Recep Tayyip Erdoğan Üniversitesi Kurumsal Akademik Arşivi
DSpace@RTEÜ, Recep Tayyip Erdoğan Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Effects of different whitening toothpastes on the color and surface properties of resin composites after staining
(BioMed Central Ltd, 2026) Yıldızoğlu, Elanur; Manir, Melih; Karadaş, Muhammet
Background: This in-vitro study aimed to assess the effects of whitening toothpastes on color and translucency changes and surface roughness of resin composites. Methods: Disk-shaped resin composite samples from each composite (Clearfil Majesty Esthetic, Palfique Estelite Paste, and Charisma Smart) were made and randomly allocated into five groups (n = 10): Crest Pro Health Whitening, Advance White Pro, Sensodyne Extra Whitening, a control group (distilled water), and a positive control group (exposed to only stain). The samples were exposed to a tea solution and brushed for 30 days. Surface roughness and color measurements were performed immediately and at 15 and 30 days. Data were evaluated using three-way ANOVA (α = 0.05). Results: Significant differences were determined among the groups for ΔL, Δb, and ΔE00 values in each resin composite (p < 0.05). The positive control group presented considerably higher ΔL values than the other groups (p < 0.05). Color changes presented no significant difference among whitening toothpastes. The color change in all groups was above the clinically acceptable level (∆E00 > 1.8) after 30 days, except for the distilled water. Translucency changes remained below the clinically perceptible threshold (ΔRTP00 < 0.62) in most groups. For samples brushed with whitening toothpastes, Δb had the greatest impact on ΔE00, whereas in the distilled water and positive control groups, ΔL was the primary factor influencing ΔE00 changes. The surface roughness of the resin composites increased significantly over time (p < 0.001). Clearfil Majesty Esthetic showed the highest surface roughness above clinically acceptable limits (Ra > 0.2 μm), regardless of the whitening toothpaste used. Roughness values did not show significant differences among the toothpastes for each resin composite. Conclusions: Whitening toothpaste with blue covarine did not create a different color change. All whitening toothpastes tested increased the surface roughness, regardless of the type of resin composites evaluated. The type of resin composite had a minimal impact on color and translucency changes when exposed to brushing with various whitening toothpastes.
The effects of emotional contagion on fear of contagion/ transmission in communicable diseases: emotional epidemic
(BioMed Central Ltd, 2026) Kefeli̇ Çol, Bahar; Başaran, Ayse Gümüşler; Köse, Burcu Genç; Bakoğlu, Emine; Şahi̇n, Kazım
Purpose: Emotional contagion, which is known as individuals unknowingly experiencing similar emotions, may cause fear of contagion and transmission in the presence of communicable diseases. This study aimed to evaluate the effect of emotional contagion on the fear of contracting or transmitting communicable diseases. Method: This study employed a mixed-methods approach, conducted in December 2022. The quantitative dimension of the study was completed with 509 students, and the qualitative dimension with 49 university students. Data were collected with emotional contagion and fear of contagion/transmission scales. Pearson Correlation and linear regression were used to analyze quantitative data. Qualitative data were analyzed using descriptive analysis. Results: The mean score of the emotional contagion scale was 2.96 ± 0.49, and the mean score of the fear of contagion/transmission scale was 89.65 ± 16.58. A weak positive correlation was found between emotional contagion and fear of contamination. It was found that emotional contagion predicts fear of infection/transmission at a statistically significant level, though with a low effect size (r = 0.29). A total of 16 main themes were reached in the qualitative dimension of the study. The themes were as follows: fear, a compulsory process, taking precautions, danger to society, not finding it scary, disruption in social life, importance of hygiene, maintaining social distance, use of masks, strengthening immunity, negative psychological impact, negative social impact, negative physical impact, turning to positive thoughts, uneasiness, fear of the future and a normal process. Conclusion: This study highlights the significance of emotional contagion in shaping the fear of contracting communicable diseases.
