Person: ÖZYILMAZ, ÖZGÜN YUSUF
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Publication Open Access Effect of cleansers on denture base resins- structural properties(2019-02-01) Ozyilmaz, Ozgun Yusuf; Akin, Ceyda; ÖZYILMAZ, ÖZGÜN YUSUFIntroduction: We assessed the effect of different available denture cleansers on the roughness and hardness of polyetherketoneketone, thermoinjection-molded polyamide, and polymethylmethacrylate. Materials and Methods: A total of 150 disc-shaped specimens were fabricated (10 mm × 2 mm) from these three denture base resins, and divided into five subgroups (n = 10) according to immersion procedures. One of these groups subjected to distilled water served as control, whereas other groups were subjected to daily cleansing with four denture cleansers (Corega, Protefix, Curaprox, and Perlodent) for 8 h a day for 140 days. The surface roughness and hardness values of specimens were recorded by measuring twice at baseline, and again after application of chemical solutions. Topography alterations after treatments were assessed with scanning electron microscopy. The data were subjected to statistical analysis and comparison among groups was done using Kruskal Wallis and Wilcoxon Signed Ranks tests. P-value <0.05 was considered significant. Results: The surface roughness of polyetherketoneketone, polymethylmethacrylate, and polyamide dentures was increased significantly by chemical solutions of denture cleansers. While the hardness value of polyetherketoneketone was not affected significantly after immersion in denture cleansers, those of polymethylmethacrylate and polyamide decreased significantly. Compared with Curaprox, the effervescent tablets significantly altered the surface hardness and roughness of polyamide. Conclusion: Denture cleansers can considerably alter the surface roughness and hardness of denture base resins and should be used carefully depending on the material.Publication Metadata only Effect of two activated bleaching techniques on surface roughness of different esthetic restorative materials(2017-01-01T00:00:00Z) ALPTEKİN, Tuncay; Özyilmaz, ÖZGÜN YUSUF; Aykent, Filiz; Kara, Haluk Bariş; ÖZYILMAZ, ÖZGÜN YUSUFPublication Metadata only Termal ve mekanik yükleme siklusunun self–etch rezin yapıştırma simanının dentine bağlanma dayanımı üzerine etkisi(2017-07-01) KARA, ÖZLEM; SARI, TUĞRUL; ÖZYILMAZ, ÖZGÜN YUSUF; İNAN KURUGÖL, PELİN; KARA, HALUK BARIŞ; KARA, ÖZLEM; ÖZYILMAZ, ÖZGÜN YUSUFPublication Metadata only Temperature rises during tooth bleaching with different light-curing units(2015-08-03T00:00:00Z) Ozyilmaz, Ozgun Yusuf; Yavuz, Tevfik; SARI, Tugrul; Aykent, Filiz; Ozturk, Atiye Nilgun; ÖZYILMAZ, ÖZGÜN YUSUFThe aim of this study was to evaluate the influence of three different light-curing units on the temperature rise induced in the pulpal cavity, when bleached with 35% hydrogen peroxide (HP). Forty extracted maxillary central incisors were randomly divided into four groups according to photoactivation procedure (n=10). Whiteness HP (WHP) bleaching agent which contains 35% HP bleach was placed on the facial tooth surface and no photoactivation device was used (control); an blue light-emitting diode (LED, 40s), a diode laser (4W, Continous mode, 20s), and Nd:YAG laser (4W, 60Hz frequency, 20s). Temperature rise in the pulpal chamber was measured with a J-type thermocouple wire that was connected to a data logger before and immediately after each 20-40s application. One tooth of each group was selected for scanning electron microscope analysis. Data were analyzed using one-way ANOVA followed by the Games Howell post hoc test at a preset alpha of 0.05. One-way ANOVA revealed that there was a significant difference among the light-curing units (p<0.05) and between control group and light-curing units (p<0.05). The Nd:YAG induced significantly, which resulted in higher temperature increase than other light-curing units (10.7 degrees C). The LED unit produced the lowest temperature changes (3.2 degrees C) among the light-curing units. The presence of the bleaching gel did not cause a temperature increase in control group (0 degrees C). The results suggested that using light-curing units caused temperature changes in the intrapulpal cavity during tooth bleaching. The use of LED will be more safer for pulpal health when assisted with WHP bleaching gel.Publication Metadata only Temperature Rises During Tooth Bleaching with Different Light Curing Units(2012-05-03T00:00:00Z) Özyılmaz, Özgün Yusuf; Yavuz, Tevfik; Sarı, Tuğrul; Aykent, Filiz; Öztürk, Atiye Nilgün; ÖZYILMAZ, ÖZGÜN YUSUFPublication Metadata only Bond strength of resin composite to light activated bleached enamel(2016-11-01T00:00:00Z) Yavuz, T.; Ozyilmaz, O. Y.; Ozturk, A. N.; Aykent, F.; ÖZYILMAZ, ÖZGÜN YUSUFObjectives: This study evaluated the microtensile bond strength (mu TBS) of a resin composite bonded to bleached enamel as a function of bleaching conditions.Publication Metadata only Effects of repeating bleaching procedure on color stability various porcelains(2019-09-08T00:00:00Z) SAYIN ÖZEL, GÜLSÜM; TAHA, MUHAMMED ESAD; ÖZYILMAZ, ÖZGÜN YUSUF; ERDEM, KÜBRA; ERDEM, KÜBRA; ÖZYILMAZ, ÖZGÜN YUSUFPublication Metadata only Effect of Different Cleansers on Mechanical Properties of New Generation Composites.(2018-09-15) SAYIN ÖZEL, GÜLSÜM; ERDEM, KÜBRA; ÖZYILMAZ, ÖZGÜN YUSUF; ÖZYILMAZ, ÖZGÜN YUSUF; ERDEM, KÜBRAPublication Metadata only The Effect of Glazing Procedures on Color Stability of Seven Different Ceramics.(2018-07-28T00:00:00Z) ÖZYILMAZ, ÖZGÜN YUSUF; SAYIN ÖZEL, GÜLSÜM; OĞUZ AHMET, BEBEK SERRA; ÖZYILMAZ, ÖZGÜN YUSUFPublication Metadata only Evaluation the Effect of Various Surface Pretreatment on Shear Bond Strength Between Polyetherketonekethone (PEKK) and Resin Cement.(2018-12-02) SAYIN ÖZEL, GÜLSÜM; ÖZYILMAZ, ÖZGÜN YUSUF; ÜNLÜ, NİMET; VELİOĞLU, MEHMET SEMİH; AKIN, CEYDA; ÇELEBİ, HAKKI; ÖZYILMAZ, ÖZGÜN YUSUF