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KMID : 0376319920040010163
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Dental Journal of CNU
1992 Volume.4 No. 1 p.163 ~ p.173
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Antibacterial effect of fluoride and chlorhexidine against cariogenic bacteria in children with removable orthodontic appliances
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Abstract
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The purpose of this study was to examine the antibacterial activities of fluoride and chlorhexidine against Streptococcus mutans and lactobacillus. All subjects, who had not taken antibacterial ;medication at least one month before treatment.
They
were
divided into 5 groups; Group had received treatment with placebo gel, group with 1.23% sodium fluoride, group with amine fluoride, group with 1.23% sodium fluoride and amine fluoride, and group with 0.1% chlorhexidine solution. Salivary samples
were
collected from 50 children who treated by removable orthodontic appliances in the Department of Pedodontics. Chonnam National University Hospital. The number of Streptococcus mutans and lactobacillus in saliva were monitored for 5 weeks after the
treatment using Mitis-Salivarius-Bacitracin agar plate and Rogosa SL agar plate.
@ES The results were as follows:
@EN 1. The mean number of salivary Streptococcus mutans was 1.13×10E6 CFU/㎖ and lactobacillus was 6.43×10E5 CFU/㎖before treatment.
2. The number of salivary Streptococcus mutans were significantly reduced to 6.40×10E5 CFU/㎖in group II 5.71×10E5 CFU/㎖ in group III, 2.16×10E5 CFU/㎖ in group IV, 1.16×10E5 CFU/㎖ in group V in 1 week after treatment (p<0.05).
3. The number of streptococcus mutans returned to the baseline at 5th week after treatment
4. The number of salivary lactobacillus were not significantly changed in all groups.
These results suggest that continuous application of fluoride or chlorhexidine may prevent dental caries on orthodontic patients wearing removable appliance with high risk of dental caries.
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