Table 3.

Statistical differences between TFI/bonding/etching groups according to Mann-Whitney U Test for occlusal and cervical margins (P<.05 = *).

Significant differences between test groups		Values of Mann-Whitney U Test		P<.05 = *
				Oclusally	Cervically
0a	0b	10.5	7.5	.037*	.015*
	0c	10	10.5	.03*	.037*
	1a	12.5	23.5	.054	.872
	1b	24.5	15	1	.091
	1c	5	5	.007*	.006*
	4a	5	3	.006*	.004*
	4b	12.5	14	.054	.122
	4c	5	0	.007*	.001*
0b	0c	2	1.5	.002*	.002*
	1a	2.5	7.5	.002*	.015*
	1b	10.5	14	.037*	.107
	1c	1	0	.001*	.001*
	4a	1	0	.001*	.001*
	4b	2.5	3	.002*	.004*
	4c	1	0	.002*	.001*
0c	1a	21	13.5	.591	.116
	1b	10	3	.030*	.002*
	1c	16	15	.225	.091
	4a	17.5	9	.298	.020*
	4b	21	21	.591	.53
	4c	14.5	0	.165	.001*
1a	1b	12.5	15	.054	.091
	1c	13	8.5	.1	.028*
	4a	14	6	.122	.013*
	4b	24.5	16.5	1	.253
	4c	12	1	.08	.002*
1b	1c	5	0	.007*	.001*
	4a	5	0	.006*	.001*
	4b	12.5	6	.054	.007*
	4c	5	0	.007*	.001*
1c	4a	22	16.5	.705	.244
	4b	13	12.5	1	.054
	4c	21.5	2	.678	.020*
4a	4b	14	7.5	.122	.015*
	4c	19.5	7.5	.473	.020*
4b	4c	12	0	.08	.001*