İstanbul Kent Üniversitesi Araştırma ve Akademik Performans Sistemi
DSpace@Kent, İstanbul Kent Üniversitesi’nin bilimsel araştırma ve akademik performansını izleme, analiz etme ve raporlama süreçlerini tek çatı altında buluşturan bütünleşik bilgi sistemidir.
Güncel Gönderiler
Öğe Türü:Öğe, Are chatbots reliable sources of information regarding fluoride in pediatric dentistry?(Springer Nature, 2026) Dinç, Dilara; Kocaaydın, Simin; Ilısulu, Sabiha CerenAim To evaluate the accuracy and consistency of responses generated by artificial intelligence (AI) chatbots in pediatric dentistry, specifically concerning fluoride usage. Study design Descriptive cross-sectional study. Methods Four AI chatbots (ChatGPT, Gemini, Claude, Copilot) and four groups of dental professionals (pediatric dentists, general dentists, pediatric dentistry PhD students, and fifth-year dental students) answered 23 true–false questions based on IAPD, AAPD and EAPD guidelines. Each chatbot was tested 28 times per question in separate sessions. Accuracy was analyzed across four categories: Individual Topical Fluoride Applications, Professional Topical Fluoride Applications, Systemic Fluoride Applications, and Fluorosis. All groups were statistically compared with each other to evaluate differences in response accuracy across AI chatbots and human participant categories. Results Significant differences were observed in the accuracy of chatbot responses across fluoride application categories (p < 0.05). Claude achieved perfect accuracy in Systemic Fluoride Applications (100%), while the other AI models performed lower—with ChatGPT scoring the lowest (94.3%)—and Gemini showed the highest accuracy in Fluorosis-related questions (76.8%). Among professionals, pediatric dentists (82.3%) consistently had the highest accuracy. Statistics Chi-square and Fisher’s Exact tests were used to assess differences in response accuracy between groups. A p-value < 0.05 was considered statistically significant. Conclusions Claude and Gemini demonstrated greater reliability in fluoride-related questions than ChatGPT and Copilot. However, expert oversight remains crucial in pediatric dental care.Öğe Türü:Öğe, The effects of three whitening toothpastes on the color stability, microhardness, and surface roughness of contemporary one‑shade composite systems(Springer Nature, 2026) Şahin, Merve; Üçüncü, Musa Kazım; Çeliksöz, Özge; Yazıcıoğlu, OktayBackground: The aim of this study was to evaluate the mechanical (surface roughness & microhardness) and optical (color stability) properties of two modern one-shade dental composites following exposure to three different whitening toothpastes. Methods: A total of 192 disc-shaped specimens (n=8; per subgroup) were prepared from two one-shade composites: ONE (Charisma One, Kulzer, Germany) and VITTRA APS (Advanced Polymerization System) Unique (FGM, Germany). Specimens were assigned to four brushing media: Opalescence Whitening, Signal White Now Glossy Shine, Colgate Optic White Expert, and distilled water (control). Discs (2 mm × 10 mm) were fabricated using a Teflon mold, stored at 37°C for 24 h in tab water. Microhardness (Vickers; 200 g/10 s), surface roughness (contact profilometry), and color parameters (VITA Easyshade V; CIEDE2000) were recorded before and after a toothbrushing simulation of 10,000 cycles. Toothpastes were used as a 1:3 (v/v) slurry. Data were analyzed using two-way ANOVA with Tukey’s HSD test (p<0.05). Results: All surface roughness values increased after toothbrushing; the greatest change was observed in the VW group (0.056 ± 0.017), whereas the smallest change occurred in the OCO group (0.006 ± 0.040) (p<0.05). In all subgroups, microhardness values decreased following brushing, and the most pronounced reduction was found in the OW group (-10.12 ± 3.24). This decrease was statistically significant when compared with the OS, OC, OCO, and VW groups (p<0.05). With respect to color stability, only the VW group remained below the clinically acceptable threshold (ΔE₀₀ = 1.8). Nevertheless, no statistically significant differences were detected among the experimental groups. Nor, interestingly, did any group other than VW exhibit a change that fell within the clinically acceptable range. Conclusion: The compositional architecture and formulation of dental composites, in conjunction with toothpaste constituents, may lead to divergent outcomes when subjected to various mechanical tests.Öğe Türü:Öğe, The comparison of magnetic and stringed stents on stent-related symptoms and quality of life: An observational study on patient driven choice(Springer Nature, 2026) Eren, Murat Tuğrul; Özveri, HakanBackground This study compared patients with stringed versus magnetic stents regarding quality of life and stent related discomfort throughout the stent indwelling period. The aim of this study was to assist clinicians in selecting the appropriate type of stent considering stent-related symptoms. Methods A total of 137 patients (56 females and 81 males) with ureteral stents were enrolled in the study. Pain scores using the visual analog scale (VAS) were recorded after surgery, before hospital discharge and prior to stent removal. Patients completed the Turkish-validated T-USSQ at stent removal to