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Öğe Comparative evaluation of apical sealing ability of different root canal sealers(ISTANBUL UNIV PRESS, ISTANBUL UNIV RECTORATE, 2018) Altan, Halenur; Göztaş, Zeynep; İnci, Gülsüm; Tosun, GülPurpose The aim of this study was to compare the short and long term apical sealing ability of different root canal sealers. Materials and methods Fifty-five extracted human anterior single-root teeth were used. The coronal part of each tooth was removed and the root canals were prepared with NiTi rotary instruments. Teeth were divided into 5 study groups; Group I: MTA Fillapex (Angelus, Brazil); Group II: Sealapex (Sybron-Kerr, Romulus, MI, USA) and Group III: AH Plus (Dentsply, Konstanz, Germany) (n=15) and negative and positive control groups (n=5). The quality of root canal sealing was assessed by a fluid filtration method performed at 24 h and 180-day time intervals. Kruskal Wallis and Mann Whitney U tests were used to compare the groups. Results At 24 h evaluation, MTA Fillapex presented significantly less microleakage than the Sealapex and AH Plus (p<0.05). At long term interval (180-day), Sealapex and AH Plus presented significantly less microleakage than the MTA Fillapex (p<0.05). Conclusion Sealapex and AH Plus showed significantly better sealing abilities than MTA Fillapex in the long term.Öğe Effects of different accelerators on the setting time and physo-chemical properties of mineral trioxide aggregate(BIOINTERFACE RESEARCH APPLIED CHEMISTRY, 2016) Altan, Halenur; Tosun, Gul; Kus, MahmutThis study aimed to evaluate the effects of different accelarators added to Mineral Trioxide Aggregate (MTA) liquid on the final setting time, push-out bond strength as well as the physicochemical properties of MTA using SEM analysis.Öğe Evaluation of temperature changes in the pulpal chamber of the primary tooth during curing of colored compomers(Cumhuriyet University Faculty of Dentistry, 2018) Altan, Halenur; Goztas, Zeynep; Tosun, Gül; Sari, TuğrulPurpose: To investigate the temperature changes in the primary teeth pulp chambers during the curing of different colored compomers Materials and Methods: Class II cavities were prepared in primary mandibular second molars (n=5). Gold, blue, green, berry, and tooth (control group) colored compomers were tested in two steps (aproximal and occlusal). Measurement of pulp chamber temperature changes during curing was performed with a J type thermocouple. The data including differences between the highest and initial temperature values were recorded and analyzed by two-way ANOVA and Mann-Whitney U tests Results: There were statistically significant differences temperature changes in groups (p < 0.05). Cümle yeniden kurulabilir. Gold colored compomer Demonstrate the highest temperature increase in both proximal and occlusal surfaces. Tooth colored compomer (A2) Demonstrate the lower temperature increase. The temperature increase in aproximal cavities was found higher than the temperature increase in occlusal cavities. Conclusions: Colored compomer can be an alternative restorative materials in superficial class I and II cavities in primary teeth. Dark coloured compomers should be used in deep cavities. Running Title: Temperature Changes During Curing of Colored Compomers. © 2018 Cumhuriyet University Faculty of Dentistry.Öğe Idiopathic Juvenile Osteoporosis: A Case Report(PREMCHAND SHANTIDEVI RESEARCH FOUNDATION, 2015) Altan, Halenur; Tosun, Gul; Sen, YasarIdiopathic Juvenile Osteoporosis (IJO) is a very rare disease, self restrictive and shows marked, spontaneous improvement during adolescence. The major clinical features were pain with difficulty walking, growth retardation, oral and dental abnormalities with radiographically porous bone structure. A 13-year-old male referred to paediatric dentistry clinic for toothache. The observations made with extra-intraoral clinic examination that one revealed short and skinny stature, diffuse caries in deciduous teeth, abraded lower incisor, deep bite and dysmorphic appearance in permanent incisor. This report emphasizes the recognized features of IJO as well as describes facio-dental findings that could aid in the diagnosis and management of these patients.Öğe Inhibition effects of different toothpastes on demineralisation of incipient enamel lesions(QUINTESSENCE PUBLISHING CO INC, 2019) Altan, Halenur; Göztaş, Zeynep; Kahraman, Kamil; Kuş, Mahmut; Tosun, GülPurpose: To evaluate the inhibitory effects of different toothpastes on demineralisation of incipient enamel lesions using a toothbrush simulator. Materials and Methods: Fifty enamel specimens were prepared from extracted human molars. The specimens were randomly assigned to the following groups (n = 10/group): 1. no treatment (control); 2. toothpaste containing arginine (ProRelief, Colgate;); 3. fluoride toothpaste (Pronamel, Sensodyne GlaxoSmithKlein); 4. tooth mousse containing casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) (Recaldent, GC); 5. toothpaste (Restore, Dr. Collins) containing bioactive glass (NovaMin, GlaxoSmithKlein). All specimens were exposed to pH cycling. The remineralising agents were applied to the samples with a toothbrush simulator for 2 min twice a day for five days. The weight percentage of mineral changes for the elements calcium (Ca), phosphorus (P), sodium (Na) and silica (Si) were measured by SEM energy-dispersive x-ray spectroscopy (SEM-EDX). SEM revealed properties of treated enamel surfaces. The data were analysed using one-way ANOVA. Results: Statistically significantly higher levels of Ca and P were found in all groups compared to the control (p < 0.05). Conclusions: The toothpastes' efficacy of inhibiting demineralisation depended on the active ingredients in the respective toothpaste. The demineralisation inhibition efficacy of the tested toothpastes depended on the active ingredients in the toothpaste.Öğe THE SETTING MECHANISM OF MINERAL TRIOXIDE AGGREGATE(ISTANBUL UNIV PRESS, ISTANBUL UNIV RECTORATE, 2016) Altan, Halenur; Tosun, GulMineral trioxide aggregate (MTA) is a powder containing calcium silicate composed of hydrophilic particles which harden at the presence of moisture. MTA was initially introduced as a root end filling material. Due its practical advantages that include superior biocompatility, effective sealing capability, and the ability to improve regeneration of the pulp and peripheral root tissues, it is used in different clinical applications such as pulp capping, apexification, pulpotomy and perforation. Despite being a promising material in endodontic treatment, MTA is not commonly used. Long setting time is the main clinical disadvantage of MTA. The aim of this review is to provide an overview of the current literature concerning the setting mechanism of MTA, accelerators and devices used to evaluate various steps of the hardening process.
