Elif Bakır - Academia.edu (original) (raw)

Papers by Elif Bakır

Dental Materials Journal, 2021

The aim of this study was to compare the local and systemic effects of current pulp capping mater... more The aim of this study was to compare the local and systemic effects of current pulp capping materials containing resin with those of traditional materials in an animal study. A total of 48 rats were used: a control group (n=12) (sub-control and negative control), a resin-containing group (n=18) (Calcimol LC, Theracal LC, Activa-BioActive Base/Liner), and a traditional group (n=18) (Biodentine, ProRoot MTA, Dycal). The materials which had been placed in polyethylene tubes were implanted in subcutaneous pockets. The rats were sacrificed at 1, 2, or 4 weeks. Evaluations were made of subcutaneous connective tissue, the left kidney, liver, and blood samples. Of all the study groups, MTA demonstrated biocompatibility at a level close to that of the control groups. Inflammation was observed to be more severe in resin-containing materials, but Activa Base/Liner showed a more successful local and systemic tissue response.

The most important problem encountered after dental caries is undoubtedly injuries to primary and... more The most important problem encountered after dental caries is undoubtedly injuries to primary and permanent teeth. Trauma affecting the oral cavity can affect the soft tissues of the lips, cheeks, tongue and floor of the mouth and the structures that form the temporomandibular joint. Luxation injuries are the most common traumatic tooth injury in primary dentition, while crown fractures are more frequently reported in permanent teeth. Traumas cause functional and aesthetic problems in the patient, and this aesthetics, making an ideal restoration to prevent loss of function is extremely important for the patient's psychology. Composite restorations provide conservative solutions in young individuals compared to veneer or other prosthetic restorations. Although composite restorations of permanent incisors with crown fractures are not seen as complicated cases, attention should be paid to the tooth contours that will facilitate function and aesthetics. In this study, restoration of three clinical cases with crown fracture by direct composite resin applications is described.

Biomedical Research-tokyo, 2020

With the increasing health awareness in society, the expectations of individuals from dentists ha... more With the increasing health awareness in society, the expectations of individuals from dentists have increased. New materials are produced and presented to the market in the field of dentistry. This situation requires the examination and evaluation of the physical, chemical, and biological properties of these materials. The minimally invasive technique that minimizes substance loss in teeth has become feasible with the development of adhesive systems. The minimally invasive method that minimizes tooth substance loss has become possible with the development of adhesive systems [1]. Total-etch adhesive systems are based on the demineralization of dental tissue with 37% phosphoric acid and then applying primer and then adhesive resin on the rough surface formed on the tooth surface. With the polymerization of adhesive resin with light, resin tags are formed, and micro-mechanical bonding occurs between the tooth and the adhesive system [2]. A resistant hybrid layer is formed between the penetration of monomers and subsequent polymerization between the collagen fibrils released by acid application. Three-step systems are considered a gold standard. However, clinicians' desire to save time and effort has resulted in the development of single-bottle systems, in which adhesive and primer are collected in a single solution [3-7]. Self-etch adhesive systems are classified as twostep and single-step according to the number of steps and strong, moderate and mild based upon pH-degrees. In recent years, single-step "all-in-one" self-etch systems have been produced that combine three application steps (Acid, primer and adhesive resin) to provide ease of application.

Journal of advanced oral research, Mar 10, 2021

Aim: To evaluate the bond strengths of pulp capping materials (Dycal, ProRoot MTA, Biodentine, Th... more Aim: To evaluate the bond strengths of pulp capping materials (Dycal, ProRoot MTA, Biodentine, TheraCal LC, Calcimol LC, and ApaCal ART) and different adhesive systems (Gluma 2 Bond, Clearfil SE Protect, Gluma Self Etch, Clearfil S 3 Bond Plus, Gluma Bond Universal, Clearfil S 3 Bond Universal). Materials and Methods: Two hundred fifty-two acrylic blocks were prepared in which cylindrical cavities of 4 × 2 mm 3 were formed. Pulp capping materials were placed in the cavities. Different adhesive systems were applied to each pulp capping material group. After applying the composite resin, the shear bond strength (SBS) values of the specimens were determined in the Instron test device. Fracture types were evaluated using a stereomicroscope and a scanning electron microscope. Data were analyzed by Shapiro–Wilk’s and Kruskal–Wallis H test. Results: There is a statistically significant difference between pulp capping materials in terms of SBS values ( P < .05). Dycal’s SBS was found significantly lower than other materials, and the highest bond strength was observed in Calcimol LC material. Although there is no statistically significant difference ( P > .05) between the adhesive agent groups in terms of SBS, Gluma 2 Bond showed the highest bond strength value. Conclusion: In traditional pulp capping materials such as Dycal, MTA, and Biodentine, using a two-step self-etch adhesive system can result in higher bond strength values. In resin-based TheraCal LC,, ApaCal ART, and Calcimol LC materials, it may be recommended to use a two-step etch and rinse adhesive system.

