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Öğe A case report of immediate autotransplanted teeth: 2-year follow-up(Bayrakol Medical Publisher, 2022) Yildiz, Tugcenur; Koc, Busra; Mavi, Esra; Zan, RecaiAutotransplantation is the removal of tissue or an organ from an area of a living being's body and its transplantation to another area in the same body. Autotransplantation plays a key role in replacing missing teeth of young patients since this procedure has many advantages compared to fixed prosthesis and implant applications in individuals of developmental age. General indications for autotransplantation are periodontal causes and tooth loss that cannot be restored due to caries or trauma. On the other hand, external root resorption and dentoalveolar ankylosis are the most common complications of auto -transplantation. Autotransplantation is a treatment method that can result in a high success rate when attention is paid to the necessary prognostic factors.Öğe Antibacterial Effect of Gaseous and Aqueous Ozone in Root Canals Infected by Enterococcus Faecalis(TAYLOR & FRANCIS INC, 2014) Zan, Recai; Hubbezoglu, Ihsan; Sumer, Zeynep; Tunc, TutkuThe present study evaluated the antibacterial effects of aqueous and gaseous ozone in human root canals infected with Enterococcus faecalis. Infected root canals were divided into two control groups (saline, sodium hypochlorite) and three experimental groups (manual or ultrasonic technique of aqueous and, gaseous ozone). Disinfection procedures were performed, remaining microbial colonies were counted and data were evaluated. Sodium hypochlorite showed the highest antibacterial effect on root canals infected with Enteroccous faecalis. Moreover, aqueous ozone with ultrasonic technique appear to be more influential than aqueous ozone with manual technique and gaseous ozone.Öğe Antibacterial Effects of Two Different Types of Laser and Aqueous Ozone Against Enterococcus faecalis in Root Canals(MARY ANN LIEBERT, INC, 2013) Zan, Recai; Hubbezoglu, Ihsan; Sumer, Zeynep; Tunc, Tutku; Tanalp, JaleObjective: The purpose of this study was to investigate the antibacterial effects of two different types of laser and aqueous ozone in human root canals infected by Enterococcus faecalis. Background data: Many techniques have been developed to find an alternative to sodium hypochlorite as a disinfection agent for infected root canals. However, no study has evaluated the exactly the same antimicrobial agent with sodium hypochlorite (NaOCl). Methods: Eighty mandibular premolar teeth with single roots and canals were selected. Following root canal preparation and irrigation, sterilization was performed in an autoclave. E. faecalis was incubated in the root canals and kept at 37 degrees C for 24 h. The teeth contaminated with E. faecalis were divided into one negative control group (NaOCl) and three experimental groups; (Er: YAG laser, KTP laser, and aqueous ozone groups)(n = 20). A disinfection procedure was performed for 3 min in order to standardize all groups. After this procedure, the microbial colonies were counted. Results: The results indicated that whereas the NaOCl group exhibited the highest antibacterial effect among all groups, the aqueous ozone showed the highest antibacterial effect among the experimental groups. Whereas a statistically significant difference was noted between the aqueous ozone and laser groups (p < 0.05), the difference between the Er: YAG and KTP lasers was not statistically significant (p > 0.05). Conclusions: The results showed that when aqueous ozone was applied with the aim of disinfecting the root canals, it exhibited a higher antibacterial effect than the KTP and Er: YAG lasers. However, the antibacterial effect of the aqueous ozone was insufficient when compared with NaOCl.