Abstract
Background: glass ionomer is one of the most frequently used restorative materials for primary teeth restoration. It has been in use for more than 30 years. Their restoration usefulness is preferential compared to other restorations due to their fluoride release and recharge, chemical adhesion to the structure of the dentin and their range of uses. Increasing the antibacterial efficacy of restorative materials is one of the primary goals to decrease the incidence of recurrent caries. Chlorhexidine is the gold standard antibacterial agent in dentistry. Objectives: the objective of this study is to evaluate the antibacterial effect of Chlorhexidine incorporated with glass ionomer on streptococcus mutans. Methods: Thirty Children between ages ranged 6-9 years old were selected to participate in this study. Children with bilateral caries in lower second primary molars affecting the occlusal and proximal surfaces without pulpitis were included in the study. All cavities were divided into two groups; group (A) restored with Glass Ionomer and group (B) restored with Glass Ionomer Chlorhexidine mixture. The sound proximal surfaces in all cavitated teeth acted as a control. After one month, two months and three months’ plaque samples were obtained and streptococcus mutans counts were calculated. Results: The number of SM taken from sound proximal surfaces for all groups were not changed significantly in whole periods of study. At the all-time interval, the mean log10 of SM in CHX group was lower than GI group and the difference was statistically significant. There is a significant difference in the mean log10 of SM in CHX group between the 1St month and the 3rd month. Conclusion: The growth of SM was found to be higher in the sound tooth than in GI groups and in GI group was higher than in CHX- GI mixture up to three months.
Highlights
M any studies and documents have concluded caries lesions that develop around restorations are the most commonly reported reason for restoration replacement in primary teeth, especially when there is no compliance as child patient [1,2,3,4].Recurrent caries was the basis to the extent of the cavo-surface margin to a selfcleansable location where the toothbrush might have had access to the plaque
Streptococcus mutans and Lactobacillus acidophilus are often considered as the two most important cariogenic bacteria associated with dentine caries [8]
All cavities were divided into two groups: Group A: cavities in right second primary molars were restored by Fuji II LC (GC America Inc.) glass ionomer
Summary
M any studies and documents have concluded caries lesions that develop around restorations are the most commonly reported reason for restoration replacement in primary teeth, especially when there is no compliance as child patient [1,2,3,4].Recurrent caries was the basis to the extent of the cavo-surface margin to a selfcleansable location where the toothbrush might have had access to the plaque. M any studies and documents have concluded caries lesions that develop around restorations are the most commonly reported reason for restoration replacement in primary teeth, especially when there is no compliance as child patient [1,2,3,4]. Caries lesion mostly was seen on the proximal surface of the primary teeth, where the caries progression in this area seems to be faster than on occlusal surfaces [6,7]. Streptococcus mutans are essential for the initiation and advancement of caries, and lactobacillus acidophilus is frequently present in superficial and deep caries in large numbers. Streptococcus mutans and Lactobacillus acidophilus are often considered as the two most important cariogenic bacteria associated with dentine caries [8]
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