Table 1.

Pre- and post-splint therapy diffusion tensor parameter values

		Masseter muscle		Lateral pterygoid muscle		Medial pterygoid muscle
Left	Right	Left	Right	Left	Right
FA	Pre	0.385 ± 0.17	0.395 ± 0.17	0.392 ± 0.12	0.362 ± 0.10	0.380 ± 0.11	0.386 ± 0.80
Post	0.307 ± 0.11	0.364 ± 0.14	0.323 ± 0.10	0.316 ± 0.09	0.378 ± 0.12	0.379 ± 0.12
Variation	↓ 20.26	↓ 7.84	↓ 17.60	↓ 12.71	↓ 0.53	↓ 1.81
MD	Pre	0.915 ± 0.41	0.927 ± 0.42	0.937 ± 0.29	0.998 ± 0.25	0.824 ± 0.19	0.913 ± 0.20
Post	1.142 ± 0.30	0.966 ± 0.31	1.148 ± 0.32	1.146 ± 0.29	0.889 ± 0.25	0.930 ± 0.25
Variation	↑ 24.80	↑ 4.20	↑ 22.52	↑ 14.83	↑ 7.89	↑ 1.86
AD	Pre	1.193 ± 0.45	1.215 ± 0.47	1.252 ± 0.33	1.330 ± 0.30	1.096 ± 0.23	1.206 ± 0.22
Post	1.449 ± 0.34	1.266 ± 0.34	1.467 ± 0.36	1.464 ± 0.32	1.185 ± 0.28	1.215 ± 0.28
Variation	↑ 21.45	↑ 4.20	↑17.17	↑ 10.07	↑ 8.12	↑ 0.75
RD	Pre	0.776 ± 0.39	0.783 ± 0.39	0.780 ± 0.18	0.831 ± 0.19	0.688 ± 0.28	0.767 ± 0.24
Post	0.989 ± 0.29	0.816 ± 0.30	0.989 ± 0.24	0.988 ± 0.24	0.740 ± 0.30	0.787 ± 0.28
Variation	↑ 27.45	↑ 4.21	↑ 26.80	↑ 18.89	↑ 7.56	↑ 2.61

AD, axial diffusivity; FA, fractional anisotropy; LPM, lateral pterygoid muscle; MD, mean diffusivity; MM, Masseter muscle; MPM, medial pterygoid muscle; Pre, pre splint therapy; Post, post splint therapy; RD, radial diffusivity; SD, standard deviation.

FA, MD, AD and RD values, ± SD are evaluated as mean of all tracts for each muscle. Percentage variation (variation) is represented in bold as increment (↑) and decrement (↓) values of diffusion tensor parameters between pre and post splint therapy.