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Aim: The aim of the present study was to evaluate the effect of the pandemic regulations on clinics of the Oral and Maxillofacial Surgery Department. Material and Methods: Patient data (age, gender, total patient number, total number of applied treatments and total income) between March 16 and June 1, 2020 were evaluated and compared with the records of the previous two years. Results: Comparison of the number of patient treated showed a 90% decrease in 2020. In addition, the total number of applied treatment decreased by more than 90% in 2020. Additionally, the total income of the department decreased by 90% in 2020 compared to the previous two years. Discussion: The SARS-CoV-2 virus can transmit from human to human via airborne droplets or aerosol. Therefore, the dentist and the staff of a dental clinic or department are more likely to be infected with SARS-CoV-2 than the staff of any other health discipline. The COVID-19 pandemic has affected all people around the world, socially, economically, and psychologically. Governments must be economically prepared for such a situation.

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Objectives: This study aimed to evaluate the apical seal obtained with lateral compaction of gutta-percha in oval-shaped root canals prepared with either self-adjusting files or ProTaper Universal rotary files. Materials and Methods: Twelve pairs of extracted mandibular premolars with oval-shaped root canals were randomly divided into two groups. The first group was biomechanically prepared with ProTaper Universal files, while the self-adjusting file system was used in the second group. The roots were better filled using cold lateral compaction of gutta-percha. Apical microleakage was measured with the computerized fluid filtration method. The results were analyzed statistically using the Mann-Whitney U test. Results: All of the roots in both groups showed leakage. Group 1 demonstrated significantly less microleakage (p<0.05). Conclusions: Instrumentation of oval-shaped canals using a self-adjusting file system with cold lateral compaction of gutta-percha demonstrated significantly greater apical microleakage when compared to ProTaper Universal. The apical leakage with different filling techniques, combined with self-adjusting files, should be evaluated in further studies.

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