Ebru DELİKAN

Makale/Derleme | 2021 | Journal of Dentistry Indonesia

Objective:To determine the differences in treatment strategies and material preferences for deep dentine carious lesions (DDCLs) management among general and specialist dentists. Methods:Dentists working in universities, oral and dental health centers, or private practice were administered a 14-item web-based questionnaire regarding demographic and occupational characteristics, approaches to DDLCs, pulp capping methods, and preferences for restorative materials. The data were examined using descriptive statistical analysis and Pearson’s chi-square tests.

Ebru DELİKAN

Makale/Derleme | 2021 | Cyprus Journal of Medical Sciences

BACKGROUND/AIMS The aim of this study was to evaluate the effectiveness of tactile sensation, digital periapical radiography, and two varieties of electronic apex locators (EALs) as methods of determining working length in root canal treatment for primary molars. MATERIAL and METHODS In this study, 30 infected mandibular primary second molar teeth in 12 children aged 5-8 years were analyzed. The working length was determined for each tooth using the tactile sensation, digital radiography, the ProPex PixiVR, and IpexVR apex locators separately. RESULTS The mean root canal measurements taken using tactile sensation, Ipex, radiography, . . . and Propex Pixi were 11.02 6 2.05 mm, 9.47 6 1.71 mm, 9.73 6 1.57 mm, and 8.85 6 1.58 mm, respectively. The radiographic method yielded results that were similar to those derived with the apex locators but differed from the measurements obtained via tactile sensation. CONCLUSION EALs can be used to safely determine the working length in root canal treatment for primary molars Daha fazlası Daha az

Ebru DELİKAN

Makale/Derleme | 2021 | Dental and Medical Problems58 ( 3 ) , pp.291 - 298

Amaç: Bu çalışmanın amacı, genel anestezi altında dental tedavileri yapılacak çocukların ebeveynlerinin genel anestezi ile ilgili bilgi düzeylerini ve preoperatif anksiyete düzeylerini değerlendirmektir.Yöntem: Çalışmaya Erciyes Üniversitesi’ne dental tedaviler için başvuran ve genel anestezi endikasyonu koyulan çocuk hastalarınebeveynlerini dâhil edilmiştir. Çocukları ameliyathaneye alındıktan hemen sonra ebeveynlerin bilgi düzeyleri modifiye Standart Anestezi Öğrenme Testi (SALT) ile anksiyete düzeyleri modifiye Vizüel Analog Skala (VAS) ile değerlendirilmiştir.Bulgular: Anketi 148 kadın (63), 87 erkek (37) olmak üzere toplam 235 . . .ebeveyn tamamladı. Katılımcılar en fazla 31-40 yaş aralığında idi (54,9). Eğitim durumlarına göre ebeveynlerin çoğunluğunu lise mezunları oluşturuyordu (39,1). Ebeveynlerin 64,3’ünün daha önceden anestezi deneyimi vardı. Ebeveynlerinin anksiyete skorları ile genel anestezi deneyimi, eğitim düzeyi, çocuk sayısı arasında anlamlı bir fark bulunamadı (p>0,05). Kadınların anksiyete düzeyi erkeklere göre anlamlı olarak daha yüksekti ( Daha fazlası Daha az

Kübra ÖZTÜRK

Makale/Derleme | 2021 | JOURNAL OF OSSEOINTEGRATION

ims Atrophic jaws make implant planning difficult due to the lack of bone, and this situation directs the surgeon to advanced surgical methods. Today, autogenous grafts are still the gold standard. The aim of this study was to evaluate the bone stability of horizontal bone grafts taken from the iliac crest. Materials and metods Twenty patients receiving horizontal bone grafts were included in this retrospective cohort study. All patients were treated with bone harvested from the anterior iliac crest. The measurements were made by means of a caliper. Screw heads reference point taken. Resorption rate was followed up in a total of 188 . . . edentulous areas. Results Graft resorption rate was 34.66% (± 20.53), 32.42% (± 19.39) in the maxilla and 48.03% (± 22.34) in the mandible. It was observed that the average bone thickness increased from 2.38 mm to 7.22 mm. Conclusions The result of the present study highlight that thicker block grafts, which were applied due to the expected resorption rate, result in a higher resorption rate after recovery. Therefore, by considering soft tissue margins, the importance of harvesting a sufficient, but not excessive, amount of grafting is underscored Daha fazlası Daha az

