Browsing by Author "Özlek, E."

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Adhesion of Two New Glass Fiber Post Systems Cemented With Self-Adhesive Resin Cements
(MDPI Multidisciplinary Digital Publishing Institute, 2019) Özlek, E.; Neelakantan, P.; Matinlinna, J.P.; Belli, S.; Ugur, M.; Kavut, I.
The aim of this in vitro study was to evaluate the adhesion strength of two new fiber post systems (FiberSite™ Post and Cytec™ Blanco Post) cemented with two different adhesive resin cements (Panavia™ SA and Maxcem™ Elite). Root canals of sixty extracted human mandibular premolars were prepared using ProTaper Universal™ rotary files (Dentsply Sirona Endodontics, York, PA, USA). The root canals were irrigated with 5.25% sodium hypochlorite (NaOCl) during instrumentation. After root canal preparation, the canals were irrigated with 2 mL of 17% EDTA (1 min), followed by 2 mL of 5.25% (5 min) NaOCI, and 2 mL saline. The root canals were dried with paper points and divided randomly into two study groups (n = 30) according to the type of post system: Group 1, FiberSite™ Post (MegaDental, Partanna, Italy); and group 2, Cytec™ Blanco Post (Hahnenkratt, Königsbach-Stein, Germany), with one of the two adhesive resin cements: Subgroup A, Panavia™ SA Cement Plus Automix (Kuraray, Osaka, Japan); subgroup B, Maxcem™ Elite (Kerr, Orange, CA, USA). Following thermocycling, the adhesion strength was evaluated using the push-out adhesion (bond) strength test. Fractographic analysis was performed using stereomicroscope. The data were analyzed using two-way analysis of variance (p = 0.05). The adhesion strength values of both the posts were significantly higher when cemented with subgroup B (Maxcem™ Elite). The highest adhesion strength value was demonstrated by group 1B (FiberSite™ post cemented with Maxcem™ Elite cement). The type of post did not have a significant impact on the bond strength values for either cement material. © 2019 by the authors.
Effect of Using Calcium-Silicate and Silicone Based Root Canal Sealers in Bulk or With Main Core Material on Bond Strength
(Tabriz University of Medical Sciences, 2022) Kadı, G.; Özlek, E.; Saed, Y.
Background. The purpose of this study was to assess the push-out bond strength of calcium-silicate and silicone based root canal sealers in bulk and with main cone. Methods. Roots (n = 48) randomly divided into 4 groups (n = 12) according to the obturation protocol; (1) iRoot SP in bulk; (2) iRoot SP with gutta-percha; (3) GuttaFlow Bioseal in bulk; (4) GuttaFlow Bioseal with gutta-percha. Six horizontal sections were obtained from each root (n = 72). Effect of sealers on bond strength was statistically significant (P < 0.05). Results. Highest mean value was obtained in iRoot-Bulk group and lowest in GuttaFlow Bioseal-GP group. Both iRoot SP groups had significantly higher bond strength values than both GuttaFlow Bioseal groups (P < 0.05). There was no significant difference between iRoot-GP and iRoot-Bulk groups (P = 0.603) also GuttaFlow Bioseal-GP and GuttaFlow Bioseal-Bulk groups (P = 0.684). Conclusion. Based on findings, using calcium silicate-based sealer in bulk can be also suitable in clinical practice. © 2022 The Author(s).
Effectiveness of Different Rotary File Systems in Removing the Root Canal Filling Material: a Micro-Computed Tomography Study
(Tabriz University of Medical Sciences, 2021) Özlek, E.; Gündüz, H.
Background. This study aimed to examine the retreatment efficiency of four NiTi rotary file systems with micro-computed tomography (micro-CT). Methods. Forty premolar teeth were shaped up to F2 using the ProTaper Universal rotary file system and obturated with MTA Fillapex. The root canals were scanned with micro-CT to evaluate the volume of root canal filling before retreatment. The samples were randomly divided into four groups according to the file system used to remove root canal filling material (n = 10): ProTaper Universal Retreatment, ProTaper NEXT, EdgeFile XR, and EdgeFile® X3 NiTi system. All the samples were scanned with a micro-CT device for the second time to evaluate the amount of residual filling material in the root canals. The percentages of filling material removed from root canals were calculated. Additionally, the time spent on the removal of the root canal filling material was recorded. The data were analyzed using the Shapiro-Wilk and Kruskal-Wallis tests. Results. There were no significant differences between the groups in the percentage of root canal filling material removal. However, a statistically significant difference was found between the groups in the time required to reach the apex and remove the entire filling material. The time required to remove the root canal filling material was higher in the EdgeFile® X3 group. Conclusion. NiTi files manufactured for root canal preparation can be used effectively and safely to remove root canal filling materials. EdgeFile XR produced for retreatment can be used as an alternative to ProTaper Universal Retreatment files. © 2021 The Author(s).
