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KAHRAMANOĞLU, ERKUT

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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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    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 hybrid
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    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.
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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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    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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    Effect of Polyethylene Fiber on Fracture Resistance of Bulk-fill Composites
    (2023-07-03) MANAV, AYBİKE; DOĞU, BENGÜ; YILMAZ ATALI, PINAR; KAHRAMANOĞLU, ERKUT; ŞENOL, AYŞE ASLI; TARÇIN, BİLGE; TÜRKMEN, CAFER; MANAV ÖZEN A., DOĞU KAYA B., YILMAZ ATALI P., KAHRAMANOĞLU E., ŞENOL A. A., TARÇIN B., TÜRKMEN C.
    Introduction: The aim of this in vitro study was to evaluate the fracture resistance of sonic-activated SonicFill3 (SF) (Kerr) and flowable Charisma Bulk Flow ONE (CO) (Kulzer) bulk-fill composites with or without polyethylene-fiber (R) (Ribbond) application. Materials and Methods: Class I cavities (2x2x4mm) were prepared on 40 freshly extracted human premolars of similar size and classified randomly into 4 groups (SF, SF+R, CO, CO+R). The remaining wall thicknesses of the teeth was confirmed to be 2mm. Ribbond fiber (2x2mm) was applied to cavity bases of the acryl-embedded teeth according to manufacturers’ instructions and OptiBond (Kerr) (for SF, SF+R groups) and Gluma Bond (Kulzer) (for CO, CO+R groups) universal adhesives were used. All specimens were restored in a 4mm monolayer with SF and CO. Valo Cordless (Ultradent) LED-curing unit with a power output of 1000 mW/cm2 was preferred for polymerization. Finishing and polishing were completed with the last 2 stages of Sof-Lex discs (Kerr). Restored teeth were stored in distilled water at 37°C for 24 hours. Fracture resistance (FS) and elastic modulus (EM) values were measured with a universal testing device (Shimadzu AG-X, Shimadzu Corp, Japan). Data were analyzed with IBM SPSS V23 using Independent samples T-test. The significance level was set at p<0.05. Results: No statistically significant difference was found between the bulk-fill composites (SF and CO) without R (p=0.167). Similarly, no significant difference was detected between the Ribbond fiber applied groups (SF+R and CO+R) (p=0.994). The effect of fiber application on FS of SF (p=0.421) and CO (p=0.552) was not statistically significant. The mean maximum force values (newtons) in decreasing order were CO (761.09±224.32) > SF+R (671.08±150.51) > CO+R (669.95±358.44) > SF (580.7±269.04). The EM values of SF and CO were statistically significantly different (p=0.009). A statistically significant difference was observed between the EM values in the Ribbond fiber applied groups (SF+R and CO+R) (p=0.026). EM values of CO were statistically significantly higher regardless of Ribbond application (p<0.001). Conclusion: Within the limitations of this in vitro study, the application of SonicFill3 and Charisma Bulk Flow ONE composites with Ribbond may be an option for clinical applications. Keywords: bulk-fill composite, elastic modulus, fracture resistance, polyethylene fiber
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    Tümüyle Dişsiz Bir Hastanın İmplant Destekli Protez ile Tedavisi İçin Ogmentasyonu: Bir Olgu Sunumu
    (2022-10-19) KAHRAMANOĞLU, ERKUT; KÖSE, KEMAL NACİ; Gündüz G., Cüce İ., Kahramanoğlu E., Köse K. N.
