Search

Background: Periodontal disease is multi-factor. Itis caused by the interaction of microbes which accumulatedinto biofilms called plaques and increase the host’s inflammatory immune response. If plaque removal is notadequate, it causes gingivitis, and if it continues then it becomes a chronic infection and leads to attachmentloss. The bacteria that colonize inside supragingival plaque can be inhibited with something that containsantibacterial, e.g. lemongrass (Cymbopogoncitratus). Lemongrass contains many phytochemicals includingalkaloids, flavonoids, tannins, and saponins which can be used as antibacterials.Objective: The aim of this study is to determine the inhibitory power of citronella leaf extract againstsupragingival plaque bacterial activity.Method: This study used extracts diluted with serial dilution method on BHIB media with concentration of100%; 50%; 25%; 12.5%; 6.25%; 3.125%; 1.56%; 0.78% and bacteria are planted on MHA media. Then,bacterial colony was calculated.Results: There are significant differences in the growth of supragingival plaque bacterial colonies in allconcentrations.Conclusion: Lemongrass leaf extract (Cymbopogoncitratus) inhibits the growth of supragingival plaquebacterial colonies at a concentration ranging from 3,125%