Table 4. Intra- and inter-group comparison of clinical parameters at different time.

Groups	Mean±SD. T0	Mean±SD. T1	Mean±SD. T2	p** (Bonferroni)
				T0–T1	T0–T2	T1-T2
KTW Thin Phenotype	2.34±1.08	2.89±1.17	2.73±1.18	0.003	0.003	1.000
Thick Phenotype	2.73±0.95	3.28±1.12	3.08±0.89	0.000	0.099	0.633
p	0.037	.177	.136
GT Thin Phenotype	0.67±0.30	0.98±0.47	0.78±0.27	0.009	0.081	0.222
Thick Phenotype	1.11±0.33	1.15±0.43	1.23±0.37	1.000	1.000	1.000
P	0.000	.111	.000
RD Thin Phenotype	1.57±0.78	1.29±0.69	1.17±0.76	0.021	0.024	1.000
Thick Phenotype	1.61±0.76	1.10±0.85	1.06±0.71	0.000	0.003	1.000
P	.941	.168	.462
RW Thin Phenotype	2.03±0.87	1.80±0.77	2.26±1.22	0.057	1.000	0.351
Thick Phenotype	1.79±0.80	1.17±1.03	1.64±1.20	1.000	0.435	1.000
P	.188	.596	.081
PI Thin Phenotype	0.91±0.61	1.10±0.70	0.41±0.52	0.138	0.138	0.090
Thick Phenotype	0.52±0.63	0.48±0.57	0.20±0.35	1.000	0.132	0.084
P	0.009	.001	.103
GI Thin Phenotype	1.11±0.47	0.84±0.52	0.39±0.52	0.024	0.000	0.006
Thick Phenotype	1.00±0.37	0.84±0.37	0.01±0.05	0.075	0.000	0.000
P	.923	.923	.000
PD Thin Phenotype	1.40±0.40	1.43±0.37	1.93±0.70	0.741	0.000	0.000
Thick Phenotype	1.49±0.58	1.55±0.55	1.28±0.33	0.660	1.000	0.408
P	.931	.569	.000
BOP% Thin Phenotype	31.43±47.1	16.13±37.39	5.47±19.81	0.042	0.009	0.222
Thick Phenotype	22.65±42.47	16.13±37.39	0.00±0.00	0.315	0.069	0.471
p	.700	1.000	.112
VD Thin Phenotype	9.19±1.89	9.37±1.88	9.94±2.18	0.033	0.033	0.081
Thick Phenotype	7.92±1.90	8.23±2.05	8.92±3.01	0.015	0.018	0.144
p	.017	.043	.067

*p<0.05. Mann–Whitney U Test. **Wilcoxon signed-rank test. KTW: Keratinized tissue width, GT: Gingival thickness, RD: Recession depth, RW: Recession width, PI: Plaque index, GI: Gingival index, PD: Probing depth, BOP%: Bleeding on probing, VD: Vestibular depths, T0: Before the I-PRF procedure T1: Nine months after the procedure T2: 12–48 months after the procedure.