Résumé
Objective@#To evaluate the changes of oral health status and oral health behavior among 12 year old children in Hainan province during 2005-2015, to provide basis for child oral disease prevention.@*Methods@#Through the third and fourth national oral health epidemiology survey, changes in dental caries prevalence rate, dietary habit, oral health behavior, medical care in 12 year old chirdren were analyzed.@*Results@#The percentage of dental caries in permanent, gingival blleeding, dental calculus of 12 year old chirdren in 2005 was 49.9%, 63.2%, 31.5% respectively, which 57.0%, 46.8%, 39.5% respectively in 2015( χ 2=6.78, 36.78, 9.45, P<0.05). The percentage of sugary snacks,drink and milk consumption every day in 2005 was 31.0%, 13.1%, 21.8% respectively, which increased to 40.3%, 27.5%, 30.8% in 2015(χ2=11.53, 38.76, 12.73, P<0.05). 49.3% children had a toothache in 2005, which increased 58.8% in 2015(χ2=23.43, P<0.05).@*Conclusion@#The prevalence of dental caries in permanent teeth of 12 year old children in Hainan was high, while eating habits was poor and oral health behavior was showed significant improvement. Oral health education for 12 year old should be strengthened.
Résumé
Abstract Purpose: To investigate the effect of oxymatrine on periodontitis in rats and related mechanism. Methods: Ninety SD rats were divided into control, model, 10, 20 and 40 mg/kg oxymatrine and tinidazole groups. The periodontitis model was established in later 5 groups. The 10, 20 and 40 mg/kg oxymatrine groups were intragastrically administrated with 10, 20 and 40 mg/kg oxymatrine, respectively. The tinidazole group was intragastrically administrated with 100 mg/kg tinidazole. The treatment duration was 4 weeks. The tooth mobility, gingival and plaque indexes, serum inflammatory factor levels and gingival tissue matrix metalloproteinases (MMPs) and tissue inhibitor of metalloproteinase (TIMP) protein levels were detected. Results: After treatment, compared with model group, in 40 mg/kg oxymatrine group the rat general conditions were obviously improved, the tooth mobility, gingival index and plaque index were significantly decreased (P<0.05), the serum tumor necrosis factor-α, interleukin-1β and prostaglandin E2 levels were significantly decreased (P<0.05), the MMP-2 and MMP-9 protein levels were significantly decreased (P<0.05), and the TIMP-2 protein level was significantly increased (P<0.05). Conclusions: Oxymatrine can alleviate the experimental periodontitis in rats. The mechanism may be related to its inhibiting inflammatory factor secretion and regulating MMPs/TIMP protein expression.