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ekstrak daun kersen Abstract Streptococcus viridans can cause subacute bacterial endocarditis in humans. Dentists should be cautious in root canal treatment. Irrigation is one of the stage in root canal treatment. The material usually used is sodium hypochlorite. Sodium hypochlorite could irritate the tissues. Alternative material is needed like cherry leaf (Muntingia calabura L.). Cherry leaf has an active content of flavonoids, saponins, and tanins as antibacterials. To determine antibacterial ability of cherry leaf extract againts Streptococcus viridans and to know the concentration of cherry leaf extract which has the biggest inhibition ability againts Streptococcus viridans. This research consist of 5 groups: possitive control (sodium hypochlorite), P1 (cherry leaf extract 12,5%), P2 (cherry leaf extract 25%), P3 (cherry leaf extract 50%), P4 (Cherry leaf extract 75%). BHI-A medium was planted with Streptococcus viridans suspension. Furthermore the disc paper that has been treated according to the group placed on the BHI-A medium. Medium Incubated for 24 hours, then the inhibition zone diameter measured. The largest inhibition zone was in the P4 group (cherry leaf extract 75%). The conclusion of this research was cherry leaf extract had antibacterial power against Streptococcus viridans. The concentration of cherry leaf extract which had the greatest inhibitory effect on Streptococcus viridans was 75%.

Uji Antibakteri Ekstrak Daun Kersen (Muntingia Calabura L.) Terhadap Koloni Streptococcus viridans