Öğe Antibacterial Efficacy of Aqueous Ozone in Root Canals Infected by Enterococcus faecalis(AHVAZ JUNDISHAPUR UNIV MED SCI, 2014) Hubbezoglu, Ihsan; Zan, Recai; Tunc, Tutku; Sumer, ZeynepBackground: In endodontics, the elimination of resistant bacteria such as Enterococcus faecalis plays an important role for treatment success in root canals. Therefore, new alternative irrigants (instead of sodium hypochlorite) have been researched to achieve ideal endodontic treatment. Objectives: The aim of the present study was to evaluate and to compare the antibacterial effect of aqueous ozone with different concentrations and techniques of application (manual and ultrasonic) against E. faecalis in human root canals. Patients and Methods: Eighty single-root mandibular premolar teeth were selected, prepared and sterilized. E. faecalis was incubated in the root canals and kept at 37 degrees C for 24 h. The teeth were divided into four main groups each has 20 members: NaOCl (positive control) group; 8 ppm aqueous ozone group; 12 ppm aqueous ozone group; and 16 ppm aqueous ozone group. While half of the specimens were disinfected with aqueous ozone by manual technique, the other half was disinfected with the aqueous ozone by ultrasonic technique. Conventional irrigation technique was simultaneously applied with ultrasonic vibration that was produced by VDW. ULTRA device. The disinfection procedures were performed for 180 s to ensure standardization of all the working groups. Paper points (placed in the root canals before and after the disinfection procedures) were transferred to Eppendorf tubes containing 0.5 mL of brain heart infusion broth. Then, 50 mu L of the suspension was inoculated onto broth agar media. Microbial colonies were counted, and the data were evaluated statistically using 2-way analysis of variance (ANOVA) and Tukey tests. Results: Although the antibacterial effect of 16 ppm aqueous ozone using a manual technique had an insufficient effect, its ultrasonic application technique resulted in complete disinfection in the root canals. Conclusions: The bactericidal activity of high concentration of aqueous ozone combined with ultrasonic application technique showed efficacy similar to that of 5.25% NaOCl in root canals.Öğe Antibacterial Efficacy of Super-Oxidized Water on Enterococcus faecalis Biofilms in Root Canal(AHVAZ JUNDISHAPUR UNIV MED SCI, 2016) Zan, Recai; Alacam, Tayfun; Hubbezoglu, Ihsan; Tunc, Tutku; Sumer, Zeynep; Alici, OguzhanBackground: The success of endodontic treatment depends on a few crucial factors. One of these factors is the complete chemo-mechanic preparation of root canal against various bacteria. In particular, the effect of resistant bacteria may cause intense pain with flare-up and formation of periapical lesions. Therefore, the strong effect of irrigants plays an important role in terms of the complete elimination of these bacteria to achieve long-term successful treatment. Objectives: The aim of this study was to investigate the antibacterial effects of super-oxidized water (SPO) in root canals infected with Enterococcus faecalis biofilms. Methods: One hundred twenty single-root, premolar teeth were selected. Initially, the teeth were prepared and then disinfected. E. faecalis were inoculated and kept at 37 degrees C for 24 hours in the root canals. The re-inoculation procedure was repeated on the first, fourth, seventh, and tenth days. The infected root canals were divided into one negative (saline) and one positive (sodium hypochlorite) control group and four experimental groups (super-oxidized water: 1, 2, 3, or 5 minutes) (n = 20). Paper points were placed in the root canals to control and evaluate the biofilm formation. Biofilms were counted on blood agar plates, and data was evaluated and statistically analyzed using one-way ANOVA and Tukey's test. Results: Although sodium hypochlorite (NaOCl) showed no statistically significant difference when compared with three and five minutes of SPO irrigation (P > 0.05), NaOCl showed statistically significant differences among all other groups (P < 0.05). Conclusions: Super-oxidized water indicated a remarkable and similar bactericidal effect to that of traditional NaOCl against E. faecalis biofilms. In terms of successful endodontic treatment approaches, super-oxidized water may be used as an effective irrigation solution in clinics.