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Objective To investigate the influence of smoking on subgingival flora after periodontitis treatment through microbiological experiments. Methods Fifty-nine patients with periodontitis who completed periodontal treatment in the Department of Stomatology of Nanjing Jiangbei Hospital from 2019 to 2021 were selected and divided into smoking group(30 patients) and non-smoking group(29 patients). The clinical samples of patients's periodontal pockets before and after treatment were collected for detection of Actinobacillus (Aa), Porphyromonas gingivalis (Pg), Plasmobacterium intermedius (PI), Bacteroides forsythiae (Bf), Fusobacterium nucleatum (Fn) and Streptococcus minimus (Pm). Results After treatment, the bleeding index and periodontal attachment of the smoking group were better than those before treatment, while the plaque area index, bleeding index, periodontal pocket depth and periodontal attachment of the non-smoking group were better than those before treatment, and the plaque area index, periodontal pocket depth and periodontal attachment of the non-smoking group were better than those of the smoking group, with statistically significant differences(P＜0.05). After treatment, the positive rate of Pg and Pi in the smoking group was lower than that before treatment, the positive rate of Aa, Pg, Pi, Bf, Fn and Pm in the non-smoking group was lower than that before treatment, and the positive rate of Pg, Bf, Fn and Pm in the non-smoking group was lower than that in the smoking group, with statistically significant differences(P＜0.05). Conclusion Compared with smokers, non-smokers have better periodontal attachment recovery and lower detection rate of periodontal bacteria after periodontal treatment.

Objective To study the nutrition habits among Chinese-Korean children and adolescents in Yanbian Autonomous Prefecture, Jilin, China. Methods Data were obtained from the Chinese National Survey on Students' Constitution and Health in 1995, 2000, 2005, and 2010 for Chinese-Korean children and adolescents aged 7-18 years. The number of the subjects included was 4789, 4704, 5875, and 5315, respectively. Results The rate of the occurrence of stunting showed a declining trend from 1995 to 2010 (for boys: urban, 6.3%; rural, 12.7% in 1995 and 3.5% for both in 2010. For girls: urban, 7.8%; rural, 13.4% in 1995 and 4.2% and 5.5%, respectively, in 2010). Although the ratio of wasting did not show significant differences between the urban and rural children and adolescents in 1995, 2000, 2005, and 2010 respectively, the ratio of occurrence of overweight or obesity increased (for boys: urban, 7.3% and 1.3% in 1995, 17.6% and 12.9% in 2010; rural, 7.0% and 1.3% in 1995, 14.6% and 12.8% in 2010, respectively. For girls: urban, 8.1% and 1.0% in 1995, 17.3% and 8.6% in 2010; rural 5.7% and 0.7% in 1995, 16.4% and 7.4% in 2010, respectively). Conclusion The ratio of malnutrition in children and adolescents in Chinese-Korean areas declined from 1995 to 2010, and the distinction in malnutrition between the urban and rural areas was negligible in 2010. Further, the ratio of overweight and obesity increased over this period. [ABSTRACT FROM AUTHOR]

Objective: To assess the prevalence of malnutrition among children and adolescents in Xizang (Tibet)., Methods: We analyzed data from the Chinese National Survey on Students' Constitution and Health for the years 1995, 2000, 2005, and 2010 pertaining to Tibetan children and adolescents in lase (Lhasa), aged 7-18 years old. Numbers of survey subjects for these years were: 2393, 2754, 2397, and 2643, respectively., Results: Our results indicated that the rate of occurrence of stunting in Tibet has evidenced a gradual decline: for boys, from 26.8% in 2000 to 9.3% in 2010; and for girls, from 25.8% in 2000 to 10.8% in 2010. In general, the wasting rate for both boys and girls in Tibet has gradually decreased over time: for boys, from 17.7% in 1995 to 4.6% in 2005; and for girls from 12.5% in 1995 to 2.3% in 2005. The stunting rates of boys aged 7-13 years old and of girls aged 7-11 years old were 67.5% and 53.1%, respectively, while these rates for boys aged 14-18 years old and girls aged 12-18 years old were 32.5% and 46.9%, respectively., Conclusion: Stunting and wasting rates of Tibetan children and adolescents indicate a gradual declining trend over time. The stunting rates of both boys and girls during early puberty were significantly higher than those during late puberty., (Copyright © 2014 The Editorial Board of Biomedical and Environmental Sciences. Published by China CDC. All rights reserved.)