Evaluation of Gingival Microleakage in Class II Composite Restorations with Different Lining Techniques: An In Vitro Study

Table 3

Comparison of leakage in different groups using Mann-Whitney test.

Group	Mean rank	value
1	15.45	<0.001
2	5.55
1	15.10	<0.001
3	5.90
1	13.85	0.005
4	7.15
2	7.35	0.013
3	13.65
2	5.95	<0.001
4	15.05
3	7.85	0.043
4	13.15

The difference between the groups is statistically significant.