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KAHRAMANOĞLU, ERKUT

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KAHRAMANOĞLU

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    PublicationOpen Access
    Bruksizm ve İmplant Başarısı: Literatür Derleme
    (2016-12-09) KAHRAMANOĞLU, ERKUT; Yildiz Domani̇Ç, Kübra; Kahramanoğlu, Erkut; Kulak Özkan, Yasemin
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    PublicationOpen 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; ormocer
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    PublicationOpen 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, Erkut
    Objective: 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.
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    PublicationOpen 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 hareketi
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    PublicationOpen 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, Erkut
    Objective: 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.
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    PublicationOpen Access
    Comparison of Fracture Resistance Between Two Monolithic and One Veneered Zirconia Materials on Molar Crowns After Thermomechanical Fatigue
    (MARMARA UNIV, INST HEALTH SCIENCES, 2020-09-21) KAHRAMANOĞLU, ERKUT; Kayali, Faisal; Kahramanoglu, Erkut
    Objective: The purpose of this in-vitro study is to evaluate fracture resistance of two monolithic and one veneered zirconia crowns on human molar teeth fabricated after thermomechanical fatigue. Methods: Seventy-two human molar teeth were prepared to receive zirconia crowns. The specimens were divided into three experimental groups (n=24) according to restoration design, monolithic or veneered. The crowns were fabricated from GC initial zirconia, Dentsply Sirona TZI and Dentsply Sirona ZI. The prepared teeth were scanned with Sirona inEos X5 and the restorations were milled using Cerec inLab MC X5. The crowns were cemented by resin cement. Twelve crowns of each experimental group underwent thermomechanical fatigue using chewing Simulator for 240 000 chewing cycles with load of (100 N) and thermocycling (5 degrees C/55 degrees C), the remaining 12 crowns in each group did not undergo any thermomechanical fatigue and were considered as control group. All specimens were loaded until fracture using universal testing machine. Forces were applied to occlusal surface with 90 degrees angle. Loads of fracture were recorded. Collected data of fracture loads of all specimens were analyzed using SPSS 23.00 program. Results: Although thermomechanical fatigue significantly decreased fracture loads of only monolithic groups, monolithic zirconia crowns had higher fracture loads than veneered one. Among all specimens, the highest fracture load was found in GC group (5001,81 N) and the lowest was found in ZI group (2117.37 N). Two fracture patterns were observed among monolithic zirconia groups; total and crack, while three fracture patterns were observed in veneered group; porcelain fracture, porcelain and core, porcelain and core with tooth fracture. Conclusion: Thermomechanical fatigue has significant influence on monolithic zirconia, however, it showed higher fracture loads and can be alternative to veneered design.
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    PublicationOpen Access
    Dört Farklı Restorasyon Materyali ile Üretilmiş Onley ve Oklüzal Veneer Restorasyonların Kırılma Dayanımının İncelenmesi
    (2024-04-01) AKMANSOY, ŞÜKRÜ CAN; KAHRAMANOĞLU, ERKUT; Akmansoy Ş. C., Kahramanoğlu E.
    GİRİŞ ve AMAÇ: Bu çalışmanın amacı, farklı restorasyon materyalleri olan cam seramik, hibrit seramik, hibrit kompozit ve kompozit rezin materyalleri kullanarak iki farklı preparasyon şekli ile hazırlanmış restorasyonlarının kırılma dayanıklılığı değerlendirmektir.YÖNTEM ve GEREÇLER: Çalışmamızda 80 adet çekilmiş homojen boyutlarda alt birinci molar diş kullanılarak ve dişler 10’ar dişten oluşan 8 ana gruba ayrıldı. Molar dişler üzerinde preperasyon dizaynı iki farklı alt grup şeklinde, ilk grup oklüzal veneer, ikinci grup ise mezio-oklüzal-distal onley kavitesi şeklinde hazırlandı. Restorasyonlar 4 ayrı materyal (IPS e.max CAD, Vita Enamic, SR Nexco Paste, Grandio Blocs) kullanılarak CEREC InEos Blue (Sirona, Bensheim, Germany) sistemi ile üretildi ve Variolink N siman (Ivoclar Vivadent AG) kullanılarak simante edildi. Kırma testi Shimadzu Universal Testing Kırma Cihazı ile yapılarak uygulanan kuvvet bilgisayar ortamına aktarıldı. Verilerin istatistiksel değerlendirilmesi için Oneway Anova testi ve farklılığa neden olan grupların tespitinde Tukey HDS testi kullanıldı.BULGULAR: Kırılma dayanıklılığı açısından gruplar arasında istatistiksel olarak anlamlı farklılık bulunmaktadır (p>0.05). Nexco Paste ve Vita Enamic materyallerinden üretilen onley restorasyonlarının kırılma dayanıklılığı değerleri diğer gruplara oranla istatistiksel olarak anlamlı derecede daha düşük bulundu.TARTIŞMA ve SONUÇ: Çalışmanın sonucunda, farklı iki kavite dizaynı ve dört restoratif materyalin posterior bölge vakalarında klinik olarak kullanıma uygun olduğu saptanmıştır.Anahtar Kelimeler:Kırılma direnci, CAD/CAM, oklüzal veneer, dental seramik, onley restorasyon