bacterial flora of carious lesions and caries-free surfaces in school students 13-16 years of age in Cairo

This study showed that the difference between group 3 and either of group 1 or group 2 was statistically significant as regards total bacterial count, total streptococcal count and Strep. mutans count. While, this difference was not significant between group 1 and group 2. It was also found that the difference in the mean percentage of total streptococcal count between the three groups was statistically insignificant at 5% level. As regards Strep. mutans, the difference in the mean percentage between group 1 and group 2 was not statistically significant; while it was significant between group 3 and either of group 1 or group 2 at 5% level

Effect of flossing with chlorhexidine gel on proximal caries in 12-15 years old school children in Cairo

Three hundred and fifty three [353] school children aged 12 years in Cairo were included in the study. They were examined for detection of proximal caries clinically and radiographically by using bite wing films. The children were divided into three groups: [1] cholorhexidine gel group [n=121], [2] placebo group [n=117], and control group [n=115]. After 3 years, the mean proximal caries increment [new DFS] was 2.23 in the chlorhexidine, 4.31 in the placebo gel group and 5.14 in the control group. The difference between the chlorhexidine gel and either of placebo and control group was statistically significant [P < 0.05 and P < 0.001 respectively]. The number of new proximal fillings s] was 0.31, 0.93 and 1.12 in chlorhexidine, placebo and control groups respectively

Effect of different fluoride mouthrinses in prevention of dental plaque among 15-year-old children in Cairo

Six hundred students 15-year-old were examined for assessment of plaque index scores. The children were randomly divided into four groups: three test groups using three fluoride mouth rinses [sodium fluoride, amine fluoride and mixture of sodium fluoride and amine fluoride] and one control group using placebo mouth rinse. Rinsing was done once per day for eight weeks. The results showed that all types of fluoride rinses could not completely prevent the development of dental plaque but they decreased the formation with different degrees. It had been also found that both amine fluoride mouth rinse and mixture of [sodium fluoride and amine fluoride] were more effective in prevention of dental plaque than sodium fluoride mouth rinse