Browsing by Author "Barut, Guher"

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Citation Count: 1
Influence of Different Dentin Conditioning Protocols on Bond Strength of a Bioceramic Root Canal Filling
(Univ Zagreb, Sch dental Medicine, 2023) Ciftcioglu, Elif; Çiftçioğlu, Elif; Isik, Vasfiye; Arican, Burcin; Karagoz-Kucukay, Isil; Endodonti / Endodontics
Objective: Bioceramic-based sealers, in combination with bioceramic-coated gutta-perchas, have be-come more commonly used in root canal obturation. The present study aimed to assess the influ-ence of laser-assisted dentin conditioning compared with conventional conditioning protocols on the push-out bond strength (PBS) of a bioceramic-based root canal filling. Material and Methods: Sixty extracted mandibular premolars with one root canal were instrumented with EndoSequence rotary files up to size 40/0.04. Four types of dentin conditioning protocols were used: 1) 5.25% NaOCl (con-trol), 2) 17% EDTA+5.25% NaOCl, 3) Diode laser-agitated 17% EDTA+5.25% NaOCl, 4) Er,Cr:YSGG laser irradiation+5.25% NaOCl. Teeth were obturated using the single-cone technique with Endo -Sequence BC sealer+BC points (EBCF). After having obtained 1-mm-thick horizontal slices from the apical, middle and coronal root thirds, push-out test was carried out, and failure modes were de-termined. The data were analyzed by two-way analysis of variance and Tukey's test with a signifi-cance level of p<0.05. Results: The apical segments showed the highest PBS in all groups (p<0.05). In the apical segments, EDTA+NaOCl and diode laser agitated EDTA increased the PBS compared to the control (p=0.0001) and Er, Cr: YSGG laser (p=0.011 and p=0.027, respectively) groups. Both la-ser-used groups revealed significantly higher PBS values in the middle and coronal segments than EDTA+NaOCl (p<0.05). The bond failure was predominantly cohesive without any significant differ-ence among the groups (p>0.05). Conclusions: Laser-assisted dentin conditioning had distinct ef-fects on the PBS of the EBCF at different root segments. Although Er, Cr: YSGG was ineffective in the apical segments, generally, laser-assisted dentin conditioning affected PBS more favorably than con-ventional irrigation groups, with a more pronounced effect in the diode laser-agitated EDTA group.
Citation Count: 5
Influence of Post Space Preparation on the Apical Leakage of Calamus, Single-Cone and Cold Lateral Condensation Obturation Techniques: A Computerized Fluid Filtration Study
(Wiley, 2019) Ozkurt-Kayahan, Zeynep; Barut, Guher; Ulusoy, Zuhal; Orucoglu, Hasan; Kayahan, Mehmet Baybora; Kazazoglu, Ender; Haznedaroglu, Faruk
Purpose Apical microleakage between the root canal and periapical tissues is considered a common cause of endodontic failure. The aim of this study was to evaluate the apical microleakage of various obturation techniques after immediate post space preparations with different drills. Materials and Methods One hundred twenty human single-rooted teeth were selected for this study. The coronal portions were removed to achieve a uniform length of 15 mm. All root canals were instrumented with ProTaper Next rotary files using crown-down technique. The 120 roots were randomly assigned to 3 experimental groups according to obturation technique (n = 40). The root canals were obturated with lateral condensation in group 1, single-cone technique in group 2, and Calamus 3D obturation system in group 3. Each group was divided into two subgroups (n = 20) according to drill types (Gates Glidden and Peeso drills) leaving 5 mm of apical gutta-percha. The apical microleakage was measured using the computerized fluid filtration meter method. The results were evaluated using Kruskal-Wallis test with Bonferroni Corrected Mann-Whitney U multiple comparison post hoc tests. Results There was no statistically significant difference between obturation techniques after post space preparation with Peeso drills (p > 0.05). In Gates Glidden drill groups, single-cone technique demonstrated higher leakage (0.0051 +/- 0.0037 mu l x min(-1) x cmH(2)O(-1)) than Calamus techniques (0.0019 +/- 0.0012 mu l x min(-1) x cmH(2)O(-1)) (p < 0.017). Conclusions Gates Glidden drills caused the highest apical leakage in teeth obturated with single-cone technique.