Effectiveness of Xp-Endo Finisher, Endoactivator, and Pui Agitation in the Penetration of Intracanal Medicaments Into Dentinal Tubules: a Confocal Laser Scanning Microscope Analysis
(Tabriz University of Medical Sciences, 2024) Akkol, E.; Özlek, E.
Background. This investigation assessed the impact of irrigation activation systems on the depth of penetration of intracanal medicaments into dentinal tubules. Methods. Ninety-six mandibular premolar teeth were prepared using ProTaper Next up to size X3. The teeth were randomly divided into four groups based on the final irrigation activation systems (n = 24): group 1: EndoActivator, group 2: XP-Endo Finisher, group 3: Passive ultrasonic irrigation (PUI), and group 4: control. After the final irrigation, all the samples were divided into two subgroups (n = 12): subgroup A: calcium hydroxide (Ca(OH)2) and subgroup B: modified triple antibiotic paste (mTAP). Statistical analysis involved three-way analysis of variance (ANOVA). Results. EndoActivator, XP-Endo Finisher, and PUI activation methods significantly increased the penetration of intracanal medicaments compared to conventional needle irrigation (P < 0.05). The XP-Endo Finisher group exhibited the highest penetration percentage and maximum penetration depth, showing a statistically significant difference from the EndoActivator group (P < 0.001). No significant difference was observed between XP-Endo Finisher and PUI, nor between PUI and EndoActivator (P > 0.05). mTAP showed a higher percentage of dentinal tubule penetration than Ca(OH)2, although no significant difference was found in maximum penetration depth. The coronal region demonstrated the highest penetration percentage and depth, while the apical region showed the lowest. Conclusion. This study showed the effectiveness of XP-Endo Finisher in improving the penetration of intracanal medicaments into dentinal tubules. The findings emphasize the importance of selecting appropriate irrigation activation systems to improve treatment outcomes in endodontics. By demonstrating the effectiveness of advanced systems like XP-Endo Finisher, this research supports their integration into routine clinical practice for better endodontic success. © 2024 The Author(s).
Effects of Ethylenediaminetetraacetic Acid, Citric Acid, and Etidronic Acid on Root Dentin Mineral Content and Bond Strength of a Bioceramic-Based Sealer: a Scanning Electron Microscopy-Energy Dispersive Spectroscopy Study
(Tabriz University of Medical Sciences, 2024) Taşan, A.; Özlek, E.
Background. This study assessed the impact of chelating agents, 17% ethylenediaminetetraacetic acid (EDTA), 10% citric acid (CA), and 18% etidronic acid (HEDP), on root dentin mineral content. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) was applied to analyze changes, and the push-out bond strength test was used to measure dentin adhesion of Well-Root ST, a bioceramic root canal sealer. Methods. A total of 80 extracted single-rooted lower premolar teeth were included in this study and randomly divided into four groups (n = 20): group 1 (17% EDTA), group 2 (10% CA), group 3 (18% HEDP), and group 4 (distilled water, control). After irrigation and drying, SEM-EDS was applied to analyze eight samples from each group at coronal, middle, and apical root regions for mineral content and SEM images. The remaining 12 samples underwent a push-out bond strength test using Well-Root ST sealer and gutta-percha. Kruskal-Wallis and Dunn’s tests were used for statistical analyses. Results. Statistically significant differences were found between groups (P <0.05). SEM-EDS showed significant differences in C, O, Ca, P, and Ca/P content, with no significant differences in Na and Mg. Push-out bond strength was significantly higher in the 17% EDTA, 10% CA, and 18% HEDP groups compared to the control group, with no significant differences between chelating agents. Conclusion. Chelating agents altered root dentin mineral content and improved the adhesive properties of the bioceramic sealer. These findings highlight the importance of considering the selection and use of chelating agents in the clinical practice for root canal treatment. © 2024 The Author(s).
Evaluation of Calcium Hydroxide Removal Efficiency of Different Concentrations and Forms of Sodium Hypochlorite
(Yuzuncu Yil Universitesi Tip Fakultesi, 2021) Özlek, E.; Kadı, G.
The aim of the present study was to compare different forms of sodium hypochlorite for the removal of calcium hydroxide from root canals. Sixty single-rooted mandibular premolars with single canals were prepared using ProTaper Next file up to size X3. Each root canal was filled with calcium hydroxide using #30 Lentulo (Dentsply, Mailifer, Switzerland) to the working length and stored in 100% humidity at 37 C for 7 days. Afterwards, the teeth were divided into 4 groups according to the irrigation protocol to be used for the removal of calcium hydroxide (n=10): Group 1, 2.5% NaOCI; Group 2, 5.25% NaOCI; Group 3, NaOCI gel; Group 4, Distilled water (control). Samples were split longitudinally, photos of halves were taken at 10× magnification and were analyzed using the Corel DRAW Graphics Suite X4 v14.0 (Corel Corporation. CA, USA) software to calculate the percentage of surfaces with residual calcium hydroxide. Chi-square test was used for making comparisons among the groups at a significance level of p<0.05. There were significant differences between the 2.5% NaOCI solution, 5.25% NaOCI solution, NaOCI gel and the control groups (p<0.001). Gel form of NaOCI is an appropriate and effective method for removing calcium hydroxide from the root canals. Gel form of NaOCI, whose popularity has increased in recent years, was more effective than other groups in removing calcium hydroxide from the root canal. However, none of the 2.5% NaOCl solution, 5.25% NaOCI solution and NaOCI gel were effective in removing the calcium hydroxide completely. © 2021, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
Evaluation of Root Morphology and Root Canal Configuration of Mandibular and Maxillary Premolar Teeth in Turkish Subpopulation by Using Cone Beam Computed Tomography
(Yuzuncu Yil Universitesi Tip Fakultesi, 2022) Gündüz, H.; Özlek, E.
