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DÖNMEZ, NAZMİYE

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NAZMİYE
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DÖNMEZ
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Now showing 1 - 10 of 13
  • PublicationOpen Access
    Effect of polymerization time and home bleaching agent on the microhardness and surface roughness of bulk-fill composites: A scanning electron microscopy study
    (2019-01-01T00:00:00Z) ÖZDUMAN, ZÜMRÜT CEREN; Kazak, Magrur; FİLDİŞİ, MEHMET ALİ; ÖZLEN, RÜMEYSA HATİCE; DALKILIÇ, Evrim; DÖNMEZ, NAZMİYE; ÖZDUMAN, ZÜMRÜT CEREN; FİLDİŞİ, MEHMET ALİ; ÖZLEN, RÜMEYSA HATİCE; DALKILIÇ, EVRIM; DÖNMEZ, NAZMİYE
    Objective: The aim of this study is to evaluate the microhardness and surface roughness of two different bulk-fill composites polymerized with light-curing unit (LCU) with different polymerization times before and after the application of a home bleaching agent. Materials-methods: For both microhardness and surface roughness tests, 6 groups were prepared with bulk-fill materials (SonicFill, Filtek Bulk Fill) according to different polymerization times (10, 20, and 30 s). 102 specimens were prepared using Teflon molds (4 mm depth and 5 mm diameter) and polymerized with LCU. 30 specimens (n = 5) were assessed for microhardness. Before home bleaching agent application, the bottom/top (B/T) microhardness ratio was evaluated. After bleaching agent application, the microhardness measurements were performed on top surfaces. Roughness measurements were performed in 72 specimens (n = 12) before and after bleaching application. Additionally, for SEM analyses, two specimens from all tested groups were prepared before and after bleaching agent application. The data B/T microhardness ratio before bleaching was analyzed by two-way ANOVA and Tukey's HSD test. The data from the top surface of specimens' microhardness before and after bleaching were analyzed using Wilcoxon signed-rank test, Kruskal-Wallis, Mann-Whitney U tests. The data from surface roughness tests were statistically analyzed by multivariate analysis of variance and Bonferroni test (p < 0.05). Results: The B/T microhardness ratio results revealed no significant differences between groups (p > 0.05). Comparing the microhardness values of the composites' top surfaces before and after bleaching, a significant decrease was observed exclusively in FB30s (p < 0.05). No significant differences in surface roughness values were observed when the groups were compared based on bulk-fill materials (p > 0.05) while the polymerization time affected the surface roughness of the SF20s and SF30s groups (p < 0.05). After bleaching, surface roughness values were significantly increased in the SF20s and SF30s groups (p < 0.05). Conclusion: The clinicians should adhere to the polymerization time recommended by the manufacturer to ensure the durability of the composite material in the oral environment.
  • PublicationMetadata only
    The effect of home bleaching agent and polymerization time on surface roughness.
    (2019-08-29T00:00:00Z) FİLDİŞİ, MEHMET ALİ; ÖZLEN, RÜMEYSA HATİCE; Özduman, Zümrüt Ceren; DALKILIÇ, EVRİM; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE; FİLDİŞİ, MEHMET ALİ; ÖZLEN, RÜMEYSA HATİCE; DALKILIÇ, EVRIM; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    İlave Fiber Uygulaması Düşük Viskoziteli Bulk Fil Rezin ile Restore Edilmiş Endodontik Tedavi Görmüş Dişlerin Kırılma Dayanımını Etkiler Mi
    (2018-11-30T00:00:00Z) DALKILIÇ, EVRİM; FİLDİŞİ, MEHMET ALİ; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE; DENİZ ARISU, HACER; HİSARBEYLİ, DUYGU; FİLDİŞİ, MEHMET ALİ; DALKILIÇ, EVRIM; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    Premolar cuspal deflection with dual-cure composites using different power-irradiances.
    (2018-08-28T00:00:00Z) KAZAK, MAĞRUR; Oğlakçı, Burcu; DÖNMEZ, NAZMİYE; DALKILIÇ, EVRİM; KARAHAN, SEVİLAY; DÖNMEZ, NAZMİYE; DALKILIÇ, EVRIM
  • PublicationMetadata only
    Bulk Fill Kompozitlerin Tamirinde Farklı Yüzey Pürüzlendirme İşlemlerinin Makaslama Bağlanma Dayanımı Üzerine Etkisi.