Öğe Antibiofilm Effect of Different Irrigation Solutions Activated with KTP Laser(Cumhuriyet University Faculty of Dentistry, 2022) Elmalı, Zuhal; Zan, RecaiObjectives: The aim of this study was to evaluate the antimicrobial efficacy of Potassium Titanium Phosphate (KTP) laser-activated irrigation solutions on intraradicular Enterococcus faecalis biofilms in in-vitro conditions by using a scanning electron microscope. Materials and Methods: 120 single-root, single canal permanent mandibular premolar human teeth were used. Sterilization and disinfection of the teeth were performed. Enterococcus faecalis biofilms were obtained after 4 weeks by re-inoculation procedures. Each group was divided into 6 groups consisting of 20 roots and root canal disinfection protocols were applied using irrigation solutions with 5.25% NaOCl, saline, super-oxidized water solution, 8 ppm ozonated water, 2% CHX, 17% EDTA, all activated by KTP laser. It was smear-planted to a solid medium which split as before and after the disinfection applications for the aim of Counting Microorganism colonies from root canals and data were evaluated statistically. In this statistical evaluation one way ANOVA and Tukey tests were used. Before and after the irrigation procedures for the presence and elimination of biofilm the root canals were processed for scanning electron microscopy and biofilm was examined on the standard images. Results: As a result of the statistical comparison performed among all groups, while NaOCl ensures the highest amount of elimination as a positive control group, the lowest amount of bacterial elimination was detected in the saline group that applied as the negative control group (p<0.05). None of the experimental groups achieved the whole elimination of Enterococcus faecalis biofilm. While there was no statistically significant difference between super-oxidized water and aqueous ozone groups that indicated the strongest antibiofilm effect (p>0.05), EDTA showed the lowest antibiofilm effect (p<0.05). Conclusions: The use of 5.25% NaOCl solution activated by KTP laser, which shows the highest antibiofilm efficiency among the study groups, in clinical applications is very effective in terms of biofilm elimination in root canal treatments and is especially promising in the success of long-follow-up treatments. However, the KTP laser activation procedures of super-oxidized water solution and 8 ppm ozonated water may be insufficient as a safe disinfection method © This work is licensed under Creative Commons Attribution 4.0 International LicenseÖğe Antifungal Efficacy of Aqueous and Gaseous Ozone in Root Canals Infected by Candida albicans(AHVAZ JUNDISHAPUR UNIV MED SCI, 2013) Hubbezoglu, Ihsan; Zan, Recai; Tunc, Tutku; Sumer, Zeynep; Hurmuzlu, FeridunBackground: Candida albicans is one of the important microorganism which can be isolated from normal flora in the mouth. The resistance of C. albicans against disinfectants like ozone can reduce success rate of root canal treatments. Objectives: The current study aimed to investigate the antifungal efficacy of aqueous and gaseous ozone in human root canals infected by C. albicans. Materials and Methods: Fifty single-root mandibular premolar teeth were selected. The teeth were prepared and sterilized. C. albicans were incubated in root canals and kept at 37 degrees C for 24 h. The teeth were divided into one positive, one negative control, and three experimental groups (n = 10). Group 1, saline (positive control); Group 2, sodium hypochlorite (NaOCl) (negative control); Group 3, aqueous ozone with manual technique (4 mg/L); Group 4, aqueous ozone with ultrasonic technique (4 mg/L) and Group 5, gaseous ozone. Disinfection procedures were performed during 300 s to ensure standardization among all the working groups. Paper points, placed in the root canals before and after disinfection procedures, were transferred in Eppendorf tubes containing 0.5 ml of brain heart infusion broth. Then 50-mu L suspension was inoculated onto Sabouraud dextrose agar. Microbial colonies were counted and data were evaluated statistically with using one-way ANOVA and Tukey's tests. Results: A statistically significant difference was found between antifungal activities of gaseous ozone group and NaOCl group (P < 0.05). Additionally, although no statistically significant differences were found among aqueous ozone groups (manual and ultrasonic techniques) and the NaOCl group (P > 0.05), few fungi were found in the aqueous ozone with manual technique group. Conclusions: When gaseous ozone was used alone in root canals, its antifungal effect was not sufficient. However, applying aqueous ozone with ultrasonic technique showed stronger antifungal effects than aqueous ozone with manual technique in root canals.