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Öğe Bond strength of repaired composite resins: surface treatments, adhesive systems, and composite type(Taylor & Francis Ltd, 2016) Karaarslan, Emine Şirin; Özsevik, Abdul Semih; Cebe, Mehmet Ata; Sürmelioğlu, Hatice Derya Gürsel; Tosun, SametThe aim of the present study was to investigate the effects of three different surface treatments and two different adhesives on the microtensile bond strength (TBS) of repaired composites using the same or different type of resin. Twenty-four nano-hybrid (Ceram X mono-C) and 24 nanofilled (Filtek Ultimate-F) composite discs were prepared. The specimens were aged with 5000 thermocycles and randomly divided into groups according to the surface treatment methods: (a) phosphoric acid (b) Er:YAG laser and (c) aluminum trioxide particle (air abrasion). Fresh composite resins (C and F) were added to the treated surfaces with two different adhesives (two-step and one-step self-etch adhesives). Then, the specimens were aged again. The stick-shaped specimens were prepared from the discs (n=25) and the sticks were subjected to the TBS test. Results indicated that significant differences were found in TBS values among the surface treatment methods. In the C groups, the highest TBS value (41.3 +/- 8.3MPa) was recorded in the air abrasion and one-step self-etch adhesive group, which were repaired with the same kind of composite. In the F groups, the highest TBS value was observed in the air abrasion and one-step self-etch adhesive (37.6 +/- 12.3MPa) group. The treatment with air abrasion is more effective than the others, and it may be suggested for composite repair.Öğe Bond strengths of a self-etching adhesive to dentin surfaces treated with saliva, blood, and different hemostatic agents(Academy of General Dentistry, 2015) Ünlü, Nimet; Cebe, Fatma; Cebe, Mehmet Ata; Çetin, Ali Rıza; Çobanoğlu, NevinThe aim of this study was to evaluate the microtensile bond strengths of a self-etching adhesive to dentin surfaces after treatment with 4 different hemostatic agents in the presence of saliva and blood. After testing, no significant differences were found between the mean bond strength of Clearfil SE (CSE) Bond resin adhesive to normal dentin and those of CSE to dentin treated with the hemostatic agents ViscoStat Clear, Astringedent, or Astringedent X (P > 0.05). However, the mean bond strength of CSE Bond to dentin treated with Ankaferd Blood Stopper (ABS) was significantly greater than those of the other groups (P < 0.05). Thus, while 3 of the tested hemostatic agents did not have significant effects on the bond strength of composite resin to dentin, ABS increased the bond strength of CSE Bond to dentin.Öğe Bonding performance of two newly developed self-adhering materials between zirconium and dentin(Medknow Publications & Media Pvt Ltd, 2015) Cebe, Mehmet Ata; Polat, Serdar; Cebe, Fatma; Tunçdemir, Makbule Tuğba; İşman, ErenPurpose: This study evaluated the effect of four resin materials on the shear bond strength (SBS) of a ceramic core material to dentin. Materials and Methods: Sixty molar teeth were embedded in a self-curing acrylic resin. All specimens were randomly divided into four groups of teeth, each according to the resin cement used. Sixty cylinders were then luted with one of the four resin materials to dentin (GC EQUIA, Panavia F, Variolink II and Vertise). Then, specimens were stored in distilled water at 37 (o) C for one day. Shear bond strength of each specimen was measured using a universal testing machine at a crosshead speed of 0.5 mm/minute. The bond strength values were calculated in N, and the results were statistically analyzed using a Kruskal-Wallis and Bonferroni corrected Mann-Whitney U tests. Results: The shear bond strength varied significantly depending on the resin materials used ( P < 0.05). The specimens luted with GC EQUIA showed the highest shear bond strength (25.19 6.12), whereas, the specimens luted with Vertise flow (8.1 2.75) and Panavia F (11.17 3.89) showed the lowest. Conclusion: GC EQUIA material showed a higher shear bond strength value than other resin materials.