[Investigation of teeth defect and repair status of elderly people in Jiading district, Shanghai].

PURPOSE: To investigate teeth defect, loss and repair needs of the elderly people in Jiading district, Shanghai, and provide basis for government's policy of oral health care. METHODS: Three thousand two hundred and sixty 65-74 years old people were selected by cluster sampling in Jiading, Anting, Nanxiang, Jiading district, Shanghai. They were investigated for oral heath situation. 824 people with teeth defect and loss were randomly chosen to investigate the needs of repair, knowledge of oral health. EpiData software was used for descriptive analysis. RESULTS: Among the selected people, 80.4% had teeth defect and 4.8% had teeth loss. The repair rate of teeth defect and loss was 60.8% and 91%, respectively. 28% were fixed denture, 39.5% were removable denture, 24.4% were fixed and removable denture, and 8.2% were full denture. There was no gender difference in teeth loss and repair. The main reason for not being repaired was high cost, accounting for 32%, followed by difficult for hospital registration (24%), fear of tooth extraction pain and complications (20%) and mobility difficulties. As for restoration demand, 29.7% demand dental implants, 64.8% demand porcelain teeth, 43.2% demand hospital visits, 51% demand private clinics, 25.5% demand self-payment, 42.2% demand partially reduced price; 32.3% hoped restoration free of charge; 18.2% of them had a score of more than 3 points. 15.5% were between 0-3 scores and 66.3% were below 0 score. CONCLUSIONS: The situation of teeth deficiency and repair of the elderly in Jiading district of Shanghai is facing serious challenges. The elderly people are lack of knowledge about teeth restoration. Therefore, it is necessary for the government to increase popular science education of oral health care, invest money to improve the situation of dental restoration, and improve oral health level of the elderly.

[Effects of free dental filling interventions on early childhood primary tooth caries in Shanghai Jiading district].

PURPOSE: To provide scientific basis for the establishment of oral health care polices in Jiading, and to evaluate the effectiveness of a free dental filling intervention conducted for childen in Jiading district. METHODS: Nine hundred and eighteen children of 3-5 year old from two kindergartens with similarities in living environments and economic conditions were enrolled in this study. Children in the intervention group received both oral health examination and free filling of shallow and moderate caries once a year for 3 years, while children in the control group received only oral health examination once a year. The data were analyzed with SPSS 20.0 software package for Chi-square test. RESULTS: Total caries prevalence，mean dft and CSI of the two groups had no significant difference in the first year. There was significant difference between the two groups in caries prevalence, mean dft and CSI (which were 43.90%, 2.86 and 7.34, respectively) after 3 years of the interventions. CONCLUSIONS: Free dental filling intervention programme is effective in early prevention and control of caries.

[The effects of different interventions on 12-year-old children's permanent teeth caries and filling rate in Shanghai Jiading district].

PURPOSE: To evaluate the effects of different interventions on 12-year-old children's permanent teeth caries and filling rates in Shanghai Jiading District. METHODS: Six hundred and ninety-one 12-year-old children from 3 middle schools were randomly divided into 3 groups. The filling intervention group received filling of the permanent teeth free of charge for 3 years; The health education group received oral health education for 3 years; The control group only accepted oral examination for 3 years. The data was analyzed with SPSS 20.0 software package for X2 test. RESULTS: On the baseline, the permanent teeth caries rates of 3 groups were 32.10%, 35.56% and 36.84%, and the filling rates were 17.07%, 16.24% and 17.04%, respectively. After 1 year, permanent teeth caries rates of 3 groups were 35.92%, 42.26% and 44.50%, respectively. There was no significant difference among the 3 groups (P>0.05). The filling rates were 93.28%, 61.41%, and 16.67%, respectively. There was significant difference among the 3 groups (P<0.05). After 3 years, permanent teeth caries rates of 3 groups were 37.04%, 48.12% and 58.85%, and the filling rates were 93.66%, 61.51% and 17.28%, respectively. There were significant differences among the 3 groups (P<0.05). CONCLUSIONS: Filling intervention and health education can significantly reduce the permanent teeth caries prevalence rate and improve permanent teeth caries filling rate of 12-year-old children. Furthermore, the effects of filling intervention were more significant than the health education intervention. Supported by Medical Research Project of Science and Technology Committee of Shanghai Jiading District (2014-KW-04).

[The lignins from Torreya grandis cv. Merrilli].

AIM: To separate and identify the chemical constituents of the aril of Torreya grandis cv. Merrilli. METHODS: Three lignins were isolated by chromatography and their chemical structures were elucidated by IR, EI-MS, 1HNMR, 13CNMR, DEPT and 2D-NMR spectral methods. RESULTS: Three lignins were identified as pinonesinol, dihydrodehydrodiconiferylalcohol and (7,8-cis-8,8'-trans)-2',4'dihydroxyl-3, 5-dimethoxy-lariciresinol. CONCLUSION: These compounds were isolated from this plant for the first time, and compound III is a new compound.