Browsing by Author "Gunduz, H."
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Article The Effect of Heat-Treated Single-File Systems on Dentinal Crack Formation(Wolters Kluwer Medknow Publications, 2021) Ozlek, E.; Gunduz, H.Objectives: The aim of this study was to compare the formation of dentinal crack after root canal preparation performed with different heat treated single-file systems. Materials and Methods: Forty mandibular premolar teeth were randomly divided into four groups according to the file system to be used during the preparation (n = 10): Group 1: Reciproc Blue; group 2: One Curve; group 3: HyFlex EDM; group 4: (control group) hand files. During the cleaning and shaping, irrigation was performed with a total of 10 ml of 5.25% sodium hypochlorite and 2 mL of distilled water. Then sections were taken from the roots (3, 6 and 9 mm). Sections were examined on a stereomicroscope to determine the presence of cracks. Chi-square test was used for data analysis. Results: There was a significant difference between the groups in dentinal crack frequency (P <.05). HyFlex EDM (13.3%) caused less dentinal crack than One Curve (26.7%) and Reciproc Blue (30%). No cracks were observed in the control group. When 3, 6, and 9 mm were evaluated within themselves, dentinal crack formation did not differ according to the groups (P > 0.05). A statistically higher mean value was obtained in the control group compared to the other groups in terms of working time (P < 0.001). Conclusions: All the files used during root canal preparation formed dentin crack. Hy-Flex EDM caused less dentinal cracks than other file systems. The flexibility of nickel-titanium instruments because of heat treatment seems to have a significant influence on dentinal crack formation. © 2021 Wolters Kluwer Medknow Publications. All rights reserved.Article The Effect of Solution and Gel Forms of Sodium Hypochlorite on Postoperative Pain: a Randomized Clinical Trial(Faculdade De Odontologia De Bauru, 2021) Ozlek, E.; Gunduz, H.; Kadi, G.; Taşan, A.; Akkol, E.Objectives: The aim of this study is to evaluate the effect of using gel and solution forms of NaOCI during the chemomechanical preparation of the root canals on postoperative pain at different time intervals. Methodology: 114 patients with mandibular molar teeth and symptomatic irreversible pulpitis were included in the study. All patients were divided into two groups based on the irrigant used during root canal preparation (n=57): Group 1, 5.25% NaOCI, Group 2, 5.25% NaOCI gel. All groups were filled with gutta-percha and AH Plus root canal sealer using single-cone technique. VAS scale (1-10) was used for postoperative pain assessment. After endodontic treatment, all patients were asked to record their postoperative pain levels at the 6th, 24th, 48th, 72nd hours, and 1 week later. The data were analyzed using Chi-Squared, Independent Samples T, Cochran Q and Friedman tests. Results: Statistically significant difference was not found between the distributions of pain levels at different times according to the groups (p>0.050). A statistically significant difference was observed between the distributions of pain levels measured at different times in the solution group (p<0.001). A statistically significant difference was found between the distributions of pain levels measured at different times in the gel group (p<0.001). In both groups, highest postoperative pain levels occurred in the first 6 hours. Pain levels of the gel group as 38,5% mild, 17.3% moderate, 5.8% severe and pain levels of the solution group were obtained as 46.2% mild, 26.9% moderate, 9.6% severe at the 6th hour. Conclusions: The use of the gel form of NaOCI during the chemomechanical preparation of the root canals showed similar postoperative pain when compared to the solution form. © 2021, Faculdade De Odontologia De Bauru. All rights reserved.