A Comparative Study on the Effect of Different Methods of Recycling Orthodontic Brackets on Shear Bond Strength

Table 1

Shear bond strength mean values (in MPa) of different groups.

Group	N	Mean	Std. deviation	Minimum	Maximum	Median
Group I (control)	30	10.35	0.46	9.48	11.12	10.34
Group II (flaming)	30	4.30	0.55	3.36	5.26	4.22
Group III (flaming with sandblasting)	30	9.36	0.55	8.45	10.43	9.31
Group IV (flaming with ultrasonic cleaning)	30	5.97	0.66	4.91	7.07	5.91