Table I.

Pain levels in the 3 tested groups.

Interval	Conventional	Self -ligation	Aligners	p value
At 4 hrs	5.17	3.76	2.67	0.001*
24hrs	5.53	3.82	2.72	0.001*
Day 3	3.25	2.33	1.27	0.001*
Day 7	2.49	1.65	1.20	0.001*

One Way ANOVA test;

^*indicates significance at p≤0.05