Comparative evaluation of effect of injectable platelet-rich fibrin with collagen membrane compared with collagen membrane alone for gingival recession coverage

Table 11 Intragroup comparison of mean recession width scores obtained by using injectable platelet-rich fibrin + collagen membrane and collagen membrane at different time intervals using Wilcoxon signed rank test

i-PRF + CM in mo	mean ± SD	P value	CM in mo	mean ± SD	P value
0	3.5 ± 0.6	0.001a	0	3.7 ± 0.73	0.001a
1	0.5 ± 0.8		1	1 ± 1.02
0	3.5 ± 0.6	0.001a	0	3.7 ± 0.73	0.001a
3	1 ± 1.02		3	1.85 ± 0.85
0	3.5 ± 0.6	0.001a	0	3.7 ± 0.73	0.001a
6	1.65 ± 1.03		6	2.55 ± 0.75
1	0.5 ± 0.8	0.025b	1	1 ± 1.02	0.004a
3	1 ± 1.02		3	1.85 ± 0.85
1	0.5 ± 0.8	0.001a	1	1 ± 1.02	0.001a
6	1.65 ± 1.03		6	2.55 ± 0.75
3	1 ± 1.02	0.009a	3	1.85 ± 0.85	0.001a
6	1.65 ± 1.03		6	2.55 ± 0.75

^aP < 0.01 statistically significant.

^bP < 0.05 statistically significant.

Level of significance at P < 0.05. CM: Collagen membrane; i-PRF: Injectable platelet-rich fibrin.