Person: KAHRAMANOĞLU, ERKUT
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KAHRAMANOĞLU
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ERKUT
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Publication Open Access Bruksizm ve İmplant Başarısı: Literatür Derleme(2016-12-09) KAHRAMANOĞLU, ERKUT; Yildiz Domani̇Ç, Kübra; Kahramanoğlu, Erkut; Kulak Özkan, YaseminPublication Open Access Microleakage and Marginal Integrity of Ormocer/Methacrylate-Based Bulk-Fill Resin Restorations in MOD Cavities: SEM and Stereomicroscopic Evaluation(2023-03-01) ŞENOL, AYŞE ASLI; TARÇIN, BİLGE; KAHRAMANOĞLU, ERKUT; YILMAZ ATALI, PINAR; Şenol A. A., Karabulut Gencer B., Tarçın B., Kahramanoğlu E., Yılmaz Atalı P.This in vitro study aimed to compare the microleakage and marginal integrity of methacrylate/ormocer-based bulk-fill composite (BFC) restorations used in cervical marginal relocation with two different layering thicknesses in mesio-occlusal-distal (MOD) cavities exposed to thermomechanical loading. Standard MOD cavities were prepared in 60 mandibular molars and assigned into three groups: x-tra fil/AF + x-tra base/XB, Tetric N-Ceram Bulk Fill/TNB + Tetric N-Flow Bulk Fill/TFB, and Admira Fusion x-tra/AFX + Admira Fusion x-base/AFB. Each group was further divided into two subgroups (2 mm and 4 mm) based on the thickness of flowable BFCs (n = 10). The specimens were subjected to thermo-mechanical loading (240,000 cycles) and immersed in 0.2% methylene blue. Following mesiodistal sectioning, the specimens were examined under stereomicroscope (×25) and scored (0–3) for microleakage. Marginal integrity was examined using a scanning electron microscope (SEM). Descriptive statistical methods and the chi-square test were used to evaluate the data (p < 0.05). While there was no statistically significant difference in gingival cement microleakage in the XB and AFB specimens with a 4 mm thickness, microleakage was significantly increased in the TFB specimen (p = 0.604, 0.481, 0.018 respectively). A significantly higher amount of score 0 coronal microleakage was detected in the AFX2 mm + AFB4 mm compared to the TNB2 mm + TFB4 mm (p = 0.039). The SEM examination demonstrated better marginal integrity in groups with 2 mm thick flowable BFCs. Ormocer and methacrylate-based materials can be used in marginal relocation with thin layers. Keywords: bulk-fill composite; layering thicknesses; marginal relocation; microleakage; ormocerPublication Metadata only The Effect of Different Restorative and Abutment Materials on Marginal and Internal Adaptation of Three-Unit Cantilever Implant-Supported Fixed Partial Dentures: An In Vitro Study(WILEY-BLACKWELL, 2013) KAHRAMANOĞLU, ERKUT; Kahramanoglu, Erkut; Kulak-Ozkan, YaseminPurposePassive fit is generally assumed to be a significant prerequisite for long-term implant success. The aim of this study was to evaluate the precision fit of three-unit implant-supported fixed partial dentures with different restorative and abutment materials on two implant systems: the Straumann and Astra Tech. Materials and MethodsTwo mandibular epoxy resin models (one for each implant system) were fabricated, and two implants were inserted at the first and second molar region. Poly(vinyl siloxane) impression material was used to make the dental impression. For each implant system, fifteen models were fabricated, and each group was divided into three subgroups (group 1: titanium abutment with metal framework, group 2: titanium abutment with zirconium framework, group 3: zirconium abutment with zirconium framework). The replica technique was used to examine the marginal and internal gap values. For each restoration, 20 measurements were performed, totaling 1200 measurements for all groups. Data were evaluated statistically using ANOVA and LSD post hoc test (p < 0.05). ResultsThe highest values at internal adaptation measurements were found at the occlusal surface for all groups. When