Person: ERŞAHAN EROĞLU, ŞEYDA
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Publication Metadata only Changes in human pulp blood flow during canine retraction(2016-01-01T00:00:00Z) Sabuncuoglu, Fidan Alakus; Ersahan, Seyda; ERŞAHAN EROĞLU, ŞEYDAAim: To evaluate the effects of maxillary canine retraction on pulpal blood flow (PBF) in humans as recorded by laser Doppler flowmetry (LDF).Methods: Maxillary canines of 24 participants were divided into two groups (n=12 each). Teeth in the study group underwent maxillary canine retraction using mini-implants as anchorage for approximately 4 months, with 100g of force applied via coil springs. Subjects in the control group received no orthodontic treatment. LDF measurements were recorded at baseline (T0); during retraction, at 24hours (T1), 3 days (T2), 7 days (T3) and 1 month (T4); and at the end of retraction (T5) in the study group and at similar time-points in control subjects. Data were analyzed using the Friedman, Wilcoxon signed rank and Mann-Whitney U tests, with the significance level set at 0.05.Results: No significant changes in PBF perfusion units (PU) were observed in the control group over the course of the study. However, PBF in the study group increased significantly from T0 (3.60.2 PU) to T1 (3.7 +/- 0.2 PU, p<0.001) and decreased severely from T1 to T2 (3.3 +/- 0.1, p<0.001). PBF in the study group was still significantly lower at T3 (3.4 +/- 0.1 PU, p<0.001) in comparison to T0; however, at T4 and T5, PBF was found to have returned to pre-retraction levels.Conclusion: The fact that PBF values returned to initial levels within one month of the initiation of retraction despite short-term, hyperaemic, regressive changes demonstrates that the changes observed in PBF during canine retraction are reversible.Publication Metadata only Solubility and apical sealing characteristics of a new calcium silicate-based root canal sealer in comparison to calcium hydroxide-, methacrylate resin- and epoxy resin-based sealers(2013-05-01T00:00:00Z) Ersahan, Seyda; AYDIN, Cumhur; ERŞAHAN EROĞLU, ŞEYDAAim. To assess and compare the water sorption, solubility and apical sealing ability of iRoot SP and three other widely used root canal sealers. Materials and methods. Solubility was assessed by immersing standardized samples of calcium silicate( iRoot SP), calcium hydroxide-(Sealapex), methacrylate resin- (EndoREZ) and epoxy resin-(AH Plus) based sealers in distilled water and measuring weight gain and weight loss at 6 h, 24 h and daily for 14 days. Roots of extracted mandibular premolars (n = 80) were prepared with 0.04-taper nickel-titanium rotary files to a final size 40. Roots were then randomly divided into four experimental groups (n = 18) and two control groups (n = 4), root canal sealers were applied and apical leakage was assessed using the fluid filtration method. Data was analyzed using Kruskal Wallis analysis of variance and Mann-Whitney U-tests, with the level of significance set at p <= 0.05. Results. EndoREZ exhibited the highest water sorption, followed by iRoot SP, Sealapex and AH Plus. Sealapex exhibited significantly higher solubility than the other sealers, whereas no significant differences in solubility levels were observed between the other three sealers tested. AH Plus exhibited significantly lower microleakage than Sealapex and EndoREZ, whereas no difference in microleakage was found between AH Plus and iRoot SP. Conclusions. In view of the study findings, all tested sealers except Sealapex met the ANSI/ADA-s requirements for solubility and no difference was found between AH Plus and iRoot SP in terms of apical sealing ability.Publication Metadata only PLATELET-RICH PLASMA TREATMENT IN TWO CASES(2017-05-13) ERŞAHAN EROĞLU, ŞEYDA; Akgün, Özlem Martı; ERŞAHAN EROĞLU, ŞEYDAPublication Metadata only Changes in maxillary incisor dental pulp blood flow during intrusion by mini-implants(2014-10-01T00:00:00Z) SABUNCUOGLU, Fidan Alakus; Ersahan, Seyda; ERŞAHAN EROĞLU, ŞEYDAAim. The aim of this clinical study was to identify changes in pulpal blood flow (PBF) in human central incisors resulting from short-and long-term intrusive orthodontic forces from mini-implants. Materials and methods. A total of 40 sound upper central and lateral incisors in 20 patients scheduled for intrusion for orthodontic reasons were divided into two groups. From each group, 20 teeth were subjected to intrusive force from mini-implants (Group 1 = Light Force: 40 g; Group 2 = Heavy Force: 120 g), whereas the remaining 20 contralateral teeth were not subjected to forces from mini-implants and served as controls. Laser-Doppler flowmetry (LDF) measurements were recorded at baseline and at 3 days and 3 weeks following intrusion. Results. PBF decreased significantly at 3 days (Light Force Group: 7.72 +/- 0.50; Heavy Force Group: 7.72 +/- 0.52) and then increased towards baseline at 3 weeks (Light Force Group: 10.37 +/- 0.58; Heavy Force Group: 10.31 +/- 0.45) following intrusion. Conclusions. In other words, despite slight regressive changes in pulpal tissue in the short-term, PBF improved after 3 weeks following intrusion by mini-implants, indicating that the changes observed in PBF is reversible, even following radical incisor intrusion.Publication Metadata only Erişkin bir hastada üst lateral ve kanin transpozisyonunun multidisipliner tedavisi.