Aims: This study was undertaken to explore the effects of the pandemic period for students in the... more Aims: This study was undertaken to explore the effects of the pandemic period for students in the 4th and 5th years of a dentistry program who were completing internships through the Dicle University Faculty of Dentistry in terms of their health, education, and socioeconomic status. Methods: For this study, a total of 200 voluntary participants completing internships in the 4th or 5th year of enrollment in the Dicle University Faculty of Dentistry were asked to fill out a questionnaire that was created with the aim of understanding the effects of the COVID-19 pandemic on interns in terms of education, health, transportation, and socioeconomic status. In the statistical analysis of the survey data, a frequency distribution table was created for general characteristics and the chi-square test was applied to compare the obtained answers. Confidence intervals were evaluated at 95% and the significance value was accepted as 5%. Results: The overwhelming majority of the participants reported that the pandemic affected their general health, and almost all of them reported that they were worried about the future and that the COVID-19 pandemic had reduced the quality of their education and their academic motivation. More than half of the participants stated that they were adversely affected by online education and that they had difficulties in terms of transportation while continuing their internships during the pandemic. It was also determined that a relative or acquaintance of nearly all of the participants had been diagnosed with COVID-19, and nearly half of the participants lost a relative or acquaintance due to COVID-19. Conclusion: This study has revealed that dentistry students were negatively impacted by the COVID-19 pandemic to a larger extent than expected, with serious consequences for their mental health, hopes for the future, and general enjoyment of life. We conclude that it is important to provide regular psychological support, academic assistance, and motivational programs for dentistry students, as well as support for all healthcare professionals in general, in order to prevent the problems that arose from the pandemic from becoming permanent.

Journal of health sciences and medicine, Jan 12, 2023

Aim: Nano-filled composite resin materials used for aesthetic purposes have better mechanical, po... more Aim: Nano-filled composite resin materials used for aesthetic purposes have better mechanical, polish ability, and color stability properties compared to other composite resin types. The aim of this in vitro study was to evaluate the effect of 5 different single serve sachet powder drinks popular among adolescents in recent years on the color change of Nano hybrid composite resin material. Material and Method: In this study, Nano hybrid composite resin (Filtek Z550) and five different types of sachet drinks (cherry flavored powdered drink [Cherry-dp], instant sachet Turkish coffee [IS-Turkish-c], instant sachet filter coffee [IS-Filter-c], instant tea [I-tea], 3-in-1 granulated coffee [3-in-1 Granulated-c] and distilled water [DW]) were used. A total of 42 2×10 mm disc-shaped samples were prepared. The prepared samples were kept in DW in an oven at 37°C for 24 hours and the initial color measurements were made with a spectrophotometer (Vita Easy Shade Advance 4.0., Germany). The samples were divided into 6 groups (n=7) to be kept in 5 colorant solutions and DW (control group). Composite samples were kept in an oven at 37°C and the solutions were changed once a week. Color change was measured before and after 1, 7, and 28 days of immersion. Shapiro Wilk test was used to check whether the data conformed to normal distribution. The variables were analyzed with one-way analysis of variance ANOVA and post-hoc Tukey test (p<0.05). Results: After 28 days of immersion, IS-Turkish-c, IS-Filter-c, and I-tea led to statistically significant discoloration in composite resin (p<0.05). In contrast, no statistically significant difference in discoloration was observed after 24 hours and 7 days of immersion (p>0.05). Conclusion: The results obtained in the present study showed that the Nano hybrid composite material is sensitive to discoloration by long-term use of IS-Turkish-c, IS-Filter-c, and I-tea. It was thought that Nano hybrid composite should not be preferred especially in young people with high coffee and tea consumption or necessary warnings should be given if it is to be used.

