Table 2. Comparison of loading and unloading mechanical properties between control and experimental groups.

One-way analysis of variance.

Parameter		Charcoal mouthwash	Probiotic mouthwash	Chlorhexidine mouthwash	Artificial saliva (control)
Yield strength (MPa)	Loading	872.34 ± 22.09	1177.71 ± 33.36	1175.25 ± 29.63	816.15 ± 20.58
	Unloading	497.22 ± 12.58	671.00 ± 19.01	669.55 ± 16.91	463.94 ± 13.84
Flexural modulus of elasticity (GPa)	Loading	26.77 ± 3.85	31.32 ± 4.97	31.06 ± 2.62	22.54 ± 3.73
	Unloading	23.81 ± 3.87	27.48 ± 4.54	27.97 ± 2.69	19.77 ± 3.65
Spring back ratio	Loading	0.0032 ± 0.0004	0.0037 ± 0.0005	0.0037 ± 0.0004	0.0036 ± 0.0005
	Unloading	0.0020 ± 0.0003	0.0024 ± 0.0003	0.0023 ± 0.0002	0.0024 ± 0.0005