. Author manuscript; available in PMC: 2019 Feb 1.

Published in final edited form as: Dent Mater. 2017 Nov 26;34(2):272–281. doi: 10.1016/j.dental.2017.11.012

Table 3.

Surface free energy of different groups.

Group	Water contact angle (°)	Diiodomethane contact angle (°)	Surface free energy (mN/m)
Control	100.24 ± 2.48	57.47 ± 5.25	30.41
Group SA	92.03 ± 4.52	53.03 ± 3.84	33.97
Group DH	96.14 ± 3.08	50.47 ± 1.90	34.81
Group UVC	81.58 ± 1.14	52.21 ± 4.00	37.38
Group γ	69.89 ± 0.17	50.33 ± 1.43	43.28