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Öğe Antibacterial efficacy and remineralization capacity of glycyrrhizic acid added casein phosphopeptide-amorphous calcium phosphate(Wiley, 2020) Sahin, Feride; Oznurhan, FatihThe aim was to evaluate remineralization capacity and antibacterial efficiency of Tooth Mousse and various amounts of glycyrrhizic acid added Tooth Mousse on primary tooth enamel. Three groups were formed; Group 1 (CPP-ACP), Group 2 (CPP-ACP + 5% glycyrrhizic acid), and Group 3 (CPP-ACP + 10% glycyrrhizic acid) in order to evaluate remineralization capacity. Enamel samples were immersed in demineralization solution and then remineralization agents were applied. Surface microhardness and SEM analyses were performed at the beginning, after demineralization and remineralization. For antibacterial tests, four groups were formed; Group 1, Group 2 and Group 3 and Group 4 (control). Biofilms were then exposed to 10% sucrose eight times per day for 7 days. After biofilm growth period, samples were treated with materials to evaluate antibacterial efficiency except control group. After application of materials, samples were incubated 2 more days at 37 degrees C and at the end of this period, absorbance values of biofilms were determined and data were analyzed. An increase in microhardness values was Group 2 > Group 3 > Group 1, respectively, but there were no significant differences. After remineralization, microhardness values showed significant increases when compared to demineralized groups, but there was no significant difference. All groups showed decreased absorbance value of biofilm when compared with control group but they were insignificant. It was observed that both in Group 2 and Group 3, glycyrrhizic acid did not have a negative effect on remineralization and although they have an increase, it was insignificant. Although glycyrrhizic acid added CPP-ACP groups showed increased antibacterial activity, they were not statistically significant.Öğe Antimicrobial Efficacy of Chlorhexidine and Licorice Mouthwashes in Children(GALENOS YAYINCILIK, 2019) Oznurhan, Fatih; Buldur, Burak; Carti, Ozgul; Tutar, Ugur; Celik, Cem; Hepokur, CeylanObjective: The aim of this in vivo study is to evaluate the effectiveness of a simple herbal caries-prevention protocol for reducing salivary Streptococcus mutans levels in children. Materials and Methods: A total of 90 individuals were recruited randomly divided into three groups (n=30). Mouthwashes including chlorhexidine CHX), licorice and saline were used as tested antimicrobial agents, and saliva samples were collected before rinsing, at the end of 5 min T1) and 60 min T2) following rinsing, and the differences were calculated within 5-60 min T3). Plaques were evaluated following incubation, and counts of the growing colonies were performed in colony forming units CFU)/mL. Decreases in CFU were calculated in ratio for statistical analysis. Data were analyzed with Kruskal-Wallis, Mann-Whitney U, Friedman and Wilcoxon signed rank tests by Bonferroni correction, using a 0.05 of significance level. Results: CHX caused significantly different decreases for T1 and T2 p<0.05), but, there were no significant differences between CHX and licorice for T3 p>0.05). Conclusion: Licorice might be a useful agent for dental procedures and further studies are needed to learn more about the dose of licorice, the ratio of glycyrrhizin and the duration of dental therapy.Öğe Clinical evaluation of apex locator and radiography in primary teeth(WILEY-BLACKWELL, 2015) Oznurhan, Fatih; Unal, Murat; Kapdan, Arife; Ozturk, Ceren; Aksoy, SerkanAimThe aim of this in vivo study was to evaluate the accuracy and reliability of electronic apex locater and radiographic determination of root canal length in primary teeth. MethodologyA total of 32 human primary molar teeth (96 roots) were selected. After endodontic access preparation, root canals were irrigated with physiological saline solution. The access cavities were dried with cotton pellets and, the roots were dried with paper points before performing the electronic measurement. The root canal length measurements were first taken with an apex locater (EndoMaster), and then, a size 15K-file was inserted into the root canal, and radiography was taken to determine the working length measurements. The measurement data were recorded and compared by one-way anova and Kruskal-Wallis tests. P<0.05 was accepted for the significance. ResultsThe mean values for radiography were 13.231.92mm and for EndoMaster were 13.08 +/- 1.77mm. The accuracy of EndoMaster was 80.2% in correct measurements +/- 1mm (P<0.001). ConclusionThe electronic apex locators could be useful in determining working length and thereby decreasing the need for radiographs and exposure to ionizing radiation in pediatric dental patients.