[Table/Fig-3]:

Antimicrobial activity against S. mutans KPSK2 and L. casei of all tested herbal essential oils with concentration of 20% (v/v) determined by agar disk diffusion method and expressed in mean value of inhibition zone diameter (mm) with Standard Deviation (SD).

Tested agents	Inhibition zone {mean of diameter (mm) ± SD}
	S. mutans KPSK2	L. casei
Cinnamon (bark)	32.17±1.32	17.33±1.03
Sweet basil (leaf)	14.67±0.82	11.83±0.75
Peppermint (leaf)	11.33±1.03	9.00±0.89
Spearmint (leaf)	9.50±1.04	8.33±0.52
Black pepper (seed)	14.00±0.63	-
Sweet fennel (seed)	9.17±0.75	8.67±0.52
Kaffir lime (peel)	8.67±0.52	7.33±0.52
Kaffir lime (leaf)	8.50±0.55	7.16±0.41
10% DMSO	-	-
0.25% Chlorhexidine	29.83±0.75	27.50±0.55

(-): no inhibition zone