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Now showing 1 - 10 of 36
  • PublicationMetadata only
    The color change of a novel single-shade composite immersed in different beverages.
    (2022-12-01) Fazlıoğlu L.; Oğlakçı B.; Özduman Z. C.; Dalkılıç E.; FAZLIOĞLU, LEYLA; OĞLAKÇI, BURCU; ÖZDUMAN, ZÜMRÜT CEREN; DALKILIÇ, EVRIM
  • PublicationMetadata only
    Surface Roughness of Nanoceramic Composite and Giomer with Different Finishing and Polishing Systems
    (2022-04-22T00:00:00Z) Öztürk Yeşilırmak, Sevda; Özduman, Zümrüt Ceren; Dalkılıç, Evrim; OĞLAKÇI, BURCU; ÖZDUMAN, ZÜMRÜT CEREN; DALKILIÇ, EVRIM
  • PublicationMetadata only
    Repair Bond Strength of Hybrid CAD/CAM Materials After Silane Heat Treatment with Laser
    (2022-05-28T00:00:00Z) Değer, Ceren; Oğlakçı, Burcu; Özduman, Zümrüt Ceren; Dalkılıç, Evrim; DEĞER, CEREN; OĞLAKÇI, BURCU; ÖZDUMAN, ZÜMRÜT CEREN; DALKILIÇ, EVRIM
  • PublicationMetadata only
    Effects of Experimental Nanohydroxyapatite and Er:YAG Laser on Dentin Hypersensitivity
    (2022-09-15T00:00:00Z) Şahin, Demet; Değer, Ceren; Oğlakçı, Burcu; Demirkol, Metehan; Küçükyıldırım, Bedri Onur; Gürsel, Mehtikar; Dalkılıç, Evrim; ŞAHİN, DEMET; DEĞER, CEREN; OĞLAKÇI, BURCU; GÜRSEL, MEHTİKAR; DALKILIÇ, EVRIM
  • PublicationMetadata only
    Shear Bond Strength of Indirect Pulp Capping Materials to Caries-Affected Dentin
    (2021-04-22T00:00:00Z) Özduman, Zümrüt Ceren; Oğlakçı, Burcu; Dalkılıç, Evrim; ÖZDUMAN, ZÜMRÜT CEREN; OĞLAKÇI, BURCU; DALKILIÇ, EVRIM
    Aim: To evaluate the shear bond strength (SBS) of indirect pulp capping materials to cariesaffected dentin (CAD) with/without chlorhexidine (CHX) pretreatment.Materials and Methods: Coronal dentin surfaces of 150 extracted sound human molar teeth wereground flat. Artificial CAD were obtained. Half of the specimens were pretreated with 2%CHX andhalf of them received no-pretreatment before the application of indirect pulp capping materials(n=15). Five materials were assessed: 1-Conventional glass ionomer cement (Fuji IX, GC, Japan)(CGIC) 2-Resin modified glass ionomer cement (Fuji II GC, Japan) (RMGIC), 3-Resin modified glassionomer bioactive cement (Activa Bioactive, Pulpdent, USA) (ACT) 4-Resin modified tricalciumsilicate (Theracal, Bisco, USA) (RMCS), 5-Water-based tricalcium silicate, (Biodentine, Septodont,France) (WBCS). To evaluate the SBS, the Universal Test machine was used (1mm/min).Data were evaluated by Student’s t-test and one-way ANOVA. The differences betweengroups were analyzed by Mann-Whitney U and Kruskal-Wallis test. Pairwise comparisons weredetermined with the post-hoc Tukey HSD or Dunn-Bonferroni test. Unless otherwise stated,results for p<0.05 were considered statistically significant. Bonferroni Correction was made tocontrol Type I error in multiple comparisons.Results: Among the groups without pretreatment; SBS of RMCS [0.72(0.59-1.09) MPa] and WBCS[0.89 (0.31-1.05) MPa] were found to be significantly lower compared to ACT [4.37(3.34-6.45) MPa],CGIC [2.52(1.88-6.36) MPa] and RMGIC [5.24(3.23-8.27) MPa] (p<0.01). There were no significantdifferences between Group ACT, CGIC and RMGIC and between Group RMCS and WBCS(p>0.05).Among the CHX pretreated samples, SBS of Group RMCS [0.43(0.14-0.86) MPa] and WBCS[0.21(0.16-0.35) MPa] were found to be significantly lower than Group ACT [4.33(2.68-7.06) MPa],CGIC [4.36(3.61-7.44) MPa] and RMGIC [7.56(6.38-10.29) MPa] (p<0.01). There were no significantdifferences between Group ACT, CGIC and RMGIC and between Group RMCS and WBCS (p>0.05).There was no statistically significant difference between the groups with and without CHXpretreatment in all materials (p>0.010) except for WBCS. CHX pretreated WBCS group showedlower SBS than the WBCS/without CHX (p=0.007).Conclusion: Tricalcium silicate-based materials had lower shear bond strength than glassionomer-based materials, both with and without pre-treatment of CHX.*This study was funded by Scientific and Technological Research Council of Turkey (TUBITAK)(ProjectNo:119S048)Keywords: indirect pulp capping material, shear bond strength, caries affected dentin
  • PublicationMetadata only
  • PublicationMetadata only
    Volumetric change and gap formation in class V composite restorations: a micro-CT analysis
