[The relationship between dietary factors and susceptibility of periodontal disease].

PURPOSE: A clinical survey was made on the life style and dietary behaviors of people with non-periodontal disease and people with periodontal disease for prevention and treatment of periodontal diseases. METHODS: 72-hour diet analysis and frequency analysis of dietary intake were performed in 60 patients with moderate-to-severe periodontal disease and 60 patients with healthy periodontal tissues randomly selected in the Ninth People's Hospital for dental treatment. The data was analyzed by Student's t test and Chi-square test with SPSS13.0 software package. RESULTS: There was significant difference (P<0.05) in vitamin C, flavonoids and ß-carotene dietary intake between control group and periodontal disease group; In periodontal disease group, dietary intake of selenium and zinc intake was different from the normal control, but the difference was not statistically significant (P>0.05). CONCLUSIONS: There is a close relationship between oral health and antioxidant nutrients. Lower dietary vitamin C content, flavonoid content and ß-carotene intake lead to destruction of periodontal tissue and higher incidence of periodontal disease.

[Occupational health status of migrant female workers of artificial gem manufacturing cottages in Guangxi].

OBJECTIVE: To investigate occupational health status in migrant female workers in artificial gem cottages in Guangxi and to provide reference evidence for drawing up countermeasures to protect migrant female workers from occupational hazards. METHODS: Two thousands and ninety five migrant female workers in artificial gem manufacturing cottages in Wuzhou City, Guangxi Province, were randomly recruited to participate in the investigation. The standardized occupational health questionnaires were used to collect the information of demographic characteristics, occupational exposure and medical symptoms by interviewing with persons. RESULTS: Artificial gem manufacturing cottages in Wuzhou were mainly composed of family-workshops. There were only simple and crude hygienic facilities. Major occupational hazards included dusts, noise, vibration, hydrofluoric acid, and light stimulation. The mean age of workers was 30. Mean exposure duration was 5 years. There was no occupational health monitoring records for these workers in the past years. Major symptoms included back pain, eye discomfort, and headache. The incidence of discomfort symptoms increased with age. CONCLUSION: Occupational health protection and monitoring in artificial gem manufacturing cottage, in Guangxi have not been performed. More effective occupational health education and administration need to implement in family-type handicraft manufacturing.