The Effect of Hibiscus Flower Extract (Hibiscus rosa-sinensis L.) on the Growth of Streptococcus sanguinis Bacteria

According to the data of Global Burden Disease in 2016, periodontal disease is the 11th disease suffered by 750,487 people worldwide. Gingivitis occurs due to dental plaque formation. A half of bacterial plaque populations are Streptococcus sp. Streptococcus sanguinis is a predominant bacterial that initiates plaque formation. The adherence of this bacteria is mediated by fimbriae, pilus protein, lipoprotein, and glucosyltransferase enzymes. Hibiscus flower has a potential as an antimicrobial agent that may inhibit plaque formation due its active component i.e. flavonoid, tannins, and saponin. This study aimed to investigate the effect of Hibiscus rosa-sinensis L. flower extract concentration on the growth of Streptococcus sanguinis. Wells diffusion method was used in this study, using 100 μl bacterial suspension of 1,5 × 108 CFU/ml of bacteria. Hibiscus flower extract (2, 4, 6), chlorhexidine 0,12 as a positive control, and distilled water as a negative control were added in the agar wells. The results showed that all concentrations (2 , 4, 6 ) of Hibiscus flower extract higher significantly compared to negative control. The concentration of 4 and 6 are higher;significantly compared to positive control. The largest inhibitory zone was at a concentration of 6 (6,35±0,09 mm) and the smallest inhibitory zone was at a concentration of 2 (2,51±0,12 mm). The conclusion is that the concentration of Hibiscus rosa-sinensis L. flower extract affects the growth of Streptococcus sanguinis. © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).