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

Calcium hydroxide as an activator in induced apexification

This study included 24 schoolchildren of both sexes aged 8-10 years with two traumatized pulpless immature upper anterior teeth. One tooth was filled with calcium hydroxide and compherated parachlorophenol [CPCP], against the other tooth as control canals dressed with CPCP only. Radiographic and clinical observations were used to evaluate the calcific changes, which were formed at the apex of the immature tooth. Apical barrier was detected at the end of the experiment of 15 months period in approximately 91.5% of cases filled with calcium hydroxide, while 1 of empty control canals showed an evidence of bridging at the apex