Öğe Apical extrusion of intracanal biofilm using ProTaper gold, wave one gold,twisted file adaptive, oneshape new generation and K3XF(Kare Publishing, 2016) Zan, Recai; Tunç, Tutku; Hubbezoglu, İhsan; Sümer, ZeynepObjective: To evaluate the bacterial extrusion during instrumentation with different nickel titanium (NiTi) engine-driven instruments. Methods: Ninety extracted single-canal human mandibular incisor teeth were inoculated with Enterococcus faecalis to obtain biofilm formation and were randomly divided to 6 groups (n=15). One group served as the control and was not instrumented; the other groups were prepared with ProTaper Gold (PTG; Dentsply Maillefer, Ballaigues, Switzerland), WaveOne Gold (WOG; Dentsply Maillefer), Twisted File Adaptive (TFA; SybronEndo, Orange, CA, USA), One Shape New Generation (OSNG; MicroMega, Besancon, France), and K3XF (SybronEndo) instruments. Bacteria extruded beyond the apical foramen were quantified in colony-forming units per milliliter. The number of colony-forming units in the remaining biofilm was determined for each sample. Data were analyzed using the one-way analysis of variance (ANOVA) and Tukey post-hoc tests. Results: All NiTi instruments resulted in different quantities of bacterial extrusion. The TFA group caused most bacterial extrusion (p<0.05). The PTG and WOG groups caused less bacterial extrusion than the OSNG and K3XF groups (p<0.05), but there was no statistically significant difference between the PTG and WOG groups (p>0.05). Conclusion: PTG and WOG are preferable system in terms of successful endodontic treatments. The amount of bacterial extrusion is associated with the metallurgy and design of the instrument used. © 2016 Kare Publishing. All rights reserved.Öğe Assessment of dentinal tubule penetration of AH plus, MTA Fillapex and Sealapex after various disinfection procedures: A confocal laser scanning microscopic study(AVES, 2023) Zan, Recai; Akpinar, Kerem Engin; Topçuoğlu, Hüseyin Sinan; Hubbezoğlu, Ihsan; Demir, Arzu ŞeymaObjective: The aim of this study is to evaluate and compare dentinal tubule penetration of various root canal sealers obturated after the application of different irrigation activation procedures by a laser scanning confocal microscope. Methods: A total of 150 extracted human permanent mandibular premolar single-rooted teeth were selected and randomly divided into 3 main groups according to the sealer type (n = 50) as AH Plus, MTA Fillapex, and Sealapex. Each main group was randomly subdivided into 5 subgroups according to the irrigation activation protocols (n = 10): Potassium–titanyl–phosphate laser irradiation, conventional needle, intra-kit, sonic irrigation, and ultrasonic irrigation procedures. After the activation procedures, the root canals were obturated with AH Plus, MTA Fillapex, and Sealapex mixed with 0.1% fluorescent rhodamine B isothiocyanate. Specimens were sectioned at 3, 6, and 9 mm from the apex. All sections were examined under a confocal laser scanning microscope to calculate the dentinal tubule penetration area. Results: Data were analyzed using a 3-way analysis of variance and Tukey’s post hoc tests (P =.05). Sealapex indicated a statistically lesser penetration than the other group (P <.05), MTA Fillapex ensured deeper penetration than AH Plus (P <.05). Ultrasonic irrigation provided sig-nificantly deeper penetration than other activation procedures (P <.05). The statistically high-est percentage and the maximum depth of sealer penetration were shown in coronal third for all groups (P <.05). Conclusion: The selection of root canal sealer, irrigation activation procedures, and root canal region plays a crucial role on the dentinal tubule penetration. AH Plus and MTA Fillapex applied with ultrasonic irrigation could achieve deeper sealer penetration in dentinal tubules. © 2023, AVES. All rights reserved.