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ÖZDEMİR, ŞERİFE

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2014 - 20193
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Author: Ozalp, Serife × Type: Article ×

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Now showing 1 - 3 of 3
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    SEM-EDX analysis of brushing abrasion of chitosan and propolis based toothpastes on sound and artificial carious primary enamel surfaces
    (2014-09-01) Ozalp, Serife; Tulunoglu, Ozlem; ÖZDEMİR, ŞERİFE
    Purpose. The objective of this study was to assess the brushing abrasion effects of toothpastes containing chitosan and propolis on sound and demineralized primary tooth enamel.
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    Polymerization characteristics of colored compomers cured with different LED units
    (2019-02-01) Durmus, ZEHRA; Yilmaz, BERZA; Bakkal, MELTEM; Durmus, Ali; Ozalp, Serife; BAKKAL, MELTEM; YILMAZ, BERZA; ÖZDEMİR, ŞERİFE
    Aim: Incomplete polymerization of a resin material used for dental restoration affects the properties of the restoration. We evaluated the structural and mechanical properties of three different colored compomers cured with three different LED units to observe the characteristic changes occurring in different matches. Methods: Polytetrafluoroethylene molds (5 mm in diameter and 2 mm in thickness) were used to prepare disk-shaped sample specimens. Nine sample groups (each of five specimens) were prepared, three each of different compomer resin colors (gold, berry, and silver). Samples were cured using three different LED units (Optima, VALO, and Demi Ultra), according to the manufacturers’ instructions. Microstructural properties of samples were characterized by determining the degree of curing using Fourier-transform infrared spectroscopy and by analyzing sample morphology under a scanning electron microscope. The Vickers hardness, compressive strength, and elastic modulus of the samples were measured to investigate their mechanical properties. Results: The degrees of curing decreased in the order of silver > berry > gold for all curing units. Conversely, gold compomers exhibited poorer mechanical values than the berry and silver counterparts. The Optima 10 unit yielded slightly higher degrees of curing than the other devices, followed by Demi Ultra and VALO light-curing units, respectively. Conclusion: The resin color affected the structural and mechanical properties of the compomers, possibly as a result of the complex interactions and relationships between the irradiation light and resin material, such as light absorbance and reflectance; thus, depending on the color as well as the curing protocol.
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    Microhardness and SEM-EDX Analysis of Permanent Enamel Surface Adjacent to Fluoride-releasing Restorative Materials Under Severe Cariogenic Challenges
    (2018-09-01) Ozveren, Neslihan; Ozalp, Serife; ÖZDEMİR, ŞERİFE
    Purpose: In this study, the protective effects of restorative materials with fluoride content, resin-modified glass-ionomer cement (RMGIC), giomer, and glass carbomer against artificial initial caries lesions in a simulated highly cariogenic oral environment were evaluated. Considering the reported recharging abilities of these restorative materials, fluoridated toothpaste was applied to some groups, in which the anti-demineralising effect was also evaluated.