Introduction. Cone-beam computed tomography (CBCT) is considered to be the most informative radiographic method for pre- and postoperative analysis of the maxillary anatomy and for avoiding further complication. Canalis sinuosus is one of such structures that damage can go along with bleeding and neurological symptomatology. The aim of the study was to investigate radiological and morphometric features of the canalis sinuosus in Russian population using CBCT technique. Materials and Methods. 150 CBCT scans of 61 males and 89 females aged from 24 to 80 years were retrospectively studied with different slice thickness and evaluated with regards to prevalence and diameter among age and gender groups in Russia. Results. CS prevalence in this study was 67%, and CS was most frequently presented in the lateral incisor region (33.5%). Women showed statistically higher CS prevalence (p<0.01) than the male group, and there was no statistically significant difference observed between occurrence and localization of CS and age groups. Conclusion. CBCT examination demonstrated good diagnostic efficiency in CS visualization, and the CS may have variations on its location and prevalence with statistically significant differences between the gender group and without significant differences among age groups and can depend on the population.

Dental implant failure in the anterior maxilla can be caused by the range of the features. One of them is neighboring neurovascular structure damage, such as the canalis sinuosus (CS), that carries the superior anterior alveolar nerve. The aim of the report is to demonstrate clinical symptomatology and radiographic signs of CS damage in a 45-year-old female patient who underwent upper left lateral incisor extraction and immediate implant placement and implant removal in 16 days secondary to pain and paresthesia in the maxillary left region.

Aim. To study the state of oral mucosa and rationale of its changes in patients with a laboratory-confirmed diagnosis of SARS-CoV-2, moderate severity. Materials and methods.A retrospective single-center study was conducted on patients who were in the infectious diseases department from May to June 2020 with an initial diagnosis of ICD-X: J18.9: coronavirus infection. This study included 90 patients aged 24 to 83 years (52 male and 38 female, average age 53.6 ± 9.7 years).Results. C-reactive protein was increased in 81 individuals upon admission (44.15 ± 31.8 mg / dl). Twenty patients had increased fibrinogen values (average increased fibrinogen values were 5.96 ± 1.6 g / l). The analysis for D-dimer was held in 15 patients (average value 348.6 ± 103.68 ng / ml), 10 people from that with the increased indicators (435 ± Volume 18, 02/2020 Исследование / Scientific researches 24 ng / ml). Hemorrhagic manifestations occurred in 12 (13.3%) patients, whose history was not burdened. Pronounced xeroderma of the facial region and angular cheilitis were detected in 21 (23.3%) patients. In 80 patients (88.8%), an examination of the mucous membrane of the tongue was observed plaque from white, light yellow to brown. In 36 (40%) patients, pigmentation was detected in the area of the attached gingiva on the upper and lower jaws.Conclusions. , changes in oral mucosa are not the primary cause, but appear as a result of drug treatment and disease progression, despite the fact that the oral cavity is one of the sources of entry gates for infection.

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Aim. The aim of the study is to evaluate the difference in MB2 prevalence with different slice thicknesses in maxillary first molars. Materials and Methods. Two hundred nonfilled MB2 canals in maxillary first molars of 156 people (75 females and 81 males) aged from 20 to 73 years old were evaluated with CBCT with different slice thicknesses: 0.5 mm, 1 mm, 3 mm, and 10 mm. A general analysis was performed out, as well as in the age groups and on gender groups. Results. Visualization with 0.5 mm and 1 mm slice thicknesses was 100% and generally equal, in both the male and the female group. General MB2 visualization with 3 mm slice thickness was 42% and 29% for the male group and 27% for the female group. No canals were visualized with 10 mm slice thickness. The study did not demonstrate a statistical difference in the MB2 prevalence between gender and age groups with the 3 mm slice thickness. Conclusion. The most valuable way to evaluate the root canal system in first maxillary molars with CBCT is using 1 mm slice thickness for both genders and every age group.