Öğe Comparative Evaluation of the Effect of Different Rotary Instrument Systems on the Amount of Apically Extruded Debris(Cumhuriyet University Faculty of Dentistry, 2022) Ünal, Bilge; Zan, RecaiObjectives: The purpose of our study is to examine in vitro the amount of debris extrusion from the apical after root canal preparation with different rotary instruments. Materials and Methods: In the present study, 60 single roots single-canal lower premolar human teeth were used. The teeth were randomly selected and divided into 4 main groups (n=15). Root canals are shaped by using 2Shape, One Curve, and XP-3DEndo Shaper working in rotational motion and WaveOne Gold working in reciprocal motion. Later, the weight of each eppendorf tube was weighed on a precision scale and the amount of debris extrusion from the apical was determined with 10?4 precision by subtracting the empty weight of the tube. Since the parametric test assumptions were fulfilled in the evaluation of the data obtained regarding the amount of debris extrusion from the apical of file systems by loading them into the SPSS 22.0 program, One-Way Variance analysis was used and the level of error was taken as 0.05. Results: When the amount of debris extrusion from the apical is ordered from high to low, it was seen that there are 2Shape, One Curve, XP-Endo Shaper, and WaveOne Gold. However, the difference between study groups was not statistically significant. Conclusions: Considering the results obtained in terms of debris extrusion from the apical about the new generation files with different metallurgy, kinematics, structural features, designs, and different configurations that we used in the present study, it was seen that these systems would not show any difference in terms of the effect of debris on the success of endodontic treatment © This work is licensed under Creative Commons Attribution 4.0 International LicenseÖğe Contemporary Endodontic Obturation Techniques: A Comprehensive Literature Review(Cumhuriyet University Faculty of Dentistry, 2021) Zan, Recai; Demir, Arzu SeymaThe success of an endodontic treatment is excessively depends on obturation as well as chemomechanical shaping. Hence, achiving a homogenious, impermeable and gap-free obturation plays a crucial role in endodontic treatment success. Today, many materials and techniques have been developed for endodontic purpose such as those which applied with heat or vibration, those softened with non-toxic chemicals and those uses ultrasound energy. Some of these techniques are still preferred by proffessionals when some are abandoned. However, gutta-percha is the most used material either with or without sealer. Gutta-percha can be applied with cold or warm techniques. It’s known that warm gutta-percha technique leads a more homogenious obturation than cold techniques. Nevertheless, different obturation methods are convenient for different anatomic variations of root canal system. This review article summerize the contemporary and conventional obturation techniques with evaluation of their current status in endodontic implementation. © 2021,Cumhuriyet Dental Journal.All Rights ReservedÖğe CONTEMPORARY ENDODONTIC OBTURATION TECHNIQUES: A COMPREHENSIVE LITERATURE REVIEW(Sivas Cumhuriyet University, 2021) Zan, Recai; Demir, Arzu ŞeymaThe success of an endodontic treatment is excessively depends on obturation as well as irrigation. Hence, achiving a homogenious, impermeable and gap-free obturation plays a crucial role in endodontic treatment. Today, many materials and techniques have been developed for endodontic purpose such as those which applied with heat or vibration, those softened with non-toxic chemicals and those uses ultrasound energy. Some of these techniques are still preferred by proffessionals when some are abandoned. However, gutta-percha is the most used material either with or without sealer. Gutta-percha can be applied with cold or warm techniques. It’s known that warm gutta-percha technique leads a more homogenious obturation than cold techniques. Nevertheless, different obturation methods are convenient for different anatomic variations of root canal system. This review article summerize the contemporary and conventional obturation techniques with evaluation of their current status in endodontic implementation.