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

Table 10 Intergroup comparison of mean recession width scores between injectable platelet-rich fibrin + collagen membrane and collagen membrane at different time intervals using Mann-Whitney U test

Time (mo)	Group	n	mean ± SD		P value
0	i-PRF + CM	20	3.5	0.607	0.400
	CM	20	3.7	0.733	NS
1	i-PRF + CM	20	0.5	0.889	0.107
	CM	20	1	1.026	NS
3	i-PRF + CM	20	1	1.026	0.080
	CM	20	1.85	0.875
6	i-PRF + CM	20	1.65	1.04	0.001a
	CM	20	2.55	0.759

^aP < 0.01 statistically significant.

Level of significance at ^aP < 0.05. CM: Collagen membrane; i-PRF: Injectable platelet-rich fibrin; NS: Not significant using Mann-Whitney U test.