Yazar "Tugce Gurcan, Aliye" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ N/A ]
    Öğe
    Comparison of Elasticity Modulus and Nanohardness of Various Dental Restorative Materials
    (Mashhad University of Medical Sciences, 2021) Ozan, Gunce; Mert Eren, Meltem; Yıldırım Bılmez, Zuhal; Tugce Gurcan, Aliye; Yucel Yucel, Yasemin
    Introduction: Restorative materials are under constant loadings from mastication hence, it is important to have the knowledge of structural properties of the restorative materials to have long-term success on restorations. Therefore, the aim is to compare the nanohardness and elastic modulus values of various restorative materials. Methods: Disc-shaped samples were prepared from a high viscosity glass ionomer-Equia Forte Fil (EFF), a compomer-Dyract (DXP), a hybrid ionomer-Geristore (GS), a giomer bulk-fill-Beautifil-Bulk (BB), two bulk-fill composites-Venus Bulk-fill (VB) and Sonic Fill 2 (SF), and a nanohybrid composite-Z250. Samples of each of the tested materials (n=9) were examined under nanoindentation to evaluate elasticity modulus (Er) and nanohardness (Hnano) scores. One of the samples had undergone through scanning electron microscopy (SEM) evaluation. Data were analyzed statistically using the Kruskal-Wallis test. Results: SF had the highest elasticity modulus, followed by Z250 and DXP, without any statistical differences. However, GS had the lowest elasticity modulus, followed by EFF (P<0.001). Among nanohardness scores, there is no significant difference between VB, EFF, DXP, Z250, and BB groups. While SF showed the highest, GS had the lowest nanohardness scores. SEM images showed the differences between filler sizes and shapes. Conclusion: Main structural differences between glass ionomer-based and resin-based materials determined significant differences among related parameters of the restorative materials. © 2021, Mashhad University of Medical Sciences. All rights reserved.
  • Küçük Resim
    Öğe
    Mechanical properties and repair bond strength of polymer-based CAD/CAM restorative materials
    (Wiley, 2021) Sismanoglu, Soner; Tugce Gurcan, Aliye; Yildirim-Bilmez, Zuhal; Gumustas, Burak
    Information on the mechanical properties and repairability of computer-aided design/computer-aided manufacturing (CAD/CAM) blocks is scarce. Five CAD/CAM blocks with similar indications were evaluated, including four resin nanoceramics, one polymer-infiltrated ceramic network (PICN), and one feldspathic ceramic. CAD/CAM blocks were sectioned into 4 mm x 1.2 mm x 13 mm bars for flexural strength (FS), and 4 mm thick blocks were prepared for elastic modulus (EM), nanohardness (NH), and microshear bond strength (mu SBS) testing. FS of the CAD/CAM blocks was determined using a three-point bending test, whereas EM and NH values were measured using a nanoindenter. The reparability of the tested block materials was determined by the mu SBS test. One-way ANOVA was conducted for FS, EM, NH, and mu SBS followed by Tukey's pairwise comparison (alpha < 0.05). FS ranged from 115 to 207 MPa, EM from 8.21 to 44 GPa, NH from 0.76 to 7.24, and mu SBS from 24.9 to 30.6 MPa. The findings of the present study revealed that resin nanoceramic blocks exhibited higher FS values than PICN and feldspathic ceramic, and they have acceptable mechanical properties for the fabrication of single-unit restorations according to the ISO 6872:2008. Furthermore, all CAD/CAM blocks tested can be successfully repaired regarding their recommended repair protocol.