Öğe Effect of acid etching and different Er:YAG laser procedures on microleakage of three different fissure sealants in primary teeth after aging(JAPANESE SOC DENTAL MATERIALS DEVICES, 2013) Unal, Murat; Hubbezoglu, Ihsan; Zan, Recai; Kapdan, Arife; Hurmuzlu, FeridunThe purpose of this study was to evaluate the effects of different surface conditioning procedures on microleakage and unfilled area proportions of three fissure sealants(Aegis, Helioseal and Helioseal F) in primary molar teeth. One hundred and fifty teeth were randomly divided into five main groups according to surface conditioning procedures. Main groups were; acid-etching(Group A); laser 3.75 W(Group B) and 5 W(Group D); acid-etching combined with laser 3.75 W(Group C) and 5 W(Group E). Samples were aged by thermocycling and water bath. Afterwards, they were immersed in basic fuchsin solution for 24 h and bucco-lingual sections were obtained from each tooth. Digital images were taken using a stereo-microscope and the microleakage and unfilled area proportions were assessed by using a software system. Consequently, Aegis FS containing amorphous calcium phosphate was found to exhibit the lowest microleakage in all surface conditioning procedures. Unfilled areas were not detected in Groups C and E of all FSs.Öğe Effect of different laser types on bonding strength of CAD/CAM-customized zirconia post to root canal dentin: an experimental study(Springer London Ltd, 2020) Ulgey, Melih; Zan, Recai; Hubbezoglu, Ihsan; Gorler, Oguzhan; Uysalcan, Gozde; Cotur, FatosIn clinical dentistry, the strength of bonding zirconia posts to root canal dentinal walls currently needs enhancement, and laser application can be an important contribution owing to its features that accommodate adjustable modifications on dental materials. Herein, the effect of different laser treatments applied to dentin surfaces on the strength of bonding zirconia posts to root canal dentinal walls is evaluated by using the pull-out bond strength test in a laboratory setting. A total of 40 single-rooted permanent mandibular premolar teeth that were freshly extracted were used here. The root canal preparation steps were performed using the crown-down technique. Custom-made zirconia posts were produced using CAD/CAM technology. Prior to the application of resin cement, the internal surfaces of the root canals were irradiated using Nd:YAG, Er:YAG, and KTP lasers. Pull-out tests were performed on each specimen by using a universal testing machine. One-way analysis of variance and Tukey post hoc tests were used to compare the pull-out bond strength data. The bond strengths of the laser-treated specimens were greater than those of the untreated controls (p < 0.05). While the value of the pull-out bond strength after Nd:YAG laser treatment was significantly higher than the values obtained after the applications of the Er:YAG and KTP lasers (p < 0.05), the pull-out bond strength after Er:YAG laser treatment was considerably greater than that after KTP laser treatment (p < 0.05). The bond strength between the root canal dentin and the CAD/CAM custom-made zirconia post was improved upon using all the laser modalities in current laboratory settings, among which, application of the Nd:YAG laser was the most successful.Öğe The effect of Er:YAG laser and different surface conditioning procedures on microtensile bond strength of the fissure sealant containing amorphous calcium phosphate after artificial aging(JAPANESE SOC DENTAL MATERIALS DEVICES, 2014) Unal, Murat; Hubbezoglu, Ihsan; Zan, Recai; Oznurhan, FatihThe present study aimed to compare post-aging microtensile values of fissure sealant(FS) containing amorphous calcium phosphate(ACP) with or without bonding after various enamel-etching methods. The buccal enamel surfaces of teeth were prepared and divided into five main group according to enamel etching (Group 1; acid-etching, Group 2; air-abrasion, Group 3; 2W, Group 4; 3W, and Group 5; 4W of Er:YAG laser). Each main group was subdivided as with(Subgroup B) or without(Subgroup A) a bonding system. We applied FS-containing ACP to etched enamel surfaces. All specimens were aged by Thermocycling and water bath. We then measured microtensile bond strengths and analyzed data with two-way ANOVA and Tukey's tests. We found a statistically significant difference between Group 1 and Group 2, between Subgroup B of Group 5 and Subgroups B of all other groups, and between Subgroups A and Subgroups B of all main groups (p<0.01). Er:YAG laser-etching may be an alternative enamel etching method to acid-etching for ACP-containing FS.