Diş Hekimliği Fakültesi Koleksiyonu
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Article Citation - WoS: 2Citation - Scopus: 2A YOLO-V5 approach for the evaluation of normal fillings and overhanging fillings: an artificial intelligence study(Sociedade Brasileira de Pesquisa Odontologica, 2024) Akgul, Nilgun; Yilmaz, Cemile; Bilgir, Elif; Celik, Ozer; Baydar, Oguzhan; Bayrakdar, Ibrahim SevkiDental fillings, frequently used in dentistry to address various dental tissue issues, may pose problems when not aligned with the anatomical contours and physiology of dental and periodontal tissues. Our study aims to detect the prevalence and distribution of normal and overhanging filling restorations using a deep CNN architecture trained through supervised learning, on panoramic radiography images. A total of 10480 fillings and 2491 overhanging fillings were labeled using CranioCatch software from 2473 and 1850 images, respectively. After the data obtaining phase, validation (80%), training 10%), and test-groups (10%) were formed from images for both labelling. The YOLOv5x architecture was used to develop the AI model. The model's performance was assessed through a confusion matrix and sensitivity, precision, and F1 score values of the model were calculated. For filling, sensitivity is 0.95, precision is 0.97, and F1 score is 0.96; for overhanging were determined to be 0.86, 0.89, and 0.87, respectively. The results demonstrate the capacity of the YOLOv5 algorithm to segment dental radiographs efficiently and accurately and demonstrate proficiency in detecting and distinguishing between normal and overhanging filling restorations.Article Citation - WoS: 8Citation - Scopus: 9Efficacy of injectable platelet-rich fibrin on clinical and biochemical parameters in non-surgical periodontal treatment: a split-mouth randomized controlled trial(Springer Science and Business Media Deutschland GmbH, 2023-12-28) Cin, Gizem Torumtay; Alpan, Aysan Lektemur; Cevik, OezgeAbstract: Objectives: The purpose of this clinical trial was to evaluate the potential clinical and biochemical effects of injectable platelet-rich fibrin (i-PRF) application adjunct to scaling and root planning (ScRp) in deep periodontal pockets. Materials and methods: In this split-mouth-designed study, 17 patients with 34 deep periodontal pockets were randomly treated with ScRp + i-PRF (test group) and ScRp + saline (control group). Clinical periodontal measurements were recorded at baseline, 1st, 3rd, and 6th months after the treatments. The levels of vascular endothelial growth factor (VEGF), tumor necrosis factor-α (TNF-α), and interleukin (IL)-10 in gingival crevicular fluid (GCF) samples were analyzed using the ELISA method at baseline, 7th, and 14th days. Results: Clinical periodontal parameters showed significant improvements with both treatment modalities. Mean pocket reduction (PD) and clinical attachment (CAL) gain were significantly higher in the test group than in controls at follow-up visits (p < 0.05). In the test group, gingival recession (GR) values were significantly lower compared to the control group. VEGF and IL-10 levels in the test group were significantly higher than in controls at the 14th day, and TNF-α levels were found significantly lower in the test group at the 7th and 14th days. Conclusions: Especially in the test group, the significant increase in VEGF and IL-10 expressions and the decrease in TNF-α levels may have accelerated the periodontal healing observed in the clinical parameters. Clinical relevance: The result of the present study demonstrated the beneficial effects of adjunctive i-PRF administration during non-surgical periodontal treatment of deep periodontal pockets. Clinical trial registration number: NCT05753631. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.Article Citation - WoS: 8Citation - Scopus: 8Effects of different toothpastes on the color and whiteness of stained anterior composite resin(Nihon University, School of Dentistry, 2023) Yazkan, Basak; Yilmaz, Ebru; Yenidunya, Ozge Gizem; Akgul, NilgunPurpose: To evaluate changes in the color of an anterior nanohybrid composite resin and differences in its whitening index after 30 days of brushing with six brands of whitening toothpaste in vitro to simulate the situation in individuals with high coffee consumption. Methods: Eighty-four disk-shaped resin specimens were prepared (shade A2). For initial staining, the samples were immersed in coffee solution for 14 days and then divided into eight