the mean values of the marginal measurements were assessed, the lowest measurements were found in group 3 (51.416m), and the highest values were found in group 1 (79.394m). There were statistically significant differences between subgroups for marginal measurements (p < 0.05). ConclusionsAs included in our study, marginal measurement values were found to be 46 to 87m. The marginal discrepancy of the tested materials could be considered clinically acceptable.Publication Open Access Fracture Resistance of Lithium Disilicate, Indirect Resin Composite and Zirconia By Using Dual Cure Resin Cements(MARMARA UNIV, INST HEALTH SCIENCES, 2020-10-01) KAHRAMANOĞLU, ERKUT; Badwan, Mohammed; Kahramanoglu, ErkutObjective: The aim of the study was to examine the fracture resistance of lithium disilicate, indirect resin composite and zirconia by using dual cure resin cements. Methods: Three groups of 180 samples (n= 60) of E-max, zirconia and indirect resin composite materials (10mm diameter and 1 mm thickness). Discs were fabricated and cemented with three dual curing resin cements. Aging treatment was then applied to the discs by using thermal cycle machine (at 5 degrees C to 55 degrees C/dwell time: 20s), 10000 cycles for 168 hours' 7 days. Fracture tests were performed to the sample discs using piston on three balls test to determine the biaxial flexure strength of the 180 discs of the three materials. The results were analysed by using one-way analysis of variance (ANOVA) and t-test. Results: Statistically significant difference was found between control groups (before cementation and thermal cycle) and both group B (after cementation before thermal cycle) and group C (after cementation and thermal cycle) in all materials (P<0.05). Comparing Zirconia, Gradia and E-max all control groups showed statistically significant difference and Zirconia was showed greater flexural resistance against other materials. In addition, all materials also showed statistically significant difference in Variolink/Multilink cemented Group B and C. In Nexus cemented Group B and C statistically significant difference was found only Zirconia material. Similar to control group results, Zirconia material was showed greater flexural resistance values with both cements in Group B and C. Conclusion: There is a difference between flexural strength of the three materials, Zirconia has a better flexural strength when compared to lithium disilicate and indirect resin composite.Publication Metadata only Degree of Conversion of Luting Materials Under CAD/CAM Blocks(2023-07-03) DOĞU KAYA, BENGÜ; YILMAZ ATALI, PINAR; ŞENOL, AYŞE ASLI; TARÇIN, BİLGE; KAHRAMANOĞLU, ERKUT; DOĞU KAYA B., Öztürk S., YILMAZ ATALI P., ŞENOL A. A., TARÇIN B., KAHRAMANOĞLU E.Introduction: The aim of this in vitro study was to evaluate the degree of conversion of dual-cured luting cement (Bifix QM, Voco) and flowable composite (GrandioFlow, Voco) under lithium disilicate glass-ceramic (Emax, Ivoclar Vivadent) and hybrid (Grandio Blocs, Voco) CAD/CAM blocks with different thicknesses. Material and Methods: Disc-shaped CAD/CAM blocks with a diameter of 8 mm and two different thicknesses of 1.5 and 2 mm were used in this study. Bifix QM and GrandioFlow (n=3, per material) were polymerized through 1.5- and 2-mm thick CAD/CAM materials. Twenty-four samples with standard thicknesses were achieved by placing 2 adhesive tapes (3M) between the glass plate and mylar strip was used in this set up. The luting cement and flowable composite were polymerized from the upper surface of the blocks using a LED-curing unit (1000 mw/cm2 , Valo Cordless, Ultradent) by closing the periphery. Samples were stored in distilled water at 37°C for 24 hours. Luting materials (100 µm thickness) were examined by Fourier Transform Infrared Spectroscopy (Spectrum Two FT-IR Spectrometer, PerkinElmer) analysis and the degree of conversion (DC) were calculated. Data were analyzed with SPSS