Öğe The Effects of Er:YAG, Nd:YAG, and Ho:YAG Laser Surface Treatments to Acrylic Resin Denture Bases on the Tensile Bond Strength of Silicone-Based Resilient Liners(MARY ANN LIEBERT, INC, 2015) Gorler, Oguzhan; Dogan, Derya Ozdemir; Ulgey, Melih; Goze, Aysegul; Hubbezoglu, Ihsan; Zan, Recai; Ozdemir, Ali KemalObjective: The present study was to assess the effect of surface treatments of Er:YAG, Nd:YAG, and Ho:YAG lasers on the tensile bond strength of a silicone-based resilient liner to an acrylic denture in an in vitro setting. Methods: Experimental dumbbell-shaped specimens (75mm) were produced by combining two acrylate pieces fabricated from heat-polymerized acrylic resin (36mm) with 3mm of Molloplast((R))-B filling between them. The specimens (n=200) were randomly divided in half for thermocycling, and each 100 specimen set was randomized into five groups (n=20) with different surface treatments: control (no surface treatment), sandblasting, Er:YAG laser, Nd:YAG laser, and Ho:YAG laser. A tensile bond strength test was performed. The effect of the laser surface treatments was examined with scanning electron microscopy. Results: Only the Er:YAG laser increased the tensile bond strength compared with the other treatments. The other laser groups showed lower bond strengths. The Ho:YAG laser resulted in considerably reduced tensile bond strength. The scanning electron microscopy images showed that applying laser surface treatments modified the surface of the denture base resin. Conclusions: There was not an overall improvement with the use of the studied laser modalities in the adhesion quality of resilient denture liner to acrylic resin, although Er:YAG laser showed a potential to improve their adhesion. These laser modalities need to be subjected to further studies to determine optimal setup for use in prosthodontics.Öğe Evaluation of temperature rises during the application of different power levels of potassium titanyl phosphate and neodymium-doped:yttrium aluminum garnet lasers to external primary root canals(ELSEVIER TAIWAN, 2016) Zan, Recai; Hubbezoglu, Ihsan; Unal, MuratBackground/purpose: Nowadays, laser systems play crucial roles in endodontic treatments. Therefore, these systems should be investigated in terms of parameters that may prevent periodontal tissues damages during laser irradiation. In this context, the purpose of this study was to evaluate temperature rises during the application of different power levels of potassium titanyl phosphate (KTP) and neodymium-doped:yttrium aluminum garnet (Nd:YAG) lasers to external primary root canals. Materials and methods: Sixty primary mandibular molars were selected and chemomechanical preparation was performed. KTP laser treatment was applied to 30 of these 60 samples and the remaining 30 received Nd:YAG laser treatment. The teeth samples received laser application (KTP or Nd:YAG) at three different power levels (1 W, 1.5 W, and 2 W, respectively, applied to 10 samples from each group). Nine holes were drilled (1 mm in diameter) through the level of the coronal, middle, and apical third of each tooth canal to provide entry for a Type L thermocouple wire, which was used to measure temperature changes. Data were assessed with two-way analysis of variance and the Tukey test. Results: All power levels indicated statistically significant differences between Nd:YAG and KTP laser systems (P < 0.05). Moreover, the same regional (apical, middle, and coronal) comparisons performed between Nd:YAG and KTP laser systems showed statistically significant differences (P < 0.05). Conclusion: All parameters of KTP laser indicated lower temperature rises than Nd:YAG laser. Therefore, KTP laser may be preferable to protect the periodontal tissues from harmful thermal effects during the endodontic treatment of primary root canals. Copyright (C) 2016, Association for Dental Sciences of the Republic of China. Published by Elsevier Taiwan LLC.