    (2019-09-04T00:00:00Z) Hisarbeyli, Duygu; ÖZLEN, RÜMEYSA HATİCE; DALKILIÇ, EVRİM; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE; ÖZLEN, RÜMEYSA HATİCE; DALKILIÇ, EVRIM; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    Effect of different LED light curing units on the microhardness values of different bulk fill composites
    (2017-12-03T00:00:00Z) FİLDİŞİ, MEHMET ALİ; DALKILIÇ, EVRİM; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE; FİLDİŞİ, MEHMET ALİ; DALKILIÇ, EVRIM; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    İlave Fiber Uygulaması Düşük Visköziteli Bulk-Fill Kompozit ile Restore Edilmiş Endodontik Tedavi Görmüş Dişlerin Kırılma Dayanımını Etkiler mi?
    (2018-11-30T00:00:00Z) Hisarbeyli, Duygu; FİLDİŞİ, MEHMET ALİ; DALKILIÇ, EVRİM; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE; DENİZ ARISU, HACER; FİLDİŞİ, MEHMET ALİ; DALKILIÇ, EVRIM; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    Evaluation of Monomer Release of Bulk Fill Composite Resins with Extended Light Curing
    (2022-04-22T00:00:00Z) Tırıs, Gizem; Dönmez, Nazmiye; Dalkılıç, Evrim; ÖZDUMAN, ZÜMRÜT CEREN; TIRIS, GİZEM; TEKKELİ, ŞERİFE EVRİM; DÖNMEZ, NAZMİYE; DALKILIÇ, EVRIM
  • PublicationOpen Access
    Can Fiber Application Affect the Fracture Strength of Endodontically Treated Teeth Restored with a Low Viscosity Bulk-Fill Composite?
    (2019-01-01) Dalkilic, Evrim Eliguzeloglu; Kazak, MAĞRUR; Hisarbeyli, DUYGU; Fildisi, MEHMET ALİ; Donmez, NAZMİYE; Arisu, Hacer Deniz; DALKILIÇ, EVRIM; KAZAK, MAĞRUR; HİSARBEYLİ, DUYGU; FİLDİŞİ, MEHMET ALİ; DÖNMEZ, NAZMİYE
    Objective: The aim of this study is to evaluate the effects of different fiber insertion techniques and thermomechanical aging on the fracture resistance of endodontically treated mandibular premolar teeth restored using bulk-fill composites. Materials and methods: Eighty human mandibular premolar teeth were randomly divided into eight groups: Group IN, Group BF, Group PRF1, Group PRF2, Group IN-TMA, Group BF-TMA, Group PRF1-TMA ,and Group PRF2-TMA. Group IN (intact) and Group IN-TMA (intact but subjected to thermomechanical aging) served as control groups. In the other six groups, endodontic treatment was performed and standardized mesio-occluso-distal (MOD) cavities were prepared. In BF, PRF1, and PRF2, the cavities were restored with bulk-fill composite only, bulk-fill/Ribbond, and bulk-fill/additional Ribbond, respectively. In BF-TMA, PRF1-TMA, and PRF2-TMA, the teeth were subjected to thermomechanical aging after the restorations. All of the teeth were fractured on the universal testing machine. Fracture surfaces were analyzed with a stereomicroscope. Results: Control groups showed significantly higher fracture strengths than tested groups (P<0.05). No statistically significant difference was observed among the tested groups (P>0.05). Most of the favorable fractures were seen in PRF1, PRF2, and PRF2-TMA. Most of the unfavorable fractures were seen in BF-TMA. Conclusions: Although fiber insertion with different techniques did not increase the fracture strength of teeth restored with bulk-fill composites, it increased the favorable fracture modes. Thermomechanical aging did not change the fracture strength of the groups.
  • PublicationMetadata only
    Microhardness and water solubility of expired and non-expired shelf-life composites
    (2018-07-01) DÖNMEZ, NAZMİYE; DALKILIÇ, EVRİM; DALKILIÇ, EVRIM; DÖNMEZ, NAZMİYE