    AMAÇ: Total dişsiz hastaların protetik tedavisinde uygun olmayan yumuşak ve sert dokuların düzeltilerek protez için uygun hale getirilmesi hem başarılı bir tedavi için hem de hastanın sağlığı ve konforu için büyük öneme sahiptir. Bu olgu raporunda frenektomi, klasik serbest diş eti grefti ve akordeon tekniği kullanılan serbest diş eti greftlerinin kullanıldığı pre-protetik periodontal cerrahi ve sert doku düzeltilmesine yönelik osteoektomi/osteoplastinin kullanıldığı yüksek frenilum, sığ vestibule ve egzositozlara bağlı sert doku çıkıntıları olan bir hastanın tedavisi sunulmaktadır. OLGU SUNUMU: Kliniğimize önceki protezlerini kullanamama ve ağrı şikayetiyle gelen 56 yaşındaki sağlıklı kadın hastanın yapılan muayenesinde yüksek labial freniluma, sığ vestibüle ve düzensiz kemik çıkıntılarına sahip olduğu görüldü. Protez Anabilim Dalı ile konsültasyon sonrasında, öncelikle labial frenektomi ve tüm kadranlar için yumuşak dokuların frenektomi, serbest diş eti greftleri ve gerektiğinde accordion tekniği ile yapılan greftlemeler ile ogmentasyonu yapılmasına karar verildi. Üst çenesi, klasik hareketli total protez ile alt çenesi ise 4 implant destekli overdenture ile tedavisi tamamlanacaktır. Alt çenedeki mevcut sert doku çıkıntıları ise implant cerrahisi sırasında osteoektomi/osteoplasti ile uzaklaştırılacaktır. Frenektomi ve yumuşak doku cerrahilerinin tamamlanmasından 8 hafta sonra implantlar yerleştirildi ve ilgili bölgelerdeki sert doku düzensizlikleri düzeltildi. 3 aylık osseointegrasyon süresini takiben iyileşme vidalarının takıldığı ikinci cerrahi işlemleri yapıldı. 6 haftalık iyileşme periodu sonrasında protezlerinin yapılması için Protez bölümüne gönderildi. Protezlerin tamamlanmasından sonraki 1 yıl içerisinde hastanın çok rahatlıkla protezlerini kullandığı, herhangi bir şikâyetinin olmadığı görüldü. SONUÇ: Bu olgu sunumu, tümüyle dişsiz hastaların protetik rehabilitasyonunda başarılı bir tedavi için periodontal pre-protetik cerrahileri de içeren iyi planlanmış bir tedavi planlamasının yadsınamaz olduğunu desteklemektedir. Anahtar Kelimeler: Diş implantasyonu; Diş protezi; İmplant destekli; Mukogingival cerrahi; Serbest diş eti grefti
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    Termoviskoz bulkFill kompozit rezin ile antagonist CAD CAM bloğunun aşınma direncinin incelenmesi
    (2022-04-23) ŞENOL, AYŞE ASLI; KAHRAMANOĞLU, ERKUT; YILMAZ ATALI, PINAR; TÜRKMEN, CAFER; Altuntaş E., Öztürk S., Şenol A. A., Kahramanoğlu E., Yılmaz Atalı P., Türkmen C.
    Molar incisor hypomineralization (MIH) is an enamel defect that develops in the molar and incisors as a result of exposure of ameloblast cells to various environmental and systemic factors during the maturation phase of amelogenesis, thus causing aesthetic concerns. In this case report microabrasion and home bleaching was planned for the treatment of MIH.A 17 years old female patient who referred to our clinic with the chief complaint of white lesions on maxillary incisor teeth, were examined clinical and radiographically In both the maxillary and mandibular arch, visible opacities were detected and microabrasion and home bleaching techniques were planned for the treatment of lesions. Before microabrasion application, Tooth Mousse Gel (GC) was applied on the lesions for two weeks. Shade selection was performed by spectraphotometer (Vita EasyShade V). Under the rubber dam isolation (maxillary-arch) and gingival barrier (mandibullary-arch) Opalustre (Ultradent) was applied in 3 consecutive cycles using OpalCups (Ultradent) according to manufacturer’s guidelines. Fluoride varnish (4% NAF, ProShield, President Dental) was applied for 4 minutes following the microabrasion. Home bleaching gel was applied for 5 weeks with custom made bleaching tray using 16% Carbamide Peroxide (Opalescence PF, Ultradent) Patient were recalled for 7,14,21,28 and 35 day. For the examination of the lesions and color of teeth.The using of ACP-CPP containing gel before the treatment, made a difference in the visibility of enamel hypomineralizations. The shades of incisor teeth which, was the patient’s complaint was B3 initially A2 after microbrasion and A1 after bleaching. The patient was satisfied with the treatment results.Application of remineralisation gel for two weeks, reduced the size of enamel hypomineralizations.The combined use of microabrasion and home bleaching is more effective in reducing lesions, eliminating aesthetic concerns and provided a more comfortable treatment process for the patient with MIH.