V23, One-way Anova and Kruskal Wallis tests with the significance level p<0.05. Results: No significant difference was found in DC between Bifix QM (34.68 ± 13.21; 24.94 ± 1.93) and GrandioFlow (41.33 ± 2.28; 38.07 ± 4.57) when using 1.5 mm Emax (p=0.476) and GrandioSo (p=0.050), respectively. DC of GrandioFlow (37.94 ± 5.33) was significantly higher than Bifix QM (23.36 ± 2.03) with Emax-2 mm (p=0.011). DC of Bifix QM was found to be similar under 1.5 mm (p=0.306) or 2 mm (p=0.051) thicknesses of both Emax and GrandioSo. The difference in DC values of GrandioFlow did not show statistically significance for 1.5 mm and 2 mm thicknesses under GrandioSo and Emax (p=0.275; 0.488, respectively). Conclusion: Within the limitations of this in vitro study, it is important to select the proper luting material considering the structure and thickness of the CAD/CAM restoration, along with manufacturers’ instructions. Keywords: CAD/CAM block, degree of conversion, dual-cure resin cement, flowable composite, lithium dislocate glass-ceramic, luting material, nano-ceramic hybridPublication Metadata only Mine yüzeyinde artık rezin temizlemek Için kullanılan farklı tekniklerin etkinliğinin değerlendirilmesi(2022-11-06) KORKUT, BORA; KAHRAMANOĞLU, ERKUT; TAĞTEKİN, DİLEK; KORKUT B., Uzun K. E., Haciali C., ÖZTÜRK B., KAHRAMANOĞLU E., TAĞTEKİN D.Publication Metadata only Fracture Resistance of Porcelain Laminate Veneers(AVES PRESS LTD, 2018) KAHRAMANOĞLU, ERKUT; Tugcu, Erhan; Kahramanoglu, Erkut; Aslan, Yilmaz Umut; Ozkan, YaseminIn recent dentistry, laminate veneers have gained widespread utilization as a conservative treatment option of unaesthetic anterior teeth. The continued development of dental ceramics offers clinicians many options for creating highly aesthetic and functional porcelain veneers. The behavior of these restorations against the functional loads plays an important role in their success. Many studies have evaluated the fracture resistance of laminate veneers in vitro and in vivo.Publication Open Access Stabilizasyon splinti tedavisinin fonksiyonel çene hareketleri ve ağrı üzerine etkisinin retrospektif değerlendirilmesi(2020-02-01) KAHRAMANOĞLU, ERKUT; ŞANIVAR ABBASGHOLIZADEH, ZELİHA; Kahramanoğlu E., Şanıvar Abbasgholızadeh Z., Özkan S.Amaç: Bu çalışmanın amacı, temporomandibular rahatsızlığı bulunan ve stabilizasyon splinti ile tedavi edilmiş hastaların fonksiyonel çene hareketleri ve vizüel ağrı skalası (VAS) değerlerini retrospektif olarak değerlendirmektir. Gereç ve Yöntem: TMR/ATK ‘ne göre muayene edilmiş ve MRG ile tek taraflı disk deplasmanı teşhisi konulmuş 20 hastanın arşiv verileri kullanılmıştır. Hastaların 1.ay, 3.ay ve 6.aydaki fonksiyonel çene hareketleri (ağrısız ağız açıklığı, protruziv, kontralateral ve ipsilateral hareket miktarları) ve VAS değerleri retrospektif olarak değerlendirilmiştir. Bulgular: 1. ayın sonunda protruziv hareket miktarı dışında tüm fonksiyonel çene hareketleri anlamlı olarak artmış ve VAS değerleri anlamlı olarak azalmıştır. 6. ayın sonunda ise tüm fonksiyonel hareketler anlamlı olarak artmıştır (p<0,05). Sonuçlar: Stabilizasyon splinti tedavisi, temporomandibular ekleminde redüksiyonlu/ redüksiyonsuz disk deplasmanı bulunan hastalarda mandibular hareket miktarlarında artış sağlayarak, hastaların ağrı semptomlarını azaltmıştır. Anahtar kelimeler: Stabilizasyon splinti, temporomandibular rahatsızlık, fonksiyonel çene hareketiPublication Open Access Microleakage and Marginal Integrity of Direct and Indirect Composite Resin Restorations in MOD Cavities After Thermo-Mechanical Loading(MARMARA UNIV, INST HEALTH SCIENCES, 2021-05-10) ŞENOL, AYŞE ASLI; Senol, Ayse Asli; Atali, Pinar Yilmaz; Kahramanoglu, ErkutObjective: The aim of this in vitro study is to compare the microleakage of mesial-occlusal-distal (MOD) composite resin restorations made by using CAD/CAM block and methacrylate/ormocer-based direct resin composites after thermo-mechanical