groups for treatment with various toothpastes. Color was assessed at the baseline, after initial staining, and on days 7, 14, and 30 of the staining-and-brushing cycle. Color stability was evaluated based on the CIEDE2000 color difference (ΔE00), and differences in whiteness were determined using the whitening index for dentistry (WID). Results: The highest ΔE00 and ΔWID values were obtained with Colgate Herbal, followed by Opalescence Whitening and Crest Baking Soda and Peroxide, whereas the lowest values were obtained with distilled water, followed by Yotuel Pharma B5, on day 30 of the staining-and-brushing cycle. Conclusion: In terms of improving the color and whiteness of coffee-stained anterior nanohybrid composite resin, Colgate Herbal, Opalescence Whitening, and Crest Baking Soda and Peroxide yielded promising results after 30 days of continuous use. © 2023 Nihon University School of Dentistry.Article Citation - Scopus: 27Analysis of dentistry youtube videos related to covid-19(Associacao Brasileira de Divulgacao Cientifica, 2020-08) M., Ozdede; I., PekerThis study aimed to analyze the videos available on YouTube related to dentistry and the novel coronavirus (COVID-19), as there is no such analysis in the existing literature. The terms “dental” and “COVID-19” were searched on YouTube on May 9, 2020. The top 116 English-language videos with at least 300 views were analyzed by two observers. Data was saved for each video, including target audience, source, country of origin, content, number of views, time watched, average views, duration, like/dislike ratio, and usefulness. Total video information and quality index (VIQI) scores were calculated, consisting of flow, information, accuracy, quality, and precision indices. Non-parametric tests were used for analysis. The analyzed videos were viewed 375,000 times and totaled 20 h of content. Most videos were uploaded by dentists (45.7%), originated from the United States (79.3%), and contained information targeted towards patients (48.3%). Nearly half of the videos (47.4%) were moderately useful. For the usefulness of the videos, statistically significant differences were found for all indices as well as total VIQI scores. A comparison of the indices according to the relevance of the videos showed statistically significant differences in the videos’ information and precision indices and total VIQI scores. The results of this study showed that dentistry YouTube videos related to COVID-19 had high view numbers; however, the videos were generally moderate in quality and usefulness. © 2020, Associacao Brasileira de Divulgacao Cientifica. All rights reserved.Article Citation - WoS: 56Citation - Scopus: 60PRF improves wound healing and postoperative discomfort after harvesting subepithelial connective tissue graft from palate: a randomized controlled trial(Springer, 2019-05-18) Alpan, Aysan Lektemur; Cin, Gizem TorumtayObjectives: The aim of this study is to determine the use of platelet-rich fibrin (PRF) in the management of soft tissue donor site healing after harvesting connective tissue graft (CTG) from the palate and evaluate the postoperative discomfort (pain, bleeding, analgesic consumption, tissue color match) of patients. Materials and methods: Forty patients were randomly assigned to PRF or control group. In the PRF group, PRF membrane was placed into CTG donor site. After surgery, delayed bleeding, early healing index (EHI), tissue color match, and analgesic consumption were recorded. The visual analog scale (VAS) was used to observe the postoperative pain and tissue color match. Data were analyzed using the independent sample t test and the repeated measure ANOVA test. Results: The patients in the PRF group reported significantly lower pain scores at all-time points. Postoperative 3rd and 7th day, EHI scores were lower in the favor of the PRF group. VAS score values of tissue color match were lower in the control group at 7th and 14th day, compared with the PRF group. Analgesic intake was significantly lower in the PRF group postoperatively at 1st and 3rd day that of control group. Conclusion: PRF application at the palatal donor site demonstrates promising results in terms of better wound healing and reduced postoperative discomfort in the patients after harvesting CTG. Clinical relevance: Patients may avoid surgical operations because of the discomfort or pain feeling. Reducing postoperative pain and discomfort and accelerating recovery meet the wishes of every patient and physician. PRF can provide these requirements as an easy method to obtain and implement. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.Article Citation - WoS: 4Citation - Scopus: 7An unusual case of double stafne bone cavities(Springer, 2020-01-02) Ozdede; MelihStafne bone cavity (SBC) is a rare lingual bone depression that is asymptomatic and contains salivary glands. Radiographically, an SBC is usually seen as well-defined homogenous oval radiolucency in the mandibular posterior region, below the mandibular canal. In this paper, a rare case of posterior-variant, double SBCs was presented. A 43-year old male patient was referred to our clinic with the complaint of third molar teeth. Panoramic and cone-beam computed tomographic images showed two well-defined oval radiolucencies on the left mandibular molar region, inferior to mandibular canal borders. No pain or swelling was detected in the region of the radiolucencies. Previous dental radiographs had the same images. Magnetic resonance imaging was performed to evaluate the presence of salivary gland in the radiolucent contents. Images showed that the bone cavities were filled with soft tissue having a signal similar to the submandibular gland. The diagnosis was made as double SBCs and the patient was informed about the lesions. © 2020, Springer-Verlag France SAS, part of Springer Nature.Article Citation - WoS: 4Citation - Scopus: 4Effects of blood contamination and hemostatic agents on bond strength in primary teeth dentin(Wolters Kluwer Medknow Publications, 2020-08) Erdogan, Y.; Karayilmaz, H.; Unal, M.; Gungor, O.; Ciftc, Z. Z.Background: Contamination is a common problem in pediatric restorative dentistry and there are a few studies that investigate blood contamination, hemostatic agents, and tooth dentin. Aim: The purpose of this study was to evaluate the effects of blood contamination and hemostatic agents on the bond strength of two different bonding systems with the dentin of primary teeth. Materials and Methods: Buccal and lingual dentin surfaces of 40 primary second molar teeth were used for this study. Specimens were divided into 4 groups according to the contamination and hemostatic agents (Blood-B, Ankaferd Blood Stopper-A, ViscoStat-V, Control-C) and then every group was further divided into two subgroups according to the bonding systems (Clearfil SE Bond-I, All Bond Universal-II, n = 10 per group). A bulk-fill composite resin was built-up on the surfaces. The specimens were tested in the micro shear mode at a crosshead speed of 1 mm/min on a universal test machine. Statistical analysis was performed with ANOVA and Tukey's tests at P < 0.05. Results: Significant differences have been detected in the micro shear bond strengths only between the Ankaferd Blood Stopper (ABS) (AI = 13.72 ± 4.47 and AII = 9.12 ± 4.4) and control groups (CI = 22.78 ± 10.86 and CII = 16.49 ± 6.55) without regards to the bonding systems. The highest scores were obtained in the control groups. Clearfil SE Bond showed better performance than All Bond Universal in all groups. Conclusion: It was determined that only the ABS contamination groups showed statistically significant decreases in the bond strengths when compared with control groups. © 2020 Wolters Kluwer Medknow Publications. All rights reserved.Article Citation - WoS: 2Citation - Scopus: 1Evaluation of mercury release from dental amalgam after cone beam computed tomography and magnetic resonance imaging with 3.0-T and 1.5-T magnetic field strengths(Mosby Inc., 2020-11) Ozdede, Melih; Yilmaz, SelmiObjectives: This in vitro study aimed to investigate leakage of mercury from amalgam restorations after cone beam computed tomography (CBCT) and magnetic resonance imaging (MRI) examinations. Study Design: In total, 238 amalgam disks were prepared and placed in saline solution. The samples were allocated randomly to 7 groups, with 34 samples in each group. CBCT imaging was performed for 4 groups with different imaging parameters (narrow/wide field of view [FOV]; standard/high-resolution). MRI procedures were performed with 3.0-T and 1.5-T magnetic field strengths. No imaging was performed for the samples in the control group. The amalgam samples were removed from the tubes 24 hours after imaging and submitted for plasma mass spectrometry analysis. Kruskal-Wallis and Dunn's tests were performed to compare data. A P value less than .05 was accepted as statistically significant. Results: The highest mean mercury value was found in the 3.0-T MRI group, whereas the lowest