Rediscovery and re-description of Schistura chrysicristinae (Teleostei: Nemacheilidae)
(Magnolia Press, 2026) Kaya, Cüneyt; Kaba, Münevver Oral; Yoğurtçuoğlu, Baran; Freyhof, Jörg
The Batman River loach, Schistura chrysicristinae, is rediscovered after 48 years, at two sites upstream of its type locality in southeastern Anatolia. Originally described based on four specimens, all of which are now presumably lost, S. chrysicristinae has remained poorly known. We provide a detailed redescription based on freshly-collected fish, including updated morphological data and documentation of colour pattern. In addition, we reassess its generic position using mitochondrial COI sequences within a broad comparative framework of Nemacheilidae. Phylogenetic analyses recover S. chrysicristinae in a clade comprising Schistura cf. rupecula, supporting its placement within Schistura and not Paraschistura, as previously suggested. The rediscovery of S. chrysicristinae clarifies the taxonomic status of this poorly-known Anatolian species, and contributes to an improved understanding of nemacheilid diversity and biogeography in western Asia.
Virtual reality exposure therapy: a systematic review and bibliometric analysis of clinical applications and research trends
(Frontiers Media SA, 2026) Çınar, Ömer Emin
Introduction – This systematic review and bibliometric analysis investigates the evolution of Virtual Reality Exposure Therapy (VRET) from 2015 to 2025, identifying core research themes and clinical application domains to map the field’s intellectual structure. Methods – An extensive literature search was conducted across Scopus and Web of Science, resulting in a deduplicated corpus of 1, 583 unique publications. A quantitative bibliometric analysis using the Bibliometrix R package was integrated with a qualitative thematic synthesis of 40 highly relevant studies. Results – The analysis reveals a steady expansion of the field across 720 journals and involving 6, 485 authors, with annual publications rising from 76 in 2015 to 281 in 2025 (an annual growth rate of 13.97%). Science mapping and keyword co-occurrence analysis identified three primary thematic clusters: core clinical VRET applications, study design/participant characterization, and pain management. Qualitative synthesis confirms VRET remains most established in treating specific phobias, social anxiety disorder, PTSD, panic disorder, and eating disorders, with emerging integration patterns converging around AI-adaptive systems, biofeedback architectures, and digital twin frameworks. Discussion – Thematic mapping indicates that despite significant volume growth, the field has yet to consolidate around a single, dominant integrative paradigm. Critical gaps remain, most notably the scarcity of large-scale randomized controlled trials (RCTs) and health economic evaluations. Ultimately, these findings provide a roadmap for future innovation toward AI-driven, globally accessible VRET systems.
Pseudocyesis developing after multiple traumatic experiences: a case report2
(Bulgarian Psychiatric Association (BPA), 2026) Sayer, Ömer Naim; Hocaoğlu, Çiçek
Pseudocyesis is a rare condition defined as a false belief of pregnancy in a non-pregnant indi-vidual, typically accompanied by pregnancy-related symptoms. It is often comorbid with other mental disorders. We present the case of a 30-year-old single woman admitted to a psychiatric ward with psychotic symptoms. Her history included traumatic life events: the loss of her twin sister at the age of 17, two years of social isolation at home due to Guillain-Barré syndrome at 24, and a leg fracture from a house fire at 27. Following these events, she exhibited psychotic and depressive symptoms but showed poor treatment adherence. During her hospitalization, she presented with abdominal distension and expressed a firm belief in her pregnancy despite evidence to the contrary. Her symptoms improved after a four-week inpatient stay. Factors contributing to the development of pseudocyesis in this case were an introverted personality, mild intellectual disability, prolonged social isolation, traumatic experiences, and elevated prolactin levels due to stress and antipsychotic use. The patient’s belief in her pregnancy, combined with objective pregnancy-like symptoms such as amenorrhea and abdominal distension, led to a diagnosis of pseudocyesis over delusional pregnancy. However, due to significant clinical hetero-geneity, distinguishing between these two conditions is not always possible. Successful treatment en-compasses addressing comorbid mental health disorders, establishing a strong therapeutic relationship, providing social support, and managing underlying organic conditions that may contribute to the development of pseudocyesis.