    (2020-07-01T00:00:00Z) OĞLAKÇI, Burcu; Halacoglu, Derya Merve; ÖZDUMAN, ZÜMRÜT CEREN; Dalkilic, Evrim; OĞLAKÇI, BURCU; ÖZDUMAN, ZÜMRÜT CEREN; DALKILIÇ, EVRIM
    Thisin vitrostudy evaluated the volumetric change (VC) and gap formation (GF) in Class V composite restorations after light-curing and aging. Thirty-six extracted human premolars were used. Standardized Class V cavities (3 mmx3 mmx1.5 mm) were prepared. G-Premio Bond was applied. The teeth were randomly assigned into six groups (n = 6): Group FZ: Filtek Z250(microhybrid), Group SP: SDR Plus Bulk Fill Flowable (low-viscosity bulk-fill), Group EB: Estelite Bulk Fill Flow (low-viscosity bulk-fill), Group GI: G-aenial Universal Injectable (highly-filled low-viscosity), Group AF: Admira Fusion (ormocer), Group SX: Solare X (nanohybrid). Each specimen was scanned four times with micro-CT (SkyScan 1174v2, Belgium): after cavity preparation, before and after light-curing, and after aging. The VC (%) and GF (mm(3)) parameters were quantified and analysed. Then, VC after light-curing was verified with AcuVol video image analyser (n = 6). The specimens were submitted to 10,000 thermocycles (5-55 degrees C) and 100,000 load cycles (50N). The data were statistically analysed using the Kruskal-Wallis, Wilcoxon and Dunn tests (p < 0.05). After light-curing, Group AF and FZ showed significantly lower VC than Group GI. Group GI showed significantly higher total GF than Group AF, EB, FZ and SX. Group GI showed significantly higher GF than Group AF, EB and FZ in cervical region. After aging, a significant increase in the volume of the gap (VG) in cervical region was found for Group FZ and GI (p < 0.05). After light-curing, ormocer and microhybrid composites exhibited lower VC and GF than highly-filled low-viscosity composites. After aging, an increase in VG was observed for microhybrid and highly-filled low-viscosity composites for cervical region.
  • PublicationMetadata only
    Çalışma adı: Farklı Bitim ve Polisaj Sistemlerinin Alkasitin Yüzey Pürüzlülüğüne Etkisi
    (2022-10-01T00:00:00Z) Fidan, Reyhan; Sagun, Ayşe Alanur; Oğlakçı, Burcu; Özduman, Zümrüt Ceren; Dalkılıç, Evrim; FİDAN, REYHAN; OĞLAKÇI, BURCU; ÖZDUMAN, ZÜMRÜT CEREN; DALKILIÇ, EVRIM
  • PublicationMetadata only
    The Effect of Curing Modes and Times of Third-Generation Led LCU on the Mechanical Properties of Nanocomposites
    This study evaluates the effect of curing modes and times on the mechanical properties of nanocomposites. Two nanocomposite resins were investigated: supra-nanohybrid (Estelite Posterior Quick; EP) and nanohybrid (Solare X; SX). They were polymerized with a light-emitting diode light-curing units (LED LCU, Valo) as follows: standard mode for 20s (ST20), high power mode for 12s (HP12), high power mode for 20s (HP20), extra power mode for 6s (XP6), and extra power mode for 20s (XP20). For Vickers microhardness (HV), disc-shaped specimens were fabricated (n=10). For the three-point bending test, bar-shaped specimens were fabricated (n=10). Flexural strength and resilience modulus were calculated. The fractured surfaces and specimen surfaces of composites were observed using scanning electron microscopy. The data were analyzed with repeated measures ANOVA, two-way variance, and Bonferroni tests (p<0.05). On the top and bottom surfaces of the EP nanocomposite resin, ST20 and HP12 revealed statistically higher HV than with XP6. Moreover, HP20 and XP20 had statistically higher HV than HP12 and XP6. For the SX nanocomposite resin, HP20 had statistically higher HV than HP12. For EP and SX, there were no significant differences in flexural strength and resilience modulus regarding the curing modes and times. Furthermore, SX demonstrated lower mechanical properties than EP. Scanning electron microscopy indicated that both nanocomposites had similar surface appearances. However, with all curing modes and times, SX exhibited layered fractures and more crack formations than EP. Different curing modes and times could influence the microhardness of nanocomposites.
  • PublicationMetadata only
    premolar cuspal deflection restored with dual-cure composites using different power-irradiances
    (2018-09-07T00:00:00Z) Oğlakçı, Burcu; Dalkılıç, Evrim; OĞLAKÇI, BURCU; DALKILIÇ, EVRIM