Öğe Evaluation of the apical leakage amount of three different root canal filling techniques by dye penetration method(Gulhane Medical School, University of Health Sciences, 2012) Altunbaş, Demet; Kaya, Betül; Arslan, Dilara; Zan, Recai; Kuştarci, Alper; Akpinar, Kerem EnginThe purpose of this study was to evaluate the apical leakage amount of the root canals filled with Thermafil technique, thermoplasticized injectable gutta-percha technique and lateral condensation technique by dye penetration method. In the study, 45 extracted human maxillary incisor teeth were used. After root canal cleaning and shaping, the teeth were divided into three groups of 15 teeth in each according to the technique of root canal filling: Group 1; lateral condensation technique, Group 2; Thermafil technique and Group 3; thermoplasticised injectable gutta-percha technique. After filling the roots, the root surfaces were coated with a double layer of nail varnish, except for the 2 mm part of the apical area, and immersed in Indian ink for 15 days. Dye penetration at the apical level was assessed with the clearing technique. Results of the study were evaluated statistically by using Kruskal-Wallis and Mann-Whitney U tests. There were no statistically significant differences between Group 1 and Group 3, and Group 2 and Group 3 (p>0.05), while a statistically significant difference was found between Group 1 and Group 2 (p<0.05). The mean apical leakage values were, from lower to higher, Group 2, Group 3 and Group 1, respectively. In conclusion the least leakage was observed with Thermafil technique with the use of dye penetration method. Therefore Thermafil technique can be regarded as an efficient filling system in achieving a successful endodontic therapy. © Gülhane Askeri Ti{dotless}p Akademisi 2012.Öğe EXTERNAL CERVICAL ROOT RESORPTION: A CASE REPORT(Istanbul Aydin University, 2024) Albayrak, Fatoş; Akpınar, Aysun; Akpınar, Kerem Engin; Zan, RecaiCervical root resorption is the most difficult type of external resorption to diagnose. Recently, cone-beam computed tomography (CBCT) has been used in the accurate diagnosis and treatment of external cervical root resorptions. This case report aims to describe the treatment of the maxillary left incisor diagnosed with external cervical root resorption by CBCT with a multidisciplinary approach. A 49-year-old female patient presented to our clinic with a complaint of pain in her maxillary left incisor. In the clinical examination, discoloration was observed in the cervical margin region of the maxillary left incisor. In the periapical radiograph, a radiolucent area was detected at the cemento-enamel junction of the relevant tooth, and the diagnosis of external cervical root resorption was confirmed as a result of the CBCT examination. After the endodontic treatment of the relevant tooth was completed, the resorptive defect was exposed by periodontal surgery. MTA was placed in the defect area. After 12 months of follow-up, the relevant tooth was found to be asymptomatic. Periapical tissues were observed in their normal appearance on the radiograph. Early and accurate diagnosis of external cervical root resorption is effective in the management of treatment. CBCT is seen as a very helpful diagnostic device for dentists in the evaluation of resorptive defects.Öğe Farklı kanal şekillendirme sistemlerinin kök dentin kırılma dayanımı üzerine etkileri(2022) Zan, Recai; Gürsu, EdaBu çalışmanın amacı, kök kanal şekillendirilmesi sırasında kullanılan ProTaper Next, WaveOne Gold ve One Shape New Generation döner alet sistemlerinin kök dentin kırılma direnci üzerindeki etkilerini incelemektir. Seksen adet çekilmiş insan alt premolar dişi rastgele 4 gruba ayrıldı (n=20). Kök kanalları el aletleri, OSNG, PTN ve WOG rotary sistemleri ile enstrümante edildi. Elements Free Obturasyon sistemi ile doldurulan kök kanallarına üniversal test cihazı ile 1 mm/dk kuvvet uygulandı. Kırık oluşumuna uygulanan maksimum kuvvet Newton cinsinden ayrı ayrı kaydedilmiştir. WOG ile OSNG grupları arasında istatistiksel olarak anlamlı bir fark bulunmamıştır (P>.05). PTN grubu, OSNG ve WOG gruplarıyla karşılaştırıldığında istatistiksel olarak daha düşük kök dentin kırılma direnci değerleri gösterdi (P<.05). Kök dentin direnci ile ilgili olarak, WOG sistemi kök kanal tedavileri sırasında kök dentin kırılma direnci açısından daha güvenli bir sistem olarak tercih edilebilir.
