Effects of Er, Cr: YSGG Laser on Shear Bond Strength of the Orthodontic Brackets for 5 and 10 Seconds: An In Vitro Study

Table 6

Association between ARI scores and the different etching groups.

Method	ARI				χ2
	0	1	2	3
1 W	0 (0.0)	1 (8.3)	6 (50.0)	5 (41.7)	20.44	0.059
1.5 W	0 (0.0)	3 (25.0)	3 (25.0)	6 (50.0)
2 W	0 (0.0)	5 (41.7)	5 (41.7)	2 (16.7)
2.5 W	0 (0.0)	1 (8.3)	7 (58.3)	4 (33.3)
Acid etching	2 (16.7)	0 (0.0)	4 (33.3)	6 (50.0)
Total	2 (3.3)	10 (16.7)	25 (41.7)	23 (38.3)

significant.