BRINNA LISTIANI, 020810048 (2013) EFEKTIVITAS DAYA HAMBAT EKSTRAK DAUN Ricinus communis L. TERHADAP PERTUMBUHAN KOLONI Streptococcus mutans. Skripsi thesis, UNIVERSITAS AIRLANGGA.

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Abstract

Dental Caries is a common infoctious disease. There have been many studies utilizing natural ingredients that aims to produce drugs in an effort to support dental health services programs, particularly to prevent and overcome disease dental caries caused by Streptococcus mutans. Streptococcus mutans is the prevalent decay microorganism. Antibacterial ingredients those commonly used are containing phenol, clorhexidine, fluorine, and hexetidine in the form of mouthwash and toothpaste. But the long term us:? of synthetic materials can cause adverse effects. Ricinus communis L. is one ofherbs which is used as a traditional antibacterial agent since long time ago because ofits active substance content that is Flavonoid The use of traditional herbs that are used as drugs rarely cause adverse side effects than drugs made from synthetic materials. Purpose. The aim ofthe present study was to investigate the inhibition effectiVity concentration from ethanol extracts of Ricinus communis L. against clinically isolated Streptococcus mutans. Method. Flavonoids extract was purified from ethanol extract ofRicinus communis L. leaves which was obtained from Ballitro, Cimanggu, Bogor, Jawa Barat Extract flavonoid... was dilutedinaquadestto 100%,50%,25%,12.5%,6.25%,3.125%,1.5625%,0.78125%, 0.390%, 0.195%. S.mutans were grown in medium BHIB and incubated with flavonoids for 24 hours at 37° C. Antibacterial activity was reflected by the diameter ofthe inhibition zone around the paperdisc. The data were analyzed by using ANOVA followed by LSD test with significance level of 5%. Result. The result of this study showed that all flavonoid significantly (p<0.05) inhibited the growth of S.mutans. 6.125% extract was the most effective concentration to inhibit the growth of S.mutans.Conclusion. The ethanol extracts ofRicinus communis L. demonstrated the inhibition effoctivity against the growth of Streptococcus mutans at certam concentration The most effective concentration that can inhibit the growth of S.mutans is 6.125%

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