mean value was found in the narrow FOV, standard-resolution CBCT group. There were no significant differences between the control group and the experimental groups (P ? .338) or between the experimental groups (P > .05). Conclusions: CBCT and MRI procedures similar to those used in patient care caused no significantly different mercury release compared with nonexposed samples. © 2020 Elsevier Inc.Article Citation - WoS: 22Citation - Scopus: 24In vitro evaluation of the wear of primary tooth enamel against different ceramic and composite resin materials(Wolters Kluwer Medknow Publications, 2019) Bolaca, A.; Erdogan, Y.Background: Although there are several studies on permanent tooth wear caused by dental materials, studies concerning primary teeth are limited. Aim: To evaluate the wear of primary tooth enamel against different ceramic and composite resin materials. Settings and Design: In vitro study. Materials and Methods: We assessed five materials (n = 10 per group): monolithic zirconia (group Z), lithium disilicate glass ceramic (group L), resin nanoceramic (group R), nanohybrid composite resin (group C), and primary tooth enamel (group E). The mesiopalatal cusps of primary maxillary second molars were used as antagonists. Wear tests were performed in a dual-axis chewing simulator, and the volume loss in the antagonist tooth was evaluated using a laser scanner and three-dimensional profiling system. Statistical Analysis Used: Data were statistically analyzed using one-way analysis of variance with Tukey's post hoc tests (P < 0.05). Results: The maximum antagonist tooth wear was observed in group L (3.84 ± 0.7 mm 3 ), followed by groups C (3.68 ± 0.76 mm 3 ), R (3.48 ± 0.71 mm 3 ), Z (2.66 ± 0.65 mm 3 ), and E (1.66 ± 0.42 mm 3 ). Volume loss was significantly lesser in group Z than in groups L and C (P < 0.05), whereas there were no significant differences among groups L, C, and R. Conclusion: Within the limitations of this in vitro study, our findings suggest that zirconia should be used for full coronal coverage in primary tooth restorations because it causes lesser antagonist tooth wear than does lithium disilicate, resin nanoceramic, and nanohybrid composite resin. © 2019 Nigerian Journal of Clinical PracticeArticle Citation - WoS: 28Citation - Scopus: 30Three-year clinical evaluation of high-viscosity glass ionomer restorations in non-carious cervical lesions: a randomised controlled split-mouth clinical trial(Springer Verlag, 2018-08-17) Celik, Esra Uzer; Tunac, Ayse Tugce; Yilmaz, FatmaObjective: To compare the 3-year clinical performance of high-viscosity glass ionomer restorations with that of composite restorations in non-carious cervical lesions (NCCLs). Materials and methods: One hundred thirty-four NCCLs were randomised into two groups according to a split-mouth design. In the experimental group (Hv-GIC), lesions were restored with a high-viscosity glass ionomer (EQUIA Fil, GC), whereas a composite resin (G-aenial, GC) was applied in the control group (E&Ra/comp). All restorative materials were used according to the manufacturers’ instructions. Clinical evaluations were performed after 1 week, 6 months, 1 year, 2 years, and 3 years using FDI (World Dental Federation) criteria. Data were analysed using Friedman’s ANOVA and Mann-Whitney U tests (? = 0.05). Results: While retention rates of the Hv-GIC group were 98.5%, 96%, 91%, and 87% in respective evaluation periods, no retention loss was observed in the E&Ra/comp group at any time. There was a statistically significant difference between study groups regarding the retention criterion in both the second and third years (p = 0.008 and p = 0.003, respectively). Furthermore, there was a statistically significant difference between the groups in terms of surface lustre at the third-year recall, in favour of the E&Ra/comp group (p = 0.022). Conclusions: The 3-year clinical performance of E&Ra/comp restorations in NCCLs was better than that of Hv-GIC restorations. The most common problems in Hv-GIC restorations were a loss of retention and reduction in surface lustre. Clinical relevance: Although the 3-year clinical performance of Hv-GIC restorations in non-retentive lesions was acceptable, it was worse than in composites. The operator should consider the benefit/loss ratio of Hv-GIC when he/she decides to use this material in non-retentive cavities, especially those that are shallow. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
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