Öğe Comparison of different caries detectors for approximal caries detection(Elsevier Taiwan, 2016) Bozdemir, Esin; Aktan, Ali Murat; Özsevik, Abdülsemih; Kararslan, Emine Şirin; Çiftçi, Mehmet Ertuğrul; Cebe, Mehmet AtaBackground/purpose: Detection of approximal caries may be difficult using conventional methods including visual inspection (VI) and radiography. The purpose of this in vitro research was to evaluate the efficiency of light-emitting diode (LED) and laser fluorescence (LF) devices, and radiographic and visual examination in approximal caries diagnosis. Materials and methods: One hundred and fifty-six approximal regions were evaluated. All approximal regions were investigated using LED and LF tools after radiography and VI were performed. Histological evaluation of teeth was performed using stereomicroscopy. The area under the receiver operating characteristic curve and accuracy, specificity, sensitivity values calculated regarding approximal caries diagnose. Results: The specificity of the bitewing examination was higher for both T1 and T2 thresholds (0.97 and 0.99, respectively), and the LF device showed better sensitivity at each threshold compared with the other devices used for caries diagnosis (0.94 at T1 and 0.79 at T2). The receiver operating characteristic curves presented that the LF device was more successful than the other techniques at T1 threshold and VI was better than the other caries detection methods at T2 threshold. The kappa values for interobserver agreements were 0.43 (LF pen), 0.33 (LED device), 0.55 (VI), and 0.75 (bitewing examination). Conclusion: The ability of bitewing radiography to identify sound surfaces was better than that of the other methods. The LF device was the most sensitive tool for detecting approximal surfaces with caries, followed by the LED device. Copyright (C) 2016, Association for Dental Sciences of the Republic of China. Published by Elsevier Taiwan LLC. This is an open access article under the CC BY-NC-ND license.Öğe Comparison of eluted monomer from different indirect and direct resin composites(Taylor & Francis Ltd, 2017) Cebe, Fatma; Cebe, Mehmet Ata; Polat, Serdar; Bıçakçı, HasanIndirect resin composites used in indirect restorations have been used as alternative methods to avoid the negative effects of a direct application. The composition and structure of these are similar to a direct composite. Several authors have discussed the elution monomer from resin composites because it is a crucial factor in optimizing the physical properties and biocompatibility of resin composites. The aim of this study was to compare the elution of monomers from different resin composites using high-performance liquid chromatography (HPLC). Indirect composites including Signum, Gradia, and Solidex, and direct composite Filtek Ultimate were used. The samples (2 x 5 mm) were prepared and polymerized for 20 seconds with a light-emitting diode unit. A secondary curing was then applied to the indirect resin composites. After fabrication, each sample was immediately immersed in a 75 wt% ethanol/water solution and analyzed by HPLC. The obtained data were analyzed with one-way ANOVA and Tukey HSD (p < 0.05). Residual monomers were eluted from indirect and direct resin composites and the amount of eluted monomers increased over time. The highest mean concentrations of residual Bis-GMA, UDMA, TEGDMA, and HEMA were detected with the Filtek Ultimate (2,342 mu M), Solidex (7,908 mu M), Signum (2.8 mu M), and Filtek Ultimate (9.7 mu M), respectively. The highest amount of eluted monomer concentrations detected was viewed as critical for toxic reactions in human cells.Öğe Effect of caries removal techniques on bond strength to caries affected dentin on gingival wall: AFM observation of dentinal surface(Taylor & Francis Ltd, 2016) Cebe, Mehmet Ata; Öztürk, Bora; Karaarslan, Emine ŞirinObjective: The purpose of this study was to evaluate the effect of different caries removal techniques on the bond strength of two adhesive systems. Materials and Methods: Seventy human molar teeth that had proximal carious lesions were randomly divided into four groups according to the technique used to remove the caries: a conventional steel bur, an Er:YAG laser, a chemomechanical Carisolv((R)) gel, and air polishing. The groups were then divided into two subgroups according to the adhesives used: Clearfil S-3 (Kuraray Co., Ltd, Tokyo, Japan) and Adper SE Plus (3M ESPE, St Paul, MN, USA). The enamel and superficial dentin of the crown was flattened and caries were removed using different methods. Teeth were restored with composite and three 1mm(2) stick-shaped microtensile specimens were prepared from each tooth. For each removal technique, the surface roughness of one dentin sample was analyzed using atomic force microscopy (AFM). The microtensile bond strength data were then analyzed using a two-way ANOVA, Kruskal-Wallis and Mann-Whitney U tests, and multiple comparison tests (p=0.05). Results: The two-way ANOVA showed that the effects of the cavity preparation techniques and adhesive systems and their interaction were statistically significant (p<0.05). The TBS values were highest when bonding with Adper SE Plus to cavities prepared with the steel bur (37.20 +/- 11.65MPa) and lowest when bonding with Clearfil S-3 Bond to cavities prepared with the Er:YAG laser (16.74 +/- 6.95MPa). Conclusion: The caries removal techniques affected the bond strength values of the self-etch adhesive systems.