Table 2.

Position of the tip of the endodontic file relative to the apex foramen in the measurements performed until 0.0.

Position	Root ZX		Root ZX II		Root ZX  Mini
	n	%	n	%	N	%
<−1.0∗	0	0.0	0	0.0	0	0.0
−1.0 to −0.51∗	9	28.1	9	28.1	8	25.5
−0.5 to −0.01∗	16	50.0	12	37.5	12	37.5
0	6	18.8	7	21.9	8	25.0
0.01 to 0.05	0	0.0	2	6.3	2	6.3
0.51 to 1.0	1	3.1	1	3.1	2	6.3
1.0	0	0.0	1	3.1	0	0.0

^∗Negative values indicate that the endodontic file is positioned inside the root canal.