Table 2. Pairwise comparison of mean gingival display (in mm) between four time intervals by Bonferroni test.

Gingival display (Period of Interval)		Significance	95% Confidence interval for difference
			Lower bound	Upper bound
Pre op	Post op 2 weeks	< 0.001*	1.531	4.269
Pre op	Post op 3 months	0.004*	0.592	3.008
Pre op	Post op 6 months	0.143	-.144	1.344
Post op 2 weeks	Post op 3 months	0.001*	-1.704	-.496
Post op 2 weeks	Post op 6 months	< 0.001*	-3.309	-1.291
Post op 3 months	Post op 6 months	0.006*	-2.039	-.361

*The mean difference is significant at the 0.05 level