The aim of this study was to investigate antimicrobial effect of oleanolic acid (OA), ursolic acid (UA), and sophoraflavanone G against Enterococcus faecalis and Propionibacterium acnes, which are the major causative bacteria of endodontic infections. The antimicrobial activity was evaluated by the minimal inhibitory concentration (MIC). The data showed that the OA, UA, and sophoraflavanone G had antimicrobial effect on all the strains use in the study with 16-64 µg/ml, 8-64 µg/ml, and 1-8 µg/ml of MIC values, respectively. These results indicate that OA, UA, and sophoraflavanone G could be useful in the development of antiseptic solution for washing the root canal in endodontic treatments.

• Jo, Eojin(Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University)
• Choi, Mi-Hwa( Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University) | Choi, Mi-Hwa
• Kim, Hwa-Sook( Department of Dental Hygiene, Chunnam Techno University) | Kim, Hwa-Sook
• Park, Soon-Nang( Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University) | Park, Soon-Nang
• Lim, Yun Kyong( Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University) | Lim, Yun Kyong
• Kang, Christina K.( Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University) | Kang, Christina K.
• Kook, Joong-Ki( Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University) | Kook, Joong-Ki