Person: KAZAK, MAĞRUR
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- PublicationMetadata onlyColour preference between adults and children during a dental treatment session(2017-02-01T00:00:00Z) Ozdas, Didem Oner; KAZAK, MAĞRUR; KAZAK, MAĞRURBackground: It is evidently shown that colour has physical, psychological and sociological effects on human beings. There are many studies showing the effects of colours on brain activity. Colour preferences may change from childhood to adulthood and are significantly different in various age groups. The aim of this study was to evaluate the adults and children in their preference for mouthrinses in various colours under stress condition during a dental treatment session.
- PublicationOpen AccessThe use of a liner under different bulk-fill resin composites: 3D GAP formation analysis by x-ray micro-computed tomography(2020-01-01T00:00:00Z) OĞLAKÇI, BURCU; Kazak, Magrur; DÖNMEZ, NAZMİYE; Dalkilic, Evrim; KÖYMEN, SAFİYE SELİN; OĞLAKÇI, BURCU; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE; DALKILIÇ, EVRIM; KÖYMEN, SAFİYE SELİNGap formation of composite resin restorations is a serious shortcoming in clinical practice. Polymerization shrinkage stress exceeds the tooth-restoration bond strength, and it causes bacterial infiltration within gaps between cavity walls and the restorative material. Thus, an intermediate liner application with a low elastic modulus has been advised to minimize polymerization shrinkage as well as gap formation. Objective: The purpose of this in vitro study was to assess gap formation volume in premolars restored with different bulk-fill composites, with and without a resin-modified glass-ionomer cement (RMGIC) liner, using x-ray micro-computed tomography (micro-CT). Methodology: Sixty extracted human maxillary premolars were divided into six groups according to bucco-palatal dimensions (n=10). Standardized Class II mesio-occluso-distal cavities were prepared. G-Premio Bond (GC Corp., Japan) was applied in the selective-etch mode. Teeth were restored with high-viscosity (Filtek Bulk Fill, 3M ESPE, USA)-FB, sonic-activated (SonicFill 2, Kerr, USA)-SF and low viscosity (Estelite Bulk Fill Flow, Tokuyama, Japan)- EB bulk-fill composites, with and without a liner (Ionoseal, Voco GmbH, Germany)-L. The specimens were subjected to 10,000 thermocycles (5-55oC) and 50,000 simulated chewing cycles (100 N). Gap formation based on the volume of black spaces at the tooth-restoration interface was quantified in mm3 using micro-computed tomography (SkyScan, Belgium), and analyses were performed. Data were analyzed using repeated-measures ANOVA and the Bonferroni correction test (p < 0.05). Results: The gap volume of all tested bulk-fill composites demonstrated that Group SF (1.581±0.773) had significantly higher values than Group EB (0.717±0.679). Regarding the use of a liner, a significant reduction in gap formation volume was observed only in Group SFL (0.927±0.630) compared with Group SF (1.581±0.773). Conclusion: It can be concluded that different types of bulk-fill composite resins affected gap formation volume. Low-viscosity bulk-fill composites exhibited better adaptation to cavity walls and less gap formation than did sonic-activated bulk-fill composites. The use of an RMGIC liner produced a significant reduction in gap formation volume for sonic-activated bulk-fill composites.
- PublicationOpen AccessCan Fiber Application Affect the Fracture Strength of Endodontically Treated Teeth Restored with a Low Viscosity Bulk-Fill Composite?(2019-01-01) Dalkilic, Evrim Eliguzeloglu; Kazak, MAĞRUR; Hisarbeyli, DUYGU; Fildisi, MEHMET ALİ; Donmez, NAZMİYE; Arisu, Hacer Deniz; DALKILIÇ, EVRIM; KAZAK, MAĞRUR; HİSARBEYLİ, DUYGU; FİLDİŞİ, MEHMET ALİ; DÖNMEZ, NAZMİYEObjective: The aim of this study is to evaluate the effects of different fiber insertion techniques and thermomechanical aging on the fracture resistance of endodontically treated mandibular premolar teeth restored using bulk-fill composites. Materials and methods: Eighty human mandibular premolar teeth were randomly divided into eight groups: Group IN, Group BF, Group PRF1, Group PRF2, Group IN-TMA, Group BF-TMA, Group PRF1-TMA ,and Group PRF2-TMA. Group IN (intact) and Group IN-TMA (intact but subjected to thermomechanical aging) served as control groups. In the other six groups, endodontic treatment was performed and standardized mesio-occluso-distal (MOD) cavities were prepared. In BF, PRF1, and PRF2, the cavities were restored with bulk-fill composite only, bulk-fill/Ribbond, and bulk-fill/additional Ribbond, respectively. In BF-TMA, PRF1-TMA, and PRF2-TMA, the teeth were subjected to thermomechanical aging after the restorations. All of the teeth were fractured on the universal testing machine. Fracture surfaces were analyzed with a stereomicroscope. Results: Control groups showed significantly higher fracture strengths than tested groups (P<0.05). No statistically significant difference was observed among the tested groups (P>0.05). Most of the favorable fractures were seen in PRF1, PRF2, and PRF2-TMA. Most of the unfavorable fractures were seen in BF-TMA. Conclusions: Although fiber insertion with different techniques did not increase the fracture strength of teeth restored with bulk-fill composites, it increased the favorable fracture modes. Thermomechanical aging did not change the fracture strength of the groups.
- PublicationMetadata onlyİlave Fiber Uygulaması Düşük Viskoziteli Bulk Fil Rezin ile Restore Edilmiş Endodontik Tedavi Görmüş Dişlerin Kırılma Dayanımını Etkiler Mi(2018-11-30T00:00:00Z) DALKILIÇ, EVRİM; FİLDİŞİ, MEHMET ALİ; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE; DENİZ ARISU, HACER; HİSARBEYLİ, DUYGU; FİLDİŞİ, MEHMET ALİ; DALKILIÇ, EVRIM; KAZAK, MAĞRUR; DÖNMEZ, NAZMİYE
- PublicationMetadata onlyExamination of Paramolar Tubercles in Turkish Population Using Cone Beam Computed Tomography(2017-12-01T00:00:00Z) ÇOLAKOĞLU, GİZEM; KAZAK, MAĞRUR; ELÇİN, MEHMET ALİ; SOMTÜRK, ESRA; GÜNAL, ŞÖLEN; KAZAK, MAĞRURParamolar tubercle (PT) is an additional cusp occuring on buccal surface of both upper and lower permanent molars. PT is also known as parastyle when tubercle is present in upper molars, as protostylid when tubercle is present in lower molars. The aim of this study was to evaluate prevalence of PTs in Turkish population with cone beam computed tomography (CBCT). Presence of PT in molar teeth were evaluated retrospectively using CBCT images of 210 patients (102 male, 108 female) between 18-77 years old. A total of 909 teeth were analyzed. Because of various reasons some teeth were excluded and final analyze was done with 653 teeth. Prevalence of PT was found as 2.76 % (18 out of 653). Highest frequency of PT was detected 5 in #27, 4 in #17, 2 in #48 among all molar teeth respectively. In two cases; 2 PTs were on the same tooth, bilateral PT was found only in one case. PT was undetected on upper first molars. Prevalence of PTs on permanent molars is a rare phenomenon in the studied population. Use of CBCT in such anatomic variations will provide valuable and detailed information during treatment modalities. Since this pilot study represents Turkish subpopulation, comprehensive studies with increased number of cases should be undertaken to clarify the prevalence of paramolars in Turkish population. Advanced imaging techniques like CBCT will be more helpful in understanding and detecting exact morphological and anatomical variations of PTs during treatment modalities.