(2016-07-01) SABUNCUOGLU, FIDAN ALAKUS; Ertürk, Ergül; ERŞAHAN EROĞLU, ŞEYDA; ERŞAHAN EROĞLU, ŞEYDAPublication Metadata only Comparison of the amount of temperature rise in the pulp chamber of teeth during different adhesive clean-up procedures(2017-05-13) ERŞAHAN EROĞLU, ŞEYDA; SABUNCUOGLU, FIDAN ALAKUS; ERŞAHAN EROĞLU, ŞEYDAPublication Metadata only DEBONDING OF CERAMIC BRACKETS BY ER: YAG LASER(2016-01-01T00:00:00Z) Alakus-Sabuncuoglu, Fidan; ERŞAHAN EROĞLU, ŞEYDA; Erturk, Ergl; ERŞAHAN EROĞLU, ŞEYDAPurpose: The objective of the present study is to evaluate the effects of Er: YAG laser debonding of ceramic brackets on the bond strength and the amount of adhesive resin remnant. Materials and Methods: Twenty human mandibular incisors were randomly divided into two groups of 10 and polycrystalline ceramic brackets (Transcend series 6000, 3M Unitek, Monrovia, CA, USA) were bonded on enamel surfaces. Group 1 was the control group in which no laser application was performed prior to the shear bond strength (SBS) testing. In Group 2, Er: YAG was applied in 3W power for 6 seconds using the scanning method. The brackets were tested for SBS with an Instron universal testing machine and results were expressed in megapascals (MPa). The amount of adhesive remnant was evaluated with Adhesive Remnant Index (ARI). One-way analysis of variance and Tukey-s post-hoc tests were used for statistical analysis. Results: Mean +/- standard deviation of SBS values in the control group was 13.42 +/- 1.23 MPa and 8.47 +/- 0.71 MPa in the Er: YAG group and this difference was statistically significant (p<0.05). The evaluation of ARI scores demonstrated more adhesive was left on the enamel surface with Er: YAG group. Conclusion: 3W power Er: YAG laser application with the scanning method to polycrystalline ceramic brackets demonstrated lower bond strengths and higher ARI scores during the debonding procedure.Publication Metadata only Dislocation Resistance of iRoot SP, a Calcium Silicate-based Sealer, from Radicular Dentine(2010-12-01T00:00:00Z) Ersahan, Seyda; AYDIN, Cumhur; ERŞAHAN EROĞLU, ŞEYDAIntroduction: The aim of this study was to evaluate the push-out bond strength of iRoot SP (Innovative Bioceramix, Vancouver, Canada) and compare it with that of other widely used root canal sealers. Methods: Sixty extracted human maxillary canines were sectioned transversally below the cement-enamel junction to obtain 120 4-mm-thick dentin disks that were randomly divided into four groups (n = 30) for treatment with one of four different root-canal sealers (iRoot SP, AH Plus [Dentsply DeTrey GmbH, Konstanz, Germany], Sealapex [SybronEndo Corporation, Orange, CA], EndoREZ [Ultradent Inc, South Jordan, UT]). Standardized cavities were prepared to simulate root canals, cavities were filled with sealer material, and push-out bond-strength testing was performed using a universal testing machine. Failure modes were assessed quantitatively under a stereomicroscope and morphologically under a scanning electron microscope. Statistical analysis was performed using one-way analysis of variance and the post hoc Tukey test, with the significance level set at 0.05. Results: Bond strengths of iRoot SP and AH Plus were significantly higher than those of Sealapex and EndoREZ. There was no significant difference between the bond strength of iRoot SP and AH Plus (p = 0.274). Conclusions: iRoot SP and AN Plus performed similarly and better than EndoREZ and Sealapex in terms of bond strength. (J Endod 2010;36:2000 -2002)Publication Metadata only Root canal configurations of third molar teeth. A comparison with first and second molars in the Turkish population(2011-12-01T00:00:00Z) SERT, Semih; SAHINKESEN, Guenes; TOPCU, Fulya T.; Eroglu, Seyda E.; OKTAY, Elif A.; ERŞAHAN EROĞLU, ŞEYDAThe purpose of the current study was to determine the similarities of maxillary and mandibular third molars with the other molar teeth. A total of 2016 extracted maxillary and mandibular permanent teeth were evaluated. The teeth were divided into six groups. The teeth were stored in 5% nitric acid solution for 7 days, then placed in increasing concentrations of ethyl alcohol. The teeth were rendered transparent by immersion in xylene solution for 4 days until complete transparency was achieved. Three roots were present in 93.0% of the maxillary molars, and 91.3% of the second molars. Among the maxillary third molars, 35.5% were single-rooted and 24.9% of the mandibular third molars had single roots. Double roots were present in 69.2% of the mandibular third molars, and 5.4% had three roots. Four new root canal configurations were encountered in this study. The root canal configurations of the mandibular and maxillary teeth showed similarities with the results of other studies performed in different populations.Publication Metadata only A comparison of two pain scales in the assessment of dental pain during initial phase of orthodontic treatment.(2016-07-01) SABUNCUOGLU, FIDAN A.; ERŞAHAN EROĞLU, ŞEYDA; Ertürk, Ergül; ERŞAHAN EROĞLU, ŞEYDA