Dental Hygiene and Orthodontics: Effect of Ultrasonic Instrumentation on Bonding Efficacy of Different Lingual Orthodontic Brackets

Table 1

Descriptive statistics of shear bond strength values (MPa) of the different groups.

Group	Code	Bracket	Manufacturer	Condition	Area (mm^2)	Mean	SD	Min	Mdn	Max
1	VIC	Victory	3M	Control	10.8	18.80	5.67	10.09	17.33	30.60	A
2	VIC + UI	Victory	3M	Ultrasonic	10.8	18.68	4.06	9.99	18.54	24.73	A
3	STB	STB	Ormco	Control	10.1	10.16	1.37	6.88	10.30	11.99	B, C, D
4	STB + UI	STB	Ormco	Ultrasonic	10.1	9.06	2.65	4.93	8.75	16.17	B, D
5	TTR	TTR	RMO	Control	7.9	20.55	4.28	12.88	20.44	28.73	A, E
6	TTR + UI	TTR	RMO	Ultrasonic	7.9	13.30	5.07	3.68	13.47	21.62	C
7	ID	Idea	Leone	Control	9.1	12.79	3.56	9.27	11.59	20.60	B, C
8	ID + UI	Idea	Leone	Ultrasonic	9.1	6.91	1.02	5.27	7.21	8.24	D
9	2D	2D	Forestadent	Control	9.3	23.80	3.44	16.00	24.72	29.79	E
10	2D + UI	2D	Forestadent	Ultrasonic	9.3	19.12	4.59	11.57	18.54	28.09	A

significance: groups with the same letter are not significantly different.