Muscle Activity in Pre-Treatment and Post-Treatment Oral Submucous Fibrosis Patients: Electromyography Study

Table 1

Right side masseter muscle duration before and after treatment.

Groups	Before		After		Mean difference	% of mean change	t value	value
	Mean	SD	Mean	SD
Group A	7.26	0.36	7.25	0.31	0.01	0.14	0.277	0.783
Group B	7.36	0.39	7.26	0.49	0.10	1.36	1.490	0.143
Group C	7.38	0.62	7.30	0.56	0.08	1.08	1.735	0.090
Group D	5.23	0.51	5.13	0.56	0.10	1.91	1.463	0.151
Control	7.24	0.18	7.21	0.19	0.03	0.41	0.942	0.351
F value	204.328	204.505	—
value

, Group A (mouth opening more than 35 mm), Group B (mouth opening between 30 and 35 mm), Group C (mouth opening between 20 and 30 mm), and Group D (mouth opening less than 20 mm).