Antibacterial and antibiofilm activities of cinnamon essential oil nanoemulsion against multi-species oral biofilms
- Authors
- Jeong, Yeo-Jin; Kim, Hee-Eun; Han, Su-Jin; Choi, Jun-Seon
- Issue Date
- Mar-2021
- Publisher
- Nature Research
- Citation
- Scientific Reports, v.11, no.1
- Journal Title
- Scientific Reports
- Volume
- 11
- Number
- 1
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/80545
- DOI
- 10.1038/s41598-021-85375-3
- ISSN
- 2045-2322
- Abstract
- Cinnamon essential oil (CEO) has antibacterial properties, but its ability to suppress the formation of multi-species oral biofilms has not been fully elucidated. This study evaluated the antibacterial and antibiofilm activities of cinnamon essential oil nanoemulsion (CEON) against oral biofilms formed using a microcosm biofilm model. The biofilms were formed on bovine enamel specimens over a 7-day period, during which all specimens were treated with one of three solutions: 5% CEON (n = 35), 0.5% cocamidopropyl betaine (n = 35), or 0.12% chlorhexidine gluconate (CHX; n = 35). Antibacterial and antibiofilm activities were determined by the red/green ratios (R/G values) of 7-day-old mature biofilms photographed with quantitative light-induced fluorescence-digital, the number of aciduric bacterial colony-forming units (CFUs) within each biofilm, and the absorbance of bacterial suspensions. One-way and repeated-measures analysis of variance were performed to compare differences among the three solutions. R/G values were lowest in the 0.12% CHX group, but not significantly differ from the 5% CEON group. The number of CFUs and absorbance were lowest in the 5% CEON group. This study showed that nanoemulsified CEO inhibited the maturation of multi-species oral biofilms and the growth of oral microorganisms in biofilms, including aciduric bacteria that cause dental caries. © 2021, The Author(s).
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