Table 4.

Changes of occlusal indexes in the two groups before and after treatment

Group	Time	Occlusal time (s)	Balance of occlusal force in each side (%)
The observation group (n=49)	Pre-treatment	0.64±0.15	14.57±1.97
	Post-treatment	0.31±0.11*	9.64±1.46*
	t	12.419	14.074
	P	0.000	0.000
The control group (n=49)	Pre-treatment	0.61±0.20	14.76±1.89
	Post-treatment	0.42±0.14	11.36±0.97
	t	5.448	11.203
	P	0.000	0.000

Note: Compared with the control group in the same period;

^* P<0.05.