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Keywords = Activa Presto

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13 pages, 760 KiB  
Article
Effect of Over-the-Counter Whitening Dentifrices on the Color Stability and Microhardness of Composite Resins
by Xinnuo Yu, Maria Pilar Melo, Sofia Folguera and Carmen Llena
J. Compos. Sci. 2025, 9(7), 324; https://doi.org/10.3390/jcs9070324 - 24 Jun 2025
Viewed by 1161
Abstract
Objective: To evaluate the color stability and microhardness of resin-based bioactive composites after brushing with over-the-counter whitening toothpastes. Methods: A conventional resin (Luna 2) and two bioactive resins (Stela Mix and Activa Presto) were tested. Four toothpastes were used: Colgate Fresh Gel (control), [...] Read more.
Objective: To evaluate the color stability and microhardness of resin-based bioactive composites after brushing with over-the-counter whitening toothpastes. Methods: A conventional resin (Luna 2) and two bioactive resins (Stela Mix and Activa Presto) were tested. Four toothpastes were used: Colgate Fresh Gel (control), Colgate Max White, Yotuel, and Crest 3D White. Forty disks of each material were prepared and divided into four subgroups. The disks were brushed to simulate three months of daily brushing. Microhardness and color changes were measured before and after brushing. Color variation was calculated using the ΔEab, ΔE00, and ΔWID indexes. Wilcoxon and two-way ANOVA tests were performed (p < 0.05). Results: In the Luna 2 and Stela groups, the b* parameter decreased significantly with all toothpastes (p < 0.05), while lightness and a* remained stable with no significant differences (p > 0.05). Stela Mix and Activa Presto exhibited color changes within the “moderately unacceptable” range according to ΔE00 (>1.8 and ≤3.6). Based on the ΔWID index, Luna 2 showed the highest variation when treated with Colgate Max (2.14 ± 1.33) and the lowest in the control group (1.08 ± 0.56A), remaining within acceptable margins with all treatments. The microhardness values before/after treatment remained for Luna 2 between 77.44 and 76.97; for Stela Mix between 76.24 and 74.13; and for Activa presto between 74.5 and 71.33. Differences were not significant for any of the pastes within each composite (p > 0.05). Conclusions: The evaluated bioactive resins exhibited color changes within the moderately unacceptable range. Colgate Max White induced the most significant color changes. Microhardness was not affected by treatment with whitening toothpastes. Full article
(This article belongs to the Section Biocomposites)
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14 pages, 1633 KiB  
Article
The Influence of Ionizing Radiation on Fluoride Release from Restorative Dental Materials: A Comparative In Vitro Study
by Sara Čekalović Agović, Eva Klarić, Ana Ivanišević, Majana Soče, Timor Grego and Irena Radin Nujić
Appl. Sci. 2024, 14(21), 9701; https://doi.org/10.3390/app14219701 - 24 Oct 2024
Viewed by 1365
Abstract
To examine the effect of ionizing radiation on fluoride release from restorative dental materials, samples of Equia Forte HT, Fuji Triage, Fuji IX, Cention Forte, Activa Presto, Beautifil II, and Luminos (n = 10) were made in Teflon molds and divided into a [...] Read more.
To examine the effect of ionizing radiation on fluoride release from restorative dental materials, samples of Equia Forte HT, Fuji Triage, Fuji IX, Cention Forte, Activa Presto, Beautifil II, and Luminos (n = 10) were made in Teflon molds and divided into a control group and an experimental group. The experimental group was exposed to ionizing radiation for a total of 35 days (70 Gy, 2 Gy per day). The fluoride release was measured with a fluorine-selective electrode. The median recorded fluoride values were higher with Equia Forte HT, Fuji Triage, and Fuji IX compared to others during the entire period in both groups. With Activa Presto, a higher release of fluoride was recorded in the experimental group on the first day of irradiation, while a higher release was recorded in the control group, as well as with Luminos and Beautifil II. With Cention Forte, there was no significant difference in fluoride release between the experimental and control groups except on the sixth day. With Fuji Triage and Fuji IX, the release of fluoride was higher in the experimental group compared to the control group, while with Equia Forte HT, there was no difference between the groups. In conclusion, ionizing radiation has no major effect on fluoride release in all the tested materials. Full article
(This article belongs to the Special Issue New Materials and Techniques in Restorative Dentistry)
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26 pages, 38552 KiB  
Article
Dentine Remineralisation Induced by “Bioactive” Materials through Mineral Deposition: An In Vitro Study
by Marta Kunert, Ireneusz Piwonski, Louis Hardan, Rim Bourgi, Salvatore Sauro, Francesco Inchingolo and Monika Lukomska-Szymanska
Nanomaterials 2024, 14(3), 274; https://doi.org/10.3390/nano14030274 - 27 Jan 2024
Cited by 11 | Viewed by 4046
Abstract
This study aimed to assess the ability of modern resin-based “bioactive” materials (RBMs) to induce dentine remineralisation via mineral deposition and compare the results to those obtained with calcium silicate cements (CSMs). The following materials were employed for restoration of dentine cavities: CSMs: [...] Read more.
This study aimed to assess the ability of modern resin-based “bioactive” materials (RBMs) to induce dentine remineralisation via mineral deposition and compare the results to those obtained with calcium silicate cements (CSMs). The following materials were employed for restoration of dentine cavities: CSMs: ProRoot MTA (Dentsply Sirona), MTA Angelus (Angelus), Biodentine (Septodont), and TheraCal LC (Bisco); RBMs: ACTIVA BioACTIVE Base/Liner (Pulpdent), ACTIVA Presto (Pulpdent), and Predicta Bioactive Bulk (Parkell). The evaluation of the mineral deposition was performed through scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) on the material and dentine surfaces, as well as at the dentine–material interface after immersion in simulated body fluid. Additionally, the Ca/P ratios were also calculated in all the tested groups. The specimens were analysed after setting (baseline) and at 24 h, 7, 14, and 28 days. ProRoot MTA, MTA Angelus, Biodentine, and TheraCal LC showed significant surface precipitation, which filled the gap between the material and the dentine. Conversely, the three RBMs showed only a slight ability to induce mineral precipitation, although none of them was able to remineralise the dentine–material interface. In conclusion, in terms of mineral precipitation, modern “bioactive” RBMs are not as effective as CSMs in inducing dentine remineralisation; these latter represent the only option to induce a possible reparative process at the dentin–material interface. Full article
(This article belongs to the Special Issue Functional Biocompatible Nanomaterials)
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