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 Effects of Er:YAG and Er,Cr:YSGG laser irradiation and adhesive systems on microtensile bond strength of a self-adhering composite(Springer London Ltd, 2023) Kaptan, Alper; Oznurhan, FatihThis study was aimed to evaluate the effects of Er:YAG and Er,Cr:YSGG laser irradiation and adhesive systems on the microtensile bond strength of Fusio Liquid Dentin (FLD) which is a self-adhering composite (SAC). Twenty-four freshly extracted human molar teeth were collected, and the enamel was removed from the occlusal surface to obtain a flat dentin surface. Twenty-four teeth were randomly divided into eight groups: Group 1: only Fusio Liquid Dentin (FLD) (Petron Clinical, Orange, California, USA) was applied to the dentin surface; Group 2: 37% Phosphoricacid (i-GEL, Medicinos Linija UAB, Lithuania) + FLD; Group 3: Single Bond Universal (SBU) (3 M ESPE, Germany) + FLD; Group 4: Adper Easy One (AEO) (3 M ESPE, Germany) + FLD; Group 5: Er:YAG laser + AEO + FLD; Group 6: Er:YAG laser + SBU + FLD; Group 7: Er,Cr:YSGG laser + AEO + FLD; and Group 8: Er,Cr:YSGG laser + SBU + FLD. After thermocycling, 1 x 1 mm(2) sticks were used for the mu TBS test (n = 10). Two sticks per group were used for SEM analysis. Fractured sample surfaces were evaluated using a stereomicroscope. Group 8 showed the highest mu TBS value (13.70 MPa), whereas Group 1 showed the lowest mu TBS value (5.60 MPa). There were no significant differences between Groups 2, 3, and 4 (P = 0.324), but Groups 5-8 showed statistically significant results that were higher than Groups 1-4 (P = 0.012). Adhesive failure mode was predominant followed by mixed failure. The evaluation of bonding of the FLD to dentin showed that the combined use of Er:YAG and Er,Cr:YSGG lasers with SBU and AEO on dentin surfaces improved the dentinal bond strength of the FLD.Öğe Evaluation of long-term results of two different calcium silicate based materials in primary molar teeth vital pulpotomies: An invivo study(Cumhuriyet University Faculty of Dentistry, 2020) Oznurhan, Fatih; Kayabaşi, Mevlut; Kesküş, BüşraObjectives: Pulpotomy is one of the pulp therapy for cariously exposed pulps in primary molar teeth. There are several materials that allows regeneration of the residual pulp. The purpose of this study was to evaluate the efficacy of two different calcium silicate based materials (ProRoot MTA, BIOfactor MTA) in primary molar teeth vital pulpotomies. Materials and Methods: A total of 12 children (24 human mandibulary primary second molar teeth) aged between 6 and 9 years were selected in this randomized clinical study. The patients were randomly assigned to receive the pulpotomy medicaments. All pulpotomized teeth were restored with stainless steel crowns and evaluated clinically and radiologically at 1, 3, 6 and 12 months. Statistical analysis using chi-square test was performed to determine the significant differences between two materials. Results: Neither clinical nor radiographical differences were seen in 1st, 3rd and 6th months but in 12th month ProRoot MTA showed statistically better results in clinical evaluation (p=0.047). Conclusions: Both two calcium silicate based materials showed similar clinical and radiographical results by the end of 6th month but ProRoot MTA showed better results at the end of 12th month. © 2020, Cumhuriyet University Faculty of Dentistry.Öğe Evaluation of Polypropylene Fiber Reinforced Glass Ionomer Cement: A Comparative In-Vitro Study(Sage Publications India Pvt Ltd, 2020) Oznurhan, Fatih; Ozturk, CerenAim: To compare the surface roughness, microtensile bond strength (mu TBS), and flexural strength of polypropylene (PP) fibers reinforced glass ionomer cements (GICs). Materials and Methods: A comparative in vitro study was designed to test the PP fiber reinforced GIC, which was formed when 0.5-1 mm length PP fibers were added into the powder of conventional GIC. Four groups were prepared (Group 1: control, Group 2: 1 wt% PP fiber, Group 3: 3 wt% PP fiber, and Group 4: 5 wt% PP fiber) to evaluate flexural strength, surface roughness values, and mu TBS. A total of 10 samples with 25 x 2.5 x 5 mm dimensions were prepared for each group to test flexural strength. Disk-shaped specimens (n = 10) of 2 mm thickness and 10 mm diameter were used to test surface roughness. A total of 24 human primary molar teeth were used to evaluate mu TBS, and 12 sticks were obtained for each group. The fractured surface analyses of samples from mu TBS was performed using scanning electron microscope. The data obtained from the experiments were recorded and analyzed with one-way analyses of variance technique, and the normality was tested using the Shapiro-Wilk technique. A significance level of .05 was used. Results: In flexural strength tests, Group 3 (3 wt% PP fiber) showed significantly increased values (p < .05) when compared with other groups. Group 4 (5 wt% PP) showed significantly highest values in surface roughness tests (p < .05). No significant differences were seen between the groups (p > .05) according to mu TBS results. More PP fibers were seen in fractured surfaces, when PP ratio increases. Conclusion: It was observed that increased PP fiber percentage showed increased surface roughness, and 3 wt% PP fiber gave optimal values for fracture toughness. Incorporation of PP fiber to GIC does not affect the bonding to primary tooth dentine.