Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"ph- cycling"”.
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Primary Coronal Caries Prevention with Silver Diamine Fluoride – Investigations into Efficacy and Mode of Action
… remineralization using chemical, biofilm and pH-cycling models. In both chemical demineralization and pH-cycling models there were no statistically significant differences between SDF and SDF+KI in preventing coronal caries. In the biofilm model, however, SDF+KI was significantly less …
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Anti-Caries Efficacy of Fluoride at Increasing Maturation of a Microcosm Biofilm
… and mineral saturation; dental substrate types; pH cycling protocol characteristics. In the second aim, we used the developed model to evaluate the changes in the anti-caries efficacy of three fluoride compounds (Sodium fluoride (NaF); Stannous fluoride (SnF2); Amine fluoride (AmF); and deionized …
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The Synthesis of Succinic Acid and its Extraction From Fermentation Broth Using a Two-Phase Partitioning Bioreactor
… account for 70% of total production costs. Two-Phase Partitioning Bioreactors (TPPBs) can increase volumetric productivity through in-situ product removal, although SA uptake by polymers requires a pH below the pKA2 of SA (4.2). Sparging CO2 gas into the bioreactor was proposed to temporarily …
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The influence of baseline hardness and chemical composition on enamel demineralization and subsequent remineralization
… enamel with higher contents of calcium (Ca), phosphorus (P) and fluorine (F) coupled with lower contents of carbonate (C), magnesium (Mg) and nitrate (N) was found to be more resistant to demineralization. Additionally, the hardness of dental enamel was found to have a strong correlation with …
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Efeito de diferentes protocolos de envelhecimento e do sistema de fresagem na rugosidade superficial de uma cerâmica de zircônia
… groups); CADaut and MADaut (autoclave); CADph and MADph: pH cycling during eight days and CADtc and MADtc: thermal cycles between 5° and 55°C (12,000 cycles). After treatments, the surface roughness (Ra) was obtained through a digital optical profiler and analysis of x-ray diffraction was …
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Efficacy of Curodont in Managing Incipient Caries in Primary Teeth
… Following treatment, all samples underwent pH cycling for 7 days to simulate a high-caries-risk oral environment. Specimens were then sectioned, and Knoop microhardness values were measured and calculated (25gf; 10 sec) beginning 25 µm below the outer enamel surface and extending in 25 µm …
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Microfluidic platforms to evaluate the effects of drugs on fertility and proteins on cancer progression – a focus on cisplatin, alpha-smooth muscle actin, and glial cell line-derived neurotrophic factor
… of in vitro systems that can mimic organ physiology and allow studying the progression of diseases such as cancer is necessary to get reliable information about cell responses and test drug efficacy and toxicity. Classical cell culture systems facilitate a wide range of clinical in vitro …
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Impact of atmospheric cycling on the release of iron and manganese into seawater from Saharan soil particles
Atmospheric transported dust is a major source of iron, manganese and other nutrients to the ocean. During atmospheric transport, dust containing iron and manganese undergoes cloud processes that can increase the reactivity and solubility of iron and manganese species when they enter into seawater. …
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Remineralisierendes Potential neuartiger zahnärztlicher Lacke
… Fluoridlacke appliziert: a) Natriumfluorid (Duraphat, 22.600 ppm F), b) Natriumfluorid in Kombination mit Kalziumfluorid (Biophat, 45.200 ppm F-), c) Natriumfluorid in Kombination mit Trikalziumphosphat (Clinpro White Varnish Mint, 22.600 ppm F-), d) Natriumfluorid in Kombination mit Casein …
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Relative fluoride response of caries lesions created in fluorotic and sound teeth studied underremineralizing conditions
… formation and progression. The chemical, morphological, and histologic characteristics of teeth with fluorosis may alter the response of enamel to fluoride during the caries process. However, the effectiveness of fluoride in fluorosed teeth has not been thoroughly studied. Therefore, the …
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Comparative Enamel Remineralization Using SDF, Fluoride Varnish, and Curodont™
… SDF, Curodont™, and FV, specimens underwent a pH cycling for seven days to simulate a cariogenic environment. The treated specimens were sectioned and evaluation included cross-sectional Knoop microhardness (CSMH) testing at depths of 25–225 µm to assess mechanical properties. Additionally, …
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Effect of Bottled Water and Fluoride Toothpaste Usage on Caries Lesion Remineralization
… toothpaste, yielding 10 groups. Specimens were pH-cycled for 10 days with the daily regimen comprised of twice daily toothpaste slurry, with four exposures to water in between. VHN was measured, again, and the difference calculated (ΔVHN). Data were analyzed using two-way ANOVA at a 5-percent …
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Die Erbium-Laser-präparierte Kavität - Randständigkeit von Kompositversorgungen und Säureresistenz der Kavitätenränder
The intent of this study was to examine the quality of the margins of composite fillings in Er,Cr:YSGG laser-prepared cavities in comparison to conventionally prepared and conditioned fillings. Another aim was to establish wether cavity preparation by means of an erbium laser with efficient water …
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Self-Organized Nanostructures from Stimuli-Responsive Triblock Terpolymers
… (PB-b-PtBMA-b-PDMAEMA, BTD), which feature pH- and temperature-responsive properties. Using polymer-analogous modification reactions, such as ester hydrolysis of PtBMA to poly(methacrylic acid) (PMAA) or quaternization of PDMAEMA to PDMAEMAq, terpolymers with weak or strong polyelectrolyte …