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Effect of Hydrothermal Factors on the Microhardness of Bulk-Fill and Nanohybrid Composites

cris.lastimport.scopus2024-09-19T01:30:51Z
dc.abstract.enThis study evaluates the effect of aging in artificial saliva and thermal shocks on the microhardness of the bulk-fill composite compared to the nanohybrid composite. Two commercial composites, Filtek Z550 (3M ESPE) (Z550) and Filtek Bulk-Fill (3M ESPE) (B-F), were tested. The samples were exposed to artificial saliva (AS) for one month (control group). Then, 50% of the samples from each composite were subjected to thermal cycling (temperature range: 5–55 ◦C, cycle time: 30 s, number of cycles: 10,000) and another 50% were put back into the laboratory incubator for another 25 months of aging in artificial saliva. The samples’ microhardness was measured using the Knoop method after each stage of conditioning (after 1 month, after 10,000 thermocycles, after another 25 months of aging). The two composites in the control group differed considerably in hardness (HK = 89 for Z550, HK = 61 for B-F). After thermocycling, the microhardness decrease was for Z550 approximately 22–24% and for B-F approximately 12–15%. Hardness after 26 months of aging decreased for Z550 (approximately 3–5%) and B-F (15–17%). B-F had a significantly lower initial hardness than Z550, but it showed an approximately 10% lower relative reduction in hardness.
dc.affiliationTransportu i Informatyki
dc.contributor.authorDaniel Pieniak
dc.contributor.authorAgata M. Niewczas
dc.contributor.authorKonrad Pikuła
dc.contributor.authorLeszek Gil
dc.contributor.authorAneta Krzyzak
dc.contributor.authorKrzysztof Przystupa
dc.contributor.authorPaweł Kordos
dc.contributor.authorOrest Kochan
dc.date.accessioned2024-04-22T09:25:12Z
dc.date.available2024-04-22T09:25:12Z
dc.date.issued2023
dc.description.abstract<jats:p>This study evaluates the effect of aging in artificial saliva and thermal shocks on the microhardness of the bulk-fill composite compared to the nanohybrid composite. Two commercial composites, Filtek Z550 (3M ESPE) (Z550) and Filtek Bulk-Fill (3M ESPE) (B-F), were tested. The samples were exposed to artificial saliva (AS) for one month (control group). Then, 50% of the samples from each composite were subjected to thermal cycling (temperature range: 5–55 °C, cycle time: 30 s, number of cycles: 10,000) and another 50% were put back into the laboratory incubator for another 25 months of aging in artificial saliva. The samples’ microhardness was measured using the Knoop method after each stage of conditioning (after 1 month, after 10,000 thermocycles, after another 25 months of aging). The two composites in the control group differed considerably in hardness (HK = 89 for Z550, HK = 61 for B-F). After thermocycling, the microhardness decrease was for Z550 approximately 22–24% and for B-F approximately 12–15%. Hardness after 26 months of aging decreased for Z550 (approximately 3–5%) and B-F (15–17%). B-F had a significantly lower initial hardness than Z550, but it showed an approximately 10% lower relative reduction in hardness.</jats:p>
dc.identifier.doi10.3390/ma16052130
dc.identifier.issn1996-1944
dc.identifier.urihttps://repo.akademiawsei.eu/handle/item/192
dc.languageen
dc.pbn.affiliationinformation and communication technology
dc.relation.ispartofMaterials
dc.rightsCC-BY
dc.subject.enbulk-fill dental composites
dc.subject.enmicrohardness
dc.subject.enthermocycling
dc.subject.enhydrothermal degradation
dc.titleEffect of Hydrothermal Factors on the Microhardness of Bulk-Fill and Nanohybrid Composites
dc.typeReviewArticle
dspace.entity.typePublication
oaire.citation.issue5
oaire.citation.volume16