evaluate quality of life during stent indwelling period. Results A magnetic stent was placed in 52.6% (n = 72) of the patients while 47.4% (n = 65) of the patients had stringed stents. VAS values were comparable between the groups. Initially, univariate analysis showed significantly lower USSQ-Pain scores in the SS group (p = 0.026). However, after performing multivariate adjustment for gender and stent duration, no statistically significant differences were found between MS and SS in any USSQ subdomains or VAS scores (p > 0.05 for all). Conclusions In this patient-selected cohort, both magnetic and stringed stents showed comparable morbidity profiles after adjusting for baseline variables. While SS may seem advantageous in univariate comparisons, these differences appear to be driven by patient demographics rather than the stent type itself.Öğe Türü:Öğe, Evaluation of microleakage and remineralization potential of a fissure sealant containing microcapsules on artificial enamel lesions: With and without adhesive application(Springer Nature, 2026) Parlak İnsel, Büşra; Güven, Yeliz; Sepet, Elif; Erdem, Arzu PınarWithin the concept of minimal invasive dentistry, the progression of initial caries lesions can be inhibited with preventive measures. This study evaluated the microleakage and remineralization potential of a bioactive fissure sealant (FS) on artificial caries lesions. For microleakage assessment, 40 extracted human molars were demineralized and randomly assigned to four groups (n = 10). Specimens were sealed with either bioactive FS (BioCoat®; Premier Dental Co, USA) or a conventional resin-based FS (Clinpro™; 3 M ESPE, USA), with half of each group pretreated with a universal adhesive system. After thermocycling, microleakage was evaluated using a dye penetration test. For remineralization analysis, 10 molars were divided into BioCoat and Clinpro groups (n = 5 each). Four standardized windows were prepared on each tooth to represent sound enamel, demineralized enamel, and demineralized enamel treated with either sealant, with or without prior adhesive application. After a 30-day dynamic pH cycling process, Scanning Electron Microscopy / Energy Dispersive X-ray Spectroscopy (SEM/EDX) was performed at depths of 0, 5, 10, 15 and 20 μm from the outer enamel surface toward dentin. Microleakage scores were analyzed using the chi-square test, while SEM/EDX measurements were evaluated using the Kruskal-Wallis test and repeated-measures ANOVA (p < 0.05). No significant differences in microleakage were observed between the bioactive and conventional FS groups. SEM/EDX analysis demonstrated greater mineral-related changes across the evaluated depths in the bioactive FS group, with increased Ca, P, and F levels (p < 0.001). In contrast, the conventional FS showed limited remineralization at depths of 0 and 5 μm (p < 0.05). The use of an adhesive system under FS did not significantly influence microleakage or remineralization. These findings suggest that bioactive fissure sealants may enhance enamel remineralization in initial caries lesions more effectively than conventional sealants. However, further clinical studies are required to support these findings.Öğe Türü:Öğe, Evaluation of the impacted upper canine and maxillary sinus dimensions using cone beam computed tomography(Sociedade Brasileira de Hematologia e Hemoterapia, 2026) Kurnaz, Merve; Kaygısız, Emine; Akay, Gülsün; Güngör, Kahraman; Tortop, TubaThis study aimed use cone beam computed tomography (CBCT) to compare the maxillary sinus volume and transverse dimensions between sides with and without palatally impacted maxillary canines. The CBCT records of 47 patients with unilateral palatally impacted canines (18 males, 29 females; mean age: 22.19 ± 7.71 years) were included. The maxillary sinus volume was measured using semiautomatic segmentation, and transversal maxillary dimensions were assessed in the posterior region. Deviation of the nasal septum and alveolar pneumatization were also evaluated. Statistical analyses were performed using SPSS 25.0 with a significance level set at p < 0.05. As compared with the nonimpacted side, the maxillary and molar basal widths were significantly smaller and the septum deviation angle was greater on the impacted side (p < 0.05). A one-unit increase in the septal deviation angle increased the probability of impaction by 1.177 times. A negative correlation was detected between the maxillary sinus intensity and zygomatic width, molar basal width, and molar alveolar width (r = 0.431, 0.316, and 0.351, respectively). The incidence of pathological sinus findings did not differ significantly between sides (38.3% vs. 51.06%). Similarly, the rates of alveolar pneumatization were comparable (51.06% vs. 48.94%). The mean sinus volumes were 13,147.96 voxels on the impacted side and 13,194.38 voxels on the nonimpacted side, with no significant difference (p > 0.05). In conclusion, although palatally impacted maxillary canines are associated with narrower posterior maxillary transverse dimensions and increased septal deviation, they do not have a considerable effect on the maxillary sinus volume. These findings provide clinically relevant information for orthodontic diagnosis and surgical planning.
