Cilt:49 Sayı:01 (2022)

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https://dspace.ankara.edu.tr/handle/20.500.12575/84780

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Browsing Cilt:49 Sayı:01 (2022) by Author "Other"

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    Ameloblastoma of the Posterior Mandible: Radical Resection and Reconstruction Using Osteofaciocutaneous Free Fibular Flap
    (Ankara Üniversitesi, 2022) Bozkurt, Poyzan; Other; Other
    This study reports a case of an ameloblastoma in the posterior region of the right mandible in a 38-year-old female patient. The diagnosis was made after needle aspiration biopsy and resection treatment was planned. The resected mandible was constructed via osteofaciocutaneous free fibular flap. Today, this treatment option is considered the gold standard and in the present case, treatment results were favorable.
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    Automatic Detection of Dentigerous Cysts on Panoramic Radiographs: A Deep Learning Study
    (Ankara Üniversitesi, 2022) Ünsal, Gürkan; Other; Other
    Aim: The aim of this study is to create a model that enables the detection of dentigerous cysts on panoramic radiographs in order to enable dentistry students to meet and apply artificial intelligence applications. Methods: E.O. and I.T. who are 5th year students of the faculty of dentistry, detected 36 orthopantomographs whose histopathological examinations were determined as Dentigerous Cyst, and the affected teeth and cystic cavities were segmented using CranioCatch's artificial intelligence supported clinical decision support system software. Since the sizes of the images in the dataset are different from each other, all images were resized as 1024x514 and augmented as vertical flip, horizontal flip and both flips were applied on the train-validation. Within the obtained data set, 200 epochs were trained with PyTorch U-Net with a learning rate of 0.001, train: 112 images (112 labels), val: 16 images (16 labels). With the model created after the segmentations were completed, new dentigerous cyst orthopantomographs were tested and the success of the model was evaluated. Results: With the model created for the detection of dentigerous cysts, the F1 score (2TP / (2TP+FP+FN)) precision (TP/ (TP+N)) and sensitivity (TP/ (TP+FN)) were found to be 0.67, 0.5 and 1, respectively. Conclusion: With a CNN approach for the analysis of dentigerous cyst images, the precision has been found to be 0.5 even in a small database. These methods can be improved, and new graduate dentists can gain both experience and save time in the diagnosis of cystic lesions with radiographs.
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    Pulp Dimensions as an Indicator of Age in Turkish Subpopulation
    (Ankara Üniversitesi, 2022) Yanık, Deniz; Other; Other
    Purpose: Age prediction is an important factor in the legal process in forensic medicine. This study aims to assess the impact of pulp height and width on dental age prediction. Materials & Methods: This study consisted of 1000 patients (11-77 years, 500 females and males). The mandibular first molar was assessed on panoramic radiography. Two age estimation methods were applied. The first technique included measurements of pulp length and crown length whereas parameters of the second method were crown width and pulp width. Patients were divided into 4 age groups: Group 1 (between 11 and 18 years), Group 2 (between 19 and 29 years), Group 3; (between 30 and 50 years), Group 4 (between 51 and 77 years). Samples were evaluated by two observers. Multiple linear regression models were performed to predict the chronological age for each indicator. Pearson correlation coefficient was used to assess the relationship between chronological age and predicted dental age. Results: Coefficients of models 1 and 2 were 0.461 and 0.523, respectively. Pearson correlation analysis showed a negative relationship between chronological age and estimated age. The difference between sex is not statistically significant. The age between 30 and 50 years had the highest accuracy, whereas the age between 50 and 77 years had the lowest results among age subgroups. Conclusion: The parameters based on width provided more reliable outcomes than parameters based on length. The age between 30 to 59 years showed the highest accuracy of the pulp width and the pulp height in dental age prediction.
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    Regenerative Endodontic Treatment of Permanent Teeth with Open Apex: Case Series
    (Ankara Üniversitesi, 2022) Bayram, Melike; Other; Other
    The purpose of these case reports is the follow-up of root development and lesions in the apical with different regenerative protocols applied to teeth with vital or vital open apex. In the first case, double antibiotic paste was used for 3 weeks to ensure disinfection, and in the second case, triple antibiotic paste was used. Regeneration treatment was applied with apical bleeding method in the first case and with PRF in the second case. After the blood clots were formed, closure was provided with MTA Plus. It was observed that the lesion area healed completely at the end of 1 year and gave a positive response to the pulp test with electricity. In the second case, it was observed that the radiolucent area in the apical region was greatly improved during the 6th month follow-up, and a positive response was obtained for the pulp test with electricity and the cold test.
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    The Awareness, Anxiety and Depression Levels of Dentists and Dentistry Patients Regarding the COVID-19 Pandemic
    (Ankara Üniversitesi, 2022) Ciğerim, Saadet Çınarsoy; Other; Other
    Purpose: The novel coronavirus (COVID-19) epidemic which started in late 2019 has had significant effects on all areas, especially the health sector. The purpose of this study is to investigate the awareness, anxiety and depression levels of dentists and orthodontic and dental patients regarding the COVID-19 pandemic. Methods: This was an online survey study including 679 individuals at the ages of 12-60 consisting of dentists and dentistry patients (female, n=395; male, n=284). The survey was consisted of 3 parts. The first part consisted of a set of questions on sociodemographic characteristics, knowledge levels on the COVID-19 pandemic and attitudes and perceptions regarding infection control, sterilization at dental clinics. The second and third parts consisted of the Generalized Anxiety Disorder-7 (GAD-7) and Depression Severity (PHQ-9) questionnaires examining psychological status in the pandemic period. The level of significance was accepted as p<0.05. Results: While the rate of experiencing occupational future anxiety in the dentists was significantly higher than that in the patients, the rate of making plans for the future in the patient group was significantly higher in comparison to the dentists. The rates of thinking that the risk of disease during dental procedures is high were significantly different between the dentist and patient groups. There was also a significant difference between the groups in terms of their GAD-7 scores, where the scores of the dentists were found to be lower than those of the patients. Conclusıon: Both the patient and dentist groups had moderate levels of generalized anxiety disorder and depression, while these levels were higher among the patients. There was almost a consensus between the patients and dentists on the idea that the risk of infection is high during dental procedures. Because of the pandemic, the dentists experienced concerns during treatment, and the vast majority performed only emergency treatments.