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. 2023 Jun 21;15(6):e40768. doi: 10.7759/cureus.40768

Table 2. Determination of MBC of cinnamon essential oil, Cajeput essential oil, their combination, and 0.2% chlorhexidine gluconate against Staphylococcus aureus, Enterococcus faecalis, and Candida albicans.

The results are shown as average values of triplicates in mg/mL (mean ± standard deviation).

The statistical test applied was the Kruskal-Wallis test.

The post hoc test applied was Bonferroni post hoc test.

aThe gold standard of 0.2% CHX was not statistically significant.

b,cSignificant differences when compared to 0.2% CHX (in the same row).

*P ≤ 0.05 was considered statistically significant.

MBC, minimum bactericidal concentration; CHX, chlorhexidine hydrochloride solution

Test microorganisms MBC (mg/mL) Statistics
0.2% CHX Cinnamon oil Cajeput oil Combination Z-value P-value
 Staphylococcus aureus   6.51 ± 2.26a   0.33 ± 0.14b   5.21 ± 2.26a   0.65 ± 0.28c   9.482   0.024*
 Enterococcus faecalis   15.63 ± 0.02a   0.41 ± 0.14b   2.77 ± 1.97a   1.38 ± 0.99c   8.253   0.041*
 Candida albicans   10.42 ± 4.51a   2.85 ± 2.11a   5.86 ± 3.38a   1.30 ± 0.56b   6.431   0.092