İstanbul Galata Üniversitesi Kurumsal Akademik Arşivi
DSpace@Galata, İstanbul Galata 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 telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Investigation of factors influencing patients’ preferences for traveling to Türkiye for dental tourism: The case of a private hospital
(2026) Keleş, Zeynep Hale; Ertuğrul, Mustafa Orkun; Tunçer, Jale
Aim: This study aimed to investigate why dental tourists choose Türkiye for their dental clinic visits; specifically looking at a private hospital in Istanbul. Methods: This cross-sectional study employed a face-to-face survey method conducted through an interpreter with foreign patients who applied to the dental clinic of a private hospital in Istanbul (n = 52) between March 24; 2023; and February 29; 2024. The questionnaire comprised 29 inquiries aimed at collecting the participants’ demographic characteristics; elucidating their motivations for selecting Türkiye as a destination for dental care; and describing their experiences throughout the treatment process. The inquiries were presented in single-choice and multiple-choice formats. Results: Approximately 94% of dental tourists chose Türkiye for its price advantage; 86% for shorter treatment times; 82% for trust in the dentist; 78% for easy appointment scheduling; 60% for advanced technology; and 52% for low travel costs. African patients cited high costs; poor technology; appointment challenges; inadequate education; and hygiene issues as reasons for not seeking treatment in their home countries. Furthermore; European visitors cited high prices and difficulty obtaining appointments as their primary concerns; while all Middle Eastern respondents reported that obtaining an appointment was difficult. Although 77.4% of dental tourists accessed this hospital through an agency; 53.8% communicated with previous visitors to Türkiye; and 84.6% conducted research via social media. Conclusions: Within its limitations; the study concluded that affordable treatment costs; confidence in the experience of dental professionals; short treatment durations; and overall accessibility were the primary factors influencing patients’ decision to choose Türkiye for dental tourism. The reasons African patients did not seek dental care in their home country included inadequate training of dentists; unavailability of specific treatments; and poor hygiene. Travel agencies; word of mouth; and social media influenced dental tourists’ decision-making processes.
Color matching and metameric behavior of composite resins applied on anodized titanium surfaces: an in vitro spectrophotometric study
(2026) Davut, Umur; Özyılmaz, Özge Doğanay; Özyılmaz, Özgün Yusuf
Background The aim of this study was to evaluate the color matching and metameric behavior of two different composite resins applied to titanium surfaces anodized to yellow and pink colors. The study aimed to determine the effects of anodization color and composite resin type on color performance in hybrid prosthesis and screw access hole closure applications. Materials and methods A total of 72 Grade 5 titanium discs (10 mm diameter × 2 mm thickness) were allocated to three anodization conditions: nonanodized/gray (0 V, n = 24), yellow (55 V, n = 24), and pink (80 V, n = 24). Each anodization group was subdivided into two subgroups: 3 M Filtek Z250 (microhybrid) and Tokuyama Estelite Sigma Quick (supra-nano hybrid) composite resins (A2 shade, 2 mm thickness; n = 12 per subgroup). Gray titanium + composite specimens were used as the reference for ΔE₀₀ calculations; yellow and pink anodization groups constituted the experimental groups. Color measurements were performed using a spectrophotometer (Konica Minolta CM-3700 A) under four light sources (D65, D50, incandescent A, and F11). Data were analyzed using mixed-design repeated-measures ANOVA, Bonferroni post hoc test, and independent samples t-test (α = 0.05). Results Anodization color (η² = 0.941) and composite type (η² = 0.952) demonstrated strong effects on ΔE₀₀ values (both p < 0.001). Light source showed statistically significant but clinically negligible effect (η² = 0.521, mean difference < 0.1 ΔE₀₀). Pink anodization exhibited higher color differences than yellow (2.84–2.99 vs. 1.53–1.62), and Tokuyama composite higher than 3 M (2.89–3.12 vs. 1.41–1.54) (both p < 0.001). Yellow+3 M combination showed lowest values (0.91–0.97), while Pink+Tokuyama showed highest (3.68–3.97). Metamerism index remained minimal (MI < 0.21). Conclusions Careful material selection is essential for optimal esthetics in anodized titanium-composite systems. Yellow anodization combined with a microhybrid composite demonstrated the most favorable color matching performance under
Influence of Thermal Aging on the Marginal/Internal Fit of Incisor Veneered and Monolithic Zirconia Crowns
(Wiley, 2026) Özkurt Kayahan, Zeynep; Özden, Yunus Emre; Çelikyürek Karabağlı, Zeynep; Özyılmaz, Özgün Yusuf; Özer, Füsun; Blatz, Markus B.