Background: The aim of this study was to evaluate the awareness of healthcare personnel in the De... more Background: The aim of this study was to evaluate the awareness of healthcare personnel in the Dentistry Faculty of Dicle University about "the legal responsibilities of dental practitioners" and "patient rights". Methods: The study included 150 volunteers who were healthcare workers in the Faculty of Dentistry , Dicle University between June and July 2019. The subjects were randomly selected from 5 different Professional groups and data were collecte dusing a single data collection form. All items on the form were grade dusing a 5-point Likert-type response. In the statistical analyses, Pearson' s Chi-square, Yates Chi-square and the Fisher Exact tests were used. Results:The questionnaire responses showed that 61.3% of the study participants had received training on patient rights and 56.7% had information about the legal responsibilities of dentists. The rate of dentists who had received training was below average and 38.9% of the dentists reported not having any information about their own legal responsibilities. A positive response was given to the items on the questionnaire by 58% and a negative responseby 33%. The responses to some items were seen to have been affected by variables such as age, gender and professional group. Conclusion: Although some confusion was experienced by the healthcare personel about patient rights and the legal responsibilities of dentists, the levels of awareness were evaluated as satisfactory.

Journal of advanced oral research, Mar 27, 2022

Aim: The study aimed at evaluating the antibacterial activities of four adhesive systems against ... more Aim: The study aimed at evaluating the antibacterial activities of four adhesive systems against three bacterial species in two time periods. Material and Method: Four different antibacterial adhesive materials, a nonantibacterial adhesive (Clearfil SE Bond), and a vancomycin-impregnated antibiogram disc were used in the study. The antibacterial activities of Gluma 2 Bond, Clearfil SE Protect Bond (CPB) Primer, FL Bond II (FLB), and Peak Universal Bond (PUB) on Enterococcus faecalis, Streptococcus mutans, and Lactobacillus acidophilus were evaluated by the disc diffusion method. Antibiogram discs onto which the adhesive agent was dripped were placed on agar plates at intervals. Inhibition zone diameters around the discs, which were incubated, were measured. Statistical analysis was done with the one-way analysis of variance. Results: As a result of our study, it was concluded that the CPB Primer was the agent with the highest antibacterial activity, including the control group. One of the remarkable findings in our study was that CPB Primer showed the most significant effect against Streptococcus mutans among microorganisms. Although not statistically significant, the antibacterial effect of adhesive agents at the end of the 48th h was found to be higher than at the end of the 24th h ( P &gt; .05). Conclusion: The strong antibacterial activity of the CPB Primer on all three bacteria suggests that it is a preferable adhesive agent in deep dentinal caries as well as in initial caries lesions.

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi, 2016

Oral health & preventive dentistry, 2018

PURPOSE To qualitatively and quantitatively compare the cytotoxic potentials of five different on... more PURPOSE To qualitatively and quantitatively compare the cytotoxic potentials of five different one-step self-etching adhesives: Prime&Bond One-Select (PB-OS), Optibond All-in-One (OB-AIO), G-Bond (GB), Clearfil Universal Bond (CUB), Single Bond Universal (SBU). MATERIALS AND METHODS During the first stage of the study, the cytotoxic activities of the test materials were evaluated qualitatively using the direct contact method. In this method, the test materials were placed directly into a monkey kidney epithelial cell culture medium. Reaction zones which occurred in the culture medium were evaluated, in addition to the density and changes in the morphology of the cells. During the second stage, the cytotoxic potential of four different dilutions (1%, 0.1%, 0.01%, 0.001%) of the test materials on L929 rat fibroblast cells was quantitatively evaluated at three different time periods (24 h, 48 h, 72 h) with the MTT tetrazolium-based assay. RESULTS In the first stage, a zone exceeding 1 ...

Biotechnology & Biotechnological Equipment, 2021

The aim of this study is to evaluate the knowledge level of the dentistry students about organ tr... more The aim of this study is to evaluate the knowledge level of the dentistry students about organ transplantation and donation. A data collection questionnaire was applied to measure the level of know...

