Relationship between the Apical Preparation Diameter and the Apical Seal: An In Vitro Study

Table 1

Calculation of the average, variance, and standard deviation of the dye penetration depths in the 3 experimental groups.

	Average (mm)	Variance	Standard deviation
Grp 1 (F1)	1.0220	0.7168	0.8467
Grp 2 (F3)	1.3867	1.2870	1.1344
Grp 3 (F5)	2.2907	5.1899	2.2781
		value	0.08108