Person: KORKUT, BORA
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KORKUT
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BORA
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Publication Metadata only Di̇ş heki̇mli̇ğinde kullanılan fotoğraf eki̇pmanlari ve kullanım tekni̇kleri̇(Quintessence Publishing Co, Inc., 2022-03-01) KORKUT, BORA; Korkut B.Publication Metadata only Anteri̇or esteti̇kte rezi̇n kompozi̇t restorasyonlar(Quintessence Publishing Co, Inc., 2022-03-01) KORKUT, BORA; Korkut B.Publication Metadata only Polychromatic Reverse Layering Technique (PRLT) for Crown Fracture Restorations(2022-12-17) KORKUT, BORA; BİLGİN GÖÇMEN, GÜLÇİN; YILMAZ ATALI, PINAR; TARÇIN, BİLGE; Korkut B., Bilgin Göçmen G., Yilmaz Atali P., Tarçin B., Yanikoğlu F.Publication Metadata only Composite Plastering Technique (CPT) for Anterior and Posterior Restorations(2023-01-01) KORKUT, BORA; TÜTER BAYRAKTAR, EZGİ; TAĞTEKİN, DİLEK; Korkut B., Tüter Bayraktar E., Tağtekin D.Publication Metadata only The effect of pre-restorative five-to-five clear aligner therapy (CAT) in restorative treatment planning(2023-03-01) KORKUT, BORA; Korkut B., Ünal T., Murat N., Özcan M.Publication Metadata only The assessment of color adjustment potentials for monoshade universal composites(2023-03-01) TÜTER BAYRAKTAR, EZGİ; KORKUT, BORA; Korkut B., Hacıali Ç., Tüter Bayraktar E., Yanikoğlu F.Publication Metadata only Longevity of direct resin composite restorations in maxillary anterior crown fractures: A 4-year clinical evaluation(2022-03-01) KORKUT, BORA; Korkut B., Ozcan M.Objectives To investigate the longevity of direct composites for Class IV restorations and the possible reasons of failure. Methods and Materials The longevity of 168 Class IV restorations in 50 adult patients was evaluated, in terms of modified United States Public Health Service criteria, for 4 years. Restorations were performed using a monochromatic layered microhybrid, resin-based composite (RBC) (Essentia, Universal Shade, GC Corporation, Japan; n=76) and polychromatic layered micro/nanohybrid (MD and LE shades, Essentia, GC Corporation, Japan; n=92) RBCs, by a single operator. Results The majority of the teeth (n=156) remained acceptable at the end of 4 years, and the overall survival (OS) rate was considered as 92.86%. Survival rates for the monochromatic layering technique (MLT) and polychromatic layering technique (PLT) were 90.8% and 94.6%, respectively. Mean survival was 46 months for MLT and 47 months for PLT, indicating no significant difference (p=0.343). Fracture of the restoration was the most common reason for failure (4.2% out of 7.1% of general failures) for both the layering techniques. Conclusions Under the conditions of this mid-term clinical study, MLT and PLT as well as microhybrid and nanohybrid resin composite materials, showed similar clinical durability. In terms of simplicity, monochromatic layering can be preferred for Class IV restorations, when the right indication criteria are met.Publication Metadata only Effect of polymerization on the color of resin composites(2022-09-01) KORKUT, BORA; YILMAZ ATALI, PINAR; TARÇIN, BİLGE; GÖÇMEN, GÖKHAN; KORKUT B., Dokumacigil G., Murat N., YILMAZ ATALI P., TARÇIN B., GÖÇMEN G.©Operative Dentistry, 2022.OBJECTIVES: The initial shade of a resin-based restorative material should be the same as that after polymerization. In this study, the color changes of translucent and opaque composites from nine different brands were assessed after polymerization using a spectrophotometer and cross-polarization (CP) photography. METHODS AND MATERIALS: Thirteen nano-hybrid (Essentia LE, GC Corp; Ceram.x Duo SphereTEC A2E/A2D, Dentsply Sirona; Harmonize A2E/A2D, Kerr Dental; IPS Empress Direct A2E/A2D, Ivoclar Vivadent; Mosaic EN/A2, Ultradent Products; Clearfil Majesty Es-2 A2E/A2D, Kuraray Noritake; Charisma Topaz A2/OL, Kulzer), two supra nano-hybrid (Estelite Asteria NE/A2B; Tokuyama), two nano-filled (Filtek Ultimate A2E/A2D; 3M) light-curing resin composites, and one micro-hybrid (Essentia MD, GC Corp) light-curing resin composite were tested. Disc-shaped specimens (n=5) were prepared using silicone molds (12 × 5 mm) and polymerized from both sides using an LED curing light (Elipar Deepcure S, 3M) at a light intensity of 1470 mW/cm2. Measurements were performed before and 1 day after polymerization using a contact-type dental spectrophotometer (Easy Shade 5, VITA Zahnfabrik, Bad Säckingen, Germany) and a combination of CP photography and Photoshop CC software (Adobe Inc, San Jose, CA, USA). Spectrophotometry and CP photography ΔE* values were calculated; the perceptibility threshold was a ΔE* value of 1.2. VITA spectrophotometry color change scores were also calculated and evaluated. RESULTS: The overall ΔE* values ranged between 0.34 and 12.56. Two-way analysis of variance (ANOVA) showed that color change was associated most strongly with composite brand (p<0.001), followed by shade (p=0.002). Color change (p=0.002) and degree of darkening/lightening (p<0.001) were significantly greater for dentin compared to enamel shades. Clearfil Majesty Es-2 (Kuraray Noritake) showed significant lightening, whereas all other composites showed darkening after polymerization. All composite brands presented perceptible (ΔE*≥1.2) color changes. Estelite Asteria (Tokuyama), Ceram.x Duo SphereTEC (Dentsply Sirona), and Harmonize (Kerr Dental) were considered the most reliable brands regardless of the shade. The spectrophotometry and CP photography methods were positively correlated (p<0.001). Also, CIEDE2000 and CIELCH (also referred to as CIE L*c*h) color systems were positively correlated based on the ΔE* values (p<0.001). CONCLUSIONS: Despite improvements in the chemical composition of, and fillers for, contemporary resin-based composites (RBCs), all tested composite brands showed perceptible color change after polymerization, except for some shades. Under the conditions in this study, it is preferable to polymerize the composite during the trial phase, before identifying the most appropriate shade. CP photography in combination with Photoshop analysis appears to be a reliable and promising approach for color evaluation.