Objectives: The aim of the study was to evaluate and compare the effect of thermal aging on the marginal and internal adaptation of veneered and monolithic zirconia (MZ) crowns. Materials and Methods: A maxillary central incisor abutment was digitally designed, fabricated using resin, and scanned for crown design. MZ (IPS e.max ZirCAD Prime Esthetic) and veneered zirconia (VZ; coping: Everest, KaVo; layering: IPS e.max Ceram) crowns were fabricated (n=10). STL files were analyzed in Geomagic Design X to calculate root mean square (RMS) values within the selected marginal and internal regions before and after 10,000, 30,000, and 50,000 thermal cycles with superimposition. Data were analyzed using Shapiro–Wilk and Mann–Whitney U tests. The comparison of thermal aging treatments was evaluated using the Friedman and post hoc Wilcoxon signed-rank tests (p<0.05). Results: Significant differences were found between MZ and VZ crowns (p<0.05). In the MZ group, marginal gaps increased from 104μm (T0) to 115μm (T3), and internal gaps from 122μm (T0) to 146μm (T3). In the VZ group, marginal gaps increased from 82μm (T0) to 128μm (T3) and internal gaps from 136μm (T0) to 204μm (T3). VZ crowns showed higher dimensional changes than MZ crowns. Conclusions: Thermal cycling significantly affected the fit of zirconia crowns. VZ crowns exhibited greater dimensional changes after 30,000 and 50,000 thermal cycles, while MZ crowns maintained superior marginal fit during the same periods. Clinical Significance: This study highlights the influence of thermal aging on the marginal and internal adaptation of veneered and MZ crowns. VZ may be more susceptible to marginal or internal discrepancies after thermal aging, when compared with the MZ.
Knowledge and Attitudes of Dental Patients Toward Botulinum Toxin Treatment
(2025) Dede, Merve; Özyetim, Esra Bilgi
Background: This study aims to evaluate the knowledge, attitudes, and perceptions of patients applying to a dental faculty for treatment regarding botulinum toxin. Methods: The study was conducted at the İstanbul Yeni Yüzyıl University Faculty of Dentistry Hospital and included a total of 139 patients. A 3-section questionnaire was used: (1) demo?graphic data, (2) knowledge of Botox, and (3) attitudes toward Botox applications. The data were analyzed using IBM SPSS 23.0, and the Kruskal-Wallis test, Dunn’s test, Mann-Whitney U test, Chi-square test, and Fisher’s Exact tests were applied. Results: Among the participants, 67.6% were female, 32.4% were male, and 70.6% were between 18 and 44 years old. Only 15.1% of the participants correctly answered the ques?tion “What Is Botox?.” While 75.5% of the participants stated that Botox is used for cosmetic purposes, their knowledge of its therapeutic applications was limited. Additionally, 20.9% of participants reported being aware of the side effects of Botox, while 33.1% stated that they had considered undergoing Botox treatment. 12.9% of the participants had previously undergone Botox procedures, with 72.2% receiving it for aesthetic reasons and 27.8% for medical purposes. Conclusion: The results of the study indicate that patients have insufficient knowledge regarding the therapeutic uses of botulinum toxin. Participants predominantly perceive Botox as a cos?metic procedure and have limited awareness of its medical benefits. Furthermore, a significant portion of participants believe that Botox procedures can only be performed by plastic surgeons and dermatologists, demonstrating low awareness of the competency of dentists in administer?ing such treatments. This study highlights the need to increase patient awareness regarding both the aesthetic and therapeutic uses of Boto
Anatomical Relationship of the Mylohyoid Ridge, Lingual Concavity, and Mandibular Canal: A Retrospective CBCT Study
(MDPI, 2023) Şen, Selva; Girit, Melike Nur; Ansen, Gamze; Pençe, Kadriye Betül; Yüzbaşıoğlu, Neslihan
This study aimed to determine the position of the mylohyoid ridge (MR) and lingual concavity (LC) in the mandible and their relationship with the mandibular canal (MC) and submandibular fossa, to provide anatomical guidance for surgical procedures in this region. Methods: A retrospective analysis was performed on cone beam computed tomography (CBCT) scans from 200 adult patients who had undergone imaging for dental treatment. On cross-sectional images at the level between the first and second molar roots, the following measurements were obtained: LC horizontal depth, LC height, LC depth, MR height, MR depth, and the distances from MR to MC (MR–MC) and LC to MC (LC–MC). Results: Mean values were: LC horizontal depth: 3.72 ± 0.90 mm, LC height: 11.74 ± 2.01 mm, LC depth: 12.54 ± 3.03 mm, MR height: 17.66 ± 2.60 mm, MR depth: 6.87 ± 2.38 mm, MR-MC: 8.30 ± 2.00 mm, and LC-MC: 3.72 ± 0.87 mm. All parameters were symmetrical between the right and left sides of the mandible, with no significant sex differences. The positions of the MR and LC were related to each other, and the position of the MC was related to the positions of the LC and MR. There was no correlation between the horizontal depth of the LC and the position of the MR, LC and MC. Conclusions: The vertical positions of the MR and LC are related to each other and MC. Therefore, it can be used as a landmark in implant surgery.