Öğe Evaluation of the accuracy of electronic apex locators, cone-beam computed tomography, and radiovisiography in primary teeth: An in vitro study(Wiley, 2020) Kayabasi, Mevlut; Oznurhan, FatihElectronic apex locators (EALs), cone-beam computed tomography (CBCT), and radiovisiography (RVG) claim to determine of working length (WL) in primary molar teeth. To evaluate the accuracy of WL determination by using three EALs, RVG, and CBCT imaging in extracted human primary molar teeth with/without root resorption. Twenty extracted primary molar teeth with resorption and 20 extracted primary molar teeth without resorption were used. After measuring actual lengths (AL) (Group 1), the electronic WL measurements were performed by using three different EALs [COXO C Smart-1 Pro (Group 2), iPex (Group 3), and Apex ID (Group 4)]. Two different image sets were obtained as follows: CBCT imaging (Group 5) and RVG (Group 6). AL measurements performed with an endodontic measuring ruler and compared with the EAL, CBCT, and RVG image measurements. For all groups, there were no significant differences between the teeth with resorption and without. There were no significant differences in measuring methods from AL and between the methods used (p > .05). When electronic and radiographic method were compared in different frequency ranges, there was no statistically significant difference (p > .05). This study showed that EALs, CBCT, and RVG have high accuracy in primary molar teeth both with resorption and without root resorption and can be used for determining WL.Öğe Evaluation of the Shear Bond Strength of Immediate and Delayed Restorations of Various Calcium Silicate-Based Materials with Fiber-Reinforced Composite Resin Materials(MDPI, 2023) Candan, Merve; Karaca, Fatima Kuebra Altinay; Oznurhan, FatihDue to significant tissue loss in teeth requiring pulp treatments, hermetic restoration of the remaining dental tissues is one of the most crucial factors in determining the treatment's success. The adhesion of composite resins to calcium silicate cements (CSCs) is considered challenging. Consequently, it is crucial to identify the optimal method for obtaining optimal adhesion. The aim of the present study is to evaluate the shear bond strength (SBS) values of immediate and delayed restorations with fiber-reinforced composites on powder-liquid, premixed, and resin-containing flowable CSCs. In the present study, the SBS values obtained after immediate (14 min) and delayed (7 days) restorations of three different CSCs (NeoMTA2, NeoPutty, and TheraCal PT) with three different resin composite materials (EverX Flow (TM), EverX Posterior (TM), and Filtek Z550) were compared. The fracture types were evaluated using a stereomicroscope and SEM. TheraCal PT had the highest SBS values for both immediate and delayed restorations, and the comparison with other materials showed a statistically significant difference (p = 0.001). In contrast, there was no statistically significant difference between the SBS values of NeoMTA and NeoPutty (p > 0.05). In both immediate and delayed restorations, there was no statistically significant difference between nanohybrid and fiber-reinforced composites (p > 0.05). The simple use and strong bonding ability of TheraCal PT with composite resins may provide support for the idea that it is suitable for pulpal interventions. Nevertheless, due to the in vitro nature of this study, additional in vitro and clinical studies are required to investigate the material's physical, mechanical, and biological properties for use in clinical applications.