The purpose of this study was to analyze factors affecting unit chair surface management to prevent cross infection of dental hygienist. A total of 311 dental hygienists were surveyed and received general characteristics and responses to dental infection characteristics. The surface of the unit chair was divided into 5 parts and the items for each management method were examined. The statistical analysis of this study was carried out by correlation analysis and multiple regression analysis using SPSS. According to the results of the study, 94.3% of the dental hygienists responded that the infection was important and the related education experience was 76.2%. As for the unit chair management period, the most frequent response was to the start of treatment every day, with 46.6%. The management method was not using disposable cover or disinfectant. The factors influencing the unit chair management were the average number of patients per day, and the bracket table was related to the number of chairs. Control switches were found to be associated with the importance of infection control. In conclusion, although the awareness and practice of infection control is high, it is necessary to improve the method, and it seems that the management of unit chair is insufficient in dental hospitals with many patients and unit chairs. Policy improvement that can be dedicated to infection prevention activities seems to be very necessary.

The purpose of this study was to identify factors that cause periodontal disease in patients with bone disease. The prevalence of periodontal disease in patients with osteoarthritis was investigated in 705 patients with osteoarthritis or osteoporosis among 5,945 adult specimens excluding the under 19 years of age based on the National Health and Nutrition Research Institute. The prevalence of periodontal diseases was found to be significantly different according to general characteristics of some bone disease and oral characteristics. As a result, the prevalence of periodontal disease tended to decrease with increasing income. The education level was similar to that of the undergraduate (43.0%) and the middle school graduate (45.4%), and the prevalence of periodontal disease tended to decrease as the number of high school graduates (31.1%) and college graduates (24.4%). The prevalence of periodontal disease was higher in patients without hypertension (33.8%) than in those without hypertension (46.1%). The prevalence of periodontal disease was higher (28.5%) than that of good oral health (46.8%). The prevalence of periodontal disease was significantly higher (p<0.05). The results of multiple logistic regression analysis were used to examine factors affecting periodontal disease. The results of the multiple logistic regression analysis showed that the higher the incomes, the higher the blood pressure, the better the subjective health condition, respectively. These results suggest that income levels, chronic disease management and use of oral hygiene products are effective in increasing the prevalence of periodontal disease and increasing oral health status in patients with bone disease. Therefore, dental hygienists should make oral health and oral hygiene education suitable for chronic disease management as well as oral health knowledge and make efforts to promote oral health.