Öğe Effect of caries removal techniques on the bond strength of adhesives to caries-affected primary dentin in vitro(Ariesdue Srl, 2013) Yıldız, E; Karaarslan, E. Şirin; Yeğin, Z.; Cebe, Mehmet Ata; Tosun, G.Aim The aim of this in vitro study is to evaluate the effects of three different caries removal techniques on the microtensile bond strength of adhesive materials to caries-affected dentin. Materials and methods Thirty primary molar teeth were used. The teeth were randomly divided into three groups according to the caries removal technique employed: conventional steel bur (group 1); Er:YAG laser (group 2); chemomechanical method (group 3). Each group was divided into two subgroups according to bonding agents: one-step self-etch adhesive and etch-and-rinse adhesive. The teeth were restored with composite resin. Vertical sticks were obtained and subjected to tensile stress. Data were analyzed by two-way analysis of variance (ANOVA), Tukey's test and an independent samples t-test. Results The values for the laser groups were significantly lower than those of the bur groups for both bonding agents (p<0.05). There were no significant differences between the bur and chemomechanical groups (p > 0.05). Conclusion Bur and chemomechanical techniques in primary teeth were found more successful. Similar results were found according to the adhesives used for each caries removal techniques.Öğe Effect of erbium:yttrium aluminum garnet laser on bond strength of a total-etch adhesive system to caries affected dentin on gingival wall(Wolters Kluwer Medknow Publications, 2017) Cebe, Fatma; Bülbül, Mehmet; Şimşek, İrfan; Cebe, Mehmet Ata; Öztürk, BoraPurpose: To assess the effect of the erbium:yttrium aluminum garnet (Er:YAG) laser on bond strength of a total-etch adhesive system to the caries-affected dentin on the gingival wall. Materials and Methods: Ten human molars with proximal carious lesions were randomly divided into two groups. In the first group, the carious dentin was removed with a bur, whereas in the second group it was removed with the Er:YAG laser. Carious lesions were excavated with one of these two techniques until laser fluorescence values decreased to 15 in the center of the lesions. The teeth were then restored with a total-etch adhesive system (Adper Single Bond 2) and composite resin (Filtek Z250). Five teeth from each group were sectioned to obtain 1 mm(2) stick-shaped microtensile specimens from each tooth. Twenty-five specimens were obtained for each group with using this technique. The data were analyzed in independent-samples t-test (a = 0.05). For each removal technique, one sample was analyzed using scanning electron microscopy. Results: No statistically significant differences were found between the bond strength of the Er:YAG laser and the bur-treated groups (P > 0.05). Conclusion: The Er:YAG laser treatment did not negatively affect the bonding performance of the total-etch adhesive system to caries-affected dentin on the gingival wall.Öğe Effects of hemostatic agents on shear bond strength of orthodontic brackets(Wolters Kluwer Medknow Publications, 2015) Okşayan, Rıdvan; Sökücü, Oral; İşman, N. E.; Kayalı, K. M.; Cebe, Mehmet AtaObjectives: The aim of this study was to determine the effects of blood contamination and hemostatic agents on shear bond strength (SBS) of brackets and bond failure. Materials and Methods: The study material consisted of 57 freshly extracted human premolar and randomly divided into four groups: Group I, control group (n0 = 14); Group II, contamination with blood (n = 13); Group III, contamination with epinephrine ( n = 14); and Group IV, contamination with Ankaferd blood stopper (ABS) ( n = 16). After the bracket bonding procedure, all bonded teeth thermal cycled in deionized water at 5 2 degrees C to 55 2 degrees C for 500 cycles. SBS was applied using a universal test machine. Results: According to Kruskal-Wallis test significant differences were found among the groups P < 0.05. Furthermore, significant differences were recorded between groups with Mann-Whitney U statistical test with Bonferroni correction (P = 0.0083). Conclusions: Examples contaminated with blood showed a statistically significant lower in vitro SBS than those contaminated with epinephrine, ABS, and control groups. Clinical Significance: In impacted tooth surgical operations, blood contamination poses a substantial risk of bond failure in bonding attachments applications to the impacted teeth. Epinephrine and ABS may be used on surgical exposed impacted teeth operation for the prevention of blood contamination.