4.0 - nasza teraźniejszość

Zalewska Anna, Przygudzki Marcin

Nowa Energia

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2021

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nr 5/6

16--18

PL

Transformacja cyfrowa to proces nieunikniony, który nie jest już melodią przyszłości, a stał się teraźniejszością. Świadczy o tym mnogość inwestycji firm przemysłowych w innowacje, coraz większa gama dostępnych rozwiązań oraz narzędzi 4.0, a także fakt, że transformacja cyfrowa jest jednym z sześciu głównych celów zawartych w wytycznych Unii Europejskiej na lata 2019-2024. Wspieranie takiej transformacji nigdy wcześniej nie było tak wysoko sklasyfikowane na liście europejskich priorytetów.

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Application of turbiscan lab to study the effect of emulsifier content on the stability of plant origin dispersion

Zalewska Anna, Kowalik Joanna, Grubecki Ireneusz

Chemical and Process Engineering

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2019

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Vol. 40, nr 4

399-–409

EN

The effect of emulsifier volume on emulsion system stability of plant origin being the basis of diet supplements for animals in winter season was analyzed. For this purpose, measurements of the backscattered light intensity as the function of the measuring cell height were conducted with a Turbiscan LAB optical analyzer. System stability was analyzed on the basis of Turbiscan Stability Index values. A Helos laser analyzer and a Nikon Eclipse E400 POL optical microscope were used to investigate drop size distribution and analyze microscopic pictures. It was shown that emulsion with 10% (w/w) of the emulsifier was the most stable one.

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Badania odporności korozyjnej powłok cynkowych w roztworze chlorku wapnia

Kowalik Joanna, Zalewska Anna

Inżynieria Materiałowa

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2013

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Vol. 34, nr 1

30--33

PL

W pracy przedstawiono wyniki badań odporności korozyjnej powłok cynkowych otrzymanych różnymi technologiami nanoszenia. Określono grubość otrzymanych powłok. Próbki poddano porównawczej próbie korozyjnej w obojętnej mgle solnej chlorku wapnia bez i z dodatkiem inhibitora korozji M-605 PS. Na podstawie wyników badań obliczono zmiany masy próbek i szybkość korozji powłok cynkowych w badanych warunkach. Przedstawiono je w formie graﬁcznej na rysunkach 1÷4. Podczas próby korozyjnej prowadzono oględziny wizualne, które przedstawiono na rysunkach 5 i 6. Na podstawie przeprowadzonych badań stwierdzono, że dodatek inhibitora spowodował znaczne obniżenie szybkości korozji cynku nakładanego metodą zanurzeniową i metodą natrysku cieplnego. Po zastosowaniu inhibitora M-605 PS na powierzchni badanych próbek zaobserwowano mniejsze ilości białego nalotu produktów korozji cynku.

EN

This paper presents the results of the corrosion resistance of zinc coatings obtained by different application techniques. The thickness of the coatings was determined. Samples were subjected to comparative corrosion in a neutral calcium chloride salt spray with and without the addition ofcorrosion inibitor M-605 PS. Based on the test results, the weight change of the samples was calculated and the rate of zinc coatings corrosion in the test conditions was determined. The results are presented in graphical form in Figures 1 to 4. During the corrosion test, a visual inspection was carried out, as shown in Figures 5 and 6. On the basis ofthe test results, it was found that the addition ofthe inhibitor caused a signiﬁcant reduction in the corrosion rate ofzinc applied by immersion and thermal spray. After applying inhibitor M-605 PS on the surface ofthe samples, minor amounts ofthe white dust ofzinc corrosion products were observed.