Turan Emre KUZU | Hasan Murat AYDOĞDU

Makale/Derleme | 2021 | Smyrna Tıp Dergisi

Amaç: Diş eksikliklerinin giderilmesinde implant uygulamalarının popülaritesi gün geçtikçe artmaktadır. Osseointegrasyonu tamamlamış implantların üzerine kuron-köprü protezleri yapılarak hastaların tedavileri tamamlanır. Ancak kimi zaman protetik ve cerrahi komplikasyonlar kimi zamansa implant çevresi dokuların enfeksiyonları sebebiyle simante edilen protezler tekrar çıkarılmak zorunda kalır ve bu geri çıkarma işlemi sırasında uygulanan kuvvetlerin implant osseointegrasyonuna ve kemik implant arayüzüne etkisi incelenmemiştir. Gereç ve Yöntem: Bu çalışmada implant üstü sabit protezlere uygulanan farklı kuron söküm işlemlerinin implan . . .tların osseointegrasyonlarına olan etkilerini incelemek amaçlanmıştır. Bu çalışmada 10 adet Yeni Zelanda tavşanının her birinin sağ ve sol tibiasına 2’şer adet olmak üzere toplamda 40 adet dental implant (Nucleoss t6, 3,5x8mm) yerleştirilmiştir. İmplantların stabilitesi ve osseointegrasyonları Rezonans frekans analizi yöntemi (Ostell) ile implant yerleştirildiği anda ve 4. haftanın sonunda olmak üzere 2 kez ölçülmüştür. Ardından 15o açılı prefabrike dayanak üzerinden dijital ölçü alınmış ve CAD/CAM ile tasarlanan ve 40 adet kuron Cr-Co kron üretilmiştir. Kuronlar 2 gruba ayrılarak cam iyonomer bazlı implant simanı ile (Fujitemp) ve polikarboksilat siman ile (Durelon) simante edilmiştir. Daha sonra her grup kendi içinde tekrar ikiye ayrılmış, ilk gruptaki (A) kronlar elle kurulan otomatik kron sökücü ile, ikinci gruptaki (B) kronlar ise, hava ile çalışan kinetik darbeli kron sökücü (Coronaflex, KaVo) ile sökülmüştür. Kron sökümleri sonrası ostell ölçümleri yapılmış ve ayrıca her bir implantın ters tork değeri ölçülmüştür. Bulgular: Her iki yapıştırıcı siman grubu için de coronaflex ile kron sökümü yapılan gruplarda kron sökümü sonrası ostell değerlerinde, 4. hafta ostell değerlerine göre istatistiksel olarak anlamlı olarak düşüş görülmüştür (p0.05). Diğer ostell değerlerinde ve ters tork ölçümlerinde grup içi ve gruplar arası yapılan karşılaştırmalarda istatistiksel olarak anlamlı bir fark görülmemiştir (p0.05). Sonuç: Çalışmadan elde edilen veriler ışığında simante edilmiş implant üstü kronların sökümünde coronaflex ile yapılan söküm işleminin elle kurulan otomatik kron sökücüye oranla implant stabilitesi üzerinde daha fazla olumsuz etki yarattığı gözlenmiştir. Objecties: The popularity of implant applications in the elimination of tooth deficiencies is increasing day by day. The treatment of the patients is completed by making crown-bridge prostheses on the implants that have completed osseointegration. However, sometimes due to prosthetic and surgical complications and sometimes infections of the tissues around the implant, the cemented prostheses have to be removed again, and the effect of the forces applied during this removal process on the implant osseointegration and the bone implant interface has not been studied. In this study, it is aimed to examine the effects of different crown removal procedures applied to implant fixed prostheses on osseointegration of implants. Materials and Method: In this study, a total of 40 dental implants (Nucleoss t6, 3.5x8mm) were placed in the right and left tibia of 10 New Zealand rabbits, 2 each. Stability and osseointegration of the implants were measured twice, at the time of implant placement and at the end of the 4th week, using the resonance frequency analysis method (Ostell). Then, digital measurements were taken on the 15o angled prefabricated abutment and 40 crowns of Cr-Co crowns were produced, designed with CAD / CAM. Crowns were divided into 2 groups and cemented with glass ionomer-based implant cement (Fujitemp) and polycarboxylate cement (Durelon). Later, each group was divided into two within itself, the crowns in the first group (A) were removed with a hand-assembled automatic crown remover, and the crowns in the second group (B) were removed with an air accelerated kinetic impact crown remover (Coronaflex, KaVo). Ostell measurements were made after crown removal and also the reverse torque value of each implant was measured. Results: For both adhesive cement groups, there was a statistically significant decrease in ostell values after crown removal in the groups that were removed with coronaflex compared to the 4th week ostell values (p0.05). There was no statistically significant difference in other ostell values and reverse torque measurements in the comparisons between groups and within groups (p0.05). Conclusion: In the light of the data we obtained from the study, it was observed that the removal process performed with coronaflex in the removal of the cemented over implant crowns has more negative effects on the stability of the implant compared to the manual crown remover Daha fazlası Daha az