Öğe Elution of monomer from different bulk fill dental composite resins(Elsevier Sci Ltd, 2015) Cebe, Mehmet Ata; Cebe, Fatma; Cengiz, Mehmet Fatih; Çetin, Ali Rıza; Arpağ, Osman FatihObjective. The purpose of this study was to evaluate the elution of Bis-GMA, TEGDMA, HEMA, and Bis-EMA monomers from six bulk fill composite resins over four different time periods, using HPLC. Methods. Six different composite resin materials were used in the present study: Tetric Evo Ceram Bulk Fill (Ivoclar Vivadent, Amherst, NY), X-tra Fill (VOCO, Cuxhaven, Germany), Sonic Fill (Kerr, Orange, CA, USA), Filtek Bulk Fill (3M ESPE Dental Product, St. Paul, MN), SDR (Dentsply, Konstanz, Germany), EQUIA (GC America INC, Alsip, IL). The samples (4 mm thickness, 5 mm diameter) were prepared and polymerized for 20s with a light emitted diode unit. After fabrication, each sample was immediately immersed in 75 wt% ethanol/water solution used as extraction fluid and stored in the amber colored bottles at room temperature. Ethanol/water samples were taken (0.5 mL) at predefined time intervals:10 m (T1), 1 h (T2), 24h (T3) and 30 days (T4). These samples were analyzed by HPLC. The obtained data were analyzed with one-way ANOVA and Tukey HSD at significance level of p < 0.05. Results. Amount of eluted Bis-EMA and Bis-GMA from Tetric Evo Ceram Bulk Fill and amount of eluted TEGDMA and HEMA from X-tra Fill higher than others composites (p < 0.05). Significance. Residual monomers were eluted from bulk fill composite resins in all time periods and the amount of eluted monomers was increased with time. (C) 2015 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.Öğe Influence of caries detection dye on composites bond strength of carious affected dentin(Cumhuriyet University Faculty of Dentistry, 2014) Yalçın, Muhammet; Cebe, Fatma; Cebe, Mehmet Ata; Dündar, Ayşe; Öztürk, BoraObjectives: The aim of this in vitro study was to evaluate effect of three different caries detecting dyes on shear bond strength of a self etch adhesive to caries affected dentin. Materials and Methods: 60 extracted human third molars which are affected by caries used in this study. Occlusal surfaces removed to obtain flat dentinal surfaces and teeth mounted acrylic. Specimens were divided into four groups of 15 to be tested three different caries detecting dyes. First group is control and others Caries Detector, Quadrant Cari Test, Sable Seek groups. In control group decayed dentine tissues remowed with silicon carbite papers (300 gride) and in others groups caries detectors applied and carious dentine tissues remowed with silicon carbite papers. Than dentin bonding systems Clearfil SE Bond applied and specimens restorated with composite resin. All products were used according to manufacturer's instructions. Bond strengths were tested and data were statistically analyzed one-way Analysis of Variance (ANOVA) and Tukey tests. Results: As results of this study, Quadrant Cari Test group showed lower bond strength than other detecting dyes groups. While bond strengths of Caries Detector and Sable Seek groups were similar, their bond strengths were significantly higher than Quadrant Cari Test group (p<0,05). Conclusions: According to the results of this in vitro study caries detecting dyes may lead to increased shear bond strength values obtained.Öğe Üç farklı üniversal adeziv sistemin pürüzlendirip yıkamalı ve kendinden pürüzlendirmeli kullanımının makaslama bağlanma dayanımlarının karşılaştırılması(Aves Press Ltd, 2016) Cebe, Mehmet Ata; Bıçakçı, Hasan; Zencirli, Ömer; Cebe, Fatma.Amaç: Bu çalışmanın amacı 3 farklı üniversal adeziv sistemin pürüzlendirip yıkamalı ve kendinden pürüzlendirmeli teknikler ile kullanıldıklarında çürükten etkilenmiş dentinde elde edilen makaslama bağlanma dayanımlarının karşılaştırılmasıdır. Yöntemler: Bu çalışmada 120 adet çekilmiş çürüklü insan büyük azı dişi kullanıldı. Çürük, yüzeyde çürükten etkilenmiş dentine ulaşılana kadar uzaklaştırıldı. Dişler rastgele 6 gruba ayrıldı ve akril kalıplara gömüldü. SBU-s: Single Bond Universal (3M ESPE, St Paul, ABDSBU) kendinden pürüzlendirmeli teknik, ABU-s: All Bond Universal (Bisco Inc, Schaumburg, ABD- ABU) kendinden pürüzlendirmeli teknik, CUB-s: Clearfil Universal Bond (Kuraray Noritake Dental Inc., Okayama, Japonya- CUB) kendinden pürüzlendirmeli teknik, SBU-t: SBU pürüzlendirip yıkamalı teknik, ABU-t: ABU pürüzlendirip yıkamalı teknik ve CUB-t: CUB pürüzlendirip yıkamalı teknik kullanılarak oluşturuldu. Hazırlanan örneklere nanofil kompozit olan Filtek Ultimate Universal Restorative (3M ESPE, St. Paul, ABD) ile restorasyonlar yapıldıktan sonra makaslama bağlanma dayanımı testi yapıldı. Veriler tek yönlü varyans analizi (ANOVA) ve bağımsız t testi ile değerlendirildi (α=0,05). Bulgular: Farklı üniversal adezivlerin pürüzlendirip yıkamalı ve kendinden pürüzlendirmeli kullanımları karşılaştırıldığında anlamlı fark görülmedi (p>0,05). Aynı adezivin farklı kullanımları karşılaştırıldığında ise anlamlı fark sadece CUB grubunda gözlendi. Pürüzlendirip yıkamalı kullanımında daha düşük değerler elde edildi (p<0,05). Sonuç: Üniversal adezivler çürükten etkilenmiş dentinde kullanılacaklar ise kendinden pürüzlendirmeli kullanımları tercih edilebilir.
