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GÜRDAL, IŞIL

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Kurumdan Ayrılmıştır
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IŞIL
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GÜRDAL
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Now showing 1 - 4 of 4
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    The effect of different distance of curing light and ceramic materials on microhardness of the resin
    (2018-01-01) ATAY, AYŞE; Gürdal, IŞIL; TAŞIN, SİMGE; KARA, ÖZLEM; ÜŞÜMEZ, ASLIHAN; ATAY, AYŞE; GÜRDAL, IŞIL; KARA, ÖZLEM
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    Color Change of Different Dual-Cure Resin Cements After Thermocycling
    (2019-05-01T00:00:00Z) Atay, Ayse; Palazli, Zulal; GÜRDAL, IŞIL; Usumez, Aslihan; ATAY, AYŞE; GÜRDAL, IŞIL
    The purpose of this study is to evaluate the effect of thermocycling on the color change of the amine-free dual-cure resin cements. IPS e. max CAD blocs were cut into specimens of 1 mm thickness (N=28) and cemented with one of the 4 different amine-free dual-cure resin cements (NX3 Nexus [NX], Kerr Dental; Variolink Esthetic DC [VE], Ivoclar Vivadent; Panavia V5 [PV], Kuraray Dental; G-CEM Linkforce [GC], GC Corporation) (n=7). A spectrophotometer was used for color measurements. Specimens were subjected to thermocycling (5 degrees C and 55 degrees C; 5000 and 10000 cycles). Normality of data distribution was tested by using the Kolmogorov-Smirnov test. Statistical analysis was performed using a two-way analysis of variance (ANOVA) and Tukey-s multiple comparison tests at a significance level of p0.05). There were no statistically significant differences between the Delta E0 and Delta E1 values of the GC group, however the other groups were affected after 10000 thermocycling (p>0.05). Amine-free resin cements used for cementation showed color change after thermocycling except GC group. All resin cements were showed clinically acceptable color change after thermocycling (Delta E<3.5).
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    Effects of New Generation All-Ceramic and Provisional Materials on Fibroblast Cells
    (2019-01-01T00:00:00Z) Atay, Ayse; GÜRDAL, IŞIL; BOZOK ÇETİNTAŞ, VİLDAN; Usumez, Aslihan; ÇAL, EBRU; GÜRDAL, IŞIL
    Purpose The purpose of this in vitro study was to evaluate the cytotoxic and apoptotic effects of seven new-generation all-ceramic materials for CAD/CAM (Lava Ultimate [LU], VITA Mark II [VM], InCoris TZI [IC], IPS e.max CAD [EM], VITA Suprinity [VS], Cerasmart [CS], IPS Empress CAD [EC]) and six provisional materials (Protemp 4 [PT], Telio CAD [TC], CAD-Temp [CT], Telio Lab [TL], Temdent Classic [TD], Telio CS C&B [TS]) on L929 mouse fibroblast cells. Materials and Methods 24 disc-shaped specimens ( null = 5 mm, h = 2 mm) were prepared from each test material. Medium extracts were collected at the 1st, 3rd, and 7th days for each group and tested using the L929 cell line. Cytotoxicity was evaluated using XTT assay, and apoptosis was determined by Annexin-V/PI staining. Data were analyzed using one-way ANOVA, Tukey-s multiple comparison tests at a significance level of p < 0.05. Results The cell viability results among all-ceramic material groups after the 1st and 7th days of incubation periods showed statistically significant differences (p < 0.05). There were significant differences within the ceramic groups in different incubation periods regarding apoptosis rate (p < 0.05). Throughout the entire test period, LU and VM from the CAD/CAM all-ceramic materials and PT and TC from the provisional restoration materials showed cell viability higher than 90%. EC and TD showed the lowest cell viability and highest apoptosis rates in their own groups. For the provisional materials, there were significant differences in cell viability and apoptosis rate in all the incubation periods for each material (p < 0.05). Conclusions Although some new-generation CAD/CAM and provisional restoration materials display slight cytotoxicity values, the results are still within the reliable range, and they can safely be used in clinical conditions.
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    Color change of CAD-CAM materials and composite resin cements after thermocycling
    (2018-10-01T00:00:00Z) GÜRDAL, IŞIL; Atay, Ayse; Eichberger, Marlis; ÇAL, EBRU; Usumez, Aslihan; Stawarczyk, Bogna; GÜRDAL, IŞIL
    Statement of problem. The color of resin cements and computer-aided-design and computeraided-manufacturing (CAD-CAM) restorations may change with aging.