loading. Methods: Standard 40 noncarious human third mandibular molars were selected for the study. Standardized MOD (3x4x2mm) cavities were prepared on the mesial and distal sides. The gingival margin was placed above the cementoenamel junction (CEJ) on the mesial side and below the CEJ on the distal side. The prepared samples were divided into three experimental groups [indirect group-GrandioBlock (GB), directmethacrylate group-TetricN-Ceram+TetricN-Flow (T+TF), direct-ormocer group-Admira Fusion+Admira Fusion Flow (A+AF)] and control group [direct-methacrylate group-GrandioSo+GrandioSoFlow (G+GF)] (n=10). After finishing restorations samples were subjected to 50 N to 240.000 thermo-mechanical cycles (5-55 degrees C, for 60 sec) and kept in 0.2% methylene blue. Samples sectioned longitudinally in the mesiodistal direction with a precision cutting device were examined under stereomicroscope at X8 and X25 and microleakage values were scored. In the evaluation of the data, descriptive statistical methods as well as the chi-square test was used for the comparison of qualitative data. Results: No significant difference was found among the coronal and gingival-enamel microleakage distributions of the groups (p>0.05). A statistically significant difference was observed among the gingival-cementum microleakage distributions of the groups (p=0.003). The distribution of gingival-cement microleakage with the no dye penetration score in the T+TF group was found to be statistically significantly lower than the G+GF and GB groups (p = 0.010, p = 0.001). Conclusion: Under the limitation of this in vitro study; restoring MOD cavities using different matrix structures of the composites could not eliminate the leakage at the gingival seat under CEJ.Publication Metadata only Bulk-fill kompozit rezinlerin antagonist çelik top ve CAD CAM blok karşısında aşınma dirençlerinin karşılaştırılması(2022-11-06) ŞENOL, AYŞE ASLI; KAHRAMANOĞLU, ERKUT; YILMAZ ATALI, PINAR; TÜRKMEN, CAFER; Altuntaş E., Öztürk S., Şenol A. A., Kahramanoğlu E., Yılmaz Atalı P., Türkmen C.Bulk-fill Kompozit Rezinlerin Antagonist Çelik Top ve CAD/CAM-Blok Karşısında Aşınma Dirençlerinin KarşılaştırılmasıEzgi Altuntaş1, Selinsu Öztürk1, Ayşe Aslı Şenol1, Erkut Kahramanoğlu2, Pınar Yılmaz Atalı1, Cafer Türkmen11Marmara Üniversitesi Diş Hekimliği Fakültesi, Restoratif Diş Tedavisi Anabilim Dalı2Marmara Üniversitesi Diş Hekimliği Fakültesi, Protetik Diş Tedavisi Anabilim DalıAMAÇKompozit rezinler, antagonist materyal tarafından mekanik kuvvetlere maruz kaldığında aşınmaktadır. Aşınma sonucu mekanik özellikleri azalmakta, bu nedenle uzun süreli klinik başarıları olumsuz etkilenmektedir. Bu çalışmanın amacı iki farklı bulk-fill kompozit rezinin çelik top ve cad/cam blok karşısında aşınma dirençlerinin karşılaştırılmasıdır.GEREÇLER ve YÖNTEMLERVisCalor-Bulk (VOCO) ve SonicFill 2 (Kerr) bulk-fill kompozitler ile4x10mm boyutlarında 32 adet kompozit disk hazırlandı. Kompozit diskler 20 saniye boyunca VALO (Ultradent) ile polimerize edildi. 4 farklı grene sahip cila diskleri ile cilaları tamamlandık sonra37°C distile suda 24 saat boyunca bekletildi. Örnekler randomize olarak kompozitlere göre 2 gruba ayrıldıktan sonra antagonist materyale göre de 2 alt gruba (n=8) ayrıldılar; Grup-1-VisCalor-Steel (VS), Grup-2-VisCalor-CAD (VC), Grup-3-Sonicfill-Steel (SS), Grup-4-Sonicfill-CAD (SC).Ağız ortamını taklit edebilmek için örneklere termal döngü (5-55°C) ile birlikte dual akslı çiğneme simülatöründe iki gövdeli aşınma testi (120,000 cycles, 49N) (C-S-4; SD-Mechatronik Company) uygulandı. Örnekler, yüklemeden önce ve sonra lazer tarayıcı (LAS-20, SD Mekatronik) ile tarandı. Geomagic programı kullanılarak gruplar arası hacimsel aşınma miktarı analiz edildi.Her gruptan rastgele seçilen bir örnek, taramalı elektron mikroskobu altında değerlendirildi. Veriler iki yönlü ANOVA testi ile incelendi(p=0.05).
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