TABLE 2.

Mean value and standard deviation (SD) of increase in root thickness (mm) and the percentage of increase in all groups

Groups	Subgroup A (1 mo)		Subgroup B (2 mo)		Subgroup C (3 mo)		P‐value
	Mean	SD	Mean	SD	Mean	SD
Group I (blood clot)	0.26aA (8%)	0.07	0.31bA (9.5%)	0.05	0.35cA (10.7%)	0.06	≤.001*
Group II (EDTA + blood clot)	0.30aAB (9.2%)	0.07	0.34bAB (10.4%)	0.06	0.37cA (11.35%)	0.08	≤.001*
Group III (PRF)	0.32aAB (9.6%)	0.04	0.38bBC (12.16%)	0.07	0.44cB (14.1%)	0.06	≤.001*
Group IV (EDTA + PRF)	0.34aB (10.1%)	0.05	0.43bC (12.7%)	0.09	0.50cC (14.9%)	0.08	≤.001*
Group V (positive control)	0.00		0.00		0.00
Group VI (negative control)	0.43aC (12.7%)	0.08	0.51bD (15.7%)	0.08	0.58cD (17.96%)	0.05	.003*
P‐value	≤0.001*		≤0.001*		≤0.001*

The same upper‐case letters within each column indicate differences that were not significant.

The same lower‐case letters within each row indicate differences that were not significants.

Abbreviation: NS, not significant.

^*Significant at P ≤ .05.