Öğe Morphological Analysis of the Resin-Dentin Interface in Cavities Prepared with Er, Cr:YSGG Laser or Bur in Primary Teeth(MARY ANN LIEBERT, INC, 2013) Oznurhan, Fatih; Olmez, AysegulObjective:The purpose of this study was to analyze the resin-dentin interface in cavities prepared with laser or bur in primary teeth. Background data:Erbium, chromium:yttrium-scandium-gallium-garnet (Er, Cr:YSGG) laser was expected to be an alternative cavity preparation method, enhancing surface alterations and producing morphological changes. Methods:Twenty extracted primary molar teeth were divided to four groups according to one of four cavity preparation and pretreatment regimens:Er, Cr:YSGG laser (G1), Er, Cr:YSGG laser + acid-etching (G2), bur (G3), and bur + acid-etching (G4). After applying composite resin to the cavities, the teeth were sectioned. The resin-dentin interface was analyzed under scanning electron microscopy (SEM) and ion analysis was performd with SEM-energy-dispersive X-ray spectroscopy (EDX) after immersion in ammoniacal silver nitrate solution. Results:In G1 and 2, the surfaces were wavy, and in G3 and 4, the surfaces were smooth. Microcracks were seen in some of the lased cavities. In G1 and 2, dentin tubules were exposed and there was lack of a smear layer. In G3, there were gaps and a smear layer in the resin-dentin interface, but no gaps or smear layer were observed in G4. In G2, the resin tags were increased, and some resin tags were broken in cavities, which were prepared with laser (G1 and 2). Conclusions:According to the results of this study, acid-etching was recommended after laser preparations, to have a better adhesion.Öğe Nanoleakage in primary teeth prepared by laser irradiation or bur(SPRINGER LONDON LTD, 2013) Oznurhan, Fatih; Olmez, AysegulThe aim of this in vitro study was to analyze hybrid layer and nanoleakage of composite resin restorations in cavities prepared by either Er,Cr:YSGG laser or bur, followed by acid etching in primary teeth. Ten extracted primary molar teeth were randomly allocated into two groups consisting of ten cavities according to surface treatment regimen: Er,Cr:YSGG laser + acid etching(group 1) and bur + acid etching(group 2). Restorations of all samples were completed. Then, teeth were sectioned and immersed to ammoniacal silver nitrate solution. After polishing, hybrid layer thicknesses were examined under scanning electron microscopy (SEM) and ion analysis was carried out with SEM/energy dispersive X-ray spectroscopy preparation in terms of nanoleakage. Hybrid layer thickness and the amount of silver ions were assessed for the acid-etched groups. The collected data were analyzed with independent sample t test and Spearman's rank correlation. In groups 1 and 2, the mean hybrid layer thicknesses were 4.25 +/- 1.41 and 5.24 +/- 1.07 mu m and the silver ion percentages were 10.97 +/- 13.81 and 22.79 +/- 21.62 %, respectively. Although no significant correlation was observed between the increase of hybrid layer thickness and the amount of silver ions, more silver ions were observed in group 2 (p < 0.05). According to the results of this study, acid-etched cavities prepared with laser promoted better results when compared to the acid-etched cavities prepared with bur.Öğe PYOGENIC GRANULOMA: A CASE REPORT(Cumhuriyet University Faculty of Dentistry, 2017) Carti, Ozgul; Gorgun, Emine Pirim; Oznurhan, Fatih; Kapdan, ArifePurpose: The purpose of this study is to evaluate the treatment and pursuit process of the pyogenic granuloma which has seenon 12 years old girl patient.Case Presentation: Pyogenic granuloma is a lesion which classifiedin vascular tumors which constitute 30-60% of all the reactive lesionsof gingival tissue. Trauma, infections of capillary wall, hormonalfactors, foreign materials, hypertension and poor oral hygiene areaccused for development of pyogenic granuloma. It may occur at allage groups and in both sexs. In the oral cavity, pyogenic granulomalesions are most frequently encountered on the gingiva. Definitivediagnosis can only be made by histopathologic examination ofbiopsied tissue. The treatment of this lesion is surgical excision. Ifsurgical excision removal is incomplete, the lesion has got the risk ofthe recurrence.A twelve years old female child applied to our clinic withcomplaints like on anterior palatinal region gingival bleedingand swollen condition on the same region. As beginningtreatment oral hygiene education was given to the patient andplaque and calculus were removed. Under local anesthesia thelesion was taken with excisional biopsy for doing distinctivediagnosis from the other pathological lesions which can be seenin oral cavity. In addition frenectomy surgery in the maxilla andridge augmentation operation in the mandible is performed toprovide more comfortable oral hygiene. Three-month follow-upresults of the patients were found to occur again in the region ofthe palatal gingival enlargement. As a result, it was decided tore-operations performed gingivectomy. Patient after operationscarried out gingivectomy was called to the appointment checkedand encourage oral hygiene.Conclusion: After taking of the excisional biopsy, the diagnosewas made shaping “The Pyogenic Granuloma” to the masswhich was examined histopathologically under the lightmicroscope. In the control inspection, there was not anyrecurrence clinically © 2017. Cumhuriyet Dental Journal. All Rights Reserved.