Turan Emre KUZU

Makale/Derleme | 2021 | Cumhuriyet Dental Journal

Objectives: The purpose of this study is to compare the tensile strength of different types of surgical suture materials. Materials and Methods: Current study, the tensile strengths of 4 different suture materials was compared. [(1-4/0 silk suture 2-4/0 propylene suture 3-4/0 Polyamide suture 4-4/0 Poly[Glycolide-Co-L-Lactide] (90:10) (PGLA) suture)] The tensile strength of a total of 40 samples was calculated, with 10 samples in each group. In the study, the tensile strength of the sutures was calculated using a universal tester, the sutures were tightened to both poles of the test device and fixed with a distance of 15 mm between . . .the poles, tensile force was applied so that both poles of the test device moved away from each other at a speed of 25cm/min until the sutures broke, and the force value of the sutures at the moment of brake was recorded in Newton units (N) as the tensile strength of suture. Statistical analysis of the data was evaluated by OneWay ANOVA and Tukey HSD tests. Results: In the statistical analysis of the tensile strength of the suture materials, the difference between the tension resistance of the PGLA and Polyamide suture was not statistically significant, but the difference between all other suture materials was statistically significant ( Daha fazlası Daha az

Ceren AYDEMİR

Makale/Derleme | 2021 | Global Journal of Economics and Business Studies

Bu çalışmanın amacı, Austin ve diğerleri (2007) tarafından geliştirilen “Duygusal Manipülasyon” ölçeğinin Grieve ve Mahar (2010), Grieve (2011), Grieve ve Panebianco (2013), Hyde ve Grieve (2014) ve Nagler vd. (2014) tarafından kullanılan alt ölçeği olan “Duygusal Manipülasyon” un Türkçe uyarlamasını yapmak, geçerlilik ve güvenilirliğini incelemektir. Araştırma kolayda örnekleme yöntemiyle belirlenen, farklı meslek gruplarından (devlet memuru, öğretmen, akademisyen, özel sektör çalışanı) 141 çalışan ile gerçekleştirilmiştir. Verilerin analizinde frekans analizi, güvenilirlik analizi, açıklayıcı faktör analizi, doğrulayıcı faktör ana . . .lizlerinden yararlanılmıştır. Ölçeğin Cronbach Alfa değeri α=0,926 olarak hesaplanmıştır. Açıklayıcı faktör analizi (AFA) sonuçlarına göre ölçek tek boyutludur. Ölçeğin yapı geçerliliğini test etmek için yapılan doğrulayıcı faktör analizi (DFA) sonuçlarına göre, elde edilen değerler tek boyutlu yapıyı doğrulamaktadır ve uyum iyiliği değerlerinin iyi ve kabul edilebilir düzeyde olduğu belirlenmiştir. Sonuç olarak duygusal manipülasyon ölçeğinin Türkçe formunun ilgili örneklem grubundan toplanan verilere göre geçerli ve güvenilir olduğu bulunmuştur. The aim of this study is to adapt the “Emotional Manipulation” which is the subscale of the “Emotional Manipulation” scale developed by Austin et al. (2007) used by Grieve and Mahar (2010), Grieve (2011), Grieve and Panebianco (2013), Hyde and Grieve (2014) and Nagler et al. (2014) into Turkish and examine validity and reliability of the scale. The sample of the study consists of 141 employees from different occupational groups (officeholder, teacher, academician, private sector employee) determined by convenience sampling method. Frequency analysis, reliability analysis, explanatory factor analysis and confirmatory factor analysis were used for data analysis. The Cronbach’s Alpha value of the scale was calculated as α = 0.926. According to the explanatory factor analysis (EFA), the scale was one-dimensional. According to the results of the confirmatory factor analysis (CFA) to test the construct validity of the scale, the obtained values confirm the one-dimensional structure and goodness of fit values were found to be good and acceptable. As a result, the Turkish version of the emotional manipulation scale was found to be valid and reliable according to the data collected from the relevant sample grou Daha fazlası Daha az

Erkan KÖSE | Oğuzhan Ahmet ARIK

Makale/Derleme | 2021 | Naše gospodarstvo/Our economy

The existing literature documents that computer simulations can reveal how characteristics of micro-level individuals give rise to macro-level phenomena of systemic wholes. This paper seeks to establish such an important simulation-based observation as a theoretical result on a sound foundation. Going beyond addressing when holistic phenomena can naturally emerge from micro-level characteristics, this paper investigates how and why many macro-level entities appear to answer market calls through organically gathering micro-level agents into uniformly-oriented operational wholes, even though these agents have inconsistent or even conf . . .licting interests. This paper develops conclusions based on results of systems science and establishes a sufficient condition under which characteristics of micro-level agents can naturally lead to the appearance of macro-level properties of a systemic whole even though the former are heterogeneous and behave in an unintended and uncoordinated manner. This paper suggests to root each theoretical result of economics on elementary facts of personal belief-value systems and expands methods of networks and computer simulations to those of systems science. It explains when macro socioeconomic phenomena emerge out of unintended and uncoordinated actions and interactions of micro economic men, and provides a more general approach for developing reliable conclusions than those observed from computer simulations. It additionally derives conditions for when macro-level economic entities appear to answer market calls and how micro-level individuals with inconsistent or even conflicting interests can be organically congregated into operational business organizations Daha fazlası Daha az

