Diş Hekimliği Fakültesi / Faculty of Dentistry

Permanent URI for this collectionhttps://hdl.handle.net/11727/2120

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    Comment on: Intensity Modulated Radiotherapy in Head and Neck Cancer: Initial Experience of the First Treated Cases from North-East India
    (2023) Topkan, Erkan; Somay, Efsun; Selek, Ugur; 0000-0001-8251-6913; 38187854; AAG-2213-2021; O-5474-2014
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    Machine Learning Based Orthodontic Treatment Planning for Mixed Dentition Borderline Cases Suffering from Moderate to Severe Crowding: An Experimental Research Study
    (2023) Senirkentli, G. Burcu; Bingol, Sinem Ince; Unal, Metehan; Bostanci, Erkan; Guzel, Mehmet Serdar; Acici, Koray; 36970921
    BACKGROUND: Pedodontists and general practitioners may need support in planning the early orthodontic treatment of patients with mixed dentition, especially in borderline cases. The use of machine learning algorithms is required to be able to consistently make treatment decisions for such cases. OBJECTIVE: This study aimed to use machine learning algorithms to facilitate the process of deciding whether to choose serial extraction or expansion of maxillary and mandibular dental arches for early treatment of borderline patients suffering from moderate to severe crowding. METHODS: The dataset of 116 patients who were previously treated by senior orthodontists and divided into two groups according to their treatment modalities were examined. Machine Learning algorithms including Multilayer Perceptron, Linear Logistic Regression, k-nearest Neighbors, Naive Bayes, and Random Forest were trained on this dataset. Several metrics were used for the evaluation of accuracy, precision, recall, and kappa statistic. RESULTS: The most important 12 features were determined with the feature selection algorithm. While all algorithms achieved over 90% accuracy, Random Forest yielded 95% accuracy, with high reliability values (kappa = 0.90). CONCLUSION: The employment of machine learning methods for the treatment decision with or without extraction in the early treatment of patients in the mixed dentition can be particularly useful for pedodontists and general practitioners.
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    Response to Outcomes of Immediate Dental Implants in Vascularised Bone Flaps for Mandibular Reconstruction
    (2023) Somay, Efsun; Topkan, Erkan; 0000-0001-8120-7123; 0000-0001-8251-6913; 37565638; AAG-2213-2021
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    Effect of A Calcium Phosphate-Containing Desensitizing Agent on Postoperative Sensitivity: A Split-Mouth, Randomized Controlled Study
    (2023) Kerimova Kose, Leyla; Yilmaz, Ayfer Ezgi; Yamanel, Kivanc; Arhun, Neslihan; 37865810
    Purpose: To evaluate the effectiveness of a calcium phosphate-containing-desensitizer (Teethmate Desensitizer - TD), caries type, subject age, and preoperative hypersensitivity on postoperative sensitivity (POS) after composite restorations on deep or extremely deep lesions. Methods: 50 subjects, having two teeth with deep or extremely deep caries, participated in this study. TD was applied randomly to one tooth of each participant, and all teeth were restored with composite resin (Filtek Z250). After 1 week, POS was evaluated according to NRS (numerical rating scale) and VAS (visual analogue scale) by using participant diaries. At 6 weeks, POS was assessed considering subjects' reports. The normality of data was analyzed with Shapiro-Wilk test. For analyses, Pearson's chi-squared test, Mann-Whitney U and the Wilcoxon Signed-Rank test were used, and the effect sizes (ES) were calculated (alpha= 0.05). Results: 47 of the participants completed the 6-week study. There was a small effect size noted for TD for NRS and VAS (P> 0.05, ES < 0.30). Also, there was no statistically significant difference between POS and subject age (P= 0.294, ES= 0.161), type of caries (P= 0.680, ES= 0.042) and preoperative sensitivity (P= 1.000, ES= 0.138) after the first week.
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    Survival of Root Canal-Treated Teeth Adjacent to An Implant: A Retrospective Case-Control Study
    (2023) Sisli, S. N.; Gul Ates, E.; Ozcelik, T. B.; Yilmaz, B.; Revilla Leon, M.; 0000-0001-5685-4409; 0000-0002-6166-2601; 37839623; JJF-5618-2023
    Objectives: To evaluate the survival of root canal treated (RCT) teeth adjacent to an implant compared with that of RCT teeth of the same patient non-adjacent to an implant.Materials and methods: RCT tooth of each patient adjacent to an implant were included in the test group. The control group consisted of another RCT tooth of the same patient; the control RCT tooth was not adjacent to an implant and selected to be of the same type of the RCT tooth in the test group. 72 teeth of 36 patients with at least 4-year follow-up were included. In addition to survival, other clinical and demographic parameters investigated were age, sex, tooth type and position, presence of a crown, presence of retreatment, presence of a post-core, presence of adjacent edentulous area, presence of implant-supported fixed prosthetic restoration on the antagonist tooth and periapical health status. Pearson Chi-Square and Fisher Exact tests were used to compare the test and the control groups with categorical variables (alpha=0.05). Survival curves were obtained by the Kaplan-Meier method, and the Log-rank test was performed to compare the survival probabilities (alpha=0.05).Results: No significant difference in survival rates was observed between the test and the control groups (p = 0.72). Similarly, no significant relationship was found between the investigated clinical variables and the survival rates of RCT teeth (p>0.05). Survival times differed depending on the presence of an adjacent edentulous area (p<0.001) and the periapical health status (p = 0.026).Conclusions: RCT teeth with unhealed periapical tissues had a shorter cumulative survival time. Similarly, those adjacent to an edentulous area had shorter cumulative and complication-free survival times.Clinical Significance: This is the first study to determine the survival outcome of a RCT tooth adjacent to an implant compared to a non-adjacent one in the same patient. Being adjacent to an implant did not have a detrimental effect on the survival time and rate of RCT teeth.
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    Comparison of Implant Survival Rates and Biologic and Mechanical Complications with Implant-Supported Fixed Complete Dental Prostheses Using Four and Six Implants
    (2023) Tamer, Yusuf; Ozcan, Isil; 37552199
    This study aims to compare the incidence of biologic and mechanical complication rates and the survival rates after at least 5 years of implants and implant-supported fixed complete dental prostheses (IFCDPs) placed during second-stage surgery using four and six implants. A total of 77 patients (33 men, 44 women) with a mean age of 60.6 +/- 8.8 years (range: 39 to 80 years) were included, and the total of 92 IFCDPs were classified into two groups: 51 received four implants, and 41 received six implants. No implant failed in the four-implant group (0/204), and one implant failed in the six-implant group (1/246), with no statistically significant differences (P > .05). One prosthetic failure occurred in the four-implant group (1/51), and one failure occurred in the six-implant group (1/41). Both groups experienced some technical and biologic complications, with no statistically significant differences between the groups (P > .05). For both groups, veneer or resin fracture was the most frequent mechanical complication, and mucositis was the most frequent biologic complication. The use of four or six implants may represent a predictable treatment option in the rehabilitation of completely edentulous patients with IFCDPs in the medium-term. Int J Periodontics Restorative Dent 2023;43:e157-e163. doi: 10.11607/prd.5997
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    Predictive Value of Health-Related Quality of Life on Radiotherapy-Related Toxicities in Patients with Head and Neck Cancer
    (2023) Somay, Efsun; Topkan, Erkan; Selek, Ugur; 0000-0001-8120-7123; 0000-0001-8087-3140; 0000-0001-8251-6913; 37874385; AAG-2213-2021; O-5474-2014