Table 2.

Statistical analysis of intergroup and intragroup comparisons of the amount and percentage of relapse between control and experimental groups

Group	Degree of rotation (°)	Amount of relapse (°)			Percentage of relapse (%)
		After 2 weeks	After 4 weeks		After 2 weeks	After 4 weeks
Control	21.40 ± 5.95	13.19 ± 3.88	16.96 ± 5.55		64.57 ± 18.86	81.09 ± 18.80
Experimental	23.32 ± 2.57	6.71 ± 2.99*	9.19 ± 3.31*,†		28.01 ± 10.68*	38.85 ± 11.85*,†

Values are presented as mean ± standard deviation.

The symbol (*) indicates statistical significance between the control group and experimental group based on intergroup comparisons (*p < 0.05, paired t-test). The symbol (†) indicates statistical significance of the mean amount and percentage of rotational relapse between 2 and 4 weeks after the retention period based on intragroup comparisons (^†p < 0.05, paired t-test).