Selcuk Dental Journal, 2019

Selcuk Dental Journal, 2017

Yeditepe Dental Journal, 2018

Bu çalışmada; dört farklı laminate veneer restorasyon materyalinin bağlanma dirençleri karşılaştı... more Bu çalışmada; dört farklı laminate veneer restorasyon materyalinin bağlanma dirençleri karşılaştırmalı olarak değerlendirildi. Gereç ve Yöntem: Bu invitro çalışma; ortodontik veya periodontal nedenlerle yeni çekilmiş, çürüksüz, restorasyonsuz 60 adet üst santral keser diş üzerinde gerçekleştirildi. Tüm dişlerin labial yüzünde 0,5 mm, mesial ve distal kontakt noktalarında 0,2 mm ve gingival basamakta 0,3 mm olacak şekilde chamfer tarzında standart kavite preparasyonları hazırlandı. Kavite preparasyonları tamamlanan dişler rastgele 15'erli dört gruba ayrıldı. Birinci gruba Grandio, ikinci gruba Gradia, üçüncü gruba Amaris ve dördüncü gruba Tetric ceram restoratif materyalleri üretici firmaların önerileri doğrultusunda yerleştirilerek görünür ışık ile polimerize edildi. Daha sonra Instron test cihazına yerleştirilen dişlerdeki restorasyonlar üzerine farklı yükler uygulanarak materyallerin doğal dişten ayrılma değerleri Newton cinsinden kaydedildi. Bulgular: Ölçümler sonucu elde edilen veriler istatistiksel olarak tek yönlü varyans analizi (one way ANOVA) ve TUKEY HSD testleri kullanılarak değerlendirildi. Kırılma direnci açısından materyaller arasında anlamlı bir fark bulunamadı (p>0,05). Sonuçlar: Sonuç olarak araştırmada kullanılan nanohibrid yapılı kompozit rezin materyali olan Grandio gruplar arası değerlendirmede kırılma direnci en yüksek, mikrohibrit yapılı kompozit rezin materyallerinden Amaris ise, kırılma direnci en düşük kompozit rezin olarak belirlendi. Anahtar kelimeler: laminate veneer, kompozit rezin, bağlanma direnci ABSTRACT Aim: In this study, the bond strenght of four different laminate veneer restoration materials were evaluated comparatively. Materials and methods: In this in vitro study was performed using freshly extracted for orthodontic or periodontal reasons, non-carious, the restoration free 60 upper central incisors. Cavity preparations were prepared as 0.5 mm in labial face, 0.2 mm in mesial and distal contact points and 0.3 mm in gingival step for all teeth. Cavity preparation completed teeth were randomly divided into four groups. The first group Grandio, the second group Gradia, the third group Amaris and the fourth group Tetric ceram restorative materials which placed in line with the manufacturer's recommendations, were polymerized with visible light. Applying different loads on dental restorations placed in the Instron test device, separation values from natural tooth of materials were recorded in Newton type. Results: The materials evaluated statistically using One-way ANOVA and TUKEY HSD tests, significant difference was not observed among the materials in terms of fracture resistance (p>0.05). Conclusions: Nanohybrid composite Grandio is determined ÖZGÜN ARAŞTIRMA 20 7tepeklinik as the material which has the highest bond strength value. Microhybrid composite Amaris is determined as the material which has the lowest bond strength value.

Scanning, 2016

Finishing and polishing techniques have great importance on the long term success and aesthetics ... more Finishing and polishing techniques have great importance on the long term success and aesthetics of the composite restorations. In this study it was aimed to examine the effect of three different posterior composites on surface texture with various finishing and polishing procedures. Three different posterior composites, Filtek P60, Clearfil Majesty Posterior and Cavex Quadent Posterior Dense, and three different finishing and polishing procedures diamond finishing burs, tungsten carbide burs and Sof-Lex discs were used in the study. The specimens were 5 mm in diameter and 2 mm in height. The surface roughness was measured at three seperate points with a profilometer device and the Ra values were recorded. A one-way analysis of variance (ANOVA) and Kruskal-Wallis variance analysis was applied for statistical analysis and p < 0.05 was accepted significant. No statistically significant differences were found between the composite resins with respect to surface roughness (p > 0.05). A statistically significant difference was found between the groups of diamond, carbide, and Sof-Lex groups (p < 0.05). Sof-Lex polishing system was more successful than the diamond and carbide burs in the finishing and polishing procedures of composites.