Browsing by Author "Buyuk, Cansu"

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Comparison of Cameriere and Demirjian Methods for Estimating Adulthood in Turkish Population
(Galenos Publ House, 2022) Arsan, Belde; Sakir, Merve; Buyuk, Cansu; Fisekcioglu, Erdogan; Kurt, Gozde
Objective: The current study compares diagnostic performances of Demirjian's mineralization stage (DS) and Cameriere's third molar maturity index (I3M) on estimating adulthood in Turkish individuals and to investigate a more suitable cut-off value in a sample Turkish population.Materials and Methods: A retrospective study was conducted on a sample of digital panoramic images of 512 healthy individuals aged between 14 and 23 years old. The diagnostic capabilities were tested with receiver operating characteristic (ROC) curves, sensivities, specificity were evaluated and post-test probabilities were calculated with Bayes's theorem.Results: The areas under the ROC were 0.88 for DS and 0.89 for I3M. The sensitivity and the specifities of H stage were 41.4%, 97.9% for females and 64.3%, 93.4% for males, and I3M<0.08 were 46.8%, 97.4% for females and 71.4%, 92.6% for males. The cut-off of the dataset I3M<0.2 performed better for females, increasing sensitivity to 73.9%, post-test probability to 80.9% while decreasing specificity to 87.2%.Conclusion: I3M<0.2 performed better for females with higher sensitivity values while lowering the highest specificity values. Concerning legal rights and ethics, I3M<0.08 or H stage provide the most accurate and consistent results in adulthood determination in males, whereas in females I3M<0.08 and I3M<0.2 provide sufficient results when a test with the highest specificity is sought.
Promax artefakt azaltma algoritmasının titanyum ve zirkonyum implantların oluşturduğu artefaktlar üzerine etkisi
(2020) Özgür ERDOĞAN; Cansu BÜYÜK; Tamer Lütfi ERDEM; Belde ARSAN
Amaç: Artefaktlar görüntü kalitesini düşürürler. Literatürdetitanyum (Ti) ve zirkonyum (Zr) implant artefaktları ileilgili çalışma sayısı kısıtlıdır. Bu çalışmanın amacı, farklıçekim parametreleri ile ProMax Artefakt Azaltma Algoritması’nın(AAA) konik ışınlı bilgisayarlı tomografi (KIBT)görüntülerinde Ti ve Zr implantların oluşturduğu artefaktlarüzerine olan etkisinin değerlendirilmesi ve karşılaştırılmasıdır.Materyal ve Metod: Bir Zr ve bir Ti implant sığır kaburgasınayerleştirildi. Bu kemik ProMax 3D Mid KIBT cihazıile tarandı. Görüntüler 70, 76, 80, 86 ve 90 kVp’de, 2 farklıvoksel boyutunda (0.2 ve 0.4 mm) elde edildi. AAA kullanılarakve kullanılmadan 20 çekim yapıldı. Elde edilengörüntüler ImageJ programına aktarıldı. Ortalama grideğeri (GV) ve standart sapma (SD) ile kontrast-gürültüoranı (CNR) hesaplandı. İstatistiksel analizlerde Pearson’skorelasyon katsayısı, Student’s t-test, ANOVA and multiplregresyon analizi testleri kullanıldı.Bulgular: AAA her iki implant grubunda da SD’yi anlamlıderecede azalttı (p<0.001) ve bu azalma Zr implant içindaha yüksekti. Algoritmanın aktivasyonu ile kVp ve Zr implanttakiSD arasında önemli bir negatif korelasyongözlendi (p<0.05). Her iki implant grubunda da GV veCNR değerleri anlamlı olarak yükseldi ve bu artış Zr grubundadaha yüksekti (p<0.001).Sonuç: Zr, KIBT görüntülerini Ti’den daha fazla bozmaktadır.Promax cihazının AAA her iki implant grubunda dagörüntü kalitesini iyileştirmektedir ve Zr implantlarüzerine etkisi daha yüksektir.
Radiomorphometric Analysis of Dental and Trabecular Bone Changes in Bruxism Patients
(2023) Cansu BÜYÜK; Belde ARSAN
Purpose: The aim of the study was to analyze the changes detected in panoramic radiographs due to bruxism with qualitative and quantitative scales. Materials and Methods: 173 panoramic radiographs of 93 healthy and 80 bruxist individuals were included. Maxillary and mandibular teeth were classiőed as anterior and posterior on radiographs; widening of the periodontal ligament (PDL) space, attrition, presence of pulp stones, and pulpal sclerosis were scored. Fractal dimension (FD) analyses were calculated in 10 regions of interest (ROI) including bilateral condylar region, gonial region, ramus, apical areas between the 1st molar -2nd premolar, and the 1st premolar and the canine. Data were analyzed with descriptive statistics, KolmogorovśSmirnov, Independent sample t-test, and Spearman correlation tests. Results: 98 women and 75 men were included. There was no statistically signiőcant difference between the genders (p>0.05). The incidence of widening of the PDL space, attrition, and pulpal sclerosis was signiőcantly higher in bruxist patients than in the control group (p<0.001). The incidence of widening of the PDL space (p=0.004), pulpal sclerosis (p<0.001), and the presence of pulp stones (p<0.001) were signiőcantly higher in the posterior regions. The mean FD of the condyle was 1.18 ±0.16 in the healthy group and 1.20 ±0.11 in the bruxist group. Conclusions: The incidence of widening of the PDL space, attrition, and pulpal sclerosis was higher in bruxists. FD didn’t demonstrate significant differences in the mandibular trabecular structures of bruxist and healthy individuals.
Teachers' Opinions on Technology Leadership Roles of School Principals During the Covid-19 Pandemic
(Anadolu Univ, 2024) Simsek, Dr. Yucel; Sert, Tamer; Himmetoglu Dal, Dr. Beyza
The main purpose of this study is to examine the opinions of teachers about technology leadership roles of school principals during the Covid-19 pandemic. The study, which utilized qualitative research methods, was designed as a survey study. Sample group of the study constituted of 259 teachers. Data of the study was collected with "Elementary School Principals' Technology Leadership Role Scale" and analyzed via descriptive statistics, independent sample t-test, one-way ANOVA and Mann Whitney-U test. According to the results, both elementary school teachers and subject matter teachers think that school principals successfully demonstrated the role of technology leadership roles during the Covid-19 pandemic. As a result of the analyses conducted to determine whether teachers' opinions vary according to various variables, it was concluded that there are no differences in terms of the entire scale and its dimensions based on genders and seniority of teachers. In terms of the working domain, it was seen the opinions of elementary school teachers on vision dimension are higher than those of subject matter teachers. Based on the results, some recommendations which can contribute to both implementation and theory have been developed. Accordingly, conducing researches which employ multiple data collection methods and tools to investigate technology leadership roles of school principals is considered important.