The aim of this study was to evaluate the root morphology and root canal configuration of the lower and upper premolars using cone-beam computed tomography (CBCT), according to gender and right-left position of the tooth in the Turkish subpopulation. For the evaluation of root canal anatomy of mandibular and maxillary premolar teeth, 494 patients were used. In total, 3,880 premolar teeth were evaluated. CBCT images were examined in the coronal, sagittal, and axial planes. Number of roots, canals, and canal configurations of the teeth were determined according to Vertucci's classification. Qualitative data were analysed with Chi-square, Fisher Exact, and Bonferroni tests (α=0.05%). According to the results of this study, in maxillary first premolars, 64.5% two roots, 87.7% two canals, and 67.8% Type Ⅳ canal configuration; in maxillary second premolars 77.3% one root, 50.4% one canal, and 50.4 Type Ⅰ canal configuration; in mandibular first premolars 89.9% one root, 76.9% one canal, and 76.9% Type Ⅰ canal configuration; and in mandibular second premolars 98.4% one root, 95.9% one canal, and 95.9% Type Ⅰ canal configuration were observed. No statistically significant effect of the tooth position (right, left) on the number of roots, canals, and canal configuration in maxillary and mandibular premolars was observed (p>0.05). Maxillary second premolar and mandibular first premolars showed a statistically significant effect on number of roots, canals, and canal configuration by gender (p=0.00, p=0.032). In addition, gender had a significant effect on number of roots in maxillary first premolars (p=0.017). © 2022, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
Evaluation of the Frequency and Reasons for Requesting Cone-Beam Computed Tomography by Endodontists in Turkey
(Yuzuncu Yil Universitesi Tip Fakultesi, 2024) Gündüz, H.; Özlek, E.; Kadı, G.
This study aimed to evaluate the frequency and reasons for requesting Cone-beam computed tomography (CBCT) by endodontists in Turkey. 213 endodontists in Turkey participated in this survey research. Participants were asked 12 questions regarding their age, gender, the year since they completed their endodontic specialization or doctorate, the institution they work, their title and CBCT use cases. The descriptive statistics of the data are presented as percentages and frequencies. The chi-square test was used for pairwise comparisons (p<0.05). The rate of participants using a CBCT evaluation in their diagnosis and treatment was 77.9%. 81.7% of participants reported that the frequency of CBCT requests was less than 20% compared to the monthly total number of patients treated. 27.7% of participants indicated that the reason for requesting CBCT was to evaluate root resorption, and 36.6% indicated that they needed CBCT most frequently in the maxillary anterior region. It was determined that the majority of the participants, whose frequency of CBCT request was below 20%, did not have sufficient knowledge about CBCT. The majority of study participan ts use CBCT in their clinical practice. Although most participants have CBCT in their facility, they indicated that they do not have enough information about the use of CBCT. Most participants indicated that the frequency of CBCT use was lower than the number of cases studied. The reasons for using CBCT were complications in resorption and retreatment cases where two-dimensional imaging was inadequate for diagnosis and treatment. © 2024, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
Five-Year Follow-Up of a Delayed Reimplanted Avulsed Tooth: Case Report
(Yuzuncu Yil Universitesi Tip Fakultesi, 2018) Özlek, E.; Ak, B.; Akkol, E.
This case involves the reimplantation of an avulsed mandibular central tooth that occurred two hours after an accident. A nine-year old girl had visited nearest dental health care center complaining of an avulsed mandibular central tooth two hours after her bicycle accident. The avulsed tooth had been kept in milk in for those two hours. It was reimplanted and referred to a dentistry faculty with a composite splint. The patient presented to our clinic three days later. The non-hygienic composite splint was removed and gingivoplasty procedure was performed by a periodontologist. The new splint was applied using polythene fiber post. Clinically normal periodontal tissues were detected after two weeks, and endodontic treatment was begun. Root filling of the clinically asymptomatic tooth was performed after 30 days, and coronal restoration finished using composites. The tooth is still functional now after five years. The long-term prognosis for the replanted tooth is unclear. During this growth period, however, the height of the alveolar bone has been preserved and is aesthetically satisfying. © 2018, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.