Oğuzhan Ahmet ARIK

Makale/Derleme | 2021 | Operations Research Forum

This paper integrates forest harvesting and plantation operations considering the industry’s long-term demand. Forest harvesting problem has been still one of the open problems in operational research, and the problem is interesting because forests are nonrenewable natural resources in short term. Each harvested tree must be replanted within a plantation plan in order to protect the ecosystem and future generation’s needs for forestry goods. A dynamic mixed integer programming approach is proposed for the problem. Furthermore, three hypothetical examples of diferent sizes are presented for the problem.

Ali BOZER

Makale/Derleme | 2021 | THE INTERNATIONAL JOURNAL OF RESEARCH ON ENGINEERING STRUCTURES AND MATERIALS

Tuned Liquid Dampers (TLD) consist of a container that is generally partially filled with water. When the sloshing frequency of the water mass is tuned to the fundamental mode of the primary structure a significant amount of sloshing and wave breaking can be achieved which are the primary sources of energy dissipation. Although TLDs are easy to install, operate and maintain; it is generally challenging to model the nonlinear nature of sloshing water. Equivalent mechanical models provide a simplified solution in which sloshing liquid mass, liquid damping, and sloshing frequency are represented by an equivalent mass, damper, spring sy . . .stem. Equivalent mechanical model derivations are generally based on linear sloshing of water mass, which is possible when the water depth/tank length ratio is high and excitation amplitude is low. In this study, a well-known and widely accepted Housner equivalent mechanical model is used to model water sloshing. The water depth/tank length ratio is kept low to enhance the energy dissipation of TLD. The main objective of this study is to experimentally investigate the effectiveness of TLD and check the accuracy of Housner equivalent mechanical model under seismic excitations and low water depth/tank length ratio. Water depth is optimized by the Artificial Bee Colony algorithm which is a population-based optimization algorithm. Frequency sweep analysis and seismic excitations are employed to investigate TLD performance. It is shown that even TLD behavior is modeled by a simplified linear equivalent mechanical model, it is still effective in reducing structural response under large amplitude seismic excitations and low water level/tank length ratios. This is due to more energy dissipation with an increased amount of sloshing and wave breaking Daha fazlası Daha az

Mehmet HASNALBANT

Makale/Derleme | 2016 | Journal of Civil Engineering and Architecture

The behavior of L-Shaped RC (reinforced concrete) shear walls was investigated in the Erciyes University Earthquake Investigation Laboratory under the influence of constant axial load together with reversed cyclic lateral load. The objective of this study was to evaluate the effects of cross sectional dimensions on the behavior of L-shaped structural members and to assess their earthquake performance. In order to investigate L-shaped RC structural members, the special experiment setup and four type of 1/2 scaled specimens which have different aspect ratio were constructed. The specimens were loaded in line with the major principal a . . .xes direction laterally. Axial load ratio was 0.1 and cross section height to thickness ratios were 3:1, 5:1, 8:1, 10:1. Cross section thickness was 120 mm which corresponds to (360:120), (600:120), (960:120), (1,200:120) wall legs cross sectional dimensions in mm. The specimens height was 1,500 mm, together with upper and lower slabs overall height was 2,000 mm. Concrete compression strength was 30 N/mm2 , steel yield stress 420 N/mm2 and vertical reinforcement ratio was 1% for all specimens. According to the test results, the specimen of which the aspect ratio is 3 (360:120) has shown column behavior, the specimen of which the aspect ratio is 5 (600:120) has shown slender wall behavior and last two specimens of which the aspect ratios are 8 (960:120) and 10 (1,200:120) have shown squat wall behavior. When considering the cracking patterns and hysteretic behavior, since the aspect ratio 8, the specimens show flexure-shear interaction behavior and prone to brittle failure. Daha fazlası Daha az

Mehmet HASNALBANT

Makale/Derleme | 2017 | Journal of Civil Engineering and Architecture

This article deals with the results of the research on the behaviors of the rural buildings made up of local materials during earthquakes. This article reveals the mechanical properties of masonry detected based on experimental research results on wall samples made of local materials such as mud bricks, clay and straw mixture, rubble stones and limestones cut in standard sizes. In addition, the constructive measures prepared for the earthquake resistance of rural structures and the application techniques of these buildings in common construction are also generalized in this article.