Objective: This study aimed to examine the association between sleep quality, depression, anxiety and stress levels, and the frequency of temporomandibular disorders in a sample of Turkish dental students during the COVID-19 pandemic. Methods: The current cross-sectional study was conducted with 699 dental university students during the COVID-19 pandemic. Fonseca Anamnestic Index (FAI), Pittsburgh Sleep Quality Index (PSQI), and Depression Anxiety Stress Scale-21 (DASS-21) were used in the present study. Results: The incidence of temporomandibular joint disorders in the present study was found to be 77.5%. Female students' FAI scores were found to be statistically significantly higher than males (p < 0.05). Additionally, higher depression and anxiety and stress levels caused increased PSQI and FAI scores. Conclusion: During the COVID-19 pandemic, increased temporomandibular joint disorders were observed with increased impaired sleep quality and higher depression, anxiety and stress levels among dental university students.

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Background: This study was to evaluate the impression quality and clinical success of 2 Polyvinyl siloxane (PVS) impression materials by using dual-viscosity 1-step impression technique and the putty-wash two-step impression technique.Methods: In this study, Variotime (Heraeus, Hanau, Germany) and a novel silicone Spirias (Imicryl, Konya, Turkey) were selected as PVS impression materials. A total of 40 samples were divided into groups according to the impression technique. Three possible categories were established to rate the impression quality. The impression was examined using a laboratory microscope (Opmi Pico, Zeiss) and lenses with 2X to 6X magnification for the presence or absence of bubbles or voids and the complete reproduction of the preparation finish line. A spreadsheet (Excel v2016; Microsoft Corp) was used for processing statistical data. Results of the analysis were calculated as mean and frequency.Results: In the impressions taken with Variotime, the percentage of the successful impression is 95% (Criteria I -II). Only one impression was found unacceptable (criteria III). In impressions with Spirias, the percentage of successful impressions is 100% (Criteria I -II). No-impression was found unacceptable (criterion III). Conclusion:The quality of impressions of both brands Polyvinyl siloxane impression materials revealed a high rate (97.5%) For more precise results, many new studies were needed on different Polyvinyl siloxane impression materials.

Introduction:The World Health Organization defines people aged 65 and over as "older adults". With the development of preventive and curative services and the decrease in fertility and mortality rates, the world population, especially in developed countries, is rapidly aging. The aim of this study was to determine the relationship between the oral-dental health profile and variables such as some socio-demographic characteristics and habits of oral health in older adults.Material and methods: A questionnaire was used to record sociodemographic characteristics and habits of oral health, and a special examination form was used to evaluate oral health. In total, 422 patients were divided into three groups of ages 65-74, 75-84 and 85+. The SPSS 22.0 version was used for the analysis of data.Results: If demographic information of groups are compared, gender and educational status are not statistically significant, but marital status is statistically significant. No statistically significant difference was found between the groups in terms of nutritional content and nutritional limitation. When the questions about oral health were evaluated, a statistically significant difference was found between the groups regarding the status of removable prostheses.Conclusion: Data related to the socio-demographic characteristics, oral health habits and general/oral health status constitute an important resource for dentists and health managers. However, further research is needed to improve the quality of life of the older adult population. The increase of such resources will be beneficial in many areas related to individual oral health care and public health management in older adults.

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