ABSTRACT Statement of problem protective and restorative dentistry's basic function is to protect the continuity and integrity of the tissues and to restore function, phonation, and esthetics lost due to any cause. The success of dental ceramics is affected by flexural strength, but little data are available on their clinical performance. Purpose: This study evaluated the flexural strength of the İn-Ceram Alumina, In-Ceram Zirconia, and Finesse press all-ceramic porcelain systems. The success of dental porcelains is partly related to their flexural strength. The values of flexural strength of three porcelain Systems were measured to include In-Ceram Alumina, In-Ceram Zirconia, and Finesse press all ceramic porcelain systems. Material and methods: The flexural strengths of the three porcelain systems were determined by employing the method ISO specification 6872. For the statistical evaluations of the flexure strength values, Kruskal Wallis and Mann-Whitney U tests were used. Results: When the flexural strengths of In-Ceram Alumina, In-Ceram Zirconia, and Finesse groups were compared, the differences were found to be statistically significant. Conclusion: The highest flexural strength was observed for In-Ceram Zirconia, followed by In-Ceram Alumina and Finesse porcelain system. Clinical implications: In this in vitro study, In-Ceram Alumina, In-Ceram Zirconia, and Finesse all-ceramic systems were compared concerning flexural strength. The differences between the groups are significant (p

Purpose: The purpose of this in vitro study was to evaluate the effect of plastic impression transfer copings on the dimensional accuracy of close tray implant impressions. Methods: A master model was constructed using autopolymerizing acrylic resin. Five parallel holes were drilled for implant analogs. Custom impression trays were made with autopolymerizing polymethyl methacrylate resin. The study consisted of 2 groups (n=5): (group 1) Impression was obtained with using plastic impression transfer coping (group 2) Impression was obtained without using plastic impression transfer coping. Vinylpolysiloxane impression material was used for both groups. After the impression were obtained, casts were made by type IV dental stone. Casts were scanned with the lab-type scanner and transferred to the measurement program. Measurements were made from a specific reference corner for each analog to ensure standardization. Data were saved as millimeters and pairwise comparisons were made with Welch's t-test analysis. Results: The effect of plastic caps was evaluated by applying the t-test to each distance. For all distances, the distortion seen in the measurements taken without the cap is higher than the measurements taken with the cap, but no significant differences were found (p>0.05). Conclusions: In the anterior-posterior distances, the distortions were found compression type, in the right-left distances the distortions were found as expansion-type. There is a dimensional change in the measurements taken without a cap, but no clinically significant differences were found.

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Purpose: Aim of the study is to determine the activity of masseter muscle formed by mastication of different foods in individuals with multiple sclerosis (MS). Material and Methods: 12 women with MS and 12 healthy women were included in the study. 3 grams of hazelnut and chewing gum were given to individuals 20 separate times. Activities of the left and the right masseter muscles during mastication were recorded by using surface electromyography (EMG) device. Results: Values obtained from healthy women were higher than those obtained from patients with MS for both foods and both sides. Conclusion: The changes in the central and peripheral nervous systems of the patients affect chewing function.

Abstract Objectives: This study aimed to investigate provision of dental care services before and during the COVID-19 pandemic in western Türkiye. Materials & Methods: Data was screened between 1 December 2018-1 June 2022 from the hospital database of Izmir Training Dental Hospital, Izmir, Türkiye. All dental procedures including oral and radiographic examination, dental fillings, restorative/reconstructive treatments, extraction, endodontic treatment, treatment of parafunctional habits, periodontal treatment, emergency dental treatments. Data envelopment analysis model was applied to measure the efficiency of decision-making units. Results: Total number of dental and auxiliary staff worked in the selected hospital was 84±15 (mean±SD) and 105±0 (mean±SD) respectively and the number of active dental chair was 150±0 (mean±SD). While oral examination was the most performed dental care services, root canal treatment and extractions were the least effected treatment modalities during the selected years. When the scale efficiency value is examined, it is observed that the most effective year was 2019 (scale efficiency value: 1), the second effective year was 2020 (0.987), and the third effective year is 2022 (0.886), and 2021 (0.875) was the least effective year. Conclusion: Non-aerosol generated procedures were least effected oral care services during the pandemic. It is concluded that COVID-19 pandemic has caused marked impairments in routine dental care services during the year 2020 and 2021. The policy makers should be well-prepared for future pandemics to dedicate uninterrupted dental care services as well as public health.