Öğe SHEAR BOND STRENGTH OF DIFFERENT CALCIUM SILICATE BASED CEMENTS TO COMPOSITE AND COMPOMER(Galenos Publ House, 2024) Oznurhan, Fatih; Altinay, Fatma KubraObjective: Shear bond strength (SBS) of different calcium silicate cements (CSC) with different adhesive systems and restoratives was evaluated., Materials and methods: NeoMTA2, NeoPutty and TheraCalPT were used as CSC.120 acrylic blocks with a hole in the middle were prepared and divided into three groups (n=40) depending on the CSC used. CSCs were placed in the prepared cavities. All groups were divided into two subgroups and adhesives (Prime&BondNT) and Universal adhesive (Scotchbond) were applied. Then, composite (n=10) and compomer (n=10) were applied and polymerized. The prepared samples were kept at 37oC in a 100% humid environment for 24 hours and SBS tests was performed with an universal testing device. Fracture types were evaluated with SEM and stereomicroscope. Results: TheraCalPT had statistically significant increased SBS values when compared to other materials(p<0.05). On the other hand, SBS values of NeoMTA and NeoPutty were insignificant(p>0.05). The difference between the adhesive systems and the restorative materials themselves was not significant (p>0.05). Conclusion: The ease of use of TheraCal PT and its strong bonding ability with resin restorative materials may provide support for the idea that it is suitable for pulp therapies. However, since in vitro environmental conditions do not reflect intraoral conditions, it must be supported by clinical studies to understand the actual performance and clinical usability.Öğe The effect of different chelating agents on the push-out bond strength of proroot mta and endosequence root repair material(Istanbul Univ Press, Istanbul Univ Rectorate, 2019) Buldur, Burak; Oznurhan, Fatih; Kaptan, ArifePurpose This study aimed to evaluate the effects of 17% ethylenediaminetetraacetic acid (EDTA), 7% maleic acid (MA), and 10% citric acid (CA) on the push-out bond strength of ProRooT MTA and Endosequence Root Repair Material (ERRM) putty. Materials and Methods Eighty single-rooted extracted human teeth were instrumented to obtain a standardized immature teeth model. Based on the chelating agents tested, the specimens were randomly divided into three experimental groups: Group 1 (17% EDTA), Group 2 (7% MA), Group 3 (10% CA), and Group 4 (Positive Control) (n=20 for each group). Each group was further classified into two subgroups: Group A (ProRoot MTA) and Group B (Endosequence Root Repair Material (ERRM) putty) (n=10 for each subgroup). After irrigation and placement of cements, teeth were stored at 37 degrees C and in 100% humidity for a week. A total of 240 dentine discs (three discs per teeth) were obtained and subjected to push-out assay. Data was analyzed using two-way analysis of variance and Tukey's post hoc t-test. Results Both types of chelating agent and calcium silicate-based cement were significantly associated with the push-out bond strength values. The push-out bond strength was significantly less for CA as compared to EDTA or MA. ERRM had higher bond strength values than ProRoot MTA (p<0.05). Conclusion The use of chelating agents increased the push-out bond strength of CSC. Regardless of tested chelating agents, ERRM had higher bond strength values than ProRoot MTA.Öğe Time and sequence of eruption of permanent teeth in Ankara, Turkey(ELSEVIER SCIENCE BV, 2016) Oznurhan, Fatih; Ekci, Elif Sungurtekin; Ozalp, Serife; Deveci, Ceren; Delilbasi, Asli Evren; Bani, Mehmet; Oztas, NurhanIntroduction: The aim of this study was to determine time and sequence of eruption of permanent teeth in addition to caries status and gender differences in children and young adolescents in Ankara. Materials and methods: Cross-sectional data were collected by examining a total of 890 (407 female and 483 male) pre-school, primary and secondary school children of 5-15 years of age. The mean age of eruption and caries status of individual permanent teeth were recorded. Data were statistically evaluated with sample T-Test and One-way ANOVA. Results: Eruption tended to be earlier in girls than boys in most of the groups accept for the teeth 44. The sequences of eruption of permanent teeth were 6-1-2-4-3-5-7 in mandible, and 6-1-2-4-5-3-7 in maxilla in boys whereas 1-6-2-3-4-5-7 in mandible, and 6-1-2-5-4-3-7 in maxilla in girls. Increased caries prevalence was seen both in primary and permanent teeth. Conclusion: When compared with the other studies, eruption times show differences which were affected by genetics, genders, ethnicity, nutrition, fluoridation, carious condition, premature extraction of predecessors, socioeconomic variables, congenital anomalies and the changes in eruption time is significant when planning dental treatments. Copyright (C) 2015 The Japanese Society of Pediatric Dentistry. Published by Elsevier Ltd. All rights reserved.
