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

Table 4 Intergroup comparison of mean gingival index scores between injectable platelet-rich fibrin + collagen membrane and collagen membrane at different time intervals using unpaired t test

mo	Group	n	mean ± SD	P value
0	i-PRF + CM	20	0.625 ± 0.16504	1.0
	CM	20	0.625 ± 0.16504	NS
1	i-PRF + CM	20	0.89 ± 0.14105	1.0
	CM	20	0.89 ± 0.18035	NS
3	i-PRF + CM	20	0.545 ± 0.1191	0.497
	CM	20	0.575 ± 0.15517	NS
6	i-PRF + CM	20	0.515 ± 0.14965	0.913
	CM	20	0.51 ± 0.13727	NS

Level of significance at P < 0.05. CM: Collagen membrane; i-PRF: Injectable platelet-rich fibrin; n: Number of frequency; NS: Not significant.